(PureBasic) 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.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkHttpResponse.pb"
IncludeFile "CkHttp.pb"
IncludeFile "CkJsonObject.pb"
IncludeFile "CkHttpRequest.pb"

Procedure ChilkatExample()

    success.i = 0

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

    http.i = CkHttp::ckCreate()
    If http.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    req.i = CkHttpRequest::ckCreate()
    If req.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; Load a JSON file containing strings with Polish chars.
    json.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkJsonObject::ckLoadFile(json,"qa_data/json/has_polish_chars.json")
    If success = 0
        Debug CkJsonObject::ckLastErrorText(json)
        CkHttp::ckDispose(http)
        CkHttpRequest::ckDispose(req)
        CkJsonObject::ckDispose(json)
        ProcedureReturn
    EndIf

    ; Add the request params expected by the server-side:
    CkHttpRequest::ckAddParam(req,"tytul",CkJsonObject::ckStringOf(json,"tytul"))
    CkHttpRequest::ckAddParam(req,"tresc",CkJsonObject::ckStringOf(json,"tresc"))

    ; Indicate we wish to explicitly send the charset attribute in the HTTP request header.
    CkHttpRequest::setCkSendCharset(req, 1)

    ; 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.

    CkHttpRequest::setCkHttpVerb(req, "POST")
    CkHttpRequest::setCkContentType(req, "application/x-www-form-urlencoded")

    resp.i = CkHttpResponse::ckCreate()
    If resp.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkHttp::ckHttpReq(http,"https://www.chilkatsoft.com/echoPost.cshtml",req,resp)
    If success = 0
        Debug CkHttp::ckLastErrorText(http)
        CkHttp::ckDispose(http)
        CkHttpRequest::ckDispose(req)
        CkJsonObject::ckDispose(json)
        CkHttpResponse::ckDispose(resp)
        ProcedureReturn
    EndIf

    Debug CkHttp::ckLastHeader(http)
    Debug CkHttpResponse::ckBodyStr(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.

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

    CkHttpRequest::setCkSendCharset(req, 1)
    CkHttpRequest::setCkCharset(req, "windows-1250")
    CkHttpRequest::setCkHttpVerb(req, "POST")
    CkHttpRequest::setCkContentType(req, "application/x-www-form-urlencoded")

    success = CkHttp::ckHttpReq(http,"https://www.chilkatsoft.com/echoPost.cshtml",req,resp)
    If success = 0
        Debug CkHttp::ckLastErrorText(http)
        CkHttp::ckDispose(http)
        CkHttpRequest::ckDispose(req)
        CkJsonObject::ckDispose(json)
        CkHttpResponse::ckDispose(resp)
        ProcedureReturn
    EndIf

    Debug CkHttp::ckLastHeader(http)
    Debug CkHttpResponse::ckBodyStr(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>
    ; --------------------------------------------------


    CkHttp::ckDispose(http)
    CkHttpRequest::ckDispose(req)
    CkJsonObject::ckDispose(json)
    CkHttpResponse::ckDispose(resp)


    ProcedureReturn
EndProcedure