feat(provider): support ANTHROPIC_BASE_URL for custom endpoint override

crates/jcode-base/src/provider/anthropic.rs

@@ -44,6 +44,18 @@ const API_URL: &str = "https://api.anthropic.com/v1/messages";
 /// OAuth endpoint (with beta=true query param)
 const API_URL_OAUTH: &str = "https://api.anthropic.com/v1/messages?beta=true";
 
+/// Returns the messages endpoint URL, respecting ANTHROPIC_BASE_URL if set.
+fn messages_url(is_oauth: bool) -> String {
+    if let Ok(base) = std::env::var("ANTHROPIC_BASE_URL") {
+        let base = base.trim_end_matches('/');
+        format!("{}/messages", base)
+    } else if is_oauth {
+        API_URL_OAUTH.to_string()
+    } else {
+        API_URL.to_string()
+    }
+}
+
 /// User-Agent for OAuth requests, matching the official Claude Code CLI.
 pub(crate) const CLAUDE_CLI_USER_AGENT: &str = "claude-cli/2.1.123 (external, sdk-cli)";
 
@@ -1769,7 +1781,7 @@ async fn stream_response(
 
     let connect_start = std::time::Instant::now();
     // Build request with appropriate auth headers
-    let url = if is_oauth { API_URL_OAUTH } else { API_URL };
+    let url = messages_url(is_oauth);
 
     let mut req = client
         .post(url)

crates/jcode-base/src/provider/anthropic_tests.rs

@@ -1177,6 +1177,28 @@ async fn test_sanitize_dangling_tool_ids_with_dots() {
     }
 }
 
+#[test]
+fn test_messages_url_default() {
+    crate::env::remove_var("ANTHROPIC_BASE_URL");
+    assert_eq!(messages_url(false), API_URL);
+    assert_eq!(messages_url(true), API_URL_OAUTH);
+}
+
+#[test]
+fn test_messages_url_base_url_override() {
+    crate::env::set_var("ANTHROPIC_BASE_URL", "http://127.0.0.1:3456/v1");
+    let _guard = EnvVarGuard { key: "ANTHROPIC_BASE_URL", previous: None };
+    assert_eq!(messages_url(false), "http://127.0.0.1:3456/v1/messages");
+    assert_eq!(messages_url(true), "http://127.0.0.1:3456/v1/messages");
+}
+
+#[test]
+fn test_messages_url_base_url_trailing_slash() {
+    crate::env::set_var("ANTHROPIC_BASE_URL", "http://127.0.0.1:3456/v1/");
+    let _guard = EnvVarGuard { key: "ANTHROPIC_BASE_URL", previous: None };
+    assert_eq!(messages_url(false), "http://127.0.0.1:3456/v1/messages");
+}
+
 /// The runtime-provider identity that `set_credential_mode` writes must decode
 /// back to the exact same credential mode. This guards the model picker / header
 /// widget from reporting OAuth when an API key is in use (or vice versa): the