Links for %s

/* GoCheese -- Python private package repository and caching proxy Copyright (C) 2019 Sergey Matveev 2019 Elena Balakhonova This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 3 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ // Python private package repository and caching proxy package main import ( "bytes" "context" "crypto/sha256" "encoding/hex" "flag" "fmt" "io" "io/ioutil" "log" "net" "net/http" "net/url" "os" "os/signal" "path/filepath" "regexp" "runtime" "strings" "syscall" "time" "golang.org/x/net/netutil" ) const ( HTMLBegin = ` Links for %s ` HTMLEnd = " \n\n" HTMLElement = " %s
\n" SHA256Prefix = "sha256=" SHA256Ext = ".sha256" InternalFlag = ".internal" GPGSigExt = ".asc" GPGSigAttr = " data-gpg-sig=true" Warranty = `This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 3 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see .` ) var ( pkgPyPI = regexp.MustCompile(`^.*]*>(.+)
.*$`) Version string = "UNKNOWN" root = flag.String("root", "./packages", "Path to packages directory") bind = flag.String("bind", "[::]:8080", "Address to bind to") tlsCert = flag.String("tls-cert", "", "Path to TLS X.509 certificate") tlsKey = flag.String("tls-key", "", "Path to TLS X.509 private key") norefreshURLPath = flag.String("norefresh", "/norefresh/", "Non-refreshing URL path") refreshURLPath = flag.String("refresh", "/simple/", "Auto-refreshing URL path") gpgUpdateURLPath = flag.String("gpgupdate", "/gpgupdate/", "GPG forceful refreshing URL path") pypiURL = flag.String("pypi", "https://pypi.org/simple/", "Upstream PyPI URL") passwdPath = flag.String("passwd", "passwd", "Path to file with authenticators") passwdCheck = flag.Bool("passwd-check", false, "Test the -passwd file for syntax errors and exit") fsck = flag.Bool("fsck", false, "Check integrity of all packages") maxClients = flag.Int("maxclients", 128, "Maximal amount of simultaneous clients") version = flag.Bool("version", false, "Print version information") warranty = flag.Bool("warranty", false, "Print warranty information") killed bool normalizationRe *regexp.Regexp = regexp.MustCompilePOSIX("[-_.]+") ) func mkdirForPkg(w http.ResponseWriter, r *http.Request, dir string) bool { path := filepath.Join(*root, dir) if _, err := os.Stat(path); os.IsNotExist(err) { if err = os.Mkdir(path, os.FileMode(0777)); err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return false } log.Println(r.RemoteAddr, "mkdir", dir) } return true } func refreshDir( w http.ResponseWriter, r *http.Request, dir, filenameGet string, gpgUpdate bool, ) bool { if _, err := os.Stat(filepath.Join(*root, dir, InternalFlag)); err == nil { return true } resp, err := http.Get(*pypiURL + dir + "/") if err != nil { http.Error(w, err.Error(), http.StatusBadGateway) return false } body, err := ioutil.ReadAll(resp.Body) resp.Body.Close() if err != nil { http.Error(w, err.Error(), http.StatusBadGateway) return false } if !mkdirForPkg(w, r, dir) { return false } dirPath := filepath.Join(*root, dir) var submatches []string var uri string var filename string var path string var pkgURL *url.URL var digest []byte for _, lineRaw := range bytes.Split(body, []byte("\n")) { submatches = pkgPyPI.FindStringSubmatch(string(lineRaw)) if len(submatches) == 0 { continue } uri = submatches[1] filename = submatches[2] if pkgURL, err = url.Parse(uri); err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return false } digest, err = hex.DecodeString(strings.TrimPrefix(pkgURL.Fragment, SHA256Prefix)) if err != nil { http.Error(w, err.Error(), http.StatusBadGateway) return false } pkgURL.Fragment = "" path = filepath.Join(dirPath, filename) if filename == filenameGet { if killed { // Skip heavy remote call, when shutting down http.Error(w, "shutting down", http.StatusInternalServerError) return false } log.Println(r.RemoteAddr, "pypi download", filename) resp, err = http.Get(pkgURL.String()) if err != nil { http.Error(w, err.Error(), http.StatusBadGateway) return false } defer resp.Body.Close() hasher := sha256.New() dst, err := TempFile(dirPath) if err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return false } wr := io.MultiWriter(hasher, dst) if _, err = io.Copy(wr, resp.Body); err != nil { os.Remove(dst.Name()) dst.Close() http.Error(w, err.Error(), http.StatusInternalServerError) return false } if bytes.Compare(hasher.Sum(nil), digest) != 0 { log.Println(r.RemoteAddr, "pypi", filename, "digest mismatch") os.Remove(dst.Name()) dst.Close() http.Error(w, err.Error(), http.StatusBadGateway) return false } if err = dst.Sync(); err != nil { os.Remove(dst.Name()) dst.Close() http.Error(w, err.Error(), http.StatusInternalServerError) return false } dst.Close() if err = os.Rename(dst.Name(), path); err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return false } if err = DirSync(dirPath); err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return false } } if filename == filenameGet || gpgUpdate { if _, err = os.Stat(path); err != nil { goto GPGSigSkip } resp, err := http.Get(pkgURL.String() + GPGSigExt) if err != nil { goto GPGSigSkip } if resp.StatusCode != http.StatusOK { resp.Body.Close() goto GPGSigSkip } sig, err := ioutil.ReadAll(resp.Body) resp.Body.Close() if err != nil { goto GPGSigSkip } if err = WriteFileSync(dirPath, path+GPGSigExt, sig); err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return false } log.Println(r.RemoteAddr, "pypi downloaded signature", filename) } GPGSigSkip: path = path + SHA256Ext _, err = os.Stat(path) if err == nil { continue } if !os.IsNotExist(err) { http.Error(w, err.Error(), http.StatusInternalServerError) return false } log.Println(r.RemoteAddr, "pypi touch", filename) if err = WriteFileSync(dirPath, path, digest); err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return false } } return true } func listRoot(w http.ResponseWriter, r *http.Request) { files, err := ioutil.ReadDir(*root) if err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } var result bytes.Buffer result.WriteString(fmt.Sprintf(HTMLBegin, "root")) for _, file := range files { if file.Mode().IsDir() { result.WriteString(fmt.Sprintf( HTMLElement, *refreshURLPath+file.Name()+"/", file.Name(), )) } } result.WriteString(HTMLEnd) w.Write(result.Bytes()) } func listDir( w http.ResponseWriter, r *http.Request, dir string, autorefresh, gpgUpdate bool, ) { dirPath := filepath.Join(*root, dir) if autorefresh { if !refreshDir(w, r, dir, "", gpgUpdate) { return } } else if _, err := os.Stat(dirPath); os.IsNotExist(err) && !refreshDir(w, r, dir, "", false) { return } files, err := ioutil.ReadDir(dirPath) if err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } var result bytes.Buffer result.WriteString(fmt.Sprintf(HTMLBegin, dir)) var data []byte var gpgSigAttr string var filenameClean string for _, file := range files { if !strings.HasSuffix(file.Name(), SHA256Ext) { continue } if killed { // Skip expensive I/O when shutting down http.Error(w, "shutting down", http.StatusInternalServerError) return } data, err = ioutil.ReadFile(filepath.Join(dirPath, file.Name())) if err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } filenameClean = strings.TrimSuffix(file.Name(), SHA256Ext) if _, err = os.Stat(filepath.Join(dirPath, filenameClean+GPGSigExt)); os.IsNotExist(err) { gpgSigAttr = "" } else { gpgSigAttr = GPGSigAttr } result.WriteString(fmt.Sprintf( HTMLElement, strings.Join([]string{ *refreshURLPath, dir, "/", filenameClean, "#", SHA256Prefix, hex.EncodeToString(data), }, ""), gpgSigAttr, filenameClean, )) } result.WriteString(HTMLEnd) w.Write(result.Bytes()) } func servePkg(w http.ResponseWriter, r *http.Request, dir, filename string) { log.Println(r.RemoteAddr, "get", filename) path := filepath.Join(*root, dir, filename) if _, err := os.Stat(path); os.IsNotExist(err) { if !refreshDir(w, r, dir, filename, false) { return } } http.ServeFile(w, r, path) } func serveUpload(w http.ResponseWriter, r *http.Request) { // Authentication username, password, ok := r.BasicAuth() if !ok { log.Println(r.RemoteAddr, "unauthenticated", username) http.Error(w, "unauthenticated", http.StatusUnauthorized) return } auther, ok := passwords[username] if !ok || !auther.Auth(password) { log.Println(r.RemoteAddr, "unauthenticated", username) http.Error(w, "unauthenticated", http.StatusUnauthorized) return } // Form parsing var err error if err = r.ParseMultipartForm(1 << 20); err != nil { http.Error(w, err.Error(), http.StatusBadRequest) return } pkgNames, exists := r.MultipartForm.Value["name"] if !exists || len(pkgNames) != 1 { http.Error(w, "single name is expected in request", http.StatusBadRequest) return } dir := normalizationRe.ReplaceAllString(pkgNames[0], "-") dirPath := filepath.Join(*root, dir) var digestExpected []byte if digestExpectedHex, exists := r.MultipartForm.Value["sha256_digest"]; exists { digestExpected, err = hex.DecodeString(digestExpectedHex[0]) if err != nil { http.Error(w, "bad sha256_digest: "+err.Error(), http.StatusBadRequest) return } } gpgSigsExpected := make(map[string]struct{}) // Checking is it internal package if _, err = os.Stat(filepath.Join(dirPath, InternalFlag)); err != nil { log.Println(r.RemoteAddr, "non-internal package", dir) http.Error(w, "unknown internal package", http.StatusUnauthorized) return } for _, file := range r.MultipartForm.File["content"] { filename := file.Filename gpgSigsExpected[filename+GPGSigExt] = struct{}{} log.Println(r.RemoteAddr, "put", filename, "by", username) path := filepath.Join(dirPath, filename) if _, err = os.Stat(path); err == nil { log.Println(r.RemoteAddr, "already exists", filename) http.Error(w, "already exists", http.StatusBadRequest) return } if !mkdirForPkg(w, r, dir) { return } src, err := file.Open() defer src.Close() if err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } dst, err := TempFile(dirPath) if err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } hasher := sha256.New() wr := io.MultiWriter(hasher, dst) if _, err = io.Copy(wr, src); err != nil { os.Remove(dst.Name()) dst.Close() http.Error(w, err.Error(), http.StatusInternalServerError) return } if err = dst.Sync(); err != nil { os.Remove(dst.Name()) dst.Close() http.Error(w, err.Error(), http.StatusInternalServerError) return } dst.Close() digest := hasher.Sum(nil) if digestExpected != nil { if bytes.Compare(digestExpected, digest) == 0 { log.Println(r.RemoteAddr, filename, "good checksum received") } else { log.Println(r.RemoteAddr, filename, "bad checksum received") http.Error(w, "bad checksum", http.StatusBadRequest) os.Remove(dst.Name()) return } } if err = os.Rename(dst.Name(), path); err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } if err = DirSync(dirPath); err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } if err = WriteFileSync(dirPath, path+SHA256Ext, digest); err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } } for _, file := range r.MultipartForm.File["gpg_signature"] { filename := file.Filename if _, exists := gpgSigsExpected[filename]; !exists { http.Error(w, "unexpected GPG signature filename", http.StatusBadRequest) return } delete(gpgSigsExpected, filename) log.Println(r.RemoteAddr, "put", filename, "by", username) path := filepath.Join(dirPath, filename) if _, err = os.Stat(path); err == nil { log.Println(r.RemoteAddr, "already exists", filename) http.Error(w, "already exists", http.StatusBadRequest) return } src, err := file.Open() if err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } sig, err := ioutil.ReadAll(src) src.Close() if err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } if err = WriteFileSync(dirPath, path, sig); err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } } } func handler(w http.ResponseWriter, r *http.Request) { switch r.Method { case "GET": var path string var autorefresh bool var gpgUpdate bool if strings.HasPrefix(r.URL.Path, *norefreshURLPath) { path = strings.TrimPrefix(r.URL.Path, *norefreshURLPath) } else if strings.HasPrefix(r.URL.Path, *refreshURLPath) { path = strings.TrimPrefix(r.URL.Path, *refreshURLPath) autorefresh = true } else if strings.HasPrefix(r.URL.Path, *gpgUpdateURLPath) { path = strings.TrimPrefix(r.URL.Path, *gpgUpdateURLPath) autorefresh = true gpgUpdate = true } else { http.Error(w, "unknown action", http.StatusBadRequest) return } parts := strings.Split(strings.TrimSuffix(path, "/"), "/") if len(parts) > 2 { http.Error(w, "invalid path", http.StatusBadRequest) return } if len(parts) == 1 { if parts[0] == "" { listRoot(w, r) } else { listDir(w, r, parts[0], autorefresh, gpgUpdate) } } else { servePkg(w, r, parts[0], parts[1]) } case "POST": serveUpload(w, r) default: http.Error(w, "unknown action", http.StatusBadRequest) } } func goodIntegrity() bool { dirs, err := ioutil.ReadDir(*root) if err != nil { log.Fatal(err) } hasher := sha256.New() digest := make([]byte, sha256.Size) isGood := true var data []byte var pkgName string for _, dir := range dirs { files, err := ioutil.ReadDir(filepath.Join(*root, dir.Name())) if err != nil { log.Fatal(err) } for _, file := range files { if !strings.HasSuffix(file.Name(), SHA256Ext) { continue } pkgName = strings.TrimSuffix(file.Name(), SHA256Ext) data, err = ioutil.ReadFile(filepath.Join(*root, dir.Name(), pkgName)) if err != nil { if os.IsNotExist(err) { continue } log.Fatal(err) } hasher.Write(data) data, err = ioutil.ReadFile(filepath.Join(*root, dir.Name(), file.Name())) if err != nil { log.Fatal(err) } if bytes.Compare(hasher.Sum(digest[:0]), data) == 0 { log.Println(pkgName, "GOOD") } else { isGood = false log.Println(pkgName, "BAD") } hasher.Reset() } } return isGood } func main() { flag.Parse() if *warranty { fmt.Println(Warranty) return } if *version { fmt.Println("GoCheese version " + Version + " built with " + runtime.Version()) return } if *fsck { if !goodIntegrity() { os.Exit(1) } return } if *passwdCheck { refreshPasswd() return } if (*tlsCert != "" && *tlsKey == "") || (*tlsCert == "" && *tlsKey != "") { log.Fatalln("Both -tls-cert and -tls-key are required") } refreshPasswd() log.Println("root:", *root, "bind:", *bind) ln, err := net.Listen("tcp", *bind) if err != nil { log.Fatal(err) } ln = netutil.LimitListener(ln, *maxClients) server := &http.Server{ ReadTimeout: time.Minute, WriteTimeout: time.Minute, } http.HandleFunc(*norefreshURLPath, handler) http.HandleFunc(*refreshURLPath, handler) http.HandleFunc(*gpgUpdateURLPath, handler) needsRefreshPasswd := make(chan os.Signal, 0) needsShutdown := make(chan os.Signal, 0) exitErr := make(chan error, 0) signal.Notify(needsRefreshPasswd, syscall.SIGHUP) signal.Notify(needsShutdown, syscall.SIGTERM, syscall.SIGINT) go func() { for range needsRefreshPasswd { log.Println("Refreshing passwords") refreshPasswd() } }() go func(s *http.Server) { <-needsShutdown killed = true log.Println("Shutting down") ctx, cancel := context.WithTimeout(context.TODO(), time.Minute) exitErr <- s.Shutdown(ctx) cancel() }(server) if *tlsCert == "" { err = server.Serve(ln) } else { err = server.ServeTLS(ln, *tlsCert, *tlsKey) } if err != http.ErrServerClosed { log.Fatal(err) } if err := <-exitErr; err != nil { log.Fatal(err) } }