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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsISupports.idl"
interface nsIInputStream;
interface nsIOutputStream;
interface nsITransportEventSink;
interface nsIEventTarget;
/**
* nsITransport
*
* This interface provides a common way of accessing i/o streams connected
* to some resource. This interface does not in any way specify the resource.
* It provides methods to open blocking or non-blocking, buffered or unbuffered
* streams to the resource. The name "transport" is meant to connote the
* inherent data transfer implied by this interface (i.e., data is being
* transfered in some fashion via the streams exposed by this interface).
*
* A transport can have an event sink associated with it. The event sink
* receives transport-specific events as the transfer is occuring. For a
* socket transport, these events can include status about the connection.
* See nsISocketTransport for more info about socket transport specifics.
*/
[scriptable, uuid(2a8c6334-a5e6-4ec3-9865-1256541446fb)]
interface nsITransport : nsISupports
{
/**
* Open flags.
*/
const unsigned long OPEN_BLOCKING = 1<<0;
const unsigned long OPEN_UNBUFFERED = 1<<1;
/**
* Open an input stream on this transport.
*
* Flags have the following meaning:
*
* OPEN_BLOCKING
* If specified, then the resulting stream will have blocking stream
* semantics. This means that if the stream has no data and is not
* closed, then reading from it will block the calling thread until
* at least one byte is available or until the stream is closed.
* If this flag is NOT specified, then the stream has non-blocking
* stream semantics. This means that if the stream has no data and is
* not closed, then reading from it returns NS_BASE_STREAM_WOULD_BLOCK.
* In addition, in non-blocking mode, the stream is guaranteed to
* support nsIAsyncInputStream. This interface allows the consumer of
* the stream to be notified when the stream can again be read.
*
* OPEN_UNBUFFERED
* If specified, the resulting stream may not support ReadSegments.
* ReadSegments is only gauranteed to be implemented when this flag is
* NOT specified.
*
* @param aFlags
* optional transport specific flags.
* @param aSegmentSize
* if OPEN_UNBUFFERED is not set, then this parameter specifies the
* size of each buffer segment (pass 0 to use default value).
* @param aSegmentCount
* if OPEN_UNBUFFERED is not set, then this parameter specifies the
* maximum number of buffer segments (pass 0 to use default value).
*/
nsIInputStream openInputStream(in unsigned long aFlags,
in unsigned long aSegmentSize,
in unsigned long aSegmentCount);
/**
* Open an output stream on this transport.
*
* Flags have the following meaning:
*
* OPEN_BLOCKING
* If specified, then the resulting stream will have blocking stream
* semantics. This means that if the stream is full and is not closed,
* then writing to it will block the calling thread until ALL of the
* data can be written or until the stream is closed. If this flag is
* NOT specified, then the stream has non-blocking stream semantics.
* This means that if the stream is full and is not closed, then writing
* to it returns NS_BASE_STREAM_WOULD_BLOCK. In addition, in non-
* blocking mode, the stream is guaranteed to support
* nsIAsyncOutputStream. This interface allows the consumer of the
* stream to be notified when the stream can again accept more data.
*
* OPEN_UNBUFFERED
* If specified, the resulting stream may not support WriteSegments and
* WriteFrom. WriteSegments and WriteFrom are only guaranteed to be
* implemented when this flag is NOT specified.
*
* @param aFlags
* optional transport specific flags.
* @param aSegmentSize
* if OPEN_UNBUFFERED is not set, then this parameter specifies the
* size of each buffer segment (pass 0 to use default value).
* @param aSegmentCount
* if OPEN_UNBUFFERED is not set, then this parameter specifies the
* maximum number of buffer segments (pass 0 to use default value).
*/
nsIOutputStream openOutputStream(in unsigned long aFlags,
in unsigned long aSegmentSize,
in unsigned long aSegmentCount);
/**
* Close the transport and any open streams.
*
* @param aReason
* the reason for closing the stream.
*/
void close(in nsresult aReason);
/**
* Set the transport event sink.
*
* @param aSink
* receives transport layer notifications
* @param aEventTarget
* indicates the event target to which the notifications should
* be delivered. if NULL, then the notifications may occur on
* any thread.
*/
void setEventSink(in nsITransportEventSink aSink,
in nsIEventTarget aEventTarget);
/**
* Generic nsITransportEventSink status codes. nsITransport
* implementations may override these status codes with their own more
* specific status codes (e.g., see nsISocketTransport).
*
* In C++, these constants have a type of uint32_t, so C++ callers must use
* the NS_NET_STATUS_* constants defined below, which have a type of
* nsresult.
*/
const unsigned long STATUS_READING = 0x804b0008;
const unsigned long STATUS_WRITING = 0x804b0009;
};
[scriptable, uuid(EDA4F520-67F7-484b-A691-8C3226A5B0A6)]
interface nsITransportEventSink : nsISupports
{
/**
* Transport status notification.
*
* @param aTransport
* the transport sending this status notification.
* @param aStatus
* the transport status (resolvable to a string using
* nsIErrorService). See nsISocketTransport for socket specific
* status codes and more comments.
* @param aProgress
* the amount of data either read or written depending on the value
* of the status code. this value is relative to aProgressMax.
* @param aProgressMax
* the maximum amount of data that will be read or written. if
* unknown, -1 will be passed.
*/
void onTransportStatus(in nsITransport aTransport,
in nsresult aStatus,
in long long aProgress,
in long long aProgressMax);
};