223 lines
6.4 KiB
Python
223 lines
6.4 KiB
Python
# coding=utf-8
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# Nemubot is a smart and modulable IM bot.
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# Copyright (C) 2012-2015 Mercier Pierre-Olivier
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from urllib.parse import urlparse
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from nemubot.exception import IRCException
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def isURL(url):
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"""Return True if the URL can be parsed"""
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o = urlparse(url)
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return o.scheme == "" and o.netloc == "" and o.path == ""
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def getScheme(url):
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"""Return the protocol of a given URL"""
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o = urlparse(url)
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return o.scheme
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def getHost(url):
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"""Return the domain of a given URL"""
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return urlparse(url).hostname
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def getPort(url):
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"""Return the port of a given URL"""
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return urlparse(url).port
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def getPath(url):
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"""Return the page request of a given URL"""
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return urlparse(url).path
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def getUser(url):
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"""Return the page request of a given URL"""
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return urlparse(url).username
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def getPassword(url):
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"""Return the page request of a given URL"""
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return urlparse(url).password
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# Get real pages
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def getURLContent(url, body=None, timeout=7):
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"""Return page content corresponding to URL or None if any error occurs
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Arguments:
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url -- the URL to get
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body -- Data to send as POST content
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timeout -- maximum number of seconds to wait before returning an exception
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"""
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o = urlparse(url)
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if o.netloc == "":
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o = urlparse("http://" + url)
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import http.client
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kwargs = {
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'host': o.hostname,
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'port': o.port,
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'timeout': timeout
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}
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if o.scheme == "http":
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conn = http.client.HTTPConnection(**kwargs)
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elif o.scheme == "https":
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# For Python>3.4, restore the Python 3.3 behavior
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import ssl
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if hasattr(ssl, "create_default_context"):
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kwargs["context"] = ssl.create_default_context()
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kwargs["context"].check_hostname = False
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kwargs["context"].verify_mode = ssl.CERT_NONE
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conn = http.client.HTTPSConnection(**kwargs)
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elif o.scheme is None or o.scheme == "":
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conn = http.client.HTTPConnection(**kwargs)
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else:
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raise IRCException("Invalid URL")
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import socket
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try:
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from nemubot import __version__
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if o.query != '':
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conn.request("GET" if body is None else "POST",
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o.path + "?" + o.query,
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body,
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{"User-agent": "Nemubot v%s" % __version__})
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else:
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conn.request("GET" if body is None else "POST",
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o.path,
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body,
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{"User-agent": "Nemubot v%s" % __version__})
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except OSError as e:
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raise IRCException(e.strerror)
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try:
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res = conn.getresponse()
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size = int(res.getheader("Content-Length", 524288))
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cntype = res.getheader("Content-Type")
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if size > 524288 or (cntype is not None and cntype[:4] != "text" and cntype[:4] != "appl"):
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raise IRCException("Content too large to be retrieved")
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data = res.read(size)
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# Decode content
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charset = "utf-8"
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if cntype is not None:
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lcharset = res.getheader("Content-Type").split(";")
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if len(lcharset) > 1:
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for c in lcharset:
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ch = c.split("=")
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if ch[0].strip().lower() == "charset" and len(ch) > 1:
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cha = ch[1].split(".")
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if len(cha) > 1:
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charset = cha[1]
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else:
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charset = cha[0]
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except http.client.BadStatusLine:
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raise IRCException("Invalid HTTP response")
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finally:
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conn.close()
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if res.status == http.client.OK or res.status == http.client.SEE_OTHER:
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return data.decode(charset).strip()
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elif ((res.status == http.client.FOUND or
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res.status == http.client.MOVED_PERMANENTLY) and
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res.getheader("Location") != url):
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return getURLContent(res.getheader("Location"), timeout=timeout)
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else:
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raise IRCException("A HTTP error occurs: %d - %s" %
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(res.status, http.client.responses[res.status]))
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def getXML(url, timeout=15):
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"""Get content page and return XML parsed content
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Arguments:
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url -- the URL to get
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timeout -- maximum number of seconds to wait before returning an exception
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"""
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cnt = getURLContent(url, timeout=timeout)
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if cnt is None:
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return None
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else:
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from nemubot.tools.xmlparser import parse_string
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return parse_string(cnt.encode())
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def getJSON(url, timeout=15):
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"""Get content page and return JSON content
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Arguments:
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url -- the URL to get
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timeout -- maximum number of seconds to wait before returning an exception
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"""
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import json
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cnt = getURLContent(url, timeout=timeout)
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if cnt is None:
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return None
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else:
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return json.loads(cnt)
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# Other utils
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def htmlentitydecode(s):
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"""Decode htmlentities
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Argument:
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s -- The string to decode
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"""
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import re
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from html.entities import name2codepoint
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return re.sub('&(%s);' % '|'.join(name2codepoint),
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lambda m: chr(name2codepoint[m.group(1)]), s)
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def striphtml(data):
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"""Remove HTML tags from text
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Argument:
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data -- the string to strip
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"""
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if data is None or (not isinstance(data, str) and not isinstance(data, buffer)):
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return data
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import re
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p = re.compile(r'<.*?>')
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r, _ = re.subn(r' +', ' ', htmlentitydecode(p.sub('', data)
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.replace("(", "/(")
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.replace(")", ")/")
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.replace("'", "´")
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.replace(""", "\""))
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.replace('\n', ' '))
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return r
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