XiaoMo/frp
1
0
Fork 0
mirror of https://github.com/fatedier/frp.git synced 2025-07-27 07:35:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

lint by golangci-lint (#3080)

Browse Source
This commit is contained in:
fatedier
2022-08-29 01:02:53 +08:00
committed by GitHub
parent f4e4fbea62
commit 9d077b02cf
122 changed files with 947 additions and 1331 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
pkg/util/log/log.go
View File

@@ -40,19 +40,19 @@ func SetLogFile(logWay string, logFile string, maxdays int64, disableLogColor bo
if logWay == "console" {
params := ""
if disableLogColor {
params = fmt.Sprintf(`{"color": false}`)
params = `{"color": false}`
}
Log.SetLogger("console", params)
_ = Log.SetLogger("console", params)
} else {
params := fmt.Sprintf(`{"filename": "%s", "maxdays": %d}`, logFile, maxdays)
Log.SetLogger("file", params)
_ = Log.SetLogger("file", params)
}
}
// SetLogLevel set log level, default is warning
// value: error, warning, info, debug, trace
func SetLogLevel(logLevel string) {
level := 4 // warning
var level int
switch logLevel {
case "error":
level = 3
@@ -65,7 +65,7 @@ func SetLogLevel(logLevel string) {
case "trace":
level = 8
default:
level = 4
level = 4 // warning
}
Log.SetLevel(level)
}

4
pkg/util/net/kcp.go
View File

@@ -32,8 +32,8 @@ func ListenKcp(address string) (l *KCPListener, err error) {
if err != nil {
return l, err
}
listener.SetReadBuffer(4194304)
listener.SetWriteBuffer(4194304)
_ = listener.SetReadBuffer(4194304)
_ = listener.SetWriteBuffer(4194304)
l = &KCPListener{
listener: listener,

16
pkg/util/net/tls.go
View File

@@ -23,32 +23,30 @@ import (
gnet "github.com/fatedier/golib/net"
)
var (
FRPTLSHeadByte = 0x17
)
var FRPTLSHeadByte = 0x17
func CheckAndEnableTLSServerConnWithTimeout(
c net.Conn, tlsConfig *tls.Config, tlsOnly bool, timeout time.Duration,
) (out net.Conn, isTLS bool, custom bool, err error) {
sc, r := gnet.NewSharedConnSize(c, 2)
buf := make([]byte, 1)
var n int
c.SetReadDeadline(time.Now().Add(timeout))
_ = c.SetReadDeadline(time.Now().Add(timeout))
n, err = r.Read(buf)
c.SetReadDeadline(time.Time{})
_ = c.SetReadDeadline(time.Time{})
if err != nil {
return
}
if n == 1 && int(buf[0]) == FRPTLSHeadByte {
switch {
case n == 1 && int(buf[0]) == FRPTLSHeadByte:
out = tls.Server(c, tlsConfig)
isTLS = true
custom = true
} else if n == 1 && int(buf[0]) == 0x16 {
case n == 1 && int(buf[0]) == 0x16:
out = tls.Server(sc, tlsConfig)
isTLS = true
} else {
default:
if tlsOnly {
err = fmt.Errorf("non-TLS connection received on a TlsOnly server")
return

9
pkg/util/net/udp.go
View File

@@ -55,7 +55,7 @@ func NewFakeUDPConn(l *UDPListener, laddr, raddr net.Addr) *FakeUDPConn {
for {
time.Sleep(5 * time.Second)
fc.mu.RLock()
if time.Now().Sub(fc.lastActive) > 10*time.Second {
if time.Since(fc.lastActive) > 10*time.Second {
fc.mu.RUnlock()
fc.Close()
break
@@ -68,8 +68,7 @@ func NewFakeUDPConn(l *UDPListener, laddr, raddr net.Addr) *FakeUDPConn {
func (c *FakeUDPConn) putPacket(content []byte) {
defer func() {
if err := recover(); err != nil {
}
_ = recover()
}()
select {
@@ -109,7 +108,7 @@ func (c *FakeUDPConn) Write(b []byte) (n int, err error) {
LocalAddr: c.localAddr,
RemoteAddr: c.remoteAddr,
}
c.l.writeUDPPacket(packet)
_ = c.l.writeUDPPacket(packet)
c.mu.Lock()
c.lastActive = time.Now()
@@ -208,7 +207,7 @@ func ListenUDP(bindAddr string, bindPort int) (l *UDPListener, err error) {
}
if addr, ok := packet.RemoteAddr.(*net.UDPAddr); ok {
readConn.WriteToUDP(packet.Buf, addr)
_, _ = readConn.WriteToUDP(packet.Buf, addr)
}
}
}()

11
pkg/util/net/websocket.go
View File

@@ -9,9 +9,7 @@ import (
"golang.org/x/net/websocket"
)
var (
ErrWebsocketListenerClosed = errors.New("websocket listener closed")
)
var ErrWebsocketListenerClosed = errors.New("websocket listener closed")
const (
FrpWebsocketPath = "/~!frp"
@@ -21,8 +19,7 @@ type WebsocketListener struct {
ln net.Listener
acceptCh chan net.Conn
server *http.Server
httpMutex *http.ServeMux
server *http.Server
}
// NewWebsocketListener to handle websocket connections
@@ -47,7 +44,9 @@ func NewWebsocketListener(ln net.Listener) (wl *WebsocketListener) {
Handler: muxer,
}
go wl.server.Serve(ln)
go func() {
_ = wl.server.Serve(ln)
}()
return
}

17
pkg/util/tcpmux/httpconnect.go
View File

@@ -22,9 +22,10 @@ import (
"net/http"
"time"
gnet "github.com/fatedier/golib/net"
"github.com/fatedier/frp/pkg/util/util"
"github.com/fatedier/frp/pkg/util/vhost"
gnet "github.com/fatedier/golib/net"
)
type HTTPConnectTCPMuxer struct {
@@ -66,7 +67,11 @@ func (muxer *HTTPConnectTCPMuxer) sendConnectResponse(c net.Conn, reqInfo map[st
if muxer.passthrough {
return nil
}
return util.OkResponse().Write(c)
res := util.OkResponse()
if res.Body != nil {
defer res.Body.Close()
}
return res.Write(c)
}
func (muxer *HTTPConnectTCPMuxer) getHostFromHTTPConnect(c net.Conn) (net.Conn, map[string]string, error) {
@@ -82,11 +87,15 @@ func (muxer *HTTPConnectTCPMuxer) getHostFromHTTPConnect(c net.Conn) (net.Conn,
reqInfoMap["Scheme"] = "tcp"
reqInfoMap["HTTPUser"] = httpUser
var outConn net.Conn = c
outConn := c
if muxer.passthrough {
outConn = sc
if muxer.authRequired && httpUser == "" {
util.ProxyUnauthorizedResponse().Write(c)
resp := util.ProxyUnauthorizedResponse()
if resp.Body != nil {
defer resp.Body.Close()
}
_ = resp.Write(c)
outConn = c
}
}

6
pkg/util/util/http.go
View File

@@ -60,10 +60,8 @@ func CanonicalHost(host string) (string, error) {
return "", err
}
}
if strings.HasSuffix(host, ".") {
// Strip trailing dot from fully qualified domain names.
host = host[:len(host)-1]
}
// Strip trailing dot from fully qualified domain names.
host = strings.TrimSuffix(host, ".")
return host, nil
}

9
pkg/util/util/util.go
View File

@@ -44,7 +44,7 @@ func RandIDWithLen(idLen int) (id string, err error) {
}
func GetAuthKey(token string, timestamp int64) (key string) {
token = token + fmt.Sprintf("%d", timestamp)
token += fmt.Sprintf("%d", timestamp)
md5Ctx := md5.New()
md5Ctx.Write([]byte(token))
data := md5Ctx.Sum(nil)
@@ -70,7 +70,8 @@ func ParseRangeNumbers(rangeStr string) (numbers []int64, err error) {
numArray := strings.Split(numRangeStr, "-")
// length: only 1 or 2 is correct
rangeType := len(numArray)
if rangeType == 1 {
switch rangeType {
case 1:
// single number
singleNum, errRet := strconv.ParseInt(strings.TrimSpace(numArray[0]), 10, 64)
if errRet != nil {
@@ -78,7 +79,7 @@ func ParseRangeNumbers(rangeStr string) (numbers []int64, err error) {
return
}
numbers = append(numbers, singleNum)
} else if rangeType == 2 {
case 2:
// range numbers
min, errRet := strconv.ParseInt(strings.TrimSpace(numArray[0]), 10, 64)
if errRet != nil {
@@ -97,7 +98,7 @@ func ParseRangeNumbers(rangeStr string) (numbers []int64, err error) {
for i := min; i <= max; i++ {
numbers = append(numbers, i)
}
} else {
default:
err = fmt.Errorf("range number is invalid")
return
}

2
pkg/util/version/version.go
View File

@@ -19,7 +19,7 @@ import (
"strings"
)
var version string = "0.44.0"
var version = "0.44.0"
func Full() string {
return version

38
pkg/util/vhost/http.go
View File

@@ -23,27 +23,26 @@ import (
"log"
"net"
"net/http"
"net/http/httputil"
"net/url"
"strings"
"time"
frpIo "github.com/fatedier/golib/io"
"github.com/fatedier/golib/pool"
frpLog "github.com/fatedier/frp/pkg/util/log"
"github.com/fatedier/frp/pkg/util/util"
frpIo "github.com/fatedier/golib/io"
"github.com/fatedier/golib/pool"
)
var (
ErrNoRouteFound = errors.New("no route found")
)
var ErrNoRouteFound = errors.New("no route found")
type HTTPReverseProxyOptions struct {
ResponseHeaderTimeoutS int64
}
type HTTPReverseProxy struct {
proxy *ReverseProxy
proxy *httputil.ReverseProxy
vhostRouter *Routers
responseHeaderTimeout time.Duration
@@ -57,7 +56,7 @@ func NewHTTPReverseProxy(option HTTPReverseProxyOptions, vhostRouter *Routers) *
responseHeaderTimeout: time.Duration(option.ResponseHeaderTimeoutS) * time.Second,
vhostRouter: vhostRouter,
}
proxy := &ReverseProxy{
proxy := &httputil.ReverseProxy{
// Modify incoming requests by route policies.
Director: func(req *http.Request) {
req.URL.Scheme = "http"
@@ -81,7 +80,6 @@ func NewHTTPReverseProxy(option HTTPReverseProxyOptions, vhostRouter *Routers) *
} else {
req.URL.Host = req.Host
}
},
// Create a connection to one proxy routed by route policy.
Transport: &http.Transport{
@@ -114,7 +112,7 @@ func NewHTTPReverseProxy(option HTTPReverseProxyOptions, vhostRouter *Routers) *
ErrorHandler: func(rw http.ResponseWriter, req *http.Request, err error) {
frpLog.Warn("do http proxy request [host: %s] error: %v", req.Host, err)
rw.WriteHeader(http.StatusNotFound)
rw.Write(getNotFoundPageContent())
_, _ = rw.Write(getNotFoundPageContent())
},
}
rp.proxy = proxy
@@ -257,10 +255,28 @@ func (rp *HTTPReverseProxy) connectHandler(rw http.ResponseWriter, req *http.Req
client.Close()
return
}
req.Write(remote)
_ = req.Write(remote)
go frpIo.Join(remote, client)
}
func parseBasicAuth(auth string) (username, password string, ok bool) {
const prefix = "Basic "
// Case insensitive prefix match. See Issue 22736.
if len(auth) < len(prefix) || !strings.EqualFold(auth[:len(prefix)], prefix) {
return
}
c, err := base64.StdEncoding.DecodeString(auth[len(prefix):])
if err != nil {
return
}
cs := string(c)
s := strings.IndexByte(cs, ':')
if s < 0 {
return
}
return cs[:s], cs[s+1:], true
}
func (rp *HTTPReverseProxy) injectRequestInfoToCtx(req *http.Request) *http.Request {
newctx := req.Context()
newctx = context.WithValue(newctx, RouteInfoURL, req.URL.Path)

4
pkg/util/vhost/resource.go
View File

@@ -24,9 +24,7 @@ import (
"github.com/fatedier/frp/pkg/util/version"
)
var (
NotFoundPagePath = ""
)
var NotFoundPagePath = ""
const (
NotFound = `<!DOCTYPE html>

636
pkg/util/vhost/reverseproxy.go
View File

@@ -1,636 +0,0 @@
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// HTTP reverse proxy handler
package vhost
import (
"context"
"encoding/base64"
"fmt"
"io"
"log"
"net"
"net/http"
"net/textproto"
"net/url"
"strings"
"sync"
"time"
"golang.org/x/net/http/httpguts"
)
// ReverseProxy is an HTTP Handler that takes an incoming request and
// sends it to another server, proxying the response back to the
// client.
//
// ReverseProxy by default sets the client IP as the value of the
// X-Forwarded-For header.
//
// If an X-Forwarded-For header already exists, the client IP is
// appended to the existing values. As a special case, if the header
// exists in the Request.Header map but has a nil value (such as when
// set by the Director func), the X-Forwarded-For header is
// not modified.
//
// To prevent IP spoofing, be sure to delete any pre-existing
// X-Forwarded-For header coming from the client or
// an untrusted proxy.
type ReverseProxy struct {
// Director must be a function which modifies
// the request into a new request to be sent
// using Transport. Its response is then copied
// back to the original client unmodified.
// Director must not access the provided Request
// after returning.
Director func(*http.Request)
// The transport used to perform proxy requests.
// If nil, http.DefaultTransport is used.
Transport http.RoundTripper
// FlushInterval specifies the flush interval
// to flush to the client while copying the
// response body.
// If zero, no periodic flushing is done.
// A negative value means to flush immediately
// after each write to the client.
// The FlushInterval is ignored when ReverseProxy
// recognizes a response as a streaming response, or
// if its ContentLength is -1; for such responses, writes
// are flushed to the client immediately.
FlushInterval time.Duration
// ErrorLog specifies an optional logger for errors
// that occur when attempting to proxy the request.
// If nil, logging is done via the log package's standard logger.
ErrorLog *log.Logger
// BufferPool optionally specifies a buffer pool to
// get byte slices for use by io.CopyBuffer when
// copying HTTP response bodies.
BufferPool BufferPool
// ModifyResponse is an optional function that modifies the
// Response from the backend. It is called if the backend
// returns a response at all, with any HTTP status code.
// If the backend is unreachable, the optional ErrorHandler is
// called without any call to ModifyResponse.
//
// If ModifyResponse returns an error, ErrorHandler is called
// with its error value. If ErrorHandler is nil, its default
// implementation is used.
ModifyResponse func(*http.Response) error
// ErrorHandler is an optional function that handles errors
// reaching the backend or errors from ModifyResponse.
//
// If nil, the default is to log the provided error and return
// a 502 Status Bad Gateway response.
ErrorHandler func(http.ResponseWriter, *http.Request, error)
}
// A BufferPool is an interface for getting and returning temporary
// byte slices for use by io.CopyBuffer.
type BufferPool interface {
Get() []byte
Put([]byte)
}
func singleJoiningSlash(a, b string) string {
aslash := strings.HasSuffix(a, "/")
bslash := strings.HasPrefix(b, "/")
switch {
case aslash && bslash:
return a + b[1:]
case !aslash && !bslash:
return a + "/" + b
}
return a + b
}
func joinURLPath(a, b *url.URL) (path, rawpath string) {
if a.RawPath == "" && b.RawPath == "" {
return singleJoiningSlash(a.Path, b.Path), ""
}
// Same as singleJoiningSlash, but uses EscapedPath to determine
// whether a slash should be added
apath := a.EscapedPath()
bpath := b.EscapedPath()
aslash := strings.HasSuffix(apath, "/")
bslash := strings.HasPrefix(bpath, "/")
switch {
case aslash && bslash:
return a.Path + b.Path[1:], apath + bpath[1:]
case !aslash && !bslash:
return a.Path + "/" + b.Path, apath + "/" + bpath
}
return a.Path + b.Path, apath + bpath
}
// NewSingleHostReverseProxy returns a new ReverseProxy that routes
// URLs to the scheme, host, and base path provided in target. If the
// target's path is "/base" and the incoming request was for "/dir",
// the target request will be for /base/dir.
// NewSingleHostReverseProxy does not rewrite the Host header.
// To rewrite Host headers, use ReverseProxy directly with a custom
// Director policy.
func NewSingleHostReverseProxy(target *url.URL) *ReverseProxy {
targetQuery := target.RawQuery
director := func(req *http.Request) {
req.URL.Scheme = target.Scheme
req.URL.Host = target.Host
req.URL.Path, req.URL.RawPath = joinURLPath(target, req.URL)
if targetQuery == "" || req.URL.RawQuery == "" {
req.URL.RawQuery = targetQuery + req.URL.RawQuery
} else {
req.URL.RawQuery = targetQuery + "&" + req.URL.RawQuery
}
if _, ok := req.Header["User-Agent"]; !ok {
// explicitly disable User-Agent so it's not set to default value
req.Header.Set("User-Agent", "")
}
}
return &ReverseProxy{Director: director}
}
func copyHeader(dst, src http.Header) {
for k, vv := range src {
for _, v := range vv {
dst.Add(k, v)
}
}
}
// Hop-by-hop headers. These are removed when sent to the backend.
// As of RFC 7230, hop-by-hop headers are required to appear in the
// Connection header field. These are the headers defined by the
// obsoleted RFC 2616 (section 13.5.1) and are used for backward
// compatibility.
var hopHeaders = []string{
"Connection",
"Proxy-Connection", // non-standard but still sent by libcurl and rejected by e.g. google
"Keep-Alive",
"Proxy-Authenticate",
"Proxy-Authorization",
"Te", // canonicalized version of "TE"
"Trailer", // not Trailers per URL above; https://www.rfc-editor.org/errata_search.php?eid=4522
"Transfer-Encoding",
"Upgrade",
}
func (p *ReverseProxy) defaultErrorHandler(rw http.ResponseWriter, req *http.Request, err error) {
p.logf("http: proxy error: %v", err)
rw.WriteHeader(http.StatusBadGateway)
}
func (p *ReverseProxy) getErrorHandler() func(http.ResponseWriter, *http.Request, error) {
if p.ErrorHandler != nil {
return p.ErrorHandler
}
return p.defaultErrorHandler
}
// modifyResponse conditionally runs the optional ModifyResponse hook
// and reports whether the request should proceed.
func (p *ReverseProxy) modifyResponse(rw http.ResponseWriter, res *http.Response, req *http.Request) bool {
if p.ModifyResponse == nil {
return true
}
if err := p.ModifyResponse(res); err != nil {
res.Body.Close()
p.getErrorHandler()(rw, req, err)
return false
}
return true
}
func parseBasicAuth(auth string) (username, password string, ok bool) {
const prefix = "Basic "
// Case insensitive prefix match. See Issue 22736.
if len(auth) < len(prefix) || !strings.EqualFold(auth[:len(prefix)], prefix) {
return
}
c, err := base64.StdEncoding.DecodeString(auth[len(prefix):])
if err != nil {
return
}
cs := string(c)
s := strings.IndexByte(cs, ':')
if s < 0 {
return
}
return cs[:s], cs[s+1:], true
}
func (p *ReverseProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
transport := p.Transport
if transport == nil {
transport = http.DefaultTransport
}
ctx := req.Context()
if cn, ok := rw.(http.CloseNotifier); ok {
var cancel context.CancelFunc
ctx, cancel = context.WithCancel(ctx)
defer cancel()
notifyChan := cn.CloseNotify()
go func() {
select {
case <-notifyChan:
cancel()
case <-ctx.Done():
}
}()
}
outreq := req.Clone(ctx)
if req.ContentLength == 0 {
outreq.Body = nil // Issue 16036: nil Body for http.Transport retries
}
if outreq.Header == nil {
outreq.Header = make(http.Header) // Issue 33142: historical behavior was to always allocate
}
p.Director(outreq)
outreq.Close = false
reqUpType := upgradeType(outreq.Header)
removeConnectionHeaders(outreq.Header)
// Remove hop-by-hop headers to the backend. Especially
// important is "Connection" because we want a persistent
// connection, regardless of what the client sent to us.
for _, h := range hopHeaders {
hv := outreq.Header.Get(h)
if hv == "" {
continue
}
if h == "Te" && hv == "trailers" {
// Issue 21096: tell backend applications that
// care about trailer support that we support
// trailers. (We do, but we don't go out of
// our way to advertise that unless the
// incoming client request thought it was
// worth mentioning)
continue
}
outreq.Header.Del(h)
}
// After stripping all the hop-by-hop connection headers above, add back any
// necessary for protocol upgrades, such as for websockets.
if reqUpType != "" {
outreq.Header.Set("Connection", "Upgrade")
outreq.Header.Set("Upgrade", reqUpType)
}
if clientIP, _, err := net.SplitHostPort(req.RemoteAddr); err == nil {
// If we aren't the first proxy retain prior
// X-Forwarded-For information as a comma+space
// separated list and fold multiple headers into one.
prior, ok := outreq.Header["X-Forwarded-For"]
omit := ok && prior == nil // Issue 38079: nil now means don't populate the header
if len(prior) > 0 {
clientIP = strings.Join(prior, ", ") + ", " + clientIP
}
if !omit {
outreq.Header.Set("X-Forwarded-For", clientIP)
}
}
res, err := transport.RoundTrip(outreq)
if err != nil {
p.getErrorHandler()(rw, outreq, err)
return
}
// Deal with 101 Switching Protocols responses: (WebSocket, h2c, etc)
if res.StatusCode == http.StatusSwitchingProtocols {
if !p.modifyResponse(rw, res, outreq) {
return
}
p.handleUpgradeResponse(rw, outreq, res)
return
}
removeConnectionHeaders(res.Header)
for _, h := range hopHeaders {
res.Header.Del(h)
}
if !p.modifyResponse(rw, res, outreq) {
return
}
copyHeader(rw.Header(), res.Header)
// The "Trailer" header isn't included in the Transport's response,
// at least for *http.Transport. Build it up from Trailer.
announcedTrailers := len(res.Trailer)
if announcedTrailers > 0 {
trailerKeys := make([]string, 0, len(res.Trailer))
for k := range res.Trailer {
trailerKeys = append(trailerKeys, k)
}
rw.Header().Add("Trailer", strings.Join(trailerKeys, ", "))
}
rw.WriteHeader(res.StatusCode)
err = p.copyResponse(rw, res.Body, p.flushInterval(res))
if err != nil {
defer res.Body.Close()
// Since we're streaming the response, if we run into an error all we can do
// is abort the request. Issue 23643: ReverseProxy should use ErrAbortHandler
// on read error while copying body.
if !shouldPanicOnCopyError(req) {
p.logf("suppressing panic for copyResponse error in test; copy error: %v", err)
return
}
panic(http.ErrAbortHandler)
}
res.Body.Close() // close now, instead of defer, to populate res.Trailer
if len(res.Trailer) > 0 {
// Force chunking if we saw a response trailer.
// This prevents net/http from calculating the length for short
// bodies and adding a Content-Length.
if fl, ok := rw.(http.Flusher); ok {
fl.Flush()
}
}
if len(res.Trailer) == announcedTrailers {
copyHeader(rw.Header(), res.Trailer)
return
}
for k, vv := range res.Trailer {
k = http.TrailerPrefix + k
for _, v := range vv {
rw.Header().Add(k, v)
}
}
}
var inOurTests bool // whether we're in our own tests
// shouldPanicOnCopyError reports whether the reverse proxy should
// panic with http.ErrAbortHandler. This is the right thing to do by
// default, but Go 1.10 and earlier did not, so existing unit tests
// weren't expecting panics. Only panic in our own tests, or when
// running under the HTTP server.
func shouldPanicOnCopyError(req *http.Request) bool {
if inOurTests {
// Our tests know to handle this panic.
return true
}
if req.Context().Value(http.ServerContextKey) != nil {
// We seem to be running under an HTTP server, so
// it'll recover the panic.
return true
}
// Otherwise act like Go 1.10 and earlier to not break
// existing tests.
return false
}
// removeConnectionHeaders removes hop-by-hop headers listed in the "Connection" header of h.
// See RFC 7230, section 6.1
func removeConnectionHeaders(h http.Header) {
for _, f := range h["Connection"] {
for _, sf := range strings.Split(f, ",") {
if sf = textproto.TrimString(sf); sf != "" {
h.Del(sf)
}
}
}
}
// flushInterval returns the p.FlushInterval value, conditionally
// overriding its value for a specific request/response.
func (p *ReverseProxy) flushInterval(res *http.Response) time.Duration {
resCT := res.Header.Get("Content-Type")
// For Server-Sent Events responses, flush immediately.
// The MIME type is defined in https://www.w3.org/TR/eventsource/#text-event-stream
if resCT == "text/event-stream" {
return -1 // negative means immediately
}
// We might have the case of streaming for which Content-Length might be unset.
if res.ContentLength == -1 {
return -1
}
return p.FlushInterval
}
func (p *ReverseProxy) copyResponse(dst io.Writer, src io.Reader, flushInterval time.Duration) error {
if flushInterval != 0 {
if wf, ok := dst.(writeFlusher); ok {
mlw := &maxLatencyWriter{
dst: wf,
latency: flushInterval,
}
defer mlw.stop()
// set up initial timer so headers get flushed even if body writes are delayed
mlw.flushPending = true
mlw.t = time.AfterFunc(flushInterval, mlw.delayedFlush)
dst = mlw
}
}
var buf []byte
if p.BufferPool != nil {
buf = p.BufferPool.Get()
defer p.BufferPool.Put(buf)
}
_, err := p.copyBuffer(dst, src, buf)
return err
}
// copyBuffer returns any write errors or non-EOF read errors, and the amount
// of bytes written.
func (p *ReverseProxy) copyBuffer(dst io.Writer, src io.Reader, buf []byte) (int64, error) {
if len(buf) == 0 {
buf = make([]byte, 32*1024)
}
var written int64
for {
nr, rerr := src.Read(buf)
if rerr != nil && rerr != io.EOF && rerr != context.Canceled {
p.logf("httputil: ReverseProxy read error during body copy: %v", rerr)
}
if nr > 0 {
nw, werr := dst.Write(buf[:nr])
if nw > 0 {
written += int64(nw)
}
if werr != nil {
return written, werr
}
if nr != nw {
return written, io.ErrShortWrite
}
}
if rerr != nil {
if rerr == io.EOF {
rerr = nil
}
return written, rerr
}
}
}
func (p *ReverseProxy) logf(format string, args ...interface{}) {
if p.ErrorLog != nil {
p.ErrorLog.Printf(format, args...)
} else {
log.Printf(format, args...)
}
}
type writeFlusher interface {
io.Writer
http.Flusher
}
type maxLatencyWriter struct {
dst writeFlusher
latency time.Duration // non-zero; negative means to flush immediately
mu sync.Mutex // protects t, flushPending, and dst.Flush
t *time.Timer
flushPending bool
}
func (m *maxLatencyWriter) Write(p []byte) (n int, err error) {
m.mu.Lock()
defer m.mu.Unlock()
n, err = m.dst.Write(p)
if m.latency < 0 {
m.dst.Flush()
return
}
if m.flushPending {
return
}
if m.t == nil {
m.t = time.AfterFunc(m.latency, m.delayedFlush)
} else {
m.t.Reset(m.latency)
}
m.flushPending = true
return
}
func (m *maxLatencyWriter) delayedFlush() {
m.mu.Lock()
defer m.mu.Unlock()
if !m.flushPending { // if stop was called but AfterFunc already started this goroutine
return
}
m.dst.Flush()
m.flushPending = false
}
func (m *maxLatencyWriter) stop() {
m.mu.Lock()
defer m.mu.Unlock()
m.flushPending = false
if m.t != nil {
m.t.Stop()
}
}
func upgradeType(h http.Header) string {
if !httpguts.HeaderValuesContainsToken(h["Connection"], "Upgrade") {
return ""
}
return strings.ToLower(h.Get("Upgrade"))
}
func (p *ReverseProxy) handleUpgradeResponse(rw http.ResponseWriter, req *http.Request, res *http.Response) {
reqUpType := upgradeType(req.Header)
resUpType := upgradeType(res.Header)
if reqUpType != resUpType {
p.getErrorHandler()(rw, req, fmt.Errorf("backend tried to switch protocol %q when %q was requested", resUpType, reqUpType))
return
}
hj, ok := rw.(http.Hijacker)
if !ok {
p.getErrorHandler()(rw, req, fmt.Errorf("can't switch protocols using non-Hijacker ResponseWriter type %T", rw))
return
}
backConn, ok := res.Body.(io.ReadWriteCloser)
if !ok {
p.getErrorHandler()(rw, req, fmt.Errorf("internal error: 101 switching protocols response with non-writable body"))
return
}
backConnCloseCh := make(chan bool)
go func() {
// Ensure that the cancelation of a request closes the backend.
// See issue https://golang.org/issue/35559.
select {
case <-req.Context().Done():
case <-backConnCloseCh:
}
backConn.Close()
}()
defer close(backConnCloseCh)
conn, brw, err := hj.Hijack()
if err != nil {
p.getErrorHandler()(rw, req, fmt.Errorf("Hijack failed on protocol switch: %v", err))
return
}
defer conn.Close()
copyHeader(rw.Header(), res.Header)
res.Header = rw.Header()
res.Body = nil // so res.Write only writes the headers; we have res.Body in backConn above
if err := res.Write(brw); err != nil {
p.getErrorHandler()(rw, req, fmt.Errorf("response write: %v", err))
return
}
if err := brw.Flush(); err != nil {
p.getErrorHandler()(rw, req, fmt.Errorf("response flush: %v", err))
return
}
errc := make(chan error, 1)
spc := switchProtocolCopier{user: conn, backend: backConn}
go spc.copyToBackend(errc)
go spc.copyFromBackend(errc)
<-errc
return
}
// switchProtocolCopier exists so goroutines proxying data back and
// forth have nice names in stacks.
type switchProtocolCopier struct {
user, backend io.ReadWriter
}
func (c switchProtocolCopier) copyFromBackend(errc chan<- error) {
_, err := io.Copy(c.user, c.backend)
errc <- err
}
func (c switchProtocolCopier) copyToBackend(errc chan<- error) {
_, err := io.Copy(c.backend, c.user)
errc <- err
}

6
pkg/util/vhost/router.go
View File

@@ -7,9 +7,7 @@ import (
"sync"
)
var (
ErrRouterConfigConflict = errors.New("router config conflict")
)
var ErrRouterConfigConflict = errors.New("router config conflict")
type routerByHTTPUser map[string][]*Router
@@ -133,9 +131,11 @@ type ByLocation []*Router
func (a ByLocation) Len() int {
return len(a)
}
func (a ByLocation) Swap(i, j int) {
a[i], a[j] = a[j], a[i]
}
func (a ByLocation) Less(i, j int) bool {
return strings.Compare(a[i].location, a[j].location) < 0
}

42
pkg/util/vhost/vhost.go
View File

@@ -19,11 +19,11 @@ import (
"strings"
"time"
"github.com/fatedier/golib/errors"
"github.com/fatedier/frp/pkg/util/log"
frpNet "github.com/fatedier/frp/pkg/util/net"
"github.com/fatedier/frp/pkg/util/xlog"
"github.com/fatedier/golib/errors"
)
type RouteInfo string
@@ -36,10 +36,12 @@ const (
RouteInfoURLHost RouteInfo = "urlHost"
)
type muxFunc func(net.Conn) (net.Conn, map[string]string, error)
type httpAuthFunc func(net.Conn, string, string, string) (bool, error)
type hostRewriteFunc func(net.Conn, string) (net.Conn, error)
type successFunc func(net.Conn, map[string]string) error
type (
muxFunc func(net.Conn) (net.Conn, map[string]string, error)
httpAuthFunc func(net.Conn, string, string, string) (bool, error)
hostRewriteFunc func(net.Conn, string) (net.Conn, error)
successFunc func(net.Conn, map[string]string) error
)
// Muxer is only used for https and tcpmux proxy.
type Muxer struct {
@@ -60,7 +62,6 @@ func NewMuxer(
rewriteFunc hostRewriteFunc,
timeout time.Duration,
) (mux *Muxer, err error) {
mux = &Muxer{
listener: listener,
timeout: timeout,
@@ -111,9 +112,8 @@ func (v *Muxer) Listen(ctx context.Context, cfg *RouteConfig) (l *Listener, err
}
func (v *Muxer) getListener(name, path, httpUser string) (*Listener, bool) {
findRouter := func(inName, inPath, inHTTPUser string) (*Listener, bool) {
vr, ok := v.registryRouter.Get(inName, inPath, httpUser)
vr, ok := v.registryRouter.Get(inName, inPath, inHTTPUser)
if ok {
return vr.payload.(*Listener), true
}
@@ -167,14 +167,14 @@ func (v *Muxer) run() {
func (v *Muxer) handle(c net.Conn) {
if err := c.SetDeadline(time.Now().Add(v.timeout)); err != nil {
c.Close()
_ = c.Close()
return
}
sConn, reqInfoMap, err := v.vhostFunc(c)
if err != nil {
log.Debug("get hostname from http/https request error: %v", err)
c.Close()
_ = c.Close()
return
}
@@ -184,9 +184,12 @@ func (v *Muxer) handle(c net.Conn) {
l, ok := v.getListener(name, path, httpUser)
if !ok {
res := notFoundResponse()
res.Write(c)
if res.Body != nil {
defer res.Body.Close()
}
_ = res.Write(c)
log.Debug("http request for host [%s] path [%s] httpUser [%s] not found", name, path, httpUser)
c.Close()
_ = c.Close()
return
}
@@ -194,7 +197,7 @@ func (v *Muxer) handle(c net.Conn) {
if v.successFunc != nil {
if err := v.successFunc(c, reqInfoMap); err != nil {
xl.Info("success func failure on vhost connection: %v", err)
c.Close()
_ = c.Close()
return
}
}
@@ -203,17 +206,20 @@ func (v *Muxer) handle(c net.Conn) {
// then verify user access
if l.mux.authFunc != nil && l.userName != "" && l.passWord != "" {
bAccess, err := l.mux.authFunc(c, l.userName, l.passWord, reqInfoMap["Authorization"])
if bAccess == false || err != nil {
if !bAccess || err != nil {
xl.Debug("check http Authorization failed")
res := noAuthResponse()
res.Write(c)
c.Close()
if res.Body != nil {
defer res.Body.Close()
}
_ = res.Write(c)
_ = c.Close()
return
}
}
if err = sConn.SetDeadline(time.Time{}); err != nil {
c.Close()
_ = c.Close()
return
}
c = sConn