Fiddler Ideas

The free web debugging proxy for any browser, system or platform.

HAR issue - some responses cannot be decrypted

Some responses cannot be decrypted.

Sample HAR file: https://mega.nz/#!pBUhCAxb!HF7wahVT1RJog9dHNc3NQji5nZ3BNrVFzrkWJ1GI1S0

for example, search for: lrR/zv7/RNCaLj/9XY472V/Z1yMyt/KYbZU/Og8JiI/

It is readable in Chrome dev tools

the same request in https://toolbox.googleapps.com/apps/har_analyzer/

  • Guest
  • Jun 14 2018
  • Needs review
Bug
  • Attach files
  • Eric Lawrence commented
    June 15, 2018 22:00

    The problem here is that HAR file captured drops a critical HTTP response header:

                {
                  "name": "Content-Encoding",
                  "value": "gzip"
                },

    If you add this header back to the response (e.g. use F2 to enable editing, then use the Headers inspector to add it), then the response can be properly decompressed by Fiddler. If you reissue the request to the original server (just select the request line in Fiddler and tap R) you will see that the server includes the necessary header.

    You should file a bug against the tool that generated this HAR file.

  • Guest commented
    June 16, 2018 08:46

    Ok, thanks.