[erlang-questions] Which Erlang JSON parser?

Filipe David Manana <>
Mon Aug 2 15:44:38 CEST 2010

You also have this event oriented (optionally) parser:


The Erlang structures it returns after parsing are 100% equivalent to
those of Mochiweb's JSON parser.
It's fully written in Erlang.

On Thu, Jul 29, 2010 at 10:01 AM, Alexander Kotelnikov
<> wrote:
> Hello.
> It is a terrible story. I needed a JSON parcer to deal with JSON data in
> my Erlang programm.
> At first I picked json_eep
> (http://github.com/jchris/erlang-json-eep-parser.git) which worked quite
> fine, but later I found out that it is not able to parse (some!) escaped
> unicode characters:
> 28> json_eep:json_to_term("\"\\u0433\\u043e\\u0440\\u043e\\u0434\"").
> ** exception error: bad argument
>     in function  list_to_binary/1
>        called as list_to_binary([1075,1086,1088,1086,1076])
>     in call from json_grammar:yeccpars2_9/7
>     in call from json_grammar:yeccpars0/2
>     in call from json_eep:json_to_term/1
> My guess is that just a little change near list_to_binary should fix the
> problem.
> Then I start investigation of other parsers. I found around 7. Most of
> them not eep0018 parsers. So I tried
> http://github.com/davisp/eep0018.git
> and
> http://github.com/dizzyd/eep0018.git (both are based on yajl).
> The former did not build for me because of some rebar issues. The latter
> did after some changes to Makefiles. A little problem with it is that I
> do not understand, how it decodes unicode:
> 1> eep0018:json_to_term("\"\\u0433\\u043e\\u0440\\u043e\\u0434\"").
> <<208,179,208,190,209,128,208,190,208,180>>
> Probably authors of these modules read this list and will clarify and/or
> fix if there is something to fix.
> Thanks, A.
> PS And, just in case if anyone cares, none of these parsers implements
> json_to_term/2.
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Filipe David Manana,

"Reasonable men adapt themselves to the world.
 Unreasonable men adapt the world to themselves.
 That's why all progress depends on unreasonable men."

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