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annotate mercurial/hgweb/common.py @ 9694:8269fe2d48f6

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hgweb: send proper error messages to the client Fixes a bug in protocol which caused an exception during exception handling in some cases on Windows. Also makes sure the server error message is correctly propagated to the client, instead of being thrown away.
author Sune Foldager <cryo@cyanite.org>
date Mon, 02 Nov 2009 10:20:04 +0100
parents 3b76321aa0de
children 6f92997dbdca 25e572394f5c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 # hgweb/common.py - Utility functions needed by hgweb_mod and hgwebdir_mod
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2 #
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3 # Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net>
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4 # Copyright 2005, 2006 Matt Mackall <mpm@selenic.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 import errno, mimetypes, os
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10
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11 HTTP_OK = 200
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12 HTTP_BAD_REQUEST = 400
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13 HTTP_UNAUTHORIZED = 401
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14 HTTP_FORBIDDEN = 403
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15 HTTP_NOT_FOUND = 404
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16 HTTP_METHOD_NOT_ALLOWED = 405
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17 HTTP_SERVER_ERROR = 500
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18
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19 class ErrorResponse(Exception):
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20 def __init__(self, code, message=None, headers=[]):
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21 Exception.__init__(self)
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22 self.code = code
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23 self.headers = headers
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24 if message is not None:
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25 self.message = message
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26 else:
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27 self.message = _statusmessage(code)
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28
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29 def _statusmessage(code):
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30 from BaseHTTPServer import BaseHTTPRequestHandler
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31 responses = BaseHTTPRequestHandler.responses
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32 return responses.get(code, ('Error', 'Unknown error'))[0]
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33
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34 def statusmessage(code, message=None):
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35 return '%d %s' % (code, message or _statusmessage(code))
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36
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37 def get_mtime(repo_path):
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38 store_path = os.path.join(repo_path, ".hg")
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39 if not os.path.isdir(os.path.join(store_path, "data")):
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40 store_path = os.path.join(store_path, "store")
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41 cl_path = os.path.join(store_path, "00changelog.i")
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42 if os.path.exists(cl_path):
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43 return os.stat(cl_path).st_mtime
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44 else:
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45 return os.stat(store_path).st_mtime
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46
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47 def staticfile(directory, fname, req):
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48 """return a file inside directory with guessed Content-Type header
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49
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50 fname always uses '/' as directory separator and isn't allowed to
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51 contain unusual path components.
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52 Content-Type is guessed using the mimetypes module.
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53 Return an empty string if fname is illegal or file not found.
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54
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55 """
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56 parts = fname.split('/')
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57 for part in parts:
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58 if (part in ('', os.curdir, os.pardir) or
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59 os.sep in part or os.altsep is not None and os.altsep in part):
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60 return ""
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61 fpath = os.path.join(*parts)
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62 if isinstance(directory, str):
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63 directory = [directory]
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64 for d in directory:
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65 path = os.path.join(d, fpath)
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66 if os.path.exists(path):
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67 break
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68 try:
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69 os.stat(path)
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70 ct = mimetypes.guess_type(path)[0] or "text/plain"
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71 req.respond(HTTP_OK, ct, length = os.path.getsize(path))
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72 return open(path, 'rb').read()
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73 except TypeError:
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74 raise ErrorResponse(HTTP_SERVER_ERROR, 'illegal filename')
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75 except OSError, err:
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76 if err.errno == errno.ENOENT:
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77 raise ErrorResponse(HTTP_NOT_FOUND)
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78 else:
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79 raise ErrorResponse(HTTP_SERVER_ERROR, err.strerror)
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80
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81 def paritygen(stripecount, offset=0):
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82 """count parity of horizontal stripes for easier reading"""
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83 if stripecount and offset:
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84 # account for offset, e.g. due to building the list in reverse
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85 count = (stripecount + offset) % stripecount
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86 parity = (stripecount + offset) / stripecount & 1
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87 else:
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88 count = 0
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89 parity = 0
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90 while True:
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91 yield parity
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92 count += 1
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93 if stripecount and count >= stripecount:
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94 parity = 1 - parity
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95 count = 0
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96
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97 def get_contact(config):
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98 """Return repo contact information or empty string.
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99
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100 web.contact is the primary source, but if that is not set, try
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101 ui.username or $EMAIL as a fallback to display something useful.
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102 """
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103 return (config("web", "contact") or
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104 config("ui", "username") or
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105 os.environ.get("EMAIL") or "")