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/*
* Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
* Copyright (C) 2009 Google Inc. All rights reserved.
* Copyright (C) 2011 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.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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.
*/
#pragma once
#include <wtf/HashSet.h>
#include <wtf/WallTime.h>
#include <wtf/text/StringHash.h>
namespace WebCore {
typedef UncheckedKeyHashSet<String, ASCIICaseInsensitiveHash> HTTPHeaderSet;
class ResourceResponse;
enum class HTTPHeaderName : uint16_t;
enum class XSSProtectionDisposition {
Invalid,
Disabled,
Enabled,
BlockEnabled,
};
enum class ContentTypeOptionsDisposition : bool {
None,
Nosniff
};
enum class XFrameOptionsDisposition : uint8_t {
None,
Deny,
SameOrigin,
AllowAll,
Invalid,
Conflict
};
enum class CrossOriginResourcePolicy : uint8_t {
None,
CrossOrigin,
SameOrigin,
SameSite,
Invalid
};
enum class ClearSiteDataValue : uint8_t {
Cache = 1 << 0,
Cookies = 1 << 1,
ExecutionContexts = 1 << 2,
Storage = 1 << 3,
};
enum class RangeAllowWhitespace : bool { No, Yes };
bool isValidReasonPhrase(const String&);
bool isValidHTTPHeaderValue(const String&);
bool isValidAcceptHeaderValue(const String&);
bool isValidLanguageHeaderValue(const String&);
#if USE(GLIB)
WEBCORE_EXPORT bool isValidUserAgentHeaderValue(const String&);
#endif
bool isValidHTTPToken(const String&);
bool isValidHTTPToken(StringView);
std::optional<WallTime> parseHTTPDate(const String&);
StringView filenameFromHTTPContentDisposition(StringView);
WEBCORE_EXPORT String extractMIMETypeFromMediaType(const String&);
WEBCORE_EXPORT StringView extractCharsetFromMediaType(StringView);
XSSProtectionDisposition parseXSSProtectionHeader(const String& header, String& failureReason, unsigned& failurePosition, String& reportURL);
AtomString extractReasonPhraseFromHTTPStatusLine(const String&);
WEBCORE_EXPORT XFrameOptionsDisposition parseXFrameOptionsHeader(StringView);
WEBCORE_EXPORT OptionSet<ClearSiteDataValue> parseClearSiteDataHeader(const ResourceResponse&);
// -1 could be set to one of the return parameters to indicate the value is not specified.
WEBCORE_EXPORT bool parseRange(StringView, RangeAllowWhitespace, long long& rangeStart, long long& rangeEnd);
ContentTypeOptionsDisposition parseContentTypeOptionsHeader(StringView header);
// Parsing Complete HTTP Messages.
size_t parseHTTPHeader(std::span<const uint8_t> data, String& failureReason, StringView& nameStr, String& valueStr, bool strict = true);
size_t parseHTTPRequestBody(std::span<const uint8_t> data, Vector<uint8_t>& body);
std::optional<uint64_t> parseContentLength(StringView);
// HTTP Header routine as per https://fetch.spec.whatwg.org/#terminology-headers
bool isForbiddenHeader(const String& name, StringView value);
bool isForbiddenHeaderName(const String&);
bool isNoCORSSafelistedRequestHeaderName(const String&);
bool isPriviledgedNoCORSRequestHeaderName(const String&);
bool isForbiddenResponseHeaderName(const String&);
bool isForbiddenMethod(StringView);
bool isSimpleHeader(const String& name, const String& value);
bool isCrossOriginSafeHeader(HTTPHeaderName, const HTTPHeaderSet&);
bool isCrossOriginSafeHeader(const String&, const HTTPHeaderSet&);
bool isCrossOriginSafeRequestHeader(HTTPHeaderName, const String&);
String normalizeHTTPMethod(const String&);
bool isSafeMethod(const String&);
WEBCORE_EXPORT CrossOriginResourcePolicy parseCrossOriginResourcePolicyHeader(StringView);
template<class HashType>
bool addToAccessControlAllowList(const String& string, unsigned start, unsigned end, UncheckedKeyHashSet<String, HashType>& set)
{
StringImpl* stringImpl = string.impl();
if (!stringImpl)
return true;
// Skip white space from start.
while (start <= end && isASCIIWhitespaceWithoutFF((*stringImpl)[start]))
++start;
// only white space
if (start > end)
return true;
// Skip white space from end.
while (end && isASCIIWhitespaceWithoutFF((*stringImpl)[end]))
--end;
auto token = string.substring(start, end - start + 1);
if (!isValidHTTPToken(token))
return false;
set.add(WTFMove(token));
return true;
}
template<class HashType = DefaultHash<String>>
std::optional<UncheckedKeyHashSet<String, HashType>> parseAccessControlAllowList(const String& string)
{
UncheckedKeyHashSet<String, HashType> set;
unsigned start = 0;
size_t end;
while ((end = string.find(',', start)) != notFound) {
if (start != end) {
if (!addToAccessControlAllowList(string, start, end - 1, set))
return { };
}
start = end + 1;
}
if (start != string.length()) {
if (!addToAccessControlAllowList(string, start, string.length() - 1, set))
return { };
}
return set;
}
}
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