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(Unicode C) WebSocket Connect through SOCKS ProxyThis example shows how to establish a WebSocket connection through a SOCKS proxy.
#include <C_CkRestW.h> #include <C_CkSocketW.h> #include <C_CkWebSocketW.h> void ChilkatSample(void) { HCkRestW rest; HCkSocketW socket; BOOL bTls; int port; int maxWaitMs; BOOL success; HCkWebSocketW ws; const wchar_t *responseBody; int statusCode; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // -------------------------------------------------- // This example borrows the code from the REST using SOCKS Proxy example. // We first use the Chilkat Socket object to establish a connection to the WebSocket server through a SOCKS proxy. // Next, the Rest object uses the Socket object for its connection. // Finally, the WebSocket object uses the Rest object for its connection. // rest = CkRestW_Create(); socket = CkSocketW_Create(); // Set the SOCKS proxy domain or IP address, port, and SOCKS version number (4 or 5) CkSocketW_putSocksHostname(socket,L"192.168.1.79"); CkSocketW_putHttpProxyPort(socket,1080); CkSocketW_putSocksVersion(socket,5); // Provide authentication to the SOCKS proxy, if needed. CkSocketW_putSocksUsername(socket,L"SOCKS_PROXY_LOGIN"); CkSocketW_putSocksPassword(socket,L"SOCKS_PROXY_PASSWORD"); // Connect to the websocket server through the HTTP proxy. bTls = FALSE; port = 80; maxWaitMs = 5000; success = CkSocketW_Connect(socket,L"some-websocket-server.com",port,bTls,maxWaitMs); if (success != TRUE) { wprintf(L"Connect Failure Error Code: %d\n",CkSocketW_getConnectFailReason(socket)); wprintf(L"%s\n",CkSocketW_lastErrorText(socket)); CkRestW_Dispose(rest); CkSocketW_Dispose(socket); return; } // Tell the Rest object to use the connected socket. success = CkRestW_UseConnection(rest,socket,TRUE); if (success != TRUE) { wprintf(L"%s\n",CkRestW_lastErrorText(rest)); CkRestW_Dispose(rest); CkSocketW_Dispose(socket); return; } ws = CkWebSocketW_Create(); // Tell the WebSocket to use this connection. success = CkWebSocketW_UseConnection(ws,rest); if (success != TRUE) { wprintf(L"%s\n",CkWebSocketW_lastErrorText(ws)); CkRestW_Dispose(rest); CkSocketW_Dispose(socket); CkWebSocketW_Dispose(ws); return; } // Add the standard WebSocket open handshake headers that will be needed. // (This adds the required HTTP request headers to the rest object.) CkWebSocketW_AddClientHeaders(ws); // Add any additional headers that might be desired. // Two common WebSocketSpecific headers are "Sec-WebSocket-Protocol" and "Origin". CkRestW_AddHeader(rest,L"Sec-WebSocket-Protocol",L"x-some-websocket-subprotocol"); CkRestW_AddHeader(rest,L"Origin",L"http://some-websocket-server.com"); // Do the open handshake. responseBody = CkRestW_fullRequestNoBody(rest,L"GET",L"/something"); if (CkRestW_getLastMethodSuccess(rest) != TRUE) { wprintf(L"%s\n",CkRestW_lastErrorText(rest)); CkRestW_Dispose(rest); CkSocketW_Dispose(socket); CkWebSocketW_Dispose(ws); return; } // If successful, the HTTP response status code should be 101, // and the response body will be empty. (If it failed, we'll have a look // at the response body..) statusCode = CkRestW_getResponseStatusCode(rest); wprintf(L"Response status code: %d\n",statusCode); if (statusCode != 101) { wprintf(L"%s\n",responseBody); wprintf(L"-- Failed because of unexpected response status code.\n"); CkRestW_Dispose(rest); CkSocketW_Dispose(socket); CkWebSocketW_Dispose(ws); return; } // We have the expected 101 response, so let's now validate the // contents of the response, such as the value sent by the server in the // Sec-WebSocket-Accept header. success = CkWebSocketW_ValidateServerHandshake(ws); if (success != TRUE) { wprintf(L"%s\n",CkWebSocketW_lastErrorText(ws)); CkRestW_Dispose(rest); CkSocketW_Dispose(socket); CkWebSocketW_Dispose(ws); return; } wprintf(L"WebSocket connection successful.\n"); // The application may now begin sending and receiving frames on the WebSocket connection. // (At this point, we're done with the rest and socket objects...) wprintf(L"Success.\n"); CkRestW_Dispose(rest); CkSocketW_Dispose(socket); CkWebSocketW_Dispose(ws); } |
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