Provided a config option under the server section of the config to allow users to keep tcp connections alive for each request for a certain period of time

src/results/aggregator.rs

@@ -73,10 +73,12 @@ pub async fn aggregate(
     config: &Config,
     upstream_search_engines: &[EngineHandler],
     safe_search: u8,
+    tcp_connection_keepalive: u8,
 ) -> Result<SearchResults, Box<dyn std::error::Error>> {
     let client = CLIENT.get_or_init(|| {
         ClientBuilder::new()
             .timeout(Duration::from_secs(config.request_timeout as u64)) // Add timeout to request to avoid DDOSing the server
+            .tcp_keepalive(Duration::from_secs(tcp_connection_keepalive as u64))
             .connect_timeout(Duration::from_secs(config.request_timeout as u64)) // Add timeout to request to avoid DDOSing the server
             .https_only(true)
             .gzip(true)

src/server/routes/search.rs

@@ -216,6 +216,7 @@ async fn results(
                             .filter_map(|engine| EngineHandler::new(engine).ok())
                             .collect::<Vec<EngineHandler>>(),
                         safe_search_level,
+                        30,
                     )
                     .await?
                 }

websurfx/config.lua

@@ -10,6 +10,7 @@ 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).
+tcp_connection_keepalive = 30 -- the amount of time the tcp connection should remain alive (or connected to the server). (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.