C++

Send a Staged Multipart REST Request

Demonstrates Rest.SendReqMultipart, which sends a multipart request using the parts configured on the object, 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.

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C++

#include <CkRest.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkRest rest;
    bool bTls = true;
    bool bAutoReconnect = true;
    success = rest.Connect("example.com",443,bTls,bAutoReconnect);
    if (success == false) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    //  Configure one multipart part before sending.
    rest.put_PartSelector("1");
    rest.AddHeader("Content-Type","text/plain");
    rest.AddHeader("Content-Disposition","form-data; name=\"field1\"");
    success = rest.SetMultipartBodyString("value1");
    if (success == false) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    //  Send the multipart request using the configured parts.
    success = rest.SendReqMultipart("POST","/api/upload");
    if (success == false) {
        std::cout << rest.lastErrorText() << "\r\n";
        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) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Response status code: " << statusCode << "\r\n";

    //  Read the response body as text.
    const char *responseBody = rest.readRespBodyString();
    if (rest.get_LastMethodSuccess() == false) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    std::cout << responseBody << "\r\n";
    }