| // Copyright 2020 The Chromium Authors. All rights reserved. |
| // 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/custom_handlers/protocol_handler_utils.h" |
| |
| #include "base/containers/contains.h" |
| #include "base/strings/string_piece.h" |
| #include "base/strings/string_util.h" |
| |
| namespace blink { |
| |
| bool IsValidCustomHandlerScheme(const base::StringPiece scheme, |
| bool allow_ext_prefix, |
| bool& has_custom_scheme_prefix) { |
| has_custom_scheme_prefix = false; |
| |
| static constexpr const char kWebPrefix[] = "web+"; |
| static constexpr const char kExtPrefix[] = "ext+"; |
| DCHECK_EQ(base::size(kWebPrefix), base::size(kExtPrefix)); |
| static constexpr const size_t kPrefixLength = base::size(kWebPrefix) - 1; |
| if (base::StartsWith(scheme, kWebPrefix, |
| base::CompareCase::INSENSITIVE_ASCII) || |
| (allow_ext_prefix && |
| base::StartsWith(scheme, kExtPrefix, |
| base::CompareCase::INSENSITIVE_ASCII))) { |
| has_custom_scheme_prefix = true; |
| // HTML5 requires that schemes with the |web+| prefix contain one or more |
| // ASCII alphas after that prefix. |
| auto scheme_name = scheme.substr(kPrefixLength); |
| if (scheme_name.empty()) |
| return false; |
| for (auto& character : scheme_name) { |
| if (!base::IsAsciiAlpha(character)) |
| return false; |
| } |
| return true; |
| } |
| |
| static constexpr const char* const kProtocolSafelist[] = { |
| "bitcoin", "cabal", "dat", "did", "doi", "dweb", "ethereum", |
| "geo", "hyper", "im", "ipfs", "ipns", "irc", "ircs", |
| "magnet", "mailto", "matrix", "mms", "news", "nntp", "openpgp4fpr", |
| "sip", "sms", "smsto", "ssb", "ssh", "tel", "urn", |
| "webcal", "wtai", "xmpp"}; |
| return base::Contains(kProtocolSafelist, base::ToLowerASCII(scheme)); |
| } |
| |
| } // namespace blink |
