mirror of
https://gitee.com/johng/gf.git
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232 lines
7.4 KiB
Go
232 lines
7.4 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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"encoding/json"
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"fmt"
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"strings"
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"github.com/gogf/gf/container/glist"
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"github.com/gogf/gf/text/gregex"
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)
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// handlerCacheItem is an item just for internal router searching cache.
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type handlerCacheItem struct {
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parsedItems []*handlerParsedItem
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hasHook bool
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hasServe bool
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}
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// serveHandlerKey creates and returns a handler key for router.
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func (s *Server) serveHandlerKey(method, path, domain string) string {
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if len(domain) > 0 {
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domain = "@" + domain
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}
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if method == "" {
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return path + strings.ToLower(domain)
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}
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return strings.ToUpper(method) + ":" + path + strings.ToLower(domain)
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}
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// getHandlersWithCache searches the router item with cache feature for given request.
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func (s *Server) getHandlersWithCache(r *Request) (parsedItems []*handlerParsedItem, hasHook, hasServe bool) {
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method := r.Method
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// Special http method OPTIONS handling.
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// It searches the handler with the request method instead of OPTIONS method.
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if method == "OPTIONS" {
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if v := r.Request.Header.Get("Access-Control-Request-Method"); v != "" {
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method = v
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}
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}
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// Search and cache the router handlers.
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value := s.serveCache.GetOrSetFunc(s.serveHandlerKey(method, r.URL.Path, r.GetHost()), func() interface{} {
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parsedItems, hasHook, hasServe = s.searchHandlers(method, r.URL.Path, r.GetHost())
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if parsedItems != nil {
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return &handlerCacheItem{parsedItems, hasHook, hasServe}
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}
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return nil
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}, gROUTE_CACHE_DURATION)
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if value != nil {
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item := value.(*handlerCacheItem)
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return item.parsedItems, item.hasHook, item.hasServe
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}
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return
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}
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// searchHandlers retrieves and returns the routers with given parameters.
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// Note that the returned routers contain serving handler, middleware handlers and hook handlers.
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func (s *Server) searchHandlers(method, path, domain string) (parsedItems []*handlerParsedItem, hasHook, hasServe bool) {
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if len(path) == 0 {
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return nil, false, false
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}
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// Split the URL.path to separate parts.
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var array []string
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if strings.EqualFold("/", path) {
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array = []string{"/"}
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} else {
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array = strings.Split(path[1:], "/")
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}
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parsedItemList := glist.New()
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lastMiddlewareElem := (*glist.Element)(nil)
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repeatHandlerCheckMap := make(map[int]struct{}, 16)
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// Default domain has the most priority when iteration.
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for _, domain := range []string{gDEFAULT_DOMAIN, domain} {
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p, ok := s.serveTree[domain]
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if !ok {
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continue
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}
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// Make a list array with capacity of 16.
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lists := make([]*glist.List, 0, 16)
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for i, part := range array {
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// In case of double '/' URI, eg: /user//index
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if part == "" {
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continue
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}
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// Add all list of each node to the list array.
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if v, ok := p.(map[string]interface{})["*list"]; ok {
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lists = append(lists, v.(*glist.List))
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}
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if v, ok := p.(map[string]interface{})[part]; ok {
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// Loop to the next node by certain key name.
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p = v
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if i == len(array)-1 {
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if v, ok := p.(map[string]interface{})["*list"]; ok {
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lists = append(lists, v.(*glist.List))
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break
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}
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}
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} else if v, ok := p.(map[string]interface{})["*fuzz"]; ok {
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// Loop to the next node by fuzzy node item.
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p = v
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}
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if i == len(array)-1 {
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// It here also checks the fuzzy item,
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// for rule case like: "/user/*action" matches to "/user".
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if v, ok := p.(map[string]interface{})["*fuzz"]; ok {
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p = v
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}
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// The leaf must have a list item. It adds the list to the list array.
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if v, ok := p.(map[string]interface{})["*list"]; ok {
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lists = append(lists, v.(*glist.List))
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}
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}
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}
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// OK, let's loop the result list array, adding the handler item to the result handler result array.
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// As the tail of the list array has the most priority, it iterates the list array from its tail to head.
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for i := len(lists) - 1; i >= 0; i-- {
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for e := lists[i].Front(); e != nil; e = e.Next() {
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item := e.Value.(*handlerItem)
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// Filter repeated handler item, especially the middleware and hook handlers.
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// It is necessary, do not remove this checks logic unless you really know how it is necessary.
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if _, ok := repeatHandlerCheckMap[item.itemId]; ok {
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continue
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} else {
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repeatHandlerCheckMap[item.itemId] = struct{}{}
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}
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// Serving handler can only be added to the handler array just once.
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if hasServe {
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switch item.itemType {
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case gHANDLER_TYPE_HANDLER, gHANDLER_TYPE_OBJECT, gHANDLER_TYPE_CONTROLLER:
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continue
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}
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}
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if item.router.Method == gDEFAULT_METHOD || item.router.Method == method {
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// Note the rule having no fuzzy rules: len(match) == 1
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if match, err := gregex.MatchString(item.router.RegRule, path); err == nil && len(match) > 0 {
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parsedItem := &handlerParsedItem{item, nil}
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// If the rule contains fuzzy names,
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// it needs paring the URL to retrieve the values for the names.
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if len(item.router.RegNames) > 0 {
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if len(match) > len(item.router.RegNames) {
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parsedItem.values = make(map[string]string)
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// It there repeated names, it just overwrites the same one.
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for i, name := range item.router.RegNames {
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parsedItem.values[name] = match[i+1]
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}
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}
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}
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switch item.itemType {
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// The serving handler can be only added just once.
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case gHANDLER_TYPE_HANDLER, gHANDLER_TYPE_OBJECT, gHANDLER_TYPE_CONTROLLER:
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hasServe = true
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parsedItemList.PushBack(parsedItem)
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// The middleware is inserted before the serving handler.
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// If there're multiple middlewares, they're inserted into the result list by their registering order.
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// The middlewares are also executed by their registering order.
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case gHANDLER_TYPE_MIDDLEWARE:
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if lastMiddlewareElem == nil {
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lastMiddlewareElem = parsedItemList.PushFront(parsedItem)
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} else {
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lastMiddlewareElem = parsedItemList.InsertAfter(lastMiddlewareElem, parsedItem)
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}
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// HOOK handler, just push it back to the list.
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case gHANDLER_TYPE_HOOK:
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hasHook = true
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parsedItemList.PushBack(parsedItem)
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default:
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panic(fmt.Sprintf(`invalid handler type %d`, item.itemType))
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}
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}
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}
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}
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}
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}
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if parsedItemList.Len() > 0 {
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index := 0
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parsedItems = make([]*handlerParsedItem, parsedItemList.Len())
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for e := parsedItemList.Front(); e != nil; e = e.Next() {
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parsedItems[index] = e.Value.(*handlerParsedItem)
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index++
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}
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}
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return
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}
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// MarshalJSON implements the interface MarshalJSON for json.Marshal.
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func (item *handlerItem) MarshalJSON() ([]byte, error) {
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switch item.itemType {
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case gHANDLER_TYPE_HOOK:
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return json.Marshal(
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fmt.Sprintf(
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`%s %s:%s (%s)`,
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item.router.Uri,
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item.router.Domain,
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item.router.Method,
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item.hookName,
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),
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)
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case gHANDLER_TYPE_MIDDLEWARE:
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return json.Marshal(
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fmt.Sprintf(
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`%s %s:%s (MIDDLEWARE)`,
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item.router.Uri,
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item.router.Domain,
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item.router.Method,
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),
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)
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default:
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return json.Marshal(
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fmt.Sprintf(
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`%s %s:%s`,
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item.router.Uri,
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item.router.Domain,
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item.router.Method,
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),
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)
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}
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}
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// MarshalJSON implements the interface MarshalJSON for json.Marshal.
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func (item *handlerParsedItem) MarshalJSON() ([]byte, error) {
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return json.Marshal(item.handler)
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}
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