mirror of
https://github.com/minio/minio.git
synced 2024-12-26 23:25:54 -05:00
fba883839d
Optionally allows customers to enable - Enable an external cache to catch GET/HEAD responses - Enable skipping disks that are slow to respond in GET/HEAD when we have already achieved a quorum
112 lines
3.7 KiB
Go
112 lines
3.7 KiB
Go
package cache
|
|
|
|
import (
|
|
"net/http"
|
|
"regexp"
|
|
"strconv"
|
|
"time"
|
|
|
|
"github.com/minio/minio/internal/amztime"
|
|
xhttp "github.com/minio/minio/internal/http"
|
|
)
|
|
|
|
//go:generate msgp -file=$GOFILE
|
|
|
|
// ObjectInfo represents the object information cached remotely
|
|
type ObjectInfo struct {
|
|
Key string `json:"key"`
|
|
Bucket string `json:"bucket"`
|
|
ETag string `json:"etag"`
|
|
ModTime time.Time `json:"modTime"`
|
|
StatusCode int `json:"statusCode"`
|
|
|
|
// Optional elements
|
|
CacheControl string `json:"cacheControl,omitempty" msg:",omitempty"`
|
|
Expires string `json:"expires,omitempty" msg:",omitempty"`
|
|
Metadata map[string]string `json:"metadata,omitempty" msg:",omitempty"`
|
|
Range string `json:"range,omitempty" msg:",omitempty"`
|
|
PartNumber int `json:"partNumber,omitempty" msg:",omitempty"`
|
|
Size int64 `json:"size,omitempty" msg:",omitempty"` // Full size of the object
|
|
Data []byte `json:"data,omitempty" msg:",omitempty"` // Data can container full data of the object or partial
|
|
}
|
|
|
|
// WriteHeaders writes the response headers for conditional requests
|
|
func (oi ObjectInfo) WriteHeaders(w http.ResponseWriter, preamble, statusCode func()) {
|
|
preamble()
|
|
|
|
if !oi.ModTime.IsZero() {
|
|
w.Header().Set(xhttp.LastModified, oi.ModTime.UTC().Format(http.TimeFormat))
|
|
}
|
|
|
|
if oi.ETag != "" {
|
|
w.Header()[xhttp.ETag] = []string{"\"" + oi.ETag + "\""}
|
|
}
|
|
|
|
if oi.Expires != "" {
|
|
w.Header().Set(xhttp.Expires, oi.Expires)
|
|
}
|
|
|
|
if oi.CacheControl != "" {
|
|
w.Header().Set(xhttp.CacheControl, oi.CacheControl)
|
|
}
|
|
|
|
statusCode()
|
|
}
|
|
|
|
// CondCheck represents the conditional request made to the remote cache
|
|
// for validation during GET/HEAD object requests.
|
|
type CondCheck struct {
|
|
ObjectInfo
|
|
IfMatch string `json:"ifMatch,omitempty" msg:",omitempty"`
|
|
IfNoneMatch string `json:"ifNoneMatch,omitempty" msg:",omitempty"`
|
|
IfModifiedSince *time.Time `json:"ifModSince,omitempty" msg:",omitempty"`
|
|
IfUnModifiedSince *time.Time `json:"ifUnmodSince,omitempty" msg:",omitempty"`
|
|
IfRange string `json:"ifRange,omitempty" msg:",omitempty"`
|
|
IfPartNumber int `json:"ifPartNumber,omitempty" msg:",omitempty"`
|
|
}
|
|
|
|
// IsSet tells the cache lookup to avoid sending a request
|
|
func (r *CondCheck) IsSet() bool {
|
|
if r == nil {
|
|
return false
|
|
}
|
|
return r.IfMatch != "" || r.IfNoneMatch != "" || r.IfModifiedSince != nil || r.IfUnModifiedSince != nil || r.IfRange != ""
|
|
}
|
|
|
|
var etagRegex = regexp.MustCompile("\"*?([^\"]*?)\"*?$")
|
|
|
|
// canonicalizeETag returns ETag with leading and trailing double-quotes removed,
|
|
// if any present
|
|
func canonicalizeETag(etag string) string {
|
|
return etagRegex.ReplaceAllString(etag, "$1")
|
|
}
|
|
|
|
// Init - populates the input values, initializes CondCheck
|
|
// before sending the request remotely.
|
|
func (r *CondCheck) Init(bucket, object string, header http.Header) {
|
|
r.Key = object
|
|
r.Bucket = bucket
|
|
|
|
ifModifiedSinceHeader := header.Get(xhttp.IfModifiedSince)
|
|
if ifModifiedSinceHeader != "" {
|
|
if givenTime, err := amztime.ParseHeader(ifModifiedSinceHeader); err == nil {
|
|
r.IfModifiedSince = &givenTime
|
|
}
|
|
}
|
|
ifUnmodifiedSinceHeader := header.Get(xhttp.IfUnmodifiedSince)
|
|
if ifUnmodifiedSinceHeader != "" {
|
|
if givenTime, err := amztime.ParseHeader(ifUnmodifiedSinceHeader); err == nil {
|
|
r.IfUnModifiedSince = &givenTime
|
|
}
|
|
}
|
|
r.IfMatch = canonicalizeETag(header.Get(xhttp.IfMatch))
|
|
r.IfNoneMatch = canonicalizeETag(header.Get(xhttp.IfNoneMatch))
|
|
r.IfRange = header.Get(xhttp.Range)
|
|
ifPartNumberHeader := header.Get(xhttp.PartNumber)
|
|
if ifPartNumberHeader != "" {
|
|
if partNumber, err := strconv.Atoi(ifPartNumberHeader); err == nil {
|
|
r.IfPartNumber = partNumber
|
|
}
|
|
}
|
|
}
|