mirror of
https://github.com/minio/minio.git
synced 2025-11-04 02:01:05 +01:00
264 lines
9.1 KiB
Go
264 lines
9.1 KiB
Go
/*
|
|
* Minio Cloud Storage, (C) 2016, 2017, 2018 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 (
|
|
"context"
|
|
"net"
|
|
"net/http"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/minio/minio/pkg/event"
|
|
"github.com/minio/minio/pkg/handlers"
|
|
)
|
|
|
|
// Validates the preconditions for CopyObjectPart, returns true if CopyObjectPart
|
|
// operation should not proceed. Preconditions supported are:
|
|
// x-amz-copy-source-if-modified-since
|
|
// x-amz-copy-source-if-unmodified-since
|
|
// x-amz-copy-source-if-match
|
|
// x-amz-copy-source-if-none-match
|
|
func checkCopyObjectPartPreconditions(w http.ResponseWriter, r *http.Request, objInfo ObjectInfo) bool {
|
|
return checkCopyObjectPreconditions(w, r, objInfo)
|
|
}
|
|
|
|
// Validates the preconditions for CopyObject, returns true if CopyObject operation should not proceed.
|
|
// Preconditions supported are:
|
|
// x-amz-copy-source-if-modified-since
|
|
// x-amz-copy-source-if-unmodified-since
|
|
// x-amz-copy-source-if-match
|
|
// x-amz-copy-source-if-none-match
|
|
func checkCopyObjectPreconditions(w http.ResponseWriter, r *http.Request, objInfo ObjectInfo) bool {
|
|
// Return false for methods other than GET and HEAD.
|
|
if r.Method != "PUT" {
|
|
return false
|
|
}
|
|
// If the object doesn't have a modtime (IsZero), or the modtime
|
|
// is obviously garbage (Unix time == 0), then ignore modtimes
|
|
// and don't process the If-Modified-Since header.
|
|
if objInfo.ModTime.IsZero() || objInfo.ModTime.Equal(time.Unix(0, 0)) {
|
|
return false
|
|
}
|
|
|
|
// Headers to be set of object content is not going to be written to the client.
|
|
writeHeaders := func() {
|
|
// set common headers
|
|
setCommonHeaders(w)
|
|
|
|
// set object-related metadata headers
|
|
w.Header().Set("Last-Modified", objInfo.ModTime.UTC().Format(http.TimeFormat))
|
|
|
|
if objInfo.ETag != "" {
|
|
w.Header().Set("ETag", "\""+objInfo.ETag+"\"")
|
|
}
|
|
}
|
|
// x-amz-copy-source-if-modified-since: Return the object only if it has been modified
|
|
// since the specified time otherwise return 412 (precondition failed).
|
|
ifModifiedSinceHeader := r.Header.Get("x-amz-copy-source-if-modified-since")
|
|
if ifModifiedSinceHeader != "" {
|
|
if givenTime, err := time.Parse(http.TimeFormat, ifModifiedSinceHeader); err == nil {
|
|
if !ifModifiedSince(objInfo.ModTime, givenTime) {
|
|
// If the object is not modified since the specified time.
|
|
writeHeaders()
|
|
writeErrorResponse(w, ErrPreconditionFailed, r.URL)
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
|
|
// x-amz-copy-source-if-unmodified-since : Return the object only if it has not been
|
|
// modified since the specified time, otherwise return a 412 (precondition failed).
|
|
ifUnmodifiedSinceHeader := r.Header.Get("x-amz-copy-source-if-unmodified-since")
|
|
if ifUnmodifiedSinceHeader != "" {
|
|
if givenTime, err := time.Parse(http.TimeFormat, ifUnmodifiedSinceHeader); err == nil {
|
|
if ifModifiedSince(objInfo.ModTime, givenTime) {
|
|
// If the object is modified since the specified time.
|
|
writeHeaders()
|
|
writeErrorResponse(w, ErrPreconditionFailed, r.URL)
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
|
|
// x-amz-copy-source-if-match : Return the object only if its entity tag (ETag) is the
|
|
// same as the one specified; otherwise return a 412 (precondition failed).
|
|
ifMatchETagHeader := r.Header.Get("x-amz-copy-source-if-match")
|
|
if ifMatchETagHeader != "" {
|
|
if objInfo.ETag != "" && !isETagEqual(objInfo.ETag, ifMatchETagHeader) {
|
|
// If the object ETag does not match with the specified ETag.
|
|
writeHeaders()
|
|
writeErrorResponse(w, ErrPreconditionFailed, r.URL)
|
|
return true
|
|
}
|
|
}
|
|
|
|
// If-None-Match : Return the object only if its entity tag (ETag) is different from the
|
|
// one specified otherwise, return a 304 (not modified).
|
|
ifNoneMatchETagHeader := r.Header.Get("x-amz-copy-source-if-none-match")
|
|
if ifNoneMatchETagHeader != "" {
|
|
if objInfo.ETag != "" && isETagEqual(objInfo.ETag, ifNoneMatchETagHeader) {
|
|
// If the object ETag matches with the specified ETag.
|
|
writeHeaders()
|
|
writeErrorResponse(w, ErrPreconditionFailed, r.URL)
|
|
return true
|
|
}
|
|
}
|
|
// Object content should be written to http.ResponseWriter
|
|
return false
|
|
}
|
|
|
|
// Validates the preconditions. Returns true if GET/HEAD operation should not proceed.
|
|
// Preconditions supported are:
|
|
// If-Modified-Since
|
|
// If-Unmodified-Since
|
|
// If-Match
|
|
// If-None-Match
|
|
func checkPreconditions(w http.ResponseWriter, r *http.Request, objInfo ObjectInfo) bool {
|
|
// Return false for methods other than GET and HEAD.
|
|
if r.Method != "GET" && r.Method != "HEAD" {
|
|
return false
|
|
}
|
|
// If the object doesn't have a modtime (IsZero), or the modtime
|
|
// is obviously garbage (Unix time == 0), then ignore modtimes
|
|
// and don't process the If-Modified-Since header.
|
|
if objInfo.ModTime.IsZero() || objInfo.ModTime.Equal(time.Unix(0, 0)) {
|
|
return false
|
|
}
|
|
|
|
// Headers to be set of object content is not going to be written to the client.
|
|
writeHeaders := func() {
|
|
// set common headers
|
|
setCommonHeaders(w)
|
|
|
|
// set object-related metadata headers
|
|
w.Header().Set("Last-Modified", objInfo.ModTime.UTC().Format(http.TimeFormat))
|
|
|
|
if objInfo.ETag != "" {
|
|
w.Header().Set("ETag", "\""+objInfo.ETag+"\"")
|
|
}
|
|
}
|
|
// If-Modified-Since : Return the object only if it has been modified since the specified time,
|
|
// otherwise return a 304 (not modified).
|
|
ifModifiedSinceHeader := r.Header.Get("If-Modified-Since")
|
|
if ifModifiedSinceHeader != "" {
|
|
if givenTime, err := time.Parse(http.TimeFormat, ifModifiedSinceHeader); err == nil {
|
|
if !ifModifiedSince(objInfo.ModTime, givenTime) {
|
|
// If the object is not modified since the specified time.
|
|
writeHeaders()
|
|
w.WriteHeader(http.StatusNotModified)
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
|
|
// If-Unmodified-Since : Return the object only if it has not been modified since the specified
|
|
// time, otherwise return a 412 (precondition failed).
|
|
ifUnmodifiedSinceHeader := r.Header.Get("If-Unmodified-Since")
|
|
if ifUnmodifiedSinceHeader != "" {
|
|
if givenTime, err := time.Parse(http.TimeFormat, ifUnmodifiedSinceHeader); err == nil {
|
|
if ifModifiedSince(objInfo.ModTime, givenTime) {
|
|
// If the object is modified since the specified time.
|
|
writeHeaders()
|
|
writeErrorResponse(w, ErrPreconditionFailed, r.URL)
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
|
|
// If-Match : Return the object only if its entity tag (ETag) is the same as the one specified;
|
|
// otherwise return a 412 (precondition failed).
|
|
ifMatchETagHeader := r.Header.Get("If-Match")
|
|
if ifMatchETagHeader != "" {
|
|
if !isETagEqual(objInfo.ETag, ifMatchETagHeader) {
|
|
// If the object ETag does not match with the specified ETag.
|
|
writeHeaders()
|
|
writeErrorResponse(w, ErrPreconditionFailed, r.URL)
|
|
return true
|
|
}
|
|
}
|
|
|
|
// If-None-Match : Return the object only if its entity tag (ETag) is different from the
|
|
// one specified otherwise, return a 304 (not modified).
|
|
ifNoneMatchETagHeader := r.Header.Get("If-None-Match")
|
|
if ifNoneMatchETagHeader != "" {
|
|
if isETagEqual(objInfo.ETag, ifNoneMatchETagHeader) {
|
|
// If the object ETag matches with the specified ETag.
|
|
writeHeaders()
|
|
w.WriteHeader(http.StatusNotModified)
|
|
return true
|
|
}
|
|
}
|
|
// Object content should be written to http.ResponseWriter
|
|
return false
|
|
}
|
|
|
|
// returns true if object was modified after givenTime.
|
|
func ifModifiedSince(objTime time.Time, givenTime time.Time) bool {
|
|
// The Date-Modified header truncates sub-second precision, so
|
|
// use mtime < t+1s instead of mtime <= t to check for unmodified.
|
|
if objTime.After(givenTime.Add(1 * time.Second)) {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// canonicalizeETag returns ETag with leading and trailing double-quotes removed,
|
|
// if any present
|
|
func canonicalizeETag(etag string) string {
|
|
canonicalETag := strings.TrimPrefix(etag, "\"")
|
|
return strings.TrimSuffix(canonicalETag, "\"")
|
|
}
|
|
|
|
// isETagEqual return true if the canonical representations of two ETag strings
|
|
// are equal, false otherwise
|
|
func isETagEqual(left, right string) bool {
|
|
return canonicalizeETag(left) == canonicalizeETag(right)
|
|
}
|
|
|
|
// deleteObject is a convenient wrapper to delete an object, this
|
|
// is a common function to be called from object handlers and
|
|
// web handlers.
|
|
func deleteObject(ctx context.Context, obj ObjectLayer, cache CacheObjectLayer, bucket, object string, r *http.Request) (err error) {
|
|
deleteObject := obj.DeleteObject
|
|
if cache != nil {
|
|
deleteObject = cache.DeleteObject
|
|
}
|
|
// Proceed to delete the object.
|
|
if err = deleteObject(ctx, bucket, object); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Get host and port from Request.RemoteAddr.
|
|
host, port, _ := net.SplitHostPort(handlers.GetSourceIP(r))
|
|
|
|
// Notify object deleted event.
|
|
sendEvent(eventArgs{
|
|
EventName: event.ObjectRemovedDelete,
|
|
BucketName: bucket,
|
|
Object: ObjectInfo{
|
|
Name: object,
|
|
},
|
|
ReqParams: extractReqParams(r),
|
|
UserAgent: r.UserAgent(),
|
|
Host: host,
|
|
Port: port,
|
|
})
|
|
|
|
return nil
|
|
}
|