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http.go
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http.go
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package wasi_http
import (
"context"
"fmt"
"log"
"net/http"
"github.com/brendandburns/wazero-http/wasi_http/default_http"
"github.com/brendandburns/wazero-http/wasi_http/server"
"github.com/brendandburns/wazero-http/wasi_http/streams"
"github.com/brendandburns/wazero-http/wasi_http/types"
"github.com/tetratelabs/wazero"
"github.com/tetratelabs/wazero/api"
)
type WasiHTTP struct {
s *streams.Streams
f *types.FieldsCollection
r *types.Requests
rs *types.Responses
o *types.OutResponses
b *types.Bodies
v string
}
func MakeWasiHTTP(version string) *WasiHTTP {
s := streams.MakeStreams()
f := types.MakeFields()
r := types.MakeRequests(s, f)
rs := types.MakeResponses(s, f)
o := types.MakeOutresponses()
return &WasiHTTP{
s: s,
f: f,
r: r,
rs: rs,
o: o,
v: version,
}
}
func (w *WasiHTTP) Instantiate(ctx context.Context, rt wazero.Runtime) error {
switch w.v {
case "v1":
return w.instantiateV1(ctx, rt)
case "2023_10_18":
return w.instantiate_2023_10_18(ctx, rt)
case "2023_11_10":
return w.instantiate_2023_11_10(ctx, rt)
case "v0.2.0":
return w.instantiate_0_2_0(ctx, rt)
default:
return fmt.Errorf("unknown version: '%v'", w.v)
}
}
func (w *WasiHTTP) instantiateV1(ctx context.Context, rt wazero.Runtime) error {
if err := types.Instantiate_v1(ctx, rt, w.s, w.r, w.rs, w.f, w.o); err != nil {
return err
}
if err := streams.Instantiate_v1(ctx, rt, w.s); err != nil {
return err
}
if err := default_http.Instantiate(ctx, rt, w.r, w.rs, w.f, w.v); err != nil {
return err
}
return nil
}
func (w *WasiHTTP) instantiate_2023_10_18(ctx context.Context, rt wazero.Runtime) error {
if err := types.Instantiate_2023_10_18(ctx, rt, w.s, w.r, w.rs, w.f, w.o); err != nil {
return err
}
if err := streams.Instantiate_2023_10_18(ctx, rt, w.s); err != nil {
return err
}
if err := default_http.Instantiate(ctx, rt, w.r, w.rs, w.f, w.v); err != nil {
return err
}
return nil
}
func (w *WasiHTTP) instantiate_2023_11_10(ctx context.Context, rt wazero.Runtime) error {
w.b = &types.Bodies{Requests: w.r, Responses: w.rs}
if err := types.Instantiate_2023_11_10(ctx, rt, w.s, w.r, w.rs, w.f, w.o, w.b); err != nil {
return err
}
if err := streams.Instantiate_2023_11_10(ctx, rt, w.s); err != nil {
return err
}
if err := default_http.Instantiate(ctx, rt, w.r, w.rs, w.f, w.v); err != nil {
return err
}
return nil
}
func (w *WasiHTTP) instantiate_0_2_0(ctx context.Context, rt wazero.Runtime) error {
w.b = &types.Bodies{Requests: w.r, Responses: w.rs}
if err := types.Instantiate_0_2_0(ctx, rt, w.s, w.r, w.rs, w.f, w.o, w.b); err != nil {
return err
}
if err := streams.Instantiate_0_2_0(ctx, rt, w.s); err != nil {
return err
}
if err := default_http.Instantiate(ctx, rt, w.r, w.rs, w.f, w.v); err != nil {
return err
}
return nil
}
func DetectWasiHttp(module wazero.CompiledModule) (bool, string) {
functions := module.ImportedFunctions()
hasWasiHttp := false
version := ""
for _, f := range functions {
moduleName, name, ok := f.Import()
if !ok || (moduleName != default_http.ModuleName && moduleName != default_http.ModuleName_2023_10_18) {
continue
}
switch name {
case "handle":
hasWasiHttp = true
switch moduleName {
case default_http.ModuleName:
version = "v1"
case default_http.ModuleName_2023_10_18:
version = "2023_10_18"
default:
version = "unknown"
}
}
}
return hasWasiHttp, version
}
func (w *WasiHTTP) MakeHandler(ctx context.Context, m api.Module) http.Handler {
fnName := ""
switch w.v {
case "v1":
fnName = "HTTP#handle"
case "2023_10_18":
fnName = "exports_wasi_http_0_2_0_rc_2023_10_18_incoming_handler_handle"
case "2023_11_10":
fnName = "wasi:http/incoming-handler@0.2.0-rc-2023-11-10#handle"
case "v0.2.0":
fnName = "wasi:http/incoming-handler@0.2.0#handle"
default:
log.Fatalf("Unknown version: %v", w.v)
}
return server.WasmServer{
Ctx: ctx,
Module: m,
Requests: w.r,
Responses: w.rs,
Fields: w.f,
OutParams: w.o,
HandleFn: fnName,
}
}