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classfile_v2.go
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classfile_v2.go
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/*
* Copyright (c) 2023 The GoPlus Authors (goplus.org). 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.
*/
package yap
import (
"reflect"
"strings"
)
// Handler is worker class of YAP classfile (v2).
type Handler struct {
Context
}
// Main is required by Go+ compiler as the entry of a YAP HTTP handler.
func (p *Handler) Main(ctx *Context) {
p.Context = *ctx
}
var (
repl = strings.NewReplacer("_", "/", "#", ":")
)
func parseClassfname(name string) (method, path string) {
pos := strings.IndexByte(name, '_')
if pos < 0 {
return name, "/"
}
return name[:pos], repl.Replace(name[pos:])
}
// AppV2 is project class of YAP classfile (v2).
type AppV2 struct {
App
}
type iHandler interface {
Main(ctx *Context)
Classfname() string
}
// Gopt_AppV2_Main is required by Go+ compiler as the entry of a YAP project.
func Gopt_AppV2_Main(app AppType, handlers ...iHandler) {
app.InitYap()
for _, h := range handlers {
hVal := reflect.ValueOf(h).Elem()
hVal.FieldByName("AppV2").Set(reflect.ValueOf(app))
hType := hVal.Type()
handle := func(ctx *Context) {
// We must duplicate the handler instance for each request
// to ensure state isolation.
h2Val := reflect.New(hType).Elem()
h2Val.Set(hVal)
h2 := h2Val.Addr().Interface().(iHandler)
h2.Main(ctx)
}
switch method, path := parseClassfname(h.Classfname()); method {
case "handle":
app.Handle(path, handle)
default:
app.Route(strings.ToUpper(method), path, handle)
}
}
if me, ok := app.(interface{ MainEntry() }); ok {
me.MainEntry()
} else {
app.Run("localhost:8080")
}
}