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Batches multiple HttpRequest objects into a single HTTP request.
Example:
from googleapiclient.http import BatchHttpRequest
def list_animals(request_id, response, exception):
"""Do something with the animals list response."""
if exception is not None:
# Do something with the exception.
pass
else:
# Do something with the response.
pass
def list_farmers(request_id, response, exception):
"""Do something with the farmers list response."""
if exception is not None:
# Do something with the exception.
pass
else:
# Do something with the response.
pass
service = build('farm', 'v2')
batch = BatchHttpRequest()
batch.add(service.animals().list(), list_animals)
batch.add(service.farmers().list(), list_farmers)
batch.execute(http=http)
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Constructor for a BatchHttpRequest.
Args:
callback: callable, A callback to be called for each response, of the
form callback(id, response, exception). The first parameter is the
request id, and the second is the deserialized response object. The
third is an googleapiclient.errors.HttpError exception object if an HTTP error
occurred while processing the request, or None if no error occurred.
batch_uri: string, URI to send batch requests to.
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Refresh the credentials and apply to the request. Args: request: HttpRequest, the request. http: httplib2.Http, the global http object for the batch. |
Convert an id to a Content-ID header value. Args: id_: string, identifier of individual request. Returns: A Content-ID header with the id_ encoded into it. A UUID is prepended to the value because Content-ID headers are supposed to be universally unique. |
Convert a Content-ID header value to an id. Presumes the Content-ID header conforms to the format that _id_to_header() returns. Args: header: string, Content-ID header value. Returns: The extracted id value. Raises: BatchError if the header is not in the expected format. |
Convert an HttpRequest object into a string. Args: request: HttpRequest, the request to serialize. Returns: The request as a string in application/http format. |
Convert string into httplib2 response and content. Args: payload: string, headers and body as a string. Returns: A pair (resp, content), such as would be returned from httplib2.request. |
Create a new id. Auto incrementing number that avoids conflicts with ids already used. Returns: string, a new unique id. |
Add a new request.
Every callback added will be paired with a unique id, the request_id. That
unique id will be passed back to the callback when the response comes back
from the server. The default behavior is to have the library generate it's
own unique id. If the caller passes in a request_id then they must ensure
uniqueness for each request_id, and if they are not an exception is
raised. Callers should either supply all request_ids or nevery supply a
request id, to avoid such an error.
Args:
request: HttpRequest, Request to add to the batch.
callback: callable, A callback to be called for this response, of the
form callback(id, response, exception). The first parameter is the
request id, and the second is the deserialized response object. The
third is an googleapiclient.errors.HttpError exception object if an HTTP error
occurred while processing the request, or None if no errors occurred.
request_id: string, A unique id for the request. The id will be passed to
the callback with the response.
Returns:
None
Raises:
BatchError if a media request is added to a batch.
KeyError is the request_id is not unique.
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Serialize batch request, send to server, process response.
Args:
http: httplib2.Http, an http object to be used to make the request with.
order: list, list of request ids in the order they were added to the
batch.
request: list, list of request objects to send.
Raises:
httplib2.HttpLib2Error if a transport error has occured.
googleapiclient.errors.BatchError if the response is the wrong format.
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Execute all the requests as a single batched HTTP request.
Args:
http: httplib2.Http, an http object to be used in place of the one the
HttpRequest request object was constructed with. If one isn't supplied
then use a http object from the requests in this batch.
Returns:
None
Raises:
httplib2.HttpLib2Error if a transport error has occured.
googleapiclient.errors.BatchError if the response is the wrong format.
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