105 lines
3.4 KiB
Nim
105 lines
3.4 KiB
Nim
## Nim-LibP2P
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## Copyright (c) 2018 Status Research & Development GmbH
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## Licensed under either of
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## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
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## * MIT license ([LICENSE-MIT](LICENSE-MIT))
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## at your option.
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## This file may not be copied, modified, or distributed except according to
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## those terms.
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import chronos
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import lpstream
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type ChronosStream* = ref object of LPStream
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reader: AsyncStreamReader
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writer: AsyncStreamWriter
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server: StreamServer
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client: StreamTransport
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proc newChronosStream*(server: StreamServer,
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client: StreamTransport): ChronosStream =
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new result
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result.server = server
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result.client = client
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result.reader = newAsyncStreamReader(client)
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result.writer = newAsyncStreamWriter(client)
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result.closed = false
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method read*(s: ChronosStream, n = -1): Future[seq[byte]] {.async, gcsafe.} =
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try:
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result = await s.reader.read(n)
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except AsyncStreamReadError as exc:
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raise newLPStreamReadError(exc.par)
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method readExactly*(s: ChronosStream,
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pbytes: pointer,
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nbytes: int): Future[void] {.async, gcsafe.} =
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try:
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await s.reader.readExactly(pbytes, nbytes)
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except AsyncStreamIncompleteError:
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raise newLPStreamIncompleteError()
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except AsyncStreamReadError as exc:
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raise newLPStreamReadError(exc.par)
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method readLine*(s: ChronosStream, limit = 0, sep = "\r\n"): Future[string] {.async, gcsafe.} =
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try:
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result = await s.reader.readLine(limit, sep)
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except AsyncStreamReadError as exc:
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raise newLPStreamReadError(exc.par)
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method readOnce*(s: ChronosStream, pbytes: pointer, nbytes: int): Future[int] {.async, gcsafe.} =
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try:
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result = await s.reader.readOnce(pbytes, nbytes)
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except AsyncStreamReadError as exc:
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raise newLPStreamReadError(exc.par)
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method readUntil*(s: ChronosStream,
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pbytes: pointer,
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nbytes: int,
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sep: seq[byte]): Future[int] {.async, gcsafe.} =
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try:
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result = await s.reader.readUntil(pbytes, nbytes, sep)
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except TransportIncompleteError, AsyncStreamIncompleteError:
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raise newLPStreamIncompleteError()
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except TransportLimitError, AsyncStreamLimitError:
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raise newLPStreamLimitError()
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except LPStreamReadError as exc:
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raise newLPStreamReadError(exc.par)
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method write*(s: ChronosStream, pbytes: pointer, nbytes: int) {.async, gcsafe.} =
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try:
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await s.writer.write(pbytes, nbytes)
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except AsyncStreamWriteError as exc:
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raise newLPStreamWriteError(exc.par)
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except AsyncStreamIncompleteError:
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raise newLPStreamIncompleteError()
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method write*(s: ChronosStream, msg: string, msglen = -1) {.async, gcsafe.} =
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try:
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await s.writer.write(msg, msglen)
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except AsyncStreamWriteError as exc:
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raise newLPStreamWriteError(exc.par)
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except AsyncStreamIncompleteError:
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raise newLPStreamIncompleteError()
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method write*(s: ChronosStream, msg: seq[byte], msglen = -1) {.async, gcsafe.} =
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try:
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await s.writer.write(msg, msglen)
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except AsyncStreamWriteError as exc:
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raise newLPStreamWriteError(exc.par)
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except AsyncStreamIncompleteError:
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raise newLPStreamIncompleteError()
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method close*(s: ChronosStream) {.async, gcsafe.} =
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if not s.closed:
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if not s.reader.closed:
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await s.reader.closeWait()
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await s.writer.finish()
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if not s.writer.closed:
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await s.writer.closeWait()
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if not s.client.closed:
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await s.client.closeWait()
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s.closed = true |