feat(middleware-user-agent): lowercase service ids

Author: AllanZhengYP

packages/middleware-user-agent/src/user-agent-middleware.spec.ts

@@ -52,6 +52,7 @@ describe("userAgentMiddleware", () => {
       { ua: ["$prefix/&name", "1.0.0"], expected: "$prefix/&name/1.0.0" },
       { ua: ["name(or not)", "1.0.0"], expected: "name_or_not_/1.0.0" },
       { ua: ["name", "1.0.0(test_version)"], expected: "name/1.0.0_test_version" },
+      { ua: ["api/Service", "1.0.0"], expected: "api/service/1.0.0" },
     ];
     for (const { ua, expected } of cases) {
       it(`should sanitize user agent ${ua} to ${expected}`, async () => {

packages/middleware-user-agent/src/user-agent-middleware.ts

@@ -60,7 +60,10 @@ export const userAgentMiddleware = (options: UserAgentResolvedConfig) => <Output
 const escapeUserAgent = ([name, version]: UserAgentPair): string => {
   const prefixSeparatorIndex = name.indexOf("/");
   const prefix = name.substring(0, prefixSeparatorIndex); // If no prefix, prefix is just ""
-  const uaName = name.substring(prefixSeparatorIndex + 1);
+  let uaName = name.substring(prefixSeparatorIndex + 1);
+  if (prefix === "api") {
+    uaName = uaName.toLowerCase();
+  }
   return [prefix, uaName, version]
     .filter((item) => item && item.length > 0)
     .map((item) => item?.replace(UA_ESCAPE_REGEX, "_"))