Set a Multipart Part Body from a StringBuilder

Demonstrates Rest.SetMultipartBodySb, which sets the text body of the selected multipart part from a StringBuilder.

Background. A multipart request is assembled part by part: the part selector chooses the part being built, header fields describe it, and a SetMultipartBody method supplies its content. The request is then sent with a multipart send or full-request method.

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#include <C_CkRest.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkRest rest;
    BOOL bTls;
    BOOL bAutoReconnect;
    HCkStringBuilder sbBody;
    const char *responseText;

    success = FALSE;

    rest = CkRest_Create();
    bTls = TRUE;
    bAutoReconnect = TRUE;
    success = CkRest_Connect(rest,"example.com",443,bTls,bAutoReconnect);
    if (success == FALSE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        return;
    }

    //  Select the multipart part to build, and set its header fields.
    CkRest_putPartSelector(rest,"1");
    CkRest_AddHeader(rest,"Content-Disposition","form-data; name=\"field1\"");
    CkRest_AddHeader(rest,"Content-Type","application/json");

    //  Set the text body of the selected part from a StringBuilder.
    sbBody = CkStringBuilder_Create();
    CkStringBuilder_Append(sbBody,"{ \"key\": \"value\" }");
    success = CkRest_SetMultipartBodySb(rest,sbBody);
    if (success == FALSE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkStringBuilder_Dispose(sbBody);
        return;
    }

    responseText = CkRest_fullRequestMultipart(rest,"POST","/api/upload");
    if (CkRest_getLastMethodSuccess(rest) == FALSE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkStringBuilder_Dispose(sbBody);
        return;
    }

    printf("%s\n",responseText);


    CkRest_Dispose(rest);
    CkStringBuilder_Dispose(sbBody);

    }