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93 lines
2.2 KiB
Go
93 lines
2.2 KiB
Go
/*
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* Licensed to the LF AI & Data foundation under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package expr
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import (
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"context"
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"fmt"
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"unsafe"
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"github.com/expr-lang/expr"
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"github.com/expr-lang/expr/vm"
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"go.uber.org/zap"
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"google.golang.org/protobuf/proto"
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"github.com/milvus-io/milvus/pkg/log"
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"github.com/milvus-io/milvus/pkg/util/paramtable"
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)
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var (
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v *vm.VM
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env map[string]any
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authKey string
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)
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func Init() {
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v = &vm.VM{}
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env = map[string]any{
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"ctx": context.TODO(),
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"objSize": func(p any) int {
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message, ok := p.(proto.Message)
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if !ok {
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return int(unsafe.Sizeof(p))
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}
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return proto.Size(message)
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},
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}
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authKey = paramtable.Get().EtcdCfg.RootPath.GetValue()
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}
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func Register(key string, value any) {
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if env != nil {
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env[key] = value
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}
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}
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func Exec(code, auth string) (res string, err error) {
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defer func() {
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if e := recover(); e != nil {
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err = fmt.Errorf("panic: %v", e)
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}
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}()
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if v == nil {
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return "", fmt.Errorf("the expr isn't inited")
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}
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if code == "" {
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return "", fmt.Errorf("the expr code is empty")
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}
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if auth == "" {
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return "", fmt.Errorf("the expr auth is empty")
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}
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if authKey != auth {
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return "", fmt.Errorf("the expr auth is invalid")
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}
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program, err := expr.Compile(code, expr.Env(env), expr.WithContext("ctx"))
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if err != nil {
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log.Warn("expr compile failed", zap.String("code", code), zap.Error(err))
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return "", err
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}
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output, err := v.Run(program, env)
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if err != nil {
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log.Warn("expr run failed", zap.String("code", code), zap.Error(err))
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return "", err
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}
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return fmt.Sprintf("%v", output), nil
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}
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