serve: don't send any content headers with 304 responses

Fixes HTTP protocol violation introduced in cf5c76017e11. 'hg serve' would show
a stacktrace when loading pages that not had been modified.

There was test coverage for this, but the wrong response headers wasn't shown
and thus not detected.

mercurial/hgweb/server.py

@@ -1,329 +1,330
 # hgweb/server.py - The standalone hg web server.
 #
 # Copyright 21 May 2005 - (c) 2005 Jake Edge <[e-mail]>
 # Copyright 2005-2007 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 import os, sys, errno, urllib, BaseHTTPServer, socket, SocketServer, traceback
 from mercurial import util, error
 from mercurial.hgweb import common
 from mercurial.i18n import _
 
 def _splitURI(uri):
     """Return path and query that has been split from uri
 
     Just like CGI environment, the path is unquoted, the query is
     not.
     """
     if '?' in uri:
         path, query = uri.split('?', 1)
     else:
         path, query = uri, ''
     return urllib.unquote(path), query
 
 class _error_logger(object):
     def __init__(self, handler):
         self.handler = handler
     def flush(self):
         pass
     def write(self, str):
         self.writelines(str.split('\n'))
     def writelines(self, seq):
         for msg in seq:
             self.handler.log_error("HG error:  %s", msg)
 
 class _httprequesthandler(BaseHTTPServer.BaseHTTPRequestHandler):
 
     url_scheme = 'http'
 
     @staticmethod
     def preparehttpserver(httpserver, ssl_cert):
         """Prepare .socket of new HTTPServer instance"""
         pass
 
     def __init__(self, *args, **kargs):
         self.protocol_version = 'HTTP/1.1'
         BaseHTTPServer.BaseHTTPRequestHandler.__init__(self, *args, **kargs)
 
     def _log_any(self, fp, format, *args):
         fp.write("%s - - [%s] %s\n" % (self.client_address[0],
                                        self.log_date_time_string(),
                                        format % args))
         fp.flush()
 
     def log_error(self, format, *args):
         self._log_any(self.server.errorlog, format, *args)
 
     def log_message(self, format, *args):
         self._log_any(self.server.accesslog, format, *args)
 
     def log_request(self, code='-', size='-'):
         xheaders = [h for h in self.headers.items() if h[0].startswith('x-')]
         self.log_message('"%s" %s %s%s',
                          self.requestline, str(code), str(size),
                          ''.join([' %s:%s' % h for h in sorted(xheaders)]))
 
     def do_write(self):
         try:
             self.do_hgweb()
         except socket.error, inst:
             if inst[0] != errno.EPIPE:
                 raise
 
     def do_POST(self):
         try:
             self.do_write()
         except Exception:
             self._start_response("500 Internal Server Error", [])
             self._write("Internal Server Error")
             tb = "".join(traceback.format_exception(*sys.exc_info()))
             self.log_error("Exception happened during processing "
                            "request '%s':\n%s", self.path, tb)
 
     def do_GET(self):
         self.do_POST()
 
     def do_hgweb(self):
         path, query = _splitURI(self.path)
 
         env = {}
         env['GATEWAY_INTERFACE'] = 'CGI/1.1'
         env['REQUEST_METHOD'] = self.command
         env['SERVER_NAME'] = self.server.server_name
         env['SERVER_PORT'] = str(self.server.server_port)
         env['REQUEST_URI'] = self.path
         env['SCRIPT_NAME'] = self.server.prefix
         env['PATH_INFO'] = path[len(self.server.prefix):]
         env['REMOTE_HOST'] = self.client_address[0]
         env['REMOTE_ADDR'] = self.client_address[0]
         if query:
             env['QUERY_STRING'] = query
 
         if self.headers.typeheader is None:
             env['CONTENT_TYPE'] = self.headers.type
         else:
             env['CONTENT_TYPE'] = self.headers.typeheader
         length = self.headers.getheader('content-length')
         if length:
             env['CONTENT_LENGTH'] = length
         for header in [h for h in self.headers.keys()
                        if h not in ('content-type', 'content-length')]:
             hkey = 'HTTP_' + header.replace('-', '_').upper()
             hval = self.headers.getheader(header)
             hval = hval.replace('\n', '').strip()
             if hval:
                 env[hkey] = hval
         env['SERVER_PROTOCOL'] = self.request_version
         env['wsgi.version'] = (1, 0)
         env['wsgi.url_scheme'] = self.url_scheme
         if env.get('HTTP_EXPECT', '').lower() == '100-continue':
             self.rfile = common.continuereader(self.rfile, self.wfile.write)
 
         env['wsgi.input'] = self.rfile
         env['wsgi.errors'] = _error_logger(self)
         env['wsgi.multithread'] = isinstance(self.server,
                                              SocketServer.ThreadingMixIn)
         env['wsgi.multiprocess'] = isinstance(self.server,
                                               SocketServer.ForkingMixIn)
         env['wsgi.run_once'] = 0
 
         self.saved_status = None
         self.saved_headers = []
         self.sent_headers = False
         self.length = None
         self._chunked = None
         for chunk in self.server.application(env, self._start_response):
             self._write(chunk)
         if not self.sent_headers:
             self.send_headers()
         self._done()
 
     def send_headers(self):
         if not self.saved_status:
             raise AssertionError("Sending headers before "
                                  "start_response() called")
         saved_status = self.saved_status.split(None, 1)
         saved_status[0] = int(saved_status[0])
         self.send_response(*saved_status)
         self.length = None
         self._chunked = False
         for h in self.saved_headers:
             self.send_header(*h)
             if h[0].lower() == 'content-length':
                 self.length = int(h[1])
-        if self.length is None:
+        if (self.length is None and
+            saved_status[0] != common.HTTP_NOT_MODIFIED):
             self._chunked = (not self.close_connection and
                              self.request_version == "HTTP/1.1")
             if self._chunked:
                 self.send_header('Transfer-Encoding', 'chunked')
             else:
                 self.send_header('Connection', 'close')
         self.end_headers()
         self.sent_headers = True
 
     def _start_response(self, http_status, headers, exc_info=None):
         code, msg = http_status.split(None, 1)
         code = int(code)
         self.saved_status = http_status
         bad_headers = ('connection', 'transfer-encoding')
         self.saved_headers = [h for h in headers
                               if h[0].lower() not in bad_headers]
         return self._write
 
     def _write(self, data):
         if not self.saved_status:
             raise AssertionError("data written before start_response() called")
         elif not self.sent_headers:
             self.send_headers()
         if self.length is not None:
             if len(data) > self.length:
                 raise AssertionError("Content-length header sent, but more "
                                      "bytes than specified are being written.")
             self.length = self.length - len(data)
         elif self._chunked and data:
             data = '%x\r\n%s\r\n' % (len(data), data)
         self.wfile.write(data)
         self.wfile.flush()
 
     def _done(self):
         if self._chunked:
             self.wfile.write('0\r\n\r\n')
             self.wfile.flush()
 
 class _httprequesthandleropenssl(_httprequesthandler):
     """HTTPS handler based on pyOpenSSL"""
 
     url_scheme = 'https'
 
     @staticmethod
     def preparehttpserver(httpserver, ssl_cert):
         try:
             import OpenSSL
             OpenSSL.SSL.Context
         except ImportError:
             raise util.Abort(_("SSL support is unavailable"))
         ctx = OpenSSL.SSL.Context(OpenSSL.SSL.SSLv23_METHOD)
         ctx.use_privatekey_file(ssl_cert)
         ctx.use_certificate_file(ssl_cert)
         sock = socket.socket(httpserver.address_family, httpserver.socket_type)
         httpserver.socket = OpenSSL.SSL.Connection(ctx, sock)
         httpserver.server_bind()
         httpserver.server_activate()
 
     def setup(self):
         self.connection = self.request
         self.rfile = socket._fileobject(self.request, "rb", self.rbufsize)
         self.wfile = socket._fileobject(self.request, "wb", self.wbufsize)
 
     def do_write(self):
         import OpenSSL
         try:
             _httprequesthandler.do_write(self)
         except OpenSSL.SSL.SysCallError, inst:
             if inst.args[0] != errno.EPIPE:
                 raise
 
     def handle_one_request(self):
         import OpenSSL
         try:
             _httprequesthandler.handle_one_request(self)
         except (OpenSSL.SSL.SysCallError, OpenSSL.SSL.ZeroReturnError):
             self.close_connection = True
             pass
 
 class _httprequesthandlerssl(_httprequesthandler):
     """HTTPS handler based on Pythons ssl module (introduced in 2.6)"""
 
     url_scheme = 'https'
 
     @staticmethod
     def preparehttpserver(httpserver, ssl_cert):
         try:
             import ssl
             ssl.wrap_socket
         except ImportError:
             raise util.Abort(_("SSL support is unavailable"))
         httpserver.socket = ssl.wrap_socket(httpserver.socket, server_side=True,
             certfile=ssl_cert, ssl_version=ssl.PROTOCOL_SSLv23)
 
     def setup(self):
         self.connection = self.request
         self.rfile = socket._fileobject(self.request, "rb", self.rbufsize)
         self.wfile = socket._fileobject(self.request, "wb", self.wbufsize)
 
 try:
     from threading import activeCount
     activeCount() # silence pyflakes
     _mixin = SocketServer.ThreadingMixIn
 except ImportError:
     if util.safehasattr(os, "fork"):
         _mixin = SocketServer.ForkingMixIn
     else:
         class _mixin(object):
             pass
 
 def openlog(opt, default):
     if opt and opt != '-':
         return open(opt, 'a')
     return default
 
 class MercurialHTTPServer(object, _mixin, BaseHTTPServer.HTTPServer):
 
     # SO_REUSEADDR has broken semantics on windows
     if os.name == 'nt':
         allow_reuse_address = 0
 
     def __init__(self, ui, app, addr, handler, **kwargs):
         BaseHTTPServer.HTTPServer.__init__(self, addr, handler, **kwargs)
         self.daemon_threads = True
         self.application = app
 
         handler.preparehttpserver(self, ui.config('web', 'certificate'))
 
         prefix = ui.config('web', 'prefix', '')
         if prefix:
             prefix = '/' + prefix.strip('/')
         self.prefix = prefix
 
         alog = openlog(ui.config('web', 'accesslog', '-'), sys.stdout)
         elog = openlog(ui.config('web', 'errorlog', '-'), sys.stderr)
         self.accesslog = alog
         self.errorlog = elog
 
         self.addr, self.port = self.socket.getsockname()[0:2]
         self.fqaddr = socket.getfqdn(addr[0])
 
 class IPv6HTTPServer(MercurialHTTPServer):
     address_family = getattr(socket, 'AF_INET6', None)
     def __init__(self, *args, **kwargs):
         if self.address_family is None:
             raise error.RepoError(_('IPv6 is not available on this system'))
         super(IPv6HTTPServer, self).__init__(*args, **kwargs)
 
 def create_server(ui, app):
 
     if ui.config('web', 'certificate'):
         if sys.version_info >= (2, 6):
             handler = _httprequesthandlerssl
         else:
             handler = _httprequesthandleropenssl
     else:
         handler = _httprequesthandler
 
     if ui.configbool('web', 'ipv6'):
         cls = IPv6HTTPServer
     else:
         cls = MercurialHTTPServer
 
     # ugly hack due to python issue5853 (for threaded use)
     import mimetypes; mimetypes.init()
 
     address = ui.config('web', 'address', '')
     port = util.getport(ui.config('web', 'port', 8000))
     try:
         return cls(ui, app, (address, port), handler)
     except socket.error, inst:
         raise util.Abort(_("cannot start server at '%s:%d': %s")
                          % (address, port, inst.args[1]))

tests/get-with-headers.py

@@ -1,53 +1,55
 #!/usr/bin/env python
 
 """This does HTTP GET requests given a host:port and path and returns
 a subset of the headers plus the body of the result."""
 
 import httplib, sys
 
 try:
     import msvcrt, os
     msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)
     msvcrt.setmode(sys.stderr.fileno(), os.O_BINARY)
 except ImportError:
     pass
 
 twice = False
 if '--twice' in sys.argv:
     sys.argv.remove('--twice')
     twice = True
 
 reasons = {'Not modified': 'Not Modified'} # python 2.4
 
 tag = None
 def request(host, path, show):
     assert not path.startswith('/'), path
     global tag
     headers = {}
     if tag:
         headers['If-None-Match'] = tag
 
     conn = httplib.HTTPConnection(host)
     conn.request("GET", '/' + path, None, headers)
     response = conn.getresponse()
     print response.status, reasons.get(response.reason, response.reason)
+    if show[:1] == ['-']:
+        show = [h for h, v in response.getheaders() if h.lower() not in show]
     for h in [h.lower() for h in show]:
         if response.getheader(h, None) is not None:
             print "%s: %s" % (h, response.getheader(h))
 
     print
     data = response.read()
     sys.stdout.write(data)
 
     if twice and response.getheader('ETag', None):
         tag = response.getheader('ETag')
 
     return response.status
 
 status = request(sys.argv[1], sys.argv[2], sys.argv[3:])
 if twice:
     status = request(sys.argv[1], sys.argv[2], sys.argv[3:])
 
 if 200 <= status <= 305:
     sys.exit(0)
 sys.exit(1)

tests/test-hgweb.t

@@ -1,492 +1,494
   $ "$TESTDIR/hghave" serve || exit 80
 
 Some tests for hgweb. Tests static files, plain files and different 404's.
 
   $ hg init test
   $ cd test
   $ mkdir da
   $ echo foo > da/foo
   $ echo foo > foo
   $ hg ci -Ambase
   adding da/foo
   adding foo
   $ hg serve -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
   $ cat hg.pid >> $DAEMON_PIDS
 
 manifest
 
   $ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'file/tip/?style=raw')
   200 Script output follows
   
   
   drwxr-xr-x da
   -rw-r--r-- 4 foo
   
   
   $ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'file/tip/da?style=raw')
   200 Script output follows
   
   
   -rw-r--r-- 4 foo
   
   
 
 plain file
 
   $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'file/tip/foo?style=raw'
   200 Script output follows
   
   foo
 
 should give a 404 - static file that does not exist
 
   $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'static/bogus'
   404 Not Found
   
   <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
   <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">
   <head>
   <link rel="icon" href="/static/hgicon.png" type="image/png" />
   <meta name="robots" content="index, nofollow" />
   <link rel="stylesheet" href="/static/style-paper.css" type="text/css" />
   <script type="text/javascript" src="/static/mercurial.js"></script>
   
   <title>test: error</title>
   </head>
   <body>
   
   <div class="container">
   <div class="menu">
   <div class="logo">
   <a href="http://mercurial.selenic.com/">
   <img src="/static/hglogo.png" width=75 height=90 border=0 alt="mercurial" /></a>
   </div>
   <ul>
   <li><a href="/shortlog">log</a></li>
   <li><a href="/graph">graph</a></li>
   <li><a href="/tags">tags</a></li>
   <li><a href="/bookmarks">bookmarks</a></li>
   <li><a href="/branches">branches</a></li>
   </ul>
   <ul>
   <li><a href="/help">help</a></li>
   </ul>
   </div>
   
   <div class="main">
   
   <h2 class="breadcrumb"><a href="/">Mercurial</a> </h2>
   <h3>error</h3>
   
   <form class="search" action="/log">
   
   <p><input name="rev" id="search1" type="text" size="30"></p>
   <div id="hint">find changesets by author, revision,
   files, or words in the commit message</div>
   </form>
   
   <div class="description">
   <p>
   An error occurred while processing your request:
   </p>
   <p>
   Not Found
   </p>
   </div>
   </div>
   </div>
   
   <script type="text/javascript">process_dates()</script>
   
   
   </body>
   </html>
   
   [1]
 
 should give a 404 - bad revision
 
   $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'file/spam/foo?style=raw'
   404 Not Found
   
   
   error: revision not found: spam
   [1]
 
 should give a 400 - bad command
 
   $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'file/tip/foo?cmd=spam&style=raw'
   400* (glob)
   
   
   error: no such method: spam
   [1]
 
 should give a 404 - file does not exist
 
   $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'file/tip/bork?style=raw'
   404 Not Found
   
   
   error: bork@2ef0ac749a14: not found in manifest
   [1]
   $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'file/tip/bork'
   404 Not Found
   
   <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
   <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">
   <head>
   <link rel="icon" href="/static/hgicon.png" type="image/png" />
   <meta name="robots" content="index, nofollow" />
   <link rel="stylesheet" href="/static/style-paper.css" type="text/css" />
   <script type="text/javascript" src="/static/mercurial.js"></script>
   
   <title>test: error</title>
   </head>
   <body>
   
   <div class="container">
   <div class="menu">
   <div class="logo">
   <a href="http://mercurial.selenic.com/">
   <img src="/static/hglogo.png" width=75 height=90 border=0 alt="mercurial" /></a>
   </div>
   <ul>
   <li><a href="/shortlog">log</a></li>
   <li><a href="/graph">graph</a></li>
   <li><a href="/tags">tags</a></li>
   <li><a href="/bookmarks">bookmarks</a></li>
   <li><a href="/branches">branches</a></li>
   </ul>
   <ul>
   <li><a href="/help">help</a></li>
   </ul>
   </div>
   
   <div class="main">
   
   <h2 class="breadcrumb"><a href="/">Mercurial</a> </h2>
   <h3>error</h3>
   
   <form class="search" action="/log">
   
   <p><input name="rev" id="search1" type="text" size="30"></p>
   <div id="hint">find changesets by author, revision,
   files, or words in the commit message</div>
   </form>
   
   <div class="description">
   <p>
   An error occurred while processing your request:
   </p>
   <p>
   bork@2ef0ac749a14: not found in manifest
   </p>
   </div>
   </div>
   </div>
   
   <script type="text/javascript">process_dates()</script>
   
   
   </body>
   </html>
   
   [1]
   $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'diff/tip/bork?style=raw'
   404 Not Found
   
   
   error: bork@2ef0ac749a14: not found in manifest
   [1]
 
 try bad style
 
   $ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'file/tip/?style=foobar')
   200 Script output follows
   
   <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
   <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">
   <head>
   <link rel="icon" href="/static/hgicon.png" type="image/png" />
   <meta name="robots" content="index, nofollow" />
   <link rel="stylesheet" href="/static/style-paper.css" type="text/css" />
   <script type="text/javascript" src="/static/mercurial.js"></script>
   
   <title>test: 2ef0ac749a14 /</title>
   </head>
   <body>
   
   <div class="container">
   <div class="menu">
   <div class="logo">
   <a href="http://mercurial.selenic.com/">
   <img src="/static/hglogo.png" alt="mercurial" /></a>
   </div>
   <ul>
   <li><a href="/shortlog/2ef0ac749a14">log</a></li>
   <li><a href="/graph/2ef0ac749a14">graph</a></li>
   <li><a href="/tags">tags</a></li>
   <li><a href="/bookmarks">bookmarks</a></li>
   <li><a href="/branches">branches</a></li>
   </ul>
   <ul>
   <li><a href="/rev/2ef0ac749a14">changeset</a></li>
   <li class="active">browse</li>
   </ul>
   <ul>
   
   </ul>
   <ul>
    <li><a href="/help">help</a></li>
   </ul>
   </div>
   
   <div class="main">
   <h2 class="breadcrumb"><a href="/">Mercurial</a> </h2>
   <h3>directory / @ 0:2ef0ac749a14 <span class="tag">tip</span> </h3>
   
   <form class="search" action="/log">
   
   <p><input name="rev" id="search1" type="text" size="30" /></p>
   <div id="hint">find changesets by author, revision,
   files, or words in the commit message</div>
   </form>
   
   <table class="bigtable">
   <tr>
     <th class="name">name</th>
     <th class="size">size</th>
     <th class="permissions">permissions</th>
   </tr>
   <tr class="fileline parity0">
     <td class="name"><a href="/file/2ef0ac749a14/">[up]</a></td>
     <td class="size"></td>
     <td class="permissions">drwxr-xr-x</td>
   </tr>
   
   <tr class="fileline parity1">
   <td class="name">
   <a href="/file/2ef0ac749a14/da">
   <img src="/static/coal-folder.png" alt="dir."/> da/
   </a>
   <a href="/file/2ef0ac749a14/da/">
   
   </a>
   </td>
   <td class="size"></td>
   <td class="permissions">drwxr-xr-x</td>
   </tr>
   
   <tr class="fileline parity0">
   <td class="filename">
   <a href="/file/2ef0ac749a14/foo">
   <img src="/static/coal-file.png" alt="file"/> foo
   </a>
   </td>
   <td class="size">4</td>
   <td class="permissions">-rw-r--r--</td>
   </tr>
   </table>
   </div>
   </div>
   <script type="text/javascript">process_dates()</script>
   
   
   </body>
   </html>
   
 
 stop and restart
 
   $ "$TESTDIR/killdaemons.py" $DAEMON_PIDS
   $ hg serve -p $HGPORT -d --pid-file=hg.pid -A access.log
   $ cat hg.pid >> $DAEMON_PIDS
 
 Test the access/error files are opened in append mode
 
   $ python -c "print len(file('access.log').readlines()), 'log lines written'"
   10 log lines written
 
 static file
 
-  $ "$TESTDIR/get-with-headers.py" --twice localhost:$HGPORT 'static/style-gitweb.css'
+  $ "$TESTDIR/get-with-headers.py" --twice localhost:$HGPORT 'static/style-gitweb.css' - date etag server
   200 Script output follows
+  content-length: 4619
+  content-type: text/css
   
   body { font-family: sans-serif; font-size: 12px; margin:0px; border:solid #d9d8d1; border-width:1px; margin:10px; }
   a { color:#0000cc; }
   a:hover, a:visited, a:active { color:#880000; }
   div.page_header { height:25px; padding:8px; font-size:18px; font-weight:bold; background-color:#d9d8d1; }
   div.page_header a:visited { color:#0000cc; }
   div.page_header a:hover { color:#880000; }
   div.page_nav { padding:8px; }
   div.page_nav a:visited { color:#0000cc; }
   div.page_path { padding:8px; border:solid #d9d8d1; border-width:0px 0px 1px}
   div.page_footer { padding:4px 8px; background-color: #d9d8d1; }
   div.page_footer_text { float:left; color:#555555; font-style:italic; }
   div.page_body { padding:8px; }
   div.title, a.title {
   	display:block; padding:6px 8px;
   	font-weight:bold; background-color:#edece6; text-decoration:none; color:#000000;
   }
   a.title:hover { background-color: #d9d8d1; }
   div.title_text { padding:6px 0px; border: solid #d9d8d1; border-width:0px 0px 1px; }
   div.log_body { padding:8px 8px 8px 150px; }
   .age { white-space:nowrap; }
   span.age { position:relative; float:left; width:142px; font-style:italic; }
   div.log_link {
   	padding:0px 8px;
   	font-size:10px; font-family:sans-serif; font-style:normal;
   	position:relative; float:left; width:136px;
   }
   div.list_head { padding:6px 8px 4px; border:solid #d9d8d1; border-width:1px 0px 0px; font-style:italic; }
   a.list { text-decoration:none; color:#000000; }
   a.list:hover { text-decoration:underline; color:#880000; }
   table { padding:8px 4px; }
   th { padding:2px 5px; font-size:12px; text-align:left; }
   tr.light:hover, .parity0:hover { background-color:#edece6; }
   tr.dark, .parity1 { background-color:#f6f6f0; }
   tr.dark:hover, .parity1:hover { background-color:#edece6; }
   td { padding:2px 5px; font-size:12px; vertical-align:top; }
   td.closed { background-color: #99f; }
   td.link { padding:2px 5px; font-family:sans-serif; font-size:10px; }
   td.indexlinks { white-space: nowrap; }
   td.indexlinks a {
     padding: 2px 5px; line-height: 10px;
     border: 1px solid;
     color: #ffffff; background-color: #7777bb;
     border-color: #aaaadd #333366 #333366 #aaaadd;
     font-weight: bold;  text-align: center; text-decoration: none;
     font-size: 10px;
   }
   td.indexlinks a:hover { background-color: #6666aa; }
   div.pre { font-family:monospace; font-size:12px; white-space:pre; }
   div.diff_info { font-family:monospace; color:#000099; background-color:#edece6; font-style:italic; }
   div.index_include { border:solid #d9d8d1; border-width:0px 0px 1px; padding:12px 8px; }
   div.search { margin:4px 8px; position:absolute; top:56px; right:12px }
   .linenr { color:#999999; text-decoration:none }
   div.rss_logo { float: right; white-space: nowrap; }
   div.rss_logo a {
   	padding:3px 6px; line-height:10px;
   	border:1px solid; border-color:#fcc7a5 #7d3302 #3e1a01 #ff954e;
   	color:#ffffff; background-color:#ff6600;
   	font-weight:bold; font-family:sans-serif; font-size:10px;
   	text-align:center; text-decoration:none;
   }
   div.rss_logo a:hover { background-color:#ee5500; }
   pre { margin: 0; }
   span.logtags span {
   	padding: 0px 4px;
   	font-size: 10px;
   	font-weight: normal;
   	border: 1px solid;
   	background-color: #ffaaff;
   	border-color: #ffccff #ff00ee #ff00ee #ffccff;
   }
   span.logtags span.tagtag {
   	background-color: #ffffaa;
   	border-color: #ffffcc #ffee00 #ffee00 #ffffcc;
   }
   span.logtags span.branchtag {
   	background-color: #aaffaa;
   	border-color: #ccffcc #00cc33 #00cc33 #ccffcc;
   }
   span.logtags span.inbranchtag {
   	background-color: #d5dde6;
   	border-color: #e3ecf4 #9398f4 #9398f4 #e3ecf4;
   }
   span.logtags span.bookmarktag {
   	background-color: #afdffa;
   	border-color: #ccecff #46ace6 #46ace6 #ccecff;
   }
   
   /* Graph */
   div#wrapper {
   	position: relative;
   	margin: 0;
   	padding: 0;
   	margin-top: 3px;
   }
   
   canvas {
   	position: absolute;
   	z-index: 5;
   	top: -0.9em;
   	margin: 0;
   }
   
   ul#nodebgs {
   	list-style: none inside none;
   	padding: 0;
   	margin: 0;
   	top: -0.7em;
   }
   
   ul#graphnodes li, ul#nodebgs li {
   	height: 39px;
   }
   
   ul#graphnodes {
   	position: absolute;
   	z-index: 10;
   	top: -0.8em;
   	list-style: none inside none;
   	padding: 0;
   }
   
   ul#graphnodes li .info {
   	display: block;
   	font-size: 100%;
   	position: relative;
   	top: -3px;
   	font-style: italic;
   }
   
   /* Comparison */
   .legend {
       padding: 1.5% 0 1.5% 0;
   }
   
   .legendinfo {
       border: 1px solid #d9d8d1;
       font-size: 80%;
       text-align: center;
       padding: 0.5%;
   }
   
   .equal {
       background-color: #ffffff;
   }
   
   .delete {
       background-color: #faa;
       color: #333;
   }
   
   .insert {
       background-color: #ffa;
   }
   
   .replace {
       background-color: #e8e8e8;
   }
   
   .comparison {
       overflow-x: auto;
   }
   
   .header th {
       text-align: center;
   }
   
   .block {
       border-top: 1px solid #d9d8d1;
   }
   304 Not Modified
   
 
 errors
 
   $ cat errors.log
 
   $ cd ..