633 lines
No EOL
20 KiB
Python
633 lines
No EOL
20 KiB
Python
"""
|
|
Interfaces which are implemented by various classes within LBRYnet.
|
|
"""
|
|
from zope.interface import Interface
|
|
|
|
|
|
class IPeerFinder(Interface):
|
|
"""
|
|
Used to find peers by sha384 hashes which they claim to be associated with.
|
|
"""
|
|
def find_peers_for_blob(self, blob_hash):
|
|
"""
|
|
Look for peers claiming to be associated with a sha384 hashsum.
|
|
|
|
@param blob_hash: The sha384 hashsum to use to look up peers.
|
|
@type blob_hash: string, hex encoded
|
|
|
|
@return: a Deferred object which fires with a list of Peer objects
|
|
@rtype: Deferred which fires with [Peer]
|
|
"""
|
|
|
|
|
|
class IRequestSender(Interface):
|
|
"""
|
|
Used to connect to a peer, send requests to it, and return the responses to those requests.
|
|
"""
|
|
def add_request(self, request):
|
|
"""
|
|
Add a request to the next message that will be sent to the peer
|
|
|
|
@param request: a request to be sent to the peer in the next message
|
|
@type request: ClientRequest
|
|
|
|
@return: Deferred object which will callback with the response to this request, a dict
|
|
@rtype: Deferred which fires with dict
|
|
"""
|
|
|
|
def add_blob_request(self, blob_request):
|
|
"""
|
|
Add a request for a blob to the next message that will be sent to the peer.
|
|
|
|
This will cause the protocol to call blob_request.write(data) for all incoming
|
|
data, after the response message has been parsed out, until blob_request.finished_deferred fires.
|
|
|
|
@param blob_request: the request for the blob
|
|
@type blob_request: ClientBlobRequest
|
|
|
|
@return: Deferred object which will callback with the response to this request
|
|
@rtype: Deferred which fires with dict
|
|
"""
|
|
|
|
|
|
class IRequestCreator(Interface):
|
|
"""
|
|
Send requests, via an IRequestSender, to peers.
|
|
"""
|
|
|
|
def send_next_request(self, peer, protocol):
|
|
"""
|
|
Create a Request object for the peer and then give the protocol that request.
|
|
|
|
@param peer: the Peer object which the request will be sent to.
|
|
@type peer: Peer
|
|
|
|
@param protocol: the protocol to pass the request to.
|
|
@type protocol: object which implements IRequestSender
|
|
|
|
@return: Deferred object which will callback with True or False depending on whether a Request was sent
|
|
@rtype: Deferred which fires with boolean
|
|
"""
|
|
|
|
def get_new_peers(self):
|
|
"""
|
|
Get some new peers which the request creator wants to send requests to.
|
|
|
|
@return: Deferred object which will callback with [Peer]
|
|
@rtype: Deferred which fires with [Peer]
|
|
"""
|
|
|
|
|
|
class IMetadataHandler(Interface):
|
|
"""
|
|
Get metadata for the IDownloadManager.
|
|
"""
|
|
def get_initial_blobs(self):
|
|
"""
|
|
Return metadata about blobs that are known to be associated with the stream at the time that the
|
|
stream is set up.
|
|
|
|
@return: Deferred object which will call back with a list of BlobInfo objects
|
|
@rtype: Deferred which fires with [BlobInfo]
|
|
"""
|
|
|
|
def final_blob_num(self):
|
|
"""
|
|
If the last blob in the stream is known, return its blob_num. Otherwise, return None.
|
|
|
|
@return: integer representing the final blob num in the stream, or None
|
|
@rtype: integer or None
|
|
"""
|
|
|
|
|
|
class IDownloadManager(Interface):
|
|
"""
|
|
Manage the downloading of an associated group of blobs, referred to as a stream.
|
|
|
|
These objects keep track of metadata about the stream, are responsible for starting and stopping
|
|
other components, and handle communication between other components.
|
|
"""
|
|
|
|
def start_downloading(self):
|
|
"""
|
|
Load the initial metadata about the stream and then start the other components.
|
|
|
|
@return: Deferred which fires when the other components have been started.
|
|
@rtype: Deferred which fires with boolean
|
|
"""
|
|
|
|
def resume_downloading(self):
|
|
"""
|
|
Start the other components after they have been stopped.
|
|
|
|
@return: Deferred which fires when the other components have been started.
|
|
@rtype: Deferred which fires with boolean
|
|
"""
|
|
|
|
def pause_downloading(self):
|
|
"""
|
|
Stop the other components.
|
|
|
|
@return: Deferred which fires when the other components have been stopped.
|
|
@rtype: Deferred which fires with boolean
|
|
"""
|
|
|
|
def add_blobs_to_download(self, blobs):
|
|
"""
|
|
Add blobs to the list of blobs that should be downloaded
|
|
|
|
@param blobs: list of BlobInfos that are associated with the stream being downloaded
|
|
@type blobs: [BlobInfo]
|
|
|
|
@return: DeferredList which fires with the result of adding each previously unknown BlobInfo
|
|
to the list of known BlobInfos.
|
|
@rtype: DeferredList which fires with [(boolean, Failure/None)]
|
|
"""
|
|
|
|
def stream_position(self):
|
|
"""
|
|
Returns the blob_num of the next blob needed in the stream.
|
|
|
|
If the stream already has all of the blobs it needs, then this will return the blob_num
|
|
of the last blob in the stream plus 1.
|
|
|
|
@return: the blob_num of the next blob needed, or the last blob_num + 1.
|
|
@rtype: integer
|
|
"""
|
|
|
|
def needed_blobs(self):
|
|
"""
|
|
Returns a list of BlobInfos representing all of the blobs that the stream still needs to download.
|
|
|
|
@return: the list of BlobInfos representing blobs that the stream still needs to download.
|
|
@rtype: [BlobInfo]
|
|
"""
|
|
|
|
def final_blob_num(self):
|
|
"""
|
|
If the last blob in the stream is known, return its blob_num. If not, return None.
|
|
|
|
@return: The blob_num of the last blob in the stream, or None if it is unknown.
|
|
@rtype: integer or None
|
|
"""
|
|
|
|
def handle_blob(self, blob_num):
|
|
"""
|
|
This function is called when the next blob in the stream is ready to be handled, whatever that may mean.
|
|
|
|
@param blob_num: The blob_num of the blob that is ready to be handled.
|
|
@type blob_num: integer
|
|
|
|
@return: A Deferred which fires when the blob has been 'handled'
|
|
@rtype: Deferred which can fire with anything
|
|
"""
|
|
|
|
|
|
class IConnectionManager(Interface):
|
|
"""
|
|
Connects to peers so that IRequestCreators can send their requests.
|
|
"""
|
|
def get_next_request(self, peer, protocol):
|
|
"""
|
|
Ask all IRequestCreators belonging to this object to create a Request for peer and give it to protocol
|
|
|
|
@param peer: the peer which the request will be sent to.
|
|
@type peer: Peer
|
|
|
|
@param protocol: the protocol which the request should be sent to by the IRequestCreator.
|
|
@type protocol: IRequestSender
|
|
|
|
@return: Deferred object which will callback with True or False depending on whether the IRequestSender
|
|
should send the request or hang up
|
|
@rtype: Deferred which fires with boolean
|
|
"""
|
|
|
|
def protocol_disconnected(self, peer, protocol):
|
|
"""
|
|
Inform the IConnectionManager that the protocol has been disconnected
|
|
|
|
@param peer: The peer which the connection was to.
|
|
@type peer: Peer
|
|
|
|
@param protocol: The protocol which was disconnected.
|
|
@type protocol: Protocol
|
|
|
|
@return: None
|
|
"""
|
|
|
|
|
|
class IProgressManager(Interface):
|
|
"""
|
|
Responsible for keeping track of the progress of the download.
|
|
|
|
Specifically, it is their responsibility to decide which blobs need to be downloaded and keep track of
|
|
the progress of the download
|
|
"""
|
|
def stream_position(self):
|
|
"""
|
|
Returns the blob_num of the next blob needed in the stream.
|
|
|
|
If the stream already has all of the blobs it needs, then this will return the blob_num
|
|
of the last blob in the stream plus 1.
|
|
|
|
@return: the blob_num of the next blob needed, or the last blob_num + 1.
|
|
@rtype: integer
|
|
"""
|
|
|
|
def needed_blobs(self):
|
|
"""
|
|
Returns a list of BlobInfos representing all of the blobs that the stream still needs to download.
|
|
|
|
@return: the list of BlobInfos representing blobs that the stream still needs to download.
|
|
@rtype: [BlobInfo]
|
|
"""
|
|
|
|
def blob_downloaded(self, blob, blob_info):
|
|
"""
|
|
Mark that a blob has been downloaded and does not need to be downloaded again
|
|
|
|
@param blob: the blob that has been downloaded.
|
|
@type blob: Blob
|
|
|
|
@param blob_info: the metadata of the blob that has been downloaded.
|
|
@type blob_info: BlobInfo
|
|
|
|
@return: None
|
|
"""
|
|
|
|
|
|
class IBlobHandler(Interface):
|
|
"""
|
|
Responsible for doing whatever should be done with blobs that have been downloaded.
|
|
"""
|
|
def blob_downloaded(self, blob, blob_info):
|
|
"""
|
|
Do whatever the downloader is supposed to do when a blob has been downloaded
|
|
|
|
@param blob: The downloaded blob
|
|
@type blob: Blob
|
|
|
|
@param blob_info: The metadata of the downloaded blob
|
|
@type blob_info: BlobInfo
|
|
|
|
@return: A Deferred which fires when the blob has been handled.
|
|
@rtype: Deferred which can fire with anything
|
|
"""
|
|
|
|
|
|
class IRateLimited(Interface):
|
|
"""
|
|
Have the ability to be throttled (temporarily stopped).
|
|
"""
|
|
def throttle_upload(self):
|
|
"""
|
|
Stop uploading data until unthrottle_upload is called.
|
|
|
|
@return: None
|
|
"""
|
|
|
|
def throttle_download(self):
|
|
"""
|
|
Stop downloading data until unthrottle_upload is called.
|
|
|
|
@return: None
|
|
"""
|
|
|
|
def unthrottle_upload(self):
|
|
"""
|
|
Resume uploading data at will until throttle_upload is called.
|
|
|
|
@return: None
|
|
"""
|
|
|
|
def unthrottle_downlad(self):
|
|
"""
|
|
Resume downloading data at will until throttle_download is called.
|
|
|
|
@return: None
|
|
"""
|
|
|
|
|
|
class IRateLimiter(Interface):
|
|
"""
|
|
Can keep track of download and upload rates and can throttle objects which implement the
|
|
IRateLimited interface.
|
|
"""
|
|
def report_dl_bytes(self, num_bytes):
|
|
"""
|
|
Inform the IRateLimiter that num_bytes have been downloaded.
|
|
|
|
@param num_bytes: the number of bytes that have been downloaded
|
|
@type num_bytes: integer
|
|
|
|
@return: None
|
|
"""
|
|
|
|
def report_ul_bytes(self, num_bytes):
|
|
"""
|
|
Inform the IRateLimiter that num_bytes have been uploaded.
|
|
|
|
@param num_bytes: the number of bytes that have been uploaded
|
|
@type num_bytes: integer
|
|
|
|
@return: None
|
|
"""
|
|
|
|
def register_protocol(self, protocol):
|
|
"""
|
|
Register an IRateLimited object with the IRateLimiter so that the IRateLimiter can throttle it
|
|
|
|
@param protocol: An object implementing the interface IRateLimited
|
|
@type protocol: Object implementing IRateLimited
|
|
|
|
@return: None
|
|
"""
|
|
|
|
def unregister_protocol(self, protocol):
|
|
"""
|
|
Unregister an IRateLimited object so that it won't be throttled any more.
|
|
|
|
@param protocol: An object implementing the interface IRateLimited, which was previously registered with this
|
|
IRateLimiter via "register_protocol"
|
|
@type protocol: Object implementing IRateLimited
|
|
|
|
@return: None
|
|
"""
|
|
|
|
|
|
class IRequestHandler(Interface):
|
|
"""
|
|
Pass client queries on to IQueryHandlers
|
|
"""
|
|
def register_query_handler(self, query_handler, query_identifiers):
|
|
"""
|
|
Register a query handler, which will be passed any queries that
|
|
match any of the identifiers in query_identifiers
|
|
|
|
@param query_handler: the object which will handle queries matching the given query_identifiers
|
|
@type query_handler: Object implementing IQueryHandler
|
|
|
|
@param query_identifiers: A list of strings representing the query identifiers
|
|
for queries that should be passed to this handler
|
|
@type query_identifiers: [string]
|
|
|
|
@return: None
|
|
"""
|
|
|
|
def register_blob_sender(self, blob_sender):
|
|
"""
|
|
Register a blob sender which will be called after the response has
|
|
finished to see if it wants to send a blob
|
|
|
|
@param blob_sender: the object which will upload the blob to the client.
|
|
@type blob_sender: IBlobSender
|
|
|
|
@return: None
|
|
"""
|
|
|
|
|
|
class IBlobSender(Interface):
|
|
"""
|
|
Upload blobs to clients.
|
|
"""
|
|
def send_blob_if_requested(self, consumer):
|
|
"""
|
|
If a blob has been requested, write it to 'write' func of the consumer and then
|
|
callback the returned deferred when it has all been written
|
|
|
|
@param consumer: the object implementing IConsumer which the file will be written to
|
|
@type consumer: object which implements IConsumer
|
|
|
|
@return: Deferred which will fire when the blob sender is done, which will be
|
|
immediately if no blob should be sent.
|
|
@rtype: Deferred which fires with anything
|
|
"""
|
|
|
|
|
|
class IQueryHandler(Interface):
|
|
"""
|
|
Respond to requests from clients.
|
|
"""
|
|
def register_with_request_handler(self, request_handler, peer):
|
|
"""
|
|
Register with the request handler to receive queries
|
|
|
|
@param request_handler: the object implementing IRequestHandler to register with
|
|
@type request_handler: object implementing IRequestHandler
|
|
|
|
@param peer: the Peer which this query handler will be answering requests from
|
|
@type peer: Peer
|
|
|
|
@return: None
|
|
"""
|
|
|
|
def handle_queries(self, queries):
|
|
"""
|
|
Return responses to queries from the client.
|
|
|
|
@param queries: a dict representing the query_identifiers:queries that should be handled
|
|
@type queries: {string: dict}
|
|
|
|
@return: a Deferred object which will callback with a dict of query responses
|
|
@rtype: Deferred which fires with {string: dict}
|
|
"""
|
|
|
|
|
|
class IQueryHandlerFactory(Interface):
|
|
"""
|
|
Construct IQueryHandlers to handle queries from each new client that connects.
|
|
"""
|
|
def build_query_handler(self):
|
|
"""
|
|
Create an object that implements the IQueryHandler interface
|
|
|
|
@return: object that implements IQueryHandler
|
|
"""
|
|
|
|
|
|
class IStreamDownloaderFactory(Interface):
|
|
"""
|
|
Construct IStreamDownloaders and provide options that will be passed to those IStreamDownloaders.
|
|
"""
|
|
def get_downloader_options(self, sd_validator, payment_rate_manager):
|
|
"""
|
|
Return the list of options that can be used to modify IStreamDownloader behavior
|
|
|
|
@param sd_validator: object containing stream metadata, which the options may depend on
|
|
@type sd_validator: object which implements IStreamDescriptorValidator interface
|
|
|
|
@param payment_rate_manager: The payment rate manager currently in effect for the downloader
|
|
@type payment_rate_manager: PaymentRateManager
|
|
|
|
@return: [(option_description, default)]
|
|
@rtype: [(string, string)]
|
|
"""
|
|
|
|
def make_downloader(self, sd_validator, options, payment_rate_manager):
|
|
"""
|
|
Create an object that implements the IStreamDownloader interface
|
|
|
|
@param sd_validator: object containing stream metadata which will be given to the IStreamDownloader
|
|
@type sd_validator: object which implements IStreamDescriptorValidator interface
|
|
|
|
@param options: a list of strings that will be used by the IStreamDownloaderFactory to
|
|
construct the IStreamDownloader. the options are in the same order as they were given
|
|
by get_downloader_options.
|
|
@type options: [string]
|
|
|
|
@param payment_rate_manager: the PaymentRateManager which the IStreamDownloader should use.
|
|
@type payment_rate_manager: PaymentRateManager
|
|
|
|
@return: a Deferred which fires with the downloader object
|
|
@rtype: Deferred which fires with IStreamDownloader
|
|
"""
|
|
|
|
def get_description(self):
|
|
"""
|
|
Return a string detailing what this downloader does with streams
|
|
|
|
@return: short description of what the IStreamDownloader does.
|
|
@rtype: string
|
|
"""
|
|
|
|
|
|
class IStreamDownloader(Interface):
|
|
"""
|
|
Use metadata and data from the network for some useful purpose.
|
|
"""
|
|
def start(self):
|
|
"""
|
|
start downloading the stream
|
|
|
|
@return: a Deferred which fires when the stream is finished downloading, or errbacks when the stream is
|
|
cancelled.
|
|
@rtype: Deferred which fires with anything
|
|
"""
|
|
|
|
def insufficient_funds(self):
|
|
"""
|
|
this function informs the stream downloader that funds are too low to finish downloading.
|
|
|
|
@return: None
|
|
"""
|
|
|
|
|
|
class IStreamDescriptorValidator(Interface):
|
|
"""
|
|
Pull metadata out of Stream Descriptor Files and perform some
|
|
validation on the metadata.
|
|
"""
|
|
def validate(self):
|
|
"""
|
|
@return: whether the stream descriptor passes validation checks
|
|
@rtype: boolean
|
|
"""
|
|
|
|
def info_to_show(self):
|
|
"""
|
|
@return: A list of tuples representing metadata that should be presented to the user before starting the
|
|
download
|
|
@rtype: [(string, string)]
|
|
"""
|
|
|
|
|
|
class ILBRYWallet(Interface):
|
|
"""
|
|
Send and receive payments.
|
|
|
|
To send a payment, a payment reservation must be obtained first. This guarantees that a payment
|
|
isn't promised if it can't be paid. When the service in question is rendered, the payment
|
|
reservation must be given to the ILBRYWallet along with the final price. The reservation can also
|
|
be canceled.
|
|
"""
|
|
def stop(self):
|
|
"""
|
|
Send out any unsent payments, close any connections, and stop checking for incoming payments.
|
|
|
|
@return: None
|
|
"""
|
|
|
|
def start(self):
|
|
"""
|
|
Set up any connections and start checking for incoming payments
|
|
|
|
@return: None
|
|
"""
|
|
def get_info_exchanger(self):
|
|
"""
|
|
Get the object that will be used to find the payment addresses of peers.
|
|
|
|
@return: The object that will be used to find the payment addresses of peers.
|
|
@rtype: An object implementing IRequestCreator
|
|
"""
|
|
|
|
def get_wallet_info_query_handler_factory(self):
|
|
"""
|
|
Get the object that will be used to give our payment address to peers.
|
|
|
|
This must return an object implementing IQueryHandlerFactory. It will be used to
|
|
create IQueryHandler objects that will be registered with an IRequestHandler.
|
|
|
|
@return: The object that will be used to give our payment address to peers.
|
|
@rtype: An object implementing IQueryHandlerFactory
|
|
"""
|
|
|
|
def reserve_points(self, peer, amount):
|
|
"""
|
|
Ensure a certain amount of points are available to be sent as payment, before the service is rendered
|
|
|
|
@param peer: The peer to which the payment will ultimately be sent
|
|
@type peer: Peer
|
|
|
|
@param amount: The amount of points to reserve
|
|
@type amount: float
|
|
|
|
@return: A ReservedPoints object which is given to send_points once the service has been rendered
|
|
@rtype: ReservedPoints
|
|
"""
|
|
|
|
def cancel_point_reservation(self, reserved_points):
|
|
"""
|
|
Return all of the points that were reserved previously for some ReservedPoints object
|
|
|
|
@param reserved_points: ReservedPoints previously returned by reserve_points
|
|
@type reserved_points: ReservedPoints
|
|
|
|
@return: None
|
|
"""
|
|
|
|
def send_points(self, reserved_points, amount):
|
|
"""
|
|
Schedule a payment to be sent to a peer
|
|
|
|
@param reserved_points: ReservedPoints object previously returned by reserve_points.
|
|
@type reserved_points: ReservedPoints
|
|
|
|
@param amount: amount of points to actually send, must be less than or equal to the
|
|
amount reserved in reserved_points
|
|
@type amount: float
|
|
|
|
@return: Deferred which fires when the payment has been scheduled
|
|
@rtype: Deferred which fires with anything
|
|
"""
|
|
|
|
def get_balance(self):
|
|
"""
|
|
Return the balance of this wallet
|
|
|
|
@return: Deferred which fires with the balance of the wallet
|
|
@rtype: Deferred which fires with float
|
|
"""
|
|
|
|
def add_expected_payment(self, peer, amount):
|
|
"""
|
|
Increase the number of points expected to be paid by a peer
|
|
|
|
@param peer: the peer which is expected to pay the points
|
|
@type peer: Peer
|
|
|
|
@param amount: the amount of points expected to be paid
|
|
@type amount: float
|
|
|
|
@return: None
|
|
""" |