Golang client.Client类代码示例

func (c *syncCmd) RunCommand(args []string) error {
	if c.loop && !c.removeSrc {
		return cmdmain.UsageError("Can't use --loop without --removesrc")
	}
	if c.verbose {
		c.logger = log.New(os.Stderr, "", 0) // else nil
	}
	if c.all {
		err := c.syncAll()
		if err != nil {
			return fmt.Errorf("sync all failed: %v", err)
		}
		return nil
	}
	if c.dest == "" {
		return cmdmain.UsageError("No --dest specified.")
	}

	discl := c.discoClient()
	discl.SetLogger(c.logger)
	src, err := discl.BlobRoot()
	if err != nil {
		return fmt.Errorf("Failed to get blob source: %v", err)
	}

	sc := client.New(src)
	sc.SetupAuth()
	sc.SetLogger(c.logger)

	dc := client.New(c.dest)
	dc.SetupAuth()
	dc.SetLogger(c.logger)

	var tc *client.Client
	if c.third != "" {
		tc = client.New(c.third)
		tc.SetupAuth()
		tc.SetLogger(c.logger)
	}

	passNum := 0
	for {
		passNum++
		stats, err := c.doPass(sc, dc, tc)
		if c.verbose {
			log.Printf("sync stats - pass: %d, blobs: %d, bytes %d\n", passNum, stats.BlobsCopied, stats.BytesCopied)
		}
		if err != nil {
			return fmt.Errorf("sync failed: %v", err)
		}
		if !c.loop {
			break
		}
	}
	return nil
}

// discoClient returns a client initialized with a server
// based from --src or from the configuration file if --src
// is blank. The returned client can then be used to discover
// the blobRoot and syncHandlers.
func discoClient() *client.Client {
	var cl *client.Client
	if *flagSrc == "" {
		cl = client.NewOrFail()
	} else {
		cl = client.New(*flagSrc)
	}
	cl.SetupAuth()
	return cl
}

// discoClient returns a client initialized with a server
// based from --src or from the configuration file if --src
// is blank. The returned client can then be used to discover
// the blobRoot and syncHandlers.
func (c *syncCmd) discoClient() *client.Client {
	var cl *client.Client
	if c.src == "" {
		cl = client.NewOrFail()
	} else {
		cl = client.New(c.src)
	}
	cl.SetupAuth()
	return cl
}

func fetch(cl *client.Client, br *blobref.BlobRef) (r io.ReadCloser, err error) {
	if *flagVerbose {
		log.Printf("Fetching %s", br.String())
	}
	if len(viaRefs) > 0 {
		r, _, err = cl.FetchVia(br, viaRefs)
	} else {
		r, _, err = cl.FetchStreaming(br)
	}
	if err != nil {
		return nil, fmt.Errorf("Failed to fetch %q: %s", br, err)
	}
	return r, err
}

// discoClient returns a client initialized with a server
// based from --src or from the configuration file if --src
// is blank. The returned client can then be used to discover
// the blobRoot and syncHandlers.
func (c *syncCmd) discoClient() *client.Client {
	var cl *client.Client
	if c.src == "" {
		cl = client.NewOrFail()
	} else {
		cl = client.New(c.src)
	}
	cl.SetLogger(c.logger)
	cl.InsecureTLS = c.insecureTLS
	cl.SetHTTPClient(&http.Client{
		Transport: cl.TransportForConfig(nil),
	})
	cl.SetupAuth()
	return cl
}

// discoClient returns a client initialized with a server
// based from the configuration file. The returned client
// can then be used to discover the blobRoot and syncHandlers.
func (c *indexCmd) discoClient() *client.Client {
	var cl *client.Client
	cl = client.NewOrFail()
	cl.InsecureTLS = c.insecureTLS
	cl.SetHTTPClient(&http.Client{
		Transport: cl.TransportForConfig(nil),
	})
	cl.SetupAuth()
	return cl
}

func (c *claimsCmd) client() *client.Client {
	var cl *client.Client
	if c.src == "" {
		cl = client.NewOrFail()
	} else {
		cl = client.New(c.src)
	}
	cl.SetLogger(c.logger)
	cl.SetHTTPClient(&http.Client{
		Transport: cl.TransportForConfig(nil),
	})
	cl.SetupAuth()
	return cl
}

func newUploader() *Uploader {
	var cc *client.Client
	var httpStats *httputil.StatsTransport
	if d := *flagBlobDir; d != "" {
		ss, err := dir.New(d)
		if err != nil && d == "discard" {
			ss = discardStorage{}
			err = nil
		}
		if err != nil {
			log.Fatalf("Error using dir %s as storage: %v", d, err)
		}
		cc = client.NewStorageClient(ss)
	} else {
		cc = client.NewOrFail()
		proxy := http.ProxyFromEnvironment
		if flagProxyLocal {
			proxy = proxyFromEnvironment
		}
		tr := cc.TransportForConfig(
			&client.TransportConfig{
				Proxy:   proxy,
				Verbose: *flagHTTP,
			})
		httpStats, _ = tr.(*httputil.StatsTransport)
		cc.SetHTTPClient(&http.Client{Transport: tr})
	}
	if *cmdmain.FlagVerbose {
		cc.SetLogger(log.New(cmdmain.Stderr, "", log.LstdFlags))
	} else {
		cc.SetLogger(nil)
	}

	pwd, err := os.Getwd()
	if err != nil {
		log.Fatalf("os.Getwd: %v", err)
	}

	return &Uploader{
		Client:    cc,
		transport: httpStats,
		pwd:       pwd,
		fdGate:    syncutil.NewGate(100), // gate things that waste fds, assuming a low system limit
	}
}

// newClient returns a Camlistore client for the server.
// The server may be:
//   * blank, to use the default in the config file
//   * an alias, to use that named alias in the config file
//   * host:port
//   * https?://host[:port][/path]
func newClient(server string) *client.Client {
	var cl *client.Client
	if server == "" {
		cl = client.NewOrFail()
	} else {
		cl = client.New(server)
		if err := cl.SetupAuth(); err != nil {
			log.Fatalf("Could not setup auth for connecting to %v: %v", server, err)
		}
	}
	cl.SetHTTPClient(&http.Client{
		Transport: cl.TransportForConfig(nil),
	})
	return cl
}

func main() {
	client.AddFlags()
	flag.Parse()

	if *flagVersion {
		fmt.Fprintf(os.Stderr, "camget version: %s\n", buildinfo.Version())
		return
	}

	if *flagGraph && flag.NArg() != 1 {
		log.Fatalf("The --graph option requires exactly one parameter.")
	}

	var cl *client.Client
	var items []*blobref.BlobRef

	if *flagShared != "" {
		if client.ExplicitServer() != "" {
			log.Fatal("Can't use --shared with an explicit blobserver; blobserver is implicit from the --shared URL.")
		}
		if flag.NArg() != 0 {
			log.Fatal("No arguments permitted when using --shared")
		}
		cl1, target, err := client.NewFromShareRoot(*flagShared,
			client.OptionInsecure(*flagInsecureTLS))
		if err != nil {
			log.Fatal(err)
		}
		cl = cl1
		items = append(items, target)
	} else {
		cl = client.NewOrFail()
		for n := 0; n < flag.NArg(); n++ {
			arg := flag.Arg(n)
			br := blobref.Parse(arg)
			if br == nil {
				log.Fatalf("Failed to parse argument %q as a blobref.", arg)
			}
			items = append(items, br)
		}
	}

	cl.InsecureTLS = *flagInsecureTLS
	tr := cl.TransportForConfig(&client.TransportConfig{
		Verbose: *flagHTTP,
	})
	httpStats, _ := tr.(*httputil.StatsTransport)
	cl.SetHTTPClient(&http.Client{Transport: tr})

	diskCacheFetcher, err := cacher.NewDiskCache(cl)
	if err != nil {
		log.Fatalf("Error setting up local disk cache: %v", err)
	}
	defer diskCacheFetcher.Clean()
	if *flagVerbose {
		log.Printf("Using temp blob cache directory %s", diskCacheFetcher.Root)
	}

	for _, br := range items {
		if *flagGraph {
			printGraph(diskCacheFetcher, br)
			return
		}
		if *flagCheck {
			// TODO: do HEAD requests checking if the blobs exists.
			log.Fatal("not implemented")
			return
		}
		if *flagOutput == "-" {
			var rc io.ReadCloser
			var err error
			if *flagContents {
				rc, err = schema.NewFileReader(diskCacheFetcher, br)
				if err == nil {
					rc.(*schema.FileReader).LoadAllChunks()
				}
			} else {
				rc, err = fetch(diskCacheFetcher, br)
			}
			if err != nil {
				log.Fatal(err)
			}
			defer rc.Close()
			if _, err := io.Copy(os.Stdout, rc); err != nil {
				log.Fatalf("Failed reading %q: %v", br, err)
			}
		} else {
			if err := smartFetch(diskCacheFetcher, *flagOutput, br); err != nil {
				log.Fatal(err)
			}
		}
	}

	if *flagVerbose {
		log.Printf("HTTP requests: %d\n", httpStats.Requests())
	}
}

func doPass(sc, dc *client.Client, passNum int) (stats SyncStats, retErr error) {
	srcBlobs := make(chan blobref.SizedBlobRef, 100)
	destBlobs := make(chan blobref.SizedBlobRef, 100)
	srcErr := make(chan error)
	destErr := make(chan error)

	go func() {
		srcErr <- sc.EnumerateBlobs(srcBlobs)
	}()
	checkSourceError := func() {
		if err := <-srcErr; err != nil {
			retErr = errors.New(fmt.Sprintf("Enumerate error from source: %v", err))
		}
	}

	if *flagDest == "stdout" {
		for sb := range srcBlobs {
			fmt.Printf("%s %d\n", sb.BlobRef, sb.Size)
		}
		checkSourceError()
		return
	}

	go func() {
		destErr <- dc.EnumerateBlobs(destBlobs)
	}()
	checkDestError := func() {
		if err := <-destErr; err != nil {
			retErr = errors.New(fmt.Sprintf("Enumerate error from destination: %v", err))
		}
	}

	destNotHaveBlobs := make(chan blobref.SizedBlobRef, 100)
	go client.ListMissingDestinationBlobs(destNotHaveBlobs, srcBlobs, destBlobs)
	for sb := range destNotHaveBlobs {
		fmt.Printf("Destination needs blob: %s\n", sb)

		blobReader, size, err := sc.FetchStreaming(sb.BlobRef)
		if err != nil {
			stats.ErrorCount++
			log.Printf("Error fetching %s: %v", sb.BlobRef, err)
			continue
		}
		if size != sb.Size {
			stats.ErrorCount++
			log.Printf("Source blobserver's enumerate size of %d for blob %s doesn't match its Get size of %d",
				sb.Size, sb.BlobRef, size)
			continue
		}
		uh := &client.UploadHandle{BlobRef: sb.BlobRef, Size: size, Contents: blobReader}
		pr, err := dc.Upload(uh)
		if err != nil {
			stats.ErrorCount++
			log.Printf("Upload of %s to destination blobserver failed: %v", sb.BlobRef, err)
			continue
		}
		if !pr.Skipped {
			stats.BlobsCopied++
			stats.BytesCopied += pr.Size
		}
		if *flagRemoveSource {
			if err = sc.RemoveBlob(sb.BlobRef); err != nil {
				stats.ErrorCount++
				log.Printf("Failed to delete %s from source: %v", sb.BlobRef, err)
			}
		}
	}

	checkSourceError()
	checkDestError()
	if retErr == nil && stats.ErrorCount > 0 {
		retErr = errors.New(fmt.Sprintf("%d errors during sync", stats.ErrorCount))
	}
	return stats, retErr
}

func main() {
	client.AddFlags()
	flag.Parse()

	if *cmdmain.FlagHelp {
		flag.PrintDefaults()
	}

	if *flagVersion {
		fmt.Fprintf(os.Stderr, "camget version: %s\n", buildinfo.Version())
		return
	}

	if *cmdmain.FlagLegal {
		cmdmain.PrintLicenses()
		return
	}

	if *flagGraph && flag.NArg() != 1 {
		log.Fatalf("The --graph option requires exactly one parameter.")
	}

	var cl *client.Client
	var items []blob.Ref

	optTransportConfig := client.OptionTransportConfig(&client.TransportConfig{
		Verbose: *flagHTTP,
	})

	if *flagShared != "" {
		if client.ExplicitServer() != "" {
			log.Fatal("Can't use --shared with an explicit blobserver; blobserver is implicit from the --shared URL.")
		}
		if flag.NArg() != 0 {
			log.Fatal("No arguments permitted when using --shared")
		}
		cl1, target, err := client.NewFromShareRoot(*flagShared,
			client.OptionInsecure(*flagInsecureTLS),
			client.OptionTrustedCert(*flagTrustedCert),
			optTransportConfig,
		)
		if err != nil {
			log.Fatal(err)
		}
		cl = cl1
		items = append(items, target)
	} else {
		if *flagTrustedCert != "" {
			log.Fatal("Can't use --cert without --shared.")
		}
		cl = client.NewOrFail(client.OptionInsecure(*flagInsecureTLS), optTransportConfig)
		for n := 0; n < flag.NArg(); n++ {
			arg := flag.Arg(n)
			br, ok := blob.Parse(arg)
			if !ok {
				log.Fatalf("Failed to parse argument %q as a blobref.", arg)
			}
			items = append(items, br)
		}
	}

	httpStats := cl.HTTPStats()

	diskCacheFetcher, err := cacher.NewDiskCache(cl)
	if err != nil {
		log.Fatalf("Error setting up local disk cache: %v", err)
	}
	defer diskCacheFetcher.Clean()
	if *flagVerbose {
		log.Printf("Using temp blob cache directory %s", diskCacheFetcher.Root)
	}
	if *flagShared != "" {
		diskCacheFetcher.SetCacheHitHook(func(br blob.Ref, rc io.ReadCloser) (io.ReadCloser, error) {
			var buf bytes.Buffer
			if err := cl.UpdateShareChain(br, io.TeeReader(rc, &buf)); err != nil {
				rc.Close()
				return nil, err
			}
			return struct {
				io.Reader
				io.Closer
			}{io.MultiReader(&buf, rc), rc}, nil
		})
	}

	for _, br := range items {
		if *flagGraph {
			printGraph(diskCacheFetcher, br)
			return
		}
		if *flagCheck {
			// TODO: do HEAD requests checking if the blobs exists.
			log.Fatal("not implemented")
			return
		}
		if *flagOutput == "-" {
			var rc io.ReadCloser
			var err error
			if *flagContents {
				rc, err = schema.NewFileReader(diskCacheFetcher, br)
//.........这里部分代码省略.........

func main() {
	var conn *fuse.Conn

	// Scans the arg list and sets up flags
	client.AddFlags()
	flag.Usage = usage
	flag.Parse()

	if *cmdmain.FlagLegal {
		cmdmain.PrintLicenses()
		return
	}

	if *cmdmain.FlagHelp {
		usage()
	}

	narg := flag.NArg()
	if narg > 2 {
		usage()
	}

	var mountPoint string
	var err error
	if narg > 0 {
		mountPoint = flag.Arg(0)
	} else {
		mountPoint, err = ioutil.TempDir("", "cammount")
		if err != nil {
			log.Fatal(err)
		}
		log.Printf("No mount point given. Using: %s", mountPoint)
		defer os.Remove(mountPoint)
	}

	errorf := func(msg string, args ...interface{}) {
		fmt.Fprintf(os.Stderr, msg, args...)
		fmt.Fprint(os.Stderr, "\n")
		usage()
	}

	var (
		cl    *client.Client
		root  blob.Ref // nil if only one arg
		camfs *fs.CamliFileSystem
	)
	if narg == 2 {
		rootArg := flag.Arg(1)
		// not trying very hard since NewFromShareRoot will do it better with a regex
		if strings.HasPrefix(rootArg, "http://") ||
			strings.HasPrefix(rootArg, "https://") {
			if client.ExplicitServer() != "" {
				errorf("Can't use an explicit blobserver with a share URL; the blobserver is implicit from the share URL.")
			}
			var err error
			cl, root, err = client.NewFromShareRoot(rootArg)
			if err != nil {
				log.Fatal(err)
			}
		} else {
			cl = client.NewOrFail() // automatic from flags

			var ok bool
			root, ok = blob.Parse(rootArg)

			if !ok {
				// not a blobref, check for root name instead
				req := &search.WithAttrRequest{N: 1, Attr: "camliRoot", Value: rootArg}
				wres, err := cl.GetPermanodesWithAttr(req)

				if err != nil {
					log.Fatal("could not query search")
				}

				if wres.WithAttr != nil {
					root = wres.WithAttr[0].Permanode
				} else {
					log.Fatalf("root specified is not a blobref or name of a root: %q\n", rootArg)
				}
			}
		}
	} else {
		cl = client.NewOrFail() // automatic from flags
	}

	diskCacheFetcher, err := cacher.NewDiskCache(cl)
	if err != nil {
		log.Fatalf("Error setting up local disk cache: %v", err)
	}
	defer diskCacheFetcher.Clean()
	if root.Valid() {
		var err error
		camfs, err = fs.NewRootedCamliFileSystem(cl, diskCacheFetcher, root)
		if err != nil {
			log.Fatalf("Error creating root with %v: %v", root, err)
		}
	} else {
		camfs = fs.NewDefaultCamliFileSystem(cl, diskCacheFetcher)
	}

//.........这里部分代码省略.........

func doPass(sc, dc *client.Client, passNum int) (stats SyncStats, retErr error) {
	srcBlobs := make(chan blobref.SizedBlobRef, 100)
	destBlobs := make(chan blobref.SizedBlobRef, 100)
	srcErr := make(chan error)
	destErr := make(chan error)

	go func() {
		srcErr <- sc.SimpleEnumerateBlobs(srcBlobs)
	}()
	checkSourceError := func() {
		if err := <-srcErr; err != nil {
			retErr = fmt.Errorf("Enumerate error from source: %v", err)
		}
	}

	if *flagDest == "stdout" {
		for sb := range srcBlobs {
			fmt.Printf("%s %d\n", sb.BlobRef, sb.Size)
		}
		checkSourceError()
		return
	}

	go func() {
		destErr <- dc.SimpleEnumerateBlobs(destBlobs)
	}()
	checkDestError := func() {
		if err := <-destErr; err != nil {
			retErr = errors.New(fmt.Sprintf("Enumerate error from destination: %v", err))
		}
	}

	destNotHaveBlobs := make(chan blobref.SizedBlobRef)
	sizeMismatch := make(chan *blobref.BlobRef)
	readSrcBlobs := srcBlobs
	if *flagVerbose {
		readSrcBlobs = loggingBlobRefChannel(srcBlobs)
	}
	mismatches := []*blobref.BlobRef{}
	go client.ListMissingDestinationBlobs(destNotHaveBlobs, sizeMismatch, readSrcBlobs, destBlobs)
For:
	for {
		select {
		case br := <-sizeMismatch:
			// TODO(bradfitz): check both sides and repair, carefully.  For now, fail.
			log.Printf("WARNING: blobref %v has differing sizes on source and est", br)
			stats.ErrorCount++
			mismatches = append(mismatches, br)
		case sb, ok := <-destNotHaveBlobs:
			if !ok {
				break For
			}
			fmt.Printf("Destination needs blob: %s\n", sb)

			blobReader, size, err := sc.FetchStreaming(sb.BlobRef)
			if err != nil {
				stats.ErrorCount++
				log.Printf("Error fetching %s: %v", sb.BlobRef, err)
				continue
			}
			if size != sb.Size {
				stats.ErrorCount++
				log.Printf("Source blobserver's enumerate size of %d for blob %s doesn't match its Get size of %d",
					sb.Size, sb.BlobRef, size)
				continue
			}
			uh := &client.UploadHandle{BlobRef: sb.BlobRef, Size: size, Contents: blobReader}
			pr, err := dc.Upload(uh)
			if err != nil {
				stats.ErrorCount++
				log.Printf("Upload of %s to destination blobserver failed: %v", sb.BlobRef, err)
				continue
			}
			if !pr.Skipped {
				stats.BlobsCopied++
				stats.BytesCopied += pr.Size
			}
			if *flagRemoveSource {
				if err = sc.RemoveBlob(sb.BlobRef); err != nil {
					stats.ErrorCount++
					log.Printf("Failed to delete %s from source: %v", sb.BlobRef, err)
				}
			}
		}
	}

	checkSourceError()
	checkDestError()
	if retErr == nil && stats.ErrorCount > 0 {
		retErr = errors.New(fmt.Sprintf("%d errors during sync", stats.ErrorCount))
	}
	return stats, retErr
}

func main() {
	var conn *fuse.Conn

	// Scans the arg list and sets up flags
	client.AddFlags()
	flag.Parse()

	narg := flag.NArg()
	if narg > 2 {
		usage()
	}

	var mountPoint string
	var err error
	if narg > 0 {
		mountPoint = flag.Arg(0)
	} else {
		mountPoint, err = ioutil.TempDir("", "cammount")
		if err != nil {
			log.Fatal(err)
		}
		defer os.Remove(mountPoint)
	}

	errorf := func(msg string, args ...interface{}) {
		fmt.Fprintf(os.Stderr, msg, args...)
		fmt.Fprint(os.Stderr, "\n")
		usage()
	}

	var (
		cl    *client.Client
		root  blob.Ref // nil if only one arg
		camfs *fs.CamliFileSystem
	)
	if narg == 2 {
		rootArg := flag.Arg(1)
		// not trying very hard since NewFromShareRoot will do it better with a regex
		if strings.HasPrefix(rootArg, "http://") ||
			strings.HasPrefix(rootArg, "https://") {
			if client.ExplicitServer() != "" {
				errorf("Can't use an explicit blobserver with a share URL; the blobserver is implicit from the share URL.")
			}
			var err error
			cl, root, err = client.NewFromShareRoot(rootArg)
			if err != nil {
				log.Fatal(err)
			}
		} else {
			cl = client.NewOrFail() // automatic from flags
			var ok bool
			root, ok = blob.Parse(rootArg)
			if !ok {
				log.Fatalf("Error parsing root blobref: %q\n", rootArg)
			}
			cl.SetHTTPClient(&http.Client{Transport: cl.TransportForConfig(nil)})
		}
	} else {
		cl = client.NewOrFail() // automatic from flags
		cl.SetHTTPClient(&http.Client{Transport: cl.TransportForConfig(nil)})
	}

	diskCacheFetcher, err := cacher.NewDiskCache(cl)
	if err != nil {
		log.Fatalf("Error setting up local disk cache: %v", err)
	}
	defer diskCacheFetcher.Clean()
	if root.Valid() {
		var err error
		camfs, err = fs.NewRootedCamliFileSystem(diskCacheFetcher, root)
		if err != nil {
			log.Fatalf("Error creating root with %v: %v", root, err)
		}
	} else {
		camfs = fs.NewCamliFileSystem(cl, diskCacheFetcher)
	}

	if *debug {
		fuse.Debugf = log.Printf
		// TODO: set fs's logger
	}

	// This doesn't appear to work on OS X:
	sigc := make(chan os.Signal, 1)

	conn, err = fuse.Mount(mountPoint)
	if err != nil {
		if err.Error() == "cannot find load_fusefs" && runtime.GOOS == "darwin" {
			log.Fatal("FUSE not available; install from http://osxfuse.github.io/")
		}
		log.Fatalf("Mount: %v", err)
	}

	xtermDone := make(chan bool, 1)
	if *xterm {
		cmd := exec.Command("xterm")
		cmd.Dir = mountPoint
		if err := cmd.Start(); err != nil {
			log.Printf("Error starting xterm: %v", err)
		} else {
//.........这里部分代码省略.........