457 lines
13 KiB
Go
457 lines
13 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016 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 main
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import (
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"fmt"
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"net/http"
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"os"
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"path"
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"path/filepath"
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"runtime"
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"strconv"
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"time"
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jwtgo "github.com/dgrijalva/jwt-go"
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"github.com/dustin/go-humanize"
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"github.com/gorilla/mux"
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"github.com/gorilla/rpc/v2/json2"
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"github.com/minio/miniobrowser"
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)
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// isJWTReqAuthenticated validates if any incoming request to be a
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// valid JWT authenticated request.
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func isJWTReqAuthenticated(req *http.Request) bool {
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jwt, err := newJWT()
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if err != nil {
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errorIf(err, "unable to initialize a new JWT")
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return false
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}
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token, e := jwtgo.ParseFromRequest(req, func(token *jwtgo.Token) (interface{}, error) {
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if _, ok := token.Method.(*jwtgo.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
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}
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return []byte(jwt.SecretAccessKey), nil
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})
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if e != nil {
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errorIf(e, "token parsing failed")
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return false
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}
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return token.Valid
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}
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// WebGenericArgs - empty struct for calls that don't accept arguments
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// for ex. ServerInfo, GenerateAuth
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type WebGenericArgs struct{}
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// WebGenericRep - reply structure for calls for which reply is success/failure
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// for ex. RemoveObject MakeBucket
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type WebGenericRep struct {
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UIVersion string `json:"uiVersion"`
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}
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// ServerInfoRep - server info reply.
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type ServerInfoRep struct {
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MinioVersion string
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MinioMemory string
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MinioPlatform string
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MinioRuntime string
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UIVersion string `json:"uiVersion"`
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}
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// ServerInfo - get server info.
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func (web *webAPIHandlers) ServerInfo(r *http.Request, args *WebGenericArgs, reply *ServerInfoRep) error {
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if !isJWTReqAuthenticated(r) {
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return &json2.Error{Message: "Unauthorized request"}
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}
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host, err := os.Hostname()
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if err != nil {
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host = ""
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}
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memstats := &runtime.MemStats{}
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runtime.ReadMemStats(memstats)
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mem := fmt.Sprintf("Used: %s | Allocated: %s | Used-Heap: %s | Allocated-Heap: %s",
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humanize.Bytes(memstats.Alloc),
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humanize.Bytes(memstats.TotalAlloc),
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humanize.Bytes(memstats.HeapAlloc),
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humanize.Bytes(memstats.HeapSys))
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platform := fmt.Sprintf("Host: %s | OS: %s | Arch: %s",
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host,
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runtime.GOOS,
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runtime.GOARCH)
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goruntime := fmt.Sprintf("Version: %s | CPUs: %s", runtime.Version(), strconv.Itoa(runtime.NumCPU()))
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reply.MinioVersion = minioVersion
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reply.MinioMemory = mem
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reply.MinioPlatform = platform
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reply.MinioRuntime = goruntime
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reply.UIVersion = miniobrowser.UIVersion
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return nil
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}
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// StorageInfoRep - contains storage usage statistics.
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type StorageInfoRep struct {
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StorageInfo StorageInfo `json:"storageInfo"`
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UIVersion string `json:"uiVersion"`
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}
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// StorageInfo - web call to gather storage usage statistics.
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func (web *webAPIHandlers) StorageInfo(r *http.Request, args *GenericArgs, reply *StorageInfoRep) error {
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if !isJWTReqAuthenticated(r) {
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return &json2.Error{Message: "Unauthorized request"}
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}
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reply.UIVersion = miniobrowser.UIVersion
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reply.StorageInfo = web.ObjectAPI.StorageInfo()
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return nil
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}
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// MakeBucketArgs - make bucket args.
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type MakeBucketArgs struct {
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BucketName string `json:"bucketName"`
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}
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// MakeBucket - make a bucket.
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func (web *webAPIHandlers) MakeBucket(r *http.Request, args *MakeBucketArgs, reply *WebGenericRep) error {
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if !isJWTReqAuthenticated(r) {
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return &json2.Error{Message: "Unauthorized request"}
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}
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reply.UIVersion = miniobrowser.UIVersion
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if err := web.ObjectAPI.MakeBucket(args.BucketName); err != nil {
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return &json2.Error{Message: err.Error()}
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}
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return nil
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}
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// ListBucketsRep - list buckets response
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type ListBucketsRep struct {
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Buckets []WebBucketInfo `json:"buckets"`
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UIVersion string `json:"uiVersion"`
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}
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// WebBucketInfo container for list buckets metadata.
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type WebBucketInfo struct {
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// The name of the bucket.
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Name string `json:"name"`
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// Date the bucket was created.
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CreationDate time.Time `json:"creationDate"`
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}
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// ListBuckets - list buckets api.
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func (web *webAPIHandlers) ListBuckets(r *http.Request, args *WebGenericArgs, reply *ListBucketsRep) error {
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if !isJWTReqAuthenticated(r) {
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return &json2.Error{Message: "Unauthorized request"}
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}
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buckets, err := web.ObjectAPI.ListBuckets()
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if err != nil {
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return &json2.Error{Message: err.Error()}
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}
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for _, bucket := range buckets {
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// List all buckets which are not private.
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if bucket.Name != path.Base(reservedBucket) {
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reply.Buckets = append(reply.Buckets, WebBucketInfo{
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Name: bucket.Name,
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CreationDate: bucket.Created,
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})
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}
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}
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reply.UIVersion = miniobrowser.UIVersion
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return nil
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}
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// ListObjectsArgs - list object args.
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type ListObjectsArgs struct {
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BucketName string `json:"bucketName"`
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Prefix string `json:"prefix"`
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}
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// ListObjectsRep - list objects response.
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type ListObjectsRep struct {
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Objects []WebObjectInfo `json:"objects"`
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UIVersion string `json:"uiVersion"`
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}
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// WebObjectInfo container for list objects metadata.
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type WebObjectInfo struct {
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// Name of the object
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Key string `json:"name"`
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// Date and time the object was last modified.
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LastModified time.Time `json:"lastModified"`
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// Size in bytes of the object.
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Size int64 `json:"size"`
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// ContentType is mime type of the object.
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ContentType string `json:"contentType"`
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}
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// ListObjects - list objects api.
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func (web *webAPIHandlers) ListObjects(r *http.Request, args *ListObjectsArgs, reply *ListObjectsRep) error {
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marker := ""
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if !isJWTReqAuthenticated(r) {
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return &json2.Error{Message: "Unauthorized request"}
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}
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for {
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lo, err := web.ObjectAPI.ListObjects(args.BucketName, args.Prefix, marker, "/", 1000)
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if err != nil {
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return &json2.Error{Message: err.Error()}
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}
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marker = lo.NextMarker
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for _, obj := range lo.Objects {
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reply.Objects = append(reply.Objects, WebObjectInfo{
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Key: obj.Name,
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LastModified: obj.ModTime,
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Size: obj.Size,
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})
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}
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for _, prefix := range lo.Prefixes {
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reply.Objects = append(reply.Objects, WebObjectInfo{
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Key: prefix,
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})
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}
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if !lo.IsTruncated {
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break
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}
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}
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reply.UIVersion = miniobrowser.UIVersion
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return nil
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}
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// RemoveObjectArgs - args to remove an object
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type RemoveObjectArgs struct {
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TargetHost string `json:"targetHost"`
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BucketName string `json:"bucketName"`
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ObjectName string `json:"objectName"`
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}
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// RemoveObject - removes an object.
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func (web *webAPIHandlers) RemoveObject(r *http.Request, args *RemoveObjectArgs, reply *WebGenericRep) error {
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if !isJWTReqAuthenticated(r) {
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return &json2.Error{Message: "Unauthorized request"}
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}
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reply.UIVersion = miniobrowser.UIVersion
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if err := web.ObjectAPI.DeleteObject(args.BucketName, args.ObjectName); err != nil {
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return &json2.Error{Message: err.Error()}
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}
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return nil
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}
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// LoginArgs - login arguments.
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type LoginArgs struct {
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Username string `json:"username" form:"username"`
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Password string `json:"password" form:"password"`
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}
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// LoginRep - login reply.
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type LoginRep struct {
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Token string `json:"token"`
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UIVersion string `json:"uiVersion"`
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}
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// Login - user login handler.
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func (web *webAPIHandlers) Login(r *http.Request, args *LoginArgs, reply *LoginRep) error {
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jwt, err := newJWT()
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if err != nil {
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return &json2.Error{Message: err.Error()}
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}
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if err = jwt.Authenticate(args.Username, args.Password); err != nil {
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return &json2.Error{Message: err.Error()}
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}
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token, err := jwt.GenerateToken(args.Username)
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if err != nil {
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return &json2.Error{Message: err.Error()}
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}
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reply.Token = token
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reply.UIVersion = miniobrowser.UIVersion
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return nil
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}
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// GenerateAuthReply - reply for GenerateAuth
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type GenerateAuthReply struct {
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AccessKey string `json:"accessKey"`
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SecretKey string `json:"secretKey"`
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UIVersion string `json:"uiVersion"`
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}
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func (web webAPIHandlers) GenerateAuth(r *http.Request, args *WebGenericArgs, reply *GenerateAuthReply) error {
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if !isJWTReqAuthenticated(r) {
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return &json2.Error{Message: "Unauthorized request"}
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}
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cred := mustGenAccessKeys()
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reply.AccessKey = cred.AccessKeyID
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reply.SecretKey = cred.SecretAccessKey
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reply.UIVersion = miniobrowser.UIVersion
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return nil
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}
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// SetAuthArgs - argument for SetAuth
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type SetAuthArgs struct {
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AccessKey string `json:"accessKey"`
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SecretKey string `json:"secretKey"`
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}
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// SetAuthReply - reply for SetAuth
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type SetAuthReply struct {
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Token string `json:"token"`
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UIVersion string `json:"uiVersion"`
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}
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// SetAuth - Set accessKey and secretKey credentials.
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func (web *webAPIHandlers) SetAuth(r *http.Request, args *SetAuthArgs, reply *SetAuthReply) error {
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if !isJWTReqAuthenticated(r) {
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return &json2.Error{Message: "Unauthorized request"}
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}
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if !isValidAccessKey.MatchString(args.AccessKey) {
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return &json2.Error{Message: "Invalid Access Key"}
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}
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if !isValidSecretKey.MatchString(args.SecretKey) {
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return &json2.Error{Message: "Invalid Secret Key"}
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}
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cred := credential{args.AccessKey, args.SecretKey}
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serverConfig.SetCredential(cred)
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if err := serverConfig.Save(); err != nil {
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return &json2.Error{Message: err.Error()}
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}
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jwt, err := newJWT()
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if err != nil {
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return &json2.Error{Message: err.Error()}
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}
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if err = jwt.Authenticate(args.AccessKey, args.SecretKey); err != nil {
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return &json2.Error{Message: err.Error()}
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}
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token, err := jwt.GenerateToken(args.AccessKey)
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if err != nil {
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return &json2.Error{Message: err.Error()}
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}
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reply.Token = token
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reply.UIVersion = miniobrowser.UIVersion
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return nil
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}
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// GetAuthReply - Reply current credentials.
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type GetAuthReply struct {
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AccessKey string `json:"accessKey"`
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SecretKey string `json:"secretKey"`
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UIVersion string `json:"uiVersion"`
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}
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// GetAuth - return accessKey and secretKey credentials.
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func (web *webAPIHandlers) GetAuth(r *http.Request, args *WebGenericArgs, reply *GetAuthReply) error {
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if !isJWTReqAuthenticated(r) {
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return &json2.Error{Message: "Unauthorized request"}
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}
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creds := serverConfig.GetCredential()
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reply.AccessKey = creds.AccessKeyID
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reply.SecretKey = creds.SecretAccessKey
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reply.UIVersion = miniobrowser.UIVersion
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return nil
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}
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// Upload - file upload handler.
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func (web *webAPIHandlers) Upload(w http.ResponseWriter, r *http.Request) {
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if !isJWTReqAuthenticated(r) {
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writeWebErrorResponse(w, errInvalidToken)
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return
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}
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vars := mux.Vars(r)
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bucket := vars["bucket"]
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object := vars["object"]
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// FIXME: Allow file upload handler to set content-type, content-encoding.
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if _, err := web.ObjectAPI.PutObject(bucket, object, -1, r.Body, nil); err != nil {
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writeWebErrorResponse(w, err)
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}
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}
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// Download - file download handler.
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func (web *webAPIHandlers) Download(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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bucket := vars["bucket"]
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object := vars["object"]
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token := r.URL.Query().Get("token")
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jwt, err := newJWT()
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if err != nil {
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errorIf(err, "error in getting new JWT")
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return
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}
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jwttoken, e := jwtgo.Parse(token, func(token *jwtgo.Token) (interface{}, error) {
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if _, ok := token.Method.(*jwtgo.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
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}
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return []byte(jwt.SecretAccessKey), nil
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})
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if e != nil || !jwttoken.Valid {
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writeWebErrorResponse(w, errInvalidToken)
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return
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}
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// Add content disposition.
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w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", filepath.Base(object)))
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objInfo, err := web.ObjectAPI.GetObjectInfo(bucket, object)
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if err != nil {
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writeWebErrorResponse(w, err)
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return
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}
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offset := int64(0)
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err = web.ObjectAPI.GetObject(bucket, object, offset, objInfo.Size, w)
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if err != nil {
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/// No need to print error, response writer already written to.
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return
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}
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}
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// writeWebErrorResponse - set HTTP status code and write error description to the body.
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func writeWebErrorResponse(w http.ResponseWriter, err error) {
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// Handle invalid token as a special case.
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if err == errInvalidToken {
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w.WriteHeader(http.StatusForbidden)
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w.Write([]byte(err.Error()))
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return
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}
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// Convert error type to api error code.
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var apiErrCode APIErrorCode
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switch err.(type) {
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case StorageFull:
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apiErrCode = ErrStorageFull
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case BucketNotFound:
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apiErrCode = ErrNoSuchBucket
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case BucketNameInvalid:
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apiErrCode = ErrInvalidBucketName
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case BadDigest:
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apiErrCode = ErrBadDigest
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case IncompleteBody:
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apiErrCode = ErrIncompleteBody
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case ObjectExistsAsDirectory:
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apiErrCode = ErrObjectExistsAsDirectory
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case ObjectNotFound:
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apiErrCode = ErrNoSuchKey
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case ObjectNameInvalid:
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apiErrCode = ErrNoSuchKey
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case InsufficientWriteQuorum:
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apiErrCode = ErrWriteQuorum
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case InsufficientReadQuorum:
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apiErrCode = ErrReadQuorum
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default:
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apiErrCode = ErrInternalError
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}
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apiErr := getAPIError(apiErrCode)
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w.WriteHeader(apiErr.HTTPStatusCode)
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w.Write([]byte(apiErr.Description))
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}
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