alamin/websurfx
alamin/websurfx
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Merge branch 'rolling' into doc

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alamin655 2023-09-14 13:39:21 +05:30 committed by GitHub
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1
.gitignore vendored
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@ -4,3 +4,4 @@ package-lock.json
dump.rdb
.vscode
megalinter-reports/
dhat-heap.json

2
.gitpod.Dockerfile vendored
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@ -1,3 +1,3 @@
FROM gitpod/workspace-rust
RUN sudo install-packages redis-server nodejs npm
RUN sudo install-packages redis-server nodejs npm liblua5.4-dev liblua5.3-dev liblua5.2-dev liblua5.1-0-dev libluajit-5.1-dev

528
Cargo.lock generated
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26
Cargo.toml
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@ -1,6 +1,6 @@
[package]
name = "websurfx"
version = "0.18.6"
version = "0.20.7"
edition = "2021"
description = "An open-source alternative to Searx that provides clean, ad-free, and organic results with incredible speed while keeping privacy and security in mind."
repository = "https://github.com/neon-mmd/websurfx"
@ -8,9 +8,9 @@ license = "AGPL-3.0"
[dependencies]
reqwest = {version="0.11.20",features=["json"]}
tokio = {version="1.32.0",features=["full"]}
tokio = {version="1.32.0",features=["rt-multi-thread","macros"]}
serde = {version="1.0.188",features=["derive"]}
handlebars = { version = "4.3.7", features = ["dir_source"] }
handlebars = { version = "4.4.0", features = ["dir_source"] }
scraper = {version="0.17.1"}
actix-web = {version="4.4.0", features = ["cookies"]}
actix-files = {version="0.6.2"}
@ -19,14 +19,20 @@ serde_json = {version="1.0.105"}
fake-useragent = {version="0.1.3"}
env_logger = {version="0.10.0"}
log = {version="0.4.20"}
rlua = {version="0.19.7"}
redis = {version="0.23.2"}
mlua = {version="0.8.10", features=["luajit"]}
redis = {version="0.23.3", features=["tokio-comp","connection-manager"]}
md5 = {version="0.7.0"}
rand={version="0.8.5"}
once_cell = {version="1.18.0"}
error-stack = {version="0.4.0"}
async-trait = {version="0.1.73"}
regex = {version="1.9.4", features=["perf"]}
smallvec = {version="1.11.0", features=["union", "serde"]}
futures = {version="0.3.28"}
dhat = {version="0.3.2", optional = true}
mimalloc = { version = "0.1.38", default-features = false }
async-once-cell = {version="0.5.3"}
actix-governor = {version="0.4.1"}
[dev-dependencies]
rusty-hook = "^0.11.2"
@ -47,13 +53,17 @@ rpath = false
[profile.release]
opt-level = 3
debug = false
debug = false # This should only be commented when testing with dhat profiler
# debug = 1 # This should only be uncommented when testing with dhat profiler
split-debuginfo = '...'
debug-assertions = false
overflow-checks = false
lto = 'thin'
lto = true
panic = 'abort'
incremental = false
codegen-units = 16
codegen-units = 1
rpath = false
strip = "debuginfo"
[features]
dhat-heap = ["dep:dhat"]

2
README.md
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@ -51,7 +51,7 @@
- **Getting Started**
- [🔭 Preview](#preview-)
- [🚀 Features](#features-)
- [🛠️ Installation and Testing](#installation-and-testing-)
- [🛠️ Installation and Testing](#installation-and-testing-%EF%B8%8F)
- [🔧 Configuration](#configuration-)
- **Feature Overview**
- [🎨 Theming](#theming-)

2
docs/installation.md
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@ -109,7 +109,7 @@ colorscheme = "catppuccin-mocha" -- the colorscheme name which should be used fo
theme = "simple" -- the theme name which should be used for the website
-- ### Caching ###
redis_connection_url = "redis://redis:6379" -- redis connection url address on which the client should connect on.
redis_url = "redis://redis:6379" -- redis connection url address on which the client should connect on.
-- ### Search Engines ###
upstream_search_engines = { DuckDuckGo = true, Searx = false } -- select the upstream search engines from which the results should be fetched.

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29
public/static/themes/simple.css
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@ -132,6 +132,35 @@ body {
width: 1.2rem;
height: 1.2rem;
}
.results .result_disallowed,
.results .result_filtered {
display: flex;
justify-content: center;
align-items: center;
gap: 10rem;
font-size: 2rem;
color: var(--foreground-color);
margin: 0rem 7rem;
}
.results .result_disallowed .user_query,
.results .result_filtered .user_query {
color: var(--background-color);
font-weight: 300;
}
.results .result_disallowed img,
.results .result_filtered img {
width: 30rem;
}
.results .result_disallowed div,
.results .result_filtered div {
display: flex;
flex-direction: column;
gap: 1rem;
line-break: strict;
}
/* styles for the footer and header */

92
public/templates/search.html
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@ -1,37 +1,69 @@
{{>header this.style}}
<main class="results">
{{>search_bar this}}
<div class="results_aggregated">
{{#if results}} {{#each results}}
<div class="result">
<h1><a href="{{{this.url}}}">{{{this.title}}}</a></h1>
<small>{{{this.url}}}</small>
<p>{{{this.description}}}</p>
<div class="upstream_engines">
{{#each engine}}
<span>{{{this}}}</span>
{{/each}}
</div>
{{>search_bar this}}
<div class="results_aggregated">
{{#if results}} {{#each results}}
<div class="result">
<h1><a href="{{{this.url}}}">{{{this.title}}}</a></h1>
<small>{{{this.url}}}</small>
<p>{{{this.description}}}</p>
<div class="upstream_engines">
{{#each engine}}
<span>{{{this}}}</span>
{{/each}}
</div>
</div>
{{/each}} {{else}} {{#if disallowed}}
<div class="result_disallowed">
<div class="description">
<p>
Your search - <span class="user_query">{{{this.pageQuery}}}</span> -
has been disallowed.
</p>
<p class="description_paragraph">Dear user,</p>
<p class="description_paragraph">
The query - <span class="user_query">{{{this.pageQuery}}}</span> - has
been blacklisted via server configuration and hence disallowed by the
server. Henceforth no results could be displayed for your query.
</p>
</div>
<img src="./images/barricade.png" alt="Image of a Barricade" />
</div>
{{else}} {{#if filtered}}
<div class="result_filtered">
<div class="description">
<p>
Your search - <span class="user_query">{{{this.pageQuery}}}</span> -
has been filtered.
</p>
<p class="description_paragraph">Dear user,</p>
<p class="description_paragraph">
All the search results contain results that has been configured to be
filtered out via server configuration and henceforth has been
completely filtered out.
</p>
</div>
<img src="./images/filter.png" alt="Image of a paper inside a funnel" />
</div>
{{else}}
<div class="result_not_found">
<p>Your search - {{{this.pageQuery}}} - did not match any documents.</p>
<p class="suggestions">Suggestions:</p>
<ul>
<li>Make sure that all words are spelled correctly.</li>
<li>Try different keywords.</li>
<li>Try more general keywords.</li>
</ul>
<img src="./images/no_results.gif" alt="Man fishing gif" />
</div>
{{/if}} {{/if}} {{/if}}
</div>
{{/each}} {{else}}
<div class="result_not_found">
<p>Your search - {{{this.pageQuery}}} - did not match any documents.</p>
<p class="suggestions">Suggestions:</p>
<ul>
<li>Make sure that all words are spelled correctly.</li>
<li>Try different keywords.</li>
<li>Try more general keywords.</li>
</ul>
<img src="./images/no_results.gif" alt="Man fishing gif" />
<div class="page_navigation">
<button type="button" onclick="navigate_backward()">
&#8592; previous
</button>
<button type="button" onclick="navigate_forward()">next &#8594;</button>
</div>
{{/if}}
</div>
<div class="page_navigation">
<button type="button" onclick="navigate_backward()">
&#8592; previous
</button>
<button type="button" onclick="navigate_forward()">next &#8594;</button>
</div>
</main>
<script src="static/index.js"></script>
<script src="static/pagination.js"></script>

14
src/bin/websurfx.rs
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@ -3,9 +3,19 @@
//! This module contains the main function which handles the logging of the application to the
//! stdout and handles the command line arguments provided and launches the `websurfx` server.
use mimalloc::MiMalloc;
use std::net::TcpListener;
use websurfx::{config::parser::Config, run};
/// A dhat heap memory profiler
#[cfg(feature = "dhat-heap")]
#[global_allocator]
static ALLOC: dhat::Alloc = dhat::Alloc;
#[cfg(not(feature = "dhat-heap"))]
#[global_allocator]
static GLOBAL: MiMalloc = MiMalloc;
/// The function that launches the main server and registers all the routes of the website.
///
/// # Error
@ -14,6 +24,10 @@ use websurfx::{config::parser::Config, run};
/// available for being used for other applications.
#[actix_web::main]
async fn main() -> std::io::Result<()> {
// A dhat heap profiler initialization.
#[cfg(feature = "dhat-heap")]
let _profiler = dhat::Profiler::new_heap();
// Initialize the parsed config file.
let config = Config::parse(false).unwrap();

130
src/cache/cacher.rs vendored
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@ -1,17 +1,24 @@
//! This module provides the functionality to cache the aggregated results fetched and aggregated
//! from the upstream search engines in a json format.
use error_stack::Report;
use futures::future::try_join_all;
use md5::compute;
use redis::{Client, Commands, Connection};
use redis::{aio::ConnectionManager, AsyncCommands, Client, RedisError};
use super::error::PoolError;
/// A named struct which stores the redis Connection url address to which the client will
/// connect to.
///
/// # Fields
///
/// * `redis_connection_url` - It stores the redis Connection url address.
#[derive(Clone)]
pub struct RedisCache {
connection: Connection,
/// It stores a pool of connections ready to be used.
connection_pool: Vec<ConnectionManager>,
/// It stores the size of the connection pool (in other words the number of
/// connections that should be stored in the pool).
pool_size: u8,
/// It stores the index of which connection is being used at the moment.
current_connection: u8,
}
impl RedisCache {
@ -19,11 +26,25 @@ impl RedisCache {
///
/// # Arguments
///
/// * `redis_connection_url` - It stores the redis Connection url address.
pub fn new(redis_connection_url: String) -> Result<Self, Box<dyn std::error::Error>> {
/// * `redis_connection_url` - It takes the redis Connection url address.
/// * `pool_size` - It takes the size of the connection pool (in other words the number of
/// connections that should be stored in the pool).
pub async fn new(
redis_connection_url: &str,
pool_size: u8,
) -> Result<Self, Box<dyn std::error::Error>> {
let client = Client::open(redis_connection_url)?;
let connection = client.get_connection()?;
let redis_cache = RedisCache { connection };
let mut tasks: Vec<_> = Vec::new();
for _ in 0..pool_size {
tasks.push(client.get_tokio_connection_manager());
}
let redis_cache = RedisCache {
connection_pool: try_join_all(tasks).await?,
pool_size,
current_connection: Default::default(),
};
Ok(redis_cache)
}
@ -32,7 +53,7 @@ impl RedisCache {
/// # Arguments
///
/// * `url` - It takes an url as string.
fn hash_url(url: &str) -> String {
fn hash_url(&self, url: &str) -> String {
format!("{:?}", compute(url))
}
@ -41,9 +62,42 @@ impl RedisCache {
/// # Arguments
///
/// * `url` - It takes an url as a string.
pub fn cached_json(&mut self, url: &str) -> Result<String, Box<dyn std::error::Error>> {
let hashed_url_string = Self::hash_url(url);
Ok(self.connection.get(hashed_url_string)?)
pub async fn cached_json(&mut self, url: &str) -> Result<String, Report<PoolError>> {
self.current_connection = Default::default();
let hashed_url_string: &str = &self.hash_url(url);
let mut result: Result<String, RedisError> = self.connection_pool
[self.current_connection as usize]
.get(hashed_url_string)
.await;
// Code to check whether the current connection being used is dropped with connection error
// or not. if it drops with the connection error then the current connection is replaced
// with a new connection from the pool which is then used to run the redis command then
// that connection is also checked whether it is dropped or not if it is not then the
// result is passed as a `Result` or else the same process repeats again and if all of the
// connections in the pool result in connection drop error then a custom pool error is
// returned.
loop {
match result {
Err(error) => match error.is_connection_dropped() {
true => {
self.current_connection += 1;
if self.current_connection == self.pool_size {
return Err(Report::new(
PoolError::PoolExhaustionWithConnectionDropError,
));
}
result = self.connection_pool[self.current_connection as usize]
.get(hashed_url_string)
.await;
continue;
}
false => return Err(Report::new(PoolError::RedisError(error))),
},
Ok(res) => return Ok(res),
}
}
}
/// A function which caches the results by using the hashed `url` as the key and
@ -54,21 +108,45 @@ impl RedisCache {
///
/// * `json_results` - It takes the json results string as an argument.
/// * `url` - It takes the url as a String.
pub fn cache_results(
pub async fn cache_results(
&mut self,
json_results: String,
json_results: &str,
url: &str,
) -> Result<(), Box<dyn std::error::Error>> {
let hashed_url_string = Self::hash_url(url);
) -> Result<(), Report<PoolError>> {
self.current_connection = Default::default();
let hashed_url_string: &str = &self.hash_url(url);
// put results_json into cache
self.connection.set(&hashed_url_string, json_results)?;
let mut result: Result<(), RedisError> = self.connection_pool
[self.current_connection as usize]
.set_ex(hashed_url_string, json_results, 60)
.await;
// Set the TTL for the key to 60 seconds
self.connection
.expire::<String, u32>(hashed_url_string, 60)
.unwrap();
Ok(())
// Code to check whether the current connection being used is dropped with connection error
// or not. if it drops with the connection error then the current connection is replaced
// with a new connection from the pool which is then used to run the redis command then
// that connection is also checked whether it is dropped or not if it is not then the
// result is passed as a `Result` or else the same process repeats again and if all of the
// connections in the pool result in connection drop error then a custom pool error is
// returned.
loop {
match result {
Err(error) => match error.is_connection_dropped() {
true => {
self.current_connection += 1;
if self.current_connection == self.pool_size {
return Err(Report::new(
PoolError::PoolExhaustionWithConnectionDropError,
));
}
result = self.connection_pool[self.current_connection as usize]
.set_ex(hashed_url_string, json_results, 60)
.await;
continue;
}
false => return Err(Report::new(PoolError::RedisError(error))),
},
Ok(_) => return Ok(()),
}
}
}
}

37
src/cache/error.rs vendored Normal file
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@ -0,0 +1,37 @@
//! This module provides the error enum to handle different errors associated while requesting data from
//! the redis server using an async connection pool.
use std::fmt;
use redis::RedisError;
/// A custom error type used for handling redis async pool associated errors.
#[derive(Debug)]
pub enum PoolError {
/// This variant handles all errors related to `RedisError`,
RedisError(RedisError),
/// This variant handles the errors which occurs when all the connections
/// in the connection pool return a connection dropped redis error.
PoolExhaustionWithConnectionDropError,
}
impl fmt::Display for PoolError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
PoolError::RedisError(redis_error) => {
if let Some(detail) = redis_error.detail() {
write!(f, "{}", detail)
} else {
write!(f, "")
}
}
PoolError::PoolExhaustionWithConnectionDropError => {
write!(
f,
"Error all connections from the pool dropped with connection error"
)
}
}
}
}
impl error_stack::Context for PoolError {}

4
src/cache/mod.rs vendored
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@ -1 +1,5 @@
//! This module provides the modules which provide the functionality to cache the aggregated
//! results fetched and aggregated from the upstream search engines in a json format.
pub mod cacher;
pub mod error;

4
src/config/mod.rs
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@ -1,2 +1,4 @@
//! This module provides the modules which handles the functionality to parse the lua config
//! and convert the config options into rust readable form.
pub mod parser;
pub mod parser_models;

151
src/config/parser.rs
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@ -3,49 +3,40 @@
use crate::handler::paths::{file_path, FileType};
use super::parser_models::Style;
use crate::models::parser_models::{AggregatorConfig, RateLimiter, Style};
use log::LevelFilter;
use rlua::Lua;
use mlua::Lua;
use std::{collections::HashMap, fs, thread::available_parallelism};
/// A named struct which stores the parsed config file options.
///
/// # Fields
//
/// * `port` - It stores the parsed port number option on which the server should launch.
/// * `binding_ip` - It stores the parsed ip address option on which the server should launch
/// * `style` - It stores the theming options for the website.
/// * `redis_url` - It stores the redis connection url address on which the redis
/// client should connect.
/// * `aggregator` - It stores the option to whether enable or disable production use.
/// * `logging` - It stores the option to whether enable or disable logs.
/// * `debug` - It stores the option to whether enable or disable debug mode.
/// * `upstream_search_engines` - It stores all the engine names that were enabled by the user.
/// * `request_timeout` - It stores the time (secs) which controls the server request timeout.
/// * `threads` - It stores the number of threads which controls the app will use to run.
#[derive(Clone)]
pub struct Config {
/// It stores the parsed port number option on which the server should launch.
pub port: u16,
/// It stores the parsed ip address option on which the server should launch
pub binding_ip: String,
/// It stores the theming options for the website.
pub style: Style,
/// It stores the redis connection url address on which the redis
/// client should connect.
pub redis_url: String,
/// It stores the option to whether enable or disable production use.
pub aggregator: AggregatorConfig,
/// It stores the option to whether enable or disable logs.
pub logging: bool,
/// It stores the option to whether enable or disable debug mode.
pub debug: bool,
pub upstream_search_engines: Vec<crate::engines::engine_models::EngineHandler>,
/// It stores all the engine names that were enabled by the user.
pub upstream_search_engines: Vec<crate::models::engine_models::EngineHandler>,
/// It stores the time (secs) which controls the server request timeout.
pub request_timeout: u8,
/// It stores the number of threads which controls the app will use to run.
pub threads: u8,
}
/// Configuration options for the aggregator.
///
/// # Fields
///
/// * `random_delay` - It stores the option to whether enable or disable random delays between
/// requests.
#[derive(Clone)]
pub struct AggregatorConfig {
pub random_delay: bool,
/// It stores configuration options for the ratelimiting middleware.
pub rate_limiter: RateLimiter,
/// It stores the level of safe search to be used for restricting content in the
/// search results.
pub safe_search: u8,
}
impl Config {
@ -63,58 +54,80 @@ impl Config {
/// or io error if the config.lua file doesn't exists otherwise it returns a newly constructed
/// Config struct with all the parsed config options from the parsed config file.
pub fn parse(logging_initialized: bool) -> Result<Self, Box<dyn std::error::Error>> {
Lua::new().context(|context| -> Result<Self, Box<dyn std::error::Error>> {
let globals = context.globals();
let lua = Lua::new();
let globals = lua.globals();
context
.load(&fs::read_to_string(file_path(FileType::Config)?)?)
.exec()?;
lua.load(&fs::read_to_string(file_path(FileType::Config)?)?)
.exec()?;
let parsed_threads: u8 = globals.get::<_, u8>("threads")?;
let parsed_threads: u8 = globals.get::<_, u8>("threads")?;
let debug: bool = globals.get::<_, bool>("debug")?;
let logging:bool= globals.get::<_, bool>("logging")?;
let debug: bool = globals.get::<_, bool>("debug")?;
let logging: bool = globals.get::<_, bool>("logging")?;
if !logging_initialized {
set_logging_level(debug, logging);
if !logging_initialized {
set_logging_level(debug, logging);
}
let threads: u8 = if parsed_threads == 0 {
let total_num_of_threads: usize = available_parallelism()?.get() / 2;
log::error!(
"Config Error: The value of `threads` option should be a non zero positive integer"
);
log::error!("Falling back to using {} threads", total_num_of_threads);
total_num_of_threads as u8
} else {
parsed_threads
};
let rate_limiter = globals.get::<_, HashMap<String, u8>>("rate_limiter")?;
let parsed_safe_search: u8 = globals.get::<_, u8>("safe_search")?;
let safe_search: u8 = match parsed_safe_search {
0..=4 => parsed_safe_search,
_ => {
log::error!("Config Error: The value of `safe_search` option should be a non zero positive integer from 0 to 4.");
log::error!("Falling back to using the value `1` for the option");
1
}
};
let threads: u8 = if parsed_threads == 0 {
let total_num_of_threads: usize = available_parallelism()?.get() / 2;
log::error!("Config Error: The value of `threads` option should be a non zero positive integer");
log::error!("Falling back to using {} threads", total_num_of_threads);
total_num_of_threads as u8
} else {
parsed_threads
};
Ok(Config {
port: globals.get::<_, u16>("port")?,
binding_ip: globals.get::<_, String>("binding_ip")?,
style: Style::new(
globals.get::<_, String>("theme")?,
globals.get::<_, String>("colorscheme")?,
),
redis_url: globals.get::<_, String>("redis_url")?,
aggregator: AggregatorConfig {
random_delay: globals.get::<_, bool>("production_use")?,
},
logging,
debug,
upstream_search_engines: globals
.get::<_, HashMap<String, bool>>("upstream_search_engines")?
.into_iter()
.filter_map(|(key, value)| value.then_some(key))
.filter_map(|engine| crate::engines::engine_models::EngineHandler::new(&engine))
.collect(),
request_timeout: globals.get::<_, u8>("request_timeout")?,
threads,
})
Ok(Config {
port: globals.get::<_, u16>("port")?,
binding_ip: globals.get::<_, String>("binding_ip")?,
style: Style::new(
globals.get::<_, String>("theme")?,
globals.get::<_, String>("colorscheme")?,
),
redis_url: globals.get::<_, String>("redis_url")?,
aggregator: AggregatorConfig {
random_delay: globals.get::<_, bool>("production_use")?,
},
logging,
debug,
upstream_search_engines: globals
.get::<_, HashMap<String, bool>>("upstream_search_engines")?
.into_iter()
.filter_map(|(key, value)| value.then_some(key))
.filter_map(|engine| crate::models::engine_models::EngineHandler::new(&engine))
.collect(),
request_timeout: globals.get::<_, u8>("request_timeout")?,
threads,
rate_limiter: RateLimiter {
number_of_requests: rate_limiter["number_of_requests"],
time_limit: rate_limiter["time_limit"],
},
safe_search,
})
}
}
/// a helper function that sets the proper logging level
///
/// # Arguments
///
/// * `debug` - It takes the option to whether enable or disable debug mode.
/// * `logging` - It takes the option to whether enable or disable logs.
fn set_logging_level(debug: bool, logging: bool) {
if let Ok(pkg_env_var) = std::env::var("PKG_ENV") {
if pkg_env_var.to_lowercase() == "dev" {

83
src/engines/duckduckgo.rs
View File

@ -4,14 +4,14 @@
use std::collections::HashMap;
use reqwest::header::{HeaderMap, CONTENT_TYPE, COOKIE, REFERER, USER_AGENT};
use reqwest::header::HeaderMap;
use scraper::{Html, Selector};
use crate::results::aggregation_models::SearchResult;
use crate::models::aggregation_models::SearchResult;
use super::engine_models::{EngineError, SearchEngine};
use crate::models::engine_models::{EngineError, SearchEngine};
use error_stack::{IntoReport, Report, Result, ResultExt};
use error_stack::{Report, Result, ResultExt};
/// A new DuckDuckGo engine type defined in-order to implement the `SearchEngine` trait which allows to
/// reduce code duplication as well as allows to create vector of different search engines easily.
@ -19,30 +19,13 @@ pub struct DuckDuckGo;
#[async_trait::async_trait]
impl SearchEngine for DuckDuckGo {
/// This function scrapes results from the upstream engine duckduckgo and puts all the scraped
/// results like title, visiting_url (href in html),engine (from which engine it was fetched from)
/// and description in a RawSearchResult and then adds that to HashMap whose keys are url and
/// values are RawSearchResult struct and then returns it within a Result enum.
///
/// # Arguments
///
/// * `query` - Takes the user provided query to query to the upstream search engine with.
/// * `page` - Takes an u32 as an argument.
/// * `user_agent` - Takes a random user agent string as an argument.
/// * `request_timeout` - Takes a time (secs) as a value which controls the server request timeout.
///
/// # Errors
///
/// Returns an `EngineErrorKind` if the user is not connected to the internet or if their is failure to
/// reach the above `upstream search engine` page or if the `upstream search engine` is unable to
/// provide results for the requested search query and also returns error if the scraping selector
/// or HeaderMap fails to initialize.
async fn results(
&self,
query: String,
query: &str,
page: u32,
user_agent: String,
user_agent: &str,
request_timeout: u8,
_safe_search: u8,
) -> Result<HashMap<String, SearchResult>, EngineError> {
// Page number can be missing or empty string and so appropriate handling is required
// so that upstream server recieves valid page number.
@ -61,38 +44,19 @@ impl SearchEngine for DuckDuckGo {
};
// initializing HeaderMap and adding appropriate headers.
let mut header_map = HeaderMap::new();
header_map.insert(
USER_AGENT,
user_agent
.parse()
.into_report()
.change_context(EngineError::UnexpectedError)?,
);
header_map.insert(
REFERER,
"https://google.com/"
.parse()
.into_report()
.change_context(EngineError::UnexpectedError)?,
);
header_map.insert(
CONTENT_TYPE,
"application/x-www-form-urlencoded"
.parse()
.into_report()
.change_context(EngineError::UnexpectedError)?,
);
header_map.insert(
COOKIE,
"kl=wt-wt"
.parse()
.into_report()
.change_context(EngineError::UnexpectedError)?,
);
let header_map = HeaderMap::try_from(&HashMap::from([
("USER_AGENT".to_string(), user_agent.to_string()),
("REFERER".to_string(), "https://google.com/".to_string()),
(
"CONTENT_TYPE".to_string(),
"application/x-www-form-urlencoded".to_string(),
),
("COOKIE".to_string(), "kl=wt-wt".to_string()),
]))
.change_context(EngineError::UnexpectedError)?;
let document: Html = Html::parse_document(
&DuckDuckGo::fetch_html_from_upstream(self, url, header_map, request_timeout).await?,
&DuckDuckGo::fetch_html_from_upstream(self, &url, header_map, request_timeout).await?,
);
let no_result: Selector = Selector::parse(".no-results")
@ -126,8 +90,7 @@ impl SearchEngine for DuckDuckGo {
.next()
.unwrap()
.inner_html()
.trim()
.to_string(),
.trim(),
format!(
"https://{}",
result
@ -136,15 +99,15 @@ impl SearchEngine for DuckDuckGo {
.unwrap()
.inner_html()
.trim()
),
)
.as_str(),
result
.select(&result_desc)
.next()
.unwrap()
.inner_html()
.trim()
.to_string(),
vec!["duckduckgo".to_string()],
.trim(),
&["duckduckgo"],
)
})
.map(|search_result| (search_result.url.clone(), search_result))

109
src/engines/engine_models.rs
View File

@ -1,109 +0,0 @@
//! This module provides the error enum to handle different errors associated while requesting data from
//! the upstream search engines with the search query provided by the user.
use crate::results::aggregation_models::SearchResult;
use error_stack::{IntoReport, Result, ResultExt};
use std::{collections::HashMap, fmt, time::Duration};
/// A custom error type used for handle engine associated errors.
///
/// This enum provides variants three different categories of errors:
/// * `RequestError` - This variant handles all request related errors like forbidden, not found,
/// etc.
/// * `EmptyResultSet` - This variant handles the not results found error provide by the upstream
/// search engines.
/// * `UnexpectedError` - This variant handles all the errors which are unexpected or occur rarely
/// and are errors mostly related to failure in initialization of HeaderMap, Selector errors and
/// all other errors occurring within the code handling the `upstream search engines`.
#[derive(Debug)]
pub enum EngineError {
EmptyResultSet,
RequestError,
UnexpectedError,
}
impl fmt::Display for EngineError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
EngineError::EmptyResultSet => {
write!(f, "The upstream search engine returned an empty result set")
}
EngineError::RequestError => {
write!(
f,
"Error occurred while requesting data from upstream search engine"
)
}
EngineError::UnexpectedError => {
write!(f, "An unexpected error occurred while processing the data")
}
}
}
}
impl error_stack::Context for EngineError {}
/// A trait to define common behavior for all search engines.
#[async_trait::async_trait]
pub trait SearchEngine: Sync + Send {
async fn fetch_html_from_upstream(
&self,
url: String,
header_map: reqwest::header::HeaderMap,
request_timeout: u8,
) -> Result<String, EngineError> {
// fetch the html from upstream search engine
Ok(reqwest::Client::new()
.get(url)
.timeout(Duration::from_secs(request_timeout as u64)) // Add timeout to request to avoid DDOSing the server
.headers(header_map) // add spoofed headers to emulate human behavior
.send()
.await
.into_report()
.change_context(EngineError::RequestError)?
.text()
.await
.into_report()
.change_context(EngineError::RequestError)?)
}
async fn results(
&self,
query: String,
page: u32,
user_agent: String,
request_timeout: u8,
) -> Result<HashMap<String, SearchResult>, EngineError>;
}
pub struct EngineHandler {
engine: Box<dyn SearchEngine>,
name: &'static str,
}
impl Clone for EngineHandler {
fn clone(&self) -> Self {
Self::new(self.name).unwrap()
}
}
impl EngineHandler {
/// parses an engine name into an engine handler, returns none if the engine is unknown
pub fn new(engine_name: &str) -> Option<Self> {
let engine: (&'static str, Box<dyn SearchEngine>) =
match engine_name.to_lowercase().as_str() {
"duckduckgo" => ("duckduckgo", Box::new(super::duckduckgo::DuckDuckGo)),
"searx" => ("searx", Box::new(super::searx::Searx)),
_ => return None,
};
Some(Self {
engine: engine.1,
name: engine.0,
})
}
pub fn into_name_engine(self) -> (&'static str, Box<dyn SearchEngine>) {
(self.name, self.engine)
}
}

6
src/engines/mod.rs
View File

@ -1,3 +1,7 @@
//! This module provides different modules which handles the functionlity to fetch results from the
//! upstream search engines based on user requested queries. Also provides different models to
//! provide a standard functions to be implemented for all the upstream search engine handling
//! code. Moreover, it also provides a custom error for the upstream search engine handling code.
pub mod duckduckgo;
pub mod engine_models;
pub mod searx;

88
src/engines/searx.rs
View File

@ -2,14 +2,13 @@
//! by querying the upstream searx search engine instance with user provided query and with a page
//! number if provided.
use reqwest::header::{HeaderMap, CONTENT_TYPE, COOKIE, REFERER, USER_AGENT};
use reqwest::header::HeaderMap;
use scraper::{Html, Selector};
use std::collections::HashMap;
use crate::results::aggregation_models::SearchResult;
use super::engine_models::{EngineError, SearchEngine};
use error_stack::{IntoReport, Report, Result, ResultExt};
use crate::models::aggregation_models::SearchResult;
use crate::models::engine_models::{EngineError, SearchEngine};
use error_stack::{Report, Result, ResultExt};
/// A new Searx engine type defined in-order to implement the `SearchEngine` trait which allows to
/// reduce code duplication as well as allows to create vector of different search engines easily.
@ -17,66 +16,40 @@ pub struct Searx;
#[async_trait::async_trait]
impl SearchEngine for Searx {
/// This function scrapes results from the upstream engine duckduckgo and puts all the scraped
/// results like title, visiting_url (href in html),engine (from which engine it was fetched from)
/// and description in a RawSearchResult and then adds that to HashMap whose keys are url and
/// values are RawSearchResult struct and then returns it within a Result enum.
///
/// # Arguments
///
/// * `query` - Takes the user provided query to query to the upstream search engine with.
/// * `page` - Takes an u32 as an argument.
/// * `user_agent` - Takes a random user agent string as an argument.
/// * `request_timeout` - Takes a time (secs) as a value which controls the server request timeout.
///
/// # Errors
///
/// Returns an `EngineErrorKind` if the user is not connected to the internet or if their is failure to
/// reach the above `upstream search engine` page or if the `upstream search engine` is unable to
/// provide results for the requested search query and also returns error if the scraping selector
/// or HeaderMap fails to initialize.
async fn results(
&self,
query: String,
query: &str,
page: u32,
user_agent: String,
user_agent: &str,
request_timeout: u8,
mut safe_search: u8,
) -> Result<HashMap<String, SearchResult>, EngineError> {
// Page number can be missing or empty string and so appropriate handling is required
// so that upstream server recieves valid page number.
if safe_search == 3 {
safe_search = 2;
};
let url: String = match page {
0 | 1 => format!("https://searx.work/search?q={query}&pageno=1"),
_ => format!("https://searx.work/search?q={query}&pageno={page}"),
0 | 1 => {
format!("https://searx.work/search?q={query}&pageno=1&safesearch={safe_search}")
}
_ => format!(
"https://searx.work/search?q={query}&pageno={page}&safesearch={safe_search}"
),
};
// initializing headers and adding appropriate headers.
let mut header_map = HeaderMap::new();
header_map.insert(
USER_AGENT,
user_agent
.parse()
.into_report()
.change_context(EngineError::UnexpectedError)?,
);
header_map.insert(
REFERER,
"https://google.com/"
.parse()
.into_report()
.change_context(EngineError::UnexpectedError)?,
);
header_map.insert(
CONTENT_TYPE,
"application/x-www-form-urlencoded"
.parse()
.into_report()
.change_context(EngineError::UnexpectedError)?,
);
header_map.insert(COOKIE, "categories=general; language=auto; locale=en; autocomplete=duckduckgo; image_proxy=1; method=POST; safesearch=2; theme=simple; results_on_new_tab=1; doi_resolver=oadoi.org; simple_style=auto; center_alignment=1; query_in_title=1; infinite_scroll=0; disabled_engines=; enabled_engines=\"archive is__general\\054yep__general\\054curlie__general\\054currency__general\\054ddg definitions__general\\054wikidata__general\\054duckduckgo__general\\054tineye__general\\054lingva__general\\054startpage__general\\054yahoo__general\\054wiby__general\\054marginalia__general\\054alexandria__general\\054wikibooks__general\\054wikiquote__general\\054wikisource__general\\054wikiversity__general\\054wikivoyage__general\\054dictzone__general\\054seznam__general\\054mojeek__general\\054naver__general\\054wikimini__general\\054brave__general\\054petalsearch__general\\054goo__general\"; disabled_plugins=; enabled_plugins=\"searx.plugins.hostname_replace\\054searx.plugins.oa_doi_rewrite\\054searx.plugins.vim_hotkeys\"; tokens=; maintab=on; enginetab=on".parse().into_report().change_context(EngineError::UnexpectedError)?);
let header_map = HeaderMap::try_from(&HashMap::from([
("USER_AGENT".to_string(), user_agent.to_string()),
("REFERER".to_string(), "https://google.com/".to_string()),
("CONTENT_TYPE".to_string(), "application/x-www-form-urlencoded".to_string()),
("COOKIE".to_string(), "categories=general; language=auto; locale=en; autocomplete=duckduckgo; image_proxy=1; method=POST; safesearch=2; theme=simple; results_on_new_tab=1; doi_resolver=oadoi.org; simple_style=auto; center_alignment=1; query_in_title=1; infinite_scroll=0; disabled_engines=; enabled_engines=\"archive is__general\\054yep__general\\054curlie__general\\054currency__general\\054ddg definitions__general\\054wikidata__general\\054duckduckgo__general\\054tineye__general\\054lingva__general\\054startpage__general\\054yahoo__general\\054wiby__general\\054marginalia__general\\054alexandria__general\\054wikibooks__general\\054wikiquote__general\\054wikisource__general\\054wikiversity__general\\054wikivoyage__general\\054dictzone__general\\054seznam__general\\054mojeek__general\\054naver__general\\054wikimini__general\\054brave__general\\054petalsearch__general\\054goo__general\"; disabled_plugins=; enabled_plugins=\"searx.plugins.hostname_replace\\054searx.plugins.oa_doi_rewrite\\054searx.plugins.vim_hotkeys\"; tokens=; maintab=on; enginetab=on".to_string())
]))
.change_context(EngineError::UnexpectedError)?;
let document: Html = Html::parse_document(
&Searx::fetch_html_from_upstream(self, url, header_map, request_timeout).await?,
&Searx::fetch_html_from_upstream(self, &url, header_map, request_timeout).await?,
);
let no_result: Selector = Selector::parse("#urls>.dialog-error>p")
@ -117,24 +90,21 @@ impl SearchEngine for Searx {
.next()
.unwrap()
.inner_html()
.trim()
.to_string(),
.trim(),
result
.select(&result_url)
.next()
.unwrap()
.value()
.attr("href")
.unwrap()
.to_string(),
.unwrap(),
result
.select(&result_desc)
.next()
.unwrap()
.inner_html()
.trim()
.to_string(),
vec!["searx".to_string()],
.trim(),
&["searx"],
)
})
.map(|search_result| (search_result.url.clone(), search_result))

4
src/handler/mod.rs
View File

@ -1 +1,5 @@
//! This module provides modules which provide the functionality to handle paths for different
//! files present on different paths and provide one appropriate path on which it is present and
//! can be used.
pub mod paths;

158
src/handler/paths.rs
View File

@ -4,108 +4,116 @@
use std::collections::HashMap;
use std::io::Error;
use std::path::Path;
use std::sync::OnceLock;
// ------- Constants --------
static PUBLIC_DIRECTORY_NAME: &str = "public";
static COMMON_DIRECTORY_NAME: &str = "websurfx";
static CONFIG_FILE_NAME: &str = "config.lua";
static ALLOWLIST_FILE_NAME: &str = "allowlist.txt";
static BLOCKLIST_FILE_NAME: &str = "blocklist.txt";
/// The constant holding the name of the theme folder.
const PUBLIC_DIRECTORY_NAME: &str = "public";
/// The constant holding the name of the common folder.
const COMMON_DIRECTORY_NAME: &str = "websurfx";
/// The constant holding the name of the config file.
const CONFIG_FILE_NAME: &str = "config.lua";
/// The constant holding the name of the AllowList text file.
const ALLOWLIST_FILE_NAME: &str = "allowlist.txt";
/// The constant holding the name of the BlockList text file.
const BLOCKLIST_FILE_NAME: &str = "blocklist.txt";
/// An enum type which provides different variants to handle paths for various files/folders.
#[derive(Hash, PartialEq, Eq, Debug)]
pub enum FileType {
/// This variant handles all the paths associated with the config file.
Config,
/// This variant handles all the paths associated with the Allowlist text file.
AllowList,
/// This variant handles all the paths associated with the BlockList text file.
BlockList,
/// This variant handles all the paths associated with the public folder (Theme folder).
Theme,
}
static FILE_PATHS_FOR_DIFF_FILE_TYPES: once_cell::sync::Lazy<HashMap<FileType, Vec<String>>> =
once_cell::sync::Lazy::new(|| {
HashMap::from([
(
FileType::Config,
vec![
format!(
"{}/.config/{}/{}",
std::env::var("HOME").unwrap(),
COMMON_DIRECTORY_NAME,
CONFIG_FILE_NAME
),
format!("/etc/xdg/{}/{}", COMMON_DIRECTORY_NAME, CONFIG_FILE_NAME),
format!("./{}/{}", COMMON_DIRECTORY_NAME, CONFIG_FILE_NAME),
],
),
(
FileType::Theme,
vec![
format!("/opt/websurfx/{}/", PUBLIC_DIRECTORY_NAME),
format!("./{}/", PUBLIC_DIRECTORY_NAME),
],
),
(
FileType::AllowList,
vec![
format!(
"{}/.config/{}/{}",
std::env::var("HOME").unwrap(),
COMMON_DIRECTORY_NAME,
ALLOWLIST_FILE_NAME
),
format!("/etc/xdg/{}/{}", COMMON_DIRECTORY_NAME, ALLOWLIST_FILE_NAME),
format!("./{}/{}", COMMON_DIRECTORY_NAME, ALLOWLIST_FILE_NAME),
],
),
(
FileType::BlockList,
vec![
format!(
"{}/.config/{}/{}",
std::env::var("HOME").unwrap(),
COMMON_DIRECTORY_NAME,
BLOCKLIST_FILE_NAME
),
format!("/etc/xdg/{}/{}", COMMON_DIRECTORY_NAME, BLOCKLIST_FILE_NAME),
format!("./{}/{}", COMMON_DIRECTORY_NAME, BLOCKLIST_FILE_NAME),
],
),
])
});
/// A static variable which stores the different filesystem paths for various file/folder types.
static FILE_PATHS_FOR_DIFF_FILE_TYPES: OnceLock<HashMap<FileType, Vec<String>>> = OnceLock::new();
/// A helper function which returns an appropriate config file path checking if the config
/// file exists on that path.
/// A function which returns an appropriate path for thr provided file type by checking if the path
/// for the given file type exists on that path.
///
/// # Error
///
/// Returns a `config file not found!!` error if the config file is not present under following
/// paths which are:
/// 1. `~/.config/websurfx/` if it not present here then it fallbacks to the next one (2)
/// 2. `/etc/xdg/websurfx/config.lua` if it is not present here then it fallbacks to the next
/// one (3).
/// 3. `websurfx/` (under project folder ( or codebase in other words)) if it is not present
/// here then it returns an error as mentioned above.
/// A function which returns an appropriate theme directory path checking if the theme
/// directory exists on that path.
/// Returns a `<File Name> folder/file not found!!` error if the give file_type folder/file is not
/// present on the path on which it is being tested.
///
/// # Error
/// # Example
///
/// If this function is give the file_type of Theme variant then the theme folder is checked by the
/// following steps:
///
/// Returns a `Theme (public) folder not found!!` error if the theme folder is not present under following
/// paths which are:
/// 1. `/opt/websurfx` if it not present here then it fallbacks to the next one (2)
/// 2. Under project folder ( or codebase in other words) if it is not present
/// here then it returns an error as mentioned above.
pub fn file_path(file_type: FileType) -> Result<String, Error> {
let file_path = FILE_PATHS_FOR_DIFF_FILE_TYPES.get(&file_type).unwrap();
pub fn file_path(file_type: FileType) -> Result<&'static str, Error> {
let file_path: &Vec<String> = FILE_PATHS_FOR_DIFF_FILE_TYPES
.get_or_init(|| {
HashMap::from([
(
FileType::Config,
vec![
format!(
"{}/.config/{}/{}",
std::env::var("HOME").unwrap(),
COMMON_DIRECTORY_NAME,
CONFIG_FILE_NAME
),
format!("/etc/xdg/{}/{}", COMMON_DIRECTORY_NAME, CONFIG_FILE_NAME),
format!("./{}/{}", COMMON_DIRECTORY_NAME, CONFIG_FILE_NAME),
],
),
(
FileType::Theme,
vec![
format!("/opt/websurfx/{}/", PUBLIC_DIRECTORY_NAME),
format!("./{}/", PUBLIC_DIRECTORY_NAME),
],
),
(
FileType::AllowList,
vec![
format!(
"{}/.config/{}/{}",
std::env::var("HOME").unwrap(),
COMMON_DIRECTORY_NAME,
ALLOWLIST_FILE_NAME
),
format!("/etc/xdg/{}/{}", COMMON_DIRECTORY_NAME, ALLOWLIST_FILE_NAME),
format!("./{}/{}", COMMON_DIRECTORY_NAME, ALLOWLIST_FILE_NAME),
],
),
(
FileType::BlockList,
vec![
format!(
"{}/.config/{}/{}",
std::env::var("HOME").unwrap(),
COMMON_DIRECTORY_NAME,
BLOCKLIST_FILE_NAME
),
format!("/etc/xdg/{}/{}", COMMON_DIRECTORY_NAME, BLOCKLIST_FILE_NAME),
format!("./{}/{}", COMMON_DIRECTORY_NAME, BLOCKLIST_FILE_NAME),
],
),
])
})
.get(&file_type)
.unwrap();
for (idx, _) in file_path.iter().enumerate() {
if Path::new(file_path[idx].as_str()).exists() {
return Ok(file_path[idx].clone());
return Ok(std::mem::take(&mut &*file_path[idx]));
}
}
// if no of the configs above exist, return error
Err(Error::new(
std::io::ErrorKind::NotFound,
format!("{:?} file not found!!", file_type),
format!("{:?} file/folder not found!!", file_type),
))
}

35
src/lib.rs
View File

@ -1,19 +1,25 @@
//! This main library module provides the functionality to provide and handle the Tcp server
//! and register all the routes for the `websurfx` meta search engine website.
#![forbid(unsafe_code, clippy::panic)]
#![deny(missing_docs, clippy::missing_docs_in_private_items, clippy::perf)]
#![warn(clippy::cognitive_complexity, rust_2018_idioms)]
pub mod cache;
pub mod config;
pub mod engines;
pub mod handler;
pub mod models;
pub mod results;
pub mod server;
use std::net::TcpListener;
use crate::server::routes;
use crate::server::router;
use actix_cors::Cors;
use actix_files as fs;
use actix_governor::{Governor, GovernorConfigBuilder};
use actix_web::{dev::Server, http::header, middleware::Logger, web, App, HttpServer};
use config::parser::Config;
use handlebars::Handlebars;
@ -40,15 +46,15 @@ use handler::paths::{file_path, FileType};
/// let server = run(listener,config).expect("Failed to start server");
/// ```
pub fn run(listener: TcpListener, config: Config) -> std::io::Result<Server> {
let mut handlebars: Handlebars = Handlebars::new();
let mut handlebars: Handlebars<'_> = Handlebars::new();
let public_folder_path: String = file_path(FileType::Theme)?;
let public_folder_path: &str = file_path(FileType::Theme)?;
handlebars
.register_templates_directory(".html", format!("{}/templates", public_folder_path))
.unwrap();
let handlebars_ref: web::Data<Handlebars> = web::Data::new(handlebars);
let handlebars_ref: web::Data<Handlebars<'_>> = web::Data::new(handlebars);
let cloned_config_threads_opt: u8 = config.threads;
@ -64,10 +70,17 @@ pub fn run(listener: TcpListener, config: Config) -> std::io::Result<Server> {
]);
App::new()
.wrap(Logger::default()) // added logging middleware for logging.
.app_data(handlebars_ref.clone())
.app_data(web::Data::new(config.clone()))
.wrap(cors)
.wrap(Logger::default()) // added logging middleware for logging.
.wrap(Governor::new(
&GovernorConfigBuilder::default()
.per_second(config.rate_limiter.time_limit as u64)
.burst_size(config.rate_limiter.number_of_requests as u32)
.finish()
.unwrap(),
))
// Serve images and static files (css and js files).
.service(
fs::Files::new("/static", format!("{}/static", public_folder_path))
@ -77,12 +90,12 @@ pub fn run(listener: TcpListener, config: Config) -> std::io::Result<Server> {
fs::Files::new("/images", format!("{}/images", public_folder_path))
.show_files_listing(),
)
.service(routes::robots_data) // robots.txt
.service(routes::index) // index page
.service(routes::search) // search page
.service(routes::about) // about page
.service(routes::settings) // settings page
.default_service(web::route().to(routes::not_found)) // error page
.service(router::robots_data) // robots.txt
.service(router::index) // index page
.service(server::routes::search::search) // search page
.service(router::about) // about page
.service(router::settings) // settings page
.default_service(web::route().to(router::not_found)) // error page
})
.workers(cloned_config_threads_opt as usize)
// Start server on 127.0.0.1 with the user provided port number. for example 127.0.0.1:8080.

181
src/models/aggregation_models.rs Normal file
View File

@ -0,0 +1,181 @@
//! This module provides public models for handling, storing and serializing of search results
//! data scraped from the upstream search engines.
use serde::{Deserialize, Serialize};
use smallvec::SmallVec;
use super::{engine_models::EngineError, parser_models::Style};
/// A named struct to store the raw scraped search results scraped search results from the
/// upstream search engines before aggregating it.It derives the Clone trait which is needed
/// to write idiomatic rust using `Iterators`.
/// (href url in html in simple words).
#[derive(Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct SearchResult {
/// The title of the search result.
pub title: String,
/// The url which is accessed when clicked on it
pub url: String,
/// The description of the search result.
pub description: String,
/// The names of the upstream engines from which this results were provided.
pub engine: SmallVec<[String; 0]>,
}
impl SearchResult {
/// Constructs a new `RawSearchResult` with the given arguments needed for the struct.
///
/// # Arguments
///
/// * `title` - The title of the search result.
/// * `url` - The url which is accessed when clicked on it
/// (href url in html in simple words).
/// * `description` - The description of the search result.
/// * `engine` - The names of the upstream engines from which this results were provided.
pub fn new(title: &str, url: &str, description: &str, engine: &[&str]) -> Self {
SearchResult {
title: title.to_owned(),
url: url.to_owned(),
description: description.to_owned(),
engine: engine.iter().map(|name| name.to_string()).collect(),
}
}
/// A function which adds the engine name provided as a string into a vector of strings.
///
/// # Arguments
///
/// * `engine` - Takes an engine name provided as a String.
pub fn add_engines(&mut self, engine: &str) {
self.engine.push(engine.to_owned())
}
/// A function which returns the engine name stored from the struct as a string.
///
/// # Returns
///
/// An engine name stored as a string from the struct.
pub fn engine(&mut self) -> String {
std::mem::take(&mut self.engine[0])
}
}
/// A named struct that stores the error info related to the upstream search engines.
#[derive(Serialize, Deserialize, Clone)]
pub struct EngineErrorInfo {
/// It stores the error type which occured while fetching the result from a particular search
/// engine.
pub error: String,
/// It stores the name of the engine that failed to provide the requested search results.
pub engine: String,
/// It stores the name of the color to indicate whether how severe the particular error is (In
/// other words it indicates the severity of the error/issue).
pub severity_color: String,
}
impl EngineErrorInfo {
/// Constructs a new `SearchResult` with the given arguments needed for the struct.
///
/// # Arguments
///
/// * `error` - It takes the error type which occured while fetching the result from a particular
/// search engine.
/// * `engine` - It takes the name of the engine that failed to provide the requested search results.
pub fn new(error: &EngineError, engine: &str) -> Self {
Self {
error: match error {
EngineError::RequestError => "RequestError".to_owned(),
EngineError::EmptyResultSet => "EmptyResultSet".to_owned(),
EngineError::UnexpectedError => "UnexpectedError".to_owned(),
},
engine: engine.to_owned(),
severity_color: match error {
EngineError::RequestError => "green".to_owned(),
EngineError::EmptyResultSet => "blue".to_owned(),
EngineError::UnexpectedError => "red".to_owned(),
},
}
}
}
/// A named struct to store, serialize, deserialize the all the search results scraped and
/// aggregated from the upstream search engines.
/// `SearchResult` structs.
#[derive(Serialize, Deserialize, Default)]
#[serde(rename_all = "camelCase")]
pub struct SearchResults {
/// Stores the individual serializable `SearchResult` struct into a vector of
pub results: Vec<SearchResult>,
/// Stores the current pages search query `q` provided in the search url.
pub page_query: String,
/// Stores the theming options for the website.
pub style: Style,
/// Stores the information on which engines failed with their engine name
/// and the type of error that caused it.
pub engine_errors_info: Vec<EngineErrorInfo>,
/// Stores the flag option which holds the check value that the following
/// search query was disallowed when the safe search level set to 4 and it
/// was present in the `Blocklist` file.
pub disallowed: bool,
/// Stores the flag option which holds the check value that the following
/// search query was filtered when the safe search level set to 3 and it
/// was present in the `Blocklist` file.
pub filtered: bool,
}
impl SearchResults {
/// Constructs a new `SearchResult` with the given arguments needed for the struct.
///
/// # Arguments
///
/// * `results` - Takes an argument of individual serializable `SearchResult` struct
/// and stores it into a vector of `SearchResult` structs.
/// * `page_query` - Takes an argument of current page`s search query `q` provided in
/// the search url.
/// * `engine_errors_info` - Takes an array of structs which contains information regarding
/// which engines failed with their names, reason and their severity color name.
pub fn new(
results: Vec<SearchResult>,
page_query: &str,
engine_errors_info: &[EngineErrorInfo],
) -> Self {
Self {
results,
page_query: page_query.to_owned(),
style: Style::default(),
engine_errors_info: engine_errors_info.to_owned(),
disallowed: Default::default(),
filtered: Default::default(),
}
}
/// A setter function to add website style to the return search results.
pub fn add_style(&mut self, style: &Style) {
self.style = style.clone();
}
/// A setter function that sets disallowed to true.
pub fn set_disallowed(&mut self) {
self.disallowed = true;
}
/// A setter function to set the current page search query.
pub fn set_page_query(&mut self, page: &str) {
self.page_query = page.to_owned();
}
/// A setter function that sets the filtered to true.
pub fn set_filtered(&mut self) {
self.filtered = true;
}
/// A getter function that gets the value of `engine_errors_info`.
pub fn engine_errors_info(&mut self) -> Vec<EngineErrorInfo> {
std::mem::take(&mut self.engine_errors_info)
}
/// A getter function that gets the value of `results`.
pub fn results(&mut self) -> Vec<SearchResult> {
self.results.clone()
}
}

159
src/models/engine_models.rs Normal file
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@ -0,0 +1,159 @@
//! This module provides the error enum to handle different errors associated while requesting data from
//! the upstream search engines with the search query provided by the user.
use super::aggregation_models::SearchResult;
use error_stack::{Result, ResultExt};
use std::{collections::HashMap, fmt, time::Duration};
/// A custom error type used for handle engine associated errors.
#[derive(Debug)]
pub enum EngineError {
/// This variant handles all request related errors like forbidden, not found,
/// etc.
EmptyResultSet,
/// This variant handles the not results found error provide by the upstream
/// search engines.
RequestError,
/// This variant handles all the errors which are unexpected or occur rarely
/// and are errors mostly related to failure in initialization of HeaderMap,
/// Selector errors and all other errors occurring within the code handling
/// the `upstream search engines`.
UnexpectedError,
}
impl fmt::Display for EngineError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
EngineError::EmptyResultSet => {
write!(f, "The upstream search engine returned an empty result set")
}
EngineError::RequestError => {
write!(
f,
"Error occurred while requesting data from upstream search engine"
)
}
EngineError::UnexpectedError => {
write!(f, "An unexpected error occurred while processing the data")
}
}
}
}
impl error_stack::Context for EngineError {}
/// A trait to define common behavior for all search engines.
#[async_trait::async_trait]
pub trait SearchEngine: Sync + Send {
/// This helper function fetches/requests the search results from the upstream search engine in
/// an html form.
///
/// # Arguments
///
/// * `url` - It takes the url of the upstream search engine with the user requested search
/// query appended in the search parameters.
/// * `header_map` - It takes the http request headers to be sent to the upstream engine in
/// order to prevent being detected as a bot. It takes the header as a HeaderMap type.
/// * `request_timeout` - It takes the request timeout value as seconds which is used to limit
/// the amount of time for each request to remain connected when until the results can be provided
/// by the upstream engine.
///
/// # Error
///
/// It returns the html data as a string if the upstream engine provides the data as expected
/// otherwise it returns a custom `EngineError`.
async fn fetch_html_from_upstream(
&self,
url: &str,
header_map: reqwest::header::HeaderMap,
request_timeout: u8,
) -> Result<String, EngineError> {
// fetch the html from upstream search engine
Ok(reqwest::Client::new()
.get(url)
.timeout(Duration::from_secs(request_timeout as u64)) // Add timeout to request to avoid DDOSing the server
.headers(header_map) // add spoofed headers to emulate human behavior
.send()
.await
.change_context(EngineError::RequestError)?
.text()
.await
.change_context(EngineError::RequestError)?)
}
/// This function scrapes results from the upstream engine and puts all the scraped results like
/// title, visiting_url (href in html),engine (from which engine it was fetched from) and description
/// in a RawSearchResult and then adds that to HashMap whose keys are url and values are RawSearchResult
/// struct and then returns it within a Result enum.
///
/// # Arguments
///
/// * `query` - Takes the user provided query to query to the upstream search engine with.
/// * `page` - Takes an u32 as an argument.
/// * `user_agent` - Takes a random user agent string as an argument.
/// * `request_timeout` - Takes a time (secs) as a value which controls the server request timeout.
///
/// # Errors
///
/// Returns an `EngineErrorKind` if the user is not connected to the internet or if their is failure to
/// reach the above `upstream search engine` page or if the `upstream search engine` is unable to
/// provide results for the requested search query and also returns error if the scraping selector
/// or HeaderMap fails to initialize.
async fn results(
&self,
query: &str,
page: u32,
user_agent: &str,
request_timeout: u8,
safe_search: u8,
) -> Result<HashMap<String, SearchResult>, EngineError>;
}
/// A named struct which stores the engine struct with the name of the associated engine.
pub struct EngineHandler {
/// It stores the engine struct wrapped in a box smart pointer as the engine struct implements
/// the `SearchEngine` trait.
engine: Box<dyn SearchEngine>,
/// It stores the name of the engine to which the struct is associated to.
name: &'static str,
}
impl Clone for EngineHandler {
fn clone(&self) -> Self {
Self::new(self.name).unwrap()
}
}
impl EngineHandler {
/// Parses an engine name into an engine handler.
///
/// # Arguments
///
/// * `engine_name` - It takes the name of the engine to which the struct was associated to.
///
/// # Returns
///
/// It returns an option either containing the value or a none if the engine is unknown
pub fn new(engine_name: &str) -> Option<Self> {
let engine: (&'static str, Box<dyn SearchEngine>) =
match engine_name.to_lowercase().as_str() {
"duckduckgo" => (
"duckduckgo",
Box::new(crate::engines::duckduckgo::DuckDuckGo),
),
"searx" => ("searx", Box::new(crate::engines::searx::Searx)),
_ => return None,
};
Some(Self {
engine: engine.1,
name: engine.0,
})
}
/// This function converts the EngineHandler type into a tuple containing the engine name and
/// the associated engine struct.
pub fn into_name_engine(self) -> (&'static str, Box<dyn SearchEngine>) {
(self.name, self.engine)
}
}

8
src/models/mod.rs Normal file
View File

@ -0,0 +1,8 @@
//! This module provides modules which in turn provides various models for aggregrating search
//! results, parsing config file, providing trait to standardize search engine handling code,
//! custom engine error for the search engine, etc.
pub mod aggregation_models;
pub mod engine_models;
pub mod parser_models;
pub mod server_models;

28
src/config/parser_models.rs → src/models/parser_models.rs
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@ -12,15 +12,12 @@ use serde::{Deserialize, Serialize};
/// order to allow the deserializing the json back to struct in aggregate function in
/// aggregator.rs and create a new struct out of it and then serialize it back to json and pass
/// it to the template files.
///
/// # Fields
//
/// * `theme` - It stores the parsed theme option used to set a theme for the website.
/// * `colorscheme` - It stores the parsed colorscheme option used to set a colorscheme for the
/// theme being used.
#[derive(Serialize, Deserialize, Clone)]
#[derive(Serialize, Deserialize, Clone, Default)]
pub struct Style {
/// It stores the parsed theme option used to set a theme for the website.
pub theme: String,
/// It stores the parsed colorscheme option used to set a colorscheme for the
/// theme being used.
pub colorscheme: String,
}
@ -36,3 +33,20 @@ impl Style {
Style { theme, colorscheme }
}
}
/// Configuration options for the aggregator.
#[derive(Clone)]
pub struct AggregatorConfig {
/// It stores the option to whether enable or disable random delays between
/// requests.
pub random_delay: bool,
}
/// Configuration options for the rate limiter middleware.
#[derive(Clone)]
pub struct RateLimiter {
/// The number of request that are allowed within a provided time limit.
pub number_of_requests: u8,
/// The time limit in which the quantity of requests that should be accepted.
pub time_limit: u8,
}

26
src/models/server_models.rs Normal file
View File

@ -0,0 +1,26 @@
//! This module provides the models to parse cookies and search parameters from the search
//! engine website.
use serde::Deserialize;
/// A named struct which deserializes all the user provided search parameters and stores them.
#[derive(Deserialize)]
pub struct SearchParams {
/// It stores the search parameter option `q` (or query in simple words)
/// of the search url.
pub q: Option<String>,
/// It stores the search parameter `page` (or pageno in simple words)
/// of the search url.
pub page: Option<u32>,
}
/// A named struct which is used to deserialize the cookies fetched from the client side.
#[allow(dead_code)]
#[derive(Deserialize)]
pub struct Cookie {
/// It stores the theme name used in the website.
pub theme: String,
/// It stores the colorscheme name used for the website theme.
pub colorscheme: String,
/// It stores the user selected upstream search engines selected from the UI.
pub engines: Vec<String>,
}

142
src/results/aggregation_models.rs
View File

@ -1,142 +0,0 @@
//! This module provides public models for handling, storing and serializing of search results
//! data scraped from the upstream search engines.
use serde::{Deserialize, Serialize};
use crate::{config::parser_models::Style, engines::engine_models::EngineError};
/// A named struct to store the raw scraped search results scraped search results from the
/// upstream search engines before aggregating it.It derives the Clone trait which is needed
/// to write idiomatic rust using `Iterators`.
///
/// # Fields
///
/// * `title` - The title of the search result.
/// * `url` - The url which is accessed when clicked on it
/// (href url in html in simple words).
/// * `description` - The description of the search result.
/// * `engine` - The names of the upstream engines from which this results were provided.
#[derive(Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct SearchResult {
pub title: String,
pub url: String,
pub description: String,
pub engine: Vec<String>,
}
impl SearchResult {
/// Constructs a new `RawSearchResult` with the given arguments needed for the struct.
///
/// # Arguments
///
/// * `title` - The title of the search result.
/// * `url` - The url which is accessed when clicked on it
/// (href url in html in simple words).
/// * `description` - The description of the search result.
/// * `engine` - The names of the upstream engines from which this results were provided.
pub fn new(title: String, url: String, description: String, engine: Vec<String>) -> Self {
SearchResult {
title,
url,
description,
engine,
}
}
/// A function which adds the engine name provided as a string into a vector of strings.
///
/// # Arguments
///
/// * `engine` - Takes an engine name provided as a String.
pub fn add_engines(&mut self, engine: String) {
self.engine.push(engine)
}
/// A function which returns the engine name stored from the struct as a string.
///
/// # Returns
///
/// An engine name stored as a string from the struct.
pub fn engine(self) -> String {
self.engine.get(0).unwrap().to_string()
}
}
///
#[derive(Serialize, Deserialize)]
pub struct EngineErrorInfo {
pub error: String,
pub engine: String,
pub severity_color: String,
}
impl EngineErrorInfo {
pub fn new(error: &EngineError, engine: String) -> Self {
Self {
error: match error {
EngineError::RequestError => String::from("RequestError"),
EngineError::EmptyResultSet => String::from("EmptyResultSet"),
EngineError::UnexpectedError => String::from("UnexpectedError"),
},
engine,
severity_color: match error {
EngineError::RequestError => String::from("green"),
EngineError::EmptyResultSet => String::from("blue"),
EngineError::UnexpectedError => String::from("red"),
},
}
}
}
/// A named struct to store, serialize, deserialize the all the search results scraped and
/// aggregated from the upstream search engines.
///
/// # Fields
///
/// * `results` - Stores the individual serializable `SearchResult` struct into a vector of
/// `SearchResult` structs.
/// * `page_query` - Stores the current pages search query `q` provided in the search url.
/// * `style` - Stores the theming options for the website.
/// * `engine_errors_info` - Stores the information on which engines failed with their engine name
/// and the type of error that caused it.
/// * `empty_result_set` - Stores a boolean which indicates that no engines gave a result for the
/// given search query.
#[derive(Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct SearchResults {
pub results: Vec<SearchResult>,
pub page_query: String,
pub style: Style,
pub engine_errors_info: Vec<EngineErrorInfo>,
}
impl SearchResults {
/// Constructs a new `SearchResult` with the given arguments needed for the struct.
///
/// # Arguments
///
/// * `results` - Takes an argument of individual serializable `SearchResult` struct
/// and stores it into a vector of `SearchResult` structs.
/// * `page_query` - Takes an argument of current page`s search query `q` provided in
/// the search url.
/// * `empty_result_set` - Takes a boolean which indicates that no engines gave a result for the
/// given search query.
pub fn new(
results: Vec<SearchResult>,
page_query: String,
engine_errors_info: Vec<EngineErrorInfo>,
) -> Self {
SearchResults {
results,
page_query,
style: Style::new("".to_string(), "".to_string()),
engine_errors_info,
}
}
/// A setter function to add website style to the return search results.
pub fn add_style(&mut self, style: Style) {
self.style = style;
}
}

144
src/results/aggregator.rs
View File

@ -1,27 +1,23 @@
//! This module provides the functionality to scrape and gathers all the results from the upstream
//! search engines and then removes duplicate results.
use super::user_agent::random_user_agent;
use crate::handler::paths::{file_path, FileType};
use crate::models::{
aggregation_models::{EngineErrorInfo, SearchResult, SearchResults},
engine_models::{EngineError, EngineHandler},
};
use error_stack::Report;
use rand::Rng;
use regex::Regex;
use std::{
collections::HashMap,
io::{BufReader, Read},
time::Duration,
};
use super::{
aggregation_models::{EngineErrorInfo, SearchResult, SearchResults},
user_agent::random_user_agent,
};
use error_stack::Report;
use rand::Rng;
use regex::Regex;
use std::{fs::File, io::BufRead};
use tokio::task::JoinHandle;
use crate::{
engines::engine_models::{EngineError, EngineHandler},
handler::paths::{file_path, FileType},
};
/// Aliases for long type annotations
type FutureVec = Vec<JoinHandle<Result<HashMap<String, SearchResult>, Report<EngineError>>>>;
@ -64,14 +60,15 @@ type FutureVec = Vec<JoinHandle<Result<HashMap<String, SearchResult>, Report<Eng
/// function in either `searx` or `duckduckgo` or both otherwise returns a `SearchResults struct`
/// containing appropriate values.
pub async fn aggregate(
query: String,
query: &str,
page: u32,
random_delay: bool,
debug: bool,
upstream_search_engines: Vec<EngineHandler>,
upstream_search_engines: &[EngineHandler],
request_timeout: u8,
safe_search: u8,
) -> Result<SearchResults, Box<dyn std::error::Error>> {
let user_agent: String = random_user_agent();
let user_agent: &str = random_user_agent();
// Add a random delay before making the request.
if random_delay || !debug {
@ -80,19 +77,24 @@ pub async fn aggregate(
tokio::time::sleep(Duration::from_secs(delay_secs)).await;
}
let mut names: Vec<&str> = vec![];
let mut names: Vec<&str> = Vec::with_capacity(0);
// create tasks for upstream result fetching
let mut tasks: FutureVec = FutureVec::new();
for engine_handler in upstream_search_engines {
let (name, search_engine) = engine_handler.into_name_engine();
let (name, search_engine) = engine_handler.to_owned().into_name_engine();
names.push(name);
let query: String = query.clone();
let user_agent: String = user_agent.clone();
let query: String = query.to_owned();
tasks.push(tokio::spawn(async move {
search_engine
.results(query, page, user_agent.clone(), request_timeout)
.results(
&query,
page,
user_agent.clone(),
request_timeout,
safe_search,
)
.await
}));
}
@ -110,7 +112,7 @@ pub async fn aggregate(
let mut result_map: HashMap<String, SearchResult> = HashMap::new();
let mut engine_errors_info: Vec<EngineErrorInfo> = Vec::new();
let mut handle_error = |error: Report<EngineError>, engine_name: String| {
let mut handle_error = |error: &Report<EngineError>, engine_name: &'static str| {
log::error!("Engine Error: {:?}", error);
engine_errors_info.push(EngineErrorInfo::new(
error.downcast_ref::<EngineError>().unwrap(),
@ -120,7 +122,7 @@ pub async fn aggregate(
for _ in 0..responses.len() {
let response = responses.pop().unwrap();
let engine = names.pop().unwrap().to_string();
let engine = names.pop().unwrap();
if result_map.is_empty() {
match response {
@ -128,7 +130,7 @@ pub async fn aggregate(
result_map = results.clone();
}
Err(error) => {
handle_error(error, engine);
handle_error(&error, engine);
}
}
continue;
@ -140,39 +142,37 @@ pub async fn aggregate(
result_map
.entry(key)
.and_modify(|result| {
result.add_engines(engine.clone());
result.add_engines(engine);
})
.or_insert_with(|| -> SearchResult { value });
});
}
Err(error) => {
handle_error(error, engine);
handle_error(&error, engine);
}
}
}
let mut blacklist_map: HashMap<String, SearchResult> = HashMap::new();
filter_with_lists(
&mut result_map,
&mut blacklist_map,
&file_path(FileType::BlockList)?,
)?;
if safe_search >= 3 {
let mut blacklist_map: HashMap<String, SearchResult> = HashMap::new();
filter_with_lists(
&mut result_map,
&mut blacklist_map,
file_path(FileType::BlockList)?,
)?;
filter_with_lists(
&mut blacklist_map,
&mut result_map,
&file_path(FileType::AllowList)?,
)?;
filter_with_lists(
&mut blacklist_map,
&mut result_map,
file_path(FileType::AllowList)?,
)?;
drop(blacklist_map);
drop(blacklist_map);
}
let results: Vec<SearchResult> = result_map.into_values().collect();
Ok(SearchResults::new(
results,
query.to_string(),
engine_errors_info,
))
Ok(SearchResults::new(results, query, &engine_errors_info))
}
/// Filters a map of search results using a list of regex patterns.
@ -194,7 +194,7 @@ pub fn filter_with_lists(
let mut reader = BufReader::new(File::open(file_path)?);
for line in reader.by_ref().lines() {
let re = Regex::new(&line?)?;
let re = Regex::new(line?.trim())?;
// Iterate over each search result in the map and check if it matches the regex pattern
for (url, search_result) in map_to_be_filtered.clone().into_iter() {
@ -203,7 +203,10 @@ pub fn filter_with_lists(
|| re.is_match(&search_result.description.to_lowercase())
{
// If the search result matches the regex pattern, move it from the original map to the resultant map
resultant_map.insert(url.clone(), map_to_be_filtered.remove(&url).unwrap());
resultant_map.insert(
url.to_owned(),
map_to_be_filtered.remove(&url.to_owned()).unwrap(),
);
}
}
}
@ -214,6 +217,7 @@ pub fn filter_with_lists(
#[cfg(test)]
mod tests {
use super::*;
use smallvec::smallvec;
use std::collections::HashMap;
use std::io::Write;
use tempfile::NamedTempFile;
@ -223,22 +227,22 @@ mod tests {
// Create a map of search results to filter
let mut map_to_be_filtered = HashMap::new();
map_to_be_filtered.insert(
"https://www.example.com".to_string(),
"https://www.example.com".to_owned(),
SearchResult {
title: "Example Domain".to_string(),
url: "https://www.example.com".to_string(),
title: "Example Domain".to_owned(),
url: "https://www.example.com".to_owned(),
description: "This domain is for use in illustrative examples in documents."
.to_string(),
engine: vec!["Google".to_string(), "Bing".to_string()],
.to_owned(),
engine: smallvec!["Google".to_owned(), "Bing".to_owned()],
},
);
map_to_be_filtered.insert(
"https://www.rust-lang.org/".to_string(),
"https://www.rust-lang.org/".to_owned(),
SearchResult {
title: "Rust Programming Language".to_string(),
url: "https://www.rust-lang.org/".to_string(),
description: "A systems programming language that runs blazingly fast, prevents segfaults, and guarantees thread safety.".to_string(),
engine: vec!["Google".to_string(), "DuckDuckGo".to_string()],
title: "Rust Programming Language".to_owned(),
url: "https://www.rust-lang.org/".to_owned(),
description: "A systems programming language that runs blazingly fast, prevents segfaults, and guarantees thread safety.".to_owned(),
engine: smallvec!["Google".to_owned(), "DuckDuckGo".to_owned()],
},
);
@ -267,22 +271,22 @@ mod tests {
fn test_filter_with_lists_wildcard() -> Result<(), Box<dyn std::error::Error>> {
let mut map_to_be_filtered = HashMap::new();
map_to_be_filtered.insert(
"https://www.example.com".to_string(),
"https://www.example.com".to_owned(),
SearchResult {
title: "Example Domain".to_string(),
url: "https://www.example.com".to_string(),
title: "Example Domain".to_owned(),
url: "https://www.example.com".to_owned(),
description: "This domain is for use in illustrative examples in documents."
.to_string(),
engine: vec!["Google".to_string(), "Bing".to_string()],
.to_owned(),
engine: smallvec!["Google".to_owned(), "Bing".to_owned()],
},
);
map_to_be_filtered.insert(
"https://www.rust-lang.org/".to_string(),
"https://www.rust-lang.org/".to_owned(),
SearchResult {
title: "Rust Programming Language".to_string(),
url: "https://www.rust-lang.org/".to_string(),
description: "A systems programming language that runs blazingly fast, prevents segfaults, and guarantees thread safety.".to_string(),
engine: vec!["Google".to_string(), "DuckDuckGo".to_string()],
title: "Rust Programming Language".to_owned(),
url: "https://www.rust-lang.org/".to_owned(),
description: "A systems programming language that runs blazingly fast, prevents segfaults, and guarantees thread safety.".to_owned(),
engine: smallvec!["Google".to_owned(), "DuckDuckGo".to_owned()],
},
);
@ -327,13 +331,13 @@ mod tests {
fn test_filter_with_lists_invalid_regex() {
let mut map_to_be_filtered = HashMap::new();
map_to_be_filtered.insert(
"https://www.example.com".to_string(),
"https://www.example.com".to_owned(),
SearchResult {
title: "Example Domain".to_string(),
url: "https://www.example.com".to_string(),
title: "Example Domain".to_owned(),
url: "https://www.example.com".to_owned(),
description: "This domain is for use in illustrative examples in documents."
.to_string(),
engine: vec!["Google".to_string(), "Bing".to_string()],
.to_owned(),
engine: smallvec!["Google".to_owned(), "Bing".to_owned()],
},
);

5
src/results/mod.rs
View File

@ -1,3 +1,6 @@
pub mod aggregation_models;
//! This module provides modules that handle the functionality to aggregate the fetched search
//! results from the upstream search engines and filters it if safe search is set to 3 or 4. Also,
//! provides various models to aggregate search results into a standardized form.
pub mod aggregator;
pub mod user_agent;

40
src/results/user_agent.rs
View File

@ -1,28 +1,34 @@
//! This module provides the functionality to generate random user agent string.
use std::sync::OnceLock;
use fake_useragent::{Browsers, UserAgents, UserAgentsBuilder};
static USER_AGENTS: once_cell::sync::Lazy<UserAgents> = once_cell::sync::Lazy::new(|| {
UserAgentsBuilder::new()
.cache(false)
.dir("/tmp")
.thread(1)
.set_browsers(
Browsers::new()
.set_chrome()
.set_safari()
.set_edge()
.set_firefox()
.set_mozilla(),
)
.build()
});
/// A static variable which stores the initially build `UserAgents` struct. So as it can be resused
/// again and again without the need of reinitializing the `UserAgents` struct.
static USER_AGENTS: OnceLock<UserAgents> = OnceLock::new();
/// A function to generate random user agent to improve privacy of the user.
///
/// # Returns
///
/// A randomly generated user agent string.
pub fn random_user_agent() -> String {
USER_AGENTS.random().to_string()
pub fn random_user_agent() -> &'static str {
USER_AGENTS
.get_or_init(|| {
UserAgentsBuilder::new()
.cache(false)
.dir("/tmp")
.thread(1)
.set_browsers(
Browsers::new()
.set_chrome()
.set_safari()
.set_edge()
.set_firefox()
.set_mozilla(),
)
.build()
})
.random()
}

6
src/server/mod.rs
View File

@ -1 +1,7 @@
//! This module provides modules that handle the functionality of handling different routes/paths
//! for the `websurfx` search engine website. Also it handles the parsing of search parameters in
//! the search route. Also, caches the next, current and previous search results in the search
//! routes with the help of the redis server.
pub mod router;
pub mod routes;

64
src/server/router.rs Normal file
View File

@ -0,0 +1,64 @@
//! This module provides the functionality to handle different routes of the `websurfx`
//! meta search engine website and provide appropriate response to each route/page
//! when requested.
use crate::{
config::parser::Config,
handler::paths::{file_path, FileType},
};
use actix_web::{get, web, HttpRequest, HttpResponse};
use handlebars::Handlebars;
use std::fs::read_to_string;
/// Handles the route of index page or main page of the `websurfx` meta search engine website.
#[get("/")]
pub async fn index(
hbs: web::Data<Handlebars<'_>>,
config: web::Data<Config>,
) -> Result<HttpResponse, Box<dyn std::error::Error>> {
let page_content: String = hbs.render("index", &config.style).unwrap();
Ok(HttpResponse::Ok().body(page_content))
}
/// Handles the route of any other accessed route/page which is not provided by the
/// website essentially the 404 error page.
pub async fn not_found(
hbs: web::Data<Handlebars<'_>>,
config: web::Data<Config>,
) -> Result<HttpResponse, Box<dyn std::error::Error>> {
let page_content: String = hbs.render("404", &config.style)?;
Ok(HttpResponse::Ok()
.content_type("text/html; charset=utf-8")
.body(page_content))
}
/// Handles the route of robots.txt page of the `websurfx` meta search engine website.
#[get("/robots.txt")]
pub async fn robots_data(_req: HttpRequest) -> Result<HttpResponse, Box<dyn std::error::Error>> {
let page_content: String =
read_to_string(format!("{}/robots.txt", file_path(FileType::Theme)?))?;
Ok(HttpResponse::Ok()
.content_type("text/plain; charset=ascii")
.body(page_content))
}
/// Handles the route of about page of the `websurfx` meta search engine website.
#[get("/about")]
pub async fn about(
hbs: web::Data<Handlebars<'_>>,
config: web::Data<Config>,
) -> Result<HttpResponse, Box<dyn std::error::Error>> {
let page_content: String = hbs.render("about", &config.style)?;
Ok(HttpResponse::Ok().body(page_content))
}
/// Handles the route of settings page of the `websurfx` meta search engine website.
#[get("/settings")]
pub async fn settings(
hbs: web::Data<Handlebars<'_>>,
config: web::Data<Config>,
) -> Result<HttpResponse, Box<dyn std::error::Error>> {
let page_content: String = hbs.render("settings", &config.style)?;
Ok(HttpResponse::Ok().body(page_content))
}

3
src/server/routes/mod.rs Normal file
View File

@ -0,0 +1,3 @@
//! This module provides modules to handle various routes in the search engine website.
pub mod search;

180
src/server/routes.rs → src/server/routes/search.rs
View File

@ -1,33 +1,38 @@
//! This module provides the functionality to handle different routes of the `websurfx`
//! meta search engine website and provide appropriate response to each route/page
//! when requested.
use std::fs::read_to_string;
//! This module handles the search route of the search engine website.
use crate::{
cache::cacher::RedisCache,
config::parser::Config,
engines::engine_models::EngineHandler,
handler::paths::{file_path, FileType},
results::{aggregation_models::SearchResults, aggregator::aggregate},
models::{aggregation_models::SearchResults, engine_models::EngineHandler},
results::aggregator::aggregate,
};
use actix_web::{get, web, HttpRequest, HttpResponse};
use handlebars::Handlebars;
use regex::Regex;
use serde::Deserialize;
use std::{
fs::{read_to_string, File},
io::{BufRead, BufReader, Read},
};
use tokio::join;
// ---- Constants ----
/// Initialize redis cache connection once and store it on the heap.
static REDIS_CACHE: async_once_cell::OnceCell<RedisCache> = async_once_cell::OnceCell::new();
/// A named struct which deserializes all the user provided search parameters and stores them.
///
/// # Fields
///
/// * `q` - It stores the search parameter option `q` (or query in simple words)
/// of the search url.
/// * `page` - It stores the search parameter `page` (or pageno in simple words)
/// of the search url.
#[derive(Deserialize)]
struct SearchParams {
pub struct SearchParams {
/// It stores the search parameter option `q` (or query in simple words)
/// of the search url.
q: Option<String>,
/// It stores the search parameter `page` (or pageno in simple words)
/// of the search url.
page: Option<u32>,
/// It stores the search parameter `safesearch` (or safe search level in simple words) of the
/// search url.
safesearch: Option<u8>,
}
/// Handles the route of index page or main page of the `websurfx` meta search engine website.
@ -54,18 +59,15 @@ pub async fn not_found(
}
/// A named struct which is used to deserialize the cookies fetched from the client side.
///
/// # Fields
///
/// * `theme` - It stores the theme name used in the website.
/// * `colorscheme` - It stores the colorscheme name used for the website theme.
/// * `engines` - It stores the user selected upstream search engines selected from the UI.
#[allow(dead_code)]
#[derive(Deserialize)]
struct Cookie {
theme: String,
colorscheme: String,
engines: Vec<String>,
struct Cookie<'a> {
/// It stores the theme name used in the website.
theme: &'a str,
/// It stores the colorscheme name used for the website theme.
colorscheme: &'a str,
/// It stores the user selected upstream search engines selected from the UI.
engines: Vec<&'a str>,
}
/// Handles the route of search page of the `websurfx` meta search engine website and it takes
@ -101,42 +103,58 @@ pub async fn search(
None => 1,
};
let safe_search: u8 = match config.safe_search {
3..=4 => config.safe_search,
_ => match &params.safesearch {
Some(safesearch) => match safesearch {
0..=2 => *safesearch,
_ => 1,
},
None => config.safe_search,
},
};
let (_, results, _) = join!(
results(
format!(
"http://{}:{}/search?q={}&page={}",
"http://{}:{}/search?q={}&page={}&safesearch={}",
config.binding_ip,
config.port,
query,
page - 1
page - 1,
safe_search
),
&config,
query.to_string(),
query,
page - 1,
req.clone(),
safe_search
),
results(
format!(
"http://{}:{}/search?q={}&page={}",
config.binding_ip, config.port, query, page
"http://{}:{}/search?q={}&page={}&safesearch={}",
config.binding_ip, config.port, query, page, safe_search
),
&config,
query.to_string(),
query,
page,
req.clone(),
safe_search
),
results(
format!(
"http://{}:{}/search?q={}&page={}",
"http://{}:{}/search?q={}&page={}&safesearch={}",
config.binding_ip,
config.port,
query,
page + 1
page + 1,
safe_search
),
&config,
query.to_string(),
query,
page + 1,
req.clone(),
safe_search
)
);
@ -149,35 +167,72 @@ pub async fn search(
}
}
/// Fetches the results for a query and page.
/// First checks the redis cache, if that fails it gets proper results
/// Fetches the results for a query and page. It First checks the redis cache, if that
/// fails it gets proper results by requesting from the upstream search engines.
///
/// # Arguments
///
/// * `url` - It takes the url of the current page that requested the search results for a
/// particular search query.
/// * `config` - It takes a parsed config struct.
/// * `query` - It takes the page number as u32 value.
/// * `req` - It takes the `HttpRequest` struct as a value.
///
/// # Error
///
/// It returns the `SearchResults` struct if the search results could be successfully fetched from
/// the cache or from the upstream search engines otherwise it returns an appropriate error.
async fn results(
url: String,
config: &Config,
query: String,
query: &str,
page: u32,
req: HttpRequest,
safe_search: u8,
) -> Result<SearchResults, Box<dyn std::error::Error>> {
//Initialize redis cache connection struct
let mut redis_cache = RedisCache::new(config.redis_url.clone())?;
// Initialize redis cache connection struct
let mut redis_cache: RedisCache = REDIS_CACHE
.get_or_init(async {
// Initialize redis cache connection pool only one and store it in the heap.
RedisCache::new(&config.redis_url, 5).await.unwrap()
})
.await
.clone();
// fetch the cached results json.
let cached_results_json = redis_cache.cached_json(&url);
let cached_results_json: Result<String, error_stack::Report<crate::cache::error::PoolError>> =
redis_cache.clone().cached_json(&url).await;
// check if fetched cache results was indeed fetched or it was an error and if so
// handle the data accordingly.
match cached_results_json {
Ok(results) => Ok(serde_json::from_str::<SearchResults>(&results).unwrap()),
Ok(results) => Ok(serde_json::from_str::<SearchResults>(&results)?),
Err(_) => {
if safe_search == 4 {
let mut results: SearchResults = SearchResults::default();
let mut _flag: bool =
is_match_from_filter_list(file_path(FileType::BlockList)?, query)?;
_flag = !is_match_from_filter_list(file_path(FileType::AllowList)?, query)?;
if _flag {
results.set_disallowed();
results.add_style(&config.style);
results.set_page_query(query);
redis_cache
.cache_results(&serde_json::to_string(&results)?, &url)
.await?;
return Ok(results);
}
}
// check if the cookie value is empty or not if it is empty then use the
// default selected upstream search engines from the config file otherwise
// parse the non-empty cookie and grab the user selected engines from the
// UI and use that.
let mut results: crate::results::aggregation_models::SearchResults = match req
.cookie("appCookie")
{
let mut results: SearchResults = match req.cookie("appCookie") {
Some(cookie_value) => {
let cookie_value: Cookie = serde_json::from_str(cookie_value.name_value().1)?;
let cookie_value: Cookie<'_> =
serde_json::from_str(cookie_value.name_value().1)?;
let engines = cookie_value
let engines: Vec<EngineHandler> = cookie_value
.engines
.iter()
.filter_map(|name| EngineHandler::new(name))
@ -188,8 +243,9 @@ async fn results(
page,
config.aggregator.random_delay,
config.debug,
engines,
&engines,
config.request_timeout,
safe_search,
)
.await?
}
@ -199,19 +255,43 @@ async fn results(
page,
config.aggregator.random_delay,
config.debug,
config.upstream_search_engines.clone(),
&config.upstream_search_engines,
config.request_timeout,
safe_search,
)
.await?
}
};
results.add_style(config.style.clone());
redis_cache.cache_results(serde_json::to_string(&results)?, &url)?;
if results.engine_errors_info().is_empty() && results.results().is_empty() {
results.set_filtered();
}
results.add_style(&config.style);
redis_cache
.cache_results(&serde_json::to_string(&results)?, &url)
.await?;
Ok(results)
}
}
}
/// A helper function which checks whether the search query contains any keywords which should be
/// disallowed/allowed based on the regex based rules present in the blocklist and allowlist files.
fn is_match_from_filter_list(
file_path: &str,
query: &str,
) -> Result<bool, Box<dyn std::error::Error>> {
let mut flag = false;
let mut reader = BufReader::new(File::open(file_path)?);
for line in reader.by_ref().lines() {
let re = Regex::new(&line?)?;
if re.is_match(query) {
flag = true;
break;
}
}
Ok(flag)
}
/// Handles the route of robots.txt page of the `websurfx` meta search engine website.
#[get("/robots.txt")]
pub async fn robots_data(_req: HttpRequest) -> Result<HttpResponse, Box<dyn std::error::Error>> {

20
websurfx/config.lua
View File

@ -10,6 +10,21 @@ production_use = false -- whether to use production mode or not (in other words
-- if production_use is set to true
-- There will be a random delay before sending the request to the search engines, this is to prevent DDoSing the upstream search engines from a large number of simultaneous requests.
request_timeout = 30 -- timeout for the search requests sent to the upstream search engines to be fetched (value in seconds).
rate_limiter = {
number_of_requests = 20, -- The number of request that are allowed within a provided time limit.
time_limit = 3, -- The time limit in which the quantity of requests that should be accepted.
}
-- ### Search ###
-- Filter results based on different levels. The levels provided are:
-- {{
-- 0 - None
-- 1 - Low
-- 2 - Moderate
-- 3 - High
-- 4 - Aggressive
-- }}
safe_search = 2
-- ### Website ###
-- The different colorschemes provided are:
@ -34,4 +49,7 @@ theme = "simple" -- the theme name which should be used for the website
redis_url = "redis://127.0.0.1:8082" -- redis connection url address on which the client should connect on.
-- ### Search Engines ###
upstream_search_engines = { DuckDuckGo = true, Searx = false } -- select the upstream search engines from which the results should be fetched.
upstream_search_engines = {
DuckDuckGo = true,
Searx = false,
} -- select the upstream search engines from which the results should be fetched.