NAME

json - JSON parser

SYNOPSIS

package require Tcl 8.4

package require json ?1.1?

::json::json2dict txt

DESCRIPTION

The json package provides a simple Tcl-only library for parsing the JSON http://www.json.org/ data exchange format as specified in RFC 4627 http://www.ietf.org/rfc/rfc4627.txt. There is some ambiguity in parsing JSON because JSON has type information that is not maintained by the Tcl conversion. The json package returns data as a Tcl dict. Either the dict package or Tcl 8.5 is required for use.

COMMANDS

::json::json2dict txt: Parse JSON formatted text txt into a Tcl dict and return the value.

EXAMPLES

An example of a JSON array converted to Tcl. A JSON array is returned as a single item with multiple elements.

[


    {


       "precision": "zip",


       "Latitude":  37.7668,


       "Longitude": -122.3959,


       "Address":   "",


       "City":      "SAN FRANCISCO",


       "State":     "CA",


       "Zip":       "94107",


       "Country":   "US"


    },


    {


       "precision": "zip",


       "Latitude":  37.371991,


       "Longitude": -122.026020,


       "Address":   "",


       "City":      "SUNNYVALE",


       "State":     "CA",


       "Zip":       "94085",


       "Country":   "US"


    }
]
=>
{Country US Latitude 37.7668 precision zip State CA City {SAN FRANCISCO} Address {} Zip 94107 Longitude -122.3959} {Country US Latitude 37.371991 precision zip State CA City SUNNYVALE Address {} Zip 94085 Longitude -122.026020}

An example of a JSON object converted to Tcl. A JSON object is returned as a multi-element list (a dict).

{


    "Image": {


        "Width":  800,


        "Height": 600,


        "Title":  "View from 15th Floor",


        "Thumbnail": {


            "Url":    "http://www.example.com/image/481989943",


            "Height": 125,


            "Width":  "100"


        },


        "IDs": [116, 943, 234, 38793]


    }
}
=>
Image {IDs {116 943 234 38793} Thumbnail {Width 100 Height 125 Url http://www.example.com/image/481989943} Width 800 Height 600 Title {View from 15th Floor}}

BUGS, IDEAS, FEEDBACK

This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category json of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for either package and/or documentation.

KEYWORDS

data exchange, exchange format, javascript, json

COPYRIGHT

Copyright (c) 2006 ActiveState Software Inc., 2009 Thomas Maeder, Glue Software Engineering AG