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Copy pathapi-headers.go
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85 lines (73 loc) · 2.49 KB
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/*
* Minio Cloud Storage, (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 (
"bytes"
"crypto/rand"
"encoding/xml"
"net/http"
"runtime"
"strconv"
)
//// helpers
// Static alphaNumeric table used for generating unique request ids
var alphaNumericTable = []byte("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ")
// generateRequestID - Generate request id
func generateRequestID() []byte {
alpha := make([]byte, 16)
rand.Read(alpha)
for i := 0; i < 16; i++ {
alpha[i] = alphaNumericTable[alpha[i]%byte(len(alphaNumericTable))]
}
return alpha
}
// Write http common headers
func setCommonHeaders(w http.ResponseWriter) {
// Set unique request ID for each reply.
w.Header().Set("X-Amz-Request-Id", string(generateRequestID()))
w.Header().Set("Server", ("Minio/" + minioReleaseTag + " (" + runtime.GOOS + "; " + runtime.GOARCH + ")"))
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()
}
// Write object header
func setObjectHeaders(w http.ResponseWriter, objInfo ObjectInfo, contentRange *httpRange) {
// set common headers
setCommonHeaders(w)
// set object-related metadata headers
lastModified := objInfo.ModTime.UTC().Format(http.TimeFormat)
w.Header().Set("Last-Modified", lastModified)
w.Header().Set("Content-Type", objInfo.ContentType)
if objInfo.MD5Sum != "" {
w.Header().Set("ETag", "\""+objInfo.MD5Sum+"\"")
}
w.Header().Set("Content-Length", strconv.FormatInt(objInfo.Size, 10))
// for providing ranged content
if contentRange != nil {
if contentRange.start > 0 || contentRange.length > 0 {
// override content-length
w.Header().Set("Content-Length", strconv.FormatInt(contentRange.length, 10))
w.Header().Set("Content-Range", contentRange.String())
w.WriteHeader(http.StatusPartialContent)
}
}
}