Automatically retry webrtc build downloads

.changeset/automatically_retry_webrtc_build_downloads.md

@@ -0,0 +1,9 @@
+---
+webrtc-sys: patch
+webrtc-sys-build: patch
+livekit: patch
+livekit-ffi: patch
+libwebrtc: patch
+---
+
+# Automatically retry webrtc build downloads

webrtc-sys/build/src/lib.rs

@@ -209,8 +209,22 @@ pub fn download_webrtc() -> Result<()> {
         return Ok(());
     }
 
-    let mut resp = reqwest::blocking::get(download_url())
-        .context("Failed to send HTTP request to download WebRTC")?;
+    let mut resp = reqwest::blocking::get(download_url());
+    for attempt in 1..3 {
+        let transient = match &resp {
+            Ok(resp) => {
+                resp.status().is_server_error() || resp.status() == StatusCode::TOO_MANY_REQUESTS
+            }
+            Err(_) => true,
+        };
+        if !transient {
+            break;
+        }
+        println!("cargo:warning=webrtc download attempt {} failed, retrying in 5s...", attempt);
+        std::thread::sleep(std::time::Duration::from_secs(5));
+        resp = reqwest::blocking::get(download_url());
+    }
+    let mut resp = resp.context("Failed to send HTTP request to download WebRTC")?;
     if resp.status() != StatusCode::OK {
         return Err(anyhow!("failed to download webrtc: {}", resp.status()));
     }