(C) Send HTTP POST using non-UTF8 such as Windows-1250

Demonstrates how to specify the character encoding (charset) to be used for the body of an HTTP POST.

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#include <C_CkHttp.h>
#include <C_CkHttpRequest.h>
#include <C_CkJsonObject.h>
#include <C_CkHttpResponse.h>

void ChilkatSample(void)
    {
    HCkHttp http;
    HCkHttpRequest req;
    HCkJsonObject json;
    BOOL success;
    HCkHttpResponse resp;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    http = CkHttp_Create();

    req = CkHttpRequest_Create();

    // Load a JSON file containing strings with Polish chars.
    json = CkJsonObject_Create();
    success = CkJsonObject_LoadFile(json,"qa_data/json/has_polish_chars.json");
    if (success == FALSE) {
        printf("%s\n",CkJsonObject_lastErrorText(json));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkJsonObject_Dispose(json);
        return;
    }

    // Add the request params expected by the server-side:
    CkHttpRequest_AddParam(req,"tytul",CkJsonObject_stringOf(json,"tytul"));
    CkHttpRequest_AddParam(req,"tresc",CkJsonObject_stringOf(json,"tresc"));

    // Indicate we wish to explicitly send the charset attribute in the HTTP request header.
    CkHttpRequest_putSendCharset(req,TRUE);

    // Send the POST
    // You can send the POST to the URL below.  It will respond with the request body in quoted-printable format.
    // Using quoted-printable, we can easily see the binary bytes for the accented chars.

    resp = CkHttp_PostUrlEncoded(http,"https://www.chilkatsoft.com/echoPost.cshtml",req);
    if (CkHttp_getLastMethodSuccess(http) != TRUE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkJsonObject_Dispose(json);
        return;
    }

    printf("%s\n",CkHttp_lastHeader(http));
    printf("%s\n",CkHttpResponse_bodyStr(resp));

    // Sample output:

    // --------------------------------------------------
    // POST /echoPost.cshtml HTTP/1.1
    // Host: www.chilkatsoft.com
    // Content-Type: application/x-www-form-urlencoded; charset=utf-8
    // Content-Length: 79
    // 
    // <pre>tytul=3DPrzyk%C5%82ad&amp;tresc=3DPrzyk%C5%82ad
    // %82oszenie</pre>
    // --------------------------------------------------

    // We can see by the %C5%82 that utf-8 was sent, because %C5%82 is the 2-byte representation of a particular Polish char.

    CkHttpResponse_Dispose(resp);

    // -----------------------
    // However.. we can change the charset used for the HTTP request by specifying the request object's charset.

    CkHttpRequest_putSendCharset(req,TRUE);
    CkHttpRequest_putCharset(req,"windows-1250");

    resp = CkHttp_PostUrlEncoded(http,"https://www.chilkatsoft.com/echoPost.cshtml",req);
    if (CkHttp_getLastMethodSuccess(http) != TRUE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkJsonObject_Dispose(json);
        return;
    }

    printf("%s\n",CkHttp_lastHeader(http));
    printf("%s\n",CkHttpResponse_bodyStr(resp));

    // Sample output...
    // You can see how the bytes used for the Polish chars are now 1-byte per char (i.e. using Windows-1250) 

    // --------------------------------------------------
    // POST /echoPost.cshtml HTTP/1.1
    // Host: www.chilkatsoft.com
    // Content-Type: application/x-www-form-urlencoded; charset=windows-1250
    // Content-Length: 70
    // 
    // <pre>tytul=3DPrzyk%B3ad&amp;tresc=3DPrzyk%B3ad
    // e</pre>
    // --------------------------------------------------

    CkHttpResponse_Dispose(resp);


    CkHttp_Dispose(http);
    CkHttpRequest_Dispose(req);
    CkJsonObject_Dispose(json);

    }