+++ /dev/null
-"""
-@author: Laszlo Nagy
-@copyright: (c) 2005 by Szoftver Messias Bt.
-@licence: BSD style
-
-Objects of the MozillaEmulator class can emulate a browser that is capable of:
-
- - cookie management
- - configurable user agent string
- - GET and POST
- - multipart POST (send files)
- - receive content into file
-
-I have seen many requests on the python mailing list about how to emulate a browser. I'm using this class for years now, without any problems. This is how you can use it:
-
- 1. Use firefox
- 2. Install and open the livehttpheaders plugin
- 3. Use the website manually with firefox
- 4. Check the GET and POST requests in the livehttpheaders capture window
- 5. Create an instance of the above class and send the same GET and POST requests to the server.
-
-Optional steps:
-
- - You can change user agent string in the build_opened method
- - The "encode_multipart_formdata" function can be used alone to create POST data from a list of field values and files
-"""
-
-import urllib2
-import cookielib
-import logging
-
-import socket
-
-
-_moduleLogger = logging.getLogger(__name__)
-socket.setdefaulttimeout(25)
-
-
-def add_proxy(protocol, url, port):
- proxyInfo = "%s:%s" % (url, port)
- proxy = urllib2.ProxyHandler(
- {protocol: proxyInfo}
- )
- opener = urllib2.build_opener(proxy)
- urllib2.install_opener(opener)
-
-
-class MozillaEmulator(object):
-
- USER_AGENT = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.1.4) Gecko/20091016 Firefox/3.5.4 (.NET CLR 3.5.30729)'
- #USER_AGENT = "Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_0 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7A341 Safari/528.16"
-
- def __init__(self, trycount = 1):
- """Create a new MozillaEmulator object.
-
- @param trycount: The download() method will retry the operation if it
- fails. You can specify -1 for infinite retrying. A value of 0 means no
- retrying. A value of 1 means one retry. etc."""
- self.debug = False
- self.trycount = trycount
- self._cookies = cookielib.LWPCookieJar()
- self._loadedFromCookies = False
- self._storeCookies = False
-
- def load_cookies(self, path):
- assert not self._loadedFromCookies, "Load cookies only once"
- if path is None:
- return
-
- self._cookies.filename = path
- try:
- self._cookies.load()
- except cookielib.LoadError:
- _moduleLogger.exception("Bad cookie file")
- except IOError:
- _moduleLogger.exception("No cookie file")
- except Exception, e:
- _moduleLogger.exception("Unknown error with cookies")
- else:
- self._loadedFromCookies = True
- self._storeCookies = True
-
- return self._loadedFromCookies
-
- def save_cookies(self):
- if self._storeCookies:
- self._cookies.save()
-
- def clear_cookies(self):
- if self._storeCookies:
- self._cookies.clear()
-
- def download(self, url,
- postdata = None, extraheaders = None, forbidRedirect = False,
- trycount = None, only_head = False,
- ):
- """Download an URL with GET or POST methods.
-
- @param postdata: It can be a string that will be POST-ed to the URL.
- When None is given, the method will be GET instead.
- @param extraheaders: You can add/modify HTTP headers with a dict here.
- @param forbidRedirect: Set this flag if you do not want to handle
- HTTP 301 and 302 redirects.
- @param trycount: Specify the maximum number of retries here.
- 0 means no retry on error. Using -1 means infinite retring.
- None means the default value (that is self.trycount).
- @param only_head: Create the openerdirector and return it. In other
- words, this will not retrieve any content except HTTP headers.
-
- @return: The raw HTML page data
- """
- _moduleLogger.debug("Performing download of %s" % url)
-
- if extraheaders is None:
- extraheaders = {}
- if trycount is None:
- trycount = self.trycount
- cnt = 0
-
- while True:
- try:
- req, u = self._build_opener(url, postdata, extraheaders, forbidRedirect)
- openerdirector = u.open(req)
- if self.debug:
- _moduleLogger.info("%r - %r" % (req.get_method(), url))
- _moduleLogger.info("%r - %r" % (openerdirector.code, openerdirector.msg))
- _moduleLogger.info("%r" % (openerdirector.headers))
- self._cookies.extract_cookies(openerdirector, req)
- if only_head:
- return openerdirector
-
- return self._read(openerdirector, trycount)
- except urllib2.URLError, e:
- _moduleLogger.debug("%s: %s" % (e, url))
- cnt += 1
- if (-1 < trycount) and (trycount < cnt):
- raise
-
- # Retry :-)
- _moduleLogger.debug("MozillaEmulator: urllib2.URLError, retrying %d" % cnt)
-
- def _build_opener(self, url, postdata = None, extraheaders = None, forbidRedirect = False):
- if extraheaders is None:
- extraheaders = {}
-
- txheaders = {
- 'Accept': 'text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png',
- 'Accept-Language': 'en,en-us;q=0.5',
- 'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
- 'User-Agent': self.USER_AGENT,
- }
- for key, value in extraheaders.iteritems():
- txheaders[key] = value
- req = urllib2.Request(url, postdata, txheaders)
- self._cookies.add_cookie_header(req)
- if forbidRedirect:
- redirector = HTTPNoRedirector()
- #_moduleLogger.info("Redirection disabled")
- else:
- redirector = urllib2.HTTPRedirectHandler()
- #_moduleLogger.info("Redirection enabled")
-
- http_handler = urllib2.HTTPHandler(debuglevel=self.debug)
- https_handler = urllib2.HTTPSHandler(debuglevel=self.debug)
-
- u = urllib2.build_opener(
- http_handler,
- https_handler,
- urllib2.HTTPCookieProcessor(self._cookies),
- redirector
- )
- if not postdata is None:
- req.add_data(postdata)
- return (req, u)
-
- def _read(self, openerdirector, trycount):
- chunks = []
-
- chunk = openerdirector.read()
- chunks.append(chunk)
- #while chunk and cnt < trycount:
- # time.sleep(1)
- # cnt += 1
- # chunk = openerdirector.read()
- # chunks.append(chunk)
-
- data = "".join(chunks)
-
- if "Content-Length" in openerdirector.info():
- assert len(data) == int(openerdirector.info()["Content-Length"]), "The packet header promised %s of data but only was able to read %s of data" % (
- openerdirector.info()["Content-Length"],
- len(data),
- )
-
- return data
-
-
-class HTTPNoRedirector(urllib2.HTTPRedirectHandler):
- """This is a custom http redirect handler that FORBIDS redirection."""
-
- def http_error_302(self, req, fp, code, msg, headers):
- e = urllib2.HTTPError(req.get_full_url(), code, msg, headers, fp)
- if e.code in (301, 302):
- if 'location' in headers:
- newurl = headers.getheaders('location')[0]
- elif 'uri' in headers:
- newurl = headers.getheaders('uri')[0]
- e.newurl = newurl
- _moduleLogger.info("New url: %s" % e.newurl)
- raise e
projects / gc-dialer / blobdiff