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minio/cmd/web-handler-context.go

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6.2 KiB

/*
* MinIO Cloud Storage, (C) 2019 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"
"encoding/json"
"fmt"
"net/http"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/handlers"
)
const (
kmBucket = "BucketName"
kmObject = "ObjectName"
kmObjects = "Objects"
kmPrefix = "Prefix"
kmMarker = "Marker"
kmUsername = "UserName"
kmHostname = "HostName"
kmPolicy = "Policy"
)
// KeyValueMap extends builtin map to support setting and getting
// select fields like BucketName, ObjectName, Prefix, etc.
type KeyValueMap map[string]string
// Bucket returns the BucketName
func (km KeyValueMap) Bucket() string {
return km[kmBucket]
}
// Object returns the ObjectName
func (km KeyValueMap) Object() string {
return km[kmObject]
}
// Prefix returns the Prefix
func (km KeyValueMap) Prefix() string {
return km[kmPrefix]
}
// Username returns the Username
func (km KeyValueMap) Username() string {
return km[kmUsername]
}
// Hostname returns the Hostname
func (km KeyValueMap) Hostname() string {
return km[kmHostname]
}
// Policy returns the Policy
func (km KeyValueMap) Policy() string {
return km[kmPolicy]
}
// Objects returns the Objects
func (km KeyValueMap) Objects() []string {
var objects []string
_ = json.Unmarshal([]byte(km[kmObjects]), &objects)
return objects
}
// SetBucket sets the given bucket to the KeyValueMap
func (km *KeyValueMap) SetBucket(bucket string) {
(*km)[kmBucket] = bucket
}
// SetPrefix sets the given prefix to the KeyValueMap
func (km *KeyValueMap) SetPrefix(prefix string) {
(*km)[kmPrefix] = prefix
}
// SetObject sets the given object to the KeyValueMap
func (km *KeyValueMap) SetObject(object string) {
(*km)[kmObject] = object
}
// SetMarker sets the given marker to the KeyValueMap
func (km *KeyValueMap) SetMarker(marker string) {
(*km)[kmMarker] = marker
}
// SetPolicy sets the given policy to the KeyValueMap
func (km *KeyValueMap) SetPolicy(policy string) {
(*km)[kmPolicy] = policy
}
// SetExpiry sets the expiry to the KeyValueMap
func (km *KeyValueMap) SetExpiry(expiry int64) {
(*km)[kmPolicy] = fmt.Sprintf("%d", expiry)
}
// SetObjects sets the list of objects to the KeyValueMap
func (km *KeyValueMap) SetObjects(objects []string) {
objsVal, err := json.Marshal(objects)
if err != nil {
// NB this can only happen when we can't marshal a Go
// slice to its json representation.
objsVal = []byte("[]")
}
(*km)[kmObjects] = string(objsVal)
}
// SetUsername sets the username to the KeyValueMap
func (km *KeyValueMap) SetUsername(username string) {
(*km)[kmUsername] = username
}
// SetHostname sets the hostname to the KeyValueMap
func (km *KeyValueMap) SetHostname(hostname string) {
(*km)[kmHostname] = hostname
}
// ToKeyValuer interface wraps ToKeyValue method that allows types to
// marshal their values as a map of structure member names to their
// values, as strings
type ToKeyValuer interface {
ToKeyValue() KeyValueMap
}
// ToKeyValue implementation for WebGenericArgs
func (args *WebGenericArgs) ToKeyValue() KeyValueMap {
return KeyValueMap{}
}
// ToKeyValue implementation for MakeBucketArgs
func (args *MakeBucketArgs) ToKeyValue() KeyValueMap {
km := KeyValueMap{}
km.SetBucket(args.BucketName)
return km
}
// ToKeyValue implementation for RemoveBucketArgs
func (args *RemoveBucketArgs) ToKeyValue() KeyValueMap {
km := KeyValueMap{}
km.SetBucket(args.BucketName)
return km
}
// ToKeyValue implementation for ListObjectsArgs
func (args *ListObjectsArgs) ToKeyValue() KeyValueMap {
km := KeyValueMap{}
km.SetBucket(args.BucketName)
km.SetPrefix(args.Prefix)
km.SetMarker(args.Marker)
return km
}
// ToKeyValue implementation for RemoveObjectArgs
func (args *RemoveObjectArgs) ToKeyValue() KeyValueMap {
km := KeyValueMap{}
km.SetBucket(args.BucketName)
km.SetObjects(args.Objects)
return km
}
// ToKeyValue implementation for LoginArgs
func (args *LoginArgs) ToKeyValue() KeyValueMap {
km := KeyValueMap{}
km.SetUsername(args.Username)
return km
}
// ToKeyValue implementation for GetBucketPolicyArgs
func (args *GetBucketPolicyArgs) ToKeyValue() KeyValueMap {
km := KeyValueMap{}
km.SetBucket(args.BucketName)
km.SetPrefix(args.Prefix)
return km
}
// ToKeyValue implementation for ListAllBucketPoliciesArgs
func (args *ListAllBucketPoliciesArgs) ToKeyValue() KeyValueMap {
km := KeyValueMap{}
km.SetBucket(args.BucketName)
return km
}
// ToKeyValue implementation for SetBucketPolicyWebArgs
func (args *SetBucketPolicyWebArgs) ToKeyValue() KeyValueMap {
km := KeyValueMap{}
km.SetBucket(args.BucketName)
km.SetPrefix(args.Prefix)
km.SetPolicy(args.Policy)
return km
}
// ToKeyValue implementation for SetAuthArgs
// SetAuthArgs doesn't implement the ToKeyValue interface that will be
// used by logger subsystem down the line, to avoid leaking
// credentials to an external log target
func (args *SetAuthArgs) ToKeyValue() KeyValueMap {
return KeyValueMap{}
}
// ToKeyValue implementation for PresignedGetArgs
func (args *PresignedGetArgs) ToKeyValue() KeyValueMap {
km := KeyValueMap{}
km.SetHostname(args.HostName)
km.SetBucket(args.BucketName)
km.SetObject(args.ObjectName)
km.SetExpiry(args.Expiry)
return km
}
// newWebContext creates a context with ReqInfo values from the given
// http request and api name.
func newWebContext(r *http.Request, args ToKeyValuer, api string) context.Context {
argsMap := args.ToKeyValue()
bucket := argsMap.Bucket()
object := argsMap.Object()
prefix := argsMap.Prefix()
if prefix != "" {
object = prefix
}
reqInfo := &logger.ReqInfo{
DeploymentID: globalDeploymentID,
RemoteHost: handlers.GetSourceIP(r),
UserAgent: r.UserAgent(),
API: api,
BucketName: bucket,
ObjectName: object,
}
return logger.SetReqInfo(context.Background(), reqInfo)
}