http client: stop hardcoding Accept header, and use a default value if one is passed in 👭

ixwebsocket/IXHttpClient.cpp

@@ -74,7 +74,6 @@ namespace ix
         std::stringstream ss;
         ss << verb << " " << path << " HTTP/1.1\r\n";
         ss << "Host: " << host << "\r\n";
-        ss << "Accept: */*" << "\r\n";
 
         if (args.compress)
         {
@@ -87,6 +86,18 @@ namespace ix
             ss << it.first << ": " << it.second << "\r\n";
         }
 
+        // Set a default Accept header if none is present
+        if (headers.find("Accept") == headers.end())
+        {
+            ss << "Accept: */*" << "\r\n";
+        }
+
+        // Set a default User agent if none is present
+        if (headers.find("User-Agent") == headers.end())
+        {
+            ss << "User-Agent: ixwebsocket" << "\r\n";
+        }
+
         if (verb == kPost)
         {
             ss << "Content-Length: " << body.size() << "\r\n";