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[utils] js_to_json
: Improve escape handling (#5217)
Authored by: Grub4K
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@ -1100,6 +1100,12 @@ def test_js_to_json_edgecases(self):
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on = js_to_json('[1,//{},\n2]')
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self.assertEqual(json.loads(on), [1, 2])
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on = js_to_json(R'"\^\$\#"')
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self.assertEqual(json.loads(on), R'^$#', msg='Unnecessary escapes should be stripped')
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on = js_to_json('\'"\\""\'')
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self.assertEqual(json.loads(on), '"""', msg='Unnecessary quote escape should be escaped')
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def test_js_to_json_malformed(self):
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self.assertEqual(js_to_json('42a1'), '42"a1"')
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self.assertEqual(js_to_json('42a-1'), '42"a"-1')
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@ -3275,6 +3275,8 @@ def strip_jsonp(code):
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def js_to_json(code, vars={}, *, strict=False):
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# vars is a dict of var, val pairs to substitute
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STRING_QUOTES = '\'"'
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STRING_RE = '|'.join(rf'{q}(?:\\.|[^\\{q}])*{q}' for q in STRING_QUOTES)
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COMMENT_RE = r'/\*(?:(?!\*/).)*?\*/|//[^\n]*\n'
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SKIP_RE = fr'\s*(?:{COMMENT_RE})?\s*'
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INTEGER_TABLE = (
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@ -3282,6 +3284,15 @@ def js_to_json(code, vars={}, *, strict=False):
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(fr'(?s)^(0+[0-7]+){SKIP_RE}:?$', 8),
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)
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def process_escape(match):
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JSON_PASSTHROUGH_ESCAPES = R'"\bfnrtu'
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escape = match.group(1) or match.group(2)
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return (Rf'\{escape}' if escape in JSON_PASSTHROUGH_ESCAPES
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else R'\u00' if escape == 'x'
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else '' if escape == '\n'
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else escape)
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def fix_kv(m):
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v = m.group(0)
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if v in ('true', 'false', 'null'):
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@ -3289,28 +3300,25 @@ def fix_kv(m):
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elif v in ('undefined', 'void 0'):
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return 'null'
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elif v.startswith('/*') or v.startswith('//') or v.startswith('!') or v == ',':
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return ""
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return ''
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if v[0] in ("'", '"'):
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v = re.sub(r'(?s)\\.|"', lambda m: {
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'"': '\\"',
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"\\'": "'",
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'\\\n': '',
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'\\x': '\\u00',
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}.get(m.group(0), m.group(0)), v[1:-1])
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else:
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for regex, base in INTEGER_TABLE:
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im = re.match(regex, v)
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if im:
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i = int(im.group(1), base)
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return '"%d":' % i if v.endswith(':') else '%d' % i
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if v[0] in STRING_QUOTES:
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escaped = re.sub(r'(?s)(")|\\(.)', process_escape, v[1:-1])
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return f'"{escaped}"'
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if v in vars:
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return json.dumps(vars[v])
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if strict:
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raise ValueError(f'Unknown value: {v}')
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for regex, base in INTEGER_TABLE:
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im = re.match(regex, v)
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if im:
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i = int(im.group(1), base)
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return f'"{i}":' if v.endswith(':') else str(i)
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return '"%s"' % v
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if v in vars:
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return json.dumps(vars[v])
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if not strict:
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return f'"{v}"'
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raise ValueError(f'Unknown value: {v}')
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def create_map(mobj):
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return json.dumps(dict(json.loads(js_to_json(mobj.group(1) or '[]', vars=vars))))
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@ -3320,15 +3328,14 @@ def create_map(mobj):
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code = re.sub(r'new Date\((".+")\)', r'\g<1>', code)
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code = re.sub(r'new \w+\((.*?)\)', lambda m: json.dumps(m.group(0)), code)
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return re.sub(r'''(?sx)
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"(?:[^"\\]*(?:\\\\|\\['"nurtbfx/\n]))*[^"\\]*"|
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'(?:[^'\\]*(?:\\\\|\\['"nurtbfx/\n]))*[^'\\]*'|
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{comment}|,(?={skip}[\]}}])|
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return re.sub(rf'''(?sx)
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{STRING_RE}|
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{COMMENT_RE}|,(?={SKIP_RE}[\]}}])|
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void\s0|(?:(?<![0-9])[eE]|[a-df-zA-DF-Z_$])[.a-zA-Z_$0-9]*|
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\b(?:0[xX][0-9a-fA-F]+|0+[0-7]+)(?:{skip}:)?|
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[0-9]+(?={skip}:)|
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\b(?:0[xX][0-9a-fA-F]+|0+[0-7]+)(?:{SKIP_RE}:)?|
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[0-9]+(?={SKIP_RE}:)|
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!+
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'''.format(comment=COMMENT_RE, skip=SKIP_RE), fix_kv, code)
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''', fix_kv, code)
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def qualities(quality_ids):
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