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1 # sshserver.py - ssh protocol server support for mercurial
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2 #
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3 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
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4 # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
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5 #
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6 # This software may be used and distributed according to the terms of the
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7 # GNU General Public License version 2, incorporated herein by reference.
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8
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9 from i18n import _
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10 from node import bin, hex
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11 import streamclone, util, hook
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12 import os, sys, tempfile, urllib
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13
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14 class sshserver(object):
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15 def __init__(self, ui, repo):
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16 self.ui = ui
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17 self.repo = repo
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18 self.lock = None
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19 self.fin = sys.stdin
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20 self.fout = sys.stdout
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21
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22 hook.redirect(True)
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23 sys.stdout = sys.stderr
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24
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25 # Prevent insertion/deletion of CRs
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26 util.set_binary(self.fin)
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27 util.set_binary(self.fout)
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28
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29 def getarg(self):
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30 argline = self.fin.readline()[:-1]
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31 arg, l = argline.split()
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32 val = self.fin.read(int(l))
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33 return arg, val
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34
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35 def respond(self, v):
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36 self.fout.write("%d\n" % len(v))
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37 self.fout.write(v)
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38 self.fout.flush()
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39
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40 def serve_forever(self):
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41 try:
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42 while self.serve_one(): pass
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43 finally:
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44 if self.lock is not None:
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45 self.lock.release()
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46 sys.exit(0)
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47
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48 def serve_one(self):
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49 cmd = self.fin.readline()[:-1]
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50 if cmd:
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51 impl = getattr(self, 'do_' + cmd, None)
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52 if impl: impl()
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53 else: self.respond("")
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54 return cmd != ''
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55
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56 def do_lookup(self):
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57 arg, key = self.getarg()
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58 assert arg == 'key'
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59 try:
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60 r = hex(self.repo.lookup(key))
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61 success = 1
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62 except Exception,inst:
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63 r = str(inst)
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64 success = 0
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65 self.respond("%s %s\n" % (success, r))
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66
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67 def do_branchmap(self):
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68 branchmap = self.repo.branchmap()
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69 heads = []
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70 for branch, nodes in branchmap.iteritems():
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71 branchname = urllib.quote(branch)
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72 branchnodes = [hex(node) for node in nodes]
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73 heads.append('%s %s' % (branchname, ' '.join(branchnodes)))
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74 self.respond('\n'.join(heads))
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75
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76 def do_heads(self):
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77 h = self.repo.heads()
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78 self.respond(" ".join(map(hex, h)) + "\n")
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79
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80 def do_hello(self):
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81 '''the hello command returns a set of lines describing various
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82 interesting things about the server, in an RFC822-like format.
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83 Currently the only one defined is "capabilities", which
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84 consists of a line in the form:
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85
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86 capabilities: space separated list of tokens
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87 '''
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88
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89 caps = ['unbundle', 'lookup', 'changegroupsubset', 'branchmap']
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90 if self.ui.configbool('server', 'uncompressed'):
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91 caps.append('stream=%d' % self.repo.changelog.version)
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92 self.respond("capabilities: %s\n" % (' '.join(caps),))
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93
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94 def do_lock(self):
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95 '''DEPRECATED - allowing remote client to lock repo is not safe'''
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96
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97 self.lock = self.repo.lock()
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98 self.respond("")
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99
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100 def do_unlock(self):
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101 '''DEPRECATED'''
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102
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103 if self.lock:
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104 self.lock.release()
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105 self.lock = None
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106 self.respond("")
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107
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108 def do_branches(self):
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109 arg, nodes = self.getarg()
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110 nodes = map(bin, nodes.split(" "))
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111 r = []
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112 for b in self.repo.branches(nodes):
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113 r.append(" ".join(map(hex, b)) + "\n")
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114 self.respond("".join(r))
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115
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116 def do_between(self):
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117 arg, pairs = self.getarg()
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118 pairs = [map(bin, p.split("-")) for p in pairs.split(" ")]
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119 r = []
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120 for b in self.repo.between(pairs):
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121 r.append(" ".join(map(hex, b)) + "\n")
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122 self.respond("".join(r))
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123
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124 def do_changegroup(self):
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125 nodes = []
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126 arg, roots = self.getarg()
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127 nodes = map(bin, roots.split(" "))
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128
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129 cg = self.repo.changegroup(nodes, 'serve')
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130 while True:
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131 d = cg.read(4096)
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132 if not d:
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133 break
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134 self.fout.write(d)
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135
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136 self.fout.flush()
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137
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138 def do_changegroupsubset(self):
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139 argmap = dict([self.getarg(), self.getarg()])
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140 bases = [bin(n) for n in argmap['bases'].split(' ')]
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141 heads = [bin(n) for n in argmap['heads'].split(' ')]
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142
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143 cg = self.repo.changegroupsubset(bases, heads, 'serve')
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144 while True:
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145 d = cg.read(4096)
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146 if not d:
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147 break
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148 self.fout.write(d)
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149
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150 self.fout.flush()
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151
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152 def do_addchangegroup(self):
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153 '''DEPRECATED'''
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154
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155 if not self.lock:
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156 self.respond("not locked")
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157 return
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158
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159 self.respond("")
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160 r = self.repo.addchangegroup(self.fin, 'serve', self.client_url())
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161 self.respond(str(r))
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162
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163 def client_url(self):
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164 client = os.environ.get('SSH_CLIENT', '').split(' ', 1)[0]
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165 return 'remote:ssh:' + client
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166
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167 def do_unbundle(self):
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168 their_heads = self.getarg()[1].split()
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169
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170 def check_heads():
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171 heads = map(hex, self.repo.heads())
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172 return their_heads == [hex('force')] or their_heads == heads
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173
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174 # fail early if possible
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175 if not check_heads():
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176 self.respond(_('unsynced changes'))
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177 return
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178
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179 self.respond('')
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180
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181 # write bundle data to temporary file because it can be big
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182 tempname = fp = None
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183 try:
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184 fd, tempname = tempfile.mkstemp(prefix='hg-unbundle-')
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185 fp = os.fdopen(fd, 'wb+')
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186
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187 count = int(self.fin.readline())
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188 while count:
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189 fp.write(self.fin.read(count))
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190 count = int(self.fin.readline())
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191
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192 was_locked = self.lock is not None
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193 if not was_locked:
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194 self.lock = self.repo.lock()
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195 try:
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196 if not check_heads():
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197 # someone else committed/pushed/unbundled while we
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198 # were transferring data
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199 self.respond(_('unsynced changes'))
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200 return
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201 self.respond('')
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202
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203 # push can proceed
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204
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205 fp.seek(0)
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206 r = self.repo.addchangegroup(fp, 'serve', self.client_url())
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207 self.respond(str(r))
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208 finally:
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209 if not was_locked:
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210 self.lock.release()
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211 self.lock = None
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212 finally:
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213 if fp is not None:
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214 fp.close()
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215 if tempname is not None:
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216 os.unlink(tempname)
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217
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218 def do_stream_out(self):
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219 try:
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220 for chunk in streamclone.stream_out(self.repo):
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221 self.fout.write(chunk)
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222 self.fout.flush()
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223 except streamclone.StreamException, inst:
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224 self.fout.write(str(inst))
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225 self.fout.flush()
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