如何实现客户端https post.
如何实现客户端https post.
基于openssl库或者curl库都可以.
知道curl库实现啦,可是不知道如何调用接口.
[解决办法]
curl的官方网站就带有不少例子
http://curl.haxx.se/docs/
[解决办法]
/*------------------------------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 = size * nmemb;
if ( wr_index + segsize > MAX_BUF ) {
userp[0] = 0;
return 0;
}
/* copy the data from the curl buffer into our buffer */
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
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);
}
