Send UTF-8/Unicode string using the WinHttp UDF

[ErikMrtn]

Hi everyone!

I'm trying to send a string (Filename in Arabic) as a post parameter to PHP using the WinHttp UDF. The problem i'm facing is that, at the server end, the string shows up as "Question Marks" and not in Arabic. 

However, if i send this string using the Winhttp Objects, it shows up properly in Arabic.

Is there any setting in the WinHttp UDF that i need to set before sending the post request, something that would send the post parameter as a UTF-8 string? The request being sent is over SSL, and im using the _WinHttpSimpleSendSSLRequest function.

here's the code im using.

expandcollapse popup

#NoTrayIcon
#include<Winhttp.au3>

$domain = "someserver.com"
$sPath = "/utf-echo.php"

Global $ua = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.10240"
$utfText = "مرحبا بالعالم.docx"
$postData = "utf=" & $utfText

;Using Winhttp Object
_httpRequestObj("https://" & $domain & $sPath ,'POST', $postData, $ua)

;Using Winhttp UDF
$hOpen = _WinHttpOpen($ua)
$hConnect = _WinHttpConnect($hOpen, $domain)
$hRequest = _WinHttpSimpleSendSSLRequest($hConnect, "POST", $sPath, Default, $postData, Default)


Func _httpRequestObj($url, $method, $postData, $ua)
    $oHTTP = ObjCreate('WinHTTP.WinHTTPRequest.5.1')
    $method = StringLower($method)
    Local $oHTTP = ObjCreate('WinHttp.WinHttpRequest.5.1')
    $oHTTP.Open($method, $url, False)
    $oHTTP.SetRequestHeader('User-Agent', $ua)
    $oHTTP.Option(4) = 13056
    $oHTTP.Option(9) = 168
    If $method = 'GET' Then
        $oHTTP.Send()
    Else
        $oHTTP.SetRequestHeader('Content-Type', 'application/x-www-form-urlencoded')
        $oHTTP.SetRequestHeader('Content-Length', StringLen($postData))
        $oHTTP.Send($postData)
    EndIf
    $oHTTP.WaitForResponse
    Local $ret[2]
    $ret["0"] = $oHTTP.Status
    $ret["1"] = $oHTTP.Responsetext
    Return $ret
EndFunc   ;==>_ProxyhttpRequest

Output at the server end:

Hope this explains the situation! Any help would be appreciated!

thanks!!

 

 

[jchd]

Convert $postdata (native UTF16-LE string) to UTF8 using _WinAPI_WideCharToMultiByte()

[Zedna]

Try to add charset to Content-Type RequestHeader like this (choose apropriate one, utf-16?):

$oHTTP.SetRequestHeader('Content-Type', 'application/x-www-form-urlencoded;charset=utf-8')

Edited March 16, 2018 by Zedna

[ErikMrtn]

@jchd Great!, thanks! this worked for me!

_WinAPI_WideCharToMultiByte($utfText,65001)

Although, i'd still be interested to know how this would work while uploading a file using _WinhttpSimpleFormFill() function from the Winhttp UDF... Any tips?