(Unicode C++) URL Encoding Charset in POST Query Params

Demonstrates how to control the URL encoding charset in POST query params.

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#include <CkStringBuilderW.h>
#include <CkHttpW.h>
#include <CkHttpRequestW.h>
#include <CkHttpResponseW.h>

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

    // We have the string "MÆRSK".
    const wchar_t *nameWin1252Encoded = L"M%E6RSK";

    // Note: The DecodeAndAppend method is newly added in Chilkat v9.5.0.87
    CkStringBuilderW sb;
    bool success = sb.DecodeAndAppend(nameWin1252Encoded,L"url",L"windows-1252");

    CkHttpW http;

    // We're setting the session log filename so we can see the exact request sent.
    http.put_SessionLogFilename(L"qa_output/sessionLog.txt");

    // First demonstrate a simple application/x-www-form-urlencoded POST

    CkHttpRequestW req;

    // Set the Charset = "utf-8" to cause URL encoding to use utf-8.
    req.put_Charset(L"utf-8");

    req.AddParam(L"name",sb.getAsString());

    CkHttpResponseW *resp = http.PostUrlEncoded(L"https://www.chilkatsoft.com/something",req);
    if (http.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    // This is the request that is sent:
    // Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6)

    // 	POST /something HTTP/1.1
    // 	Host: www.chilkatsoft.com
    // 	Content-Type: application/x-www-form-urlencoded
    // 	Content-Length: 15
    // 
    // 	name=M%C3%A6RSK

    delete resp;

    // ---------------------------------------------------------------
    // Switch to windows-1252

    req.put_Charset(L"windows-1252");

    resp = http.PostUrlEncoded(L"https://www.chilkatsoft.com/something",req);
    if (http.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    // This is the request that is sent:
    // Notice that windows-1252 is used in the query param (the letter 'Æ' is %E6)

    // 	POST /something HTTP/1.1
    // 	Host: www.chilkatsoft.com
    // 	Content-Type: application/x-www-form-urlencoded
    // 	Content-Length: 12
    // 
    // 	name=M%E6RSK

    delete resp;

    // ---------------------------------------------------------------
    // Let's do the same with SynchronousRequest, switching back to utf-8

    req.put_Path(L"/something");
    req.put_HttpVerb(L"POST");
    req.put_ContentType(L"application/x-www-form-urlencoded");

    req.put_Charset(L"utf-8");

    resp = http.SynchronousRequest(L"www.chilkatsoft.com",443,true,req);
    if (http.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    // This is the request that is sent:
    // Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6)

    // 	POST /something HTTP/1.1
    // 	Host: www.chilkatsoft.com
    // 	Content-Type: application/x-www-form-urlencoded
    // 	Content-Length: 15
    // 
    // 	name=M%C3%A6RSK

    delete resp;

    // ---------------------------------------------------------------
    // Let's do a PostXml where the query params are in the HTTP request start line, 
    // and the Content-Type is text/xml where the body of the request is XML.

    req.put_Path(L"/something");
    req.put_HttpVerb(L"POST");
    req.put_ContentType(L"text/xml");
    success = req.LoadBodyFromString(L"<test>123</test>",L"utf-8");
    req.put_Charset(L"utf-8");

    // Remember... our request object still contains the query param added in the above call to AddParam.

    resp = http.SynchronousRequest(L"www.chilkatsoft.com",443,true,req);
    if (http.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    // This is the request that is sent:
    // Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6)

    // 	POST /something?name=M%C3%A6RSK HTTP/1.1
    // 	Host: www.chilkatsoft.com
    // 	Content-Type: text/xml
    // 	Content-Length: 16
    // 
    // 	<test>123</test>

    delete resp;
    }