feat: basic auth proxy (#369)

Author: zeze-zeze

src/internal/sio_client_impl.cpp

@@ -69,6 +69,13 @@ namespace sio
         this->sockets_invoke_void(&sio::socket::on_close);
         sync_close();
     }
+	
+    void client_impl::set_proxy_basic_auth(const std::string& uri, const std::string& username, const std::string& password)
+    {
+        m_proxy_base_url = uri;
+        m_proxy_basic_username = username;
+        m_proxy_basic_password = password;
+    }
 
     void client_impl::connect(const string& uri, const map<string,string>& query, const map<string, string>& headers, const message::ptr& auth)
     {
@@ -263,6 +270,23 @@ namespace sio
             for( auto&& header: m_http_headers ) {
                 con->replace_header(header.first, header.second);
             }
+			
+            if (!m_proxy_base_url.empty()) {
+                con->set_proxy(m_proxy_base_url, ec);
+                if (ec) {
+                    m_client.get_alog().write(websocketpp::log::alevel::app,
+                                    "Set Proxy Error: " + ec.message());
+                    break;
+                }
+                if (!m_proxy_basic_username.empty()) {
+                    con->set_proxy_basic_auth(m_proxy_basic_username, m_proxy_basic_password, ec);
+                    if (ec) {
+                        m_client.get_alog().write(websocketpp::log::alevel::app,
+                                    "Set Proxy Basic Auth Error: " + ec.message());
+                        break;
+                    }
+                }
+            }
 
             m_client.connect(con);
             return;

src/internal/sio_client_impl.h

@@ -129,6 +129,8 @@ namespace sio
         void set_logs_quiet();
 
         void set_logs_verbose();
+		
+        void set_proxy_basic_auth(const std::string& uri, const std::string& username, const std::string& password);
 
     protected:
         void send(packet& p);
@@ -203,6 +205,9 @@ namespace sio
         std::string m_query_string;
         std::map<std::string, std::string> m_http_headers;
         message::ptr m_auth;
+        std::string m_proxy_base_url;
+        std::string m_proxy_basic_username;
+        std::string m_proxy_basic_password;
 
         unsigned int m_ping_interval;
         unsigned int m_ping_timeout;

src/sio_client.cpp

@@ -66,6 +66,11 @@ namespace sio
     {
         m_impl->clear_socket_listeners();
     }
+	
+    void client::set_proxy_basic_auth(const std::string& uri, const std::string& username, const std::string& password)
+    {
+        m_impl->set_proxy_basic_auth(uri, username, password);
+    }
 
     void client::connect(const std::string& uri)
     {

src/sio_client.h

@@ -87,6 +87,8 @@ namespace sio
 
         void sync_close();
 
+        void set_proxy_basic_auth(const std::string& uri, const std::string& username, const std::string& password);
+		
         bool opened() const;
 
         std::string const& get_sessionid() const;