mirror of
https://github.com/mightyBroccoli/xmpp-chatbot.git
synced 2024-11-13 22:06:49 +01:00
113 lines
3.4 KiB
Python
113 lines
3.4 KiB
Python
# -*- coding: utf-8 -*-
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import os
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import requests
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import defusedxml.ElementTree as Et
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class XEPRequest:
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"""
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class which requests the header of the referenced xep
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"""
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def __init__(self):
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# init all necessary variables
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self.reqxep, self.opt_arg = None, None
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self.xeplist = None
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self.acceptedxeps = list()
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def req_xeplist(self):
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"""
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query and save the current xep list to reduce network bandwidth
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"""
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# check if etag header is present if not set local_etag to ""
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if os.path.isfile("./common/.etag"):
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with open("./common/.etag") as file:
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local_etag = file.read()
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else:
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local_etag = ""
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with requests.Session() as s:
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# head request the xeplist.xml
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s.headers.update({'Accept': 'application/xml'})
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head = s.head("https://xmpp.org/extensions/xeplist.xml")
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etag = head.headers['etag']
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# compare etag with local_etag if they match up no request is made
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if local_etag == etag:
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with open("./common/xeplist.xml", "r") as file:
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self.xeplist = Et.fromstring(file.read())
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# if the connection is not possible use cached xml if present
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elif os.path.isfile("./common/xeplist.xml") and head.status_code != 200:
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with open("./common/xeplist.xml", "r") as file:
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self.xeplist = Et.fromstring(file.read())
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# in any other case request the latest xml
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else:
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r = s.get("https://xmpp.org/extensions/xeplist.xml")
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r.encoding = 'utf-8'
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local_etag = head.headers['etag']
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with open("./common/xeplist.xml", "w") as file:
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file.write(r.content.decode())
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self.xeplist = Et.fromstring(r.content.decode())
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with open('./common/.etag', 'w') as string:
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string.write(local_etag)
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# populate xep comparison list
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for xep in self.xeplist.findall(".//*[@accepted='true']/number"):
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self.acceptedxeps.append(xep.text)
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def get(self):
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"""
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function to query the xep entry if xepnumber is present in xeplist
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:return: formatted xep header information
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"""
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# all possible subtags grouped by location
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last_revision_tags = ["date", "version", "initials", "remark"]
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xep_tags = ["number", "title", "abstract", "type", "status", "approver", "shortname", "sig", "lastcall"]
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# check if xeplist is accurate
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self.req_xeplist()
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result = list()
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# if requested number is member of acceptedxeps continue
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if str(self.reqxep) in self.acceptedxeps:
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searchstring = ".//*[@accepted='true']/[number='%s']" % self.reqxep
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for item in self.xeplist.findall(searchstring):
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# if the opt_arg references is member of xeptag return only that tag
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if self.opt_arg in xep_tags:
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query = item.find(self.opt_arg)
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result.append("%s : %s" % (query.tag, query.text))
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# if the opt_arg references is member of last-revision_tags return only that tag
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elif self.opt_arg in last_revision_tags:
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query = item.find("last-revision").find(self.opt_arg)
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result.append("%s : %s" % (query.tag, query.text))
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# in any other case return the general answer
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else:
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result_opts = ["title", "type", "abstract", "status"]
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for tag in result_opts:
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result.append(item.find(tag).text)
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# if the requested number is no member of acceptedxeps and/or not accepted return error.
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else:
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result.append("XEP-%s : is not available." % self.reqxep)
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return result
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def format(self, query, target, opt_arg):
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"""
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:param target: number int or str to request the xep for
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:return:
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"""
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self.reqxep = int(target)
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self.opt_arg = opt_arg
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reply = self.get()
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text = '\n'.join(reply)
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return text
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