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Copy pathapi-headers.go
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133 lines (115 loc) · 3.51 KB
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/*
* Minio Cloud Storage, (C) 2015, 2016, 2017 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 cmd
import (
"bytes"
"encoding/json"
"encoding/xml"
"fmt"
"net/http"
"strconv"
"time"
"github.com/minio/minio/cmd/crypto"
)
// Returns a hexadecimal representation of time at the
// time response is sent to the client.
func mustGetRequestID(t time.Time) string {
return fmt.Sprintf("%X", t.UnixNano())
}
// Write http common headers
func setCommonHeaders(w http.ResponseWriter) {
w.Header().Set("Server", "Minio/"+ReleaseTag)
// Set `x-amz-bucket-region` only if region is set on the server
// by default minio uses an empty region.
if region := globalServerConfig.GetRegion(); region != "" {
w.Header().Set("X-Amz-Bucket-Region", region)
}
w.Header().Set("Accept-Ranges", "bytes")
// Remove sensitive information
crypto.RemoveSensitiveHeaders(w.Header())
}
// Encodes the response headers into XML format.
func encodeResponse(response interface{}) []byte {
var bytesBuffer bytes.Buffer
bytesBuffer.WriteString(xml.Header)
e := xml.NewEncoder(&bytesBuffer)
e.Encode(response)
return bytesBuffer.Bytes()
}
// Encodes the response headers into JSON format.
func encodeResponseJSON(response interface{}) []byte {
var bytesBuffer bytes.Buffer
e := json.NewEncoder(&bytesBuffer)
e.Encode(response)
return bytesBuffer.Bytes()
}
// Write object header
func setObjectHeaders(w http.ResponseWriter, objInfo ObjectInfo, rs *HTTPRangeSpec) (err error) {
// set common headers
setCommonHeaders(w)
// Set last modified time.
lastModified := objInfo.ModTime.UTC().Format(http.TimeFormat)
w.Header().Set("Last-Modified", lastModified)
// Set Etag if available.
if objInfo.ETag != "" {
w.Header().Set("ETag", "\""+objInfo.ETag+"\"")
}
if objInfo.ContentType != "" {
w.Header().Set("Content-Type", objInfo.ContentType)
}
if objInfo.ContentEncoding != "" {
w.Header().Set("Content-Encoding", objInfo.ContentEncoding)
}
if !objInfo.Expires.IsZero() {
w.Header().Set("Expires", objInfo.Expires.UTC().Format(http.TimeFormat))
}
// Set all other user defined metadata.
for k, v := range objInfo.UserDefined {
if hasPrefix(k, ReservedMetadataPrefix) {
// Do not need to send any internal metadata
// values to client.
continue
}
w.Header().Set(k, v)
}
var totalObjectSize int64
switch {
case crypto.IsEncrypted(objInfo.UserDefined):
totalObjectSize, err = objInfo.DecryptedSize()
if err != nil {
return err
}
case objInfo.IsCompressed():
totalObjectSize = objInfo.GetActualSize()
if totalObjectSize < 0 {
return errInvalidDecompressedSize
}
default:
totalObjectSize = objInfo.Size
}
// for providing ranged content
start, rangeLen, err := rs.GetOffsetLength(totalObjectSize)
if err != nil {
return err
}
// Set content length.
w.Header().Set("Content-Length", strconv.FormatInt(rangeLen, 10))
if rs != nil {
contentRange := fmt.Sprintf("bytes %d-%d/%d", start, start+rangeLen-1, totalObjectSize)
w.Header().Set("Content-Range", contentRange)
}
return nil
}