Question

怎么实现客户端https post

Answer 1

/*------------------------------load_date--------------------------------------------
*
*func:receive the date from the server and save it to the userp
*@param userp :the buffer used to save the date receive from server
*return the size of the string receive
--------------------------------------------------------------------------------------*/
size_t load_date( void *buffer, size_t size, size_t nmemb, char *userp ) 
{ //处理接收到数据的回调函数，其中buffer就是    curl_easy_setopt(curl,CURLOPT_WRITEDATA,
  //wr_buf); 这句传进来的参数wr_buf用来保存数据
 
    int  wr_index=0; 
    size_t segsize 肢拦逗= size * nmemb; 
    if ( wr_index + segsize > MAX_BUF ) { 
        userp[0] = 0; 
        return 0; 
    } 
 
    /* copy the data from the curl buffer into our buffer */ 
  衡岁  memcpy( static_cast<void *>(&userp[wr_index]), buffer, segsize ); 
 
    /* update the write index */ 
    wr_index += static_cast<int>(segsize); 
 
    /* null terminate the buffer */ 
    userp[wr_index] = 0;
    printf("%s",userp);
    /* return the number of bytes received, indicating to curl that all is okay */ 
    return segsize; 
} 
 
/*------------------------------load_header--------------------------------------------
*
*func:receive the header date from the server and save it to the file stream
*@param stream :the temp file used to save the header date receive from the server
*return the size of the string receive
--------------------------------------------------------------------------------------*/
size_t load_header( void *buffer, size_t size, size_t nmemb, FILE *stream ) 
{ //这个是处理接收到的HTTP头的处理回调函数我这里是把头写到文件当中
 
   历卖 return fwrite(buffer,size,nmemb,stream);
} 
 
/*------------------------------send_https--------------------------------------------
*
*@func:encapsulate the package and send it to the server 
*@param url :the server address
*@param http_headers :the header of the request
*@param poststring :the post parameter of the request
*@param timeout :the timeout
*@return the error code
--------------------------------------------------------------------------------------*/
int send_https(const char *url, curl_slist *http_headers, const char *poststring,unsigned long timeout,char * wr_buf)
{
    CURLcode ret;
    int error_code=SUCEED_OK;
    static const char *headerfilename = "head.out";  
    FILE *headerfile;
    headerfile = fopen(headerfilename,"wb");
    if (headerfile == NULL) {
        return -1;
    }
 
    if(!curl)  return ERROR_CURL_INITIALFALIED;
    //调置HTTP请求包的头，这里当参数传入 
    curl_easy_setopt(curl,CURLOPT_HTTPHEADER,http_headers);
    //开启OPENSSL通道，允许接收HTTPS协议 
     curl_easy_setopt(curl,CURLOPT_SSL_VERIFYPEER,0L);
    curl_easy_setopt(curl,CURLOPT_SSL_VERIFYHOST,0L);   
    //设置要访问的URL 
    curl_easy_setopt(curl,CURLOPT_URL, url);
    //设置要post的数据 
    curl_easy_setopt(curl,CURLOPT_POSTFIELDS,poststring);
    //设置连接超时   
    curl_easy_setopt(curl,CURLOPT_CONNECTTIMEOUT,timeout);
    //设置数据接收缓冲区，这个要看回调函数处理 
    curl_easy_setopt(curl,CURLOPT_WRITEDATA, wr_buf); 
    //设置数据接收回调函数 
    curl_easy_setopt(curl,CURLOPT_WRITEFUNCTION,load_date); 
    //设置HTTP头数据处理回调函数 
    curl_easy_setopt(curl,CURLOPT_HEADERFUNCTION,load_header);
    //设置HTTP头数据接收缓冲，这里是文件 
    curl_easy_setopt(curl,CURLOPT_WRITEHEADER,headerfile);
    ret = curl_easy_perform(curl);
    if ( ret == 0 ) 
    {
        int error_code=SUCEED_OK;
    }
    else 
    {
        switch(ret)
        {
        case CURLE_COULDNT_CONNECT:
            {
                printf("ERROR:TimeOut can't connect to the host.\n");
                error_code=ERROR_CURL_TIMEOUT;
                break;
            }
        case CURLE_HTTP_RETURNED_ERROR:
            {
                printf("ERROR:HTTP return false.");
                error_code=ERROR_CURL_HTTPFALSE;
                break;
            }
        case CURLE_SSL_ENGINE_INITFAILED:
            {
                printf("ERROR:SSL can't be initialized.");
                error_code=ERROR_CURL_SSLINITFAILED;
                break;
            }
        case CURLE_COULDNT_RESOLVE_HOST:
            {
                printf("ERROR:SSL can't create ssl connection.");
                error_code=ERROR_CURL_SSLINITFAILED;
                break;
            }
        default:
            {
                printf("ERROR:correspond failed.");
                error_code=ERROR_FAILED_SEND;
            }
        }
    }
    fclose(headerfile);
    if(error_code == SUCEED_OK)
        error_code =parase_rev(wr_buf);//这一句是处理接收到的数据 
    strCheckSum = getChecksum(strUserID.c_str(),strPID.c_str(),strFirmStr.c_str());   
     
    return error_code;
}
int main()
{
    char wr_buf[65530];
    //初始化HTTP请求头 
    curl_slist *headers=NULL; /* init to NULL is important */
    headers = curl_slist_append(headers, "Accept-Language: zh-cn");
    headers = curl_slist_append(headers, "User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30)");
    headers = curl_slist_append(headers, "Content-Type: text/xml");
    headers = curl_slist_append(headers, "Connection:");
    send_https("www.baidu.com",headers,"eeeeeeeeeee",1000,wr_buf);
}

Answer 2

{
printf("升好ERROR:HTTP return false.");
error_code=ERROR_CURL_HTTPFALSE;
break;
}
case CURLE_SSL_ENGINE_INITFAILED:
{
printf("ERROR:SSL can't be initialized.");
error_code=ERROR_CURL_SSLINITFAILED;
break;
}
case CURLE_COULDNT_RESOLVE_HOST:
{
printf("ERROR:SSL can't create ssl connection.");
error_code=ERROR_CURL_SSLINITFAILED;
break;
}
default:
{
printf("ERROR:correspond failed.");
error_code=ERROR_FAILED_SEND;
}
}
}
fclose(headerfile);
if(error_code == SUCEED_OK)
error_code =parase_rev(wr_buf);//这早和一句是处理接收到的数据
strCheckSum = getChecksum(strUserID.c_str(),strPID.c_str(),strFirmStr.c_str());

return error_code;
}
int main()
{
char wr_buf[65530];
//初始化HTTP请求头
curl_slist *headers=NULL; /* init to NULL is important */
headers = curl_slist_append(headers, "Accept-Language: zh-cn");
headers = curl_slist_append(headers, "User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30)");
headers = curl_slist_append(headers, "Content-Type: text/xml");
headers = curl_slist_append(headers, "Connection:");
send_https("www.baidu.com",headers,"eeeeeeeeeee",1000,wr_buf);
}

这只是把原来我写过的一个程序进行节选
其中一些返回码如ERROR_FAILED_SEND这些，是要自己定义陆笑盯的