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48 lines
2.1 KiB
Plaintext
48 lines
2.1 KiB
Plaintext
// Copyright 2017 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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module blink.mojom;
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// Interface that can be implemented to be informed of certain information while
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// reading the data for a blob.
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interface BlobReaderClient {
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// Called when the size of the blob being read has been calculated:
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// |total_size| is the total size of the blob.
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// |expected_content_size| is how many bytes should be sent over the data
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// pipe, taking into account a range if the blob was read with ReadRange.
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// If an error occurs while reading the blob, this method might not get called.
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OnCalculatedSize(uint64 total_size,
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uint64 expected_content_size);
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// Called when reading the blob finished (with success or failure). Status is
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// a net::Error indicating any potential error that might have occurred,
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// |data_length| tells the reader how many bytes were written into the data
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// pipe, and can be used as a sanity check to make sure all bytes were
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// received.
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OnComplete(int32 status, uint64 data_length);
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};
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// This interface provides access to a blob in the blob system.
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interface Blob {
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// Creates a copy of this Blob reference.
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Clone(Blob& blob);
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// Causes the entire contents of this blob to be written into the given data
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// pipe. An optional BlobReaderClient will be informed of the result of the
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// read operation.
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ReadAll(handle<data_pipe_producer> pipe, BlobReaderClient? client);
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// Causes a subrange of the contents of this blob to be written into the given
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// data pipe. An optional BlobReaderClient will be informed of the result of
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// the read operation.
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ReadRange(uint64 offset, uint64 length, handle<data_pipe_producer> pipe,
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BlobReaderClient? client);
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// This method is an implementation detail of the blob system. You should not
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// ever need to call it directly.
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// This returns the internal UUID of the blob, used by the blob system to
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// identify the blob.
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GetInternalUUID() => (string uuid);
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};
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