Allow specifying SAMPLY_SERVER_URL

Constellation · Constellation · commit 260736894e8f · 2025-10-24T11:07:10.000-07:00
This patch adds reading envvar SAMPLY_SERVER_URL to embed it into the served
HTML &amp; used URLs for samply output. It is possible that we would like to
launch this samply result in the testbed server and we would like to
offer profiler result remotely. So we can launch samply with
--address 0.0.0.0 and by using this SAMPLY_SERVER_URL, we can expose samply as
a remote symbol / profile server.
diff --git a/samply/src/server.rs b/samply/src/server.rs
@@ -70,10 +70,14 @@ pub async fn start_server(
 
     let token = generate_token();
     let path_prefix = format!("/{token}");
-    let server_origin = format!("http://{addr}");
+    let env_server_override = std::env::var("SAMPLY_SERVER_URL").ok();
+    let server_origin = match &env_server_override {
+        Some(s) => s.trim_end_matches('/').to_string(),
+        None => format!("http://{addr}"),
+    };
     let symbol_server_url = format!("{server_origin}{path_prefix}");
     let mut template_values: HashMap<&'static str, String> = HashMap::new();
-    template_values.insert("SERVER_URL", server_origin.clone());
+    template_values.insert("SAMPLY_SERVER_URL", server_origin.clone());
     template_values.insert("PATH_PREFIX", path_prefix.clone());
 
     let profiler_url = if profile_filename.is_some() {
@@ -166,7 +170,7 @@ const TEMPLATE_WITH_PROFILE: &str = r#"
 <title>Profiler Symbol Server</title>
 <body>
 
-<p>This is the profiler symbol server, running at <code>SERVER_URL</code>. You can:</p>
+<p>This is the profiler symbol server, running at <code>SAMPLY_SERVER_URL</code>. You can:</p>
 <ul>
     <li><a href="PROFILER_URL">Open the profile in the profiler UI</a></li>
     <li><a download href="PROFILE_URL">Download the raw profile JSON</a></li>
@@ -182,7 +186,7 @@ const TEMPLATE_WITHOUT_PROFILE: &str = r#"
 <title>Profiler Symbol Server</title>
 <body>
 
-<p>This is the profiler symbol server, running at <code>SERVER_URL</code>. You can:</p>
+<p>This is the profiler symbol server, running at <code>SAMPLY_SERVER_URL</code>. You can:</p>
 <ul>
     <li>Obtain symbols by POSTing to <code>PATH_PREFIX/symbolicate/v5</code>, with the format specified by the <a href="https://tecken.readthedocs.io/en/latest/symbolication.html">Mozilla symbolication API documentation</a>.</li>
     <li>Obtain source code by POSTing to <code>PATH_PREFIX/source/v1</code>, with the format specified in this <a href="https://github.com/mstange/profiler-get-symbols/issues/24#issuecomment-989985588">github comment</a>.</li>
