Update s3 library again

Godeps/Godeps.json

@@ -24,8 +24,8 @@
 		},
 		{
 			"ImportPath": "github.com/minio/minio-go",
-			"Comment": "v0.2.5-187-gad1597d",
+			"Comment": "v0.2.5-195-gf30b6ca",
-			"Rev": "ad1597d864f56f608f8a1694ae9b5970fef57eb6"
+			"Rev": "f30b6ca90bfda7578f6a11b7ba6af2eae7b0510c"
 		},
 		{
 			"ImportPath": "github.com/pkg/sftp",

Godeps/_workspace/src/github.com/minio/minio-go/.travis.yml

@@ -3,7 +3,7 @@ go:
 - 1.5.1
 script:
 - go vet ./...
-- go test -race -v ./...
+- go test -test.short -race -v ./...
 notifications:
   slack:
     secure: HrOX2k6F/sEl6Rr4m5vHOdJCIwV42be0kz1Jy/WSMvrl/fQ8YkldKviLeWh4aWt1kclsYhNQ4FqGML+RIZYsdOqej4fAw9Vi5pZkI1MzPJq0UjrtMqkqzvD90eDGQYCKwaXjEIN8cohwJeb6X0B0HKAd9sqJW5GH5SwnhH5WWP8=

Godeps/_workspace/src/github.com/minio/minio-go/api-definitions.go

@@ -71,20 +71,20 @@ type ObjectMultipartStat struct {
 	Err error
 }
 
-// partMetadata - container for each partMetadata.
+// partData - container for each part.
-type partMetadata struct {
+type partData struct {
 	MD5Sum     []byte
 	Sha256Sum  []byte
 	ReadCloser io.ReadCloser
 	Size       int64
-	Number     int // partMetadata number.
+	Number     int // partData number.
 
 	// Error
 	Err error
 }
 
-// putObjectMetadata - container for each single PUT operation.
+// putObjectData - container for each single PUT operation.
-type putObjectMetadata struct {
+type putObjectData struct {
 	MD5Sum      []byte
 	Sha256Sum   []byte
 	ReadCloser  io.ReadCloser

Godeps/_workspace/src/github.com/minio/minio-go/api-error-response.go

@@ -218,6 +218,16 @@ func ErrInvalidObjectName(message string) error {
 	}
 }
 
+// ErrInvalidParts - invalid number of parts.
+func ErrInvalidParts(expectedParts, uploadedParts int) error {
+	msg := fmt.Sprintf("Unexpected number of parts found Want %d, Got %d", expectedParts, uploadedParts)
+	return ErrorResponse{
+		Code:      "InvalidParts",
+		Message:   msg,
+		RequestID: "minio",
+	}
+}
+
 // ErrInvalidObjectPrefix - invalid object prefix response is
 // similar to object name response.
 var ErrInvalidObjectPrefix = ErrInvalidObjectName

Godeps/_workspace/src/github.com/minio/minio-go/api-fput-object.go

@@ -93,7 +93,7 @@ func (c Client) FPutObject(bucketName, objectName, filePath, contentType string)
 	// NOTE: Google Cloud Storage multipart Put is not compatible with Amazon S3 APIs.
 	// Current implementation will only upload a maximum of 5GiB to Google Cloud Storage servers.
 	if isGoogleEndpoint(c.endpointURL) {
-		if fileSize <= -1 || fileSize > int64(maxSinglePutObjectSize) {
+		if fileSize > int64(maxSinglePutObjectSize) {
 			return 0, ErrorResponse{
 				Code:       "NotImplemented",
 				Message:    fmt.Sprintf("Invalid Content-Length %d for file uploads to Google Cloud Storage.", fileSize),
@@ -108,7 +108,7 @@ func (c Client) FPutObject(bucketName, objectName, filePath, contentType string)
 
 	// NOTE: S3 doesn't allow anonymous multipart requests.
 	if isAmazonEndpoint(c.endpointURL) && c.anonymous {
-		if fileSize <= -1 || fileSize > int64(maxSinglePutObjectSize) {
+		if fileSize > int64(maxSinglePutObjectSize) {
 			return 0, ErrorResponse{
 				Code:       "NotImplemented",
 				Message:    fmt.Sprintf("For anonymous requests Content-Length cannot be %d.", fileSize),
@@ -121,14 +121,11 @@ func (c Client) FPutObject(bucketName, objectName, filePath, contentType string)
 		return n, err
 	}
 
-	// Large file upload is initiated for uploads for input data size
+	// Small object upload is initiated for uploads for input data size smaller than 5MiB.
-	// if its greater than 5MiB or data size is negative.
+	if fileSize < minimumPartSize {
-	if fileSize >= minimumPartSize || fileSize < 0 {
+		return c.putSmallObject(bucketName, objectName, fileData, fileSize, contentType)
-		n, err := c.fputLargeObject(bucketName, objectName, fileData, fileSize, contentType)
-		return n, err
 	}
-	n, err := c.putSmallObject(bucketName, objectName, fileData, fileSize, contentType)
+	return c.fputLargeObject(bucketName, objectName, fileData, fileSize, contentType)
-	return n, err
 }
 
 // computeHash - calculates MD5 and Sha256 for an input read Seeker.
@@ -192,7 +189,6 @@ func (c Client) fputLargeObject(bucketName, objectName string, fileData *os.File
 	var prevMaxPartSize int64
 	// Loop through all parts and calculate totalUploadedSize.
 	for _, partInfo := range partsInfo {
-		totalUploadedSize += partInfo.Size
 		// Choose the maximum part size.
 		if partInfo.Size >= prevMaxPartSize {
 			prevMaxPartSize = partInfo.Size
@@ -206,11 +202,14 @@ func (c Client) fputLargeObject(bucketName, objectName string, fileData *os.File
 		partSize = prevMaxPartSize
 	}
 
-	// Part number always starts with '1'.
+	// Part number always starts with '0'.
-	partNumber := 1
+	partNumber := 0
 
 	// Loop through until EOF.
 	for totalUploadedSize < fileSize {
+		// Increment part number.
+		partNumber++
+
 		// Get a section reader on a particular offset.
 		sectionReader := io.NewSectionReader(fileData, totalUploadedSize, partSize)
 
@@ -221,7 +220,7 @@ func (c Client) fputLargeObject(bucketName, objectName string, fileData *os.File
 		}
 
 		// Save all the part metadata.
-		partMdata := partMetadata{
+		prtData := partData{
 			ReadCloser: ioutil.NopCloser(sectionReader),
 			Size:       size,
 			MD5Sum:     md5Sum,
@@ -229,31 +228,26 @@ func (c Client) fputLargeObject(bucketName, objectName string, fileData *os.File
 			Number:     partNumber, // Part number to be uploaded.
 		}
 
-		// If part number already uploaded, move to the next one.
+		// If part not uploaded proceed to upload.
-		if isPartUploaded(objectPart{
+		if !isPartUploaded(objectPart{
-			ETag:       hex.EncodeToString(partMdata.MD5Sum),
+			ETag:       hex.EncodeToString(prtData.MD5Sum),
-			PartNumber: partMdata.Number,
+			PartNumber: prtData.Number,
 		}, partsInfo) {
-			// Close the read closer.
-			partMdata.ReadCloser.Close()
-			continue
-		}
-
 			// Upload the part.
-		objPart, err := c.uploadPart(bucketName, objectName, uploadID, partMdata)
+			objPart, err := c.uploadPart(bucketName, objectName, uploadID, prtData)
 			if err != nil {
-			partMdata.ReadCloser.Close()
+				prtData.ReadCloser.Close()
 				return totalUploadedSize, err
 			}
+			// Save successfully uploaded part metadata.
+			partsInfo[prtData.Number] = objPart
+		}
+
+		// Close the read closer for temporary file.
+		prtData.ReadCloser.Close()
 
 		// Save successfully uploaded size.
-		totalUploadedSize += partMdata.Size
+		totalUploadedSize += prtData.Size
-
-		// Save successfully uploaded part metadata.
-		partsInfo[partMdata.Number] = objPart
-
-		// Increment to next part number.
-		partNumber++
 	}
 
 	// if totalUploadedSize is different than the file 'size'. Do not complete the request throw an error.
@@ -269,6 +263,11 @@ func (c Client) fputLargeObject(bucketName, objectName string, fileData *os.File
 		completeMultipartUpload.Parts = append(completeMultipartUpload.Parts, complPart)
 	}
 
+	// If partNumber is different than total list of parts, error out.
+	if partNumber != len(completeMultipartUpload.Parts) {
+		return totalUploadedSize, ErrInvalidParts(partNumber, len(completeMultipartUpload.Parts))
+	}
+
 	// Sort all completed parts.
 	sort.Sort(completedParts(completeMultipartUpload.Parts))
 	_, err = c.completeMultipartUpload(bucketName, objectName, uploadID, completeMultipartUpload)

Godeps/_workspace/src/github.com/minio/minio-go/api-get.go

@@ -365,9 +365,12 @@ func (c Client) getObject(bucketName, objectName string, offset, length int64) (
 			return nil, ObjectStat{}, HTTPRespToErrorResponse(resp, bucketName, objectName)
 		}
 	}
-	// trim off the odd double quotes.
+
-	md5sum := strings.Trim(resp.Header.Get("ETag"), "\"")
+	// Trim off the odd double quotes from ETag in the beginning and end.
-	// parse the date.
+	md5sum := strings.TrimPrefix(resp.Header.Get("ETag"), "\"")
+	md5sum = strings.TrimSuffix(md5sum, "\"")
+
+	// Parse the date.
 	date, err := time.Parse(http.TimeFormat, resp.Header.Get("Last-Modified"))
 	if err != nil {
 		msg := "Last-Modified time format not recognized. " + reportIssue
@@ -379,6 +382,7 @@ func (c Client) getObject(bucketName, objectName string, offset, length int64) (
 			AmzBucketRegion: resp.Header.Get("x-amz-bucket-region"),
 		}
 	}
+	// Get content-type.
 	contentType := strings.TrimSpace(resp.Header.Get("Content-Type"))
 	if contentType == "" {
 		contentType = "application/octet-stream"

Godeps/_workspace/src/github.com/minio/minio-go/api-list.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"net/http"
 	"net/url"
+	"strings"
 )
 
 // ListBuckets list all buckets owned by this authenticated user.
@@ -393,6 +394,9 @@ func (c Client) listObjectParts(bucketName, objectName, uploadID string) (partsI
 		}
 		// Append to parts info.
 		for _, part := range listObjPartsResult.ObjectParts {
+			// Trim off the odd double quotes from ETag in the beginning and end.
+			part.ETag = strings.TrimPrefix(part.ETag, "\"")
+			part.ETag = strings.TrimSuffix(part.ETag, "\"")
 			partsInfo[part.PartNumber] = part
 		}
 		// Keep part number marker, for the next iteration.

Godeps/_workspace/src/github.com/minio/minio-go/api-put-object-partial.go

@@ -17,11 +17,14 @@
 package minio
 
 import (
+	"bytes"
 	"crypto/md5"
 	"crypto/sha256"
 	"errors"
+	"fmt"
 	"hash"
 	"io"
+	"io/ioutil"
 	"sort"
 )
 
@@ -34,9 +37,187 @@ func (c Client) PutObjectPartial(bucketName, objectName string, data ReadAtClose
 	if err := isValidObjectName(objectName); err != nil {
 		return 0, err
 	}
+	// Input size negative should return error.
+	if size < 0 {
+		return 0, ErrInvalidArgument("Input file size cannot be negative.")
+	}
+	// Input size bigger than 5TiB should fail.
+	if size > int64(maxMultipartPutObjectSize) {
+		return 0, ErrInvalidArgument("Input file size is bigger than the supported maximum of 5TiB.")
+	}
 
-	// Cleanup any previously left stale files, as the function exits.
+	// NOTE: Google Cloud Storage does not implement Amazon S3 Compatible multipart PUT.
-	defer cleanupStaleTempfiles("multiparts$-putobject-partial")
+	// So we fall back to single PUT operation with the maximum limit of 5GiB.
+	if isGoogleEndpoint(c.endpointURL) {
+		if size > int64(maxSinglePutObjectSize) {
+			return 0, ErrorResponse{
+				Code:       "NotImplemented",
+				Message:    fmt.Sprintf("Invalid Content-Length %d for file uploads to Google Cloud Storage.", size),
+				Key:        objectName,
+				BucketName: bucketName,
+			}
+		}
+		// Do not compute MD5 for Google Cloud Storage. Uploads upto 5GiB in size.
+		n, err := c.putPartialNoChksum(bucketName, objectName, data, size, contentType)
+		return n, err
+	}
+
+	// NOTE: S3 doesn't allow anonymous multipart requests.
+	if isAmazonEndpoint(c.endpointURL) && c.anonymous {
+		if size > int64(maxSinglePutObjectSize) {
+			return 0, ErrorResponse{
+				Code:       "NotImplemented",
+				Message:    fmt.Sprintf("For anonymous requests Content-Length cannot be %d.", size),
+				Key:        objectName,
+				BucketName: bucketName,
+			}
+		}
+		// Do not compute MD5 for anonymous requests to Amazon S3. Uploads upto 5GiB in size.
+		n, err := c.putPartialAnonymous(bucketName, objectName, data, size, contentType)
+		return n, err
+	}
+
+	// Small file upload is initiated for uploads for input data size smaller than 5MiB.
+	if size < minimumPartSize {
+		n, err = c.putPartialSmallObject(bucketName, objectName, data, size, contentType)
+		return n, err
+	}
+	n, err = c.putPartialLargeObject(bucketName, objectName, data, size, contentType)
+	return n, err
+
+}
+
+// putNoChecksumPartial special function used Google Cloud Storage. This special function
+// is used for Google Cloud Storage since Google's multipart API is not S3 compatible.
+func (c Client) putPartialNoChksum(bucketName, objectName string, data ReadAtCloser, size int64, contentType string) (n int64, err error) {
+	// Input validation.
+	if err := isValidBucketName(bucketName); err != nil {
+		return 0, err
+	}
+	if err := isValidObjectName(objectName); err != nil {
+		return 0, err
+	}
+	if size > maxPartSize {
+		return 0, ErrEntityTooLarge(size, bucketName, objectName)
+	}
+
+	// Create a new pipe to stage the reads.
+	reader, writer := io.Pipe()
+
+	// readAtOffset to carry future offsets.
+	var readAtOffset int64
+
+	// readAt defaults to reading at 5MiB buffer.
+	readAtBuffer := make([]byte, 1024*1024*5)
+
+	// Initiate a routine to start writing.
+	go func() {
+		for {
+			readAtSize, rerr := data.ReadAt(readAtBuffer, readAtOffset)
+			if rerr != nil {
+				if rerr != io.EOF {
+					writer.CloseWithError(rerr)
+					return
+				}
+			}
+			writeSize, werr := writer.Write(readAtBuffer[:readAtSize])
+			if werr != nil {
+				writer.CloseWithError(werr)
+				return
+			}
+			if readAtSize != writeSize {
+				writer.CloseWithError(errors.New("Something really bad happened here. " + reportIssue))
+				return
+			}
+			readAtOffset += int64(writeSize)
+			if rerr == io.EOF {
+				writer.Close()
+				return
+			}
+		}
+	}()
+	// For anonymous requests, we will not calculate sha256 and md5sum.
+	putObjData := putObjectData{
+		MD5Sum:      nil,
+		Sha256Sum:   nil,
+		ReadCloser:  reader,
+		Size:        size,
+		ContentType: contentType,
+	}
+	// Execute put object.
+	st, err := c.putObject(bucketName, objectName, putObjData)
+	if err != nil {
+		return 0, err
+	}
+	if st.Size != size {
+		return 0, ErrUnexpectedEOF(st.Size, size, bucketName, objectName)
+	}
+	return size, nil
+}
+
+// putAnonymousPartial is a special function for uploading content as anonymous request.
+// This special function is necessary since Amazon S3 doesn't allow anonymous multipart uploads.
+func (c Client) putPartialAnonymous(bucketName, objectName string, data ReadAtCloser, size int64, contentType string) (n int64, err error) {
+	// Input validation.
+	if err := isValidBucketName(bucketName); err != nil {
+		return 0, err
+	}
+	if err := isValidObjectName(objectName); err != nil {
+		return 0, err
+	}
+	return c.putPartialNoChksum(bucketName, objectName, data, size, contentType)
+}
+
+// putSmallObjectPartial uploads files smaller than 5MiB.
+func (c Client) putPartialSmallObject(bucketName, objectName string, data ReadAtCloser, size int64, contentType string) (n int64, err error) {
+	// Input validation.
+	if err := isValidBucketName(bucketName); err != nil {
+		return 0, err
+	}
+	if err := isValidObjectName(objectName); err != nil {
+		return 0, err
+	}
+
+	// readAt defaults to reading at 5MiB buffer.
+	readAtBuffer := make([]byte, size)
+	readAtSize, err := data.ReadAt(readAtBuffer, 0)
+	if err != nil {
+		if err != io.EOF {
+			return 0, err
+		}
+	}
+	if int64(readAtSize) != size {
+		return 0, ErrUnexpectedEOF(int64(readAtSize), size, bucketName, objectName)
+	}
+
+	// Construct a new PUT object metadata.
+	putObjData := putObjectData{
+		MD5Sum:      sumMD5(readAtBuffer),
+		Sha256Sum:   sum256(readAtBuffer),
+		ReadCloser:  ioutil.NopCloser(bytes.NewReader(readAtBuffer)),
+		Size:        size,
+		ContentType: contentType,
+	}
+	// Single part use case, use putObject directly.
+	st, err := c.putObject(bucketName, objectName, putObjData)
+	if err != nil {
+		return 0, err
+	}
+	if st.Size != size {
+		return 0, ErrUnexpectedEOF(st.Size, size, bucketName, objectName)
+	}
+	return size, nil
+}
+
+// putPartialLargeObject uploads files bigger than 5MiB.
+func (c Client) putPartialLargeObject(bucketName, objectName string, data ReadAtCloser, size int64, contentType string) (n int64, err error) {
+	// Input validation.
+	if err := isValidBucketName(bucketName); err != nil {
+		return 0, err
+	}
+	if err := isValidObjectName(objectName); err != nil {
+		return 0, err
+	}
 
 	// getUploadID for an object, initiates a new multipart request
 	// if it cannot find any previously partially uploaded object.
@@ -139,7 +320,7 @@ func (c Client) PutObjectPartial(bucketName, objectName string, data ReadAtClose
 		}
 
 		// Save all the part metadata.
-		partMdata := partMetadata{
+		prtData := partData{
 			ReadCloser: tmpFile,
 			MD5Sum:     hashMD5.Sum(nil),
 			Size:       totalReadPartSize,
@@ -147,25 +328,25 @@ func (c Client) PutObjectPartial(bucketName, objectName string, data ReadAtClose
 
 		// Signature version '4'.
 		if c.signature.isV4() {
-			partMdata.Sha256Sum = hashSha256.Sum(nil)
+			prtData.Sha256Sum = hashSha256.Sum(nil)
 		}
 
 		// Current part number to be uploaded.
-		partMdata.Number = partNumber
+		prtData.Number = partNumber
 
 		// execute upload part.
-		objPart, err := c.uploadPart(bucketName, objectName, uploadID, partMdata)
+		objPart, err := c.uploadPart(bucketName, objectName, uploadID, prtData)
 		if err != nil {
 			// Close the read closer.
-			partMdata.ReadCloser.Close()
+			prtData.ReadCloser.Close()
 			return totalUploadedSize, err
 		}
 
 		// Save successfully uploaded size.
-		totalUploadedSize += partMdata.Size
+		totalUploadedSize += prtData.Size
 
 		// Save successfully uploaded part metadata.
-		partsInfo[partMdata.Number] = objPart
+		partsInfo[prtData.Number] = objPart
 
 		// Move to next part.
 		partNumber++

Godeps/_workspace/src/github.com/minio/minio-go/api-put-object.go

@@ -50,8 +50,8 @@ func (a completedParts) Less(i, j int) bool { return a[i].PartNumber < a[j].Part
 //  - For size input as -1 PutObject does a multipart Put operation until input stream reaches EOF.
 //    Maximum object size that can be uploaded through this operation will be 5TiB.
 //
-// NOTE: Google Cloud Storage multipart Put is not compatible with Amazon S3 APIs.
+// NOTE: Google Cloud Storage does not implement Amazon S3 Compatible multipart PUT.
-// Current implementation will only upload a maximum of 5GiB to Google Cloud Storage servers.
+// So we fall back to single PUT operation with the maximum limit of 5GiB.
 //
 // NOTE: For anonymous requests Amazon S3 doesn't allow multipart upload. So we fall back to single PUT operation.
 func (c Client) PutObject(bucketName, objectName string, data io.Reader, size int64, contentType string) (n int64, err error) {
@@ -63,8 +63,8 @@ func (c Client) PutObject(bucketName, objectName string, data io.Reader, size in
 		return 0, err
 	}
 
-	// NOTE: Google Cloud Storage multipart Put is not compatible with Amazon S3 APIs.
+	// NOTE: Google Cloud Storage does not implement Amazon S3 Compatible multipart PUT.
-	// Current implementation will only upload a maximum of 5GiB to Google Cloud Storage servers.
+	// So we fall back to single PUT operation with the maximum limit of 5GiB.
 	if isGoogleEndpoint(c.endpointURL) {
 		if size <= -1 {
 			return 0, ErrorResponse{
@@ -114,7 +114,7 @@ func (c Client) putNoChecksum(bucketName, objectName string, data io.Reader, siz
 		return 0, ErrEntityTooLarge(size, bucketName, objectName)
 	}
 	// For anonymous requests, we will not calculate sha256 and md5sum.
-	putObjMetadata := putObjectMetadata{
+	putObjData := putObjectData{
 		MD5Sum:      nil,
 		Sha256Sum:   nil,
 		ReadCloser:  ioutil.NopCloser(data),
@@ -122,9 +122,13 @@ func (c Client) putNoChecksum(bucketName, objectName string, data io.Reader, siz
 		ContentType: contentType,
 	}
 	// Execute put object.
-	if _, err := c.putObject(bucketName, objectName, putObjMetadata); err != nil {
+	st, err := c.putObject(bucketName, objectName, putObjData)
+	if err != nil {
 		return 0, err
 	}
+	if st.Size != size {
+		return 0, ErrUnexpectedEOF(st.Size, size, bucketName, objectName)
+	}
 	return size, nil
 }
 
@@ -160,7 +164,7 @@ func (c Client) putSmallObject(bucketName, objectName string, data io.Reader, si
 		return 0, ErrUnexpectedEOF(int64(len(dataBytes)), size, bucketName, objectName)
 	}
 	// Construct a new PUT object metadata.
-	putObjMetadata := putObjectMetadata{
+	putObjData := putObjectData{
 		MD5Sum:      sumMD5(dataBytes),
 		Sha256Sum:   sum256(dataBytes),
 		ReadCloser:  ioutil.NopCloser(bytes.NewReader(dataBytes)),
@@ -168,9 +172,13 @@ func (c Client) putSmallObject(bucketName, objectName string, data io.Reader, si
 		ContentType: contentType,
 	}
 	// Single part use case, use putObject directly.
-	if _, err := c.putObject(bucketName, objectName, putObjMetadata); err != nil {
+	st, err := c.putObject(bucketName, objectName, putObjData)
+	if err != nil {
 		return 0, err
 	}
+	if st.Size != size {
+		return 0, ErrUnexpectedEOF(st.Size, size, bucketName, objectName)
+	}
 	return size, nil
 }
 
@@ -189,12 +197,13 @@ func (c Client) hashCopy(writer io.ReadWriteSeeker, data io.Reader, partSize int
 	// Copies to input at writer.
 	size, err = io.CopyN(hashWriter, data, partSize)
 	if err != nil {
+		// If not EOF return error right here.
 		if err != io.EOF {
 			return nil, nil, 0, err
 		}
 	}
 
-	// Seek back to beginning of input.
+	// Seek back to beginning of input, any error fail right here.
 	if _, err := writer.Seek(0, 0); err != nil {
 		return nil, nil, 0, err
 	}
@@ -204,7 +213,7 @@ func (c Client) hashCopy(writer io.ReadWriteSeeker, data io.Reader, partSize int
 	if c.signature.isV4() {
 		sha256Sum = hashSha256.Sum(nil)
 	}
-	return md5Sum, sha256Sum, size, nil
+	return md5Sum, sha256Sum, size, err
 }
 
 // putLargeObject uploads files bigger than 5 mega bytes.
@@ -217,9 +226,6 @@ func (c Client) putLargeObject(bucketName, objectName string, data io.Reader, si
 		return 0, err
 	}
 
-	// Cleanup any previously left stale files, as the function exits.
-	defer cleanupStaleTempfiles("multiparts$-putobject")
-
 	// getUploadID for an object, initiates a new multipart request
 	// if it cannot find any previously partially uploaded object.
 	uploadID, err := c.getUploadID(bucketName, objectName, contentType)
@@ -242,7 +248,6 @@ func (c Client) putLargeObject(bucketName, objectName string, data io.Reader, si
 	var prevMaxPartSize int64
 	// Loop through all parts and calculate totalUploadedSize.
 	for _, partInfo := range partsInfo {
-		totalUploadedSize += partInfo.Size
 		// Choose the maximum part size.
 		if partInfo.Size >= prevMaxPartSize {
 			prevMaxPartSize = partInfo.Size
@@ -256,15 +261,13 @@ func (c Client) putLargeObject(bucketName, objectName string, data io.Reader, si
 		partSize = prevMaxPartSize
 	}
 
-	// Part number always starts with '1'.
+	// Part number always starts with '0'.
-	partNumber := 1
+	partNumber := 0
 
 	// Loop through until EOF.
 	for {
-		// We have reached EOF, break out.
+		// Increment part number.
-		if totalUploadedSize == size {
+		partNumber++
-			break
-		}
 
 		// Initialize a new temporary file.
 		tmpFile, err := newTempFile("multiparts$-putobject")
@@ -273,15 +276,15 @@ func (c Client) putLargeObject(bucketName, objectName string, data io.Reader, si
 		}
 
 		// Calculates MD5 and Sha256 sum while copying partSize bytes into tmpFile.
-		md5Sum, sha256Sum, size, err := c.hashCopy(tmpFile, data, partSize)
+		md5Sum, sha256Sum, size, rErr := c.hashCopy(tmpFile, data, partSize)
-		if err != nil {
+		if rErr != nil {
-			if err != io.EOF {
+			if rErr != io.EOF {
-				return 0, err
+				return 0, rErr
 			}
 		}
 
 		// Save all the part metadata.
-		partMdata := partMetadata{
+		prtData := partData{
 			ReadCloser: tmpFile,
 			Size:       size,
 			MD5Sum:     md5Sum,
@@ -289,39 +292,28 @@ func (c Client) putLargeObject(bucketName, objectName string, data io.Reader, si
 			Number:     partNumber, // Current part number to be uploaded.
 		}
 
-		// If part number already uploaded, move to the next one.
+		// If part not uploaded proceed to upload.
-		if isPartUploaded(objectPart{
+		if !isPartUploaded(objectPart{
-			ETag:       hex.EncodeToString(partMdata.MD5Sum),
+			ETag:       hex.EncodeToString(prtData.MD5Sum),
 			PartNumber: partNumber,
 		}, partsInfo) {
-			// Close the read closer.
-			partMdata.ReadCloser.Close()
-			continue
-		}
-
 			// execute upload part.
-		objPart, err := c.uploadPart(bucketName, objectName, uploadID, partMdata)
+			objPart, err := c.uploadPart(bucketName, objectName, uploadID, prtData)
 			if err != nil {
 				// Close the read closer.
-			partMdata.ReadCloser.Close()
+				prtData.ReadCloser.Close()
-			return totalUploadedSize, err
+				return 0, err
 			}
-
-		// Save successfully uploaded size.
-		totalUploadedSize += partMdata.Size
-
 			// Save successfully uploaded part metadata.
-		partsInfo[partMdata.Number] = objPart
+			partsInfo[prtData.Number] = objPart
-
-		// Move to next part.
-		partNumber++
 		}
 
-	// If size is greater than zero verify totalWritten.
+		// Close the read closer.
-	// if totalWritten is different than the input 'size', do not complete the request throw an error.
+		prtData.ReadCloser.Close()
-	if size > 0 {
+
-		if totalUploadedSize != size {
+		// If read error was an EOF, break out of the loop.
-			return totalUploadedSize, ErrUnexpectedEOF(totalUploadedSize, size, bucketName, objectName)
+		if rErr == io.EOF {
+			break
 		}
 	}
 
@@ -331,6 +323,21 @@ func (c Client) putLargeObject(bucketName, objectName string, data io.Reader, si
 		complPart.ETag = part.ETag
 		complPart.PartNumber = part.PartNumber
 		completeMultipartUpload.Parts = append(completeMultipartUpload.Parts, complPart)
+		// Save successfully uploaded size.
+		totalUploadedSize += part.Size
+	}
+
+	// If size is greater than zero verify totalUploadedSize. if totalUploadedSize is
+	// different than the input 'size', do not complete the request throw an error.
+	if size > 0 {
+		if totalUploadedSize != size {
+			return totalUploadedSize, ErrUnexpectedEOF(totalUploadedSize, size, bucketName, objectName)
+		}
+	}
+
+	// If partNumber is different than total list of parts, error out.
+	if partNumber != len(completeMultipartUpload.Parts) {
+		return totalUploadedSize, ErrInvalidParts(partNumber, len(completeMultipartUpload.Parts))
 	}
 
 	// Sort all completed parts.
@@ -346,7 +353,7 @@ func (c Client) putLargeObject(bucketName, objectName string, data io.Reader, si
 
 // putObject - add an object to a bucket.
 // NOTE: You must have WRITE permissions on a bucket to add an object to it.
-func (c Client) putObject(bucketName, objectName string, putObjMetadata putObjectMetadata) (ObjectStat, error) {
+func (c Client) putObject(bucketName, objectName string, putObjData putObjectData) (ObjectStat, error) {
 	// Input validation.
 	if err := isValidBucketName(bucketName); err != nil {
 		return ObjectStat{}, err
@@ -355,23 +362,23 @@ func (c Client) putObject(bucketName, objectName string, putObjMetadata putObjec
 		return ObjectStat{}, err
 	}
 
-	if strings.TrimSpace(putObjMetadata.ContentType) == "" {
+	if strings.TrimSpace(putObjData.ContentType) == "" {
-		putObjMetadata.ContentType = "application/octet-stream"
+		putObjData.ContentType = "application/octet-stream"
 	}
 
 	// Set headers.
 	customHeader := make(http.Header)
-	customHeader.Set("Content-Type", putObjMetadata.ContentType)
+	customHeader.Set("Content-Type", putObjData.ContentType)
 
 	// Populate request metadata.
 	reqMetadata := requestMetadata{
 		bucketName:         bucketName,
 		objectName:         objectName,
 		customHeader:       customHeader,
-		contentBody:        putObjMetadata.ReadCloser,
+		contentBody:        putObjData.ReadCloser,
-		contentLength:      putObjMetadata.Size,
+		contentLength:      putObjData.Size,
-		contentSha256Bytes: putObjMetadata.Sha256Sum,
+		contentSha256Bytes: putObjData.Sha256Sum,
-		contentMD5Bytes:    putObjMetadata.MD5Sum,
+		contentMD5Bytes:    putObjData.MD5Sum,
 	}
 	// Initiate new request.
 	req, err := c.newRequest("PUT", reqMetadata)
@@ -389,11 +396,15 @@ func (c Client) putObject(bucketName, objectName string, putObjMetadata putObjec
 			return ObjectStat{}, HTTPRespToErrorResponse(resp, bucketName, objectName)
 		}
 	}
+
 	var metadata ObjectStat
-	// Trim off the odd double quotes from ETag.
+	// Trim off the odd double quotes from ETag in the beginning and end.
-	metadata.ETag = strings.Trim(resp.Header.Get("ETag"), "\"")
+	metadata.ETag = strings.TrimPrefix(resp.Header.Get("ETag"), "\"")
+	metadata.ETag = strings.TrimSuffix(metadata.ETag, "\"")
 	// A success here means data was written to server successfully.
-	metadata.Size = putObjMetadata.Size
+	metadata.Size = putObjData.Size
+
+	// Return here.
 	return metadata, nil
 }
 
@@ -452,7 +463,7 @@ func (c Client) initiateMultipartUpload(bucketName, objectName, contentType stri
 }
 
 // uploadPart uploads a part in a multipart upload.
-func (c Client) uploadPart(bucketName, objectName, uploadID string, uploadingPart partMetadata) (objectPart, error) {
+func (c Client) uploadPart(bucketName, objectName, uploadID string, uploadingPart partData) (objectPart, error) {
 	// Input validation.
 	if err := isValidBucketName(bucketName); err != nil {
 		return objectPart{}, err
@@ -496,8 +507,11 @@ func (c Client) uploadPart(bucketName, objectName, uploadID string, uploadingPar
 	}
 	// Once successfully uploaded, return completed part.
 	objPart := objectPart{}
+	objPart.Size = uploadingPart.Size
 	objPart.PartNumber = uploadingPart.Number
-	objPart.ETag = resp.Header.Get("ETag")
+	// Trim off the odd double quotes from ETag in the beginning and end.
+	objPart.ETag = strings.TrimPrefix(resp.Header.Get("ETag"), "\"")
+	objPart.ETag = strings.TrimSuffix(objPart.ETag, "\"")
 	return objPart, nil
 }
 

Godeps/_workspace/src/github.com/minio/minio-go/api-s3-definitions.go

@@ -103,9 +103,6 @@ type objectPart struct {
 
 	// Size of the uploaded part data.
 	Size int64
-
-	// Error
-	Err error
 }
 
 // listObjectPartsResult container for ListObjectParts response.

Godeps/_workspace/src/github.com/minio/minio-go/api-stat.go

@@ -73,7 +73,12 @@ func (c Client) StatObject(bucketName, objectName string) (ObjectStat, error) {
 			return ObjectStat{}, HTTPRespToErrorResponse(resp, bucketName, objectName)
 		}
 	}
-	md5sum := strings.Trim(resp.Header.Get("ETag"), "\"") // trim off the odd double quotes
+
+	// Trim off the odd double quotes from ETag in the beginning and end.
+	md5sum := strings.TrimPrefix(resp.Header.Get("ETag"), "\"")
+	md5sum = strings.TrimSuffix(md5sum, "\"")
+
+	// Parse content length.
 	size, err := strconv.ParseInt(resp.Header.Get("Content-Length"), 10, 64)
 	if err != nil {
 		return ObjectStat{}, ErrorResponse{

Godeps/_workspace/src/github.com/minio/minio-go/api_functional_test.go

@@ -54,6 +54,142 @@ func randString(n int, src rand.Source) string {
 	return string(b[0:30])
 }
 
+func TestResumableFPutObject(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping resumable tests with short runs")
+	}
+
+	// Seed random based on current time.
+	rand.Seed(time.Now().Unix())
+
+	// Connect and make sure bucket exists.
+	c, err := minio.New(
+		"play.minio.io:9002",
+		"Q3AM3UQ867SPQQA43P2F",
+		"zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG",
+		false,
+	)
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
+
+	// Set user agent.
+	c.SetAppInfo("Minio-go-FunctionalTest", "0.1.0")
+
+	// Enable tracing, write to stdout.
+	// c.TraceOn(nil)
+
+	// Generate a new random bucket name.
+	bucketName := randString(60, rand.NewSource(time.Now().UnixNano()))
+
+	// make a new bucket.
+	err = c.MakeBucket(bucketName, "private", "us-east-1")
+	if err != nil {
+		t.Fatal("Error:", err, bucketName)
+	}
+
+	file, err := ioutil.TempFile(os.TempDir(), "resumable")
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
+
+	n, _ := io.CopyN(file, crand.Reader, 11*1024*1024)
+	if n != int64(11*1024*1024) {
+		t.Fatalf("Error: number of bytes does not match, want %v, got %v\n", 11*1024*1024, n)
+	}
+
+	objectName := bucketName + "-resumable"
+
+	n, err = c.FPutObject(bucketName, objectName, file.Name(), "application/octet-stream")
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
+	if n != int64(11*1024*1024) {
+		t.Fatalf("Error: number of bytes does not match, want %v, got %v\n", 11*1024*1024, n)
+	}
+
+	// Close the file pro-actively for windows.
+	file.Close()
+
+	err = c.RemoveObject(bucketName, objectName)
+	if err != nil {
+		t.Fatal("Error: ", err)
+	}
+
+	err = c.RemoveBucket(bucketName)
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
+
+	err = os.Remove(file.Name())
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
+}
+
+func TestResumablePutObject(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping resumable tests with short runs")
+	}
+
+	// Seed random based on current time.
+	rand.Seed(time.Now().Unix())
+
+	// Connect and make sure bucket exists.
+	c, err := minio.New(
+		"play.minio.io:9002",
+		"Q3AM3UQ867SPQQA43P2F",
+		"zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG",
+		false,
+	)
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
+
+	// Set user agent.
+	c.SetAppInfo("Minio-go-FunctionalTest", "0.1.0")
+
+	// Enable tracing, write to stdout.
+	// c.TraceOn(nil)
+
+	// Generate a new random bucket name.
+	bucketName := randString(60, rand.NewSource(time.Now().UnixNano()))
+
+	// make a new bucket.
+	err = c.MakeBucket(bucketName, "private", "us-east-1")
+	if err != nil {
+		t.Fatal("Error:", err, bucketName)
+	}
+
+	// generate 11MB
+	buf := make([]byte, 11*1024*1024)
+
+	_, err = io.ReadFull(crand.Reader, buf)
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
+
+	objectName := bucketName + "-resumable"
+	reader := bytes.NewReader(buf)
+	n, err := c.PutObject(bucketName, objectName, reader, int64(reader.Len()), "application/octet-stream")
+	if err != nil {
+		t.Fatal("Error:", err, bucketName, objectName)
+	}
+	if n != int64(len(buf)) {
+		t.Fatalf("Error: number of bytes does not match, want %v, got %v\n", len(buf), n)
+	}
+
+	err = c.RemoveObject(bucketName, objectName)
+	if err != nil {
+		t.Fatal("Error: ", err)
+	}
+
+	err = c.RemoveBucket(bucketName)
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
+}
+
 func TestGetObjectPartialFunctional(t *testing.T) {
 	// Seed random based on current time.
 	rand.Seed(time.Now().Unix())
@@ -177,6 +313,14 @@ func TestGetObjectPartialFunctional(t *testing.T) {
 			t.Fatal("Error:", err, len(buf6))
 		}
 	}
+	err = c.RemoveObject(bucketName, objectName)
+	if err != nil {
+		t.Fatal("Error: ", err)
+	}
+	err = c.RemoveBucket(bucketName)
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
 }
 
 func TestFunctional(t *testing.T) {
@@ -271,14 +415,26 @@ func TestFunctional(t *testing.T) {
 
 	// generate data
 	buf := make([]byte, rand.Intn(1<<19))
-	reader := bytes.NewReader(buf)
+	_, err = io.ReadFull(crand.Reader, buf)
+	if err != nil {
+		t.Fatal("Error: ", err)
+	}
 
-	n, err := c.PutObject(bucketName, objectName, reader, int64(reader.Len()), "")
+	n, err := c.PutObject(bucketName, objectName, bytes.NewReader(buf), int64(len(buf)), "")
 	if err != nil {
 		t.Fatal("Error: ", err)
 	}
 	if n != int64(len(buf)) {
-		t.Fatal("Error: bad length ", n, reader.Len())
+		t.Fatal("Error: bad length ", n, len(buf))
+	}
+
+	n, err = c.PutObject(bucketName, objectName+"-nolength", bytes.NewReader(buf), -1, "binary/octet-stream")
+	if err != nil {
+		t.Fatal("Error:", err, bucketName, objectName+"-nolength")
+	}
+
+	if n != int64(len(buf)) {
+		t.Fatalf("Error: number of bytes does not match, want %v, got %v\n", len(buf), n)
 	}
 
 	newReader, _, err := c.GetObject(bucketName, objectName)
@@ -333,6 +489,10 @@ func TestFunctional(t *testing.T) {
 		t.Fatal("Error: ", err)
 	}
 	buf = make([]byte, rand.Intn(1<<20))
+	_, err = io.ReadFull(crand.Reader, buf)
+	if err != nil {
+		t.Fatal("Error: ", err)
+	}
 	req, err := http.NewRequest("PUT", presignedPutURL, bytes.NewReader(buf))
 	if err != nil {
 		t.Fatal("Error: ", err)
@@ -365,25 +525,25 @@ func TestFunctional(t *testing.T) {
 	if err != nil {
 		t.Fatal("Error: ", err)
 	}
+	err = c.RemoveObject(bucketName, objectName+"-nolength")
+	if err != nil {
+		t.Fatal("Error: ", err)
+	}
 	err = c.RemoveObject(bucketName, objectName+"-presigned")
 	if err != nil {
 		t.Fatal("Error: ", err)
 	}
-
 	err = c.RemoveBucket(bucketName)
 	if err != nil {
 		t.Fatal("Error:", err)
 	}
-
 	err = c.RemoveBucket("bucket1")
 	if err == nil {
 		t.Fatal("Error:")
 	}
-
 	if err.Error() != "The specified bucket does not exist." {
 		t.Fatal("Error: ", err)
 	}
-
 	if err = os.Remove(fileName); err != nil {
 		t.Fatal("Error: ", err)
 	}

Godeps/_workspace/src/github.com/minio/minio-go/appveyor.yml

@@ -27,7 +27,7 @@ build_script:
   - golint github.com/minio/minio-go...
   - deadcode
   - go test
-  - go test -race
+  - go test -test.short -race
 
 # to disable automatic tests
 test: off

Godeps/_workspace/src/github.com/minio/minio-go/tempfile.go

@@ -19,7 +19,6 @@ package minio
 import (
 	"io/ioutil"
 	"os"
-	"path/filepath"
 	"sync"
 )
 
@@ -42,21 +41,6 @@ func newTempFile(prefix string) (*tempFile, error) {
 	}, nil
 }
 
-// cleanupStaleTempFiles - cleanup any stale files present in temp directory at a prefix.
-func cleanupStaleTempfiles(prefix string) error {
-	globPath := filepath.Join(os.TempDir(), prefix) + "*"
-	staleFiles, err := filepath.Glob(globPath)
-	if err != nil {
-		return err
-	}
-	for _, staleFile := range staleFiles {
-		if err := os.Remove(staleFile); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
 // Close - closer wrapper to close and remove temporary file.
 func (t *tempFile) Close() error {
 	t.mutex.Lock()