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