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executor.go
148 lines (136 loc) · 4 KB
/
executor.go
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// Copyright © 2023 OpenIM SDK. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build js && wasm
// +build js,wasm
package exec
import (
"context"
"errors"
"github.com/OpenIMSDK/tools/errs"
"github.com/OpenIMSDK/tools/log"
"github.com/openimsdk/openim-sdk-core/v3/pkg/utils"
"runtime"
"syscall/js"
"time"
)
type CallbackData struct {
ErrCode int32 `json:"errCode"`
ErrMsg string `json:"errMsg"`
Data interface{} `json:"data"`
}
const TIMEOUT = 5
const JSNOTFOUND = 10002
var ErrType = errors.New("from javascript data type err")
var PrimaryKeyNull = errors.New("primary key is null err")
var ErrTimoutFromJavaScript = errors.New("invoke javascript timeout,maybe should check function from javascript")
var jsErr = js.Global().Get("Error")
func Exec(args ...interface{}) (output interface{}, err error) {
ctx := context.Background()
defer func() {
if r := recover(); r != nil {
switch x := r.(type) {
case string:
err = utils.Wrap(errors.New(x), "")
case error:
err = x
default:
err = utils.Wrap(errors.New("unknown panic"), "")
}
}
}()
thenChannel := make(chan []js.Value)
defer close(thenChannel)
catchChannel := make(chan []js.Value)
defer close(catchChannel)
pc, _, _, _ := runtime.Caller(1)
funcName := utils.CleanUpfuncName(runtime.FuncForPC(pc).Name())
data := CallbackData{}
thenFunc := js.FuncOf(func(this js.Value, args []js.Value) interface{} {
defer func() {
if r := recover(); r != nil {
switch x := r.(type) {
case string:
err = utils.Wrap(errors.New(x), "")
case error:
err = x
default:
err = utils.Wrap(errors.New("unknown panic"), "")
}
}
}()
log.ZDebug(ctx, "js then function", "=> (main go context) "+funcName+" "+
"with response ", args[0].String())
thenChannel <- args
return nil
})
defer thenFunc.Release()
catchFunc := js.FuncOf(func(this js.Value, args []js.Value) interface{} {
defer func() {
if r := recover(); r != nil {
switch x := r.(type) {
case string:
err = utils.Wrap(errors.New(x), "")
case error:
err = x
default:
err = utils.Wrap(errors.New("unknown panic"), "")
}
}
}()
log.ZDebug(ctx, "js catch function", "=> (main go context) "+funcName+" with respone ", args[0].String())
catchChannel <- args
return nil
})
defer catchFunc.Release()
js.Global().Call(utils.FirstLower(funcName), args...).Call("then", thenFunc).Call("catch", catchFunc)
select {
case result := <-thenChannel:
if len(result) > 0 {
switch result[0].Type() {
case js.TypeString:
interErr := utils.JsonStringToStruct(result[0].String(), &data)
if interErr != nil {
err = utils.Wrap(err, "return json unmarshal err from javascript")
}
case js.TypeObject:
return result[0], nil
default:
err = errors.New("unknown return type from javascript")
}
} else {
err = errors.New("args err,length is 0")
}
case catch := <-catchChannel:
if catch[0].InstanceOf(jsErr) {
return nil, js.Error{Value: catch[0]}
} else {
panic("unknown javascript exception")
}
case <-time.After(TIMEOUT * time.Second):
panic(ErrTimoutFromJavaScript)
}
if data.ErrCode != 0 {
if data.ErrCode == JSNOTFOUND {
return nil, errs.ErrRecordNotFound
}
return "", errors.New(data.ErrMsg)
}
return data.Data, err
}
func ExtractArrayBuffer(arrayBuffer js.Value) []byte {
uint8Array := js.Global().Get("Uint8Array").New(arrayBuffer)
dst := make([]byte, uint8Array.Length())
js.CopyBytesToGo(dst, uint8Array)
return dst
}