frp/server/proxy/http.go

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// Copyright 2019 fatedier, fatedier@gmail.com
//
// Licensed 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 proxy
import (
"io"
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"net"
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"strings"
"github.com/fatedier/frp/models/config"
"github.com/fatedier/frp/server/metrics"
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frpNet "github.com/fatedier/frp/utils/net"
"github.com/fatedier/frp/utils/util"
"github.com/fatedier/frp/utils/vhost"
frpIo "github.com/fatedier/golib/io"
)
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type HTTPProxy struct {
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*BaseProxy
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cfg *config.HTTPProxyConf
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closeFuncs []func()
}
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func (pxy *HTTPProxy) Run() (remoteAddr string, err error) {
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xl := pxy.xl
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routeConfig := vhost.RouteConfig{
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RewriteHost: pxy.cfg.HostHeaderRewrite,
Headers: pxy.cfg.Headers,
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Username: pxy.cfg.HTTPUser,
Password: pxy.cfg.HTTPPwd,
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CreateConnFn: pxy.GetRealConn,
}
locations := pxy.cfg.Locations
if len(locations) == 0 {
locations = []string{""}
}
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defer func() {
if err != nil {
pxy.Close()
}
}()
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addrs := make([]string, 0)
for _, domain := range pxy.cfg.CustomDomains {
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if domain == "" {
continue
}
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routeConfig.Domain = domain
for _, location := range locations {
routeConfig.Location = location
tmpDomain := routeConfig.Domain
tmpLocation := routeConfig.Location
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// handle group
if pxy.cfg.Group != "" {
err = pxy.rc.HTTPGroupCtl.Register(pxy.name, pxy.cfg.Group, pxy.cfg.GroupKey, routeConfig)
if err != nil {
return
}
pxy.closeFuncs = append(pxy.closeFuncs, func() {
pxy.rc.HTTPGroupCtl.UnRegister(pxy.name, pxy.cfg.Group, tmpDomain, tmpLocation)
})
} else {
// no group
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err = pxy.rc.HTTPReverseProxy.Register(routeConfig)
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if err != nil {
return
}
pxy.closeFuncs = append(pxy.closeFuncs, func() {
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pxy.rc.HTTPReverseProxy.UnRegister(tmpDomain, tmpLocation)
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})
}
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addrs = append(addrs, util.CanonicalAddr(routeConfig.Domain, int(pxy.serverCfg.VhostHTTPPort)))
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xl.Info("http proxy listen for host [%s] location [%s] group [%s]", routeConfig.Domain, routeConfig.Location, pxy.cfg.Group)
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}
}
if pxy.cfg.SubDomain != "" {
routeConfig.Domain = pxy.cfg.SubDomain + "." + pxy.serverCfg.SubDomainHost
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for _, location := range locations {
routeConfig.Location = location
tmpDomain := routeConfig.Domain
tmpLocation := routeConfig.Location
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// handle group
if pxy.cfg.Group != "" {
err = pxy.rc.HTTPGroupCtl.Register(pxy.name, pxy.cfg.Group, pxy.cfg.GroupKey, routeConfig)
if err != nil {
return
}
pxy.closeFuncs = append(pxy.closeFuncs, func() {
pxy.rc.HTTPGroupCtl.UnRegister(pxy.name, pxy.cfg.Group, tmpDomain, tmpLocation)
})
} else {
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err = pxy.rc.HTTPReverseProxy.Register(routeConfig)
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if err != nil {
return
}
pxy.closeFuncs = append(pxy.closeFuncs, func() {
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pxy.rc.HTTPReverseProxy.UnRegister(tmpDomain, tmpLocation)
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})
}
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addrs = append(addrs, util.CanonicalAddr(tmpDomain, pxy.serverCfg.VhostHTTPPort))
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xl.Info("http proxy listen for host [%s] location [%s] group [%s]", routeConfig.Domain, routeConfig.Location, pxy.cfg.Group)
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}
}
remoteAddr = strings.Join(addrs, ",")
return
}
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func (pxy *HTTPProxy) GetConf() config.ProxyConf {
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return pxy.cfg
}
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func (pxy *HTTPProxy) GetRealConn(remoteAddr string) (workConn net.Conn, err error) {
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xl := pxy.xl
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rAddr, errRet := net.ResolveTCPAddr("tcp", remoteAddr)
if errRet != nil {
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xl.Warn("resolve TCP addr [%s] error: %v", remoteAddr, errRet)
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// we do not return error here since remoteAddr is not necessary for proxies without proxy protocol enabled
}
tmpConn, errRet := pxy.GetWorkConnFromPool(rAddr, nil)
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if errRet != nil {
err = errRet
return
}
var rwc io.ReadWriteCloser = tmpConn
if pxy.cfg.UseEncryption {
rwc, err = frpIo.WithEncryption(rwc, []byte(pxy.serverCfg.Token))
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if err != nil {
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xl.Error("create encryption stream error: %v", err)
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return
}
}
if pxy.cfg.UseCompression {
rwc = frpIo.WithCompression(rwc)
}
workConn = frpNet.WrapReadWriteCloserToConn(rwc, tmpConn)
workConn = frpNet.WrapStatsConn(workConn, pxy.updateStatsAfterClosedConn)
metrics.Server.OpenConnection(pxy.GetName(), pxy.GetConf().GetBaseInfo().ProxyType)
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return
}
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func (pxy *HTTPProxy) updateStatsAfterClosedConn(totalRead, totalWrite int64) {
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name := pxy.GetName()
proxyType := pxy.GetConf().GetBaseInfo().ProxyType
metrics.Server.CloseConnection(name, proxyType)
metrics.Server.AddTrafficIn(name, proxyType, totalWrite)
metrics.Server.AddTrafficOut(name, proxyType, totalRead)
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}
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func (pxy *HTTPProxy) Close() {
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pxy.BaseProxy.Close()
for _, closeFn := range pxy.closeFuncs {
closeFn()
}
}