Use SOCKS5 configuration for HTTP requests

src/http.rs

@@ -4,10 +4,21 @@ use std::time::Duration;
 
 use anyhow::Result;
 
+use crate::socks::Socks5Config;
+
 const HTTP_TIMEOUT: Duration = Duration::from_secs(30);
 
-pub(crate) fn get_client() -> Result<reqwest::Client> {
-    Ok(reqwest::ClientBuilder::new()
-        .timeout(HTTP_TIMEOUT)
-        .build()?)
+pub(crate) fn get_client(socks5_config: Option<Socks5Config>) -> Result<reqwest::Client> {
+    let builder = reqwest::ClientBuilder::new().timeout(HTTP_TIMEOUT);
+    let builder = if let Some(socks5_config) = socks5_config {
+        let proxy = reqwest::Proxy::all(socks5_config.to_url())?;
+        builder.proxy(proxy)
+    } else {
+        // Disable usage of "system" proxy configured via environment variables.
+        // It is enabled by default in `reqwest`, see
+        // <https://docs.rs/reqwest/0.11.14/reqwest/struct.ClientBuilder.html#method.no_proxy>
+        // for documentation.
+        builder.no_proxy()
+    };
+    Ok(builder.build()?)
 }