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91 lines
2.5 KiB
Go
91 lines
2.5 KiB
Go
// Copyright 2018 gf Author(https://github.com/gogf/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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package ghttp
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import (
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"github.com/gogf/gf/debug/gdebug"
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"net/http"
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)
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// BindHookHandler registers handler for specified hook.
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func (s *Server) BindHookHandler(pattern string, hook string, handler HandlerFunc) {
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s.doBindHookHandler(pattern, hook, handler, "")
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}
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func (s *Server) doBindHookHandler(pattern string, hook string, handler HandlerFunc, source string) {
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s.setHandler(pattern, &handlerItem{
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itemType: gHANDLER_TYPE_HOOK,
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itemName: gdebug.FuncPath(handler),
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itemFunc: handler,
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hookName: hook,
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source: source,
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})
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}
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func (s *Server) BindHookHandlerByMap(pattern string, hookMap map[string]HandlerFunc) {
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for k, v := range hookMap {
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s.BindHookHandler(pattern, k, v)
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}
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}
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// callHookHandler calls the hook handler by their registered sequences.
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func (s *Server) callHookHandler(hook string, r *Request) {
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hookItems := r.getHookHandlers(hook)
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if len(hookItems) > 0 {
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// Backup the old router variable map.
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oldRouterMap := r.routerMap
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for _, item := range hookItems {
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r.routerMap = item.values
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// DO NOT USE the router of the hook handler,
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// which can overwrite the router of serving handler.
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// r.Router = item.handler.router
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if err := s.niceCallHookHandler(item.handler.itemFunc, r); err != nil {
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switch err {
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case gEXCEPTION_EXIT:
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break
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case gEXCEPTION_EXIT_ALL:
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fallthrough
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case gEXCEPTION_EXIT_HOOK:
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return
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default:
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r.Response.WriteStatus(http.StatusInternalServerError, err)
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panic(err)
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}
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}
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}
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// Restore the old router variable map.
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r.routerMap = oldRouterMap
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}
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}
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// getHookHandlers retrieves and returns the hook handlers of specified hook.
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func (r *Request) getHookHandlers(hook string) []*handlerParsedItem {
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if !r.hasHookHandler {
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return nil
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}
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parsedItems := make([]*handlerParsedItem, 0, 4)
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for _, v := range r.handlers {
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if v.handler.hookName != hook {
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continue
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}
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item := v
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parsedItems = append(parsedItems, item)
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}
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return parsedItems
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}
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// niceCallHookHandler nicely calls the hook handler function,
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// which means it automatically catches and returns the possible panic error to
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// avoid goroutine crash.
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func (s *Server) niceCallHookHandler(f HandlerFunc, r *Request) (err interface{}) {
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defer func() {
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err = recover()
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}()
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f(r)
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return
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}
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