fix: redirect in --location relative fetch (#9150)

cli/tests/081_location_relative_fetch_redirect.ts

@@ -0,0 +1,2 @@
+const response = await fetch("/");
+console.log(response.url);

cli/tests/081_location_relative_fetch_redirect.ts.out

@@ -0,0 +1 @@
+[WILDCARD]http://localhost:4545/

cli/tests/integration_tests.rs

@@ -2662,6 +2662,12 @@ itest!(_080_deno_emit_permissions {
   exit_code: 1,
 });
 
+itest!(_081_location_relative_fetch_redirect {
+  args: "run --location http://127.0.0.1:4546/ --allow-net 081_location_relative_fetch_redirect.ts",
+  output: "081_location_relative_fetch_redirect.ts.out",
+  http_server: true,
+});
+
 itest!(js_import_detect {
   args: "run --quiet --reload js_import_detect.ts",
   output: "js_import_detect.ts.out",

op_crates/fetch/26_fetch.js

@@ -1373,7 +1373,7 @@
         redirected,
         rid: fetchResponse.bodyRid,
         status: fetchResponse.status,
-        url,
+        url: fetchResponse.url,
       });
 
       const response = new Response(responseBody, responseInit);
@@ -1404,7 +1404,7 @@
               !redirectUrl.startsWith("http://") &&
               !redirectUrl.startsWith("https://")
             ) {
-              redirectUrl = new URL(redirectUrl, url).href;
+              redirectUrl = new URL(redirectUrl, fetchResponse.url).href;
             }
             url = redirectUrl;
             redirected = true;

op_crates/fetch/lib.rs

@@ -227,6 +227,7 @@ pub async fn op_fetch_send(
 
   //debug!("Fetch response {}", url);
   let status = res.status();
+  let url = res.url().to_string();
   let mut res_headers = Vec::new();
   for (key, val) in res.headers().iter() {
     let key_string = key.to_string();
@@ -261,6 +262,7 @@ pub async fn op_fetch_send(
     "status": status.as_u16(),
     "statusText": status.canonical_reason().unwrap_or(""),
     "headers": res_headers,
+    "url": url,
     "responseRid": rid,
   }))
 }