c++ - 通过 HttpOpenRequest 发送 JSON 数据

Question

我不会用 C++ 编程，但我想找会做的人，所以如果我的问题很简单或愚蠢，我很抱歉。

我需要一个使用 HttpOpenRequest/HttpSendRequest 对象的简单示例，以便将 JSON 数据发送到某些 Web 服务/站点。

谢谢

Answer 1

这是一个非常简单的示例，用于将 JSON 字符串发送到 http://hostname/path/scriptname。您必须根据需要添加适当的错误检查、状态代码检查等:

HINTERNET hInternet = InternetOpen(_T("MyApp"), INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);

HINTERNET hConnect = InternetConnect(hInternet, _T("hostname"), INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 0);

LPTSTR rgpszAcceptTypes[] = {_T("application/json"), NULL};
HINTERNET hRequest = HttpOpenRequest(hConnect, _T("POST"), _T("/path/scriptname"), NULL, NULL, rgpszAcceptTypes, 0, 0);

HttpAddRequestHeaders(hRequest, _T("Content-Type: application/json\r\n"), -1, HTTP_ADDREQ_FLAG_ADD);

char *JsonData = "..."; // your actual JSON data here
HttpSendRequest(hRequest, NULL, 0, JsonData, strlen(JsonData))

DWORD StatusCode = 0;
DWORD StatusCodeLen = sizeof(StatusCode);
HttpQueryInfo(hRequest, HTTP_QUERY_STATUS_CODE | HTTP_QUERY_FLAG_NUMBER, &StatusCode, &StatusCodeLen, NULL);

if (StatusCode == 200)
{
    // use InternetQueryDataAvailable() and InternetReadFile()
    // to read any response data as needed...
}

InternetCloseHandle(hRequest);
InternetCloseHandle(hConnect);
InternetCloseHandle(hInternet);