GetObject now replies with size and md5sum

api.go

@@ -23,6 +23,7 @@ import (
 	"io/ioutil"
 	"net/http"
 	"net/url"
+	"strings"
 )
 
 type api struct {
@@ -240,7 +241,7 @@ func (a *api) putObjectRequest(bucket, object string, size int64, body io.ReadSe
 	}
 	r.Set("Content-MD5", md5Sum)
 	r.req.ContentLength = size
-	return req, nil
+	return r, nil
 }
 
 // PutObject - add an object to a bucket
@@ -288,17 +289,18 @@ func (a *api) getObjectRequest(bucket, object string, offset, length uint64) (*R
 //
 // Additionally it also takes range arguments to download the specified range bytes of an object.
 // For more information about the HTTP Range header, go to http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.
-func (a *api) GetObject(bucket, object string, offset, length uint64) (io.ReadCloser, error) {
+func (a *api) GetObject(bucket, object string, offset, length uint64) (io.ReadCloser, int64, string, error) {
 	req, err := a.getObjectRequest(bucket, object, offset, length)
 	if err != nil {
-		return nil, err
+		return nil, 0, "", err
 	}
 	resp, err := req.Do()
 	if err != nil {
-		return nil, err
+		return nil, 0, "", err
 	}
+	md5sum := strings.Trim(resp.Header.Get("ETag"), "\"") // trim off the odd double quotes
 	// do not close body here, caller will close
-	return resp.Body, nil
+	return resp.Body, resp.ContentLength, md5sum, nil
 }
 
 // headObjectRequest wrapper creates a new HeadObject request

examples/play/get_object.go

@@ -0,0 +1,66 @@
+// +build ignore
+
+/*
+ * Minimal object storage library (C) 2015 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package main
+
+import (
+	"io"
+	"log"
+	"os"
+
+	"github.com/minio-io/objectstorage-go"
+)
+
+func main() {
+	config := new(objectstorage.Config)
+	config.Endpoint = "http://play.minio.io:9000"
+	config.AccessKeyID = ""
+	config.SecretAccessKey = ""
+	config.UserAgent = "Minio"
+	m := objectstorage.New(config)
+
+	err := m.PutBucket("testbucket")
+	if err != nil {
+		log.Println(err)
+	}
+
+	err = m.PutBucketACL("testbucket", "public-read")
+	if err != nil {
+		log.Println(err)
+	}
+
+	err = m.HeadBucket("testbucket")
+	if err != nil {
+		log.Println(err)
+	}
+
+	reader, size, _, err := m.GetObject("testbucket", "testfile", 0, 0)
+	if err != nil {
+		log.Println(err)
+	}
+	localfile, err := os.Create("newfile")
+	if err != nil {
+		log.Println(err)
+	}
+	defer localfile.Close()
+
+	_, err = io.CopyN(localfile, reader, size)
+	if err != nil {
+		log.Println(err)
+	}
+}

interface.go

@@ -41,7 +41,7 @@ type BucketInterface interface {
 type ObjectInterface interface {
 	/// Object Read/Write/Stat/Unlink Operations
 	PutObject(bucket, object string, size int64, body io.ReadSeeker) error
-	GetObject(bucket, object string, offset, length uint64) (io.ReadCloser, error)
+	GetObject(bucket, object string, offset, length uint64) (io.ReadCloser, int64, string, error)
 	HeadObject(bucket, object string) error
 	DeleteObject(bucket, object string) error
 }