Friday, August 2, 2013

Simple ANSI C formatter for JSON streams

Recently I needed to debug a JSON document coming from a REST service. The problem I encountered was that it was not a single file, but a stream dripping from a fairly slow network connection. Besides the fact that I didn't want to wait for the whole document to finish downloading, I couldn't find a tool which could properly parse only partially available (and hence formally invalid) JSON document. So I wrote my own simple parser, which reads data line by line from the input stream and formats it without validation. You can use it to parse single files, or pipe through it data coming from a web service, like this:
wget -O - | jsonformat | less
It is written in portable ANSI C, so it should compile on any platform providing C89 compatible compiler. You can get it from the project page on Github.

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