mime_util.cc | Explore in Territory

// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "third_party/blink/public/common/mime_util/mime_util.h"

#include <stddef.h>

#include <unordered_set>

#include "base/containers/contains.h"
#include "base/containers/fixed_flat_set.h"
#include "base/strings/string_util.h"
#include "build/build_config.h"
#include "media/media_buildflags.h"
#include "net/base/mime_util.h"
#include "third_party/blink/public/common/buildflags.h"

#if !BUILDFLAG(IS_IOS)
// iOS doesn't use and must not depend on //media
#include "media/base/mime_util.h"
#endif

namespace blink {

namespace {

// From WebKit's WebCore/platform/MIMETypeRegistry.cpp:

constexpr auto kSupportedImageTypes = …;

//  Support every script type mentioned in the spec, as it notes that "User
//  agents must recognize all JavaScript MIME types." See
//  https://html.spec.whatwg.org/#javascript-mime-type.
constexpr auto kSupportedJavascriptTypes = …;

// These types are excluded from the logic that allows all text/ types because
// while they are technically text, it's very unlikely that a user expects to
// see them rendered in text form.
constexpr auto kUnsupportedTextTypes = …;

// Note:
// - does not include javascript types list (see supported_javascript_types)
// - does not include types starting with "text/" (see
//   IsSupportedNonImageMimeType())
constexpr auto kSupportedNonImageTypes = …;

}  // namespace

bool IsSupportedImageMimeType(std::string_view mime_type) { … }

bool IsSupportedNonImageMimeType(std::string_view mime_type) { … }

bool IsUnsupportedTextMimeType(std::string_view mime_type) { … }

bool IsSupportedJavascriptMimeType(std::string_view mime_type) { … }

// TODO(crbug.com/362282752): Allow non-application `*/*+json` MIME types.
// https://mimesniff.spec.whatwg.org/#json-mime-type
bool IsJSONMimeType(std::string_view mime_type) { … }

// TODO(crbug.com/362282752): Allow other `*/*+xml` MIME types.
// https://mimesniff.spec.whatwg.org/#xml-mime-type
bool IsXMLMimeType(std::string_view mime_type) { … }

// From step 3 of
// https://mimesniff.spec.whatwg.org/#minimize-a-supported-mime-type.
bool IsSVGMimeType(std::string_view mime_type) { … }

bool IsSupportedMimeType(std::string_view mime_type) { … }

}  // namespace blink
chromium/third_party/blink/common/mime_util/mime_util.cc
