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POC++ HTTP GET request problems?
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copied!<p>I have written a program that sends a tcp request to a web address specified in the command line and prints the response. When I send thisget request to www.google.co.uk (or any website) I get nothing back :(</p> <p>Could somebody tell me what I'm doing wrong as well as what a correct GET request to google should look like. Here's the code...</p> <pre><code>#include <WinSock2.h> #include <WS2tcpip.h> #include <stdio.h> #pragma comment(lib, "Ws2_32.lib") int main(int argc, char *argv[]){ WSADATA wsaData; int iResult; //Initialize Winsock iResult = WSAStartup(MAKEWORD(2,2), &wsaData); if(iResult != 0){ printf("WSAStartup failed: %d\n", iResult); return 1; } struct addrinfo *result = NULL, *ptr = NULL, hints; ZeroMemory(&hints, sizeof(hints)); hints.ai_family = AF_INET; hints.ai_socktype = SOCK_STREAM; hints.ai_protocol = IPPROTO_TCP; #define DEFAULT_PORT "80" //Resolve the server address and port iResult = getaddrinfo(argv[1], DEFAULT_PORT, &hints, &result); if(iResult != 0){ printf("getaddrinfo failed: %d\n", iResult); WSACleanup(); return 1; } SOCKET ConnectSocket = INVALID_SOCKET; //Attempt to connect to the first address returned by //the call to getaddrinfo ptr = result; //Create a SOCKET for connecting to server ConnectSocket = socket(ptr->ai_family, ptr->ai_socktype, ptr->ai_protocol); if(ConnectSocket == INVALID_SOCKET){ printf("Error at socket(): %ld\n", WSAGetLastError()); freeaddrinfo(result); WSACleanup(); return 1; } //Connect to server iResult = connect(ConnectSocket, ptr->ai_addr, (int)ptr->ai_addrlen); if(iResult == SOCKET_ERROR){ closesocket(ConnectSocket); ConnectSocket = INVALID_SOCKET; } //Should really try the next address returned by getaddrinfo //if the connect call failed //But for this simple example we just free the resources //returned by getaddrinfo and print an error message freeaddrinfo(result); if(ConnectSocket == INVALID_SOCKET){ printf("Unable to connect to server!\n"); WSACleanup(); return 1; } #define DEFAULT_BUFLEN 512 int recvbuflen = DEFAULT_BUFLEN; char *sendbuf = "GET /index.html HTTP/1.1\r\n"; char recvbuf[DEFAULT_BUFLEN]; //Send an initial buffer iResult = send(ConnectSocket, sendbuf, (int)strlen(sendbuf), 0); if(iResult == SOCKET_ERROR){ printf("send failed: %d\n", WSAGetLastError()); closesocket(ConnectSocket); WSACleanup(); return 1; } printf("Bytes Sent: %ld\n", iResult); //shutdown the connection for sending since no more data will be sent //the client can still use the ConenctSocket for receiving data iResult = shutdown(ConnectSocket, SD_SEND); if(iResult == SOCKET_ERROR){ printf("shutdown failed: %d\n", WSAGetLastError()); closesocket(ConnectSocket); WSACleanup(); return 1; } do { iResult = recv(ConnectSocket, recvbuf, recvbuflen, 0); if(iResult > 0){ printf("Bytes received: %d\n", iResult); printf(recvbuf); printf("\n\n"); } else if(iResult == 0){ printf("Connection closed\n"); } else { printf("recv failed: %d\n", WSAGetLastError()); } } while(iResult > 0); //cleanup closesocket(ConnectSocket); WSACleanup(); return 0; } </code></pre> <p>Thanks in advance.</p>

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