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annotate rhodecode/lib/middleware/pygrack.py @ 2382:034e4fe1ebb2 beta

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changed dulwich git interface to gitweb + subprocessio
author Marcin Kuzminski <marcin@python-works.com>
date Mon, 04 Jun 2012 02:56:09 +0200
parents
children 378b0247e938
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2382
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1 import os
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2 import socket
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3 import logging
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4 import subprocess
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5
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6 from webob import Request, Response, exc
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7
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8 from rhodecode.lib import subprocessio
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9
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10 log = logging.getLogger(__name__)
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11
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12
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13 class FileWrapper(object):
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14
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15 def __init__(self, fd, content_length):
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16 self.fd = fd
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17 self.content_length = content_length
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18 self.remain = content_length
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19
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20 def read(self, size):
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21 if size <= self.remain:
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22 try:
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23 data = self.fd.read(size)
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24 except socket.error:
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25 raise IOError(self)
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26 self.remain -= size
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27 elif self.remain:
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28 data = self.fd.read(self.remain)
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29 self.remain = 0
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30 else:
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31 data = None
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32 return data
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33
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34 def __repr__(self):
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35 return '<FileWrapper %s len: %s, read: %s>' % (
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36 self.fd, self.content_length, self.content_length - self.remain
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37 )
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38
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39
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40 class GitRepository(object):
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41 git_folder_signature = set(['config', 'head', 'info', 'objects', 'refs'])
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42 commands = ['git-upload-pack', 'git-receive-pack']
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43
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44 def __init__(self, repo_name, content_path):
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45 files = set([f.lower() for f in os.listdir(content_path)])
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46 if not (self.git_folder_signature.intersection(files)
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47 == self.git_folder_signature):
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48 raise OSError('%s missing git signature' % content_path)
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49 self.content_path = content_path
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50 self.valid_accepts = ['application/x-%s-result' %
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51 c for c in self.commands]
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52 self.repo_name = repo_name
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53
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54 def _get_fixedpath(self, path):
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55 """
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56 Small fix for repo_path
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57
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58 :param path:
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59 :type path:
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60 """
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61 return path.split(self.repo_name, 1)[-1].strip('/')
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62
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63 def inforefs(self, request, environ):
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64 """
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65 WSGI Response producer for HTTP GET Git Smart
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66 HTTP /info/refs request.
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67 """
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68
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69 git_command = request.GET['service']
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70 if git_command not in self.commands:
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71 log.debug('command %s not allowed' % git_command)
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72 return exc.HTTPMethodNotAllowed()
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73
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74 # note to self:
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75 # please, resist the urge to add '\n' to git capture and increment
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76 # line count by 1.
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77 # The code in Git client not only does NOT need '\n', but actually
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78 # blows up if you sprinkle "flush" (0000) as "0001\n".
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79 # It reads binary, per number of bytes specified.
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80 # if you do add '\n' as part of data, count it.
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81 smart_server_advert = '# service=%s' % git_command
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82 try:
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83 out = subprocessio.SubprocessIOChunker(
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84 r'git %s --stateless-rpc --advertise-refs "%s"' % (
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85 git_command[4:], self.content_path),
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86 starting_values=[
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87 str(hex(len(smart_server_advert) + 4)[2:]
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88 .rjust(4, '0') + smart_server_advert + '0000')
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89 ]
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90 )
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91 except EnvironmentError, e:
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92 log.exception(e)
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93 raise exc.HTTPExpectationFailed()
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94 resp = Response()
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95 resp.content_type = 'application/x-%s-advertisement' % str(git_command)
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96 resp.app_iter = out
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97 return resp
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98
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99 def backend(self, request, environ):
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100 """
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101 WSGI Response producer for HTTP POST Git Smart HTTP requests.
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102 Reads commands and data from HTTP POST's body.
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103 returns an iterator obj with contents of git command's
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104 response to stdout
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105 """
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106 git_command = self._get_fixedpath(request.path_info)
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107 if git_command not in self.commands:
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108 log.debug('command %s not allowed' % git_command)
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109 return exc.HTTPMethodNotAllowed()
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110
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111 if 'CONTENT_LENGTH' in environ:
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112 inputstream = FileWrapper(environ['wsgi.input'],
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113 request.content_length)
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114 else:
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115 inputstream = environ['wsgi.input']
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116
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117 try:
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118 out = subprocessio.SubprocessIOChunker(
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119 r'git %s --stateless-rpc "%s"' % (git_command[4:],
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120 self.content_path),
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121 inputstream=inputstream
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122 )
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123 except EnvironmentError, e:
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124 log.exception(e)
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125 raise exc.HTTPExpectationFailed()
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126
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127 if git_command in [u'git-receive-pack']:
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128 # updating refs manually after each push.
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129 # Needed for pre-1.7.0.4 git clients using regular HTTP mode.
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130 subprocess.call(u'git --git-dir "%s" '
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131 'update-server-info' % self.content_path,
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132 shell=True)
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133
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134 resp = Response()
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135 resp.content_type = 'application/x-%s-result' % git_command.encode('utf8')
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136 resp.app_iter = out
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137 return resp
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138
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139 def __call__(self, environ, start_response):
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140 request = Request(environ)
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141 _path = self._get_fixedpath(request.path_info)
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142 if _path.startswith('info/refs'):
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143 app = self.inforefs
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144 elif [a for a in self.valid_accepts if a in request.accept]:
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145 app = self.backend
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146 try:
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147 resp = app(request, environ)
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148 except exc.HTTPException, e:
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149 resp = e
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150 log.exception(e)
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151 except Exception, e:
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152 log.exception(e)
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153 resp = exc.HTTPInternalServerError()
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154 return resp(environ, start_response)
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155
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156
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157 class GitDirectory(object):
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158
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159 def __init__(self, repo_root, repo_name):
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160 repo_location = os.path.join(repo_root, repo_name)
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161 if not os.path.isdir(repo_location):
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162 raise OSError(repo_location)
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163
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164 self.content_path = repo_location
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165 self.repo_name = repo_name
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166 self.repo_location = repo_location
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167
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168 def __call__(self, environ, start_response):
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169 content_path = self.content_path
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170 try:
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171 app = GitRepository(self.repo_name, content_path)
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172 except (AssertionError, OSError):
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173 if os.path.isdir(os.path.join(content_path, '.git')):
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174 app = GitRepository(os.path.join(content_path, '.git'))
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175 else:
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176 return exc.HTTPNotFound()(environ, start_response)
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177 return app(environ, start_response)
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178
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179
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180 def make_wsgi_app(repo_name, repo_root):
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181 return GitDirectory(repo_root, repo_name)