Make it possible to set the user agent for websockets

Release/include/cpprest/ws_client.h

@@ -150,6 +150,12 @@ class websocket_client_config
  return m_sni_hostname;
  }
 
+ /// <summary>
+ /// Sets the User Agent to be used for the connection
+ /// </summary>
+ /// <param name="name">The User Agent to use, as a string.</param>
+ _ASYNCRTIMP void set_user_agent(const utf8string &user_agent);
+
  /// <summary>
  /// Gets the headers of the HTTP request message used in the WebSocket protocol handshake.
  /// </summary>

Release/src/websockets/client/ws_client_wspp.cpp

@@ -312,6 +312,15 @@ class wspp_callback_client : public websocket_client_callback_impl, public std::
  shutdown_wspp_impl<WebsocketConfigType>(con_hdl, false);
  });
 
+ // Set User Agent specified by the user. This needs to happen before any connection is created
+ const auto& headers = m_config.headers();
+
+ auto user_agent_it = headers.find(web::http::header_names::user_agent);
+ if (user_agent_it != headers.end())
+ {
+ client.set_user_agent(utility::conversions::to_utf8string(user_agent_it->second));
+ }
+
  // Get the connection handle to save for later, have to create temporary
  // because type erasure occurs with connection_hdl.
  websocketpp::lib::error_code ec;
@@ -323,7 +332,6 @@ class wspp_callback_client : public websocket_client_callback_impl, public std::
  }
 
  // Add any request headers specified by the user.
- const auto & headers = m_config.headers();
  for (const auto & header : headers)
  {
  if (!utility::details::str_icmp(header.first, g_subProtocolHeader))

Release/src/websockets/client/ws_msg.cpp

@@ -28,6 +28,12 @@ namespace client
 {
 
 static ::utility::string_t g_subProtocolHeader = _XPLATSTR("Sec-WebSocket-Protocol");
+
+void websocket_client_config::set_user_agent(const utf8string &user_agent)
+{
+ headers().add(web::http::header_names::user_agent, utility::conversions::to_string_t(user_agent));
+}
+
 void websocket_client_config::add_subprotocol(const ::utility::string_t &name)
 {
  m_headers.add(g_subProtocolHeader, name);