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Viewing changes to html/TF_BitTornado/BitTornado/HTTPHandler.py

  • Committer: Bazaar Package Importer
  • Author(s): Cameron Dale
  • Date: 2006-04-14 15:13:06 UTC
  • Revision ID: james.westby@ubuntu.com-20060414151306-dwc5yc3hof3l2kmf
Tags: upstream-2.1
Import upstream version 2.1

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html/TF_BitTornado/BitTornado/HTTPHandler.py
 
1
# Written by Bram Cohen
 
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# see LICENSE.txt for license information
 
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from cStringIO import StringIO
 
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from sys import stdout
 
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import time
 
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from clock import clock
 
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from gzip import GzipFile
 
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try:
 
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    True
 
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except:
 
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    True = 1
 
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    False = 0
 
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DEBUG = False
 
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weekdays = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
 
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months = [None, 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
 
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    'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
 
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class HTTPConnection:
 
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    def __init__(self, handler, connection):
 
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        self.handler = handler
 
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        self.connection = connection
 
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        self.buf = ''
 
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        self.closed = False
 
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        self.done = False
 
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        self.donereading = False
 
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        self.next_func = self.read_type
 
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    def get_ip(self):
 
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        return self.connection.get_ip()
 
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    def data_came_in(self, data):
 
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        if self.donereading or self.next_func is None:
 
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            return True
 
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        self.buf += data
 
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        while True:
 
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            try:
 
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                i = self.buf.index('\n')
 
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            except ValueError:
 
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                return True
 
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            val = self.buf[:i]
 
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            self.buf = self.buf[i+1:]
 
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            self.next_func = self.next_func(val)
 
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            if self.donereading:
 
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                return True
 
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            if self.next_func is None or self.closed:
 
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                return False
 
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    def read_type(self, data):
 
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        self.header = data.strip()
 
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        words = data.split()
 
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        if len(words) == 3:
 
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            self.command, self.path, garbage = words
 
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            self.pre1 = False
 
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        elif len(words) == 2:
 
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            self.command, self.path = words
 
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            self.pre1 = True
 
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            if self.command != 'GET':
 
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                return None
 
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        else:
 
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            return None
 
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        if self.command not in ('HEAD', 'GET'):
 
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            return None
 
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        self.headers = {}
 
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        return self.read_header
 
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    def read_header(self, data):
 
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        data = data.strip()
 
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        if data == '':
 
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            self.donereading = True
 
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            if self.headers.get('accept-encoding','').find('gzip') > -1:
 
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                self.encoding = 'gzip'
 
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            else:
 
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                self.encoding = 'identity'
 
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            r = self.handler.getfunc(self, self.path, self.headers)
 
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            if r is not None:
 
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                self.answer(r)
 
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            return None
 
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        try:
 
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            i = data.index(':')
 
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        except ValueError:
 
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            return None
 
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        self.headers[data[:i].strip().lower()] = data[i+1:].strip()
 
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        if DEBUG:
 
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            print data[:i].strip() + ": " + data[i+1:].strip()
 
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        return self.read_header
 
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    def answer(self, (responsecode, responsestring, headers, data)):
 
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        if self.closed:
 
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            return
 
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        if self.encoding == 'gzip':
 
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            compressed = StringIO()
 
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            gz = GzipFile(fileobj = compressed, mode = 'wb', compresslevel = 9)
 
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            gz.write(data)
 
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            gz.close()
 
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            cdata = compressed.getvalue()
 
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            if len(cdata) >= len(data):
 
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                self.encoding = 'identity'
 
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            else:
 
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                if DEBUG:
 
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                   print "Compressed: %i  Uncompressed: %i\n" % (len(cdata),len(data))
 
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                data = cdata
 
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                headers['Content-Encoding'] = 'gzip'
 
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        # i'm abusing the identd field here, but this should be ok
 
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        if self.encoding == 'identity':
 
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            ident = '-'
 
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        else:
 
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            ident = self.encoding
 
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        self.handler.log( self.connection.get_ip(), ident, '-',
 
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                          self.header, responsecode, len(data),
 
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                          self.headers.get('referer','-'),
 
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                          self.headers.get('user-agent','-') )
 
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        self.done = True
 
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        r = StringIO()
 
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        r.write('HTTP/1.0 ' + str(responsecode) + ' ' + 
 
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            responsestring + '\r\n')
 
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        if not self.pre1:
 
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            headers['Content-Length'] = len(data)
 
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            for key, value in headers.items():
 
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                r.write(key + ': ' + str(value) + '\r\n')
 
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            r.write('\r\n')
 
126
        if self.command != 'HEAD':
 
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            r.write(data)
 
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        self.connection.write(r.getvalue())
 
129
        if self.connection.is_flushed():
 
130
            self.connection.shutdown(1)
 
131
 
 
132
class HTTPHandler:
 
133
    def __init__(self, getfunc, minflush):
 
134
        self.connections = {}
 
135
        self.getfunc = getfunc
 
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        self.minflush = minflush
 
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        self.lastflush = clock()
 
138
 
 
139
    def external_connection_made(self, connection):
 
140
        self.connections[connection] = HTTPConnection(self, connection)
 
141
 
 
142
    def connection_flushed(self, connection):
 
143
        if self.connections[connection].done:
 
144
            connection.shutdown(1)
 
145
 
 
146
    def connection_lost(self, connection):
 
147
        ec = self.connections[connection]
 
148
        ec.closed = True
 
149
        del ec.connection
 
150
        del ec.next_func
 
151
        del self.connections[connection]
 
152
 
 
153
    def data_came_in(self, connection, data):
 
154
        c = self.connections[connection]
 
155
        if not c.data_came_in(data) and not c.closed:
 
156
            c.connection.shutdown(1)
 
157
 
 
158
    def log(self, ip, ident, username, header,
 
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            responsecode, length, referrer, useragent):
 
160
        year, month, day, hour, minute, second, a, b, c = time.localtime(time.time())
 
161
        print '%s %s %s [%02d/%3s/%04d:%02d:%02d:%02d] "%s" %i %i "%s" "%s"' % (
 
162
            ip, ident, username, day, months[month], year, hour,
 
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            minute, second, header, responsecode, length, referrer, useragent)
 
164
        t = clock()
 
165
        if t - self.lastflush > self.minflush:
 
166
            self.lastflush = t
 
167
            stdout.flush()