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'''
Created on 20/01/2011
v0.1 (C) Gerald Storer
MIT License
Based on JSON.minify.js:
https://github.com/getify/JSON.minify
'''
import re
def json_minify(json,strip_space=True):
tokenizer=re.compile('"|(/\*)|(\*/)|(//)|\n|\r')
in_string = False
in_multiline_comment = False
in_singleline_comment = False
new_str = []
from_index = 0 # from is a keyword in Python
for match in re.finditer(tokenizer,json):
if not in_multiline_comment and not in_singleline_comment:
tmp2 = json[from_index:match.start()]
if not in_string and strip_space:
tmp2 = re.sub('[ \t\n\r]*','',tmp2) # replace only white space defined in standard
new_str.append(tmp2)
from_index = match.end()
if match.group() == '"' and not in_multiline_comment and not in_singleline_comment:
escaped = re.search('(\\\\)*$',json[:match.start()])
if not in_string or escaped is None or len(escaped.group()) % 2 == 0:
# start of string with ", or unescaped " character found to end string
in_string = not in_string
from_index -= 1 # include " character in next catch
elif match.group() == '/*' and not in_string and not in_multiline_comment and not in_singleline_comment:
in_multiline_comment = True
elif match.group() == '*/' and not in_string and in_multiline_comment and not in_singleline_comment:
in_multiline_comment = False
elif match.group() == '//' and not in_string and not in_multiline_comment and not in_singleline_comment:
in_singleline_comment = True
elif (match.group() == '\n' or match.group() == '\r') and not in_string and not in_multiline_comment and in_singleline_comment:
in_singleline_comment = False
elif not in_multiline_comment and not in_singleline_comment and (
match.group() not in ['\n','\r',' ','\t'] or not strip_space):
new_str.append(match.group())
new_str.append(json[from_index:])
return ''.join(new_str)
if __name__ == '__main__':
import json # requires Python 2.6+ to run tests
def test_json(s):
return json.loads(json_minify(s))
test1 = '''// this is a JSON file with comments
{
"foo": "bar", // this is cool
"bar": [
"baz", "bum", "zam"
],
/* the rest of this document is just fluff
in case you are interested. */
"something": 10,
"else": 20
}
/* NOTE: You can easily strip the whitespace and comments
from such a file with the JSON.minify() project hosted
here on github at http://github.com/getify/JSON.minify
*/
'''
test1_res = '''{"foo":"bar","bar":["baz","bum","zam"],"something":10,"else":20}'''
test2 = '''
{"/*":"*/","//":"",/*"//"*/"/*/"://
"//"}
'''
test2_res = '''{"/*":"*/","//":"","/*/":"//"}'''
test3 = r'''/*
this is a
multi line comment */{
"foo"
:
"bar/*"// something
, "b\"az":/*
something else */"blah"
}
'''
test3_res = r'''{"foo":"bar/*","b\"az":"blah"}'''
test4 = r'''{"foo": "ba\"r//", "bar\\": "b\\\"a/*z",
"baz\\\\": /* yay */ "fo\\\\\"*/o"
}
'''
test4_res = r'''{"foo":"ba\"r//","bar\\":"b\\\"a/*z","baz\\\\":"fo\\\\\"*/o"}'''
assert test_json(test1) == json.loads(test1_res),'Failed test 1'
assert test_json(test2) == json.loads(test2_res),'Failed test 2'
assert test_json(test3) == json.loads(test3_res),'Failed test 3'
assert test_json(test4) == json.loads(test4_res),'Failed test 4'
if __debug__: # Don't print passed message if the asserts didn't run
print 'Passed all tests'