Python记录wsgi

类实现wsgi app

from wsgiref.util import setup_testing_defaults
from wsgiref.simple_server import make_server

class Simple_App:
    def __init__(self,environ,start_response):
        self.environ = environ
        self.start_response =start_response
        status = '200 ok'
        headers = [('Content-type','text/plain;charset=utf-8')]
        self.start_response(status,headers)
        self.ret = ['{}'.format(v).encode() for k,v in self.environ.items()]
    def __iter__(self):
        yield from self.ret

with  make_server('0.0.0.0',9000,Simple_App) as httpd:
    httpd.serve_forever()

函数实现wsgi，app的方法

from wsgiref.simple_server import make_server

def simple_app(environ, start_response):
    status = '200 OK'
    headers = [('Content-type', 'text/plain; charset=utf-8')]
    qstr = environ.get('QUERY_STRING')
    # if qstr:
    #     for pair in qstr.split('&'):
    #         k,_,v = pair.partition("=")
    #         print('k={},v={}'.format(k,v))
    if qstr:
        querydict={k:v for k,_,v in map(lambda x:x.partition("="),qstr.split("&"))}
        print(querydict)
    start_response(status, headers)

    ret = [("%s: %s\n" % (key, value)).encode("utf-8")
           for key, value in environ.items()]
    return ret  #返回一个可迭代对象，正文就是这个列表的元素

with make_server('', 8000, simple_app) as httpd:
    print("Serving on port 8000...")
    print("")
    httpd.serve_forever()

理解webob的Request，Response

from webob import Request,Response
from wsgiref.simple_server import make_server
def simple_server(environ,start_response):
    request = Request(environ)

    print(request.params)
    response = Response()

    response.body = b'<h1>hello world<\h1>'
    return response(environ,start_response)

with make_server('0.0.0.0',9999,simple_server) as httpd:
    httpd.serve_forever()

wsgify装饰器的实现

from webob import Request,Response
from wsgiref.simple_server import make_server
from webob.dec import wsgify

@wsgify
def app(request:Request)->Response: #一个请求对应一个响应
    return Response('<h1>welcome to China</h1>')
　　#返回值会被封装成webob.response类型实例的body属性
    # return Response(b'<h2>welcome to China 2 </h2>')
    # return b'<h3>welcome to China 3</h3>'

with make_server('0.0.0.0',9999,app) as httpd:
    print('success')
    httpd.serve_forever()

wsgi路由实现

from webob import Response,Request
from webob.dec import wsgify
from wsgiref.simple_server import make_server
from webob.exc import HTTPNotFound
import re

class Router:
    def __init__(self,prefix:str=''):
        self.__prefix = prefix
        self.routeable = []  #[(method,pattern,handler)]

    def route(self,pattern,*method):  #method is None instead of all of method
        def wrapper(handler):
            self.routeable.append((tuple(map(lambda x:x.upper(),method)),re.compile(pattern),handler))
            return handler
        return wrapper
    def get(self,pattern):
        return self.route(pattern,'GET')
    def post(self,pattern):
        return self.route(pattern,'POST')
    def head(self,pattern):
        self.route(pattern,'HEAD')
    def match(self,request): #receive browser requset
        if not request.path.startswith(self.__prefix):
            return
        for method,pattern,handler in self.routeable:
            if request.method in method or not method:
                matcher = pattern.match(request.path.replace(self.__prefix,'',1))
                if matcher:
                    request.groupdict = matcher.groupdict()
                    return handler(request)

class App:
    _Routers = []
    @classmethod
    def regesiter(cls, *routers):
        for router in routers:
            cls._Routers.append(router)
    @wsgify
    def __call__(self, request:Request):
        for i in self._Routers:
            result = i.match(request)
            if result:
                return result
        raise HTTPNotFound('this goes out to homepage')

root = Router()
python = Router('/python')  #实例设设置了url的前缀
App.regesiter(root,python)

@root.get('^/(?P<id>\d+)')
@root.get('^/$')
def roothandler(request:Request):
    return Response("<h1>Welcome to roothandler</h1>")

@python.get('^/(\w+)')#/python/aa 判断aas是否匹配上url，/python在代码中被替换掉成空
def pythonhandler(request:Request):
    return Response('<h1>Welcome to pythonhandler</h1>')

if __name__ == '__main__':
    with make_server('0.0.0.0',9999,App()) as httpd:
        httpd.serve_forever()

wsgi更改路由限定方式

from webob import Response,Request
from webob.dec import wsgify
from wsgiref.simple_server import make_server
from webob.exc import HTTPNotFound
import re

class Router:
    __regex = re.compile(r'/{([^{}:]+):?([^{}:]*)}')
    TYPEPATTERNS = {
        'str': r'[^/]+',
        'word': r'\w+',
        'int': r'[+-]?\d+',
        'float': r'[+-]?\d+.\d+',
        'any': r'.+'
    }
    def _repl(self, matcher):
        return '/(?P<{}>{})'.format(matcher.group(1), self.TYPEPATTERNS.get(matcher.group(2), self.TYPEPATTERNS['str']))

    def __parse(self,src):
        return self.__regex.sub(self._repl,src)

    def __init__(self,prefix:str=''):
        self.__prefix = prefix
        self.routeable = []  #[(method,pattern,handler)]

    def route(self,pattern,*method):  #method is None instead of all of method
        def wrapper(handler):
            self.routeable.append((tuple(map(lambda x:x.upper(),method)),re.compile(self.__parse(pattern)),handler))
            return handler
        return wrapper
    def get(self,pattern):
        return self.route(pattern,'GET')
    def post(self,pattern):
        return self.route(pattern,'POST')
    def head(self,pattern):
        self.route(pattern,'HEAD')
    def match(self,request): #receive browser requset
        if not request.path.startswith(self.__prefix):
            return
        for method,pattern,handler in self.routeable:
            if request.method in method or not method:
                matcher = pattern.match(request.path.replace(self.__prefix,'',1))
                if matcher:
                    request.groupdict = matcher.groupdict()
                    return handler(request)

class App:
    _Routers = []
    @classmethod
    def regesiter(cls, *routers):
        for router in routers:
            cls._Routers.append(router)
    @wsgify
    def __call__(self, request:Request):
        for i in self._Routers:
            result = i.match(request)
            if result:
                return result
        raise HTTPNotFound('this goes out to homepage')

root = Router()
python = Router('/python')  #实例设设置了url的前缀
App.regesiter(root,python)

# @root.get('^/(?P<id>\d+)')
@root.get('^/$')
@root.get(r'^/{id:int}$')
def roothandler(request:Request):
    return Response("<h1>Welcome to roothandler</h1>")

# @python.get('^/(\w+)')#/python/aa 判断aas是否匹配上url，/python在代码中被替换掉成空
@python.get('^/{id}')
def pythonhandler(request:Request):
    return Response('<h1>Welcome to pythonhandler</h1>')

if __name__ == '__main__':
    with make_server('0.0.0.0',9999,App()) as httpd:
        httpd.serve_forever()

重写sub

from webob import Response,Request
from webob.dec import wsgify
from wsgiref.simple_server import make_server
from webob.exc import HTTPNotFound
import re

class Router:
    __regex = re.compile(r'/{([^{}:]+):?([^{}:]*)}')
    TYPEPATTERNS = {
        'str': r'[^/]+',
        'word': r'\w+',
        'int': r'[+-]?\d+',
        'float': r'[+-]?\d+.\d+',
        'any': r'.+'
    }

    TYPECAST = {
        'str': str,
        'word': str,
        'int': int,
        'float': float,
        'any': str
    }

    def __parse(self,src: str): #src = {id:int}
        start = 0
        repl = ''
        types = {}
        matchers = self.__regex.finditer(src)
        for i, matcher in enumerate(matchers):
            name = matcher.group(1)
            t = matcher.group(2)
            types[name] = self.TYPECAST.get(matcher.group(2), str)
            repl += src[start:matcher.start()]
            tmp = '/(?P<{}>{})'.format(matcher.group(1), self.TYPEATTERNS.get(matcher.group(2), self.TYPEATTERNS['str']))
            start = matcher.end()
        else:
            repl += src[start:]
        return repl, types #(r'[^/]+',{id：int})

    def __init__(self,prefix:str=''):
        self.__prefix = prefix
        self.routeable = []  #[(method,pattern,handler)]

    def route(self,rule,*method):  #method is None instead of all of method
        def wrapper(handler):
            pattern,trans = self.__parse(rule)
            self.routeable.append((tuple(map(lambda x:x.upper(),method)),re.compile(pattern),trans,handler))
            return handler
        return wrapper
    def get(self,pattern):
        return self.route(pattern,'GET')
    def post(self,pattern):
        return self.route(pattern,'POST')
    def head(self,pattern):
        self.route(pattern,'HEAD')
    def match(self,request): #receive browser requset
        if not request.path.startswith(self.__prefix):
            return
        for method,pattern,trans,handler in self.routeable:
            if request.method in method or not method:
                matcher = pattern.match(request.path.replace(self.__prefix,'',1))  #/python/111  ;mathc(111)
                if matcher:#{id:111}
                    newdict = {}
                    for k,v in matcher.groupdict.items():
                        newdict[k] = trans[k](v)
                        request.groupdict = matcher.groupdict()
                    return handler(request)

class App:
    _Routers = []
    @classmethod
    def regesiter(cls, *routers):
        for router in routers:
            cls._Routers.append(router)
    @wsgify
    def __call__(self, request:Request):
        for i in self._Routers:
            result = i.match(request)
            if result:
                return result
        raise HTTPNotFound('this goes out to homepage')

root = Router()
python = Router('/python')  #实例设设置了url的前缀
App.regesiter(root,python)

# @root.get('^/(?P<id>\d+)')
@root.get('^/$')
@root.get(r'^/{id:int}$')
def roothandler(request:Request):
    return Response("<h1>Welcome to roothandler</h1>")

# @python.get('^/(\w+)')#/python/aa 判断aas是否匹配上url，/python在代码中被替换掉成空
@python.get('^/{id}')
def pythonhandler(request:Request):
    return Response('<h1>Welcome to pythonhandler</h1>')

if __name__ == '__main__':
    with make_server('0.0.0.0',9999,App()) as httpd:
        httpd.serve_forever()