mirror of
https://github.com/ilyakooo0/urbit.git
synced 2024-12-20 21:31:32 +03:00
0bee77ce8e
Uses Zuse's previously unused +harden helper function to streamline +task unwrapping in vanes. (Arguably, in landlocked vanes like Ford, we should crash if we get a %soft task, since no events should be coming in directly from the outside.)
401 lines
10 KiB
Plaintext
401 lines
10 KiB
Plaintext
!:
|
|
:: http-client
|
|
::
|
|
|= pit=vase
|
|
=, iris
|
|
::
|
|
::
|
|
:: internal data structures
|
|
::
|
|
=> =~
|
|
::
|
|
:: internal data structures that won't go in zuse
|
|
::
|
|
|%
|
|
+$ move
|
|
::
|
|
$: :: duct: request identifier
|
|
::
|
|
=duct
|
|
::
|
|
::
|
|
card=(wind note gift:able)
|
|
==
|
|
:: +note: private request from light to another vane
|
|
::
|
|
+$ note
|
|
$% :: %d: to dill
|
|
::
|
|
$: %d
|
|
::
|
|
::
|
|
$% [%flog =flog:dill]
|
|
== == ==
|
|
--
|
|
:: more structures
|
|
::
|
|
|%
|
|
+$ axle
|
|
$: :: date: date at which light's state was updated to this data structure
|
|
::
|
|
date=%~2019.2.8
|
|
::
|
|
::
|
|
=state
|
|
==
|
|
:: +state:client: state relating to open outbound HTTP connections
|
|
::
|
|
+$ state
|
|
$: :: next-id: monotonically increasing id number for the next connection
|
|
::
|
|
next-id=@ud
|
|
:: connection-by-id: open connections to the
|
|
::
|
|
connection-by-id=(map @ud [=duct =in-progress-http-request])
|
|
:: connection-by-duct: used for cancellation
|
|
::
|
|
connection-by-duct=(map duct @ud)
|
|
:: outbound-duct: the duct to send outbound requests on
|
|
::
|
|
outbound-duct=duct
|
|
==
|
|
:: +in-progress-http-request: state around an outbound http
|
|
::
|
|
+$ in-progress-http-request
|
|
$: :: remaining-redirects: http limit of number of redirects before error
|
|
::
|
|
remaining-redirects=@ud
|
|
:: remaining-retries: number of times to retry the request
|
|
::
|
|
remaining-retries=@ud
|
|
:: response-header: the response headers from the %start packet
|
|
::
|
|
:: We send the response headers with each %http-progress, so we must
|
|
:: save them.
|
|
::
|
|
response-header=(unit response-header:http)
|
|
:: chunks: a list of partial results returned from unix
|
|
::
|
|
:: This list of octs must be flopped before it is composed as the
|
|
:: final response, as we want to be able to quickly insert.
|
|
::
|
|
chunks=(list octs)
|
|
:: bytes-read: the sum of the size of the :chunks
|
|
::
|
|
bytes-read=@ud
|
|
:: expected-size: the expected content-length of the http request
|
|
::
|
|
expected-size=(unit @ud)
|
|
==
|
|
--
|
|
::
|
|
|%
|
|
:: +combine-octs: combine multiple octs into one
|
|
::
|
|
++ combine-octs
|
|
|= a=(list octs)
|
|
^- octs
|
|
:- %+ roll a
|
|
|= [=octs sum=@ud]
|
|
(add sum p.octs)
|
|
(can 3 a)
|
|
:: +per-client-event: per-event client core
|
|
::
|
|
++ per-client-event
|
|
|= [[our=@p eny=@ =duct now=@da scry=sley] =state]
|
|
|%
|
|
:: +request: makes an external web request
|
|
::
|
|
++ request
|
|
|= [=request:http =outbound-config]
|
|
^- [(list move) ^state]
|
|
:: if there's already a request on this duct, abort
|
|
::
|
|
?: (~(has by connection-by-duct.state) duct)
|
|
~& %cant-send-second-http-client-request-on-same-duct
|
|
[~ state]
|
|
:: get the next id for this request
|
|
::
|
|
=^ id next-id.state [next-id.state +(next-id.state)]
|
|
:: add a new open session
|
|
::
|
|
=. connection-by-id.state
|
|
%+ ~(put by connection-by-id.state) id
|
|
=, outbound-config
|
|
[duct [redirects retries ~ ~ 0 ~]]
|
|
:: keep track of the duct for cancellation
|
|
::
|
|
=. connection-by-duct.state
|
|
(~(put by connection-by-duct.state) duct id)
|
|
:: start the download
|
|
::
|
|
:: the original eyre keeps track of the duct on %born and then sends a
|
|
:: %give on that duct. this seems like a weird inversion of
|
|
:: responsibility, where we should instead be doing a pass to unix. the
|
|
:: reason we need to manually build ids is because we aren't using the
|
|
:: built in duct system.
|
|
::
|
|
:: email discussions make it sound like fixing that might be hard, so
|
|
:: maybe i should just live with the way it is now?
|
|
::
|
|
:- [outbound-duct.state %give %request id request]~
|
|
state
|
|
:: +cancel: client cancels an outstanding request
|
|
::
|
|
++ cancel
|
|
^- [(list move) ^state]
|
|
::
|
|
?~ cancel-id=(~(get by connection-by-duct.state) duct)
|
|
~& %iris-invalid-cancel
|
|
[~ state]
|
|
::
|
|
:- [outbound-duct.state %give %cancel-request u.cancel-id]~
|
|
(cleanup-connection u.cancel-id)
|
|
:: +receive: receives a response to an http-request we made
|
|
::
|
|
:: TODO: Right now, we are not following redirect and not handling retries
|
|
:: correctly. We need to do this.
|
|
::
|
|
++ receive
|
|
|= [id=@ud =http-event:http]
|
|
^- [(list move) ^state]
|
|
:: ensure that this is a valid receive
|
|
::
|
|
?~ connection=(~(get by connection-by-id.state) id)
|
|
~& [%eyre-unknown-receive id]
|
|
[~ state]
|
|
::
|
|
?- -.http-event
|
|
%start
|
|
:: TODO: Handle redirects and retries here, before we start dispatching
|
|
:: back to the application.
|
|
::
|
|
:: record data from the http response that only comes from %start
|
|
::
|
|
=. connection-by-id.state
|
|
%+ ~(jab by connection-by-id.state) id
|
|
|= [duct=^duct =in-progress-http-request]
|
|
::
|
|
=. expected-size.in-progress-http-request
|
|
?~ str=(get-header:http 'content-length' headers.response-header.http-event)
|
|
~
|
|
::
|
|
(rush u.str dum:ag)
|
|
::
|
|
=. response-header.in-progress-http-request
|
|
`response-header:http-event
|
|
::
|
|
[duct in-progress-http-request]
|
|
::
|
|
?: complete.http-event
|
|
(send-finished id data.http-event)
|
|
::
|
|
(record-and-send-progress id data.http-event)
|
|
::
|
|
%continue
|
|
?: complete.http-event
|
|
(send-finished id data.http-event)
|
|
::
|
|
(record-and-send-progress id data.http-event)
|
|
::
|
|
%cancel
|
|
:: we have received a cancel from outside; pass it on to our requester
|
|
::
|
|
:_ (cleanup-connection id)
|
|
^- (list move)
|
|
:_ ~
|
|
:* duct.u.connection
|
|
%give
|
|
%http-response
|
|
%cancel
|
|
~
|
|
==
|
|
==
|
|
:: +record-and-send-progress: save incoming data and send progress report
|
|
::
|
|
++ record-and-send-progress
|
|
|= [id=@ud data=(unit octs)]
|
|
^- [(list move) ^state]
|
|
::
|
|
=. connection-by-id.state
|
|
%+ ~(jab by connection-by-id.state) id
|
|
|= [duct=^duct =in-progress-http-request]
|
|
:: record the data chunk and size, if it exists
|
|
::
|
|
=? chunks.in-progress-http-request
|
|
?=(^ data)
|
|
[u.data chunks.in-progress-http-request]
|
|
=? bytes-read.in-progress-http-request
|
|
?=(^ data)
|
|
(add bytes-read.in-progress-http-request p.u.data)
|
|
::
|
|
[duct in-progress-http-request]
|
|
::
|
|
=/ connection (~(got by connection-by-id.state) id)
|
|
:_ state
|
|
^- (list move)
|
|
:_ ~
|
|
:* duct.connection
|
|
%give
|
|
%http-response
|
|
%progress
|
|
(need response-header.in-progress-http-request.connection)
|
|
bytes-read.in-progress-http-request.connection
|
|
expected-size.in-progress-http-request.connection
|
|
data
|
|
==
|
|
:: +send-finished: sends the %finished, cleans up the session state
|
|
::
|
|
++ send-finished
|
|
|= [id=@ud data=(unit octs)]
|
|
^- [(list move) ^state]
|
|
::
|
|
=/ connection (~(got by connection-by-id.state) id)
|
|
:: reassemble the octs that we've received into their final form
|
|
::
|
|
=/ data=octs
|
|
%- combine-octs
|
|
%- flop
|
|
::
|
|
?~ data
|
|
chunks.in-progress-http-request.connection
|
|
[u.data chunks.in-progress-http-request.connection]
|
|
::
|
|
=/ response-header=response-header:http
|
|
(need response-header.in-progress-http-request.connection)
|
|
::
|
|
=/ mime=@t
|
|
?~ mime-type=(get-header:http 'content-type' headers.response-header)
|
|
'application/octet-stream'
|
|
u.mime-type
|
|
::
|
|
:_ (cleanup-connection id)
|
|
:~ :* duct.connection
|
|
%give
|
|
%http-response
|
|
%finished
|
|
response-header
|
|
?:(=(0 p.data) ~ `[mime data])
|
|
== ==
|
|
::
|
|
++ cleanup-connection
|
|
|= id=@ud
|
|
^- ^state
|
|
?~ con=(~(get by connection-by-id.state) id)
|
|
state
|
|
%_ state
|
|
connection-by-id (~(del by connection-by-id.state) id)
|
|
connection-by-duct (~(del by connection-by-duct.state) duct.u.con)
|
|
==
|
|
--
|
|
--
|
|
:: end the =~
|
|
::
|
|
. ==
|
|
:: begin with a default +axle as a blank slate
|
|
::
|
|
=| ax=axle
|
|
:: a vane is activated with current date, entropy, and a namespace function
|
|
::
|
|
|= [our=ship now=@da eny=@uvJ scry-gate=sley]
|
|
:: allow jets to be registered within this core
|
|
::
|
|
~% %http-client ..is ~
|
|
|%
|
|
++ call
|
|
|= [=duct type=* wrapped-task=(hobo task:able)]
|
|
^- [(list move) _light-gate]
|
|
::
|
|
=/ task=task:able ((harden task:able) wrapped-task)
|
|
:: %crud: notifies us of an event failure
|
|
::
|
|
?: ?=(%crud -.task)
|
|
=/ moves=(list move)
|
|
[[duct %slip %d %flog task] ~]
|
|
[moves light-gate]
|
|
:: %trim: in response to memory pressure
|
|
::
|
|
?: ?=(%trim -.task)
|
|
[~ light-gate]
|
|
:: %vega: notifies us of a completed kernel upgrade
|
|
::
|
|
?: ?=(%vega -.task)
|
|
[~ light-gate]
|
|
::
|
|
=/ event-args [[our eny duct now scry-gate] state.ax]
|
|
=/ client (per-client-event event-args)
|
|
?- -.task
|
|
::
|
|
%born
|
|
:: create a cancel for each outstanding connection
|
|
::
|
|
:: TODO: We should gracefully retry on restart instead of just sending a
|
|
:: cancel.
|
|
::
|
|
=/ moves=(list move)
|
|
%+ turn ~(tap by connection-by-duct.state.ax)
|
|
|= [=^duct @ud]
|
|
^- move
|
|
[duct %give %http-response %cancel ~]
|
|
:: reset all connection state on born
|
|
::
|
|
=: next-id.state.ax 0
|
|
connection-by-id.state.ax ~
|
|
connection-by-duct.state.ax ~
|
|
outbound-duct.state.ax duct
|
|
==
|
|
::
|
|
[moves light-gate]
|
|
::
|
|
%request
|
|
=^ moves state.ax (request:client +.task)
|
|
[moves light-gate]
|
|
::
|
|
%cancel-request
|
|
=^ moves state.ax cancel:client
|
|
[moves light-gate]
|
|
::
|
|
%receive
|
|
=^ moves state.ax (receive:client +.task)
|
|
[moves light-gate]
|
|
::
|
|
%wegh
|
|
:_ light-gate
|
|
:~ :* duct
|
|
%give
|
|
%mass
|
|
^- mass
|
|
:+ %iris %|
|
|
:~ nex+&+next-id.state.ax
|
|
outbound+&+outbound-duct.state.ax
|
|
by-id+&+connection-by-id.state.ax
|
|
by-duct+&+connection-by-duct.state.ax
|
|
axle+&+ax
|
|
== == ==
|
|
==
|
|
:: http-client issues no requests to other vanes
|
|
::
|
|
++ take
|
|
|= [=wire =duct wrapped-sign=*]
|
|
^- [(list move) _light-gate]
|
|
!!
|
|
::
|
|
++ light-gate ..$
|
|
:: +load: migrate old state to new state (called on vane reload)
|
|
::
|
|
++ load
|
|
|= old=axle
|
|
^+ ..^$
|
|
::
|
|
~! %loading
|
|
..^$(ax old)
|
|
:: +stay: produce current state
|
|
::
|
|
++ stay `axle`ax
|
|
:: +scry: request a path in the urbit namespace
|
|
::
|
|
++ scry
|
|
|= *
|
|
[~ ~]
|
|
--
|