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bc1's avatar
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Nov 28, 2017

HTTP::Collect results in garbled HTTP::Payload when using non-english characters

Hi there,

I'm using an irule to collect a POSTed payload, manipulate the content and then POST on to the back-end pool, however when non-english characters are used then the collected payload is garbled even before I start any processing:

If I post for example:

â ê î ô û á é í ó ú ü ñ

I get the following in HTTP_REQUEST_DATA:

â ê î ô û á é í ó ú ü ñ

I've looked through devcentral but the examples don't seem to relate to this or else they relate to the URI .. Is there a best-practice on how to correct this?

Many thanks!

  HTTP::collect 1048576

  log local0. [HTTP::payload]

1 Reply

  • Hi bc,

    the programming language of iRules is TCL which uses always UTF-8 to represent a string. If your input contains highbit ASCII charcters (e.g. Win1252, Latin-1, ISO-8859-1) certain TCL commands will silently change the used encoding.

    To reformat UTF-8 back to its ASCII representation you could try a

    set output [binary format A* $input]
    . By doing so the UTF-8 encoded string representation of the
    will shimmer to a binary
    which is encoded in plain-ASCII.

    Cheers, Kai