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@@ -1,422 +1,400 b'' | |||
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1 | 1 | # httppeer.py - HTTP repository proxy classes for mercurial |
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2 | 2 | # |
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3 | 3 | # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com> |
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4 | 4 | # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com> |
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5 | 5 | # |
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6 | 6 | # This software may be used and distributed according to the terms of the |
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7 | 7 | # GNU General Public License version 2 or any later version. |
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8 | 8 | |
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9 | 9 | from __future__ import absolute_import |
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10 | 10 | |
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11 | 11 | import errno |
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12 | 12 | import os |
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13 | 13 | import socket |
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14 | 14 | import struct |
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15 | 15 | import tempfile |
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16 | 16 | |
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17 | 17 | from .i18n import _ |
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18 | 18 | from .node import nullid |
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19 | 19 | from . import ( |
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20 | 20 | bundle2, |
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21 | 21 | error, |
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22 | 22 | httpconnection, |
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23 | 23 | pycompat, |
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24 | 24 | statichttprepo, |
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25 | 25 | url, |
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26 | 26 | util, |
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27 | 27 | wireproto, |
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28 | 28 | ) |
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29 | 29 | |
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30 | 30 | httplib = util.httplib |
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31 | 31 | urlerr = util.urlerr |
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32 | 32 | urlreq = util.urlreq |
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33 | 33 | |
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34 | # FUTURE: consider refactoring this API to use generators. This will | |
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35 | # require a compression engine API to emit generators. | |
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36 | def decompressresponse(response, engine): | |
|
37 | try: | |
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38 | reader = engine.decompressorreader(response) | |
|
39 | except httplib.HTTPException: | |
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40 | raise IOError(None, _('connection ended unexpectedly')) | |
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41 | ||
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42 | # We need to wrap reader.read() so HTTPException on subsequent | |
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43 | # reads is also converted. | |
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44 | # Ideally we'd use super() here. However, if ``reader`` isn't a new-style | |
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45 | # class, this can raise: | |
|
46 | # TypeError: super() argument 1 must be type, not classobj | |
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47 | origread = reader.read | |
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48 | class readerproxy(reader.__class__): | |
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49 | def read(self, *args, **kwargs): | |
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50 | try: | |
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51 | return origread(*args, **kwargs) | |
|
52 | except httplib.HTTPException: | |
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53 | raise IOError(None, _('connection ended unexpectedly')) | |
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54 | ||
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55 | reader.__class__ = readerproxy | |
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56 | return reader | |
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57 | ||
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58 | 34 | def encodevalueinheaders(value, header, limit): |
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59 | 35 | """Encode a string value into multiple HTTP headers. |
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60 | 36 | |
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61 | 37 | ``value`` will be encoded into 1 or more HTTP headers with the names |
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62 | 38 | ``header-<N>`` where ``<N>`` is an integer starting at 1. Each header |
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63 | 39 | name + value will be at most ``limit`` bytes long. |
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64 | 40 | |
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65 | 41 | Returns an iterable of 2-tuples consisting of header names and values. |
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66 | 42 | """ |
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67 | 43 | fmt = header + '-%s' |
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68 | 44 | valuelen = limit - len(fmt % '000') - len(': \r\n') |
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69 | 45 | result = [] |
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70 | 46 | |
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71 | 47 | n = 0 |
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72 | 48 | for i in xrange(0, len(value), valuelen): |
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73 | 49 | n += 1 |
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74 | 50 | result.append((fmt % str(n), value[i:i + valuelen])) |
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75 | 51 | |
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76 | 52 | return result |
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77 | 53 | |
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78 | 54 | def _wraphttpresponse(resp): |
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79 | 55 | """Wrap an HTTPResponse with common error handlers. |
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80 | 56 | |
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81 | 57 | This ensures that any I/O from any consumer raises the appropriate |
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82 | 58 | error and messaging. |
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83 | 59 | """ |
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84 | 60 | origread = resp.read |
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85 | 61 | |
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86 | 62 | class readerproxy(resp.__class__): |
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87 | 63 | def read(self, size=None): |
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88 | 64 | try: |
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89 | 65 | return origread(size) |
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90 | 66 | except httplib.IncompleteRead as e: |
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91 | 67 | # e.expected is an integer if length known or None otherwise. |
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92 | 68 | if e.expected: |
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93 | 69 | msg = _('HTTP request error (incomplete response; ' |
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94 | 70 | 'expected %d bytes got %d)') % (e.expected, |
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95 | 71 | len(e.partial)) |
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96 | 72 | else: |
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97 | 73 | msg = _('HTTP request error (incomplete response)') |
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98 | 74 | |
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99 | 75 | raise error.RichIOError( |
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100 | 76 | msg, |
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101 | 77 | hint=_('this may be an intermittent network failure; ' |
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102 | 78 | 'if the error persists, consider contacting the ' |
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103 | 79 | 'network or server operator')) |
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104 | 80 | except httplib.HTTPException as e: |
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105 | 81 | raise error.RichIOError( |
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106 | 82 | _('HTTP request error (%s)') % e, |
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107 | 83 | hint=_('this may be an intermittent failure; ' |
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108 | 84 | 'if the error persists, consider contacting the ' |
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109 | 85 | 'network or server operator')) |
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110 | 86 | |
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111 | 87 | resp.__class__ = readerproxy |
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112 | 88 | |
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113 | 89 | class httppeer(wireproto.wirepeer): |
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114 | 90 | def __init__(self, ui, path): |
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115 | 91 | self.path = path |
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116 | 92 | self.caps = None |
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117 | 93 | self.handler = None |
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118 | 94 | self.urlopener = None |
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119 | 95 | self.requestbuilder = None |
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120 | 96 | u = util.url(path) |
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121 | 97 | if u.query or u.fragment: |
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122 | 98 | raise error.Abort(_('unsupported URL component: "%s"') % |
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123 | 99 | (u.query or u.fragment)) |
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124 | 100 | |
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125 | 101 | # urllib cannot handle URLs with embedded user or passwd |
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126 | 102 | self._url, authinfo = u.authinfo() |
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127 | 103 | |
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128 | 104 | self.ui = ui |
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129 | 105 | self.ui.debug('using %s\n' % self._url) |
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130 | 106 | |
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131 | 107 | self.urlopener = url.opener(ui, authinfo) |
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132 | 108 | self.requestbuilder = urlreq.request |
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133 | 109 | |
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134 | 110 | def __del__(self): |
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135 | 111 | urlopener = getattr(self, 'urlopener', None) |
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136 | 112 | if urlopener: |
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137 | 113 | for h in urlopener.handlers: |
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138 | 114 | h.close() |
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139 | 115 | getattr(h, "close_all", lambda : None)() |
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140 | 116 | |
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141 | 117 | def url(self): |
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142 | 118 | return self.path |
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143 | 119 | |
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144 | 120 | # look up capabilities only when needed |
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145 | 121 | |
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146 | 122 | def _fetchcaps(self): |
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147 | 123 | self.caps = set(self._call('capabilities').split()) |
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148 | 124 | |
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149 | 125 | def _capabilities(self): |
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150 | 126 | if self.caps is None: |
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151 | 127 | try: |
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152 | 128 | self._fetchcaps() |
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153 | 129 | except error.RepoError: |
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154 | 130 | self.caps = set() |
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155 | 131 | self.ui.debug('capabilities: %s\n' % |
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156 | 132 | (' '.join(self.caps or ['none']))) |
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157 | 133 | return self.caps |
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158 | 134 | |
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159 | 135 | def lock(self): |
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160 | 136 | raise error.Abort(_('operation not supported over http')) |
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161 | 137 | |
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162 | 138 | def _callstream(self, cmd, _compressible=False, **args): |
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163 | 139 | if cmd == 'pushkey': |
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164 | 140 | args['data'] = '' |
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165 | 141 | data = args.pop('data', None) |
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166 | 142 | headers = args.pop('headers', {}) |
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167 | 143 | |
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168 | 144 | self.ui.debug("sending %s command\n" % cmd) |
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169 | 145 | q = [('cmd', cmd)] |
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170 | 146 | headersize = 0 |
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171 | 147 | varyheaders = [] |
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172 | 148 | # Important: don't use self.capable() here or else you end up |
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173 | 149 | # with infinite recursion when trying to look up capabilities |
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174 | 150 | # for the first time. |
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175 | 151 | postargsok = self.caps is not None and 'httppostargs' in self.caps |
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176 | 152 | # TODO: support for httppostargs when data is a file-like |
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177 | 153 | # object rather than a basestring |
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178 | 154 | canmungedata = not data or isinstance(data, basestring) |
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179 | 155 | if postargsok and canmungedata: |
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180 | 156 | strargs = urlreq.urlencode(sorted(args.items())) |
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181 | 157 | if strargs: |
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182 | 158 | if not data: |
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183 | 159 | data = strargs |
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184 | 160 | elif isinstance(data, basestring): |
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185 | 161 | data = strargs + data |
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186 | 162 | headers['X-HgArgs-Post'] = len(strargs) |
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187 | 163 | else: |
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188 | 164 | if len(args) > 0: |
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189 | 165 | httpheader = self.capable('httpheader') |
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190 | 166 | if httpheader: |
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191 | 167 | headersize = int(httpheader.split(',', 1)[0]) |
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192 | 168 | if headersize > 0: |
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193 | 169 | # The headers can typically carry more data than the URL. |
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194 | 170 | encargs = urlreq.urlencode(sorted(args.items())) |
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195 | 171 | for header, value in encodevalueinheaders(encargs, 'X-HgArg', |
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196 | 172 | headersize): |
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197 | 173 | headers[header] = value |
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198 | 174 | varyheaders.append(header) |
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199 | 175 | else: |
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200 | 176 | q += sorted(args.items()) |
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201 | 177 | qs = '?%s' % urlreq.urlencode(q) |
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202 | 178 | cu = "%s%s" % (self._url, qs) |
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203 | 179 | size = 0 |
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204 | 180 | if util.safehasattr(data, 'length'): |
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205 | 181 | size = data.length |
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206 | 182 | elif data is not None: |
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207 | 183 | size = len(data) |
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208 | 184 | if size and self.ui.configbool('ui', 'usehttp2', False): |
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209 | 185 | headers['Expect'] = '100-Continue' |
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210 | 186 | headers['X-HgHttp2'] = '1' |
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211 | 187 | if data is not None and 'Content-Type' not in headers: |
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212 | 188 | headers['Content-Type'] = 'application/mercurial-0.1' |
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213 | 189 | |
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214 | 190 | # Tell the server we accept application/mercurial-0.2 and multiple |
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215 | 191 | # compression formats if the server is capable of emitting those |
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216 | 192 | # payloads. |
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217 | 193 | protoparams = [] |
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218 | 194 | |
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219 | 195 | mediatypes = set() |
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220 | 196 | if self.caps is not None: |
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221 | 197 | mt = self.capable('httpmediatype') |
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222 | 198 | if mt: |
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223 | 199 | protoparams.append('0.1') |
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224 | 200 | mediatypes = set(mt.split(',')) |
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225 | 201 | |
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226 | 202 | if '0.2tx' in mediatypes: |
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227 | 203 | protoparams.append('0.2') |
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228 | 204 | |
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229 | 205 | if '0.2tx' in mediatypes and self.capable('compression'): |
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230 | 206 | # We /could/ compare supported compression formats and prune |
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231 | 207 | # non-mutually supported or error if nothing is mutually supported. |
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232 | 208 | # For now, send the full list to the server and have it error. |
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233 | 209 | comps = [e.wireprotosupport().name for e in |
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234 | 210 | util.compengines.supportedwireengines(util.CLIENTROLE)] |
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235 | 211 | protoparams.append('comp=%s' % ','.join(comps)) |
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236 | 212 | |
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237 | 213 | if protoparams: |
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238 | 214 | protoheaders = encodevalueinheaders(' '.join(protoparams), |
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239 | 215 | 'X-HgProto', |
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240 | 216 | headersize or 1024) |
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241 | 217 | for header, value in protoheaders: |
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242 | 218 | headers[header] = value |
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243 | 219 | varyheaders.append(header) |
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244 | 220 | |
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245 | 221 | headers['Vary'] = ','.join(varyheaders) |
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246 | 222 | req = self.requestbuilder(cu, data, headers) |
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247 | 223 | |
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248 | 224 | if data is not None: |
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249 | 225 | self.ui.debug("sending %s bytes\n" % size) |
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250 | 226 | req.add_unredirected_header('Content-Length', '%d' % size) |
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251 | 227 | try: |
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252 | 228 | resp = self.urlopener.open(req) |
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253 | 229 | except urlerr.httperror as inst: |
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254 | 230 | if inst.code == 401: |
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255 | 231 | raise error.Abort(_('authorization failed')) |
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256 | 232 | raise |
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257 | 233 | except httplib.HTTPException as inst: |
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258 | 234 | self.ui.debug('http error while sending %s command\n' % cmd) |
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259 | 235 | self.ui.traceback() |
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260 | 236 | raise IOError(None, inst) |
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261 | 237 | |
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262 | 238 | # Insert error handlers for common I/O failures. |
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263 | 239 | _wraphttpresponse(resp) |
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264 | 240 | |
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265 | 241 | # record the url we got redirected to |
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266 | 242 | resp_url = resp.geturl() |
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267 | 243 | if resp_url.endswith(qs): |
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268 | 244 | resp_url = resp_url[:-len(qs)] |
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269 | 245 | if self._url.rstrip('/') != resp_url.rstrip('/'): |
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270 | 246 | if not self.ui.quiet: |
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271 | 247 | self.ui.warn(_('real URL is %s\n') % resp_url) |
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272 | 248 | self._url = resp_url |
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273 | 249 | try: |
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274 | 250 | proto = resp.getheader('content-type') |
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275 | 251 | except AttributeError: |
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276 | 252 | proto = resp.headers.get('content-type', '') |
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277 | 253 | |
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278 | 254 | safeurl = util.hidepassword(self._url) |
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279 | 255 | if proto.startswith('application/hg-error'): |
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280 | 256 | raise error.OutOfBandError(resp.read()) |
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281 | 257 | # accept old "text/plain" and "application/hg-changegroup" for now |
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282 | 258 | if not (proto.startswith('application/mercurial-') or |
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283 | 259 | (proto.startswith('text/plain') |
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284 | 260 | and not resp.headers.get('content-length')) or |
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285 | 261 | proto.startswith('application/hg-changegroup')): |
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286 | 262 | self.ui.debug("requested URL: '%s'\n" % util.hidepassword(cu)) |
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287 | 263 | raise error.RepoError( |
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288 | 264 | _("'%s' does not appear to be an hg repository:\n" |
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289 | 265 | "---%%<--- (%s)\n%s\n---%%<---\n") |
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290 | 266 | % (safeurl, proto or 'no content-type', resp.read(1024))) |
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291 | 267 | |
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292 | 268 | if proto.startswith('application/mercurial-'): |
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293 | 269 | try: |
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294 | 270 | version = proto.split('-', 1)[1] |
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295 | 271 | version_info = tuple([int(n) for n in version.split('.')]) |
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296 | 272 | except ValueError: |
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297 | 273 | raise error.RepoError(_("'%s' sent a broken Content-Type " |
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298 | 274 | "header (%s)") % (safeurl, proto)) |
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299 | 275 | |
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276 | # TODO consider switching to a decompression reader that uses | |
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277 | # generators. | |
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300 | 278 | if version_info == (0, 1): |
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301 | 279 | if _compressible: |
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302 |
return |
|
|
280 | return util.compengines['zlib'].decompressorreader(resp) | |
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303 | 281 | return resp |
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304 | 282 | elif version_info == (0, 2): |
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305 | 283 | # application/mercurial-0.2 always identifies the compression |
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306 | 284 | # engine in the payload header. |
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307 | 285 | elen = struct.unpack('B', resp.read(1))[0] |
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308 | 286 | ename = resp.read(elen) |
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309 | 287 | engine = util.compengines.forwiretype(ename) |
|
310 |
return decompress |
|
|
288 | return engine.decompressorreader(resp) | |
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311 | 289 | else: |
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312 | 290 | raise error.RepoError(_("'%s' uses newer protocol %s") % |
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313 | 291 | (safeurl, version)) |
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314 | 292 | |
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315 | 293 | if _compressible: |
|
316 |
return |
|
|
294 | return util.compengines['zlib'].decompressorreader(resp) | |
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317 | 295 | |
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318 | 296 | return resp |
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319 | 297 | |
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320 | 298 | def _call(self, cmd, **args): |
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321 | 299 | fp = self._callstream(cmd, **args) |
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322 | 300 | try: |
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323 | 301 | return fp.read() |
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324 | 302 | finally: |
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325 | 303 | # if using keepalive, allow connection to be reused |
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326 | 304 | fp.close() |
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327 | 305 | |
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328 | 306 | def _callpush(self, cmd, cg, **args): |
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329 | 307 | # have to stream bundle to a temp file because we do not have |
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330 | 308 | # http 1.1 chunked transfer. |
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331 | 309 | |
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332 | 310 | types = self.capable('unbundle') |
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333 | 311 | try: |
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334 | 312 | types = types.split(',') |
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335 | 313 | except AttributeError: |
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336 | 314 | # servers older than d1b16a746db6 will send 'unbundle' as a |
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337 | 315 | # boolean capability. They only support headerless/uncompressed |
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338 | 316 | # bundles. |
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339 | 317 | types = [""] |
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340 | 318 | for x in types: |
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341 | 319 | if x in bundle2.bundletypes: |
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342 | 320 | type = x |
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343 | 321 | break |
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344 | 322 | |
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345 | 323 | tempname = bundle2.writebundle(self.ui, cg, None, type) |
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346 | 324 | fp = httpconnection.httpsendfile(self.ui, tempname, "rb") |
|
347 | 325 | headers = {'Content-Type': 'application/mercurial-0.1'} |
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348 | 326 | |
|
349 | 327 | try: |
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350 | 328 | r = self._call(cmd, data=fp, headers=headers, **args) |
|
351 | 329 | vals = r.split('\n', 1) |
|
352 | 330 | if len(vals) < 2: |
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353 | 331 | raise error.ResponseError(_("unexpected response:"), r) |
|
354 | 332 | return vals |
|
355 | 333 | except socket.error as err: |
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356 | 334 | if err.args[0] in (errno.ECONNRESET, errno.EPIPE): |
|
357 | 335 | raise error.Abort(_('push failed: %s') % err.args[1]) |
|
358 | 336 | raise error.Abort(err.args[1]) |
|
359 | 337 | finally: |
|
360 | 338 | fp.close() |
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361 | 339 | os.unlink(tempname) |
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362 | 340 | |
|
363 | 341 | def _calltwowaystream(self, cmd, fp, **args): |
|
364 | 342 | fh = None |
|
365 | 343 | fp_ = None |
|
366 | 344 | filename = None |
|
367 | 345 | try: |
|
368 | 346 | # dump bundle to disk |
|
369 | 347 | fd, filename = tempfile.mkstemp(prefix="hg-bundle-", suffix=".hg") |
|
370 | 348 | fh = os.fdopen(fd, pycompat.sysstr("wb")) |
|
371 | 349 | d = fp.read(4096) |
|
372 | 350 | while d: |
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373 | 351 | fh.write(d) |
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374 | 352 | d = fp.read(4096) |
|
375 | 353 | fh.close() |
|
376 | 354 | # start http push |
|
377 | 355 | fp_ = httpconnection.httpsendfile(self.ui, filename, "rb") |
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378 | 356 | headers = {'Content-Type': 'application/mercurial-0.1'} |
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379 | 357 | return self._callstream(cmd, data=fp_, headers=headers, **args) |
|
380 | 358 | finally: |
|
381 | 359 | if fp_ is not None: |
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382 | 360 | fp_.close() |
|
383 | 361 | if fh is not None: |
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384 | 362 | fh.close() |
|
385 | 363 | os.unlink(filename) |
|
386 | 364 | |
|
387 | 365 | def _callcompressable(self, cmd, **args): |
|
388 | 366 | return self._callstream(cmd, _compressible=True, **args) |
|
389 | 367 | |
|
390 | 368 | def _abort(self, exception): |
|
391 | 369 | raise exception |
|
392 | 370 | |
|
393 | 371 | class httpspeer(httppeer): |
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394 | 372 | def __init__(self, ui, path): |
|
395 | 373 | if not url.has_https: |
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396 | 374 | raise error.Abort(_('Python support for SSL and HTTPS ' |
|
397 | 375 | 'is not installed')) |
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398 | 376 | httppeer.__init__(self, ui, path) |
|
399 | 377 | |
|
400 | 378 | def instance(ui, path, create): |
|
401 | 379 | if create: |
|
402 | 380 | raise error.Abort(_('cannot create new http repository')) |
|
403 | 381 | try: |
|
404 | 382 | if path.startswith('https:'): |
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405 | 383 | inst = httpspeer(ui, path) |
|
406 | 384 | else: |
|
407 | 385 | inst = httppeer(ui, path) |
|
408 | 386 | try: |
|
409 | 387 | # Try to do useful work when checking compatibility. |
|
410 | 388 | # Usually saves a roundtrip since we want the caps anyway. |
|
411 | 389 | inst._fetchcaps() |
|
412 | 390 | except error.RepoError: |
|
413 | 391 | # No luck, try older compatibility check. |
|
414 | 392 | inst.between([(nullid, nullid)]) |
|
415 | 393 | return inst |
|
416 | 394 | except error.RepoError as httpexception: |
|
417 | 395 | try: |
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418 | 396 | r = statichttprepo.instance(ui, "static-" + path, create) |
|
419 | 397 | ui.note(_('(falling back to static-http)\n')) |
|
420 | 398 | return r |
|
421 | 399 | except error.RepoError: |
|
422 | 400 | raise httpexception # use the original http RepoError instead |
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