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