Illegal 'Last-Modified' header

[Leon Ma‏]

Hi,

For every request, I saw below log:

2015-03-12 16:44:32,417 WARN [akka.actor.default-dispatcher-4] HttpClientConnection akka://squbs/user/IO-HTTP/group-0/9123 Illegal response header: Illegal 'Last-Modified' header: Invalid input '+', expected "GMT" or "UTC" (line 1, pos 27):
Thu, 12 Mar 2015 23:44:32 +0000

Questions:

1. Is this format a real bad one? (Can not be recognized by browser?) Or just a strict validation in spray side?

2. Can I disable such kind of validation?

Thanks

Leon

[Age Mooij‏]

Hi Leon

Spray implements the Http spec strictly and the http spec defines three “acceptable” date formats, two of which are strongly deprecated and only supposed to be supported in the context of Http 1.0. Here’s the relevant section of the spec:

http://tools.ietf.org/html/rfc7231#section-7.1.1.1

Your example date is not a valid Http date and is therefor strictly illegal.

Is this something you can fix on the server you are calling?

You can turn off these warnings by setting the illegal-header-warnings property of spray.can.server.parsing and/or spray.can.client.parsing. The unparsed Last-Modified header will still be available to you as a so-called RawHeader.

See http://spray.io/documentation/1.2.2/spray-can/configuration/ for the full documentation.

Hope this helps

Age

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[Leon Ma‏]

Thanks so much for the detailed explanation !

Leon

在 2015年3月13日星期五 UTC-7上午3:54:50，Age Mooij写道：