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RequestQueueClient | API | Crawlee for Python · Fast, reliable Python web crawlers.

An abstract class for request queue resource clients.

These clients are specific to the type of resource they manage and operate under a designated storage client, like a memory storage client.

• Overrides RequestQueueClient.add_batch_of_requests

  Add batch of requests to the queue.

  This method adds a batch of requests to the queue. Each request is processed based on its uniqueness (determined by unique_key). Duplicates will be identified but not re-added to the queue.

  Parameters
  • requests: Sequence[Request]

    The collection of requests to add to the queue.

  • optionalkeyword-onlyforefront: bool = False

    Whether to put the added requests at the beginning (True) or the end (False) of the queue. When True, the requests will be processed sooner than previously added requests.

  Returns AddRequestsResponse

• Overrides RequestQueueClient.drop

  Drop the whole request queue and remove all its values.

  The backend method for the RequestQueue.drop call.

  Returns None

• async fetch_next_request(): Request | None

• Overrides RequestQueueClient.fetch_next_request

  Return the next request in the queue to be processed.

  Once you successfully finish processing of the request, you need to call RequestQueue.mark_request_as_handled to mark the request as handled in the queue. If there was some error in processing the request, call RequestQueue.reclaim_request instead, so that the queue will give the request to some other consumer in another call to the fetch_next_request method.

  Note that the None return value does not mean the queue processing finished, it means there are currently no pending requests. To check whether all requests in queue were finished, use RequestQueue.is_finished instead.

  Returns Request | None

• async get_request(request_id): Request | None

• Overrides RequestQueueClient.purge

  Purge all items from the request queue.

  The backend method for the RequestQueue.purge call.

  Returns None

• Overrides RequestQueueClient.reclaim_request

  Reclaim a failed request back to the queue.

  The request will be returned for processing later again by another call to RequestQueue.fetch_next_request.

  Parameters
  • request: Request

    The request to return to the queue.

  • optionalkeyword-onlyforefront: bool = False

    Whether to add the request to the head or the end of the queue.

  Returns ProcessedRequest | None

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