mirror of https://github.com/minio/minio.git
90 lines
2.5 KiB
Go
90 lines
2.5 KiB
Go
/*
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* Minio Cloud Storage, (C) 2015 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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"crypto/rand"
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"encoding/xml"
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"net/http"
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"runtime"
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"strconv"
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)
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//// helpers
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// Static alphaNumeric table used for generating unique request ids
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var alphaNumericTable = []byte("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ")
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// generateRequestID - Generate request id
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func generateRequestID() []byte {
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alpha := make([]byte, 16)
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rand.Read(alpha)
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for i := 0; i < 16; i++ {
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alpha[i] = alphaNumericTable[alpha[i]%byte(len(alphaNumericTable))]
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}
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return alpha
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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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// Set unique request ID for each reply.
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w.Header().Set("X-Amz-Request-Id", string(generateRequestID()))
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w.Header().Set("Server", ("Minio/" + ReleaseTag + " (" + runtime.GOOS + "; " + runtime.GOARCH + ")"))
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w.Header().Set("Accept-Ranges", "bytes")
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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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// Write object header
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func setObjectHeaders(w http.ResponseWriter, objInfo ObjectInfo, contentRange *httpRange) {
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// set common headers
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setCommonHeaders(w)
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// Set content length.
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w.Header().Set("Content-Length", strconv.FormatInt(objInfo.Size, 10))
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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("Last-Modified", lastModified)
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// Set Etag if available.
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if objInfo.MD5Sum != "" {
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w.Header().Set("ETag", "\""+objInfo.MD5Sum+"\"")
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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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w.Header().Set(k, v)
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}
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// for providing ranged content
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if contentRange != nil && contentRange.offsetBegin > -1 {
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// Override content-length
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w.Header().Set("Content-Length", strconv.FormatInt(contentRange.getLength(), 10))
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w.Header().Set("Content-Range", contentRange.String())
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w.WriteHeader(http.StatusPartialContent)
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}
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}
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