--- /dev/null
+import collections
+import http.cookies
+import json
+import urllib.parse
+
+_Request = collections.namedtuple(
+ 'Request',
+ (
+ 'env',
+ 'GET',
+ 'accept',
+ 'accept_encoding',
+ 'accept_language',
+ 'content',
+ 'content_length',
+ 'content_type',
+ 'cookie',
+ 'method',
+ 'path',
+ 'parameters',
+ 'query',
+ 'user_agent',
+ )
+)
+
+class Request(_Request):
+ def __new__(cls, env):
+ errors = []
+
+ accept = env.get('HTTP_ACCEPT')
+ accept_encoding = env.get('HTTP_ACCEPT_ENCODING')
+ accept_language = env.get('HTTP_ACCEPT_LANGUAGE')
+ content = env.get('CONTENT', '')
+ content_type = env.get('CONTENT_TYPE')
+ method = env.get('REQUEST_METHOD')
+ path = env.get('PATH_INFO')
+ query = env.get('QUERY_STRING')
+ user_agent = env.get('HTTP_USER_AGENT')
+
+ content_length = env.get('CONTENT_LENGTH')
+
+ if content_length == '' or content_length is None:
+ content_length = 0
+ else:
+ try:
+ content_length = int(content_length)
+ except ValueError:
+ errors.append('Unable to parse Content-Length "{}"'.format(content_length))
+ content_length = 0
+
+ try:
+ cookie = http.cookies.SimpleCookie(env.get('HTTP_COOKIE'))
+ except:
+ cookie = http.cookies.SimpleCookie()
+
+
+ try:
+ GET = urllib.parse.parse_qs(query)
+ except:
+ GET = {}
+ errors.append('Unable to parse GET parameters from query string "{}"'.format(query))
+
+ if method == 'GET':
+ parameters = GET
+
+ result = super().__new__(
+ cls,
+ env=env,
+ GET=GET,
+ accept=accept,
+ accept_encoding=accept_encoding,
+ accept_language=accept_language,
+ content = content,
+ content_length = content_length,
+ content_type = content_type,
+ cookie=cookie,
+ method=method,
+ parameters=parameters,
+ path=path,
+ query=query,
+ user_agent=user_agent,
+ )
+
+ result.subpath = path
+ return result
+
+_Response = collections.namedtuple(
+ 'Response',
+ (
+ 'status',
+ 'content_type',
+ 'extra_headers',
+ 'content',
+ ),
+)
+
+class Response(_Response):
+ def __new__(cls, content, **kwargs):
+ status = kwargs.pop('status', 200)
+ assert isinstance(status, int)
+
+ content_type = kwargs.pop('content_type')
+ assert isinstance(content_type, str)
+
+ extra_headers = kwargs.pop('extra_headers', ())
+ assert isinstance(extra_headers, tuple)
+
+ assert len(kwargs) == 0
+
+ return super().__new__(
+ cls,
+ status=status,
+ content_type=content_type,
+ extra_headers=extra_headers,
+ content=content,
+ )
+
+ @property
+ def headers(self):
+ return (
+ ('Content-Type', self.content_type),
+ )
+
+class HTMLResponse(Response):
+ def __new__(cls, content, **kwargs):
+ assert 'content_type' not in kwargs
+
+ return super().__new__(
+ cls,
+ content,
+ content_type='text/html',
+ **kwargs,
+ )
+
+class JSONResponse(Response):
+ def __new__(cls, content_json, **kwargs):
+ assert 'content_type' not in kwargs
+ assert 'content' not in kwargs
+
+ self = super().__new__(
+ cls,
+ content=json.dumps(content_json),
+ content_type='application/json',
+ **kwargs,
+ )
+ self.content_json = content_json
+ return self
+
+class TextResponse(Response):
+ def __new__(cls, content, **kwargs):
+ assert 'content_type' not in kwargs
+
+ return super().__new__(
+ cls,
+ content,
+ content_type='text/plain',
+ **kwargs,
+ )
+
+_RedirectResponse = collections.namedtuple(
+ 'RedirectResponse',
+ (
+ 'location',
+ 'permanent',
+ ),
+)
+
+class RedirectResponse(_RedirectResponse):
+ def __new__(cls, location, **kwargs):
+ assert isinstance(location, str)
+
+ permanent = kwargs.pop('permanent', True)
+ assert isinstance(permanent, bool)
+ assert len(kwargs) == 0
+
+ return super().__new__(
+ cls,
+ location=location,
+ permanent=permanent,
+ )
+
+ @property
+ def status(self):
+ return 308 if self.permanent else 307
+
+ @property
+ def headers(self):
+ return (('Location', self.location),)
+
+ @property
+ def content(self):
+ return (b'',)
+
+REQUEST_METHODS = (
+ 'GET',
+ 'HEAD',
+ 'POST',
+ 'PUT',
+ 'PATCH',
+ 'DELETE',
+ 'CONNECT',
+ 'OPTIONS',
+ 'TRACE',
+)
+
+def default_method_not_allowed_handler(request):
+ return Response('')
+
+def default_options_handler(handlers):
+ def handler(request):
+ return Response(','.join(handlers.keys()))
+ return handler
+
+def route_on_method(**kwargs):
+ handlers = {}
+ for method in REQUEST_METHODS:
+ if method in kwargs:
+ handlers[method] = kwargs.pop(method)
+
+ method_not_allowed_handler = kwargs.pop(
+ 'method_not_allowed',
+ default_method_not_allowed_handler,
+ )
+
+ assert len(kwargs) == 0
+
+ if 'OPTIONS' not in handlers:
+ handlers['OPTIONS'] = default_options_handler(handlers)
+
+ def handler(request):
+ return handlers.get(
+ request.method.upper(),
+ method_not_allowed_handler,
+ )(request)
+
+ return handler
+
+def _get_status(response):
+ return {
+ 200: '200 OK',
+ 307: '307 Temporary Redirect',
+ 308: '308 Permanent Redirect',
+ }[response.status]
+
+def _get_headers(response):
+ return list(response.headers)
+
+def _get_content(response):
+ content = response.content
+
+ if isinstance(content, bytes):
+ return (content,)
+
+ if isinstance(content, str):
+ return (content.encode('utf-8'),)
+
+ return content
+
+def App(handler):
+ def app(env, start_fn):
+ response = handler(Request(env))
+
+ start_fn(_get_status(response), _get_headers(response))
+ return _get_content(response)
+ return app
projects / fwx / blobdiff