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virtualhost.go
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virtualhost.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 router
import (
"regexp"
"sync"
"sofastack.io/sofa-mosn/pkg/api/v2"
"sofastack.io/sofa-mosn/pkg/log"
"sofastack.io/sofa-mosn/pkg/types"
)
type VirtualHostImpl struct {
virtualHostName string
mutex sync.RWMutex
routes []RouteBase
fastIndex map[string]map[string]types.Route
globalRouteConfig *configImpl
requestHeadersParser *headerParser
responseHeadersParser *headerParser
}
func (vh *VirtualHostImpl) Name() string {
return vh.virtualHostName
}
func (vh *VirtualHostImpl) addRouteBase(route *v2.Router) error {
base, err := NewRouteRuleImplBase(vh, route)
if err != nil {
log.DefaultLogger.Errorf(RouterLogFormat, "virtualhost", "addRouteBase", err)
return err
}
var router RouteBase
if route.Match.Prefix != "" {
router = &PrefixRouteRuleImpl{
RouteRuleImplBase: base,
prefix: route.Match.Prefix,
}
} else if route.Match.Path != "" {
router = &PathRouteRuleImpl{
RouteRuleImplBase: base,
path: route.Match.Path,
}
} else if route.Match.Regex != "" {
regPattern, err := regexp.Compile(route.Match.Regex)
if err != nil {
log.DefaultLogger.Errorf(RouterLogFormat, "virtualhost", "addRouteBase", err)
return err
}
router = &RegexRouteRuleImpl{
RouteRuleImplBase: base,
regexStr: route.Match.Regex,
regexPattern: regPattern,
}
} else {
if router = defaultRouterRuleFactoryOrder.factory(base, route.Match.Headers); router == nil {
log.DefaultLogger.Errorf(RouterLogFormat, "virtualhost", "addRouteBase", "create default router failed")
return ErrRouterFactory
}
}
if router != nil {
vh.mutex.Lock()
vh.routes = append(vh.routes, router)
// make fast index, used in certain scenarios
// TODO: rule can be extended
if len(route.Match.Headers) == 1 && !route.Match.Headers[0].Regex {
key := route.Match.Headers[0].Name
value := route.Match.Headers[0].Value
valueMap, ok := vh.fastIndex[key]
if !ok {
valueMap = make(map[string]types.Route)
vh.fastIndex[key] = valueMap
}
valueMap[value] = router
}
vh.mutex.Unlock()
log.DefaultLogger.Infof(RouterLogFormat, "virtualhost", "addRouteBase", "add a new route rule")
} else {
log.DefaultLogger.Errorf(RouterLogFormat, "virtualhost", "addRouteBase", "add a new route rule failed")
}
return nil
}
func (vh *VirtualHostImpl) GetRouteFromEntries(headers types.HeaderMap, randomValue uint64) types.Route {
vh.mutex.RLock()
defer vh.mutex.RUnlock()
for _, route := range vh.routes {
if routeEntry := route.Match(headers, randomValue); routeEntry != nil {
return routeEntry
}
}
return nil
}
func (vh *VirtualHostImpl) GetAllRoutesFromEntries(headers types.HeaderMap, randomValue uint64) []types.Route {
vh.mutex.RLock()
defer vh.mutex.RUnlock()
var routes []types.Route
for _, route := range vh.routes {
if r := route.Match(headers, randomValue); r != nil {
routes = append(routes, r)
}
}
return routes
}
func (vh *VirtualHostImpl) GetRouteFromHeaderKV(key, value string) types.Route {
vh.mutex.RLock()
defer vh.mutex.RUnlock()
if m, ok := vh.fastIndex[key]; ok {
if r, ok := m[value]; ok {
return r
}
}
return nil
}
func (vh *VirtualHostImpl) AddRoute(route *v2.Router) error {
return vh.addRouteBase(route)
}
func (vh *VirtualHostImpl) RemoveAllRoutes() {
vh.mutex.Lock()
defer vh.mutex.Unlock()
// clear the value map
vh.fastIndex = make(map[string]map[string]types.Route)
// clear the routes
vh.routes = vh.routes[:0]
return
}
func NewVirtualHostImpl(virtualHost *v2.VirtualHost) (*VirtualHostImpl, error) {
vhImpl := &VirtualHostImpl{
virtualHostName: virtualHost.Name,
fastIndex: make(map[string]map[string]types.Route),
requestHeadersParser: getHeaderParser(virtualHost.RequestHeadersToAdd, nil),
responseHeadersParser: getHeaderParser(virtualHost.ResponseHeadersToAdd, virtualHost.ResponseHeadersToRemove),
}
for _, route := range virtualHost.Routers {
if err := vhImpl.addRouteBase(&route); err != nil {
return nil, err
}
}
return vhImpl, nil
}