1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
#!/usr/bin/python
# Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Flattens a HTML file by inlining its external resources.
This is a small script that takes a HTML file, looks for src attributes
and inlines the specified file, producing one HTML file with no external
dependencies.
This does not inline CSS styles, nor does it inline anything referenced
from an inlined file.
"""
import os
import re
import sys
import base64
import mimetypes
DIST_DEFAULT = 'CHROMIUM'
DIST_ENV_VAR = 'CHROMIUM_BUILD'
DIST_SUBSTR = '%DISTRIBUTION%'
def ReadFile(input_filename):
"""Helper function that returns input_filename as a string.
Args:
input_filename: name of file to be read
Returns:
string
"""
f = open(input_filename, 'rb')
file_contents = f.read()
f.close()
return file_contents
def SrcInline(src_match, base_path, distribution):
"""regex replace function.
Takes a regex match for src="filename", attempts to read the file
at 'filename' and returns the src attribute with the file inlined
as a data URI. If it finds DIST_SUBSTR string in file name, replaces
it with distribution.
Args:
src_match: regex match object with 'filename' named capturing group
base_path: path that to look for files in
distribution: string that should replace DIST_SUBSTR
Returns:
string
"""
filename = src_match.group('filename')
if filename.find(':') != -1:
# filename is probably a URL, which we don't want to bother inlining
return src_match.group(0)
filename = filename.replace('%DISTRIBUTION%', distribution)
filepath = os.path.join(base_path, filename)
mimetype = mimetypes.guess_type(filename)[0] or 'text/plain'
inline_data = base64.standard_b64encode(ReadFile(filepath))
prefix = src_match.string[src_match.start():src_match.start('filename')-1]
return "%s\"data:%s;base64,%s\"" % (prefix, mimetype, inline_data)
def InlineFile(input_filename, output_filename):
"""Inlines the resources in a specified file.
Reads input_filename, finds all the src attributes and attempts to
inline the files they are referring to, then writes the result
to output_filename.
Args:
input_filename: name of file to read in
output_filename: name of file to be written to
"""
print "inlining %s to %s" % (input_filename, output_filename)
input_filepath = os.path.dirname(input_filename)
distribution = DIST_DEFAULT
if DIST_ENV_VAR in os.environ.keys():
distribution = os.environ[DIST_ENV_VAR]
if len(distribution) > 1 and distribution[0] == '_':
distribution = distribution[1:].lower()
def SrcReplace(src_match):
"""Helper function to provide SrcInline with the base file path"""
return SrcInline(src_match, input_filepath, distribution)
# TODO(glen): Make this regex not match src="" text that is not inside a tag
flat_text = re.sub('src="(?P<filename>[^"\']*)"',
SrcReplace,
ReadFile(input_filename))
# TODO(glen): Make this regex not match url('') that is not inside a style
flat_text = re.sub('background:[ ]*url\(\'(?P<filename>[^"\']*)\'',
SrcReplace,
flat_text)
out_file = open(output_filename, 'wb')
out_file.writelines(flat_text)
out_file.close()
def main():
if len(sys.argv) <= 2:
print "Flattens a HTML file by inlining its external resources.\n"
print "html_inline.py inputfile outputfile"
else:
InlineFile(sys.argv[1], sys.argv[2])
if __name__ == '__main__':
main()
|
