您的示例中没有标题和参数，因此我不知道它们如何显示。但是您可以使用以下代码来匹配示例字符串：
[EDIT1-根据OP的新示例URI添加了正则表达式以匹配主机名字符串和对user：password的支持]
[EDIT2-添加了参数和标头正则表达式，并在正则表达式的“或”部分添加了更多注释]
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
试试看，看看是否适合您
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