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In the table above 1 is JSON::Ext::Parser, 2 is YAML.load with YAML compatbile JSON document, 3 is is JSON::Pure::Parser, and 4 is ActiveSupport::code. I have created some benchmark results (see the benchmarks/data-p4-3Ghz subdir of the package) for the JSON-parser to estimate the speed up in the C extension: Comparing times (call_time_mean):Ģ ParserBenchmarkYAML#parser 1000 repeats:ģ ParserBenchmarkPure#parser 1000 repeats:Ĥ ParserBenchmarkRails#parser 1000 repeats: The script tools/server.rb contains a small example if you want to test, how receiving a JSON object from a webrick server in your browser with the javasript prototype library works. There are also the methods Kernel#j for generate, and Kernel#jj for pretty_generate output to the console, that work analogous to Core Ruby's p and the pp library's pp methods. To create a valid JSON document you have to make sure, that the output is embedded in either a JSON array or a JSON object ] You can also use the pretty_generate method (which formats the output more verbosely and nicely) or fast_generate (which doesn't do any of the security checks generate performs, e. If you want to generate a JSON document from a ruby data structure call JSON. Now you can parse a JSON document into a ruby data structure by calling JSON. If you have installed the extension variant, you can pick either the extension variant or the pure variant by typing require ' json/ext '
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To load the installed variant (either the extension 'json' or the pure variant 'json_pure'). If you want to create the parser.c file from its parser.rl file or draw nice graphviz images of the state machines, you need ragel from: Usage If you want to build the extensions yourself you need rake: You can get it from rubyforge:
#Ruby docs stringscan install
There is also a pure ruby json only variant of the gem, that can be installed with: # gem install json_pure Instead, to install the newest JSON version. If you use Rubygems you can type # gem install json Will just install the pure ruby implementation of JSON. The above command will build the extensions and install them on your system. Just type into the command line as root: # rake install If you cannot build it on your system, you can settle for the latter. It's recommended to use the extension variant of JSON, because it's faster than the pure ruby variant. If a document string has ASCII-8BIT as an encoding the parser attempts to figure out which of the UTF encodings from above it is and trys to parse it. Under Ruby 1.9 they take advantage of Ruby's M17n features and can parse all documents which have the correct String#encoding set.
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The JSON parsers can parse UTF-8, UTF-16BE, UTF-16LE, UTF-32BE, and UTF-32LE JSON documents under Ruby 1.8. To encode raw binary strings, that aren't UTF-8 encoded, please use the to_json_raw_object method of String (which produces an object, that contains a byte array) and decode the result on the receiving endpoint.
#Ruby docs stringscan code
If an :ascii_only option with a true value is given, they escape all non-ASCII and control characters with uXXXX escape sequences, and support UTF-16 surrogate pairs in order to be able to generate the whole range of unicode code points.Īll strings, that are to be encoded as JSON strings, should be UTF-8 byte sequences on the Ruby side.
#Ruby docs stringscan generator
īoth variants of the JSON generator generate UTF-8 character sequences by default. The quite a bit faster native extension variant, which is in parts implemented in C or Java and comes with its own unicode conversion functions and a parser generated by the ragel state machine compiler. Starting from version 1.0.0 on there will be two variants available:Ī pure ruby variant, that relies on the iconv and the stringscan extensions, which are both part of the ruby standard library. This is a implementation of the JSON specification according to RFC 4627.