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POSocket programming in C using http post
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copied!<p>Want to do client-server programming using c in windows7, it should send string to server using http POST method. The paramater in POST method should include the ip-address etc:</p> <p>I got this code from <strong><a href="http://souptonuts.sourceforge.net/code/http_post.c.html" rel="nofollow">http://souptonuts.sourceforge.net/code/http_post.c.html</a></strong> and changed it for running it on windows, but still 1 error is coming:</p> <pre><code>#ifdef WIN32 #include <winsock2.h> #include <ws2tcpip.h> #include <windows.h> #else #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <unistd.h> #include <sys/wait.h> #include <netdb.h> #include <assert.h> #endif #include <stdio.h> #include <stdlib.h> #include <errno.h> #include <string.h> #include <signal.h> #include <ctype.h> #define SA struct sockaddr #define MAXLINE 4096 #define MAXSUB 200 #define LISTENQ 1024 extern int h_errno; ssize_t process_http(int sockfd, char *host, char *page, char *poststr) { char sendline[MAXLINE + 1], recvline[MAXLINE + 1]; ssize_t n; snprintf(sendline, MAXSUB, "POST %s HTTP/1.0\r\n" "Host: %s\r\n" "Content-type: application/x-www-form-urlencoded\r\n" "Content-length: %d\r\n\r\n" "%s", page, host, strlen(poststr), poststr); write(sockfd, sendline, strlen(sendline)); while ((n = read(sockfd, recvline, MAXLINE)) > 0) { recvline[n] = '\0'; printf("%s", recvline); } return n; } int main(void) { int sockfd; struct sockaddr_in servaddr; char **pptr; //********** You can change. Puy any values here ******* char *hname = "souptonuts.sourceforge.net"; char *page = "/chirico/test.php"; char *poststr = "mode=login&user=test&password=test\r\n"; //******************************************************* char str[50]; struct hostent *hptr; if ((hptr = gethostbyname(hname)) == NULL) { fprintf(stderr, " gethostbyname error for host: %s: %s", hname, hstrerror(h_errno)); exit(1); } printf("hostname: %s\n", hptr->h_name); if (hptr->h_addrtype == AF_INET && (pptr = hptr->h_addr_list) != NULL) { printf("address: %s\n", inet_ntop(hptr->h_addrtype, *pptr, str, sizeof(str))); } else { fprintf(stderr, "Error call inet_ntop \n"); } sockfd = socket(AF_INET, SOCK_STREAM, 0); // bzero(&servaddr, sizeof(servaddr)); memset(&servaddr, 0, sizeof(servaddr)); servaddr.sin_family = AF_INET; servaddr.sin_port = htons(80); inet_pton(AF_INET, str, &servaddr.sin_addr); connect(sockfd, (SA *) & servaddr, sizeof(servaddr)); process_http(sockfd, hname, page, poststr); close(sockfd); exit(0); } </code></pre> <p>The error which is coming on MinGW compiler is: </p> <pre><code>httppost.c:33:12: error: conflicting types for 'WSAGetLastError' In file included from httppost.c:5:0: c:\mingw\bin\../lib/gcc/mingw32/4.7.2/../../../../include/winsock2.h:594:32: n e: previous declaration of 'WSAGetLastError' was here </code></pre>

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