B4X

Send HTTP POST using non-UTF8 such as Windows-1250

See more HTTP Examples

Demonstrates how to specify the character encoding (charset) to be used for the body of an HTTP POST. B4X

Dim success As Boolean = False

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

Dim http As ChilkatHttp
http.Initialize("http")

Dim req As ChilkatHttpRequest
req.Initialize

'  Load a JSON file containing strings with Polish chars.
Dim json As ChilkatJsonObject
json.Initialize
success = json.LoadFile("qa_data/json/has_polish_chars.json")
If success = False Then
    Log(json.LastErrorText)
    Return
End If


'  Add the request params expected by the server-side:
req.AddParam("tytul", json.StringOf("tytul"))
req.AddParam("tresc", json.StringOf("tresc"))

'  Indicate we wish to explicitly send the charset attribute in the HTTP request header.
req.SendCharset = 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.

req.HttpVerb = "POST"
req.ContentType = "application/x-www-form-urlencoded"

Dim resp As ChilkatHttpResponse
resp.Initialize
success = http.HttpReq("https://www.chilkatsoft.com/echoPost.cshtml", req, resp)
If success = False Then
    Log(http.LastErrorText)
    Return
End If


Log(http.LastHeader)
Log(resp.BodyStr)

'  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.

req.SendCharset = True
req.Charset = "windows-1250"
req.HttpVerb = "POST"
req.ContentType = "application/x-www-form-urlencoded"

success = http.HttpReq("https://www.chilkatsoft.com/echoPost.cshtml", req, resp)
If success = False Then
    Log(http.LastErrorText)
    Return
End If


Log(http.LastHeader)
Log(resp.BodyStr)

'  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>
'  --------------------------------------------------