SIP URI变量的Python正则表达式? [英] Python Regular Expression for SIP URI variables?
问题描述
我将这个正则表达式用于SIP(会话初始化协议)URI，以提取不同的内部变量.
I am using this regular expression for SIP (Session Initiation Protocol) URIs to extract the different internal variables.
_syntax = re.compile('^(?P<scheme>[a-zA-Z][a-zA-Z0-9\+\-\.]*):' # scheme
+ '(?:(?:(?P<user>[a-zA-Z0-9\-\_\.\!\~\*\'\(\)&=\+\$,;\?\/\%]+)' # user
+ '(?::(?P<password>[^:@;\?]+))?)@)?' # password
+ '(?:(?:(?P<host>[^;\?:]*)(?::(?P<port>[\d]+))?))' # host, port
+ '(?:;(?P<params>[^\?]*))?' # parameters
+ '(?:\?(?P<headers>.*))?$') # headers
m = URI._syntax.match(value)
if m:
self.scheme, self.user, self.password, self.host, self.port, params, headers = m.groups()
我需要修改此表达式以支持IPv6并匹配所有不同类型的SIP URI.基本思想是IPv4显示的格式为192.168.0.1和IPv6 2620:0:2ef0:7070:250:60ff:fe03:32b7.因为端口号在:之后，所以IPv6在SIP URI的中间.
I need to modify this expression to support IPv6 and match all the different types of SIP URIs. The basic idea is that IPv4 shows the form 192.168.0.1 and IPv6 2620:0:2ef0:7070:250:60ff:fe03:32b7. Beacause the port number is after :, the IPv6 is between brakets in the SIP URI.
它的一般形式是:
sip:user:password @ host:port; uri-parameters?headers
sip:user:password@host:port;uri-parameters?headers
这些是一些示例:
uriList = [
'sip:192.1.2.3',
'sip:123@192.1.2.3',
'sip:192.1.2.3:5060',
'sips:123@[2620:0:2ef0:7070:250:60ff:fe03:32b7]',
'sip:[2620:0:2ef0:7070:250:60ff:fe03:32b7]',
'sip:[2620:0:2ef0:7070:250:60ff:fe03:32b7]:5060',
'sips:support@voip.example.com',
'sip:22444032@voip.example.com:6000',
'sip:thks.ashwin:pass@212.123.1.213',
]
输出
Scheme: sip, User: , Host: 192.1.2.3, Port:
Scheme: sip, User: 123, Host: 192.1.2.3, Port:
Scheme: sip, User: , Host: 192.1.2.3, Port: 5060
Scheme: sips, User: 123, Host: 2620:0:2ef0:7070:250:60ff:fe03:32b7, Port:
Scheme: sip, User: , Host: 2620:0:2ef0:7070:250:60ff:fe03:32b7, Port:
Scheme: sip, User: , Host: 2620:0:2ef0:7070:250:60ff:fe03:32b7, Port: 5060
Scheme: sips, User:support , Host: voip.example.com
Scheme: sip, User:22444032 , Host: voip.example.com, Port: 6000
Scheme: sip, User:thks.ashwin, Password:pass ,Host: 212.123.1.213
我试图修改主机表达式以匹配[IPv6]和IPv4表达式，但是没有运气=´(
I tried to modify the host expression to match both [IPv6] and IPv4 expression but without luck =´(
我一直在使用 https://pythex.org/来测试结果.
I've been using https://pythex.org/ to test the results.
推荐答案
您的示例中没有标题和参数，因此我不知道它们的显示方式.但是您可以使用以下代码来匹配示例字符串:
There are no headers and params in your example, so I dont know how they show up. But you can use the following code to match your example strings:
import re
uriList = [
'sip:192.1.2.3',
'sip:123@192.1.2.3',
'sip:192.1.2.3:5060',
'sip:123@[2620:0:2ef0:7070:250:60ff:fe03:32b7]',
'sip:[2620:0:2ef0:7070:250:60ff:fe03:32b7]',
'sip:[2620:0:2ef0:7070:250:60ff:fe03:32b7]:5060',
'sips:support@voip.example.com',
'sip:22444032@voip.example.com:6000',
'sip:support:pass@212.123.1.213',
'sip:support:pass@212.123.1.213;urlparams=test',
'sip:support:pass@212.123.1.213?auth=basic',
'sip:support:pass@212.123.1.213;urlparams=test?auth=basic',
]
mPattern = re.compile(
'(?P<scheme>\w+):' #Scheme
+'(?:(?P<user>[\w\.]+):?(?P<password>[\w\.]+)?@)?' #User:Password
+'\[?(?P<host>' #Begin group host
+'(?:\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})|' #IPv4 address Host Or
+'(?:(?:[0-9a-fA-F]{1,4}):){7}[0-9a-fA-F]{1,4}|' #IPv6 address Host Or
+'(?:(?:[0-9A-Za-z]+\.)+[0-9A-Za-z]+)'#Hostname string
+')\]?:?' #End group host
+'(?P<port>\d{1,6})?' #port
+'(?:\;(?P<params>[^\?]*))?' # parameters
+'(?:\?(?P<headers>.*))?' # headers
)
groupNamesList = ['scheme', 'user', 'password', 'host', 'port', 'params', 'headers'] #List of group Names
for uri in uriList: #iterate through the list of uri
mObject = mPattern.search(uri) #pattern search
if mObject: #if you find a match
groupStrings = [mObject.group(groupName) if mObject.group(groupName) else '' for groupName in groupNamesList] #extract your groupStrings
print('Scheme: {0}, User: {1}, Password: {2}, Host: {3}, Port: {4}, Params: {5}, Headers: {6}'.format(*groupStrings)) #print groupStrings
我得到的输出:
Scheme: sip, User: , Password: , Host: 192.1.2.3, Port: , Params: , Headers:
Scheme: sip, User: 123, Password: , Host: 192.1.2.3, Port: , Params: , Headers:
Scheme: sip, User: , Password: , Host: 192.1.2.3, Port: 5060, Params: , Headers:
Scheme: sip, User: 123, Password: , Host: 2620:0:2ef0:7070:250:60ff:fe03:32b7, Port: , Params: , Headers:
Scheme: sip, User: , Password: , Host: 2620:0:2ef0:7070:250:60ff:fe03:32b7, Port: , Params: , Headers:
Scheme: sip, User: , Password: , Host: 2620:0:2ef0:7070:250:60ff:fe03:32b7, Port: 5060, Params: , Headers:
Scheme: sips, User: support, Password: , Host: voip.example.com, Port: , Params: , Headers:
Scheme: sip, User: 22444032, Password: , Host: voip.example.com, Port: 6000, Params: , Headers:
Scheme: sip, User: support, Password: pass, Host: 212.123.1.213, Port: , Params: , Headers:
Scheme: sip, User: support, Password: pass, Host: 212.123.1.213, Port: , Params: urlparams=test, Headers:
Scheme: sip, User: support, Password: pass, Host: 212.123.1.213, Port: , Params: , Headers: auth=basic
Scheme: sip, User: support, Password: pass, Host: 212.123.1.213, Port: , Params: urlparams=test, Headers: auth=basic
尝试一下，看看它是否对您有用
Try this out and see if it works for you
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