Unicode C++

Send a Staged REST Request from a StringBuilder

Demonstrates Rest.SendReqSb, which sends a request whose text body is read from a StringBuilder, then reads the response in separate steps.

Background. The staged request model separates sending from reading: a SendReq method transmits the request, ReadResponseHeader reads the status line and headers, and a ReadResp method reads the body. This gives fine control over large or streamed messages compared with the single-call full-request methods.

Chilkat Unicode C++ Downloads

Download Chilkat for Unicode C++

Unicode C++

#include <CkRestW.h>
#include <CkStringBuilderW.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkRestW rest;
    bool bTls = true;
    bool bAutoReconnect = true;
    success = rest.Connect(L"example.com",443,bTls,bAutoReconnect);
    if (success == false) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    rest.AddHeader(L"Content-Type",L"application/json");

    //  Send a request whose text body is read from a StringBuilder.
    CkStringBuilderW sbBody;
    sbBody.Append(L"{ \"query\": \"chilkat\" }");
    success = rest.SendReqSb(L"POST",L"/api/search",sbBody);
    if (success == false) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    //  After sending, read the response status line and header fields.  The return value is the HTTP
    //  status code, or -1 if no response was received.
    int statusCode = rest.ReadResponseHeader();
    if (statusCode < 0) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    wprintf(L"Response status code: %d\n",statusCode);

    //  Read the response body as text.
    const wchar_t *responseBody = rest.readRespBodyString();
    if (rest.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    wprintf(L"%s\n",responseBody);
    }