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minio/cmd/routers.go

151 lines
4.5 KiB

/*
* Minio Cloud Storage, (C) 2015, 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 cmd
import (
"net/http"
router "github.com/gorilla/mux"
)
func newObjectLayerFn() ObjectLayer {
globalObjLayerMutex.Lock()
defer globalObjLayerMutex.Unlock()
return globalObjectAPI
}
// newObjectLayer - initialize any object layer depending on the number of disks.
func newObjectLayer(storageDisks []StorageAPI) (ObjectLayer, error) {
var objAPI ObjectLayer
var err error
if len(storageDisks) == 1 {
// Initialize FS object layer.
objAPI, err = newFSObjects(storageDisks[0])
} else {
// Initialize XL object layer.
objAPI, err = newXLObjects(storageDisks)
}
if err != nil {
return nil, err
}
// The following actions are performed here, so that any
// requests coming in early in the bootup sequence don't fail
// unexpectedly - e.g. if initEventNotifier was initialized
// after this function completes, an event could be generated
// before the notification system is ready, causing event
// drops or crashes.
// Migrate bucket policy from configDir to .minio.sys/buckets/
err = migrateBucketPolicyConfig(objAPI)
if err != nil {
errorIf(err, "Unable to migrate bucket policy from config directory")
return nil, err
}
err = cleanupOldBucketPolicyConfigs()
if err != nil {
errorIf(err, "Unable to clean up bucket policy from config directory.")
return nil, err
}
// Initialize and load bucket policies.
err = initBucketPolicies(objAPI)
fatalIf(err, "Unable to load all bucket policies.")
// Initialize a new event notifier.
err = initEventNotifier(objAPI)
fatalIf(err, "Unable to initialize event notification.")
// Success.
return objAPI, nil
}
// Composed function registering routers for only distributed XL setup.
func registerDistXLRouters(mux *router.Router, srvCmdConfig serverCmdConfig) error {
// Register storage rpc router only if its a distributed setup.
err := registerStorageRPCRouters(mux, srvCmdConfig)
if err != nil {
return err
}
// Register distributed namespace lock.
err = registerDistNSLockRouter(mux, srvCmdConfig)
if err != nil {
return err
}
// Register S3 peer communication router.
err = registerS3PeerRPCRouter(mux)
if err != nil {
return err
}
// Register RPC router for web related calls.
return registerBrowserPeerRPCRouter(mux)
}
// configureServer handler returns final handler for the http server.
func configureServerHandler(srvCmdConfig serverCmdConfig) (http.Handler, error) {
// Initialize router. `SkipClean(true)` stops gorilla/mux from
// normalizing URL path minio/minio#3256
mux := router.NewRouter().SkipClean(true)
// Initialize distributed NS lock.
if globalIsDistXL {
registerDistXLRouters(mux, srvCmdConfig)
}
// Register web router when its enabled.
if globalIsBrowserEnabled {
if err := registerWebRouter(mux); err != nil {
return nil, err
}
}
// Add API router.
registerAPIRouter(mux)
// List of some generic handlers which are applied for all incoming requests.
var handlerFns = []HandlerFunc{
// Limits all requests size to a maximum fixed limit
setRequestSizeLimitHandler,
// Adds 'crossdomain.xml' policy handler to serve legacy flash clients.
setCrossDomainPolicy,
// Redirect some pre-defined browser request paths to a static location prefix.
setBrowserRedirectHandler,
// Validates if incoming request is for restricted buckets.
setPrivateBucketHandler,
// Adds cache control for all browser requests.
setBrowserCacheControlHandler,
// Validates all incoming requests to have a valid date header.
setTimeValidityHandler,
// CORS setting for all browser API requests.
setCorsHandler,
// Validates all incoming URL resources, for invalid/unsupported
// resources client receives a HTTP error.
setIgnoreResourcesHandler,
// Auth handler verifies incoming authorization headers and
// routes them accordingly. Client receives a HTTP error for
// invalid/unsupported signatures.
setAuthHandler,
// Add new handlers here.
}
// Register rest of the handlers.
return registerHandlers(mux, handlerFns...), nil
}