frp/server/group/http.go

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2019-07-31 00:41:58 +08:00
package group
import (
"fmt"
"sync"
"sync/atomic"
frpNet "github.com/fatedier/frp/utils/net"
"github.com/fatedier/frp/utils/vhost"
)
type HTTPGroupController struct {
groups map[string]*HTTPGroup
vhostRouter *vhost.VhostRouters
mu sync.Mutex
}
func NewHTTPGroupController(vhostRouter *vhost.VhostRouters) *HTTPGroupController {
return &HTTPGroupController{
groups: make(map[string]*HTTPGroup),
vhostRouter: vhostRouter,
}
}
func (ctl *HTTPGroupController) Register(proxyName, group, groupKey string,
routeConfig vhost.VhostRouteConfig) (err error) {
indexKey := httpGroupIndex(group, routeConfig.Domain, routeConfig.Location)
ctl.mu.Lock()
g, ok := ctl.groups[indexKey]
if !ok {
g = NewHTTPGroup(ctl)
ctl.groups[indexKey] = g
}
ctl.mu.Unlock()
return g.Register(proxyName, group, groupKey, routeConfig)
}
func (ctl *HTTPGroupController) UnRegister(proxyName, group, domain, location string) {
indexKey := httpGroupIndex(group, domain, location)
ctl.mu.Lock()
defer ctl.mu.Unlock()
g, ok := ctl.groups[indexKey]
if !ok {
return
}
isEmpty := g.UnRegister(proxyName)
if isEmpty {
delete(ctl.groups, indexKey)
}
}
type HTTPGroup struct {
group string
groupKey string
domain string
location string
createFuncs map[string]vhost.CreateConnFunc
pxyNames []string
index uint64
ctl *HTTPGroupController
mu sync.RWMutex
}
func NewHTTPGroup(ctl *HTTPGroupController) *HTTPGroup {
return &HTTPGroup{
createFuncs: make(map[string]vhost.CreateConnFunc),
pxyNames: make([]string, 0),
ctl: ctl,
}
}
func (g *HTTPGroup) Register(proxyName, group, groupKey string,
routeConfig vhost.VhostRouteConfig) (err error) {
g.mu.Lock()
defer g.mu.Unlock()
if len(g.createFuncs) == 0 {
// the first proxy in this group
tmp := routeConfig // copy object
tmp.CreateConnFn = g.createConn
err = g.ctl.vhostRouter.Add(routeConfig.Domain, routeConfig.Location, &tmp)
if err != nil {
return
}
g.group = group
g.groupKey = groupKey
g.domain = routeConfig.Domain
g.location = routeConfig.Location
} else {
if g.group != group || g.domain != routeConfig.Domain || g.location != routeConfig.Location {
err = ErrGroupParamsInvalid
return
}
if g.groupKey != groupKey {
err = ErrGroupAuthFailed
return
}
}
if _, ok := g.createFuncs[proxyName]; ok {
err = ErrProxyRepeated
return
}
g.createFuncs[proxyName] = routeConfig.CreateConnFn
g.pxyNames = append(g.pxyNames, proxyName)
return nil
}
func (g *HTTPGroup) UnRegister(proxyName string) (isEmpty bool) {
g.mu.Lock()
defer g.mu.Unlock()
delete(g.createFuncs, proxyName)
for i, name := range g.pxyNames {
if name == proxyName {
g.pxyNames = append(g.pxyNames[:i], g.pxyNames[i+1:]...)
break
}
}
if len(g.createFuncs) == 0 {
isEmpty = true
g.ctl.vhostRouter.Del(g.domain, g.location)
}
return
}
func (g *HTTPGroup) createConn(remoteAddr string) (frpNet.Conn, error) {
var f vhost.CreateConnFunc
newIndex := atomic.AddUint64(&g.index, 1)
g.mu.RLock()
group := g.group
domain := g.domain
location := g.location
if len(g.pxyNames) > 0 {
name := g.pxyNames[int(newIndex)%len(g.pxyNames)]
f, _ = g.createFuncs[name]
}
g.mu.RUnlock()
if f == nil {
return nil, fmt.Errorf("no CreateConnFunc for http group [%s], domain [%s], location [%s]", group, domain, location)
}
return f(remoteAddr)
}
func httpGroupIndex(group, domain, location string) string {
return fmt.Sprintf("%s_%s_%s", group, domain, location)
}