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Improve Aggregation function & config parser

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Refactor aggregation function
Rename visiting_url to url, as they are always the same (see upstream engine scalping).
Refactor parsing function to be more readable.
This commit is contained in:
Milim 2023-08-17 22:48:20 +02:00
parent af3b1cb308
commit 15dfda6ea9
8 changed files with 103 additions and 136 deletions
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6
.cspell.json
View File

@ -11,6 +11,10 @@
],
"language": "en",
"noConfigSearch": true,
"words": ["megalinter", "oxsecurity"],
"words": [
"megalinter",
"oxsecurity",
"websurfx"
],
"version": "0.2"
}

44
src/config/parser.rs
View File

@ -57,7 +57,7 @@ impl Config {
/// # Arguments
///
/// * `logging_initialized` - It takes a boolean which ensures that the logging doesn't get
/// initialized twice.
/// initialized twice. Pass false if the logger has not yet been initialized.
///
/// # Error
///
@ -77,22 +77,8 @@ impl Config {
let debug: bool = globals.get::<_, bool>("debug")?;
let logging:bool= globals.get::<_, bool>("logging")?;
// Check whether logging has not been initialized before.
if logging_initialized {
if let Ok(pkg_env_var) = std::env::var("PKG_ENV"){
if pkg_env_var.to_lowercase() == "dev" {
env_logger::Builder::new().filter(None, LevelFilter::Trace).init();
}
} else {
// Initializing logging middleware with level set to default or info.
let mut log_level: LevelFilter = LevelFilter::Error;
if logging && debug == false {
log_level = LevelFilter::Info;
} else if debug {
log_level = LevelFilter::Debug;
};
env_logger::Builder::new().filter(None, log_level).init();
}
if !logging_initialized {
set_logging_level(debug, logging);
}
let threads: u8 = if parsed_threads == 0 {
@ -127,6 +113,7 @@ impl Config {
})
})
}
/// A helper function which returns an appropriate config file path checking if the config
/// file exists on that path.
///
@ -173,3 +160,26 @@ impl Config {
Err("Config file not found!!".to_string().into())
}
}
/// a helper function that sets the proper logging level
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" {
env_logger::Builder::new()
.filter(None, LevelFilter::Trace)
.init();
return;
}
}
// Initializing logging middleware with level set to default or info.
let log_level = match (debug, logging) {
(true, true) => LevelFilter::Error,
(true, false) => LevelFilter::Debug,
(false, true) => LevelFilter::Info,
(false, false) => LevelFilter::Error,
};
env_logger::Builder::new().filter(None, log_level).init();
}

2
src/engines/duckduckgo.rs
View File

@ -147,7 +147,7 @@ impl SearchEngine for DuckDuckGo {
vec!["duckduckgo".to_string()],
)
})
.map(|search_result| (search_result.visiting_url.clone(), search_result))
.map(|search_result| (search_result.url.clone(), search_result))
.collect())
}
}

4
src/engines/engine_models.rs
View File

@ -43,7 +43,7 @@ impl fmt::Display for EngineError {
impl error_stack::Context for EngineError {}
/// A trait to define common behaviour for all search engines.
/// A trait to define common behavior for all search engines.
#[async_trait::async_trait]
pub trait SearchEngine {
async fn fetch_html_from_upstream(
@ -56,7 +56,7 @@ pub trait SearchEngine {
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 behaviour
.headers(header_map) // add spoofed headers to emulate human behavior
.send()
.await
.into_report()

2
src/engines/searx.rs
View File

@ -137,7 +137,7 @@ impl SearchEngine for Searx {
vec!["searx".to_string()],
)
})
.map(|search_result| (search_result.visiting_url.clone(), search_result))
.map(|search_result| (search_result.url.clone(), search_result))
.collect())
}
}

36
src/results/aggregation_models.rs
View File

@ -11,8 +11,6 @@ use crate::{config::parser_models::Style, engines::engine_models::EngineError};
/// # Fields
///
/// * `title` - The title of the search result.
/// * `visiting_url` - The url which is accessed when clicked on it (href url in html in simple
/// words).
/// * `url` - The url to be displayed below the search result title in html.
/// * `description` - The description of the search result.
/// * `engine` - The names of the upstream engines from which this results were provided.
@ -20,7 +18,6 @@ use crate::{config::parser_models::Style, engines::engine_models::EngineError};
#[serde(rename_all = "camelCase")]
pub struct SearchResult {
pub title: String,
pub visiting_url: String,
pub url: String,
pub description: String,
pub engine: Vec<String>,
@ -37,21 +34,23 @@ impl SearchResult {
/// * `url` - The url to be displayed below the search result title in html.
/// * `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,
visiting_url: String,
url: String,
description: String,
engine: Vec<String>,
) -> Self {
pub fn new(title: String, url: String, description: String, engine: Vec<String>) -> Self {
SearchResult {
title,
visiting_url,
url,
description,
engine,
}
}
pub fn from_raw(raw: RawSearchResult) -> Self {
SearchResult {
title: raw.title,
url: raw.url,
description: raw.description,
engine: raw.engine,
}
}
}
/// A named struct to store the raw scraped search results scraped search results from the
@ -61,14 +60,14 @@ impl SearchResult {
/// # Fields
///
/// * `title` - The title of the search result.
/// * `visiting_url` - The url which is accessed when clicked on it
/// * `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)]
pub struct RawSearchResult {
pub title: String,
pub visiting_url: String,
pub url: String,
pub description: String,
pub engine: Vec<String>,
}
@ -79,19 +78,14 @@ impl RawSearchResult {
/// # Arguments
///
/// * `title` - The title of the search result.
/// * `visiting_url` - The url which is accessed when clicked on it
/// * `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,
visiting_url: String,
description: String,
engine: Vec<String>,
) -> Self {
pub fn new(title: String, url: String, description: String, engine: Vec<String>) -> Self {
RawSearchResult {
title,
visiting_url,
url,
description,
engine,
}

139
src/results/aggregator.rs
View File

@ -64,11 +64,10 @@ pub async fn aggregate(
page: u32,
random_delay: bool,
debug: bool,
upstream_search_engines: Vec<String>,
mut upstream_search_engines: Vec<String>,
request_timeout: u8,
) -> Result<SearchResults, Box<dyn std::error::Error>> {
let user_agent: String = random_user_agent();
let mut result_map: HashMap<String, RawSearchResult> = HashMap::new();
// Add a random delay before making the request.
if random_delay || !debug {
@ -77,20 +76,14 @@ pub async fn aggregate(
tokio::time::sleep(Duration::from_secs(delay_secs)).await;
}
// fetch results from upstream search engines simultaneously/concurrently.
let search_engines: Vec<Box<dyn SearchEngine + Send + Sync>> = upstream_search_engines
// create tasks for upstream result fetching
let tasks: FutureVec = upstream_search_engines
.iter()
.map(|engine| match engine.to_lowercase().as_str() {
"duckduckgo" => Box::new(duckduckgo::DuckDuckGo) as Box<dyn SearchEngine + Send + Sync>,
"searx" => Box::new(searx::Searx) as Box<dyn SearchEngine + Send + Sync>,
&_ => panic!("Config Error: Incorrect config file option provided"),
})
.collect();
let task_capacity: usize = search_engines.len();
let tasks: FutureVec = search_engines
.into_iter()
.map(|search_engine| {
let query: String = query.clone();
let user_agent: String = user_agent.clone();
@ -102,101 +95,67 @@ pub async fn aggregate(
})
.collect();
let mut outputs = Vec::with_capacity(task_capacity);
// get upstream responses
let mut responses = Vec::with_capacity(tasks.len());
for task in tasks {
if let Ok(result) = task.await {
outputs.push(result)
responses.push(result)
}
}
// aggregate search results, removing duplicates and handling errors the upstream engines returned
let mut result_map: HashMap<String, RawSearchResult> = HashMap::new();
let mut engine_errors_info: Vec<EngineErrorInfo> = Vec::new();
// The code block `outputs.iter()` determines whether it is the first time the code is being run.
// It does this by checking the initial flag. If it is the first time, the code selects the first
// engine from which results are fetched and adds or extends them into the `result_map`. If the
// initially selected engine fails, the code automatically selects another engine to map or extend
// into the `result_map`. On the other hand, if an engine selected for the first time successfully
// fetches results and maps them into the `result_map`, the initial flag is set to false. Subsequently,
// the code iterates through the remaining engines one by one. It compares the fetched results from each
// engine with the results already present in the `result_map` to identify any duplicates. If duplicate
// results are found, the code groups them together with the name of the engine from which they were
// fetched, and automatically removes the duplicate results from the newly fetched data.
//
// Additionally, the code handles errors returned by the engines. It keeps track of which engines
// encountered errors and stores this information in a vector of structures called `EngineErrorInfo`.
// Each structure in this vector contains the name of the engine and the type of error it returned.
// These structures will later be added to the final `SearchResults` structure. The `SearchResults`
// structure is used to display an error box in the UI containing the relevant information from
// the `EngineErrorInfo` structure.
//
// In summary, this code block manages the selection of engines, handling of duplicate results, and tracking
// of errors in order to populate the `result_map` and provide informative feedback to the user through the
// `SearchResults` structure.
let mut initial: bool = true;
let mut counter: usize = 0;
outputs.iter().for_each(|results| {
if initial {
match results {
Ok(result) => {
result_map.extend(result.clone());
counter += 1;
initial = false
let mut handle_error = |error: Report<EngineError>, engine_name: String| {
log::error!("Engine Error: {:?}", error);
engine_errors_info.push(EngineErrorInfo::new(
error.downcast_ref::<EngineError>().unwrap(),
engine_name,
));
};
for _ in 0..responses.len() {
let response = responses.pop().unwrap();
let engine_name = upstream_search_engines.pop().unwrap();
if result_map.is_empty() {
match response {
Ok(results) => {
result_map = results.clone();
}
Err(error_type) => {
log::error!("Engine Error: {:?}", error_type);
engine_errors_info.push(EngineErrorInfo::new(
error_type.downcast_ref::<EngineError>().unwrap(),
upstream_search_engines[counter].clone(),
));
counter += 1
Err(error) => {
handle_error(error, engine_name.clone());
}
}
} else {
match results {
Ok(result) => {
result.clone().into_iter().for_each(|(key, value)| {
result_map
.entry(key)
.and_modify(|result| {
result.add_engines(value.clone().engine());
})
.or_insert_with(|| -> RawSearchResult {
RawSearchResult::new(
value.title.clone(),
value.visiting_url.clone(),
value.description.clone(),
value.engine.clone(),
)
});
});
counter += 1
}
Err(error_type) => {
log::error!("Engine Error: {:?}", error_type);
engine_errors_info.push(EngineErrorInfo::new(
error_type.downcast_ref::<EngineError>().unwrap(),
upstream_search_engines[counter].clone(),
));
counter += 1
}
continue;
}
match response {
Ok(result) => {
result.into_iter().for_each(|(key, value)| {
result_map
.entry(key)
.and_modify(|result| {
result.add_engines(engine_name.clone());
})
.or_insert_with(|| -> RawSearchResult { value });
});
}
Err(error) => {
handle_error(error, engine_name.clone());
}
}
});
}
let mut results = Vec::with_capacity(result_map.len());
for (_, result) in result_map {
results.push(SearchResult::from_raw(result))
}
Ok(SearchResults::new(
result_map
.into_iter()
.map(|(key, value)| {
SearchResult::new(
value.title,
value.visiting_url,
key,
value.description,
value.engine,
)
})
.collect(),
results,
query.to_string(),
engine_errors_info,
))

4
tests/index.rs
View File

@ -8,7 +8,7 @@ fn spawn_app() -> String {
// Binding to port 0 will trigger the OS to assign a port for us.
let listener = TcpListener::bind("127.0.0.1:0").expect("Failed to bind random port");
let port = listener.local_addr().unwrap().port();
let config = Config::parse(true).unwrap();
let config = Config::parse(false).unwrap();
let server = run(listener, config).expect("Failed to bind address");
tokio::spawn(server);
@ -36,7 +36,7 @@ async fn test_index() {
assert_eq!(res.status(), 200);
let handlebars = handlebars();
let config = Config::parse(false).unwrap();
let config = Config::parse(true).unwrap();
let template = handlebars.render("index", &config.style).unwrap();
assert_eq!(res.text().await.unwrap(), template);
}