libcurl8.9.1 上传json

在postman中 PUT----》body----》raw----》json

 结构体定义：

#define MAX_ARRAY_SIZE      5*1024*1024struct SMART_DATA_CACHE
{char* buf;long dwTotalLen;SMART_DATA_CACHE(){dwTotalLen = 0;buf = nullptr;while (!buf) {try {buf = new char[MAX_ARRAY_SIZE];}catch (...) {}}memset(buf, 0x00, MAX_ARRAY_SIZE);}~SMART_DATA_CACHE(){if (buf) {delete[] buf;buf = nullptr;dwTotalLen = 0;}}
};

接收服务器返回信息的函数：

size_t ManageCurl::http_recv_cb(void* ptr, size_t size, size_t nmemb, void* stream)
{SMART_DATA_CACHE* pDataBuf = (SMART_DATA_CACHE*)stream;if (pDataBuf) {if (pDataBuf->buf) {if (pDataBuf->dwTotalLen + size * nmemb < MAX_ARRAY_SIZE) {memcpy(pDataBuf->buf + pDataBuf->dwTotalLen, ptr, size * nmemb);pDataBuf->dwTotalLen += size * nmemb;}}}return size * nmemb;
}

通过libcurl代码方式：

bool ManageCurl::http_UploadClassID(const char* pUrl, const char* pInfo/*json*/, long nTimeout, SMART_DATA_CACHE& stRecv)
{bool bResult = false;//memset(stRecv.buf, 0, MAX_ARRAY_SIZE);stRecv.dwTotalLen = 0;//CURL* curl = curl_easy_init();if (curl) {struct curl_slist* http_header = NULL;//http_header = curl_slist_append(http_header, "Expect:");//http_header = curl_slist_append(http_header, "User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/534.3 (KHTML, like Gecko) Chrome/6.0.472.63 Safari/534.3");http_header = curl_slist_append(http_header, "Charset: UTF-8");http_header = curl_slist_append(http_header, "Connection: keep-alive");//保持长连接http_header = curl_slist_append(http_header, "Content-Type: application/json");//保持长连接curl_easy_setopt(curl, CURLOPT_HTTPHEADER, http_header);//修改协议头curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, http_recv_cb);//设置接收回调curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void*)&stRecv);//设置设置参数curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 10);//设置连接时的超时时间为5秒curl_easy_setopt(curl, CURLOPT_TIMEOUT, nTimeout);//超时秒为单位curl_easy_setopt(curl, CURLOPT_URL, pUrl);//指定URLcurl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "PUT"); /* !!! */curl_easy_setopt(curl, CURLOPT_POSTFIELDS, pInfo); /* data goes here */CURLcode res = curl_easy_perform(curl);//执行long nRet = 0;CURLcode codeRet = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &nRet);if (codeRet == CURLE_OK && nRet == 200) {bResult = true;}curl_easy_cleanup(curl);curl_slist_free_all(http_header);}return bResult;
}