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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):
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35 return '%d %s' % (code, _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 file(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 "")
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