341 lines
9.8 KiB
Nim
341 lines
9.8 KiB
Nim
## Nim-Dagger
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## Copyright (c) 2021 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 pkg/upraises
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push: {.upraises: [].}
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import std/sequtils
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import pkg/questionable
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import pkg/questionable/results
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import pkg/chronicles
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import pkg/chronos
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import pkg/presto
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import pkg/libp2p
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import pkg/stew/base10
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import pkg/stew/byteutils
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import pkg/confutils
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import pkg/libp2p/routing_record
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import ../node
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import ../blocktype
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import ../conf
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import ../contracts
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import ./json
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proc validate(
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pattern: string,
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value: string): int
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{.gcsafe, raises: [Defect].} =
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0
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proc encodeString(cid: type Cid): Result[string, cstring] =
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ok($cid)
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proc decodeString(T: type Cid, value: string): Result[Cid, cstring] =
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Cid
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.init(value)
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.mapErr do(e: CidError) -> cstring:
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case e
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of CidError.Incorrect: "Incorrect Cid"
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of CidError.Unsupported: "Unsupported Cid"
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of CidError.Overrun: "Overrun Cid"
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else: "Error parsing Cid"
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proc encodeString(peerId: PeerID): Result[string, cstring] =
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ok($peerId)
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proc decodeString(T: type PeerID, value: string): Result[PeerID, cstring] =
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PeerID.init(value)
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proc encodeString(address: MultiAddress): Result[string, cstring] =
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ok($address)
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proc decodeString(T: type MultiAddress, value: string): Result[MultiAddress, cstring] =
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MultiAddress
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.init(value)
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.mapErr do(e: string) -> cstring: cstring(e)
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proc decodeString(T: type SomeUnsignedInt, value: string): Result[T, cstring] =
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Base10.decode(T, value)
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proc encodeString(value: SomeUnsignedInt): Result[string, cstring] =
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ok(Base10.toString(value))
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proc decodeString(T: type Duration, value: string): Result[T, cstring] =
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let v = ? Base10.decode(uint32, value)
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ok(v.minutes)
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proc encodeString(value: Duration): Result[string, cstring] =
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ok($value)
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proc decodeString(T: type bool, value: string): Result[T, cstring] =
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try:
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ok(value.parseBool())
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except CatchableError as exc:
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let s: cstring = exc.msg
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err(s) # err(exc.msg) won't compile
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proc encodeString(value: bool): Result[string, cstring] =
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ok($value)
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proc decodeString(_: type UInt256, value: string): Result[UInt256, cstring] =
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try:
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ok UInt256.fromHex(value)
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except ValueError as e:
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err e.msg.cstring
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proc decodeString(_: type array[32, byte],
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value: string): Result[array[32, byte], cstring] =
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try:
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ok array[32, byte].fromHex(value)
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except ValueError as e:
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err e.msg.cstring
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proc initRestApi*(node: DaggerNodeRef, conf: DaggerConf): RestRouter =
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var router = RestRouter.init(validate)
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router.api(
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MethodGet,
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"/api/dagger/v1/connect/{peerId}") do (
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peerId: PeerID,
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addrs: seq[MultiAddress]) -> RestApiResponse:
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## Connect to a peer
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##
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## If `addrs` param is supplied, it will be used to
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## dial the peer, otherwise the `peerId` is used
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## to invoke peer discovery, if it succeeds
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## the returned addresses will be used to dial
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##
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if peerId.isErr:
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return RestApiResponse.error(
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Http400,
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$peerId.error())
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let addresses = if addrs.isOk and addrs.get().len > 0:
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addrs.get()
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else:
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without peerRecord =? (await node.findPeer(peerId.get())):
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return RestApiResponse.error(
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Http400,
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"Unable to find Peer!")
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peerRecord.addresses.mapIt(it.address)
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try:
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await node.connect(peerId.get(), addresses)
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return RestApiResponse.response("Successfully connected to peer")
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except DialFailedError as e:
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return RestApiResponse.error(Http400, "Unable to dial peer")
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except CatchableError as e:
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return RestApiResponse.error(Http400, "Unknown error dialling peer")
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router.api(
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MethodGet,
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"/api/dagger/v1/download/{id}") do (
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id: Cid, resp: HttpResponseRef) -> RestApiResponse:
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## Download a file from the node in a streaming
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## manner
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##
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if id.isErr:
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return RestApiResponse.error(
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Http400,
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$id.error())
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var
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stream: LPStream
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var bytes = 0
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try:
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without stream =? (await node.retrieve(id.get())), error:
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return RestApiResponse.error(Http404, error.msg)
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resp.addHeader("Content-Type", "application/octet-stream")
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await resp.prepareChunked()
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while not stream.atEof:
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var
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buff = newSeqUninitialized[byte](BlockSize)
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len = await stream.readOnce(addr buff[0], buff.len)
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buff.setLen(len)
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if buff.len <= 0:
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break
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bytes += buff.len
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trace "Sending chunk", size = buff.len
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await resp.sendChunk(addr buff[0], buff.len)
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await resp.finish()
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except CatchableError as exc:
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trace "Excepting streaming blocks", exc = exc.msg
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return RestApiResponse.error(Http500)
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finally:
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trace "Sent bytes", cid = id.get(), bytes
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if not stream.isNil:
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await stream.close()
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router.rawApi(
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MethodPost,
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"/api/dagger/v1/storage/request/{cid}") do (cid: Cid) -> RestApiResponse:
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## Create a request for storage
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##
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## cid - the cid of a previously uploaded dataset
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## duration - the duration of the contract
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## maxPrice - the maximum price the client is willing to pay
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# TODO: store on multiple nodes
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let nodes: uint = 1
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let tolerance: uint = 0
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without cid =? cid.tryGet.catch, error:
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return RestApiResponse.error(Http400, error.msg)
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let body = await request.getBody()
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without params =? StorageRequestParams.fromJson(body), error:
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return RestApiResponse.error(Http400, error.msg)
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without purchaseId =? await node.requestStorage(cid,
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params.duration,
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nodes,
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tolerance,
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params.maxPrice), error:
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return RestApiResponse.error(Http500, error.msg)
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return RestApiResponse.response(purchaseId.toHex)
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router.rawApi(
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MethodPost,
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"/api/dagger/v1/upload") do (
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) -> RestApiResponse:
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## Upload a file in a streamming manner
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##
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trace "Handling file upload"
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var bodyReader = request.getBodyReader()
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if bodyReader.isErr():
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return RestApiResponse.error(Http500)
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# Attempt to handle `Expect` header
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# some clients (curl), wait 1000ms
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# before giving up
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#
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await request.handleExpect()
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let
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reader = bodyReader.get()
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stream = BufferStream.new()
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storeFut = node.store(stream)
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var bytes = 0
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try:
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while not reader.atEof:
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var
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buff = newSeqUninitialized[byte](BlockSize)
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len = await reader.readOnce(addr buff[0], buff.len)
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buff.setLen(len)
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if len <= 0:
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break
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trace "Got chunk from endpoint", len = buff.len
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await stream.pushData(buff)
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bytes += len
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await stream.pushEof()
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without cid =? (await storeFut), error:
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return RestApiResponse.error(Http500, error.msg)
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trace "Uploaded file", bytes, cid = $cid
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return RestApiResponse.response($cid)
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except CancelledError as exc:
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await reader.closeWait()
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return RestApiResponse.error(Http500)
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except AsyncStreamError:
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await reader.closeWait()
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return RestApiResponse.error(Http500)
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finally:
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await stream.close()
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await reader.closeWait()
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# if we got here something went wrong?
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return RestApiResponse.error(Http500)
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router.api(
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MethodGet,
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"/api/dagger/v1/info") do () -> RestApiResponse:
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## Print rudimentary node information
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##
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var addrs: string
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for a in node.switch.peerInfo.addrs:
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addrs &= "- " & $a & "\n"
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return RestApiResponse.response(
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"Id: " & $node.switch.peerInfo.peerId &
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"\nAddrs: \n" & addrs &
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"\nRoot Dir: " & $conf.dataDir)
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router.api(
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MethodGet,
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"/api/dagger/v1/sales/availability") do () -> RestApiResponse:
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## Returns storage that is for sale
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without contracts =? node.contracts:
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return RestApiResponse.error(Http503, "Sales unavailable")
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let json = %contracts.sales.available
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return RestApiResponse.response($json)
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router.rawApi(
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MethodPost,
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"/api/dagger/v1/sales/availability") do () -> RestApiResponse:
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## Add available storage to sell
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##
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## size - size of available storage in bytes
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## duration - maximum time the storage should be sold for (in seconds)
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## minPrice - minimum price to be paid (in amount of tokens)
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without contracts =? node.contracts:
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return RestApiResponse.error(Http503, "Sales unavailable")
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let body = await request.getBody()
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without availability =? Availability.fromJson(body), error:
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return RestApiResponse.error(Http400, error.msg)
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contracts.sales.add(availability)
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let json = %availability
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return RestApiResponse.response($json)
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router.api(
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MethodGet,
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"/api/dagger/v1/storage/purchases/{id}") do (
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id: array[32, byte]) -> RestApiResponse:
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without contracts =? node.contracts:
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return RestApiResponse.error(Http503, "Purchasing unavailable")
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without id =? id.tryGet.catch, error:
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return RestApiResponse.error(Http400, error.msg)
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without purchase =? contracts.purchasing.getPurchase(id):
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return RestApiResponse.error(Http404)
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let json = %purchase
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return RestApiResponse.response($json)
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return router
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