Retry request up to 3 times on curl error

Maybe helps with random errors like in #26

src/constants.rs

@@ -7,3 +7,5 @@ pub const TWITCH_HLS_BASE: &str = "https://usher.ttvnw.net/api/channel/hls/";
 
 pub const DEFAULT_CLIENT_ID: &str = "kimne78kx3ncx6brgo4mv6wki5h1ko";
 pub const DEFAULT_CONFIG_PATH: &str = "twitch-hls-client/config";
+
+pub const HTTP_RETRIES: u8 = 3;

src/http.rs

@@ -39,7 +39,18 @@ fn init_curl<T: Write>(handle: &mut Easy2<RequestHandler<T>>, url: &Url) -> Resu
 }
 
 fn perform<T: Write>(handle: &mut Easy2<RequestHandler<T>>) -> Result<()> {
-    handle.perform()?;
+    let mut retries = 0;
+    loop {
+        match handle.perform() {
+            Ok(()) => break,
+            Err(_) if retries < constants::HTTP_RETRIES => {
+                retries += 1;
+                continue;
+            },
+            Err(e) => return Err(e.into()),
+        }
+    }
+
     handle.get_ref().check_error()?;
 
     let code = handle.response_code()?;