mirror of https://github.com/minio/minio.git
136 lines
3.6 KiB
Go
136 lines
3.6 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2015, 2016, 2017 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"bytes"
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"encoding/json"
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"encoding/xml"
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"fmt"
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"net/http"
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"strconv"
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"time"
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"github.com/minio/minio/cmd/crypto"
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xhttp "github.com/minio/minio/cmd/http"
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)
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// Returns a hexadecimal representation of time at the
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// time response is sent to the client.
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func mustGetRequestID(t time.Time) string {
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return fmt.Sprintf("%X", t.UnixNano())
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}
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// Write http common headers
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func setCommonHeaders(w http.ResponseWriter) {
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w.Header().Set(xhttp.ServerInfo, "MinIO/"+ReleaseTag)
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// Set `x-amz-bucket-region` only if region is set on the server
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// by default minio uses an empty region.
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if region := globalServerConfig.GetRegion(); region != "" {
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w.Header().Set(xhttp.AmzBucketRegion, region)
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}
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w.Header().Set(xhttp.AcceptRanges, "bytes")
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// Remove sensitive information
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crypto.RemoveSensitiveHeaders(w.Header())
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}
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// Encodes the response headers into XML format.
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func encodeResponse(response interface{}) []byte {
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var bytesBuffer bytes.Buffer
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bytesBuffer.WriteString(xml.Header)
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e := xml.NewEncoder(&bytesBuffer)
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e.Encode(response)
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return bytesBuffer.Bytes()
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}
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// Encodes the response headers into JSON format.
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func encodeResponseJSON(response interface{}) []byte {
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var bytesBuffer bytes.Buffer
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e := json.NewEncoder(&bytesBuffer)
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e.Encode(response)
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return bytesBuffer.Bytes()
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}
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// Write object header
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func setObjectHeaders(w http.ResponseWriter, objInfo ObjectInfo, rs *HTTPRangeSpec) (err error) {
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// set common headers
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setCommonHeaders(w)
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// Set last modified time.
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lastModified := objInfo.ModTime.UTC().Format(http.TimeFormat)
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w.Header().Set(xhttp.LastModified, lastModified)
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// Set Etag if available.
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if objInfo.ETag != "" {
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w.Header()[xhttp.ETag] = []string{"\"" + objInfo.ETag + "\""}
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}
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if objInfo.ContentType != "" {
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w.Header().Set(xhttp.ContentType, objInfo.ContentType)
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}
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if objInfo.ContentEncoding != "" {
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w.Header().Set(xhttp.ContentEncoding, objInfo.ContentEncoding)
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}
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if !objInfo.Expires.IsZero() {
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w.Header().Set(xhttp.Expires, objInfo.Expires.UTC().Format(http.TimeFormat))
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}
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// Set all other user defined metadata.
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for k, v := range objInfo.UserDefined {
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if hasPrefix(k, ReservedMetadataPrefix) {
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// Do not need to send any internal metadata
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// values to client.
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continue
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}
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w.Header().Set(k, v)
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}
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var totalObjectSize int64
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switch {
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case crypto.IsEncrypted(objInfo.UserDefined):
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totalObjectSize, err = objInfo.DecryptedSize()
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if err != nil {
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return err
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}
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case objInfo.IsCompressed():
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totalObjectSize = objInfo.GetActualSize()
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if totalObjectSize < 0 {
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return errInvalidDecompressedSize
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}
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default:
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totalObjectSize = objInfo.Size
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}
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// for providing ranged content
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start, rangeLen, err := rs.GetOffsetLength(totalObjectSize)
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if err != nil {
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return err
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}
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// Set content length.
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w.Header().Set(xhttp.ContentLength, strconv.FormatInt(rangeLen, 10))
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if rs != nil {
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contentRange := fmt.Sprintf("bytes %d-%d/%d", start, start+rangeLen-1, totalObjectSize)
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w.Header().Set(xhttp.ContentRange, contentRange)
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}
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return nil
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}
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