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The fetch()
function makes a synchronous request to fetch a URL. This function is provided by the google.appengine.api.urlfetch
package.
See also Asychronous Requests.
Fetches a document at the URL given in url, and returns an object containing the details of the response. See Response Objects for details about the return value.
The fetch action is synchronous. fetch() will not return until the server responds. A slow remote server may cause your application's own request to time out.
Arguments:
http
or https
URL. If the URL is invalid, a InvalidURLError is raised.POST
or PUT
request.GET
, POST
, HEAD
, PUT
, and DELETE
. These values are constants provided by the package. The value can also be a string equivalent to the name of the method.False
and the response data exceeds the maximum allowed response size, a ResponseTooLargeError exception is raised. If True
, no exception is raised, and the response's content
is truncated to the maximum size, and the response object's content_was_truncated
attribute is set to True
. For more information on limits, see the URL Fetch Service overview.If True
, responses that are HTTP redirects are followed, up to 5 consecutive redirects. The response data is from the final location, as if the data were for the requested location. If False
, redirects are not followed, and a redirect response is returned directly to the application, including the header information that describes the redirect.
Warning: Cookies are not handled upon redirection. If cookie handling is needed, set follow_redirects to False
and handle both cookies and redirects manually.
The maximum amount of time to wait for a response from the remote host, as a number of seconds. If the remote host does not respond in this amount of time, a DownloadError is raised.
Time spent waiting for a request does not count toward the CPU quota for the request. It does count toward the request timer. If the app request timer expires before the URL Fetch call returns, the call is canceled.
The deadline can be up to a maximum of 60 seconds for request handlers and 10 minutes for tasks queue and cron job handlers. If deadline is None
, the deadline is set to 5 seconds.
A value of True
instructs the application to send a request to the server only if the certificate is valid and signed by a trusted CA, and also includes a hostname that matches the certificate. A value of False
instructs the application to perform no certificate validation. A value of None
defaults to the underlying implementation of URL Fetch. The underlying implementation currently defaults to False
, but will default to True
in the near future.