test to reproduce node extra headers issue

nodejs/__test__/remote.test.ts

@@ -108,7 +108,10 @@ describe("remote connection", () => {
   it("should pass on requested extra headers", async () => {
     await withMockDatabase(
       (req, res) => {
-        expect(req.headers["x-my-header"]).toEqual("my-value");
+        expect(req.headers["foo"]).toEqual("1");
+        expect(req.headers["bar"]).toEqual("2");
+        expect(req.headers["baz"]).toEqual("3");
+        expect(req.headers["x-log-attrs"]).toEqual("foo, bar, baz");
 
         const body = JSON.stringify({ tables: [] });
         res.writeHead(200, { "Content-Type": "application/json" }).end(body);
@@ -119,9 +122,12 @@ describe("remote connection", () => {
       },
       {
         clientConfig: {
-          extraHeaders: {
-            "x-my-header": "my-value",
-          },
+            extraHeaders: {
+                "x-log-attrs": "foo, bar, baz",
+                foo: "1",
+                bar: "2",
+                baz: "3",
+            },
         },
       },
     );

rust/lancedb/src/remote/client.rs

@@ -2,7 +2,7 @@
 // SPDX-FileCopyrightText: Copyright The LanceDB Authors
 
 use http::HeaderName;
-use log::debug;
+use log::{debug, info};
 use reqwest::{
     header::{HeaderMap, HeaderValue},
     Body, Request, RequestBuilder, Response,
@@ -324,6 +324,7 @@ impl<S: HttpSend> RestfulLanceDbClient<S> {
         }
 
         for (key, value) in &config.extra_headers {
+            info!("header: {}={}", key, value);
             let key_parsed = HeaderName::from_str(key).map_err(|_| Error::InvalidInput {
                 message: format!("non-ascii value for header '{}' provided", key),
             })?;