想在 windows7 中使用 c 进行客户端-服务器编程,它应该使用 http POST 方法将字符串发送到服务器。POST 方法中的参数应包括 ip-address 等:
我从http://souptonuts.sourceforge.net/code/http_post.c.html获得了这段代码,并将其更改为在 Windows 上运行它,但仍然出现 1 个错误:
#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);
}
MinGW 编译器出现的错误是:
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