// CompleteMultipartUploadHandler - Complete multipart upload
func (api API) CompleteMultipartUploadHandler(w http.ResponseWriter, req *http.Request) {
	// Ticket master block
	{
		op := APIOperation{}
		op.ProceedCh = make(chan struct{})
		api.OP <- op
		// block until Ticket master gives us a go
		<-op.ProceedCh
	}

	vars := mux.Vars(req)
	bucket := vars["bucket"]
	object := vars["object"]

	objectResourcesMetadata := getObjectResources(req.URL.Query())

	var signature *signv4.Signature
	if !api.Anonymous {
		if _, ok := req.Header["Authorization"]; ok {
			// Init signature V4 verification
			var err *probe.Error
			signature, err = initSignatureV4(req)
			if err != nil {
				errorIf(err.Trace(), "Initializing signature v4 failed.", nil)
				writeErrorResponse(w, req, InternalError, req.URL.Path)
				return
			}
		}
	}

	metadata, err := api.XL.CompleteMultipartUpload(bucket, object, objectResourcesMetadata.UploadID, req.Body, signature)
	if err != nil {
		errorIf(err.Trace(), "CompleteMultipartUpload failed.", nil)
		switch err.ToGoError().(type) {
		case xl.InvalidUploadID:
			writeErrorResponse(w, req, NoSuchUpload, req.URL.Path)
		case xl.InvalidPart:
			writeErrorResponse(w, req, InvalidPart, req.URL.Path)
		case xl.InvalidPartOrder:
			writeErrorResponse(w, req, InvalidPartOrder, req.URL.Path)
		case signv4.MissingDateHeader:
			writeErrorResponse(w, req, RequestTimeTooSkewed, req.URL.Path)
		case signv4.DoesNotMatch:
			writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
		case xl.IncompleteBody:
			writeErrorResponse(w, req, IncompleteBody, req.URL.Path)
		case xl.MalformedXML:
			writeErrorResponse(w, req, MalformedXML, req.URL.Path)
		default:
			writeErrorResponse(w, req, InternalError, req.URL.Path)
		}
		return
	}
	response := generateCompleteMultpartUploadResponse(bucket, object, "", metadata.MD5Sum)
	encodedSuccessResponse := encodeSuccessResponse(response)
	// write headers
	setCommonHeaders(w, len(encodedSuccessResponse))
	// write body
	w.Write(encodedSuccessResponse)
}
示例#2
0
文件: error.go 项目: zhujo01/mc
// errorIf synonymous with fatalIf but doesn't exit on error != nil
func errorIf(err *probe.Error, msg string) {
	if err == nil {
		return
	}
	if globalJSONFlag {
		errorMessage := ErrorMessage{
			Message: msg,
			Type:    "error",
			Cause:   err.ToGoError(),
			SysInfo: err.SysInfo,
		}
		if globalDebugFlag {
			errorMessage.CallTrace = err.CallTrace
		}
		json, err := json.Marshal(struct {
			Error ErrorMessage `json:"error"`
		}{
			Error: errorMessage,
		})
		if err != nil {
			console.Fatalln(probe.NewError(err))
		}
		console.Println(string(json))
		return
	}
	if !globalDebugFlag {
		console.Errorln(fmt.Sprintf("%s %s", msg, err.ToGoError()))
		return
	}
	console.Errorln(fmt.Sprintf("%s %s", msg, err))
}
示例#3
0
文件: error.go 项目: fwessels/mc
// fatalIf wrapper function which takes error and selectively prints stack frames if available on debug
func fatalIf(err *probe.Error, msg string) {
	if err == nil {
		return
	}
	if globalJSON {
		errorMsg := errorMessage{
			Message: msg,
			Type:    "fatal",
			Cause: causeMessage{
				Message: err.ToGoError().Error(),
				Error:   err.ToGoError(),
			},
			SysInfo: err.SysInfo,
		}
		if globalDebug {
			errorMsg.CallTrace = err.CallTrace
		}
		json, err := json.Marshal(struct {
			Status string       `json:"status"`
			Error  errorMessage `json:"error"`
		}{
			Status: "error",
			Error:  errorMsg,
		})
		if err != nil {
			console.Fatalln(probe.NewError(err))
		}
		console.Println(string(json))
		console.Fatalln()
	}
	if !globalDebug {
		console.Fatalln(fmt.Sprintf("%s %s", msg, err.ToGoError()))
	}
	console.Fatalln(fmt.Sprintf("%s %s", msg, err))
}
示例#4
0
func mainMirror(ctx *cli.Context) {
	checkMirrorSyntax(ctx)

	setMirrorPalette(ctx.GlobalString("colors"))

	var e error
	session := newSessionV2()
	session.Header.CommandType = "mirror"
	session.Header.RootPath, e = os.Getwd()
	if e != nil {
		session.Delete()
		fatalIf(probe.NewError(e), "Unable to get current working folder.")
	}

	// extract URLs.
	var err *probe.Error
	session.Header.CommandArgs, err = args2URLs(ctx.Args())
	if err != nil {
		session.Delete()
		fatalIf(err.Trace(ctx.Args()...), fmt.Sprintf("One or more unknown argument types found in ‘%s’.", ctx.Args()))
	}

	doMirrorSession(session)
	session.Delete()
}
示例#5
0
func mainMirror(ctx *cli.Context) {
	checkMirrorSyntax(ctx)

	// Additional command speific theme customization.
	console.SetColor("Mirror", color.New(color.FgGreen, color.Bold))

	var e error
	session := newSessionV3()
	session.Header.CommandType = "mirror"
	session.Header.RootPath, e = os.Getwd()
	if e != nil {
		session.Delete()
		fatalIf(probe.NewError(e), "Unable to get current working folder.")
	}

	// If force flag is set save it with in session
	session.Header.CommandBoolFlag.Key = "force"
	session.Header.CommandBoolFlag.Value = ctx.Bool("force")

	// extract URLs.
	var err *probe.Error
	session.Header.CommandArgs, err = args2URLs(ctx.Args())
	if err != nil {
		session.Delete()
		fatalIf(err.Trace(ctx.Args()...), fmt.Sprintf("One or more unknown argument types found in ‘%s’.", ctx.Args()))
	}

	doMirrorSession(session)
	session.Delete()
}
示例#6
0
文件: cp-main.go 项目: zhujo01/mc
// mainCopy is bound to sub-command
func mainCopy(ctx *cli.Context) {
	checkCopySyntax(ctx)

	setCopyPalette(ctx.GlobalString("colors"))

	session := newSessionV2()

	var e error
	session.Header.CommandType = "cp"
	session.Header.RootPath, e = os.Getwd()
	if e != nil {
		session.Delete()
		fatalIf(probe.NewError(e), "Unable to get current working folder.")
	}

	// extract URLs.
	var err *probe.Error
	session.Header.CommandArgs, err = args2URLs(ctx.Args())
	if err != nil {
		session.Delete()
		fatalIf(err.Trace(), "One or more unknown URL types passed.")
	}

	doCopySession(session)
	session.Delete()
}
示例#7
0
// getObjectReaders -
func (b bucket) getObjectReaders(objectName, objectMeta string) (map[int]io.ReadCloser, *probe.Error) {
	readers := make(map[int]io.ReadCloser)
	var disks map[int]disk.Disk
	var err *probe.Error
	nodeSlice := 0
	for _, node := range b.nodes {
		disks, err = node.ListDisks()
		if err != nil {
			return nil, err.Trace()
		}
		for order, disk := range disks {
			var objectSlice io.ReadCloser
			bucketSlice := fmt.Sprintf("%s$%d$%d", b.name, nodeSlice, order)
			objectPath := filepath.Join(b.donutName, bucketSlice, objectName, objectMeta)
			objectSlice, err = disk.Open(objectPath)
			if err == nil {
				readers[order] = objectSlice
			}
		}
		nodeSlice = nodeSlice + 1
	}
	if err != nil {
		return nil, err.Trace()
	}
	return readers, nil
}
示例#8
0
// getBucketMetadataReaders - readers are returned in map rather than slice
func (xl API) getBucketMetadataReaders() (map[int]io.ReadCloser, *probe.Error) {
	readers := make(map[int]io.ReadCloser)
	disks := make(map[int]disk.Disk)
	var err *probe.Error
	for _, node := range xl.nodes {
		nDisks := make(map[int]disk.Disk)
		nDisks, err = node.ListDisks()
		if err != nil {
			return nil, err.Trace()
		}
		for k, v := range nDisks {
			disks[k] = v
		}
	}
	var bucketMetaDataReader io.ReadCloser
	for order, disk := range disks {
		bucketMetaDataReader, err = disk.Open(filepath.Join(xl.config.XLName, bucketMetadataConfig))
		if err != nil {
			continue
		}
		readers[order] = bucketMetaDataReader
	}
	if err != nil {
		return nil, err.Trace()
	}
	return readers, nil
}
示例#9
0
func fatalIf(err *probe.Error, msg string, fields map[string]interface{}) {
	if err == nil {
		return
	}
	if fields == nil {
		fields = make(map[string]interface{})
	}

	fields["error"] = err.ToGoError()
	if jsonErr, e := json.Marshal(err); e == nil {
		fields["probe"] = string(jsonErr)
	}
	log.WithFields(fields).Fatal(msg)
}
示例#10
0
文件: cat-main.go 项目: fwessels/mc
// catURL displays contents of a URL to stdout.
func catURL(sourceURL string) *probe.Error {
	var reader io.ReadSeeker
	switch sourceURL {
	case "-":
		reader = os.Stdin
	default:
		// Ignore size, since os.Stat() would not return proper size all the
		// time for local filesystem for example /proc files.
		var err *probe.Error
		if reader, err = getSource(sourceURL); err != nil {
			return err.Trace(sourceURL)
		}
	}
	return catOut(reader).Trace(sourceURL)
}
示例#11
0
// listXLBuckets -
func (xl API) listXLBuckets() *probe.Error {
	var disks map[int]disk.Disk
	var err *probe.Error
	for _, node := range xl.nodes {
		disks, err = node.ListDisks()
		if err != nil {
			return err.Trace()
		}
	}
	var dirs []os.FileInfo
	for _, disk := range disks {
		dirs, err = disk.ListDir(xl.config.XLName)
		if err == nil {
			break
		}
	}
	// if all disks are missing then return error
	if err != nil {
		return err.Trace()
	}
	for _, dir := range dirs {
		splitDir := strings.Split(dir.Name(), "$")
		if len(splitDir) < 3 {
			return probe.NewError(CorruptedBackend{Backend: dir.Name()})
		}
		bucketName := splitDir[0]
		// we dont need this once we cache from makeXLBucket()
		bkt, _, err := newBucket(bucketName, "private", xl.config.XLName, xl.nodes)
		if err != nil {
			return err.Trace()
		}
		xl.buckets[bucketName] = bkt
	}
	return nil
}
示例#12
0
// getNewClient gives a new client interface
func getNewClient(urlStr string, auth hostConfig) (client.Client, *probe.Error) {
	url := client.NewURL(urlStr)
	switch url.Type {
	case client.Object: // Minio and S3 compatible cloud storage
		s3Config := new(client.Config)
		s3Config.AccessKeyID = func() string {
			if auth.AccessKeyID == globalAccessKeyID {
				return ""
			}
			return auth.AccessKeyID
		}()
		s3Config.SecretAccessKey = func() string {
			if auth.SecretAccessKey == globalSecretAccessKey {
				return ""
			}
			return auth.SecretAccessKey
		}()
		s3Config.AppName = "Minio"
		s3Config.AppVersion = globalMCVersion
		s3Config.AppComments = []string{os.Args[0], runtime.GOOS, runtime.GOARCH}
		s3Config.HostURL = urlStr
		s3Config.Debug = globalDebugFlag

		var s3Client client.Client
		var err *probe.Error
		if auth.API == "S3v2" {
			s3Client, err = s3v2.New(s3Config)
		} else {
			s3Client, err = s3v4.New(s3Config)
		}
		if err != nil {
			return nil, err.Trace()
		}
		return s3Client, nil
	case client.Filesystem:
		fsClient, err := fs.New(urlStr)
		if err != nil {
			return nil, err.Trace()
		}
		return fsClient, nil
	}
	return nil, errInitClient(urlStr).Trace()
}
示例#13
0
文件: ls.go 项目: zhujo01/mc
// doListIncomplete - list all incomplete uploads entities inside a folder.
func doListIncomplete(clnt client.Client, recursive, multipleArgs bool) *probe.Error {
	var err *probe.Error
	var parentContent *client.Content
	parentContent, err = clnt.Stat()
	if err != nil {
		return err.Trace(clnt.URL().String())
	}
	for contentCh := range clnt.List(recursive, true) {
		if contentCh.Err != nil {
			switch contentCh.Err.ToGoError().(type) {
			// handle this specifically for filesystem
			case client.BrokenSymlink:
				errorIf(contentCh.Err.Trace(), "Unable to list broken link.")
				continue
			case client.TooManyLevelsSymlink:
				errorIf(contentCh.Err.Trace(), "Unable to list too many levels link.")
				continue
			}
			if os.IsNotExist(contentCh.Err.ToGoError()) || os.IsPermission(contentCh.Err.ToGoError()) {
				if contentCh.Content != nil {
					if contentCh.Content.Type.IsDir() && (contentCh.Content.Type&os.ModeSymlink == os.ModeSymlink) {
						errorIf(contentCh.Err.Trace(), "Unable to list broken folder link.")
						continue
					}
				}
				errorIf(contentCh.Err.Trace(), "Unable to list.")
				continue
			}
			err = contentCh.Err.Trace()
			break
		}
		if multipleArgs && parentContent.Type.IsDir() {
			contentCh.Content.Name = filepath.Join(parentContent.Name, strings.TrimPrefix(contentCh.Content.Name, parentContent.Name))
		}
		Prints("%s\n", parseContent(contentCh.Content))
	}
	if err != nil {
		return err.Trace()
	}
	return nil
}
示例#14
0
// getBucketMetadata -
func (b bucket) getBucketMetadata() (*AllBuckets, *probe.Error) {
	metadata := new(AllBuckets)
	var readers map[int]io.ReadCloser
	{
		var err *probe.Error
		readers, err = b.getBucketMetadataReaders()
		if err != nil {
			return nil, err.Trace()
		}
	}
	for _, reader := range readers {
		defer reader.Close()
	}
	var err error
	for _, reader := range readers {
		jenc := json.NewDecoder(reader)
		if err = jenc.Decode(metadata); err == nil {
			return metadata, nil
		}
	}
	return nil, probe.NewError(err)
}
示例#15
0
// getBucketMetadataReaders -
func (b bucket) getBucketMetadataReaders() (map[int]io.ReadCloser, *probe.Error) {
	readers := make(map[int]io.ReadCloser)
	var disks map[int]disk.Disk
	var err *probe.Error
	for _, node := range b.nodes {
		disks, err = node.ListDisks()
		if err != nil {
			return nil, err.Trace()
		}
	}
	var bucketMetaDataReader io.ReadCloser
	for order, disk := range disks {
		bucketMetaDataReader, err = disk.Open(filepath.Join(b.donutName, bucketMetadataConfig))
		if err != nil {
			continue
		}
		readers[order] = bucketMetaDataReader
	}
	if err != nil {
		return nil, err.Trace()
	}
	return readers, nil
}
示例#16
0
// New instantiate a new xl
func New() (Interface, *probe.Error) {
	var conf *Config
	var err *probe.Error
	conf, err = LoadConfig()
	if err != nil {
		conf = &Config{
			Version:     "0.0.1",
			MaxSize:     512000000,
			NodeDiskMap: nil,
			XLName:      "",
		}
		if err := quick.CheckData(conf); err != nil {
			return nil, err.Trace()
		}
	}
	a := API{config: conf}
	a.storedBuckets = metadata.NewCache()
	a.nodes = make(map[string]node)
	a.buckets = make(map[string]bucket)
	a.objects = data.NewCache(a.config.MaxSize)
	a.multiPartObjects = make(map[string]*data.Cache)
	a.objects.OnEvicted = a.evictedObject
	a.lock = new(sync.Mutex)

	if len(a.config.NodeDiskMap) > 0 {
		for k, v := range a.config.NodeDiskMap {
			if len(v) == 0 {
				return nil, probe.NewError(InvalidDisksArgument{})
			}
			err := a.AttachNode(k, v)
			if err != nil {
				return nil, err.Trace()
			}
		}
		/// Initialization, populate all buckets into memory
		buckets, err := a.listBuckets()
		if err != nil {
			return nil, err.Trace()
		}
		for k, v := range buckets {
			var newBucket = storedBucket{}
			newBucket.bucketMetadata = v
			newBucket.objectMetadata = make(map[string]ObjectMetadata)
			newBucket.multiPartSession = make(map[string]MultiPartSession)
			newBucket.partMetadata = make(map[string]map[int]PartMetadata)
			a.storedBuckets.Set(k, newBucket)
		}
		a.Heal()
	}
	return a, nil
}
示例#17
0
// getInheritedListeners - look for LISTEN_FDS in environment variables and populate listeners accordingly
func (n *minNet) getInheritedListeners() *probe.Error {
	var retErr *probe.Error
	n.inheritOnce.Do(func() {
		n.mutex.Lock()
		defer n.mutex.Unlock()
		countStr := os.Getenv(envCountKey)
		if countStr == "" {
			return
		}
		count, err := strconv.Atoi(countStr)
		if err != nil {
			retErr = probe.NewError(fmt.Errorf("found invalid count value: %s=%s", envCountKey, countStr))
			return
		}

		fdStart := 3
		for i := fdStart; i < fdStart+count; i++ {
			file := os.NewFile(uintptr(i), "listener")
			l, err := net.FileListener(file)
			if err != nil {
				file.Close()
				retErr = probe.NewError(err)
				return
			}
			if err := file.Close(); err != nil {
				retErr = probe.NewError(err)
				return
			}
			n.inheritedListeners = append(n.inheritedListeners, l)
		}
	})
	if retErr != nil {
		return retErr.Trace()
	}
	return nil
}
示例#18
0
文件: fs.go 项目: zhujo01/minio
// New instantiate a new donut
func New() (Filesystem, *probe.Error) {
	var err *probe.Error
	// load multiparts session from disk
	var multiparts *Multiparts
	multiparts, err = loadMultipartsSession()
	if err != nil {
		if os.IsNotExist(err.ToGoError()) {
			multiparts = &Multiparts{
				Version:       "1",
				ActiveSession: make(map[string]*MultipartSession),
			}
			if err := SaveMultipartsSession(multiparts); err != nil {
				return Filesystem{}, err.Trace()
			}
		} else {
			return Filesystem{}, err.Trace()
		}
	}
	a := Filesystem{lock: new(sync.Mutex)}
	a.multiparts = multiparts
	return a, nil
}
示例#19
0
// New instantiate a new donut
func New(rootPath string) (Filesystem, *probe.Error) {
	setFSBucketsConfigPath(filepath.Join(rootPath, "$buckets.json"))
	setFSMultipartsConfigPath(filepath.Join(rootPath, "$multiparts-session.json"))

	var err *probe.Error
	// load multiparts session from disk
	var multiparts *Multiparts
	multiparts, err = loadMultipartsSession()
	if err != nil {
		if os.IsNotExist(err.ToGoError()) {
			multiparts = &Multiparts{
				Version:       "1",
				ActiveSession: make(map[string]*MultipartSession),
			}
			if err := saveMultipartsSession(multiparts); err != nil {
				return Filesystem{}, err.Trace()
			}
		} else {
			return Filesystem{}, err.Trace()
		}
	}
	var buckets *Buckets
	buckets, err = loadBucketsMetadata()
	if err != nil {
		if os.IsNotExist(err.ToGoError()) {
			buckets = &Buckets{
				Version:  "1",
				Metadata: make(map[string]*BucketMetadata),
			}
			if err := saveBucketsMetadata(buckets); err != nil {
				return Filesystem{}, err.Trace()
			}
		} else {
			return Filesystem{}, err.Trace()
		}
	}
	a := Filesystem{lock: new(sync.Mutex)}
	a.path = rootPath
	a.multiparts = multiparts
	a.buckets = buckets
	return a, nil
}
示例#20
0
func serverMain(c *cli.Context) {
	checkServerSyntax(c)

	perr := initServer()
	fatalIf(perr.Trace(), "Failed to read config for minio.", nil)

	certFile := c.GlobalString("cert")
	keyFile := c.GlobalString("key")
	if (certFile != "" && keyFile == "") || (certFile == "" && keyFile != "") {
		fatalIf(probe.NewError(errInvalidArgument), "Both certificate and key are required to enable https.", nil)
	}

	var minFreeDisk int64
	minFreeDiskSet := false
	// Default
	minFreeDisk = 10

	var expiration time.Duration
	expirationSet := false

	args := c.Args()
	for len(args) >= 2 {
		switch args.First() {
		case "min-free-disk":
			if minFreeDiskSet {
				fatalIf(probe.NewError(errInvalidArgument), "Minimum free disk should be set only once.", nil)
			}
			args = args.Tail()
			var err *probe.Error
			minFreeDisk, err = parsePercentToInt(args.First(), 64)
			fatalIf(err.Trace(args.First()), "Invalid minium free disk size "+args.First()+" passed.", nil)
			args = args.Tail()
			minFreeDiskSet = true
		case "expiry":
			if expirationSet {
				fatalIf(probe.NewError(errInvalidArgument), "Expiration should be set only once.", nil)
			}
			args = args.Tail()
			var err error
			expiration, err = time.ParseDuration(args.First())
			fatalIf(probe.NewError(err), "Invalid expiration time "+args.First()+" passed.", nil)
			args = args.Tail()
			expirationSet = true
		default:
			cli.ShowCommandHelpAndExit(c, "server", 1) // last argument is exit code
		}
	}

	path := strings.TrimSpace(c.Args().Last())
	// Last argument is always path
	if _, err := os.Stat(path); err != nil {
		fatalIf(probe.NewError(err), "Unable to validate the path", nil)
	}
	tls := (certFile != "" && keyFile != "")
	apiServerConfig := cloudServerConfig{
		Address:     c.GlobalString("address"),
		AccessLog:   c.GlobalBool("enable-accesslog"),
		Anonymous:   c.GlobalBool("anonymous"),
		Path:        path,
		MinFreeDisk: minFreeDisk,
		Expiry:      expiration,
		TLS:         tls,
		CertFile:    certFile,
		KeyFile:     keyFile,
		RateLimit:   c.GlobalInt("ratelimit"),
	}
	perr = startServer(apiServerConfig)
	errorIf(perr.Trace(), "Failed to start the minio server.", nil)
}
// PutObjectPartHandler - Upload part
func (api API) PutObjectPartHandler(w http.ResponseWriter, req *http.Request) {
	// Ticket master block
	{
		op := APIOperation{}
		op.ProceedCh = make(chan struct{})
		api.OP <- op
		// block until Ticket master gives us a go
		<-op.ProceedCh
	}

	// get Content-MD5 sent by client and verify if valid
	md5 := req.Header.Get("Content-MD5")
	if !isValidMD5(md5) {
		writeErrorResponse(w, req, InvalidDigest, req.URL.Path)
		return
	}

	/// if Content-Length missing, throw away
	size := req.Header.Get("Content-Length")
	if size == "" {
		writeErrorResponse(w, req, MissingContentLength, req.URL.Path)
		return
	}

	/// maximum Upload size for multipart objects in a single operation
	if isMaxObjectSize(size) {
		writeErrorResponse(w, req, EntityTooLarge, req.URL.Path)
		return
	}

	var sizeInt64 int64
	{
		var err error
		sizeInt64, err = strconv.ParseInt(size, 10, 64)
		if err != nil {
			writeErrorResponse(w, req, InvalidRequest, req.URL.Path)
			return
		}
	}

	vars := mux.Vars(req)
	bucket := vars["bucket"]
	object := vars["object"]

	uploadID := req.URL.Query().Get("uploadId")
	partIDString := req.URL.Query().Get("partNumber")

	var partID int
	{
		var err error
		partID, err = strconv.Atoi(partIDString)
		if err != nil {
			writeErrorResponse(w, req, InvalidPart, req.URL.Path)
			return
		}
	}

	var signature *signv4.Signature
	if !api.Anonymous {
		if _, ok := req.Header["Authorization"]; ok {
			// Init signature V4 verification
			var err *probe.Error
			signature, err = initSignatureV4(req)
			if err != nil {
				errorIf(err.Trace(), "Initializing signature v4 failed.", nil)
				writeErrorResponse(w, req, InternalError, req.URL.Path)
				return
			}
		}
	}

	calculatedMD5, err := api.XL.CreateObjectPart(bucket, object, uploadID, partID, "", md5, sizeInt64, req.Body, signature)
	if err != nil {
		errorIf(err.Trace(), "CreateObjectPart failed.", nil)
		switch err.ToGoError().(type) {
		case xl.InvalidUploadID:
			writeErrorResponse(w, req, NoSuchUpload, req.URL.Path)
		case xl.ObjectExists:
			writeErrorResponse(w, req, MutableWriteNotAllowed, req.URL.Path)
		case xl.BadDigest:
			writeErrorResponse(w, req, BadDigest, req.URL.Path)
		case signv4.DoesNotMatch:
			writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
		case xl.IncompleteBody:
			writeErrorResponse(w, req, IncompleteBody, req.URL.Path)
		case xl.EntityTooLarge:
			writeErrorResponse(w, req, EntityTooLarge, req.URL.Path)
		case xl.InvalidDigest:
			writeErrorResponse(w, req, InvalidDigest, req.URL.Path)
		default:
			writeErrorResponse(w, req, InternalError, req.URL.Path)
		}
		return
	}
	w.Header().Set("ETag", calculatedMD5)
	writeSuccessResponse(w)
}
示例#22
0
// PutBucketHandler - PUT Bucket
// ----------
// This implementation of the PUT operation creates a new bucket for authenticated request
func (api CloudStorageAPI) PutBucketHandler(w http.ResponseWriter, req *http.Request) {
	vars := mux.Vars(req)
	bucket := vars["bucket"]

	if !api.Anonymous {
		if isRequestRequiresACLCheck(req) {
			writeErrorResponse(w, req, AccessDenied, req.URL.Path)
			return
		}
	}

	// read from 'x-amz-acl'
	aclType := getACLType(req)
	if aclType == unsupportedACLType {
		writeErrorResponse(w, req, NotImplemented, req.URL.Path)
		return
	}

	var signature *fs.Signature
	if !api.Anonymous {
		// Init signature V4 verification
		if isRequestSignatureV4(req) {
			var err *probe.Error
			signature, err = initSignatureV4(req)
			if err != nil {
				switch err.ToGoError() {
				case errInvalidRegion:
					errorIf(err.Trace(), "Unknown region in authorization header.", nil)
					writeErrorResponse(w, req, AuthorizationHeaderMalformed, req.URL.Path)
					return
				case errAccessKeyIDInvalid:
					errorIf(err.Trace(), "Invalid access key id.", nil)
					writeErrorResponse(w, req, InvalidAccessKeyID, req.URL.Path)
					return
				default:
					errorIf(err.Trace(), "Initializing signature v4 failed.", nil)
					writeErrorResponse(w, req, InternalError, req.URL.Path)
					return
				}
			}
		}
	}

	// if body of request is non-nil then check for validity of Content-Length
	if req.Body != nil {
		/// if Content-Length is unknown/missing, deny the request
		if req.ContentLength == -1 {
			writeErrorResponse(w, req, MissingContentLength, req.URL.Path)
			return
		}
		if signature != nil {
			locationBytes, err := ioutil.ReadAll(req.Body)
			if err != nil {
				sh := sha256.New()
				sh.Write(locationBytes)
				ok, perr := signature.DoesSignatureMatch(hex.EncodeToString(sh.Sum(nil)))
				if perr != nil {
					errorIf(perr.Trace(), "MakeBucket failed.", nil)
					writeErrorResponse(w, req, InternalError, req.URL.Path)
					return
				}
				if !ok {
					writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
					return
				}
			}
		}
	}

	err := api.Filesystem.MakeBucket(bucket, getACLTypeString(aclType))
	if err != nil {
		errorIf(err.Trace(), "MakeBucket failed.", nil)
		switch err.ToGoError().(type) {
		case fs.BucketNameInvalid:
			writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
		case fs.BucketExists:
			writeErrorResponse(w, req, BucketAlreadyExists, req.URL.Path)
		default:
			writeErrorResponse(w, req, InternalError, req.URL.Path)
		}
		return
	}
	// Make sure to add Location information here only for bucket
	w.Header().Set("Location", "/"+bucket)
	writeSuccessResponse(w, nil)
}
示例#23
0
// CompleteMultipartUploadHandler - Complete multipart upload
func (api CloudStorageAPI) CompleteMultipartUploadHandler(w http.ResponseWriter, req *http.Request) {
	vars := mux.Vars(req)
	bucket := vars["bucket"]
	object := vars["object"]

	if !api.Anonymous {
		if isRequestRequiresACLCheck(req) {
			writeErrorResponse(w, req, AccessDenied, req.URL.Path)
			return
		}
	}

	objectResourcesMetadata := getObjectResources(req.URL.Query())
	var signature *fs.Signature
	if !api.Anonymous {
		if isRequestSignatureV4(req) {
			// Init signature V4 verification
			var err *probe.Error
			signature, err = initSignatureV4(req)
			if err != nil {
				switch err.ToGoError() {
				case errInvalidRegion:
					errorIf(err.Trace(), "Unknown region in authorization header.", nil)
					writeErrorResponse(w, req, AuthorizationHeaderMalformed, req.URL.Path)
					return
				case errAccessKeyIDInvalid:
					errorIf(err.Trace(), "Invalid access key id.", nil)
					writeErrorResponse(w, req, InvalidAccessKeyID, req.URL.Path)
					return
				default:
					errorIf(err.Trace(), "Initializing signature v4 failed.", nil)
					writeErrorResponse(w, req, InternalError, req.URL.Path)
					return
				}
			}
		}
	}

	metadata, err := api.Filesystem.CompleteMultipartUpload(bucket, object, objectResourcesMetadata.UploadID, req.Body, signature)
	if err != nil {
		errorIf(err.Trace(), "CompleteMultipartUpload failed.", nil)
		switch err.ToGoError().(type) {
		case fs.BucketNameInvalid:
			writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
		case fs.BucketNotFound:
			writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
		case fs.ObjectNotFound:
			writeErrorResponse(w, req, NoSuchKey, req.URL.Path)
		case fs.ObjectNameInvalid:
			writeErrorResponse(w, req, NoSuchKey, req.URL.Path)
		case fs.InvalidUploadID:
			writeErrorResponse(w, req, NoSuchUpload, req.URL.Path)
		case fs.InvalidPart:
			writeErrorResponse(w, req, InvalidPart, req.URL.Path)
		case fs.InvalidPartOrder:
			writeErrorResponse(w, req, InvalidPartOrder, req.URL.Path)
		case fs.SignatureDoesNotMatch:
			writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
		case fs.IncompleteBody:
			writeErrorResponse(w, req, IncompleteBody, req.URL.Path)
		case fs.MalformedXML:
			writeErrorResponse(w, req, MalformedXML, req.URL.Path)
		default:
			writeErrorResponse(w, req, InternalError, req.URL.Path)
		}
		return
	}
	response := generateCompleteMultpartUploadResponse(bucket, object, req.URL.String(), metadata.Md5)
	encodedSuccessResponse := encodeSuccessResponse(response)
	// write headers
	setCommonHeaders(w)
	// write success response.
	writeSuccessResponse(w, encodedSuccessResponse)
}
示例#24
0
// PutObjectPartHandler - Upload part
func (api CloudStorageAPI) PutObjectPartHandler(w http.ResponseWriter, req *http.Request) {
	vars := mux.Vars(req)
	bucket := vars["bucket"]
	object := vars["object"]

	if !api.Anonymous {
		if isRequestRequiresACLCheck(req) {
			writeErrorResponse(w, req, AccessDenied, req.URL.Path)
			return
		}
	}

	// get Content-MD5 sent by client and verify if valid
	md5 := req.Header.Get("Content-MD5")
	if !isValidMD5(md5) {
		writeErrorResponse(w, req, InvalidDigest, req.URL.Path)
		return
	}

	/// if Content-Length is unknown/missing, throw away
	size := req.ContentLength
	if size == -1 {
		writeErrorResponse(w, req, MissingContentLength, req.URL.Path)
		return
	}

	/// maximum Upload size for multipart objects in a single operation
	if isMaxObjectSize(size) {
		writeErrorResponse(w, req, EntityTooLarge, req.URL.Path)
		return
	}

	uploadID := req.URL.Query().Get("uploadId")
	partIDString := req.URL.Query().Get("partNumber")

	var partID int
	{
		var err error
		partID, err = strconv.Atoi(partIDString)
		if err != nil {
			writeErrorResponse(w, req, InvalidPart, req.URL.Path)
			return
		}
	}

	var signature *fs.Signature
	if !api.Anonymous {
		if isRequestSignatureV4(req) {
			// Init signature V4 verification
			var err *probe.Error
			signature, err = initSignatureV4(req)
			if err != nil {
				switch err.ToGoError() {
				case errInvalidRegion:
					errorIf(err.Trace(), "Unknown region in authorization header.", nil)
					writeErrorResponse(w, req, AuthorizationHeaderMalformed, req.URL.Path)
					return
				case errAccessKeyIDInvalid:
					errorIf(err.Trace(), "Invalid access key id.", nil)
					writeErrorResponse(w, req, InvalidAccessKeyID, req.URL.Path)
					return
				default:
					errorIf(err.Trace(), "Initializing signature v4 failed.", nil)
					writeErrorResponse(w, req, InternalError, req.URL.Path)
					return
				}
			}
		}
	}

	calculatedMD5, err := api.Filesystem.CreateObjectPart(bucket, object, uploadID, md5, partID, size, req.Body, signature)
	if err != nil {
		errorIf(err.Trace(), "CreateObjectPart failed.", nil)
		switch err.ToGoError().(type) {
		case fs.RootPathFull:
			writeErrorResponse(w, req, RootPathFull, req.URL.Path)
		case fs.InvalidUploadID:
			writeErrorResponse(w, req, NoSuchUpload, req.URL.Path)
		case fs.BadDigest:
			writeErrorResponse(w, req, BadDigest, req.URL.Path)
		case fs.SignatureDoesNotMatch:
			writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
		case fs.IncompleteBody:
			writeErrorResponse(w, req, IncompleteBody, req.URL.Path)
		case fs.EntityTooLarge:
			writeErrorResponse(w, req, EntityTooLarge, req.URL.Path)
		case fs.InvalidDigest:
			writeErrorResponse(w, req, InvalidDigest, req.URL.Path)
		default:
			writeErrorResponse(w, req, InternalError, req.URL.Path)
		}
		return
	}
	w.Header().Set("ETag", "\""+calculatedMD5+"\"")
	writeSuccessResponse(w, nil)
}
示例#25
0
// PutObjectHandler - PUT Object
// ----------
// This implementation of the PUT operation adds an object to a bucket.
func (api CloudStorageAPI) PutObjectHandler(w http.ResponseWriter, req *http.Request) {
	var object, bucket string
	vars := mux.Vars(req)
	bucket = vars["bucket"]
	object = vars["object"]

	if !api.Anonymous {
		if isRequestRequiresACLCheck(req) {
			if api.Filesystem.IsPrivateBucket(bucket) || api.Filesystem.IsReadOnlyBucket(bucket) {
				writeErrorResponse(w, req, AccessDenied, req.URL.Path)
				return
			}
		}
	}

	// get Content-MD5 sent by client and verify if valid
	md5 := req.Header.Get("Content-MD5")
	if !isValidMD5(md5) {
		writeErrorResponse(w, req, InvalidDigest, req.URL.Path)
		return
	}
	/// if Content-Length is unknown/missing, deny the request
	size := req.ContentLength
	if size == -1 {
		writeErrorResponse(w, req, MissingContentLength, req.URL.Path)
		return
	}
	/// maximum Upload size for objects in a single operation
	if isMaxObjectSize(size) {
		writeErrorResponse(w, req, EntityTooLarge, req.URL.Path)
		return
	}

	var signature *fs.Signature
	if !api.Anonymous {
		if isRequestSignatureV4(req) {
			// Init signature V4 verification
			var err *probe.Error
			signature, err = initSignatureV4(req)
			if err != nil {
				switch err.ToGoError() {
				case errInvalidRegion:
					errorIf(err.Trace(), "Unknown region in authorization header.", nil)
					writeErrorResponse(w, req, AuthorizationHeaderMalformed, req.URL.Path)
					return
				case errAccessKeyIDInvalid:
					errorIf(err.Trace(), "Invalid access key id.", nil)
					writeErrorResponse(w, req, InvalidAccessKeyID, req.URL.Path)
					return
				default:
					errorIf(err.Trace(), "Initializing signature v4 failed.", nil)
					writeErrorResponse(w, req, InternalError, req.URL.Path)
					return
				}
			}
		}
	}

	metadata, err := api.Filesystem.CreateObject(bucket, object, md5, size, req.Body, signature)
	if err != nil {
		errorIf(err.Trace(), "CreateObject failed.", nil)
		switch err.ToGoError().(type) {
		case fs.RootPathFull:
			writeErrorResponse(w, req, RootPathFull, req.URL.Path)
		case fs.BucketNotFound:
			writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
		case fs.BucketNameInvalid:
			writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
		case fs.BadDigest:
			writeErrorResponse(w, req, BadDigest, req.URL.Path)
		case fs.MissingDateHeader:
			writeErrorResponse(w, req, RequestTimeTooSkewed, req.URL.Path)
		case fs.SignatureDoesNotMatch:
			writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
		case fs.IncompleteBody:
			writeErrorResponse(w, req, IncompleteBody, req.URL.Path)
		case fs.EntityTooLarge:
			writeErrorResponse(w, req, EntityTooLarge, req.URL.Path)
		case fs.InvalidDigest:
			writeErrorResponse(w, req, InvalidDigest, req.URL.Path)
		default:
			writeErrorResponse(w, req, InternalError, req.URL.Path)
		}
		return
	}
	w.Header().Set("ETag", "\""+metadata.Md5+"\"")
	writeSuccessResponse(w, nil)
}
// ListObjects - GET bucket (list objects)
func (fs Filesystem) ListObjects(bucket string, resources BucketResourcesMetadata) ([]ObjectMetadata, BucketResourcesMetadata, *probe.Error) {
	fs.lock.Lock()
	defer fs.lock.Unlock()
	if !IsValidBucketName(bucket) {
		return nil, resources, probe.NewError(BucketNameInvalid{Bucket: bucket})
	}
	if resources.Prefix != "" && IsValidObjectName(resources.Prefix) == false {
		return nil, resources, probe.NewError(ObjectNameInvalid{Bucket: bucket, Object: resources.Prefix})
	}

	p := bucketDir{}
	rootPrefix := filepath.Join(fs.path, bucket)
	// check bucket exists
	if _, err := os.Stat(rootPrefix); os.IsNotExist(err) {
		return nil, resources, probe.NewError(BucketNotFound{Bucket: bucket})
	}

	p.root = rootPrefix
	/// automatically treat incoming "/" as "\\" on windows due to its path constraints.
	if runtime.GOOS == "windows" {
		if resources.Prefix != "" {
			resources.Prefix = strings.Replace(resources.Prefix, "/", string(os.PathSeparator), -1)
		}
		if resources.Delimiter != "" {
			resources.Delimiter = strings.Replace(resources.Delimiter, "/", string(os.PathSeparator), -1)
		}
		if resources.Marker != "" {
			resources.Marker = strings.Replace(resources.Marker, "/", string(os.PathSeparator), -1)
		}
	}

	// if delimiter is supplied and not prefix then we are the very top level, list everything and move on.
	if resources.Delimiter != "" && resources.Prefix == "" {
		files, err := ioutil.ReadDir(rootPrefix)
		if err != nil {
			if os.IsNotExist(err) {
				return nil, resources, probe.NewError(BucketNotFound{Bucket: bucket})
			}
			return nil, resources, probe.NewError(err)
		}
		for _, fl := range files {
			if strings.HasSuffix(fl.Name(), "$multiparts") {
				continue
			}
			p.files = append(p.files, contentInfo{
				Prefix:   fl.Name(),
				Size:     fl.Size(),
				Mode:     fl.Mode(),
				ModTime:  fl.ModTime(),
				FileInfo: fl,
			})
		}
	}

	// If delimiter and prefix is supplied make sure that paging doesn't go deep, treat it as simple directory listing.
	if resources.Delimiter != "" && resources.Prefix != "" {
		if !strings.HasSuffix(resources.Prefix, resources.Delimiter) {
			fl, err := os.Stat(filepath.Join(rootPrefix, resources.Prefix))
			if err != nil {
				if os.IsNotExist(err) {
					return nil, resources, probe.NewError(ObjectNotFound{Bucket: bucket, Object: resources.Prefix})
				}
				return nil, resources, probe.NewError(err)
			}
			p.files = append(p.files, contentInfo{
				Prefix:   resources.Prefix,
				Size:     fl.Size(),
				Mode:     os.ModeDir,
				ModTime:  fl.ModTime(),
				FileInfo: fl,
			})
		} else {
			var prefixPath string
			if runtime.GOOS == "windows" {
				prefixPath = rootPrefix + string(os.PathSeparator) + resources.Prefix
			} else {
				prefixPath = rootPrefix + string(os.PathSeparator) + resources.Prefix
			}
			files, err := ioutil.ReadDir(prefixPath)
			if err != nil {
				switch err := err.(type) {
				case *os.PathError:
					if err.Op == "open" {
						return nil, resources, probe.NewError(ObjectNotFound{Bucket: bucket, Object: resources.Prefix})
					}
				}
				return nil, resources, probe.NewError(err)
			}
			for _, fl := range files {
				if strings.HasSuffix(fl.Name(), "$multiparts") {
					continue
				}
				prefix := fl.Name()
				if resources.Prefix != "" {
					prefix = filepath.Join(resources.Prefix, fl.Name())
				}
				p.files = append(p.files, contentInfo{
					Prefix:   prefix,
					Size:     fl.Size(),
					Mode:     fl.Mode(),
					ModTime:  fl.ModTime(),
					FileInfo: fl,
				})
			}
		}
	}
	if resources.Delimiter == "" {
		var files []contentInfo
		getAllFiles := func(fp string, fl os.FileInfo, err error) error {
			// If any error return back quickly
			if err != nil {
				return err
			}
			if strings.HasSuffix(fp, "$multiparts") {
				return nil
			}
			// if file pointer equals to rootPrefix - discard it
			if fp == p.root {
				return nil
			}
			if len(files) > resources.Maxkeys {
				return ErrSkipFile
			}
			// Split the root prefix from the incoming file pointer
			realFp := ""
			if runtime.GOOS == "windows" {
				if splits := strings.Split(fp, (p.root + string(os.PathSeparator))); len(splits) > 1 {
					realFp = splits[1]
				}
			} else {
				if splits := strings.Split(fp, (p.root + string(os.PathSeparator))); len(splits) > 1 {
					realFp = splits[1]
				}
			}
			// If path is a directory and has a prefix verify if the file pointer
			// has the prefix if it does not skip the directory.
			if fl.Mode().IsDir() {
				if resources.Prefix != "" {
					// Skip the directory on following situations
					// - when prefix is part of file pointer along with the root path
					// - when file pointer is part of the prefix along with root path
					if !strings.HasPrefix(fp, filepath.Join(p.root, resources.Prefix)) &&
						!strings.HasPrefix(filepath.Join(p.root, resources.Prefix), fp) {
						return ErrSkipDir
					}
				}
			}
			// If path is a directory and has a marker verify if the file split file pointer
			// is lesser than the Marker top level directory if yes skip it.
			if fl.Mode().IsDir() {
				if resources.Marker != "" {
					if realFp != "" {
						// For windows split with its own os.PathSeparator
						if runtime.GOOS == "windows" {
							if realFp < strings.Split(resources.Marker, string(os.PathSeparator))[0] {
								return ErrSkipDir
							}
						} else {
							if realFp < strings.Split(resources.Marker, string(os.PathSeparator))[0] {
								return ErrSkipDir
							}
						}
					}
				}
			}
			// If regular file verify
			if fl.Mode().IsRegular() {
				// If marker is present this will be used to check if filepointer is
				// lexically higher than then Marker
				if realFp != "" {
					if resources.Marker != "" {
						if realFp > resources.Marker {
							files = append(files, contentInfo{
								Prefix:   realFp,
								Size:     fl.Size(),
								Mode:     fl.Mode(),
								ModTime:  fl.ModTime(),
								FileInfo: fl,
							})
						}
					} else {
						files = append(files, contentInfo{
							Prefix:   realFp,
							Size:     fl.Size(),
							Mode:     fl.Mode(),
							ModTime:  fl.ModTime(),
							FileInfo: fl,
						})
					}
				}
			}
			// If file is a symlink follow it and populate values.
			if fl.Mode()&os.ModeSymlink == os.ModeSymlink {
				st, err := os.Stat(fp)
				if err != nil {
					return nil
				}
				// If marker is present this will be used to check if filepointer is
				// lexically higher than then Marker
				if realFp != "" {
					if resources.Marker != "" {
						if realFp > resources.Marker {
							files = append(files, contentInfo{
								Prefix:   realFp,
								Size:     st.Size(),
								Mode:     st.Mode(),
								ModTime:  st.ModTime(),
								FileInfo: st,
							})
						}
					} else {
						files = append(files, contentInfo{
							Prefix:   realFp,
							Size:     st.Size(),
							Mode:     st.Mode(),
							ModTime:  st.ModTime(),
							FileInfo: st,
						})
					}
				}
			}
			p.files = files
			return nil
		}
		// If no delimiter is specified, crawl through everything.
		err := Walk(rootPrefix, getAllFiles)
		if err != nil {
			if os.IsNotExist(err) {
				return nil, resources, probe.NewError(ObjectNotFound{Bucket: bucket, Object: resources.Prefix})
			}
			return nil, resources, probe.NewError(err)
		}
	}

	var metadataList []ObjectMetadata
	var metadata ObjectMetadata

	// Filter objects
	for _, content := range p.files {
		if len(metadataList) == resources.Maxkeys {
			resources.IsTruncated = true
			if resources.IsTruncated && resources.Delimiter != "" {
				resources.NextMarker = metadataList[len(metadataList)-1].Object
			}
			break
		}
		if content.Prefix > resources.Marker {
			var err *probe.Error
			metadata, resources, err = fs.filterObjects(bucket, content, resources)
			if err != nil {
				return nil, resources, err.Trace()
			}
			// If windows replace all the incoming paths to API compatible paths
			if runtime.GOOS == "windows" {
				metadata.Object = sanitizeWindowsPath(metadata.Object)
			}
			if metadata.Bucket != "" {
				metadataList = append(metadataList, metadata)
			}
		}
	}
	// Sanitize common prefixes back into API compatible paths
	if runtime.GOOS == "windows" {
		resources.CommonPrefixes = sanitizeWindowsPaths(resources.CommonPrefixes...)
	}
	return metadataList, resources, nil
}
示例#27
0
文件: fs.go 项目: m120/minio
// New instantiate a new donut
func New(rootPath string) (Filesystem, *probe.Error) {
	setFSBucketsConfigPath(filepath.Join(rootPath, "$buckets.json"))
	setFSMultipartsConfigPath(filepath.Join(rootPath, "$multiparts-session.json"))

	var err *probe.Error
	// load multiparts session from disk
	var multiparts *Multiparts
	multiparts, err = loadMultipartsSession()
	if err != nil {
		if os.IsNotExist(err.ToGoError()) {
			multiparts = &Multiparts{
				Version:       "1",
				ActiveSession: make(map[string]*MultipartSession),
			}
			if err := saveMultipartsSession(multiparts); err != nil {
				return Filesystem{}, err.Trace()
			}
		} else {
			return Filesystem{}, err.Trace()
		}
	}
	var buckets *Buckets
	buckets, err = loadBucketsMetadata()
	if err != nil {
		if os.IsNotExist(err.ToGoError()) {
			buckets = &Buckets{
				Version:  "1",
				Metadata: make(map[string]*BucketMetadata),
			}
			if err := saveBucketsMetadata(buckets); err != nil {
				return Filesystem{}, err.Trace()
			}
		} else {
			return Filesystem{}, err.Trace()
		}
	}
	fs := Filesystem{lock: new(sync.Mutex)}
	fs.path = rootPath
	fs.multiparts = multiparts
	fs.buckets = buckets
	/// Defaults

	// maximum buckets to be listed from list buckets.
	fs.maxBuckets = 1000
	// minium free disk required for i/o operations to succeed.
	fs.minFreeDisk = 10

	// Start list goroutine.
	if err = fs.listObjectsService(); err != nil {
		return Filesystem{}, err.Trace(rootPath)
	}
	// Return here.
	return fs, nil
}
// PutBucketHandler - PUT Bucket
// ----------
// This implementation of the PUT operation creates a new bucket for authenticated request
func (api API) PutBucketHandler(w http.ResponseWriter, req *http.Request) {
	// Ticket master block
	{
		op := APIOperation{}
		op.ProceedCh = make(chan struct{})
		api.OP <- op
		// block until Ticket master gives us a go
		<-op.ProceedCh
	}

	if _, err := stripAccessKeyID(req.Header.Get("Authorization")); err != nil {
		writeErrorResponse(w, req, AccessDenied, req.URL.Path)
		return
	}

	// read from 'x-amz-acl'
	aclType := getACLType(req)
	if aclType == unsupportedACLType {
		writeErrorResponse(w, req, NotImplemented, req.URL.Path)
		return
	}

	vars := mux.Vars(req)
	bucket := vars["bucket"]

	var signature *signv4.Signature
	if !api.Anonymous {
		if _, ok := req.Header["Authorization"]; ok {
			// Init signature V4 verification
			var err *probe.Error
			signature, err = initSignatureV4(req)
			if err != nil {
				errorIf(err.Trace(), "Initializing signature v4 failed.", nil)
				writeErrorResponse(w, req, InternalError, req.URL.Path)
				return
			}
		}
	}

	// if body of request is non-nil then check for validity of Content-Length
	if req.Body != nil {
		/// if Content-Length missing, deny the request
		size := req.Header.Get("Content-Length")
		if size == "" {
			writeErrorResponse(w, req, MissingContentLength, req.URL.Path)
			return
		}
	}

	err := api.Donut.MakeBucket(bucket, getACLTypeString(aclType), req.Body, signature)
	if err != nil {
		errorIf(err.Trace(), "MakeBucket failed.", nil)
		switch err.ToGoError().(type) {
		case signv4.DoesNotMatch:
			writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
		case donut.TooManyBuckets:
			writeErrorResponse(w, req, TooManyBuckets, req.URL.Path)
		case donut.BucketNameInvalid:
			writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
		case donut.BucketExists:
			writeErrorResponse(w, req, BucketAlreadyExists, req.URL.Path)
		default:
			writeErrorResponse(w, req, InternalError, req.URL.Path)
		}
		return
	}
	// Make sure to add Location information here only for bucket
	w.Header().Set("Location", "/"+bucket)
	writeSuccessResponse(w)
}
func (s rpcSignatureHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	var signature *rpcSignature
	if isRequestSignatureRPC(r) {
		// Init signature V4 verification
		var err *probe.Error
		signature, err = initSignatureRPC(r)
		if err != nil {
			switch err.ToGoError() {
			case errInvalidRegion:
				errorIf(err.Trace(), "Unknown region in authorization header.", nil)
				writeErrorResponse(w, r, AuthorizationHeaderMalformed, r.URL.Path)
				return
			case errAccessKeyIDInvalid:
				errorIf(err.Trace(), "Invalid access key id.", nil)
				writeErrorResponse(w, r, InvalidAccessKeyID, r.URL.Path)
				return
			default:
				errorIf(err.Trace(), "Initializing signature v4 failed.", nil)
				writeErrorResponse(w, r, InternalError, r.URL.Path)
				return
			}
		}
		buffer := new(bytes.Buffer)
		if _, err := io.Copy(buffer, r.Body); err != nil {
			errorIf(probe.NewError(err), "Unable to read payload from request body.", nil)
			writeErrorResponse(w, r, InternalError, r.URL.Path)
			return
		}
		value := sha256.Sum256(buffer.Bytes())
		ok, err := signature.DoesSignatureMatch(hex.EncodeToString(value[:]))
		if err != nil {
			errorIf(err.Trace(), "Unable to verify signature.", nil)
			writeErrorResponse(w, r, InternalError, r.URL.Path)
			return
		}
		if !ok {
			writeErrorResponse(w, r, SignatureDoesNotMatch, r.URL.Path)
			return
		}
		// Copy the buffer back into request body to be read by the RPC service callers
		r.Body = ioutil.NopCloser(buffer)
		s.handler.ServeHTTP(w, r)
	} else {
		writeErrorResponse(w, r, AccessDenied, r.URL.Path)
	}
}
func (fs Filesystem) filterObjects(bucket string, content contentInfo, resources BucketResourcesMetadata) (ObjectMetadata, BucketResourcesMetadata, *probe.Error) {
	var err *probe.Error
	var metadata ObjectMetadata

	name := content.Prefix
	switch true {
	// Both delimiter and Prefix is present
	case resources.Delimiter != "" && resources.Prefix != "":
		if strings.HasPrefix(name, resources.Prefix) {
			trimmedName := strings.TrimPrefix(name, resources.Prefix)
			delimitedName := delimiter(trimmedName, resources.Delimiter)
			switch true {
			case name == resources.Prefix:
				// Use resources.Prefix to filter out delimited file
				metadata, err = getMetadata(fs.path, bucket, name)
				if err != nil {
					return ObjectMetadata{}, resources, err.Trace()
				}
				if metadata.Mode.IsDir() {
					resources.CommonPrefixes = append(resources.CommonPrefixes, name+resources.Delimiter)
					return ObjectMetadata{}, resources, nil
				}
			case delimitedName == content.FileInfo.Name():
				// Use resources.Prefix to filter out delimited files
				metadata, err = getMetadata(fs.path, bucket, name)
				if err != nil {
					return ObjectMetadata{}, resources, err.Trace()
				}
				if metadata.Mode.IsDir() {
					resources.CommonPrefixes = append(resources.CommonPrefixes, name+resources.Delimiter)
					return ObjectMetadata{}, resources, nil
				}
			case delimitedName != "":
				resources.CommonPrefixes = append(resources.CommonPrefixes, resources.Prefix+delimitedName)
			}
		}
	// Delimiter present and Prefix is absent
	case resources.Delimiter != "" && resources.Prefix == "":
		delimitedName := delimiter(name, resources.Delimiter)
		switch true {
		case delimitedName == "":
			metadata, err = getMetadata(fs.path, bucket, name)
			if err != nil {
				return ObjectMetadata{}, resources, err.Trace()
			}
			if metadata.Mode.IsDir() {
				resources.CommonPrefixes = append(resources.CommonPrefixes, name+resources.Delimiter)
				return ObjectMetadata{}, resources, nil
			}
		case delimitedName == content.FileInfo.Name():
			metadata, err = getMetadata(fs.path, bucket, name)
			if err != nil {
				return ObjectMetadata{}, resources, err.Trace()
			}
			if metadata.Mode.IsDir() {
				resources.CommonPrefixes = append(resources.CommonPrefixes, name+resources.Delimiter)
				return ObjectMetadata{}, resources, nil
			}
		case delimitedName != "":
			resources.CommonPrefixes = append(resources.CommonPrefixes, delimitedName)
		}
	// Delimiter is absent and only Prefix is present
	case resources.Delimiter == "" && resources.Prefix != "":
		if strings.HasPrefix(name, resources.Prefix) {
			// Do not strip prefix object output
			metadata, err = getMetadata(fs.path, bucket, name)
			if err != nil {
				return ObjectMetadata{}, resources, err.Trace()
			}
		}
	default:
		metadata, err = getMetadata(fs.path, bucket, name)
		if err != nil {
			return ObjectMetadata{}, resources, err.Trace()
		}
	}
	sortUnique(sort.StringSlice(resources.CommonPrefixes))
	return metadata, resources, nil
}