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Lorenzo Venerandi 2024-12-06 00:30:02 +01:00
parent 90c958a537
commit 71cda0e82c
24 changed files with 3475 additions and 1 deletions
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.gitignore vendored Normal file
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gen/*
build/*

38
README.md
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# go-nats-client # HTTP Hello World
This is a simple TinyGo Wasm example that responds with a "Hello World" message for each request.
## Prerequisites
- `go` 1.23
- `tinygo` 0.33
- [`wash`](https://wasmcloud.com/docs/installation) 0.35.0
- `wasmtime` 25.0.0 (if running with wasmtime)
## Building
```bash
wash build
```
## Running with wasmtime
You must have wasmtime 25.0.0 for this to work. Make sure to follow the build step above first.
```bash
wasmtime serve -Scommon ./build/http_hello_world_s.wasm
```
## Running with wasmCloud
Make sure to follow the build steps above, and replace the file path in [the wadm manifest](./wadm.yaml) with the absolute path to your local built component.
```shell
wash up -d
wash app deploy ./wadm.yaml
curl http://localhost:8000
```
## Adding Capabilities
To learn how to extend this example with additional capabilities, see the [Adding Capabilities](https://wasmcloud.com/docs/tour/adding-capabilities?lang=tinygo) section of the wasmCloud documentation.

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module gitea.rebus.ninja/lore/go-nats-client
go 1.23.0
require (
github.com/bytecodealliance/wasm-tools-go v0.3.1
go.wasmcloud.dev/component v0.0.4
go.wasmcloud.dev/wadge v0.7.0
)
require (
github.com/coreos/go-semver v0.3.1 // indirect
github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 // indirect
github.com/klauspost/compress v1.17.9 // indirect
github.com/opencontainers/go-digest v1.0.0 // indirect
github.com/regclient/regclient v0.7.1 // indirect
github.com/sirupsen/logrus v1.9.3 // indirect
github.com/ulikunitz/xz v0.5.12 // indirect
github.com/urfave/cli/v3 v3.0.0-alpha9.2 // indirect
golang.org/x/mod v0.21.0 // indirect
golang.org/x/sync v0.8.0 // indirect
golang.org/x/sys v0.26.0 // indirect
golang.org/x/tools v0.26.0 // indirect
)

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github.com/bytecodealliance/wasm-tools-go v0.3.1 h1:9Q9PjSzkbiVmkUvZ7nYCfJ02mcQDBalxycA3s8g7kR4=
github.com/bytecodealliance/wasm-tools-go v0.3.1/go.mod h1:vNAQ8DAEp6xvvk+TUHah5DslLEa76f4H6e737OeaxuY=
github.com/coreos/go-semver v0.3.1 h1:yi21YpKnrx1gt5R+la8n5WgS0kCrsPp33dmEyHReZr4=
github.com/coreos/go-semver v0.3.1/go.mod h1:irMmmIw/7yzSRPWryHsK7EYSg09caPQL03VsM8rvUec=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 h1:UhxFibDNY/bfvqU5CAUmr9zpesgbU6SWc8/B4mflAE4=
github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7/go.mod h1:cyGadeNEkKy96OOhEzfZl+yxihPEzKnqJwvfuSUqbZE=
github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
github.com/olareg/olareg v0.1.0 h1:1dXBOgPrig5N7zoXyIZVQqU0QBo6sD9pbL6UYjY75CA=
github.com/olareg/olareg v0.1.0/go.mod h1:RBuU7JW7SoIIxZKzLRhq8sVtQeAHzCAtRrXEBx2KlM4=
github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/regclient/regclient v0.7.1 h1:qEsJrTmZd98fZKjueAbrZCSNGU+ifnr6xjlSAs3WOPs=
github.com/regclient/regclient v0.7.1/go.mod h1:+w/BFtJuw0h0nzIw/z2+1FuA2/dVXBzDq4rYmziJpMc=
github.com/sergi/go-diff v1.3.1 h1:xkr+Oxo4BOQKmkn/B9eMK0g5Kg/983T9DqqPHwYqD+8=
github.com/sergi/go-diff v1.3.1/go.mod h1:aMJSSKb2lpPvRNec0+w3fl7LP9IOFzdc9Pa4NFbPK1I=
github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
github.com/ulikunitz/xz v0.5.12 h1:37Nm15o69RwBkXM0J6A5OlE67RZTfzUxTj8fB3dfcsc=
github.com/ulikunitz/xz v0.5.12/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0oWt/14=
github.com/urfave/cli/v3 v3.0.0-alpha9.2 h1:CL8llQj3dGRLVQQzHxS+ZYRLanOuhyK1fXgLKD+qV+Y=
github.com/urfave/cli/v3 v3.0.0-alpha9.2/go.mod h1:FnIeEMYu+ko8zP1F9Ypr3xkZMIDqW3DR92yUtY39q1Y=
go.wasmcloud.dev/component v0.0.4 h1:CyqSV38sAOjYcXS6kkOIhQaDgXATHmd2gZlU7ghfUj4=
go.wasmcloud.dev/component v0.0.4/go.mod h1:EaPCl4TKNruOQ/hk/3lBTLGzpdE6R1Ju9g52ZzJQgh0=
go.wasmcloud.dev/wadge v0.7.0 h1:eUt0jODh6xQ5HEof1PFSgDp+evrNs+lD1LYCYeRR2Cg=
go.wasmcloud.dev/wadge v0.7.0/go.mod h1:SMnPSWZFTkXyUX0GJ11mcdc7ZoMITtbAlPLlpvGJd4M=
golang.org/x/mod v0.21.0 h1:vvrHzRwRfVKSiLrG+d4FMl/Qi4ukBCE6kZlTUkDYRT0=
golang.org/x/mod v0.21.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/tools v0.26.0 h1:v/60pFQmzmT9ExmjDv2gGIfi3OqfKoEP6I5+umXlbnQ=
golang.org/x/tools v0.26.0/go.mod h1:TPVVj70c7JJ3WCazhD8OdXcZg/og+b9+tH/KxylGwH0=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

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//go:generate go run github.com/bytecodealliance/wasm-tools-go/cmd/wit-bindgen-go generate --world hello --out gen ./wit
package main
import (
"fmt"
"net/http"
"go.wasmcloud.dev/component/net/wasihttp"
)
func init() {
wasihttp.HandleFunc(handleRequest)
}
func handleRequest(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Hello from Go!\n")
}
// Since we don't run this program like a CLI, the `main` function is empty. Instead,
// we call the `handleRequest` function when an HTTP request is received.
func main() {}

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//go:generate go run go.wasmcloud.dev/wadge/cmd/wadge-bindgen-go
package main
import (
"bytes"
"io"
"log"
"log/slog"
"net/http"
"os"
"testing"
incominghandler "go.wasmcloud.dev/component/gen/wasi/http/incoming-handler"
"go.wasmcloud.dev/wadge"
"go.wasmcloud.dev/wadge/wadgehttp"
)
func init() {
log.SetFlags(0)
slog.SetDefault(slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{
Level: slog.LevelDebug, ReplaceAttr: func(groups []string, a slog.Attr) slog.Attr {
if a.Key == slog.TimeKey {
return slog.Attr{}
}
return a
},
})))
}
func TestIncomingHandler(t *testing.T) {
wadge.RunTest(t, func() {
req, err := http.NewRequest("", "/", nil)
if err != nil {
t.Fatalf("failed to create new HTTP request: %s", err)
}
resp, err := wadgehttp.HandleIncomingRequest(incominghandler.Exports.Handle, req)
if err != nil {
t.Fatalf("failed to handle incoming HTTP request: %s", err)
}
if want, got := http.StatusOK, resp.StatusCode; want != got {
t.Fatalf("unexpected status code: want %d, got %d", want, got)
}
buf, err := io.ReadAll(resp.Body)
if err != nil {
t.Fatalf("failed to read HTTP response body: %s", err)
}
defer resp.Body.Close()
if want, got := []byte("Hello from Go!\n"), buf; !bytes.Equal(want, got) {
t.Fatalf("unexpected response body: want %q, got %q", want, got)
}
})
}

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//go:build tools
package main
import (
_ "github.com/bytecodealliance/wasm-tools-go/cmd/wit-bindgen-go"
_ "go.wasmcloud.dev/wadge/cmd/wadge-bindgen-go"
)

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apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
name: tinygo-hello-world
annotations:
description: 'HTTP hello world demo in Golang (TinyGo), using the WebAssembly Component Model and WebAssembly Interfaces Types (WIT)'
wasmcloud.dev/authors: wasmCloud team
wasmcloud.dev/source-url: https://github.com/wasmCloud/wasmCloud/blob/main/examples/golang/components/http-hello-world/wadm.yaml
wasmcloud.dev/readme-md-url: https://github.com/wasmCloud/wasmCloud/blob/main/examples/golang/components/http-hello-world/README.md
wasmcloud.dev/homepage: https://github.com/wasmCloud/wasmCloud/tree/main/examples/golang/components/http-hello-world
wasmcloud.dev/categories: |
http,outgoing-http,http-server,tinygo,golang,example
spec:
components:
- name: http-component
type: component
properties:
image: file://./build/http_hello_world_s.wasm
traits:
# Govern the spread/scheduling of the component
- type: spreadscaler
properties:
instances: 1
# Add a capability provider that enables HTTP access
- name: httpserver
type: capability
properties:
image: ghcr.io/wasmcloud/http-server:0.23.2
traits:
# Link the httpserver to the component, and configure the HTTP server
# to listen on port 8000 for incoming requests
#
# Since the HTTP server calls the `http-component` component, we establish
# a unidirectional link from this `httpserver` provider (the "source")
# to the `http-component` component (the "target"), so the server can invoke
# the component to handle a request.
- type: link
properties:
target: http-component
namespace: wasi
package: http
interfaces: [incoming-handler]
source_config:
- name: default-http
properties:
address: 127.0.0.1:8000

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# This file is automatically generated.
# It is not intended for manual editing.
version = 1
[[packages]]
name = "wasi:http"
registry = "wasi.dev"
[[packages.versions]]
requirement = "=0.2.0"
version = "0.2.0"
digest = "sha256:5a568e6e2d60c1ce51220e1833cdd5b88db9f615720edc762a9b4a6f36b383bd"
[[packages]]
name = "wasmcloud:component-go"
registry = "wasmcloud.com"
[[packages.versions]]
requirement = "=0.1.0"
version = "0.1.0"
digest = "sha256:de3e9af7dedd0d9e882f68f1bee533c7af9c6a1947eb40cbf1ef6163b7d41784"

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name = "http-hello-world"
language = "tinygo"
type = "component"
version = "0.1.0"
[component]
wit_world = "hello"
wasm_target = "wasm32-wasip2"
destination = "build/http_hello_world_s.wasm"

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wit/deps/wasi-cli-0.2.0/package.wit Normal file
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package wasi:cli@0.2.0;
interface stdout {
use wasi:io/streams@0.2.0.{output-stream};
get-stdout: func() -> output-stream;
}
interface stderr {
use wasi:io/streams@0.2.0.{output-stream};
get-stderr: func() -> output-stream;
}
interface stdin {
use wasi:io/streams@0.2.0.{input-stream};
get-stdin: func() -> input-stream;
}
interface environment {
get-environment: func() -> list<tuple<string, string>>;
get-arguments: func() -> list<string>;
initial-cwd: func() -> option<string>;
}
interface exit {
exit: func(status: result);
}
interface terminal-input {
resource terminal-input;
}
interface terminal-output {
resource terminal-output;
}
interface terminal-stdin {
use terminal-input.{terminal-input};
get-terminal-stdin: func() -> option<terminal-input>;
}
interface terminal-stdout {
use terminal-output.{terminal-output};
get-terminal-stdout: func() -> option<terminal-output>;
}
interface terminal-stderr {
use terminal-output.{terminal-output};
get-terminal-stderr: func() -> option<terminal-output>;
}

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package wasi:clocks@0.2.0;
interface monotonic-clock {
use wasi:io/poll@0.2.0.{pollable};
type instant = u64;
type duration = u64;
now: func() -> instant;
resolution: func() -> duration;
subscribe-instant: func(when: instant) -> pollable;
subscribe-duration: func(when: duration) -> pollable;
}
interface wall-clock {
record datetime {
seconds: u64,
nanoseconds: u32,
}
now: func() -> datetime;
resolution: func() -> datetime;
}

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package wasi:config@0.2.0-draft;
interface runtime {
variant config-error {
upstream(string),
io(string),
}
get: func(key: string) -> result<option<string>, config-error>;
get-all: func() -> result<list<tuple<string, string>>, config-error>;
}

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package wasi:filesystem@0.2.0;
interface types {
use wasi:io/streams@0.2.0.{input-stream, output-stream, error};
use wasi:clocks/wall-clock@0.2.0.{datetime};
type filesize = u64;
enum descriptor-type {
unknown,
block-device,
character-device,
directory,
fifo,
symbolic-link,
regular-file,
socket,
}
flags descriptor-flags {
read,
write,
file-integrity-sync,
data-integrity-sync,
requested-write-sync,
mutate-directory,
}
flags path-flags {
symlink-follow,
}
flags open-flags {
create,
directory,
exclusive,
truncate,
}
type link-count = u64;
record descriptor-stat {
%type: descriptor-type,
link-count: link-count,
size: filesize,
data-access-timestamp: option<datetime>,
data-modification-timestamp: option<datetime>,
status-change-timestamp: option<datetime>,
}
variant new-timestamp {
no-change,
now,
timestamp(datetime),
}
record directory-entry {
%type: descriptor-type,
name: string,
}
enum error-code {
access,
would-block,
already,
bad-descriptor,
busy,
deadlock,
quota,
exist,
file-too-large,
illegal-byte-sequence,
in-progress,
interrupted,
invalid,
io,
is-directory,
loop,
too-many-links,
message-size,
name-too-long,
no-device,
no-entry,
no-lock,
insufficient-memory,
insufficient-space,
not-directory,
not-empty,
not-recoverable,
unsupported,
no-tty,
no-such-device,
overflow,
not-permitted,
pipe,
read-only,
invalid-seek,
text-file-busy,
cross-device,
}
enum advice {
normal,
sequential,
random,
will-need,
dont-need,
no-reuse,
}
record metadata-hash-value {
lower: u64,
upper: u64,
}
resource descriptor {
read-via-stream: func(offset: filesize) -> result<input-stream, error-code>;
write-via-stream: func(offset: filesize) -> result<output-stream, error-code>;
append-via-stream: func() -> result<output-stream, error-code>;
advise: func(offset: filesize, length: filesize, advice: advice) -> result<_, error-code>;
sync-data: func() -> result<_, error-code>;
get-flags: func() -> result<descriptor-flags, error-code>;
get-type: func() -> result<descriptor-type, error-code>;
set-size: func(size: filesize) -> result<_, error-code>;
set-times: func(data-access-timestamp: new-timestamp, data-modification-timestamp: new-timestamp) -> result<_, error-code>;
read: func(length: filesize, offset: filesize) -> result<tuple<list<u8>, bool>, error-code>;
write: func(buffer: list<u8>, offset: filesize) -> result<filesize, error-code>;
read-directory: func() -> result<directory-entry-stream, error-code>;
sync: func() -> result<_, error-code>;
create-directory-at: func(path: string) -> result<_, error-code>;
stat: func() -> result<descriptor-stat, error-code>;
stat-at: func(path-flags: path-flags, path: string) -> result<descriptor-stat, error-code>;
set-times-at: func(path-flags: path-flags, path: string, data-access-timestamp: new-timestamp, data-modification-timestamp: new-timestamp) -> result<_, error-code>;
link-at: func(old-path-flags: path-flags, old-path: string, new-descriptor: borrow<descriptor>, new-path: string) -> result<_, error-code>;
open-at: func(path-flags: path-flags, path: string, open-flags: open-flags, %flags: descriptor-flags) -> result<descriptor, error-code>;
readlink-at: func(path: string) -> result<string, error-code>;
remove-directory-at: func(path: string) -> result<_, error-code>;
rename-at: func(old-path: string, new-descriptor: borrow<descriptor>, new-path: string) -> result<_, error-code>;
symlink-at: func(old-path: string, new-path: string) -> result<_, error-code>;
unlink-file-at: func(path: string) -> result<_, error-code>;
is-same-object: func(other: borrow<descriptor>) -> bool;
metadata-hash: func() -> result<metadata-hash-value, error-code>;
metadata-hash-at: func(path-flags: path-flags, path: string) -> result<metadata-hash-value, error-code>;
}
resource directory-entry-stream {
read-directory-entry: func() -> result<option<directory-entry>, error-code>;
}
filesystem-error-code: func(err: borrow<error>) -> option<error-code>;
}
interface preopens {
use types.{descriptor};
get-directories: func() -> list<tuple<descriptor, string>>;
}

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package wasi:http@0.2.0;
/// This interface defines all of the types and methods for implementing
/// HTTP Requests and Responses, both incoming and outgoing, as well as
/// their headers, trailers, and bodies.
interface types {
use wasi:clocks/monotonic-clock@0.2.0.{duration};
use wasi:io/streams@0.2.0.{input-stream, output-stream};
use wasi:io/error@0.2.0.{error as io-error};
use wasi:io/poll@0.2.0.{pollable};
/// This type corresponds to HTTP standard Methods.
variant method {
get,
head,
post,
put,
delete,
connect,
options,
trace,
patch,
other(string),
}
/// This type corresponds to HTTP standard Related Schemes.
variant scheme {
HTTP,
HTTPS,
other(string),
}
/// Defines the case payload type for `DNS-error` above:
record DNS-error-payload {
rcode: option<string>,
info-code: option<u16>,
}
/// Defines the case payload type for `TLS-alert-received` above:
record TLS-alert-received-payload {
alert-id: option<u8>,
alert-message: option<string>,
}
/// Defines the case payload type for `HTTP-response-{header,trailer}-size` above:
record field-size-payload {
field-name: option<string>,
field-size: option<u32>,
}
/// These cases are inspired by the IANA HTTP Proxy Error Types:
/// https://www.iana.org/assignments/http-proxy-status/http-proxy-status.xhtml#table-http-proxy-error-types
variant error-code {
DNS-timeout,
DNS-error(DNS-error-payload),
destination-not-found,
destination-unavailable,
destination-IP-prohibited,
destination-IP-unroutable,
connection-refused,
connection-terminated,
connection-timeout,
connection-read-timeout,
connection-write-timeout,
connection-limit-reached,
TLS-protocol-error,
TLS-certificate-error,
TLS-alert-received(TLS-alert-received-payload),
HTTP-request-denied,
HTTP-request-length-required,
HTTP-request-body-size(option<u64>),
HTTP-request-method-invalid,
HTTP-request-URI-invalid,
HTTP-request-URI-too-long,
HTTP-request-header-section-size(option<u32>),
HTTP-request-header-size(option<field-size-payload>),
HTTP-request-trailer-section-size(option<u32>),
HTTP-request-trailer-size(field-size-payload),
HTTP-response-incomplete,
HTTP-response-header-section-size(option<u32>),
HTTP-response-header-size(field-size-payload),
HTTP-response-body-size(option<u64>),
HTTP-response-trailer-section-size(option<u32>),
HTTP-response-trailer-size(field-size-payload),
HTTP-response-transfer-coding(option<string>),
HTTP-response-content-coding(option<string>),
HTTP-response-timeout,
HTTP-upgrade-failed,
HTTP-protocol-error,
loop-detected,
configuration-error,
/// This is a catch-all error for anything that doesn't fit cleanly into a
/// more specific case. It also includes an optional string for an
/// unstructured description of the error. Users should not depend on the
/// string for diagnosing errors, as it's not required to be consistent
/// between implementations.
internal-error(option<string>),
}
/// This type enumerates the different kinds of errors that may occur when
/// setting or appending to a `fields` resource.
variant header-error {
/// This error indicates that a `field-key` or `field-value` was
/// syntactically invalid when used with an operation that sets headers in a
/// `fields`.
invalid-syntax,
/// This error indicates that a forbidden `field-key` was used when trying
/// to set a header in a `fields`.
forbidden,
/// This error indicates that the operation on the `fields` was not
/// permitted because the fields are immutable.
immutable,
}
/// Field keys are always strings.
type field-key = string;
/// Field values should always be ASCII strings. However, in
/// reality, HTTP implementations often have to interpret malformed values,
/// so they are provided as a list of bytes.
type field-value = list<u8>;
/// This following block defines the `fields` resource which corresponds to
/// HTTP standard Fields. Fields are a common representation used for both
/// Headers and Trailers.
///
/// A `fields` may be mutable or immutable. A `fields` created using the
/// constructor, `from-list`, or `clone` will be mutable, but a `fields`
/// resource given by other means (including, but not limited to,
/// `incoming-request.headers`, `outgoing-request.headers`) might be be
/// immutable. In an immutable fields, the `set`, `append`, and `delete`
/// operations will fail with `header-error.immutable`.
resource fields {
/// Construct an empty HTTP Fields.
///
/// The resulting `fields` is mutable.
constructor();
/// Construct an HTTP Fields.
///
/// The resulting `fields` is mutable.
///
/// The list represents each key-value pair in the Fields. Keys
/// which have multiple values are represented by multiple entries in this
/// list with the same key.
///
/// The tuple is a pair of the field key, represented as a string, and
/// Value, represented as a list of bytes. In a valid Fields, all keys
/// and values are valid UTF-8 strings. However, values are not always
/// well-formed, so they are represented as a raw list of bytes.
///
/// An error result will be returned if any header or value was
/// syntactically invalid, or if a header was forbidden.
from-list: static func(entries: list<tuple<field-key, field-value>>) -> result<fields, header-error>;
/// Get all of the values corresponding to a key. If the key is not present
/// in this `fields`, an empty list is returned. However, if the key is
/// present but empty, this is represented by a list with one or more
/// empty field-values present.
get: func(name: field-key) -> list<field-value>;
/// Returns `true` when the key is present in this `fields`. If the key is
/// syntactically invalid, `false` is returned.
has: func(name: field-key) -> bool;
/// Set all of the values for a key. Clears any existing values for that
/// key, if they have been set.
///
/// Fails with `header-error.immutable` if the `fields` are immutable.
set: func(name: field-key, value: list<field-value>) -> result<_, header-error>;
/// Delete all values for a key. Does nothing if no values for the key
/// exist.
///
/// Fails with `header-error.immutable` if the `fields` are immutable.
delete: func(name: field-key) -> result<_, header-error>;
/// Append a value for a key. Does not change or delete any existing
/// values for that key.
///
/// Fails with `header-error.immutable` if the `fields` are immutable.
append: func(name: field-key, value: field-value) -> result<_, header-error>;
/// Retrieve the full set of keys and values in the Fields. Like the
/// constructor, the list represents each key-value pair.
///
/// The outer list represents each key-value pair in the Fields. Keys
/// which have multiple values are represented by multiple entries in this
/// list with the same key.
entries: func() -> list<tuple<field-key, field-value>>;
/// Make a deep copy of the Fields. Equivelant in behavior to calling the
/// `fields` constructor on the return value of `entries`. The resulting
/// `fields` is mutable.
clone: func() -> fields;
}
/// Headers is an alias for Fields.
type headers = fields;
/// Trailers is an alias for Fields.
type trailers = fields;
/// Represents an incoming HTTP Request.
resource incoming-request {
/// Returns the method of the incoming request.
method: func() -> method;
/// Returns the path with query parameters from the request, as a string.
path-with-query: func() -> option<string>;
/// Returns the protocol scheme from the request.
scheme: func() -> option<scheme>;
/// Returns the authority from the request, if it was present.
authority: func() -> option<string>;
/// Get the `headers` associated with the request.
///
/// The returned `headers` resource is immutable: `set`, `append`, and
/// `delete` operations will fail with `header-error.immutable`.
///
/// The `headers` returned are a child resource: it must be dropped before
/// the parent `incoming-request` is dropped. Dropping this
/// `incoming-request` before all children are dropped will trap.
headers: func() -> headers;
/// Gives the `incoming-body` associated with this request. Will only
/// return success at most once, and subsequent calls will return error.
consume: func() -> result<incoming-body>;
}
/// Represents an outgoing HTTP Request.
resource outgoing-request {
/// Construct a new `outgoing-request` with a default `method` of `GET`, and
/// `none` values for `path-with-query`, `scheme`, and `authority`.
///
/// * `headers` is the HTTP Headers for the Request.
///
/// It is possible to construct, or manipulate with the accessor functions
/// below, an `outgoing-request` with an invalid combination of `scheme`
/// and `authority`, or `headers` which are not permitted to be sent.
/// It is the obligation of the `outgoing-handler.handle` implementation
/// to reject invalid constructions of `outgoing-request`.
constructor(headers: headers);
/// Returns the resource corresponding to the outgoing Body for this
/// Request.
///
/// Returns success on the first call: the `outgoing-body` resource for
/// this `outgoing-request` can be retrieved at most once. Subsequent
/// calls will return error.
body: func() -> result<outgoing-body>;
/// Get the Method for the Request.
method: func() -> method;
/// Set the Method for the Request. Fails if the string present in a
/// `method.other` argument is not a syntactically valid method.
set-method: func(method: method) -> result;
/// Get the combination of the HTTP Path and Query for the Request.
/// When `none`, this represents an empty Path and empty Query.
path-with-query: func() -> option<string>;
/// Set the combination of the HTTP Path and Query for the Request.
/// When `none`, this represents an empty Path and empty Query. Fails is the
/// string given is not a syntactically valid path and query uri component.
set-path-with-query: func(path-with-query: option<string>) -> result;
/// Get the HTTP Related Scheme for the Request. When `none`, the
/// implementation may choose an appropriate default scheme.
scheme: func() -> option<scheme>;
/// Set the HTTP Related Scheme for the Request. When `none`, the
/// implementation may choose an appropriate default scheme. Fails if the
/// string given is not a syntactically valid uri scheme.
set-scheme: func(scheme: option<scheme>) -> result;
/// Get the HTTP Authority for the Request. A value of `none` may be used
/// with Related Schemes which do not require an Authority. The HTTP and
/// HTTPS schemes always require an authority.
authority: func() -> option<string>;
/// Set the HTTP Authority for the Request. A value of `none` may be used
/// with Related Schemes which do not require an Authority. The HTTP and
/// HTTPS schemes always require an authority. Fails if the string given is
/// not a syntactically valid uri authority.
set-authority: func(authority: option<string>) -> result;
/// Get the headers associated with the Request.
///
/// The returned `headers` resource is immutable: `set`, `append`, and
/// `delete` operations will fail with `header-error.immutable`.
///
/// This headers resource is a child: it must be dropped before the parent
/// `outgoing-request` is dropped, or its ownership is transfered to
/// another component by e.g. `outgoing-handler.handle`.
headers: func() -> headers;
}
/// Parameters for making an HTTP Request. Each of these parameters is
/// currently an optional timeout applicable to the transport layer of the
/// HTTP protocol.
///
/// These timeouts are separate from any the user may use to bound a
/// blocking call to `wasi:io/poll.poll`.
resource request-options {
/// Construct a default `request-options` value.
constructor();
/// The timeout for the initial connect to the HTTP Server.
connect-timeout: func() -> option<duration>;
/// Set the timeout for the initial connect to the HTTP Server. An error
/// return value indicates that this timeout is not supported.
set-connect-timeout: func(duration: option<duration>) -> result;
/// The timeout for receiving the first byte of the Response body.
first-byte-timeout: func() -> option<duration>;
/// Set the timeout for receiving the first byte of the Response body. An
/// error return value indicates that this timeout is not supported.
set-first-byte-timeout: func(duration: option<duration>) -> result;
/// The timeout for receiving subsequent chunks of bytes in the Response
/// body stream.
between-bytes-timeout: func() -> option<duration>;
/// Set the timeout for receiving subsequent chunks of bytes in the Response
/// body stream. An error return value indicates that this timeout is not
/// supported.
set-between-bytes-timeout: func(duration: option<duration>) -> result;
}
/// Represents the ability to send an HTTP Response.
///
/// This resource is used by the `wasi:http/incoming-handler` interface to
/// allow a Response to be sent corresponding to the Request provided as the
/// other argument to `incoming-handler.handle`.
resource response-outparam {
/// Set the value of the `response-outparam` to either send a response,
/// or indicate an error.
///
/// This method consumes the `response-outparam` to ensure that it is
/// called at most once. If it is never called, the implementation
/// will respond with an error.
///
/// The user may provide an `error` to `response` to allow the
/// implementation determine how to respond with an HTTP error response.
set: static func(param: response-outparam, response: result<outgoing-response, error-code>);
}
/// This type corresponds to the HTTP standard Status Code.
type status-code = u16;
/// Represents an incoming HTTP Response.
resource incoming-response {
/// Returns the status code from the incoming response.
status: func() -> status-code;
/// Returns the headers from the incoming response.
///
/// The returned `headers` resource is immutable: `set`, `append`, and
/// `delete` operations will fail with `header-error.immutable`.
///
/// This headers resource is a child: it must be dropped before the parent
/// `incoming-response` is dropped.
headers: func() -> headers;
/// Returns the incoming body. May be called at most once. Returns error
/// if called additional times.
consume: func() -> result<incoming-body>;
}
/// Represents an incoming HTTP Request or Response's Body.
///
/// A body has both its contents - a stream of bytes - and a (possibly
/// empty) set of trailers, indicating that the full contents of the
/// body have been received. This resource represents the contents as
/// an `input-stream` and the delivery of trailers as a `future-trailers`,
/// and ensures that the user of this interface may only be consuming either
/// the body contents or waiting on trailers at any given time.
resource incoming-body {
/// Returns the contents of the body, as a stream of bytes.
///
/// Returns success on first call: the stream representing the contents
/// can be retrieved at most once. Subsequent calls will return error.
///
/// The returned `input-stream` resource is a child: it must be dropped
/// before the parent `incoming-body` is dropped, or consumed by
/// `incoming-body.finish`.
///
/// This invariant ensures that the implementation can determine whether
/// the user is consuming the contents of the body, waiting on the
/// `future-trailers` to be ready, or neither. This allows for network
/// backpressure is to be applied when the user is consuming the body,
/// and for that backpressure to not inhibit delivery of the trailers if
/// the user does not read the entire body.
%stream: func() -> result<input-stream>;
/// Takes ownership of `incoming-body`, and returns a `future-trailers`.
/// This function will trap if the `input-stream` child is still alive.
finish: static func(this: incoming-body) -> future-trailers;
}
/// Represents a future which may eventaully return trailers, or an error.
///
/// In the case that the incoming HTTP Request or Response did not have any
/// trailers, this future will resolve to the empty set of trailers once the
/// complete Request or Response body has been received.
resource future-trailers {
/// Returns a pollable which becomes ready when either the trailers have
/// been received, or an error has occured. When this pollable is ready,
/// the `get` method will return `some`.
subscribe: func() -> pollable;
/// Returns the contents of the trailers, or an error which occured,
/// once the future is ready.
///
/// The outer `option` represents future readiness. Users can wait on this
/// `option` to become `some` using the `subscribe` method.
///
/// The outer `result` is used to retrieve the trailers or error at most
/// once. It will be success on the first call in which the outer option
/// is `some`, and error on subsequent calls.
///
/// The inner `result` represents that either the HTTP Request or Response
/// body, as well as any trailers, were received successfully, or that an
/// error occured receiving them. The optional `trailers` indicates whether
/// or not trailers were present in the body.
///
/// When some `trailers` are returned by this method, the `trailers`
/// resource is immutable, and a child. Use of the `set`, `append`, or
/// `delete` methods will return an error, and the resource must be
/// dropped before the parent `future-trailers` is dropped.
get: func() -> option<result<result<option<trailers>, error-code>>>;
}
/// Represents an outgoing HTTP Response.
resource outgoing-response {
/// Construct an `outgoing-response`, with a default `status-code` of `200`.
/// If a different `status-code` is needed, it must be set via the
/// `set-status-code` method.
///
/// * `headers` is the HTTP Headers for the Response.
constructor(headers: headers);
/// Get the HTTP Status Code for the Response.
status-code: func() -> status-code;
/// Set the HTTP Status Code for the Response. Fails if the status-code
/// given is not a valid http status code.
set-status-code: func(status-code: status-code) -> result;
/// Get the headers associated with the Request.
///
/// The returned `headers` resource is immutable: `set`, `append`, and
/// `delete` operations will fail with `header-error.immutable`.
///
/// This headers resource is a child: it must be dropped before the parent
/// `outgoing-request` is dropped, or its ownership is transfered to
/// another component by e.g. `outgoing-handler.handle`.
headers: func() -> headers;
/// Returns the resource corresponding to the outgoing Body for this Response.
///
/// Returns success on the first call: the `outgoing-body` resource for
/// this `outgoing-response` can be retrieved at most once. Subsequent
/// calls will return error.
body: func() -> result<outgoing-body>;
}
/// Represents an outgoing HTTP Request or Response's Body.
///
/// A body has both its contents - a stream of bytes - and a (possibly
/// empty) set of trailers, inducating the full contents of the body
/// have been sent. This resource represents the contents as an
/// `output-stream` child resource, and the completion of the body (with
/// optional trailers) with a static function that consumes the
/// `outgoing-body` resource, and ensures that the user of this interface
/// may not write to the body contents after the body has been finished.
///
/// If the user code drops this resource, as opposed to calling the static
/// method `finish`, the implementation should treat the body as incomplete,
/// and that an error has occured. The implementation should propogate this
/// error to the HTTP protocol by whatever means it has available,
/// including: corrupting the body on the wire, aborting the associated
/// Request, or sending a late status code for the Response.
resource outgoing-body {
/// Returns a stream for writing the body contents.
///
/// The returned `output-stream` is a child resource: it must be dropped
/// before the parent `outgoing-body` resource is dropped (or finished),
/// otherwise the `outgoing-body` drop or `finish` will trap.
///
/// Returns success on the first call: the `output-stream` resource for
/// this `outgoing-body` may be retrieved at most once. Subsequent calls
/// will return error.
write: func() -> result<output-stream>;
/// Finalize an outgoing body, optionally providing trailers. This must be
/// called to signal that the response is complete. If the `outgoing-body`
/// is dropped without calling `outgoing-body.finalize`, the implementation
/// should treat the body as corrupted.
///
/// Fails if the body's `outgoing-request` or `outgoing-response` was
/// constructed with a Content-Length header, and the contents written
/// to the body (via `write`) does not match the value given in the
/// Content-Length.
finish: static func(this: outgoing-body, trailers: option<trailers>) -> result<_, error-code>;
}
/// Represents a future which may eventaully return an incoming HTTP
/// Response, or an error.
///
/// This resource is returned by the `wasi:http/outgoing-handler` interface to
/// provide the HTTP Response corresponding to the sent Request.
resource future-incoming-response {
/// Returns a pollable which becomes ready when either the Response has
/// been received, or an error has occured. When this pollable is ready,
/// the `get` method will return `some`.
subscribe: func() -> pollable;
/// Returns the incoming HTTP Response, or an error, once one is ready.
///
/// The outer `option` represents future readiness. Users can wait on this
/// `option` to become `some` using the `subscribe` method.
///
/// The outer `result` is used to retrieve the response or error at most
/// once. It will be success on the first call in which the outer option
/// is `some`, and error on subsequent calls.
///
/// The inner `result` represents that either the incoming HTTP Response
/// status and headers have recieved successfully, or that an error
/// occured. Errors may also occur while consuming the response body,
/// but those will be reported by the `incoming-body` and its
/// `output-stream` child.
get: func() -> option<result<result<incoming-response, error-code>>>;
}
/// Attempts to extract a http-related `error` from the wasi:io `error`
/// provided.
///
/// Stream operations which return
/// `wasi:io/stream/stream-error::last-operation-failed` have a payload of
/// type `wasi:io/error/error` with more information about the operation
/// that failed. This payload can be passed through to this function to see
/// if there's http-related information about the error to return.
///
/// Note that this function is fallible because not all io-errors are
/// http-related errors.
http-error-code: func(err: borrow<io-error>) -> option<error-code>;
}
/// This interface defines a handler of incoming HTTP Requests. It should
/// be exported by components which can respond to HTTP Requests.
interface incoming-handler {
use types.{incoming-request, response-outparam};
/// This function is invoked with an incoming HTTP Request, and a resource
/// `response-outparam` which provides the capability to reply with an HTTP
/// Response. The response is sent by calling the `response-outparam.set`
/// method, which allows execution to continue after the response has been
/// sent. This enables both streaming to the response body, and performing other
/// work.
///
/// The implementor of this function must write a response to the
/// `response-outparam` before returning, or else the caller will respond
/// with an error on its behalf.
handle: func(request: incoming-request, response-out: response-outparam);
}
/// This interface defines a handler of outgoing HTTP Requests. It should be
/// imported by components which wish to make HTTP Requests.
interface outgoing-handler {
use types.{outgoing-request, request-options, future-incoming-response, error-code};
/// This function is invoked with an outgoing HTTP Request, and it returns
/// a resource `future-incoming-response` which represents an HTTP Response
/// which may arrive in the future.
///
/// The `options` argument accepts optional parameters for the HTTP
/// protocol's transport layer.
///
/// This function may return an error if the `outgoing-request` is invalid
/// or not allowed to be made. Otherwise, protocol errors are reported
/// through the `future-incoming-response`.
handle: func(request: outgoing-request, options: option<request-options>) -> result<future-incoming-response, error-code>;
}
/// The `wasi:http/proxy` world captures a widely-implementable intersection of
/// hosts that includes HTTP forward and reverse proxies. Components targeting
/// this world may concurrently stream in and out any number of incoming and
/// outgoing HTTP requests.
world proxy {
import wasi:random/random@0.2.0;
import wasi:io/error@0.2.0;
import wasi:io/poll@0.2.0;
import wasi:io/streams@0.2.0;
import wasi:cli/stdout@0.2.0;
import wasi:cli/stderr@0.2.0;
import wasi:cli/stdin@0.2.0;
import wasi:clocks/monotonic-clock@0.2.0;
import types;
import outgoing-handler;
import wasi:clocks/wall-clock@0.2.0;
export incoming-handler;
}

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package wasi:io@0.2.0;
interface poll {
resource pollable {
ready: func() -> bool;
block: func();
}
poll: func(in: list<borrow<pollable>>) -> list<u32>;
}
interface error {
resource error {
to-debug-string: func() -> string;
}
}
interface streams {
use error.{error};
use poll.{pollable};
variant stream-error {
last-operation-failed(error),
closed,
}
resource input-stream {
read: func(len: u64) -> result<list<u8>, stream-error>;
blocking-read: func(len: u64) -> result<list<u8>, stream-error>;
skip: func(len: u64) -> result<u64, stream-error>;
blocking-skip: func(len: u64) -> result<u64, stream-error>;
subscribe: func() -> pollable;
}
resource output-stream {
check-write: func() -> result<u64, stream-error>;
write: func(contents: list<u8>) -> result<_, stream-error>;
blocking-write-and-flush: func(contents: list<u8>) -> result<_, stream-error>;
flush: func() -> result<_, stream-error>;
blocking-flush: func() -> result<_, stream-error>;
subscribe: func() -> pollable;
write-zeroes: func(len: u64) -> result<_, stream-error>;
blocking-write-zeroes-and-flush: func(len: u64) -> result<_, stream-error>;
splice: func(src: borrow<input-stream>, len: u64) -> result<u64, stream-error>;
blocking-splice: func(src: borrow<input-stream>, len: u64) -> result<u64, stream-error>;
}
}

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package wasi:logging@0.1.0-draft;
interface logging {
enum level {
trace,
debug,
info,
warn,
error,
critical,
}
log: func(level: level, context: string, message: string);
}

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package wasi:random@0.2.0;
interface random {
get-random-bytes: func(len: u64) -> list<u8>;
get-random-u64: func() -> u64;
}
interface insecure {
get-insecure-random-bytes: func(len: u64) -> list<u8>;
get-insecure-random-u64: func() -> u64;
}
interface insecure-seed {
insecure-seed: func() -> tuple<u64, u64>;
}

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package wasi:sockets@0.2.0;
interface network {
resource network;
enum error-code {
unknown,
access-denied,
not-supported,
invalid-argument,
out-of-memory,
timeout,
concurrency-conflict,
not-in-progress,
would-block,
invalid-state,
new-socket-limit,
address-not-bindable,
address-in-use,
remote-unreachable,
connection-refused,
connection-reset,
connection-aborted,
datagram-too-large,
name-unresolvable,
temporary-resolver-failure,
permanent-resolver-failure,
}
enum ip-address-family {
ipv4,
ipv6,
}
type ipv4-address = tuple<u8, u8, u8, u8>;
type ipv6-address = tuple<u16, u16, u16, u16, u16, u16, u16, u16>;
variant ip-address {
ipv4(ipv4-address),
ipv6(ipv6-address),
}
record ipv4-socket-address {
port: u16,
address: ipv4-address,
}
record ipv6-socket-address {
port: u16,
flow-info: u32,
address: ipv6-address,
scope-id: u32,
}
variant ip-socket-address {
ipv4(ipv4-socket-address),
ipv6(ipv6-socket-address),
}
}
interface instance-network {
use network.{network};
instance-network: func() -> network;
}
interface udp {
use wasi:io/poll@0.2.0.{pollable};
use network.{network, error-code, ip-socket-address, ip-address-family};
record incoming-datagram {
data: list<u8>,
remote-address: ip-socket-address,
}
record outgoing-datagram {
data: list<u8>,
remote-address: option<ip-socket-address>,
}
resource udp-socket {
start-bind: func(network: borrow<network>, local-address: ip-socket-address) -> result<_, error-code>;
finish-bind: func() -> result<_, error-code>;
%stream: func(remote-address: option<ip-socket-address>) -> result<tuple<incoming-datagram-stream, outgoing-datagram-stream>, error-code>;
local-address: func() -> result<ip-socket-address, error-code>;
remote-address: func() -> result<ip-socket-address, error-code>;
address-family: func() -> ip-address-family;
unicast-hop-limit: func() -> result<u8, error-code>;
set-unicast-hop-limit: func(value: u8) -> result<_, error-code>;
receive-buffer-size: func() -> result<u64, error-code>;
set-receive-buffer-size: func(value: u64) -> result<_, error-code>;
send-buffer-size: func() -> result<u64, error-code>;
set-send-buffer-size: func(value: u64) -> result<_, error-code>;
subscribe: func() -> pollable;
}
resource incoming-datagram-stream {
receive: func(max-results: u64) -> result<list<incoming-datagram>, error-code>;
subscribe: func() -> pollable;
}
resource outgoing-datagram-stream {
check-send: func() -> result<u64, error-code>;
send: func(datagrams: list<outgoing-datagram>) -> result<u64, error-code>;
subscribe: func() -> pollable;
}
}
interface udp-create-socket {
use network.{network, error-code, ip-address-family};
use udp.{udp-socket};
create-udp-socket: func(address-family: ip-address-family) -> result<udp-socket, error-code>;
}
interface tcp {
use wasi:io/streams@0.2.0.{input-stream, output-stream};
use wasi:io/poll@0.2.0.{pollable};
use wasi:clocks/monotonic-clock@0.2.0.{duration};
use network.{network, error-code, ip-socket-address, ip-address-family};
enum shutdown-type {
receive,
send,
both,
}
resource tcp-socket {
start-bind: func(network: borrow<network>, local-address: ip-socket-address) -> result<_, error-code>;
finish-bind: func() -> result<_, error-code>;
start-connect: func(network: borrow<network>, remote-address: ip-socket-address) -> result<_, error-code>;
finish-connect: func() -> result<tuple<input-stream, output-stream>, error-code>;
start-listen: func() -> result<_, error-code>;
finish-listen: func() -> result<_, error-code>;
accept: func() -> result<tuple<tcp-socket, input-stream, output-stream>, error-code>;
local-address: func() -> result<ip-socket-address, error-code>;
remote-address: func() -> result<ip-socket-address, error-code>;
is-listening: func() -> bool;
address-family: func() -> ip-address-family;
set-listen-backlog-size: func(value: u64) -> result<_, error-code>;
keep-alive-enabled: func() -> result<bool, error-code>;
set-keep-alive-enabled: func(value: bool) -> result<_, error-code>;
keep-alive-idle-time: func() -> result<duration, error-code>;
set-keep-alive-idle-time: func(value: duration) -> result<_, error-code>;
keep-alive-interval: func() -> result<duration, error-code>;
set-keep-alive-interval: func(value: duration) -> result<_, error-code>;
keep-alive-count: func() -> result<u32, error-code>;
set-keep-alive-count: func(value: u32) -> result<_, error-code>;
hop-limit: func() -> result<u8, error-code>;
set-hop-limit: func(value: u8) -> result<_, error-code>;
receive-buffer-size: func() -> result<u64, error-code>;
set-receive-buffer-size: func(value: u64) -> result<_, error-code>;
send-buffer-size: func() -> result<u64, error-code>;
set-send-buffer-size: func(value: u64) -> result<_, error-code>;
subscribe: func() -> pollable;
shutdown: func(shutdown-type: shutdown-type) -> result<_, error-code>;
}
}
interface tcp-create-socket {
use network.{network, error-code, ip-address-family};
use tcp.{tcp-socket};
create-tcp-socket: func(address-family: ip-address-family) -> result<tcp-socket, error-code>;
}
interface ip-name-lookup {
use wasi:io/poll@0.2.0.{pollable};
use network.{network, error-code, ip-address};
resource resolve-address-stream {
resolve-next-address: func() -> result<option<ip-address>, error-code>;
subscribe: func() -> pollable;
}
resolve-addresses: func(network: borrow<network>, name: string) -> result<resolve-address-stream, error-code>;
}

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package wasmcloud:bus@1.0.0;
interface lattice {
resource call-target-interface {
constructor(namespace: string, %package: string, %interface: string);
}
set-link-name: func(name: string, interfaces: list<call-target-interface>);
}

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package wasmcloud:component-go@0.1.0;
world exports {
import wasi:io/poll@0.2.0;
import wasi:clocks/monotonic-clock@0.2.0;
import wasi:io/error@0.2.0;
import wasi:io/streams@0.2.0;
import wasi:http/types@0.2.0;
export wasi:http/incoming-handler@0.2.0;
}
world imports {
import wasi:logging/logging@0.1.0-draft;
import wasi:config/runtime@0.2.0-draft;
import wasi:io/poll@0.2.0;
import wasi:clocks/monotonic-clock@0.2.0;
import wasi:io/error@0.2.0;
import wasi:io/streams@0.2.0;
import wasi:http/types@0.2.0;
import wasi:http/outgoing-handler@0.2.0;
import wasmcloud:bus/lattice@1.0.0;
import wasmcloud:secrets/store@0.1.0-draft;
import wasmcloud:secrets/reveal@0.1.0-draft;
import wasi:cli/environment@0.2.0;
import wasi:cli/exit@0.2.0;
import wasi:cli/stdin@0.2.0;
import wasi:cli/stdout@0.2.0;
import wasi:cli/stderr@0.2.0;
import wasi:cli/terminal-input@0.2.0;
import wasi:cli/terminal-output@0.2.0;
import wasi:cli/terminal-stdin@0.2.0;
import wasi:cli/terminal-stdout@0.2.0;
import wasi:cli/terminal-stderr@0.2.0;
import wasi:clocks/wall-clock@0.2.0;
import wasi:filesystem/types@0.2.0;
import wasi:filesystem/preopens@0.2.0;
import wasi:sockets/network@0.2.0;
import wasi:sockets/instance-network@0.2.0;
import wasi:sockets/udp@0.2.0;
import wasi:sockets/udp-create-socket@0.2.0;
import wasi:sockets/tcp@0.2.0;
import wasi:sockets/tcp-create-socket@0.2.0;
import wasi:sockets/ip-name-lookup@0.2.0;
import wasi:random/random@0.2.0;
import wasi:random/insecure@0.2.0;
import wasi:random/insecure-seed@0.2.0;
}
world sdk {
import wasi:io/poll@0.2.0;
import wasi:clocks/monotonic-clock@0.2.0;
import wasi:io/error@0.2.0;
import wasi:io/streams@0.2.0;
import wasi:http/types@0.2.0;
import wasi:logging/logging@0.1.0-draft;
import wasi:config/runtime@0.2.0-draft;
import wasi:http/outgoing-handler@0.2.0;
import wasmcloud:bus/lattice@1.0.0;
import wasmcloud:secrets/store@0.1.0-draft;
import wasmcloud:secrets/reveal@0.1.0-draft;
import wasi:cli/environment@0.2.0;
import wasi:cli/exit@0.2.0;
import wasi:cli/stdin@0.2.0;
import wasi:cli/stdout@0.2.0;
import wasi:cli/stderr@0.2.0;
import wasi:cli/terminal-input@0.2.0;
import wasi:cli/terminal-output@0.2.0;
import wasi:cli/terminal-stdin@0.2.0;
import wasi:cli/terminal-stdout@0.2.0;
import wasi:cli/terminal-stderr@0.2.0;
import wasi:clocks/wall-clock@0.2.0;
import wasi:filesystem/types@0.2.0;
import wasi:filesystem/preopens@0.2.0;
import wasi:sockets/network@0.2.0;
import wasi:sockets/instance-network@0.2.0;
import wasi:sockets/udp@0.2.0;
import wasi:sockets/udp-create-socket@0.2.0;
import wasi:sockets/tcp@0.2.0;
import wasi:sockets/tcp-create-socket@0.2.0;
import wasi:sockets/ip-name-lookup@0.2.0;
import wasi:random/random@0.2.0;
import wasi:random/insecure@0.2.0;
import wasi:random/insecure-seed@0.2.0;
export wasi:http/incoming-handler@0.2.0;
}

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package wasmcloud:secrets@0.1.0-draft;
interface store {
variant secrets-error {
upstream(string),
io(string),
not-found,
}
variant secret-value {
%string(string),
bytes(list<u8>),
}
resource secret;
get: func(key: string) -> result<secret, secrets-error>;
}
interface reveal {
use store.{secret, secret-value};
reveal: func(s: borrow<secret>) -> secret-value;
}

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package wasmcloud:hello;
world hello {
include wasmcloud:component-go/imports@0.1.0;
export wasmcloud:messaging/handler@0.2.0;
import wasmcloud:messaging/consumer@0.2.0;
}