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HTTP – Invalid Server Response

Solved922 views16th April 2023HTTP error
6
Greisen Gustiantoro [DevOps Member]420 3rd April 2023 0 Comments

Hi Dojo,

I am trying to create an HTTP connector by following Mieke video, I can get a response for a certain page, however when the response contains "135?2289?83?476010?0?0?0?0?0?0?1?" it gets an error

Fiddler show me this

What could be wrong?

Regards

Greisen Gustiantoro [DevOps Member] Selected answer as best 16th April 2023

1 Answer

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Jeroen Neyt [SLC] [DevOps Advocate]2.31K Posted 3rd April 2023 2 Comments

ERROR_WINHTTP_INVALID_SERVER_RESPONSE is being returned when WinHTTP (the HTTP engine that is being used by DataMiner connectors) is unable to parse the server response.

The response consists of the the actual payload and the response headers. I believe that in your case there might be something off with the latter.

Looking at what gets returned in Fiddler, the Content-Type header value contains some unexpected value. While Fiddler is still able to parse the payload, it might be that WinHTTP is struggling to do so.

Do you see the same value in that header when you're succesfully retrieving the response from the other page?

Greisen Gustiantoro [DevOps Member] Selected answer as best 16th April 2023
Greisen Gustiantoro [DevOps Member] commented 4th April 2023

Hi Jeroen,

For another successful page, I see common values like Content-Type: text/html, etc.
Understood it was the HTTP engine issue, do you have any tips and tricks to resolve this?

Regards,

Jeroen Neyt [SLC] [DevOps Advocate] commented 4th April 2023

If for the other pages, the Content-Type is correctly filled in, it’s most likely that will indeed be the root cause of why the response can’t be parsed.

Which webserver software are you using to serve these pages? Typically you can configure MIME types which map a certain extension to a content type. (e.g. .html => text/html).

For example in below article is described how you can configure it in IIS: https://learn.microsoft.com/en-us/iis/configuration/system.webserver/staticcontent/mimemap

Do the other pages that you can successfully retrieve contain the same file extension?

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