[erlang-questions] Which Erlang JSON parser?

Ivan Uemlianin <>
Thu Jul 29 11:10:28 CEST 2010


Dear Alexander

Have you tried mochijson or mochijson2 from mochiweb?

     http://stackoverflow.com/questions/1562235/mochijson2-or-mochijson

Best wishes

Ivan


On 29/07/2010 10:01, 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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Ivan A. Uemlianin
Speech Technology Research and Development

                     
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