AdaptivePlaywrightCrawler
Hierarchy
- PlaywrightCrawler
- AdaptivePlaywrightCrawler
Index
Constructors
constructor
Parameters
options: AdaptivePlaywrightCrawlerOptions = {}
config: Configuration = ...
Returns AdaptivePlaywrightCrawler
Properties
optionalautoscaledPool
A reference to the underlying AutoscaledPool class that manages the concurrency of the crawler.
NOTE: This property is only initialized after calling the
crawler.run()
function. We can use it to change the concurrency settings on the fly, to pause the crawler by callingautoscaledPool.pause()
or to abort it by callingautoscaledPool.abort()
.
browserPool
A reference to the underlying BrowserPool class that manages the crawler's browsers.
readonlyconfig
hasFinishedBefore
launchContext
readonlylog
optionalproxyConfiguration
A reference to the underlying ProxyConfiguration class that manages the crawler's proxies. Only available if used by the crawler.
optionalrequestList
A reference to the underlying RequestList class that manages the crawler's requests. Only available if used by the crawler.
optionalrequestQueue
Dynamic queue of URLs to be processed. This is useful for recursive crawling of websites. A reference to the underlying RequestQueue class that manages the crawler's requests. Only available if used by the crawler.
readonlyrouter
Default Router instance that will be used if we don't specify any requestHandler
.
See router.addHandler()
and router.addDefaultHandler()
.
running
optionalsessionPool
A reference to the underlying SessionPool class that manages the crawler's sessions. Only available if used by the crawler.
readonlystats
A reference to the underlying Statistics class that collects and logs run statistics for requests.
Methods
addRequests
Adds requests to the queue in batches. By default, it will resolve after the initial batch is added, and continue adding the rest in background. You can configure the batch size via
batchSize
option and the sleep time in between the batches viawaitBetweenBatchesMillis
. If you want to wait for all batches to be added to the queue, you can use thewaitForAllRequestsToBeAdded
promise you get in the response object.This is an alias for calling
addRequestsBatched()
on the implicitRequestQueue
for this crawler instance.Parameters
requests: (string | Source)[]
The requests to add
options: CrawlerAddRequestsOptions = {}
Options for the request queue
Returns Promise<CrawlerAddRequestsResult>
exportData
Retrieves all the data from the default crawler Dataset and exports them to the specified format. Supported formats are currently 'json' and 'csv', and will be inferred from the
path
automatically.Type parameters
- Data
Parameters
path: string
optionalformat: json | csv
optionaloptions: DatasetExportOptions
Returns Promise<Data[]>
getData
Retrieves data from the default crawler Dataset by calling Dataset.getData.
Parameters
rest...args: [options: DatasetDataOptions]
Returns Promise<DatasetContent<Dictionary>>
getDataset
getRequestQueue
Returns Promise<RequestProvider>
pushData
Pushes data to the specified Dataset, or the default crawler Dataset by calling Dataset.pushData.
Parameters
data: Dictionary | Dictionary[]
optionaldatasetIdOrName: string
Returns Promise<void>
run
Runs the crawler. Returns a promise that gets resolved once all the requests are processed. We can use the
requests
parameter to enqueue the initial requests - it is a shortcut for runningcrawler.addRequests()
before thecrawler.run()
.Parameters
optionalrequests: (string | Request<Dictionary> | RequestOptions<Dictionary>)[]
The requests to add
optionaloptions: CrawlerRunOptions
Options for the request queue
Returns Promise<FinalStatistics>
setStatusMessage
This method is periodically called by the crawler, every
statusMessageLoggingInterval
seconds.Parameters
message: string
options: SetStatusMessageOptions = {}
Returns Promise<void>
useState
Type parameters
- State: Dictionary = Dictionary
Parameters
defaultValue: State = ...
Returns Promise<State>
An extension of PlaywrightCrawler that uses a more limited request handler interface so that it is able to switch to HTTP-only crawling when it detects it may be possible.
Example usage: