1 # !/usr/bin/env python 2 # Copyright 2014 The Chromium Authors. All rights reserved. 3 # Use of this source code is governed by a BSD-style license that can be 4 # found in the LICENSE file. 5 6 # Generates the hashed_ad_networks.[h,cc] files. Takes an input the name of a 7 # file with all ad network host patterns, new-line separated. If given an 8 # optional root output file name, generates the files <root_output_name>.h and 9 # <root_output_name>.cc. If no output name is given, the output name is 10 # 'hashed_ad_networks'. 11 # 12 # These are found at chrome/browser/extensions/activity_log/hashed_ad_networks.* 13 # and are used by the ActivityLog and HashedAdNetworkDatabase for recognizing 14 # ad injection. 15 16 from hashlib import sha256 17 from argparse import ArgumentParser 18 import sys 19 20 _LICENSE = '''\ 21 // Copyright 2014 The Chromium Authors. All rights reserved. 22 // Use of this source code is governed by a BSD-style license that can be 23 // found in the LICENSE file. 24 25 // This file is automatically generated from the script in 26 // chrome/browser/extensions/activity_log/generate_ad_network_hashes.py. 27 // DO NOT MODIFY BY HAND! 28 ''' 29 30 _H_TEMPLATE = '''\ 31 %(license)s 32 #ifndef CHROME_BROWSER_EXTENSIONS_ACTIVITY_LOG_HASHED_AD_NETWORKS_H_ 33 #define CHROME_BROWSER_EXTENSIONS_ACTIVITY_LOG_HASHED_AD_NETWORKS_H_ 34 35 #include "base/basictypes.h" 36 37 namespace extensions { 38 39 extern const char* kHashedAdNetworks[]; 40 extern const int kNumHashedAdNetworks; 41 42 } // namespace extensions 43 44 #endif // CHROME_BROWSER_EXTENSIONS_ACTIVITY_LOG_HASHED_AD_NETWORKS_H_ 45 ''' 46 47 _CC_TEMPLATE = '''\ 48 %(license)s 49 #include "chrome/browser/extensions/activity_log/hashed_ad_networks.h" 50 51 #include "base/basictypes.h" 52 53 namespace extensions { 54 55 const char* kHashedAdNetworks[] = { 56 %(ad_networks)s 57 }; 58 59 const int kNumHashedAdNetworks = arraysize(kHashedAdNetworks); 60 61 } // namespace extensions 62 ''' 63 64 65 def Generate(input_filename, output_root_filename): 66 '''Generate the .h and .cc files for the hashed_ad_network source files. 67 |input_filename| 68 The name of the input file, which should have one host to be hashed per 69 line. 70 |output_root_filename| 71 The root name of the output files. This will generate a .h and .cc file, 72 like |output_root_filename|.[h,cc]. 73 ''' 74 with open(input_filename, 'r') as file: 75 hashes = ['"%s"' % sha256(line.strip()).hexdigest()[:16].upper() 76 for line in file.readlines()] 77 78 # Hashes should be sorted in C++ so we can do a binary search over them. 79 hashes.sort() 80 ad_networks = ',\n '.join(hashes) 81 for ext, template in (('.h', _H_TEMPLATE), 82 ('.cc', _CC_TEMPLATE)): 83 with open(output_root_filename + ext, 'w') as out: 84 out.write(template % { 85 'license': _LICENSE, 86 'ad_networks': ad_networks 87 }) 88 89 90 if __name__ == '__main__': 91 parser = ArgumentParser( 92 description='Generate hashed_ad_networks.[h,cc] source files') 93 parser.add_argument( 94 'input_file', 95 help='The name of the input file with the hosts to be hashed') 96 parser.add_argument( 97 '-o', '--out', 98 help='The root name of the output source file', 99 default='hashed_ad_networks') 100 101 args = parser.parse_args() 102 Generate(args.input_file, args.out) 103
