/
ghttp_server_router_group.go
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/
ghttp_server_router_group.go
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// Copyright GoFrame Author(https://github.com/gogf/gf). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.
package ghttp
import (
"fmt"
"github.com/gogf/gf/debug/gdebug"
"reflect"
"strings"
"github.com/gogf/gf/text/gstr"
"github.com/gogf/gf/util/gconv"
)
type (
// RouterGroup is a group wrapping multiple routes and middleware.
RouterGroup struct {
parent *RouterGroup // Parent group.
server *Server // Server.
domain *Domain // Domain.
prefix string // Prefix for sub-route.
middleware []HandlerFunc // Middleware array.
}
// GroupItem is item for router group.
GroupItem = []interface{}
// preBindItem is item for lazy registering feature of router group. preBindItem is not really registered
// to server when route function of the group called but is lazily registered when server starts.
preBindItem struct {
group *RouterGroup
bindType string
pattern string
object interface{} // Can be handler, controller or object.
params []interface{} // Extra parameters for route registering depending on the type.
source string // Handler is register at certain source file path:line.
bound bool // Is this item bound to server.
}
)
var (
preBindItems = make([]*preBindItem, 0, 64)
)
// handlePreBindItems is called when server starts, which does really route registering to the server.
func (s *Server) handlePreBindItems() {
if len(preBindItems) == 0 {
return
}
for _, item := range preBindItems {
if item.bound {
continue
}
// Handle the items of current server.
if item.group.server != nil && item.group.server != s {
continue
}
if item.group.domain != nil && item.group.domain.server != s {
continue
}
item.group.doBindRoutersToServer(item)
item.bound = true
}
}
// Group creates and returns a RouterGroup object.
func (s *Server) Group(prefix string, groups ...func(group *RouterGroup)) *RouterGroup {
if len(prefix) > 0 && prefix[0] != '/' {
prefix = "/" + prefix
}
if prefix == "/" {
prefix = ""
}
group := &RouterGroup{
server: s,
prefix: prefix,
}
if len(groups) > 0 {
for _, v := range groups {
v(group)
}
}
return group
}
// Group creates and returns a RouterGroup object, which is bound to a specified domain.
func (d *Domain) Group(prefix string, groups ...func(group *RouterGroup)) *RouterGroup {
if len(prefix) > 0 && prefix[0] != '/' {
prefix = "/" + prefix
}
if prefix == "/" {
prefix = ""
}
group := &RouterGroup{
domain: d,
prefix: prefix,
}
if len(groups) > 0 {
for _, v := range groups {
v(group)
}
}
return group
}
// Group creates and returns a sub-group of current router group.
func (g *RouterGroup) Group(prefix string, groups ...func(group *RouterGroup)) *RouterGroup {
if prefix == "/" {
prefix = ""
}
group := &RouterGroup{
parent: g,
server: g.server,
domain: g.domain,
prefix: prefix,
}
if len(g.middleware) > 0 {
group.middleware = make([]HandlerFunc, len(g.middleware))
copy(group.middleware, g.middleware)
}
if len(groups) > 0 {
for _, v := range groups {
v(group)
}
}
return group
}
// Clone returns a new router group which is a clone of current group.
func (g *RouterGroup) Clone() *RouterGroup {
newGroup := &RouterGroup{
parent: g.parent,
server: g.server,
domain: g.domain,
prefix: g.prefix,
middleware: make([]HandlerFunc, len(g.middleware)),
}
copy(newGroup.middleware, g.middleware)
return newGroup
}
// Bind does batch route registering feature for router group.
func (g *RouterGroup) Bind(items []GroupItem) *RouterGroup {
group := g.Clone()
for _, item := range items {
if len(item) < 3 {
g.server.Logger().Fatalf("invalid router item: %s", item)
}
bindType := gstr.ToUpper(gconv.String(item[0]))
switch bindType {
case "REST":
group.preBindToLocalArray("REST", gconv.String(item[0])+":"+gconv.String(item[1]), item[2])
case "MIDDLEWARE":
group.preBindToLocalArray("MIDDLEWARE", gconv.String(item[0])+":"+gconv.String(item[1]), item[2])
default:
if strings.EqualFold(bindType, "ALL") {
bindType = ""
} else {
bindType += ":"
}
if len(item) > 3 {
group.preBindToLocalArray("HANDLER", bindType+gconv.String(item[1]), item[2], item[3])
} else {
group.preBindToLocalArray("HANDLER", bindType+gconv.String(item[1]), item[2])
}
}
}
return group
}
// ALL registers a http handler to given route pattern and all http methods.
func (g *RouterGroup) ALL(pattern string, object interface{}, params ...interface{}) *RouterGroup {
return g.Clone().preBindToLocalArray("HANDLER", defaultMethod+":"+pattern, object, params...)
}
// ALLMap registers http handlers for http methods using map.
func (g *RouterGroup) ALLMap(m map[string]interface{}) {
for pattern, object := range m {
g.ALL(pattern, object)
}
}
// GET registers a http handler to given route pattern and http method: GET.
func (g *RouterGroup) GET(pattern string, object interface{}, params ...interface{}) *RouterGroup {
return g.Clone().preBindToLocalArray("HANDLER", "GET:"+pattern, object, params...)
}
// PUT registers a http handler to given route pattern and http method: PUT.
func (g *RouterGroup) PUT(pattern string, object interface{}, params ...interface{}) *RouterGroup {
return g.Clone().preBindToLocalArray("HANDLER", "PUT:"+pattern, object, params...)
}
// POST registers a http handler to given route pattern and http method: POST.
func (g *RouterGroup) POST(pattern string, object interface{}, params ...interface{}) *RouterGroup {
return g.Clone().preBindToLocalArray("HANDLER", "POST:"+pattern, object, params...)
}
// DELETE registers a http handler to given route pattern and http method: DELETE.
func (g *RouterGroup) DELETE(pattern string, object interface{}, params ...interface{}) *RouterGroup {
return g.Clone().preBindToLocalArray("HANDLER", "DELETE:"+pattern, object, params...)
}
// PATCH registers a http handler to given route pattern and http method: PATCH.
func (g *RouterGroup) PATCH(pattern string, object interface{}, params ...interface{}) *RouterGroup {
return g.Clone().preBindToLocalArray("HANDLER", "PATCH:"+pattern, object, params...)
}
// HEAD registers a http handler to given route pattern and http method: HEAD.
func (g *RouterGroup) HEAD(pattern string, object interface{}, params ...interface{}) *RouterGroup {
return g.Clone().preBindToLocalArray("HANDLER", "HEAD:"+pattern, object, params...)
}
// CONNECT registers a http handler to given route pattern and http method: CONNECT.
func (g *RouterGroup) CONNECT(pattern string, object interface{}, params ...interface{}) *RouterGroup {
return g.Clone().preBindToLocalArray("HANDLER", "CONNECT:"+pattern, object, params...)
}
// OPTIONS registers a http handler to given route pattern and http method: OPTIONS.
func (g *RouterGroup) OPTIONS(pattern string, object interface{}, params ...interface{}) *RouterGroup {
return g.Clone().preBindToLocalArray("HANDLER", "OPTIONS:"+pattern, object, params...)
}
// TRACE registers a http handler to given route pattern and http method: TRACE.
func (g *RouterGroup) TRACE(pattern string, object interface{}, params ...interface{}) *RouterGroup {
return g.Clone().preBindToLocalArray("HANDLER", "TRACE:"+pattern, object, params...)
}
// REST registers a http handler to given route pattern according to REST rule.
func (g *RouterGroup) REST(pattern string, object interface{}) *RouterGroup {
return g.Clone().preBindToLocalArray("REST", pattern, object)
}
// Hook registers a hook to given route pattern.
func (g *RouterGroup) Hook(pattern string, hook string, handler HandlerFunc) *RouterGroup {
return g.Clone().preBindToLocalArray("HANDLER", pattern, handler, hook)
}
// Middleware binds one or more middleware to the router group.
func (g *RouterGroup) Middleware(handlers ...HandlerFunc) *RouterGroup {
g.middleware = append(g.middleware, handlers...)
return g
}
// preBindToLocalArray adds the route registering parameters to internal variable array for lazily registering feature.
func (g *RouterGroup) preBindToLocalArray(bindType string, pattern string, object interface{}, params ...interface{}) *RouterGroup {
_, file, line := gdebug.CallerWithFilter(gFILTER_KEY)
preBindItems = append(preBindItems, &preBindItem{
group: g,
bindType: bindType,
pattern: pattern,
object: object,
params: params,
source: fmt.Sprintf(`%s:%d`, file, line),
})
return g
}
// getPrefix returns the route prefix of the group, which recursively retrieves its parent's prefixo.
func (g *RouterGroup) getPrefix() string {
prefix := g.prefix
parent := g.parent
for parent != nil {
prefix = parent.prefix + prefix
parent = parent.parent
}
return prefix
}
// doBindRoutersToServer does really registering for the group.
func (g *RouterGroup) doBindRoutersToServer(item *preBindItem) *RouterGroup {
var (
bindType = item.bindType
pattern = item.pattern
object = item.object
params = item.params
source = item.source
)
prefix := g.getPrefix()
// Route check.
if len(prefix) > 0 {
domain, method, path, err := g.server.parsePattern(pattern)
if err != nil {
g.server.Logger().Fatalf("invalid pattern: %s", pattern)
}
// If there'a already a domain, unset the domain field in the pattern.
if g.domain != nil {
domain = ""
}
if bindType == "REST" {
pattern = prefix + "/" + strings.TrimLeft(path, "/")
} else {
pattern = g.server.serveHandlerKey(
method, prefix+"/"+strings.TrimLeft(path, "/"), domain,
)
}
}
// Filter repeated char '/'.
pattern = gstr.Replace(pattern, "//", "/")
// Convert params to string array.
extras := gconv.Strings(params)
// Check whether it's a hook handler.
if _, ok := object.(HandlerFunc); ok && len(extras) > 0 {
bindType = "HOOK"
}
switch bindType {
case "HANDLER":
if h, ok := object.(HandlerFunc); ok {
if g.server != nil {
g.server.doBindHandler(pattern, h, g.middleware, source)
} else {
g.domain.doBindHandler(pattern, h, g.middleware, source)
}
} else if g.isController(object) {
if len(extras) > 0 {
if g.server != nil {
if gstr.Contains(extras[0], ",") {
g.server.doBindController(
pattern, object.(Controller), extras[0], g.middleware, source,
)
} else {
g.server.doBindControllerMethod(
pattern, object.(Controller), extras[0], g.middleware, source,
)
}
} else {
if gstr.Contains(extras[0], ",") {
g.domain.doBindController(
pattern, object.(Controller), extras[0], g.middleware, source,
)
} else {
g.domain.doBindControllerMethod(
pattern, object.(Controller), extras[0], g.middleware, source,
)
}
}
} else {
if g.server != nil {
g.server.doBindController(
pattern, object.(Controller), "", g.middleware, source,
)
} else {
g.domain.doBindController(
pattern, object.(Controller), "", g.middleware, source,
)
}
}
} else {
if len(extras) > 0 {
if g.server != nil {
if gstr.Contains(extras[0], ",") {
g.server.doBindObject(
pattern, object, extras[0], g.middleware, source,
)
} else {
g.server.doBindObjectMethod(
pattern, object, extras[0], g.middleware, source,
)
}
} else {
if gstr.Contains(extras[0], ",") {
g.domain.doBindObject(
pattern, object, extras[0], g.middleware, source,
)
} else {
g.domain.doBindObjectMethod(
pattern, object, extras[0], g.middleware, source,
)
}
}
} else {
if g.server != nil {
g.server.doBindObject(pattern, object, "", g.middleware, source)
} else {
g.domain.doBindObject(pattern, object, "", g.middleware, source)
}
}
}
case "REST":
if g.isController(object) {
if g.server != nil {
g.server.doBindControllerRest(
pattern, object.(Controller), g.middleware, source,
)
} else {
g.domain.doBindControllerRest(
pattern, object.(Controller), g.middleware, source,
)
}
} else {
if g.server != nil {
g.server.doBindObjectRest(pattern, object, g.middleware, source)
} else {
g.domain.doBindObjectRest(pattern, object, g.middleware, source)
}
}
case "HOOK":
if h, ok := object.(HandlerFunc); ok {
if g.server != nil {
g.server.doBindHookHandler(pattern, extras[0], h, source)
} else {
g.domain.doBindHookHandler(pattern, extras[0], h, source)
}
} else {
g.server.Logger().Fatalf("invalid hook handler for pattern: %s", pattern)
}
}
return g
}
// isController checks and returns whether given <value> is a controller.
// A controller should contains attributes: Request/Response/Server/Cookie/Session/View.
func (g *RouterGroup) isController(value interface{}) bool {
// Whether implements interface Controller.
if _, ok := value.(Controller); !ok {
return false
}
// Check the necessary attributes.
v := reflect.ValueOf(value)
if v.Kind() == reflect.Ptr {
v = v.Elem()
}
if v.FieldByName("Request").IsValid() &&
v.FieldByName("Response").IsValid() &&
v.FieldByName("Server").IsValid() &&
v.FieldByName("Cookie").IsValid() &&
v.FieldByName("Session").IsValid() &&
v.FieldByName("View").IsValid() {
return true
}
return false
}