Modify stream value failed, 0xfe was decoded to 0xc3 0xbe

[ma]

Hi,

I want to modify the response body value which is stream, but failed.

The stream value is just like MP4, the ascii of head data is "00 00 00 20 66 74 79 70 69 73 6F 6D...".

And I planed to modify them to "FE FE FE FE FE FE FE ....". But when I check the sent data, I found them were changed to "C3 BE C3 BE C3 BE C3 BE C3 BE C3 BE ..."

The following is my JScript code:

var oBody;
oBody = "\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe\xfe";
oSession.utilReplaceRegexInResponse("ftypisom.*",oBody);

// oSession.utilSetResponseBody(oBody);                    // I tried this but failed too...

How could I set response body to any ascii.

Thanks :)

[Eric R | Senior Technical Support Engineer]

Hi Ma,

Unfortunately, streamed Responses and Requests cannot be modified using Fiddler's Inspectors. This is because Fiddler must buffer messages before passing them along to their destinations. Additionally, when streaming is enabled for a response, each block of data read from the server is immediately passed to the client application. Note that audio and video responses are streamed automatically.

If you need to modify the response before it is sent to the client, you must disable streaming by setting oSession.bBufferResponse=truein either the OnBeforeRequestor OnPeekAtResponseHeadershandlers.

I hope this helps. Please let me know if you have any additional questions. Thank you for using the Fiddler Forums.

Regards,

Eric R | Technical Support Engineer
Progress Telerik

[ma]

OK，Thank you for your answer, I don't have any questions:)

Regards