--- /dev/null
+
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
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+ APPENDIX: How to apply the Apache License to your work.
+
+ To apply the Apache License to your work, attach the following
+ boilerplate notice, with the fields enclosed by brackets "[]"
+ replaced with your own identifying information. (Don't include
+ the brackets!) The text should be enclosed in the appropriate
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+ 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.
--- /dev/null
+# Copyright 2012 Google Inc. All Rights Reserved.
+#
+# 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.
+
+BUILD_LABEL=$(shell date +"%s")
+TAR_OUT=$(shell go env GOOS)_$(shell go env GOARCH).tar.gz
+
+all: git-remote-persistent-https git-remote-persistent-https--proxy \
+ git-remote-persistent-http
+
+git-remote-persistent-https--proxy: git-remote-persistent-https
+ ln -f -s git-remote-persistent-https git-remote-persistent-https--proxy
+
+git-remote-persistent-http: git-remote-persistent-https
+ ln -f -s git-remote-persistent-https git-remote-persistent-http
+
+git-remote-persistent-https:
+ go build -o git-remote-persistent-https \
+ -ldflags "-X main._BUILD_EMBED_LABEL $(BUILD_LABEL)"
+
+clean:
+ rm -f git-remote-persistent-http* *.tar.gz
+
+tar: clean all
+ @chmod 555 git-remote-persistent-https
+ @tar -czf $(TAR_OUT) git-remote-persistent-http* README LICENSE
+ @echo
+ @echo "Created $(TAR_OUT)"
--- /dev/null
+git-remote-persistent-https
+
+The git-remote-persistent-https binary speeds up SSL operations
+by running a daemon job (git-remote-persistent-https--proxy) that
+keeps a connection open to a server.
+
+
+PRE-BUILT BINARIES
+
+Darwin amd64:
+https://commondatastorage.googleapis.com/git-remote-persistent-https/darwin_amd64.tar.gz
+
+Linux amd64:
+https://commondatastorage.googleapis.com/git-remote-persistent-https/linux_amd64.tar.gz
+
+
+INSTALLING
+
+Move all of the git-remote-persistent-http* binaries to a directory
+in PATH.
+
+
+USAGE
+
+HTTPS requests can be delegated to the proxy by using the
+"persistent-https" scheme, e.g.
+
+git clone persistent-https://kernel.googlesource.com/pub/scm/git/git
+
+Likewise, .gitconfig can be updated as follows to rewrite https urls
+to use persistent-https:
+
+[url "persistent-https"]
+ insteadof = https
+[url "persistent-http"]
+ insteadof = http
+
+
+#####################################################################
+# BUILDING FROM SOURCE
+#####################################################################
+
+LOCATION
+
+The source is available in the contrib/persistent-https directory of
+the Git source repository. The Git source repository is available at
+git://git.kernel.org/pub/scm/git/git.git/
+https://kernel.googlesource.com/pub/scm/git/git
+
+
+PREREQUISITES
+
+The code is written in Go (http://golang.org/) and the Go compiler is
+required. Currently, the compiler must be built and installed from tip
+of source, in order to include a fix in the reverse http proxy:
+http://code.google.com/p/go/source/detail?r=a615b796570a2cd8591884767a7d67ede74f6648
+
+
+BUILDING
+
+Run "make" to build the binaries. See the section on
+INSTALLING above.
--- /dev/null
+// Copyright 2012 Google Inc. All Rights Reserved.
+//
+// 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 main
+
+import (
+ "bufio"
+ "errors"
+ "fmt"
+ "net"
+ "net/url"
+ "os"
+ "os/exec"
+ "strings"
+ "syscall"
+ "time"
+)
+
+type Client struct {
+ ProxyBin string
+ Args []string
+
+ insecure bool
+}
+
+func (c *Client) Run() error {
+ if err := c.resolveArgs(); err != nil {
+ return fmt.Errorf("resolveArgs() got error: %v", err)
+ }
+
+ // Connect to the proxy.
+ uconn, hconn, addr, err := c.connect()
+ if err != nil {
+ return fmt.Errorf("connect() got error: %v", err)
+ }
+ // Keep the unix socket connection open for the duration of the request.
+ defer uconn.Close()
+ // Keep a connection to the HTTP server open, so no other user can
+ // bind on the same address so long as the process is running.
+ defer hconn.Close()
+
+ // Start the git-remote-http subprocess.
+ cargs := []string{"-c", fmt.Sprintf("http.proxy=%v", addr), "remote-http"}
+ cargs = append(cargs, c.Args...)
+ cmd := exec.Command("git", cargs...)
+
+ for _, v := range os.Environ() {
+ if !strings.HasPrefix(v, "GIT_PERSISTENT_HTTPS_SECURE=") {
+ cmd.Env = append(cmd.Env, v)
+ }
+ }
+ // Set the GIT_PERSISTENT_HTTPS_SECURE environment variable when
+ // the proxy is using a SSL connection. This allows credential helpers
+ // to identify secure proxy connections, despite being passed an HTTP
+ // scheme.
+ if !c.insecure {
+ cmd.Env = append(cmd.Env, "GIT_PERSISTENT_HTTPS_SECURE=1")
+ }
+
+ cmd.Stdin = os.Stdin
+ cmd.Stdout = os.Stdout
+ cmd.Stderr = os.Stderr
+ if err := cmd.Run(); err != nil {
+ if eerr, ok := err.(*exec.ExitError); ok {
+ if stat, ok := eerr.ProcessState.Sys().(syscall.WaitStatus); ok && stat.ExitStatus() != 0 {
+ os.Exit(stat.ExitStatus())
+ }
+ }
+ return fmt.Errorf("git-remote-http subprocess got error: %v", err)
+ }
+ return nil
+}
+
+func (c *Client) connect() (uconn net.Conn, hconn net.Conn, addr string, err error) {
+ uconn, err = DefaultSocket.Dial()
+ if err != nil {
+ if e, ok := err.(*net.OpError); ok && (os.IsNotExist(e.Err) || e.Err == syscall.ECONNREFUSED) {
+ if err = c.startProxy(); err == nil {
+ uconn, err = DefaultSocket.Dial()
+ }
+ }
+ if err != nil {
+ return
+ }
+ }
+
+ if addr, err = c.readAddr(uconn); err != nil {
+ return
+ }
+
+ // Open a tcp connection to the proxy.
+ if hconn, err = net.Dial("tcp", addr); err != nil {
+ return
+ }
+
+ // Verify the address hasn't changed ownership.
+ var addr2 string
+ if addr2, err = c.readAddr(uconn); err != nil {
+ return
+ } else if addr != addr2 {
+ err = fmt.Errorf("address changed after connect. got %q, want %q", addr2, addr)
+ return
+ }
+ return
+}
+
+func (c *Client) readAddr(conn net.Conn) (string, error) {
+ conn.SetDeadline(time.Now().Add(5 * time.Second))
+ data := make([]byte, 100)
+ n, err := conn.Read(data)
+ if err != nil {
+ return "", fmt.Errorf("error reading unix socket: %v", err)
+ } else if n == 0 {
+ return "", errors.New("empty data response")
+ }
+ conn.Write([]byte{1}) // Ack
+
+ var addr string
+ if addrs := strings.Split(string(data[:n]), "\n"); len(addrs) != 2 {
+ return "", fmt.Errorf("got %q, wanted 2 addresses", data[:n])
+ } else if c.insecure {
+ addr = addrs[1]
+ } else {
+ addr = addrs[0]
+ }
+ return addr, nil
+}
+
+func (c *Client) startProxy() error {
+ cmd := exec.Command(c.ProxyBin)
+ cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+ stdout, err := cmd.StdoutPipe()
+ if err != nil {
+ return err
+ }
+ defer stdout.Close()
+ if err := cmd.Start(); err != nil {
+ return err
+ }
+ result := make(chan error)
+ go func() {
+ bytes, _, err := bufio.NewReader(stdout).ReadLine()
+ if line := string(bytes); err == nil && line != "OK" {
+ err = fmt.Errorf("proxy returned %q, want \"OK\"", line)
+ }
+ result <- err
+ }()
+ select {
+ case err := <-result:
+ return err
+ case <-time.After(5 * time.Second):
+ return errors.New("timeout waiting for proxy to start")
+ }
+ panic("not reachable")
+}
+
+func (c *Client) resolveArgs() error {
+ if nargs := len(c.Args); nargs == 0 {
+ return errors.New("remote needed")
+ } else if nargs > 2 {
+ return fmt.Errorf("want at most 2 args, got %v", c.Args)
+ }
+
+ // Rewrite the url scheme to be http.
+ idx := len(c.Args) - 1
+ rawurl := c.Args[idx]
+ rurl, err := url.Parse(rawurl)
+ if err != nil {
+ return fmt.Errorf("invalid remote: %v", err)
+ }
+ c.insecure = rurl.Scheme == "persistent-http"
+ rurl.Scheme = "http"
+ c.Args[idx] = rurl.String()
+ if idx != 0 && c.Args[0] == rawurl {
+ c.Args[0] = c.Args[idx]
+ }
+ return nil
+}
--- /dev/null
+// Copyright 2012 Google Inc. All Rights Reserved.
+//
+// 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.
+
+// The git-remote-persistent-https binary speeds up SSL operations by running
+// a daemon job that keeps a connection open to a Git server. This ensures the
+// git-remote-persistent-https--proxy is running and delegating execution
+// to the git-remote-http binary with the http_proxy set to the daemon job.
+// A unix socket is used to authenticate the proxy and discover the
+// HTTP address. Note, both the client and proxy are included in the same
+// binary.
+package main
+
+import (
+ "flag"
+ "fmt"
+ "log"
+ "os"
+ "strings"
+ "time"
+)
+
+var (
+ forceProxy = flag.Bool("proxy", false, "Whether to start the binary in proxy mode")
+ proxyBin = flag.String("proxy_bin", "git-remote-persistent-https--proxy", "Path to the proxy binary")
+ printLabel = flag.Bool("print_label", false, "Prints the build label for the binary")
+
+ // Variable that should be defined through the -X linker flag.
+ _BUILD_EMBED_LABEL string
+)
+
+const (
+ defaultMaxIdleDuration = 24 * time.Hour
+ defaultPollUpdateInterval = 15 * time.Minute
+)
+
+func main() {
+ flag.Parse()
+ if *printLabel {
+ // Short circuit execution to print the build label
+ fmt.Println(buildLabel())
+ return
+ }
+
+ var err error
+ if *forceProxy || strings.HasSuffix(os.Args[0], "--proxy") {
+ log.SetPrefix("git-remote-persistent-https--proxy: ")
+ proxy := &Proxy{
+ BuildLabel: buildLabel(),
+ MaxIdleDuration: defaultMaxIdleDuration,
+ PollUpdateInterval: defaultPollUpdateInterval,
+ }
+ err = proxy.Run()
+ } else {
+ log.SetPrefix("git-remote-persistent-https: ")
+ client := &Client{
+ ProxyBin: *proxyBin,
+ Args: flag.Args(),
+ }
+ err = client.Run()
+ }
+ if err != nil {
+ log.Fatalln(err)
+ }
+}
+
+func buildLabel() string {
+ if _BUILD_EMBED_LABEL == "" {
+ log.Println(`unlabeled build; build with "make" to label`)
+ }
+ return _BUILD_EMBED_LABEL
+}
--- /dev/null
+// Copyright 2012 Google Inc. All Rights Reserved.
+//
+// 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 main
+
+import (
+ "fmt"
+ "log"
+ "net"
+ "net/http"
+ "net/http/httputil"
+ "os"
+ "os/exec"
+ "os/signal"
+ "sync"
+ "syscall"
+ "time"
+)
+
+type Proxy struct {
+ BuildLabel string
+ MaxIdleDuration time.Duration
+ PollUpdateInterval time.Duration
+
+ ul net.Listener
+ httpAddr string
+ httpsAddr string
+}
+
+func (p *Proxy) Run() error {
+ hl, err := net.Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ return fmt.Errorf("http listen failed: %v", err)
+ }
+ defer hl.Close()
+
+ hsl, err := net.Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ return fmt.Errorf("https listen failed: %v", err)
+ }
+ defer hsl.Close()
+
+ p.ul, err = DefaultSocket.Listen()
+ if err != nil {
+ c, derr := DefaultSocket.Dial()
+ if derr == nil {
+ c.Close()
+ fmt.Println("OK\nA proxy is already running... exiting")
+ return nil
+ } else if e, ok := derr.(*net.OpError); ok && e.Err == syscall.ECONNREFUSED {
+ // Nothing is listening on the socket, unlink it and try again.
+ syscall.Unlink(DefaultSocket.Path())
+ p.ul, err = DefaultSocket.Listen()
+ }
+ if err != nil {
+ return fmt.Errorf("unix listen failed on %v: %v", DefaultSocket.Path(), err)
+ }
+ }
+ defer p.ul.Close()
+ go p.closeOnSignal()
+ go p.closeOnUpdate()
+
+ p.httpAddr = hl.Addr().String()
+ p.httpsAddr = hsl.Addr().String()
+ fmt.Printf("OK\nListening on unix socket=%v http=%v https=%v\n",
+ p.ul.Addr(), p.httpAddr, p.httpsAddr)
+
+ result := make(chan error, 2)
+ go p.serveUnix(result)
+ go func() {
+ result <- http.Serve(hl, &httputil.ReverseProxy{
+ FlushInterval: 500 * time.Millisecond,
+ Director: func(r *http.Request) {},
+ })
+ }()
+ go func() {
+ result <- http.Serve(hsl, &httputil.ReverseProxy{
+ FlushInterval: 500 * time.Millisecond,
+ Director: func(r *http.Request) {
+ r.URL.Scheme = "https"
+ },
+ })
+ }()
+ return <-result
+}
+
+type socketContext struct {
+ sync.WaitGroup
+ mutex sync.Mutex
+ last time.Time
+}
+
+func (sc *socketContext) Done() {
+ sc.mutex.Lock()
+ defer sc.mutex.Unlock()
+ sc.last = time.Now()
+ sc.WaitGroup.Done()
+}
+
+func (p *Proxy) serveUnix(result chan<- error) {
+ sockCtx := &socketContext{}
+ go p.closeOnIdle(sockCtx)
+
+ var err error
+ for {
+ var uconn net.Conn
+ uconn, err = p.ul.Accept()
+ if err != nil {
+ err = fmt.Errorf("accept failed: %v", err)
+ break
+ }
+ sockCtx.Add(1)
+ go p.handleUnixConn(sockCtx, uconn)
+ }
+ sockCtx.Wait()
+ result <- err
+}
+
+func (p *Proxy) handleUnixConn(sockCtx *socketContext, uconn net.Conn) {
+ defer sockCtx.Done()
+ defer uconn.Close()
+ data := []byte(fmt.Sprintf("%v\n%v", p.httpsAddr, p.httpAddr))
+ uconn.SetDeadline(time.Now().Add(5 * time.Second))
+ for i := 0; i < 2; i++ {
+ if n, err := uconn.Write(data); err != nil {
+ log.Printf("error sending http addresses: %+v\n", err)
+ return
+ } else if n != len(data) {
+ log.Printf("sent %d data bytes, wanted %d\n", n, len(data))
+ return
+ }
+ if _, err := uconn.Read([]byte{0, 0, 0, 0}); err != nil {
+ log.Printf("error waiting for Ack: %+v\n", err)
+ return
+ }
+ }
+ // Wait without a deadline for the client to finish via EOF
+ uconn.SetDeadline(time.Time{})
+ uconn.Read([]byte{0, 0, 0, 0})
+}
+
+func (p *Proxy) closeOnIdle(sockCtx *socketContext) {
+ for d := p.MaxIdleDuration; d > 0; {
+ time.Sleep(d)
+ sockCtx.Wait()
+ sockCtx.mutex.Lock()
+ if d = sockCtx.last.Add(p.MaxIdleDuration).Sub(time.Now()); d <= 0 {
+ log.Println("graceful shutdown from idle timeout")
+ p.ul.Close()
+ }
+ sockCtx.mutex.Unlock()
+ }
+}
+
+func (p *Proxy) closeOnUpdate() {
+ for {
+ time.Sleep(p.PollUpdateInterval)
+ if out, err := exec.Command(os.Args[0], "--print_label").Output(); err != nil {
+ log.Printf("error polling for updated binary: %v\n", err)
+ } else if s := string(out[:len(out)-1]); p.BuildLabel != s {
+ log.Printf("graceful shutdown from updated binary: %q --> %q\n", p.BuildLabel, s)
+ p.ul.Close()
+ break
+ }
+ }
+}
+
+func (p *Proxy) closeOnSignal() {
+ ch := make(chan os.Signal, 10)
+ signal.Notify(ch, os.Interrupt, os.Kill, os.Signal(syscall.SIGTERM), os.Signal(syscall.SIGHUP))
+ sig := <-ch
+ p.ul.Close()
+ switch sig {
+ case os.Signal(syscall.SIGHUP):
+ log.Printf("graceful shutdown from signal: %v\n", sig)
+ default:
+ log.Fatalf("exiting from signal: %v\n", sig)
+ }
+}
--- /dev/null
+// Copyright 2012 Google Inc. All Rights Reserved.
+//
+// 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 main
+
+import (
+ "fmt"
+ "log"
+ "net"
+ "os"
+ "path/filepath"
+ "syscall"
+)
+
+// A Socket is a wrapper around a Unix socket that verifies directory
+// permissions.
+type Socket struct {
+ Dir string
+}
+
+func defaultDir() string {
+ sockPath := ".git-credential-cache"
+ if home := os.Getenv("HOME"); home != "" {
+ return filepath.Join(home, sockPath)
+ }
+ log.Printf("socket: cannot find HOME path. using relative directory %q for socket", sockPath)
+ return sockPath
+}
+
+// DefaultSocket is a Socket in the $HOME/.git-credential-cache directory.
+var DefaultSocket = Socket{Dir: defaultDir()}
+
+// Listen announces the local network address of the unix socket. The
+// permissions on the socket directory are verified before attempting
+// the actual listen.
+func (s Socket) Listen() (net.Listener, error) {
+ network, addr := "unix", s.Path()
+ if err := s.mkdir(); err != nil {
+ return nil, &net.OpError{Op: "listen", Net: network, Addr: &net.UnixAddr{Name: addr, Net: network}, Err: err}
+ }
+ return net.Listen(network, addr)
+}
+
+// Dial connects to the unix socket. The permissions on the socket directory
+// are verified before attempting the actual dial.
+func (s Socket) Dial() (net.Conn, error) {
+ network, addr := "unix", s.Path()
+ if err := s.checkPermissions(); err != nil {
+ return nil, &net.OpError{Op: "dial", Net: network, Addr: &net.UnixAddr{Name: addr, Net: network}, Err: err}
+ }
+ return net.Dial(network, addr)
+}
+
+// Path returns the fully specified file name of the unix socket.
+func (s Socket) Path() string {
+ return filepath.Join(s.Dir, "persistent-https-proxy-socket")
+}
+
+func (s Socket) mkdir() error {
+ if err := s.checkPermissions(); err == nil {
+ return nil
+ } else if !os.IsNotExist(err) {
+ return err
+ }
+ if err := os.MkdirAll(s.Dir, 0700); err != nil {
+ return err
+ }
+ return s.checkPermissions()
+}
+
+func (s Socket) checkPermissions() error {
+ fi, err := os.Stat(s.Dir)
+ if err != nil {
+ return err
+ }
+ if !fi.IsDir() {
+ return fmt.Errorf("socket: got file, want directory for %q", s.Dir)
+ }
+ if fi.Mode().Perm() != 0700 {
+ return fmt.Errorf("socket: got perm %o, want 700 for %q", fi.Mode().Perm(), s.Dir)
+ }
+ if st := fi.Sys().(*syscall.Stat_t); int(st.Uid) != os.Getuid() {
+ return fmt.Errorf("socket: got uid %d, want %d for %q", st.Uid, os.Getuid(), s.Dir)
+ }
+ return nil
+}
projects / git.git / commitdiff