Simon Falsig created THRIFT-2870:
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Summary: C++ TJSONProtocol using locale dependent formatting
Key: THRIFT-2870
URL: https://issues.apache.org/jira/browse/THRIFT-2870
Project: Thrift
Issue Type: Bug
Components: C++ - Library
Affects Versions: 0.9
Environment: Linux, Boost 1.51
Reporter: Simon Falsig
I'm using Thrift for serializing objects (in C++) into JSON strings, which I
then store as files. This usually works fine, but if the locale of my system is
set to a locale where the decimal separator is ',' instead of '.' (for instance
in Denmark), then the TJSONProtocol (specifically the writeJSONDouble function
that does the double to string conversion through a boost::lexical_cast) will
also use this separator when serializing doubles.
This kinda plays havoc with the JSON specification, which does not allow for
localized formatting, and depends on always using '.' as a decimal separator. I
could imagine that there may be other more subtle places where the local can
have an effect, but this is currently the only place I've been having trouble
with.
I can see that the same problem has been fixed for C# (commit
3da317bda100130b2f615034c46b0944888f0f14 / THRIFT-1245 C# JSON Protocol uses
culture-dependant decimal separator for double) but it doesn't seem as if
there's a similarly easy way to fix boost::lexical_cast...
Note that I'm using Thrift 0.9.0, but as far as I can see there hasn't been any
relevant changes to TJSONProtocol.cpp since.
Relevant thread on thrift-user mailing list can be found here:
http://mail-archives.apache.org/mod_mbox/thrift-user/201412.mbox/%3c7c2463f510dbb7548b4718e202ac1...@mail.gmail.com%3e
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