php - 向 C 或 C++ 中的 Php 代码发送 Http "Post"请求

Question

我正在尝试向我的 php 文件发送一个“post”请求并取回信息，它工作正常，但是

它还会在打印我对 php 文件的响应之前打印一些内容。这是它打印的内容

首先:

HTTP/1.1 200 OK
Date: Fri, 20 Apr 2012 10:19:12 GMT
Server: Apache/2.2.21 (Unix) mod_ssl/2.2.21 OpenSSL/0.9.8r DAV/2 PHP/5.3.6
X-Powered-By: PHP/5.3.6
Content-Length: 12
Connection: close
Content-Type: text/html

and then my response:

hello world

how can i only print what i'm getting from myphp code, without:

HTTP/1.1 200 OK
Date: Fri, 20 Apr 2012 10:19:12 GMT
Server: Apache/2.2.21 (Unix) mod_ssl/2.2.21 OpenSSL/0.9.8r DAV/2 PHP/5.3.6
X-Powered-By: PHP/5.3.6
Content-Length: 12
Connection: close
Content-Type: text/html

the code i'm using is:

#include <arpa/inet.h>
#include <assert.h>
#include <errno.h>
#include <netinet/in.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netdb.h>
#include <unistd.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);  // <-- this
    }
    return n;

}





int main(void)
{



    int sockfd;
    struct sockaddr_in servaddr;

    char **pptr;
    //********** You can change. Puy any values here *******
    char *hname = "localhost";
    char *page = "/mysql_update.php";
    char *poststr = "server=dd sd sdsdt\n";
    //*******************************************************

    char str[50];
    struct hostent *hptr;
    if ((hptr = gethostbyname(hname)) == NULL) {
        fprintf(stderr, " Server down 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));
    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);


}

请帮助我解决这个问题，一步一步让我能理解它，给我信息，如果你能给我举个例子的话。 (这将帮助我和其他人)

Answer 1

您收到的响应的第一部分由 HTTP 版本、服务器响应状态代码和各种 HTTP 响应 header 组成。

HTTP/1.1 200 OK Date: Fri, 20 Apr 2012 10:19:12 GMT Server: Apache/2.2.21 (Unix) mod_ssl/2.2.21 OpenSSL/0.9.8r DAV/2 PHP/5.3.6 X-Powered-By: PHP/5.3.6 Content-Length: 12 Connection: close Content-Type: text/html

在 header 之后跟随 HTTP 响应主体(您需要提取):

hello world

HTTP header 和主体由以下字符序列分隔:\r\n\r\n。因此，您需要做的就是搜索它并提取其背后的所有内容。

你可以自己做(套接字、解析...)，但我的建议是使用一些 HTTP 库:WinInet、WinHttp(都是 Microsoft 的)或libCurl(开源)。