Request body encoding

[Alex]

Hi,

I have a flash application that sends flex messages to the server using POST request with application/x-amf content-type.

following piece of code:

        private static void FiddlerApplication_BeforeRequest(Session oSession)
        {
            if (oSession.oRequest.headers.ExistsAndEquals("Content-Type", "application/x-amf"))
            {
                Encoding enc = oSession.GetRequestBodyEncoding(); //we can use Encoding.UTF8..... doesn't matter - same result
                string reqBody = enc.GetString(oSession.requestBodyBytes);
                oSession.requestBodyBytes = enc.GetBytes(reqBody);
            }
        }

WOW!!! In a response i see next:

Headers:

HTTP/1.1 200 OK
Date: Fri, 25 Dec 2015 00:00:26 GMT
Server: Apache
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 275
Connection: close
Content-Type: application/x-amf;charset=utf-8

 and body:

..some content...//Unknown AMF type '-65'.

Buf���
/Client.Message.Encoding....

 

So the server doesn' t like my harmless operation. But i can't understand. I think i did nothing with request body actually.

[Alex]

Oh, my mistake.

For a safely convertion i have to use base64 encoding at least.

Another way - convert bytes array into a HEX string for example.

[Eric Lawrence]

Hi, Alex--

I'm not sure if you're asking a question or not, but generally speaking, no, you can't treat a binary body like a string and expect that it won't be corrupted. oSession.requestBodyBytes is a byte array and should be kept as a byte array when interoperating with binary formats. The helper method oSession.GetRequestBodyAsString() should be used when you know that the body is plaintext.

Regards,
Eric Lawrence
Telerik