session -> channel and make open explicit for easier control
This commit is contained in:
parent
90e8bc3288
commit
21415211e7
45
README.md
45
README.md
|
@ -17,9 +17,9 @@ const c = require('compact-encoding')
|
|||
|
||||
const mux = new Protomux(aStreamThatFrames)
|
||||
|
||||
// Now add some protocol sessions
|
||||
// Now add some protocol channels
|
||||
|
||||
const cool = mux.open({
|
||||
const cool = mux.createChannel({
|
||||
protocol: 'cool-protocol',
|
||||
id: Buffer.from('optional binary id'),
|
||||
onopen () {
|
||||
|
@ -46,6 +46,11 @@ const two = cool.addMessage({
|
|||
}
|
||||
})
|
||||
|
||||
// open the channels
|
||||
|
||||
one.open()
|
||||
two.open()
|
||||
|
||||
// And send some data
|
||||
|
||||
one.send('a string')
|
||||
|
@ -71,9 +76,9 @@ Options include:
|
|||
|
||||
Helper to accept either an existing muxer instance or a stream (which creates a new one).
|
||||
|
||||
#### `const session = mux.open(opts)`
|
||||
#### `const channel = mux.createChannel(opts)`
|
||||
|
||||
Add a new protocol session.
|
||||
Add a new protocol channel.
|
||||
|
||||
Options include:
|
||||
|
||||
|
@ -81,14 +86,16 @@ Options include:
|
|||
{
|
||||
// Used to match the protocol
|
||||
protocol: 'name of the protocol',
|
||||
// Optional additional binary id to identify this session
|
||||
// Optional additional binary id to identify this channel
|
||||
id: buffer,
|
||||
// Optional encoding for a handshake
|
||||
handshake: encoding,
|
||||
// Optional array of messages types you want to send/receive.
|
||||
messages: [],
|
||||
// Called when the remote side adds this protocol.
|
||||
// Errors here are caught and forwared to stream.destroy
|
||||
async onopen () {},
|
||||
// Called when the session closes - ie the remote side closes or rejects this protocol or we closed it.
|
||||
async onopen (handshake) {},
|
||||
// Called when the channel closes - ie the remote side closes or rejects this protocol or we closed it.
|
||||
// Errors here are caught and forwared to stream.destroy
|
||||
async onclose () {},
|
||||
// Called after onclose when all pending promises has resolved.
|
||||
|
@ -96,13 +103,17 @@ Options include:
|
|||
}
|
||||
```
|
||||
|
||||
Sessions are paired based on a queue, so the first remote session with the same `protocol` and `id`.
|
||||
Sessions are paired based on a queue, so the first remote channel with the same `protocol` and `id`.
|
||||
|
||||
__NOTE__: `mux.open` returns `null` if the session should not be opened, ie it's a duplicate session or the remote has already closed this one.
|
||||
__NOTE__: `mux.createChannel` returns `null` if the channel should not be opened, ie it's a duplicate channel or the remote has already closed this one.
|
||||
|
||||
If you want multiple sessions with the same `protocol` and `id`, set `unique: false` as an option.
|
||||
|
||||
#### `const m = session.addMessage(opts)`
|
||||
#### `channel.open([handshake])`
|
||||
|
||||
Open the channel.
|
||||
|
||||
#### `const m = channel.addMessage(opts)`
|
||||
|
||||
Add a message. Options include:
|
||||
|
||||
|
@ -128,25 +139,25 @@ Function that is called when a message arrives.
|
|||
|
||||
The encoding for this message.
|
||||
|
||||
#### `session.close()`
|
||||
#### `channel.close()`
|
||||
|
||||
Closes the protocol session.
|
||||
Closes the protocol channel.
|
||||
|
||||
#### `sessoin.cork()`
|
||||
#### `channel.cork()`
|
||||
|
||||
Corking the protocol session, makes it buffer messages and send them all in a batch when it uncorks.
|
||||
Corking the protocol channel, makes it buffer messages and send them all in a batch when it uncorks.
|
||||
|
||||
#### `session.uncork()`
|
||||
#### `channel.uncork()`
|
||||
|
||||
Uncork and send the batch.
|
||||
|
||||
#### `mux.cork()`
|
||||
|
||||
Same as `session.cork` but on the muxer instance.
|
||||
Same as `channel.cork` but on the muxer instance.
|
||||
|
||||
#### `mux.uncork()`
|
||||
|
||||
Same as `session.uncork` but on the muxer instance.
|
||||
Same as `channel.uncork` but on the muxer instance.
|
||||
|
||||
## License
|
||||
|
||||
|
|
79
index.js
79
index.js
|
@ -6,13 +6,13 @@ const safetyCatch = require('safety-catch')
|
|||
const MAX_BUFFERED = 32768
|
||||
const MAX_BACKLOG = Infinity // TODO: impl "open" backpressure
|
||||
|
||||
class Session {
|
||||
constructor (mux, info, context, protocol, id, messages, onopen, onclose, ondestroy) {
|
||||
this.context = context
|
||||
class Channel {
|
||||
constructor (mux, info, userData, protocol, id, handshake, messages, onopen, onclose, ondestroy) {
|
||||
this.userData = userData
|
||||
this.protocol = protocol
|
||||
this.id = id
|
||||
this.handshake = null
|
||||
this.messages = []
|
||||
this.remoteMessages = this.messages
|
||||
|
||||
this.opened = false
|
||||
this.closed = false
|
||||
|
@ -22,6 +22,7 @@ class Session {
|
|||
this.onclose = onclose
|
||||
this.ondestroy = ondestroy
|
||||
|
||||
this._handshake = handshake
|
||||
this._mux = mux
|
||||
this._info = info
|
||||
this._localId = 0
|
||||
|
@ -35,7 +36,7 @@ class Session {
|
|||
for (const m of messages) this.addMessage(m)
|
||||
}
|
||||
|
||||
_open () {
|
||||
open (handshake) {
|
||||
const id = this._mux._free.length > 0
|
||||
? this._mux._free.pop()
|
||||
: this._mux._local.push(null) - 1
|
||||
|
@ -44,19 +45,25 @@ class Session {
|
|||
this._localId = id + 1
|
||||
this._mux._local[id] = this
|
||||
|
||||
if (this._remoteId === 0) {
|
||||
this._info.outgoing.push(this._localId)
|
||||
}
|
||||
|
||||
const state = { buffer: null, start: 2, end: 2 }
|
||||
|
||||
c.uint.preencode(state, this._localId)
|
||||
c.string.preencode(state, this.protocol)
|
||||
c.buffer.preencode(state, this.id)
|
||||
c.uint.preencode(state, this._localId)
|
||||
if (this._handshake) this._handshake.preencode(state, handshake)
|
||||
|
||||
state.buffer = this._mux._alloc(state.end)
|
||||
|
||||
state.buffer[0] = 0
|
||||
state.buffer[1] = 1
|
||||
c.uint.encode(state, this._localId)
|
||||
c.string.encode(state, this.protocol)
|
||||
c.buffer.encode(state, this.id)
|
||||
c.uint.encode(state, this._localId)
|
||||
if (this._handshake) this._handshake.encode(state, handshake)
|
||||
|
||||
this._mux._write0(state.buffer)
|
||||
}
|
||||
|
@ -81,9 +88,11 @@ class Session {
|
|||
const remote = this._mux._remote[this._remoteId - 1]
|
||||
|
||||
this.opened = true
|
||||
this._track(this.onopen(this))
|
||||
this.handshake = this._handshake ? this._handshake.decode(remote.state) : null
|
||||
this._track(this.onopen(this.handshake, this))
|
||||
|
||||
remote.session = this
|
||||
remote.state = null
|
||||
if (remote.pending !== null) this._drain(remote)
|
||||
}
|
||||
|
||||
|
@ -135,8 +144,8 @@ class Session {
|
|||
}
|
||||
|
||||
_recv (type, state) {
|
||||
if (type < this.remoteMessages.length) {
|
||||
this.remoteMessages[type].recv(state, this)
|
||||
if (type < this.messages.length) {
|
||||
this.messages[type].recv(state, this)
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -302,17 +311,14 @@ module.exports = class Protomux {
|
|||
return info ? info.opened > 0 : false
|
||||
}
|
||||
|
||||
open ({ context = null, protocol, id = null, unique = true, messages = [], onopen = noop, onclose = noop, ondestroy = noop }) {
|
||||
createChannel ({ userData = null, protocol, id = null, unique = true, handshake = null, messages = [], onopen = noop, onclose = noop, ondestroy = noop }) {
|
||||
if (this.stream.destroyed) return null
|
||||
|
||||
const info = this._get(protocol, id)
|
||||
if (unique && info.opened > 0) return null
|
||||
|
||||
if (info.incoming.length === 0) {
|
||||
const session = new Session(this, info, context, protocol, id, messages, onopen, onclose, ondestroy)
|
||||
session._open()
|
||||
info.outgoing.push(session._localId)
|
||||
return session
|
||||
return new Channel(this, info, userData, protocol, id, handshake, messages, onopen, onclose, ondestroy)
|
||||
}
|
||||
|
||||
this._remoteBacklog--
|
||||
|
@ -321,10 +327,9 @@ module.exports = class Protomux {
|
|||
const r = this._remote[remoteId - 1]
|
||||
if (r === null) return null
|
||||
|
||||
const session = new Session(this, info, context, protocol, id, messages, onopen, onclose, ondestroy)
|
||||
const session = new Channel(this, info, userData, protocol, id, handshake, messages, onopen, onclose, ondestroy)
|
||||
|
||||
session._remoteId = remoteId
|
||||
session._open()
|
||||
session._fullyOpenSoon()
|
||||
|
||||
return session
|
||||
|
@ -465,9 +470,9 @@ module.exports = class Protomux {
|
|||
}
|
||||
|
||||
_onopensession (state) {
|
||||
const remoteId = c.uint.decode(state)
|
||||
const protocol = c.string.decode(state)
|
||||
const id = c.buffer.decode(state)
|
||||
const remoteId = c.uint.decode(state)
|
||||
|
||||
// remote tried to open the control session - auto reject for now
|
||||
// as we can use as an explicit control protocol declaration if we need to
|
||||
|
@ -497,14 +502,14 @@ module.exports = class Protomux {
|
|||
return
|
||||
}
|
||||
|
||||
this._remote[rid] = { pending: null, session: null }
|
||||
this._remote[rid] = { state, pending: null, session: null }
|
||||
|
||||
session._remoteId = remoteId
|
||||
session._fullyOpen()
|
||||
return
|
||||
}
|
||||
|
||||
this._remote[rid] = { pending: [], session: null }
|
||||
this._remote[rid] = { state, pending: [], session: null }
|
||||
|
||||
if (++this._remoteBacklog > MAX_BACKLOG) {
|
||||
throw new Error('Remote exceeded backlog')
|
||||
|
@ -517,19 +522,25 @@ module.exports = class Protomux {
|
|||
}
|
||||
|
||||
_onrejectsession (state) {
|
||||
const protocol = c.string.decode(state)
|
||||
const id = c.buffer.decode(state)
|
||||
const info = this._get(protocol, id)
|
||||
const localId = c.uint.decode(state)
|
||||
|
||||
if (info.outgoing.length === 0) {
|
||||
throw new Error('Invalid reject message')
|
||||
// TODO: can be done smarter...
|
||||
for (const info of this._infos.values()) {
|
||||
const i = info.outgoing.indexOf(localId)
|
||||
if (i === -1) continue
|
||||
|
||||
info.outgoing.splice(i, 1)
|
||||
|
||||
const session = this._local[localId - 1]
|
||||
|
||||
this._free.push(localId - 1)
|
||||
if (session !== null) session._close(true)
|
||||
|
||||
this._gc(info)
|
||||
return
|
||||
}
|
||||
|
||||
const localId = info.outgoing.shift()
|
||||
const session = this._local[localId - 1]
|
||||
|
||||
this._free.push(localId - 1)
|
||||
if (session !== null) session._close(true)
|
||||
throw new Error('Invalid reject message')
|
||||
}
|
||||
|
||||
_onclosesession (state) {
|
||||
|
@ -553,7 +564,7 @@ module.exports = class Protomux {
|
|||
if (--info.pairing > 0) return
|
||||
|
||||
while (info.incoming.length > 0) {
|
||||
this._rejectSession(info, info.incoming.pop())
|
||||
this._rejectSession(info, info.incoming.shift())
|
||||
}
|
||||
|
||||
this._gc(info)
|
||||
|
@ -575,15 +586,13 @@ module.exports = class Protomux {
|
|||
|
||||
const state = { buffer: null, start: 2, end: 2 }
|
||||
|
||||
c.string.preencode(state, info.protocol)
|
||||
c.buffer.preencode(state, info.id)
|
||||
c.uint.preencode(state, remoteId)
|
||||
|
||||
state.buffer = this._alloc(state.end)
|
||||
|
||||
state.buffer[0] = 0
|
||||
state.buffer[1] = 2
|
||||
c.string.encode(state, info.protocol)
|
||||
c.buffer.encode(state, info.id)
|
||||
c.uint.encode(state, remoteId)
|
||||
|
||||
this._write0(state.buffer)
|
||||
}
|
||||
|
|
119
test.js
119
test.js
|
@ -9,13 +9,15 @@ test('basic', function (t) {
|
|||
|
||||
replicate(a, b)
|
||||
|
||||
const p = a.open({
|
||||
const p = a.createChannel({
|
||||
protocol: 'foo',
|
||||
onopen () {
|
||||
t.pass('a remote opened')
|
||||
}
|
||||
})
|
||||
|
||||
p.open()
|
||||
|
||||
p.addMessage({
|
||||
encoding: c.string,
|
||||
onmessage (message) {
|
||||
|
@ -23,12 +25,13 @@ test('basic', function (t) {
|
|||
}
|
||||
})
|
||||
|
||||
const bp = b.open({
|
||||
const bp = b.createChannel({
|
||||
protocol: 'foo'
|
||||
})
|
||||
|
||||
t.plan(2)
|
||||
|
||||
bp.open()
|
||||
bp.addMessage({ encoding: c.string }).send('hello world')
|
||||
})
|
||||
|
||||
|
@ -38,10 +41,12 @@ test('echo message', function (t) {
|
|||
|
||||
replicate(a, b)
|
||||
|
||||
const ap = a.open({
|
||||
const ap = a.createChannel({
|
||||
protocol: 'foo'
|
||||
})
|
||||
|
||||
ap.open()
|
||||
|
||||
const aEcho = ap.addMessage({
|
||||
encoding: c.string,
|
||||
onmessage (message) {
|
||||
|
@ -49,17 +54,19 @@ test('echo message', function (t) {
|
|||
}
|
||||
})
|
||||
|
||||
b.open({
|
||||
b.createChannel({
|
||||
protocol: 'other'
|
||||
})
|
||||
}).open()
|
||||
|
||||
const bp = b.open({
|
||||
const bp = b.createChannel({
|
||||
protocol: 'foo',
|
||||
onopen () {
|
||||
t.pass('b remote opened')
|
||||
}
|
||||
})
|
||||
|
||||
bp.open()
|
||||
|
||||
const bEcho = bp.addMessage({
|
||||
encoding: c.string,
|
||||
onmessage (message) {
|
||||
|
@ -75,24 +82,28 @@ test('echo message', function (t) {
|
|||
test('multi message', function (t) {
|
||||
const a = new Protomux(new SecretStream(true))
|
||||
|
||||
a.open({
|
||||
a.createChannel({
|
||||
protocol: 'other'
|
||||
})
|
||||
}).open()
|
||||
|
||||
const ap = a.open({
|
||||
const ap = a.createChannel({
|
||||
protocol: 'multi'
|
||||
})
|
||||
|
||||
ap.open()
|
||||
|
||||
const a1 = ap.addMessage({ encoding: c.int })
|
||||
const a2 = ap.addMessage({ encoding: c.string })
|
||||
const a3 = ap.addMessage({ encoding: c.string })
|
||||
|
||||
const b = new Protomux(new SecretStream(false))
|
||||
|
||||
const bp = b.open({
|
||||
const bp = b.createChannel({
|
||||
protocol: 'multi'
|
||||
})
|
||||
|
||||
bp.open()
|
||||
|
||||
const b1 = bp.addMessage({ encoding: c.int })
|
||||
const b2 = bp.addMessage({ encoding: c.string })
|
||||
|
||||
|
@ -123,23 +134,27 @@ test('corks', function (t) {
|
|||
|
||||
a.cork()
|
||||
|
||||
a.open({
|
||||
a.createChannel({
|
||||
protocol: 'other'
|
||||
})
|
||||
}).open()
|
||||
|
||||
const ap = a.open({
|
||||
const ap = a.createChannel({
|
||||
protocol: 'multi'
|
||||
})
|
||||
|
||||
ap.open()
|
||||
|
||||
const a1 = ap.addMessage({ encoding: c.int })
|
||||
const a2 = ap.addMessage({ encoding: c.string })
|
||||
|
||||
const b = new Protomux(new SecretStream(false))
|
||||
|
||||
const bp = b.open({
|
||||
const bp = b.createChannel({
|
||||
protocol: 'multi'
|
||||
})
|
||||
|
||||
bp.open()
|
||||
|
||||
const b1 = bp.addMessage({ encoding: c.int })
|
||||
const b2 = bp.addMessage({ encoding: c.string })
|
||||
|
||||
|
@ -174,6 +189,82 @@ test('corks', function (t) {
|
|||
}
|
||||
})
|
||||
|
||||
test('handshake', function (t) {
|
||||
const a = new Protomux(new SecretStream(true))
|
||||
const b = new Protomux(new SecretStream(false))
|
||||
|
||||
replicate(a, b)
|
||||
|
||||
const p = a.createChannel({
|
||||
protocol: 'foo',
|
||||
handshake: c.string,
|
||||
onopen (handshake) {
|
||||
t.is(handshake, 'b handshake')
|
||||
}
|
||||
})
|
||||
|
||||
p.open('a handshake')
|
||||
|
||||
const bp = b.createChannel({
|
||||
protocol: 'foo',
|
||||
handshake: c.string,
|
||||
onopen (handshake) {
|
||||
t.is(handshake, 'a handshake')
|
||||
}
|
||||
})
|
||||
|
||||
t.plan(2)
|
||||
|
||||
bp.open('b handshake')
|
||||
})
|
||||
|
||||
test('rejections', function (t) {
|
||||
t.plan(1)
|
||||
|
||||
const a = new Protomux(new SecretStream(true))
|
||||
const b = new Protomux(new SecretStream(false))
|
||||
|
||||
replicate(a, b)
|
||||
|
||||
let closed = 0
|
||||
for (let i = 0; i < 10; i++) {
|
||||
const p = a.createChannel({
|
||||
protocol: 'foo#' + i,
|
||||
onclose () {
|
||||
closed++
|
||||
if (closed === 10) t.pass('all closed')
|
||||
}
|
||||
})
|
||||
|
||||
p.open()
|
||||
}
|
||||
})
|
||||
|
||||
test('pipeline close and rejections', function (t) {
|
||||
t.plan(1)
|
||||
|
||||
const a = new Protomux(new SecretStream(true))
|
||||
const b = new Protomux(new SecretStream(false))
|
||||
|
||||
replicate(a, b)
|
||||
|
||||
let closed = 0
|
||||
for (let i = 0; i < 10; i++) {
|
||||
const p = a.createChannel({
|
||||
protocol: 'foo#' + i,
|
||||
onclose () {
|
||||
closed++
|
||||
if (closed === 10) {
|
||||
t.pass('all closed')
|
||||
}
|
||||
}
|
||||
})
|
||||
|
||||
p.open()
|
||||
p.close()
|
||||
}
|
||||
})
|
||||
|
||||
function replicate (a, b) {
|
||||
a.stream.rawStream.pipe(b.stream.rawStream).pipe(a.stream.rawStream)
|
||||
}
|
||||
|
|
Reference in New Issue