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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"compress/gzip"
"net"
"net/http"
"github.com/gorilla/mux"
"github.com/klauspost/compress/gzhttp"
"github.com/minio/console/restapi"
xhttp "github.com/minio/minio/internal/http"
"github.com/minio/minio/internal/logger"
"github.com/minio/pkg/wildcard"
"github.com/rs/cors"
)
func newHTTPServerFn() *xhttp.Server {
globalObjLayerMutex.RLock()
defer globalObjLayerMutex.RUnlock()
return globalHTTPServer
}
func setHTTPServer(h *xhttp.Server) {
globalObjLayerMutex.Lock()
globalHTTPServer = h
globalObjLayerMutex.Unlock()
}
func newConsoleServerFn() *restapi.Server {
globalObjLayerMutex.RLock()
defer globalObjLayerMutex.RUnlock()
return globalConsoleSrv
}
func setConsoleSrv(srv *restapi.Server) {
globalObjLayerMutex.Lock()
globalConsoleSrv = srv
globalObjLayerMutex.Unlock()
}
func newObjectLayerFn() ObjectLayer {
globalObjLayerMutex.RLock()
defer globalObjLayerMutex.RUnlock()
return globalObjectAPI
}
func newCachedObjectLayerFn() CacheObjectLayer {
globalObjLayerMutex.RLock()
defer globalObjLayerMutex.RUnlock()
return globalCacheObjectAPI
}
func setCacheObjectLayer(c CacheObjectLayer) {
globalObjLayerMutex.Lock()
globalCacheObjectAPI = c
globalObjLayerMutex.Unlock()
}
func setObjectLayer(o ObjectLayer) {
globalObjLayerMutex.Lock()
globalObjectAPI = o
globalObjLayerMutex.Unlock()
}
// objectAPIHandler implements and provides http handlers for S3 API.
type objectAPIHandlers struct {
ObjectAPI func() ObjectLayer
CacheAPI func() CacheObjectLayer
}
// getHost tries its best to return the request host.
// According to section 14.23 of RFC 2
8000
616 the Host header
// can include the port number if the default value of 80 is not used.
func getHost(r *http.Request) string {
if r.URL.IsAbs() {
return r.URL.Host
}
return r.Host
}
func notImplementedHandler(w http.ResponseWriter, r *http.Request) {
writeErrorResponse(r.Context(), w, errorCodes.ToAPIErr(ErrNotImplemented), r.URL)
}
type rejectedAPI struct {
api string
methods []string
queries []string
path string
}
var rejectedObjAPIs = []rejectedAPI{
{
api: "torrent",
methods: []string{http.MethodPut, http.MethodDelete, http.MethodGet},
queries: []string{"torrent", ""},
path: "/{object:.+}",
},
{
api: "acl",
methods: []string{http.MethodDelete},
queries: []string{"acl", ""},
path: "/{object:.+}",
},
}
var rejectedBucketAPIs = []rejectedAPI{
{
api: "inventory",
methods: []string{http.MethodGet, http.MethodPut, http.MethodDelete},
queries: []string{"inventory", ""},
},
{
api: "cors",
methods: []string{http.MethodPut, http.MethodDelete},
queries: []string{"cors", ""},
},
{
api: "metrics",
methods: []string{http.MethodGet, http.MethodPut, http.MethodDelete},
queries: []string{"metrics", ""},
},
{
api: "website",
methods: []string{http.MethodPut},
queries: []string{"website", ""},
},
{
api: "logging",
methods: []string{http.MethodPut, http.MethodDelete},
queries: []string{"logging", ""},
},
{
api: "accelerate",
methods: []string{http.MethodPut, http.MethodDelete},
queries: []string{"accelerate", ""},
},
{
api: "requestPayment",
methods: []string{http.MethodPut, http.MethodDelete},
queries: []string{"requestPayment", ""},
},
{
api: "acl",
methods: []string{http.MethodDelete, http.MethodPut, http.MethodHead},
queries: []string{"acl", ""},
},
{
api: "publicAccessBlock",
methods: []string{http.MethodDelete, http.MethodPut, http.MethodGet},
queries: []string{"publicAccessBlock", ""},
},
{
api: "ownershipControls",
methods: []string{http.MethodDelete, http.MethodPut, http.MethodGet},
queries: []string{"ownershipControls", ""},
},
{
api: "intelligent-tiering",
methods: []string{http.MethodDelete, http.MethodPut, http.MethodGet},
queries: []string{"intelligent-tiering", ""},
},
{
api: "analytics",
methods: []string{http.MethodDelete, http.MethodPut, http.MethodGet},
queries: []string{"analytics", ""},
},
}
// registerAPIRouter - registers S3 compatible APIs.
func registerAPIRouter(router *mux.Router) {
// Initialize API.
api := objectAPIHandlers{
ObjectAPI: newObjectLayerFn,
CacheAPI: newCachedObjectLayerFn,
}
// API Router
apiRouter := router.PathPrefix(SlashSeparator).Subrouter()
var routers []*mux.Router
for _, domainName := range globalDomainNames {
if IsKubernetes() {
routers = append(routers, apiRouter.MatcherFunc(func(r *http.Request, match *mux.RouteMatch) bool {
host, _, err := net.SplitHostPort(getHost(r))
if err != nil {
host = r.Host
}
// Make sure to skip matching minio.<domain>` this is
// specifically meant for operator/k8s deployment
// The reason we need to skip this is for a special
// usecase where we need to make sure that
// minio.<namespace>.svc.<cluster_domain> is ignored
// by the bucketDNS style to ensure that path style
// is available and honored at this domain.
//
// All other `<bucket>.<namespace>.svc.<cluster_domain>`
// makes sure that buckets are routed through this matcher
// to match for `<bucket>`
return host != minioReservedBucket+"."+domainName
}).Host("{bucket:.+}.&quo
8000
t;+domainName).Subrouter())
} else {
routers = append(routers, apiRouter.Host("{bucket:.+}."+domainName).Subrouter())
}
}
routers = append(routers, apiRouter.PathPrefix("/{bucket}").Subrouter())
gz, err := gzhttp.NewWrapper(gzhttp.MinSize(1000), gzhttp.CompressionLevel(gzip.BestSpeed))
if err != nil {
// Static params, so this is very unlikely.
logger.Fatal(err, "Unable to initialize server")
}
for _, router := range routers {
// Register all rejected object APIs
for _, r := range rejectedObjAPIs {
t := router.Methods(r.methods...).
HandlerFunc(collectAPIStats(r.api, httpTraceAll(notImplementedHandler))).
Queries(r.queries...)
t.Path(r.path)
}
// Object operations
// HeadObject
router.Methods(http.MethodHead).Path("/{object:.+}").HandlerFunc(
collectAPIStats("headobject", maxClients(gz(httpTraceAll(api.HeadObjectHandler)))))
// CopyObjectPart
router.Methods(http.MethodPut).Path("/{object:.+}").
HeadersRegexp(xhttp.AmzCopySource, ".*?(\\/|%2F).*?").
HandlerFunc(collectAPIStats("copyobjectpart", maxClients(gz(httpTraceAll(api.CopyObjectPartHandler))))).
Queries("partNumber", "{partNumber:[0-9]+}", "uploadId", "{uploadId:.*}")
// PutObjectPart
router.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
collectAPIStats("putobjectpart", maxClients(gz(httpTraceHdrs(api.PutObjectPartHandler))))).Queries("partNumber", "{partNumber:[0-9]+}", "uploadId", "{uploadId:.*}")
// ListObjectParts
router.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
collectAPIStats("listobjectparts", maxClients(gz(httpTraceAll(api.ListObjectPartsHandler))))).Queries("uploadId", "{uploadId:.*}")
// CompleteMultipartUpload
router.Methods(http.MethodPost).Path("/{object:.+}").HandlerFunc(
collectAPIStats("completemultipartupload", maxClients(gz(httpTraceAll(api.CompleteMultipartUploadHandler))))).Queries("uploadId", "{uploadId:.*}")
// NewMultipartUpload
router.Methods(http.MethodPost).Path("/{object:.+}").HandlerFunc(
collectAPIStats("newmultipartupload", maxClients(gz(httpTraceAll(api.NewMultipartUploadHandler))))).Queries("uploads", "")
// AbortMultipartUpload
router.Methods(http.MethodDelete).Path("/{object:.+}").HandlerFunc(
collectAPIStats("abortmultipartupload", maxClients(gz(httpTraceAll(api.AbortMultipartUploadHandler))))).Queries("uploadId", "{uploadId:.*}")
// GetObjectACL - this is a dummy call.
router.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
collectAPIStats("getobjectacl", maxClients(gz(httpTraceHdrs(api.GetObjectACLHandler))))).Queries("acl", "")
// PutObjectACL - this is a dummy call.
router.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
collectAPIStats("putobjectacl", maxClients(gz(httpTraceHdrs(api.PutObjectACLHandler))))).Queries("acl", "")
// GetObjectTagging
router.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
collectAPIStats("getobjecttagging", maxClients(gz(httpTraceHdrs(api.GetObjectTaggingHandler))))).Queries("tagging", "")
// PutObjectTagging
router.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
collectAPIStats("putobjecttagging", maxClients(gz(httpTraceHdrs(api.PutObjectTaggingHandler))))).Queries("tagging", "")
// DeleteObjectTagging
router.Methods(http.MethodDelete).Path("/{object:.+}").HandlerFunc(
collectAPIStats("deleteobjecttagging", maxClients(gz(httpTraceHdrs(api.DeleteObjectTaggingHandler))))).Queries("tagging", "")
// SelectObjectContent
router.Methods(http.MethodPost).Path("/{object:.+}").HandlerFunc(
collectAPIStats("selectobjectcontent", maxClients(gz(httpTraceHdrs(api.SelectObjectContentHandler))))).Queries("select", "").Queries("select-type", "2")
// GetObjectRetention
router.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
collectAPIStats("getobjectretention", maxClients(gz(httpTraceAll(api.GetObjectRetentionHandler))))).Queries("retention", "")
// GetObjectLegalHold
router.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
collectAPIStats("getobjectlegalhold", maxClients(gz(httpTraceAll(api.GetObjectLegalHoldHandler))))).Queries("legal-hold", "")
// GetObject - note gzip compression is *not* added due to Range requests.
router.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
collectAPIStats("getobject", maxClients(httpTraceHdrs(api.GetObjectHandler))))
// CopyObject
router.Methods(http.MethodPut).Path("/{object:.+}").HeadersRegexp(xhttp.AmzCopySource, ".*?(\\/|%2F).*?").HandlerFunc(
collectAPIStats("copyobject", maxClients(gz(httpTraceAll(api.CopyObjectHandler)))))
// PutObjectRetention
router.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
collectAPIStats("putobjectretention", maxClients(gz(httpTraceAll(api.PutObjectRetentionHandler))))).Queries("retention", "")
// PutObjectLegalHold
router.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
collectAPIStats("putobjectlegalhold", maxClients(gz(httpTraceAll(api.PutObjectLegalHoldHandler))))).Queries("legal-hold", "")
// PutObject with auto-extract support for zip
router.Methods(http.MethodPut).Path("/{object:.+}").HeadersRegexp(xhttp.AmzSnowballExtract, "true").HandlerFunc(
collectAPIStats("putobject", maxClients(gz(httpTraceHdrs(api.PutObjectExtractHandler)))))
// PutObject
router.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
collectAPIStats("putobject", maxClients(gz(httpTraceHdrs(api.PutObjectHandler)))))
// DeleteObject
router.Methods(http.MethodDelete).Path("/{object:.+}").HandlerFunc(
collectAPIStats("deleteobject", maxClients(gz(httpTraceAll(api.DeleteObjectHandler)))))
// PostRestoreObject
router.Methods(http.MethodPost).Path("/{object:.+}").HandlerFunc(
collectAPIStats("restoreobject", maxClients(gz(httpTraceAll(api.PostRestoreObjectHandler))))).Queries("restore", "")
// Bucket operations
// GetBucketLocation
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketlocation", maxClients(gz(httpTraceAll(api.GetBucketLocationHandler))))).Queries("location", "")
// GetBucketPolicy
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketpolicy", maxClients(gz(httpTraceAll(api.GetBucketPolicyHandler))))).Queries("policy", "")
// GetBucketLifecycle
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketlifecycle", maxClients(gz(httpTraceAll(api.GetBucketLifecycleHandler))))).Queries("lifecycle", "")
// GetBucketEncryption
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketencryption", maxClients(gz(httpTraceAll(api.GetBucketEncryptionHandler))))).Queries("encryption", "")
// GetBucketObjectLockConfig
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketobjectlockconfiguration", maxClients(gz(httpTraceAll(api.GetBucketObjectLockConfigHandler))))).Queries("object-lock", "")
// GetBucketReplicationConfig
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketreplicationconfiguration", maxClients(gz(httpTraceAll(api.GetBucketReplicationConfigHandler))))).Queries("replication", "")
// GetBucketVersioning
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketversioning", maxClients(gz(httpTraceAll(api.GetBucketVersioningHandler))))).Queries("versioning", "")
// GetBucketNotification
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketnotification", maxClients(gz(httpTraceAll(api.GetBucketNotificationHandler))))).Queries("notification", "")
// ListenNotification
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("listennotification", maxClients(gz(httpTraceAll(api.ListenNotificationHandler))))).Queries("events", "{events:.*}")
// Dummy Bucket Calls
// GetBucketACL -- this is a dummy call.
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketacl", maxClients(gz(httpTraceAll(api.GetBucketACLHandler))))).Queries("acl", "")
// PutBucketACL -- this is a dummy call.
router.Methods(http.MethodPut).HandlerFunc(
collectAPIStats("putbucketacl", maxClients(gz(httpTraceAll(api.PutBucketACLHandler))))).Queries("acl", "")
// GetBucketCors - this is a dummy call.
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketcors", maxClients(gz(httpTraceAll(api.GetBucketCorsHandler))))).Queries("cors", "")
// GetBucketWebsiteHandler - this is a dummy call.
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketwebsite", maxClients(gz(httpTraceAll(api.GetBucketWebsiteHandler))))).Queries("website", "")
// GetBucketAccelerateHandler - this is a dummy call.
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketaccelerate", maxClients(gz(httpTraceAll(api.GetBucketAccelerateHandler))))).Queries("accelerate", "")
// GetBucketRequestPaymentHandler - this is a dummy call.
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketrequestpayment", maxClients(gz(httpTraceAll(api.GetBucketRequestPaymentHandler))))).Queries("requestPayment", "")
// GetBucketLoggingHandler - this is a dummy call.
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketlogging", maxClients(gz(httpTraceAll(api.GetBucketLoggingHandler))))).Queries("logging", "")
// GetBucketTaggingHandler
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbuckettagging", maxClients(gz(httpTraceAll(api.GetBucketTaggingHandler))))).Queries("tagging", "")
// DeleteBucketWebsiteHandler
router.Methods(http.MethodDelete).HandlerFunc(
collectAPIStats("deletebucketwebsite", maxClients(gz(httpTraceAll(api.DeleteBucketWebsiteHandler))))).Queries("website", "")
// DeleteBucketTaggingHandler
router.Methods(http.MethodDelete).HandlerFunc(
collectAPIStats("deletebuckettagging", maxClients(gz(httpTraceAll(api.DeleteBucketTaggingHandler))))).Queries("tagging", "")
// ListMultipartUploads
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("listmultipartuploads", maxClients(gz(httpTraceAll(api.ListMultipartUploadsHandler))))).Queries("uploads", "")
// ListObjectsV2M
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("listobjectsv2M", maxClients(gz(httpTraceAll(api.ListObjectsV2MHandler))))).Queries("list-type", "2", "metadata", "true")
// ListObjectsV2
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("listobjectsv2", maxClients(gz(httpTraceAll(api.ListObjectsV2Handler))))).Queries("list-type", "2")
// ListObjectVersions
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("listobjectversions", maxClients(gz(httpTraceAll(api.ListObjectVersionsHandler))))).Queries("versions", "")
// GetBucketPolicyStatus
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getpolicystatus", maxClients(gz(httpTraceAll(api.GetBucketPolicyStatusHandler))))).Queries("policyStatus", "")
// PutBucketLifecycle
router.Methods(http.MethodPut).HandlerFunc(
collectAPIStats("putbucketlifecycle", maxClients(gz(httpTraceAll(api.PutBucketLifecycleHandler))))).Queries("lifecycle", "")
// PutBucketReplicationConfig
router.Methods(http.MethodPut).HandlerFunc(
collectAPIStats("putbucketreplicationconfiguration", maxClients(gz(httpTraceAll(api.PutBucketReplicationConfigHandler))))).Queries("replication", "")
// PutBucketEncryption
router.Methods(http.MethodPut).HandlerFunc(
collectAPIStats("putbucketencryption", maxClients(gz(httpTraceAll(api.PutBucketEncryptionHandler))))).Queries("encryption", "")
// PutBucketPolicy
router.Methods(http.MethodPut).HandlerFunc(
collectAPIStats("putbucketpolicy", maxClients(gz(httpTraceAll(api.PutBucketPolicyHandler))))).Queries("policy", "")
// PutBucketObjectLockConfig
router.Methods(http.MethodPut).HandlerFunc(
collectAPIStats("putbucketobjectlockconfig", maxClients(gz(httpTraceAll(api.PutBucketObjectLockConfigHandler))))).Queries("object-lock", "")
// PutBucketTaggingHandler
router.Methods(http.MethodPut).HandlerFunc(
collectAPIStats("putbuckettagging", maxClients(gz(httpTraceAll(api.PutBucketTaggingHandler))))).Queries("tagging", "")
// PutBucketVersioning
router.Methods(http.MethodPut).HandlerFunc(
collectAPIStats("putbucketversioning", maxClients(gz(httpTraceAll(api.PutBucketVersioningHandler))))).Queries("versioning", "")
// PutBucketNotification
router.Methods(http.MethodPut).HandlerFunc(
collectAPIStats("putbucketnotification", maxClients(gz(httpTraceAll(api.PutBucketNotificationHandler))))).Queries("notification", "")
// ResetBucketReplicationState - MinIO extension API
router.Methods(http.MethodPut).HandlerFunc(
collectAPIStats("resetbucketreplicationstate", maxClients(gz(httpTraceAll(api.ResetBucketReplicationStateHandler))))).Queries("replication-reset", "")
// PutBucket
router.Methods(http.MethodPut).HandlerFunc(
collectAPIStats("putbucket", maxClients(gz(httpTraceAll(api.PutBucketHandler)))))
// HeadBucket
router.Methods(http.MethodHead).HandlerFunc(
collectAPIStats("headbucket", maxClients(gz(httpTraceAll(api.HeadBucketHandler)))))
// PostPolicy
router.Methods(http.MethodPost).HeadersRegexp(xhttp.ContentType, "multipart/form-data*").HandlerFunc(
collectAPIStats("postpolicybucket", maxClients(gz(httpTraceHdrs(api.PostPolicyBucketHandler)))))
// DeleteMultipleObjects
router.Methods(http.MethodPost).HandlerFunc(
collectAPIStats("deletemultipleobjects", maxClients(gz(httpTraceAll(api.DeleteMultipleObjectsHandler))))).Queries("delete", "")
// DeleteBucketPolicy
router.Methods(http.MethodDelete).HandlerFunc(
collectAPIStats("deletebucketpolicy", maxClients(gz(httpTraceAll(api.DeleteBucketPolicyHandler))))).Queries("policy", "")
// DeleteBucketReplication
router.Methods(http.MethodDelete).HandlerFunc(
collectAPIStats("deletebucketreplicationconfiguration", maxClients(gz(httpTraceAll(api.DeleteBucketReplicationConfigHandler))))).Queries("replication", "")
// DeleteBucketLifecycle
router.Methods(http.MethodDelete).HandlerFunc(
collectAPIStats("deletebucketlifecycle", maxClients(gz(httpTraceAll(api.DeleteBucketLifecycleHandler))))).Queries("lifecycle", "")
// DeleteBucketEncryption
router.Methods(http.MethodDelete).HandlerFunc(
collectAPIStats("deletebucketencryption", maxClients(gz(httpTraceAll(api.DeleteBucketEncryptionHandler))))).Queries("encryption", "")
// DeleteBucket
router.Methods(http.MethodDelete).HandlerFunc(
collectAPIStats("deletebucket", maxClients(gz(httpTraceAll(api.DeleteBucketHandler)))))
// MinIO extension API for replication.
//
// GetBucketReplicationMetrics
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("getbucketreplicationmetrics", maxClients(gz(httpTraceAll(api.GetBucketReplicationMetricsHandler))))).Queries("replication-metrics", "")
// Register rejected bucket APIs
for _, r := range rejectedBucketAPIs {
router.Methods(r.methods...).
HandlerFunc(collectAPIStats(r.api, httpTraceAll(notImplementedHandler))).
Queries(r.queries...)
}
// S3 ListObjectsV1 (Legacy)
router.Methods(http.MethodGet).HandlerFunc(
collectAPIStats("listobjectsv1", maxClients(gz(httpTraceAll(api.ListObjectsV1Handler)))))
}
// Root operation
// ListenNotification
apiRouter.Methods(http.MethodGet).Path(SlashSeparator).HandlerFunc(
collectAPIStats("listennotification", maxClients(gz(httpTraceAll(api.ListenNotificationHandler))))).Queries("events", "{events:.*}")
// ListBuckets
apiRouter.Methods(http.MethodGet).Path(SlashSeparator).HandlerFunc(
collectAPIStats("listbuckets", maxClients(gz(httpTraceAll(api.ListBucketsHandler)))))
// S3 browser with signature v4 adds '//' for ListBuckets request, so rather
// than failing with UnknownAPIRequest we simply handle it for now.
apiRouter.Methods(http.MethodGet).Path(SlashSeparator + SlashSeparator).HandlerFunc(
collectAPIStats("listbuckets", maxClients(gz(httpTraceAll(api.ListBucketsHandler)))))
// If none of the routes match add default error handler routes
apiRouter.NotFoundHandler = collectAPIStats("notfound", httpTraceAll(errorResponseHandler))
apiRouter.MethodNotAllowedHandler = collectAPIStats("methodnotallowed", httpTraceAll(methodNotAllowedHandler("S3")))
}
// corsHandler handler for CORS (Cross Origin Resource Sharing)
func corsHandler(handler http.Handler) http.Handler {
commonS3Headers := []string{
xhttp.Date,
xhttp.ETag,
xhttp.ServerInfo,
xhttp.Connection,
xhttp.AcceptRanges,
xhttp.ContentRange,
xhttp.ContentEncoding,
xhttp.ContentLength,
xhttp.ContentType,
xhttp.ContentDisposition,
xhttp.LastModified,
xhttp.ContentLanguage,
xhttp.CacheControl,
xhttp.RetryAfter,
xhttp.AmzBucketRegion,
xhttp.Expires,
"X-Amz*",
"x-amz*",
"*",
}
return cors.New(cors.Options{
AllowOriginFunc: func(origin string) bool {
for _, allowedOrigin := range globalAPIConfig.getCorsAllowOrigins() {
if wildcard.MatchSimple(allowedOrigin, origin) {
return true
}
}
return false
},
AllowedMethods: []string{
http.MethodGet,
http.MethodPut,
http.MethodHead,
http.MethodPost,
http.MethodDelete,
http.MethodOptions,
http.MethodPatch,
},
AllowedHeaders: commonS3Headers,
ExposedHeaders: commonS3Headers,
AllowCredentials: true,
}).Handler(handler)
}