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- # Source Generated with Decompyle++
- # File: in.pyc (Python 2.6)
-
- """Provides HTTP functions for gdata.service to use on Google App Engine
-
- AppEngineHttpClient: Provides an HTTP request method which uses App Engine's
- urlfetch API. Set the http_client member of a GDataService object to an
- instance of an AppEngineHttpClient to allow the gdata library to run on
- Google App Engine.
-
- run_on_appengine: Function which will modify an existing GDataService object
- to allow it to run on App Engine. It works by creating a new instance of
- the AppEngineHttpClient and replacing the GDataService object's
- http_client.
-
- HttpRequest: Function that wraps google.appengine.api.urlfetch.Fetch in a
- common interface which is used by gdata.service.GDataService. In other
- words, this module can be used as the gdata service request handler so
- that all HTTP requests will be performed by the hosting Google App Engine
- server.
- """
- __author__ = 'api.jscudder (Jeff Scudder)'
- import StringIO
- import atom.service as atom
- import atom.http_interface as atom
- from google.appengine.api import urlfetch
-
- def run_on_appengine(gdata_service):
- '''Modifies a GDataService object to allow it to run on App Engine.
-
- Args:
- gdata_service: An instance of AtomService, GDataService, or any
- of their subclasses which has an http_client member.
- '''
- gdata_service.http_client = AppEngineHttpClient()
-
-
- class AppEngineHttpClient(atom.http_interface.GenericHttpClient):
-
- def __init__(self, headers = None):
- self.debug = False
- if not headers:
- pass
- self.headers = { }
-
-
- def request(self, operation, url, data = None, headers = None):
- """Performs an HTTP call to the server, supports GET, POST, PUT, and
- DELETE.
-
- Usage example, perform and HTTP GET on http://www.google.com/:
- import atom.http
- client = atom.http.HttpClient()
- http_response = client.request('GET', 'http://www.google.com/')
-
- Args:
- operation: str The HTTP operation to be performed. This is usually one
- of 'GET', 'POST', 'PUT', or 'DELETE'
- data: filestream, list of parts, or other object which can be converted
- to a string. Should be set to None when performing a GET or DELETE.
- If data is a file-like object which can be read, this method will
- read a chunk of 100K bytes at a time and send them.
- If the data is a list of parts to be sent, each part will be
- evaluated and sent.
- url: The full URL to which the request should be sent. Can be a string
- or atom.url.Url.
- headers: dict of strings. HTTP headers which should be sent
- in the request.
- """
- all_headers = self.headers.copy()
- if headers:
- all_headers.update(headers)
-
- data_str = data
- if data:
- if isinstance(data, list):
- converted_parts = [ _AppEngineHttpClient__ConvertDataPart(x) for x in data ]
- data_str = ''.join(converted_parts)
- else:
- data_str = _AppEngineHttpClient__ConvertDataPart(data)
-
- if data and 'Content-Length' not in all_headers:
- all_headers['Content-Length'] = len(data_str)
-
- if 'Content-Type' not in all_headers:
- all_headers['Content-Type'] = 'application/atom+xml'
-
- if operation == 'GET':
- method = urlfetch.GET
- elif operation == 'POST':
- method = urlfetch.POST
- elif operation == 'PUT':
- method = urlfetch.PUT
- elif operation == 'DELETE':
- method = urlfetch.DELETE
- else:
- method = None
- return HttpResponse(urlfetch.Fetch(url = str(url), payload = data_str, method = method, headers = all_headers))
-
-
-
- def HttpRequest(service, operation, data, uri, extra_headers = None, url_params = None, escape_params = True, content_type = 'application/atom+xml'):
- """Performs an HTTP call to the server, supports GET, POST, PUT, and DELETE.
-
- This function is deprecated, use AppEngineHttpClient.request instead.
-
- To use this module with gdata.service, you can set this module to be the
- http_request_handler so that HTTP requests use Google App Engine's urlfetch.
- import gdata.service
- import gdata.urlfetch
- gdata.service.http_request_handler = gdata.urlfetch
-
- Args:
- service: atom.AtomService object which contains some of the parameters
- needed to make the request. The following members are used to
- construct the HTTP call: server (str), additional_headers (dict),
- port (int), and ssl (bool).
- operation: str The HTTP operation to be performed. This is usually one of
- 'GET', 'POST', 'PUT', or 'DELETE'
- data: filestream, list of parts, or other object which can be
- converted to a string.
- Should be set to None when performing a GET or PUT.
- If data is a file-like object which can be read, this method will read
- a chunk of 100K bytes at a time and send them.
- If the data is a list of parts to be sent, each part will be evaluated
- and sent.
- uri: The beginning of the URL to which the request should be sent.
- Examples: '/', '/base/feeds/snippets',
- '/m8/feeds/contacts/default/base'
- extra_headers: dict of strings. HTTP headers which should be sent
- in the request. These headers are in addition to those stored in
- service.additional_headers.
- url_params: dict of strings. Key value pairs to be added to the URL as
- URL parameters. For example {'foo':'bar', 'test':'param'} will
- become ?foo=bar&test=param.
- escape_params: bool default True. If true, the keys and values in
- url_params will be URL escaped when the form is constructed
- (Special characters converted to %XX form.)
- content_type: str The MIME type for the data being sent. Defaults to
- 'application/atom+xml', this is only used if data is set.
- """
- full_uri = atom.service.BuildUri(uri, url_params, escape_params)
- (server, port, ssl, partial_uri) = atom.service.ProcessUrl(service, full_uri)
- if ssl:
- full_url = 'https://%s%s' % (server, partial_uri)
- else:
- full_url = 'http://%s%s' % (server, partial_uri)
- data_str = data
- if data:
- if isinstance(data, list):
- converted_parts = [ __ConvertDataPart(x) for x in data ]
- data_str = ''.join(converted_parts)
- else:
- data_str = __ConvertDataPart(data)
-
- headers = { }
- if isinstance(service.additional_headers, dict):
- headers = service.additional_headers.copy()
-
- if isinstance(extra_headers, dict):
- for header, value in extra_headers.iteritems():
- headers[header] = value
-
-
- if content_type:
- headers['Content-Type'] = content_type
-
- if operation == 'GET':
- method = urlfetch.GET
- elif operation == 'POST':
- method = urlfetch.POST
- elif operation == 'PUT':
- method = urlfetch.PUT
- elif operation == 'DELETE':
- method = urlfetch.DELETE
- else:
- method = None
- return HttpResponse(urlfetch.Fetch(url = full_url, payload = data_str, method = method, headers = headers))
-
-
- def __ConvertDataPart(data):
- if not data or isinstance(data, str):
- return data
- if hasattr(data, 'read'):
- return data.read()
- return str(data)
-
-
- class HttpResponse(object):
- '''Translates a urlfetch resoinse to look like an hhtplib resoinse.
-
- Used to allow the resoinse from HttpRequest to be usable by gdata.service
- methods.
- '''
-
- def __init__(self, urlfetch_response):
- self.body = StringIO.StringIO(urlfetch_response.content)
- self.headers = urlfetch_response.headers
- self.status = urlfetch_response.status_code
- self.reason = ''
-
-
- def read(self, length = None):
- if not length:
- return self.body.read()
- return self.body.read(length)
-
-
- def getheader(self, name):
- if not self.headers.has_key(name):
- return self.headers[name.lower()]
- return self.headers[name]
-
-
-