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Copy pathapi-headers.go
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107 lines (93 loc) · 3.05 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"
)
// 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) {
// Set unique request ID for each reply.
w.Header().Set(responseRequestIDKey, mustGetRequestID(UTCNow()))
w.Header().Set("Server", globalServerUserAgent)
// 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")
}
// 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, contentRange *httpRange) {
// set common headers
setCommonHeaders(w)
// Set content length.
w.Header().Set("Content-Length", strconv.FormatInt(objInfo.Size, 10))
// 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)
}
// 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)
}
// for providing ranged content
if contentRange != nil && contentRange.offsetBegin > -1 {
// Override content-length
w.Header().Set("Content-Length", strconv.FormatInt(contentRange.getLength(), 10))
w.Header().Set("Content-Range", contentRange.String())
w.WriteHeader(http.StatusPartialContent)
}
}