blob: f0f8b6afc8a8877957cac9baa028f43a9c920820 [file] [log] [blame]
/*
* Copyright (C) 2008 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "config.h"
#include "CrossOriginAccessControl.h"
#include "AtomicString.h"
#include "HTTPParsers.h"
#include "ResourceResponse.h"
#include "SecurityOrigin.h"
#include <wtf/Threading.h>
namespace WebCore {
bool isOnAccessControlSimpleRequestMethodWhitelist(const String& method)
{
return method == "GET" || method == "HEAD" || method == "POST";
}
bool isOnAccessControlSimpleRequestHeaderWhitelist(const String& name, const String& value)
{
if (equalIgnoringCase(name, "accept") || equalIgnoringCase(name, "accept-language") || equalIgnoringCase(name, "content-language"))
return true;
// Preflight is required for MIME types that can not be sent via form submission.
if (equalIgnoringCase(name, "content-type")) {
String mimeType = extractMIMETypeFromMediaType(value);
return equalIgnoringCase(mimeType, "application/x-www-form-urlencoded")
|| equalIgnoringCase(mimeType, "multipart/form-data")
|| equalIgnoringCase(mimeType, "text/plain");
}
return false;
}
bool isSimpleCrossOriginAccessRequest(const String& method, const HTTPHeaderMap& headerMap)
{
if (!isOnAccessControlSimpleRequestMethodWhitelist(method))
return false;
HTTPHeaderMap::const_iterator end = headerMap.end();
for (HTTPHeaderMap::const_iterator it = headerMap.begin(); it != end; ++it) {
if (!isOnAccessControlSimpleRequestHeaderWhitelist(it->first, it->second))
return false;
}
return true;
}
typedef HashSet<String, CaseFoldingHash> HTTPHeaderSet;
static HTTPHeaderSet* createAllowedCrossOriginResponseHeadersSet()
{
HTTPHeaderSet* headerSet = new HashSet<String, CaseFoldingHash>;
headerSet->add("cache-control");
headerSet->add("content-language");
headerSet->add("content-type");
headerSet->add("expires");
headerSet->add("last-modified");
headerSet->add("pragma");
return headerSet;
}
bool isOnAccessControlResponseHeaderWhitelist(const String& name)
{
AtomicallyInitializedStatic(HTTPHeaderSet*, allowedCrossOriginResponseHeaders = createAllowedCrossOriginResponseHeadersSet());
return allowedCrossOriginResponseHeaders->contains(name);
}
bool passesAccessControlCheck(const ResourceResponse& response, bool includeCredentials, SecurityOrigin* securityOrigin)
{
// A wildcard Access-Control-Allow-Origin can not be used if credentials are to be sent,
// even with Access-Control-Allow-Credentials set to true.
const String& accessControlOriginString = response.httpHeaderField("Access-Control-Allow-Origin");
if (accessControlOriginString == "*" && !includeCredentials)
return true;
RefPtr<SecurityOrigin> accessControlOrigin = SecurityOrigin::createFromString(accessControlOriginString);
if (!accessControlOrigin->isSameSchemeHostPort(securityOrigin))
return false;
if (includeCredentials) {
const String& accessControlCredentialsString = response.httpHeaderField("Access-Control-Allow-Credentials");
if (accessControlCredentialsString != "true")
return false;
}
return true;
}
} // namespace WebCore