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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "chrome/browser/android/offline_pages/offline_page_info_handler.h" |
| 6 |
| 7 #include "base/strings/string_util.h" |
| 8 #include "components/offline_pages/request_header/offline_page_header.h" |
| 9 #include "content/public/browser/navigation_entry.h" |
| 10 |
| 11 namespace offline_pages { |
| 12 |
| 13 namespace { |
| 14 const char kOfflinePageInfoKey[] = "offline"; |
| 15 } |
| 16 |
| 17 // static |
| 18 void OfflinePageInfoHandler::Register() { |
| 19 std::unique_ptr<OfflinePageInfoHandler> instance(new OfflinePageInfoHandler); |
| 20 sessions::SerializedNavigationDriver::Get()->RegisterExtendedInfoHandler( |
| 21 kOfflinePageInfoKey, std::move(instance)); |
| 22 } |
| 23 |
| 24 OfflinePageInfoHandler::OfflinePageInfoHandler() {} |
| 25 |
| 26 OfflinePageInfoHandler::~OfflinePageInfoHandler() {} |
| 27 |
| 28 std::string OfflinePageInfoHandler::GetExtendedInfo( |
| 29 const content::NavigationEntry& entry) const { |
| 30 std::string extra_headers = entry.GetExtraHeaders(); |
| 31 if (extra_headers.empty()) |
| 32 return std::string(); |
| 33 |
| 34 // The offline header will be the only extra header if it is present. |
| 35 std::string offline_header_key(offline_pages::kOfflinePageHeader); |
| 36 offline_header_key += ": "; |
| 37 if (!base::StartsWith(extra_headers, |
| 38 offline_header_key, |
| 39 base::CompareCase::INSENSITIVE_ASCII)) { |
| 40 return std::string(); |
| 41 } |
| 42 std::string header_value = extra_headers.substr(offline_header_key.length()); |
| 43 if (header_value.find("\n") != std::string::npos) |
| 44 return std::string(); |
| 45 |
| 46 OfflinePageHeader header(header_value); |
| 47 if (!header.need_to_persist) |
| 48 return std::string(); |
| 49 |
| 50 return header_value; |
| 51 } |
| 52 |
| 53 void OfflinePageInfoHandler::RestoreExtendedInfo( |
| 54 const std::string& info, content::NavigationEntry* entry) { |
| 55 OfflinePageHeader header(info); |
| 56 // Some sanity check. |
| 57 if (header.reason == OfflinePageHeader::Reason::NONE || |
| 58 !header.need_to_persist) |
| 59 return; |
| 60 entry->AddExtraHeaders(header.GetCompleteHeaderString()); |
| 61 } |
| 62 |
| 63 } // namespace offline_pages |
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