minio/cmd/crossdomain-xml-handler.go
Harshavardhana 069432566f update license change for MinIO
Signed-off-by: Harshavardhana <harsha@minio.io>
2021-04-23 11:58:53 -07:00

53 lines
2.4 KiB
Go

// 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 "net/http"
// Standard cross domain policy information located at https://s3.amazonaws.com/crossdomain.xml
const crossDomainXML = `<?xml version="1.0"?><!DOCTYPE cross-domain-policy SYSTEM "http://www.adobe.com/xml/dtds/cross-domain-policy.dtd"><cross-domain-policy><allow-access-from domain="*" secure="false" /></cross-domain-policy>`
// Standard path where an app would find cross domain policy information.
const crossDomainXMLEntity = "/crossdomain.xml"
// Cross domain policy implements http.Handler interface, implementing a custom ServerHTTP.
type crossDomainPolicy struct {
handler http.Handler
}
// A cross-domain policy file is an XML document that grants a web client, such as Adobe Flash Player
// or Adobe Acrobat (though not necessarily limited to these), permission to handle data across domains.
// When clients request content hosted on a particular source domain and that content make requests
// directed towards a domain other than its own, the remote domain needs to host a cross-domain
// policy file that grants access to the source domain, allowing the client to continue the transaction.
func setCrossDomainPolicy(h http.Handler) http.Handler {
return crossDomainPolicy{handler: h}
}
func (c crossDomainPolicy) ServeHTTP(w http.ResponseWriter, r *http.Request) {
// Look for 'crossdomain.xml' in the incoming request.
switch r.URL.Path {
case crossDomainXMLEntity:
// Write the standard cross domain policy xml.
w.Write([]byte(crossDomainXML))
// Request completed, no need to serve to other handlers.
return
}
// Continue to serve the request further.
c.handler.ServeHTTP(w, r)
}