| // Copyright (c) 2012 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 "components/drive/drive_api_util.h" |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include <string> |
| |
| #include "base/files/file.h" |
| #include "base/logging.h" |
| #include "base/macros.h" |
| #include "base/md5.h" |
| #include "base/strings/string16.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/synchronization/cancellation_flag.h" |
| #include "base/values.h" |
| #include "google_apis/drive/drive_api_parser.h" |
| #include "net/base/escape.h" |
| #include "net/base/net_errors.h" |
| #include "third_party/re2/src/re2/re2.h" |
| #include "url/gurl.h" |
| |
| namespace drive { |
| namespace util { |
| namespace { |
| |
| struct HostedDocumentKind { |
| const char* mime_type; |
| const char* extension; |
| }; |
| |
| const HostedDocumentKind kHostedDocumentKinds[] = { |
| {kGoogleDocumentMimeType, ".gdoc"}, |
| {kGoogleSpreadsheetMimeType, ".gsheet"}, |
| {kGooglePresentationMimeType, ".gslides"}, |
| {kGoogleDrawingMimeType, ".gdraw"}, |
| {kGoogleTableMimeType, ".gtable"}, |
| {kGoogleFormMimeType, ".gform"}, |
| {kGoogleMapMimeType, ".gmaps"}, |
| {kGoogleSiteMimeType, ".gsite"}, |
| }; |
| |
| const char kUnknownHostedDocumentExtension[] = ".glink"; |
| |
| const int kMd5DigestBufferSize = 512 * 1024; // 512 kB. |
| |
| } // namespace |
| |
| std::string EscapeQueryStringValue(const std::string& str) { |
| std::string result; |
| result.reserve(str.size()); |
| for (size_t i = 0; i < str.size(); ++i) { |
| if (str[i] == '\\' || str[i] == '\'') { |
| result.push_back('\\'); |
| } |
| result.push_back(str[i]); |
| } |
| return result; |
| } |
| |
| std::string TranslateQuery(const std::string& original_query) { |
| // In order to handle non-ascii white spaces correctly, convert to UTF16. |
| base::string16 query = base::UTF8ToUTF16(original_query); |
| const base::string16 kDelimiter( |
| base::kWhitespaceUTF16 + base::ASCIIToUTF16("\"")); |
| |
| std::string result; |
| for (size_t index = query.find_first_not_of(base::kWhitespaceUTF16); |
| index != base::string16::npos; |
| index = query.find_first_not_of(base::kWhitespaceUTF16, index)) { |
| bool is_exclusion = (query[index] == '-'); |
| if (is_exclusion) |
| ++index; |
| if (index == query.length()) { |
| // Here, the token is '-' and it should be ignored. |
| continue; |
| } |
| |
| size_t begin_token = index; |
| base::string16 token; |
| if (query[begin_token] == '"') { |
| // Quoted query. |
| ++begin_token; |
| size_t end_token = query.find('"', begin_token); |
| if (end_token == base::string16::npos) { |
| // This is kind of syntax error, since quoted string isn't finished. |
| // However, the query is built by user manually, so here we treat |
| // whole remaining string as a token as a fallback, by appending |
| // a missing double-quote character. |
| end_token = query.length(); |
| query.push_back('"'); |
| } |
| |
| token = query.substr(begin_token, end_token - begin_token); |
| index = end_token + 1; // Consume last '"', too. |
| } else { |
| size_t end_token = query.find_first_of(kDelimiter, begin_token); |
| if (end_token == base::string16::npos) { |
| end_token = query.length(); |
| } |
| |
| token = query.substr(begin_token, end_token - begin_token); |
| index = end_token; |
| } |
| |
| if (token.empty()) { |
| // Just ignore an empty token. |
| continue; |
| } |
| |
| if (!result.empty()) { |
| // If there are two or more tokens, need to connect with "and". |
| result.append(" and "); |
| } |
| |
| // The meaning of "fullText" should include title, description and content. |
| base::StringAppendF( |
| &result, |
| "%sfullText contains \'%s\'", |
| is_exclusion ? "not " : "", |
| EscapeQueryStringValue(base::UTF16ToUTF8(token)).c_str()); |
| } |
| |
| return result; |
| } |
| |
| std::string CanonicalizeResourceId(const std::string& resource_id) { |
| // If resource ID is in the old WAPI format starting with a prefix like |
| // "document:", strip it and return the remaining part. |
| std::string stripped_resource_id; |
| if (RE2::FullMatch(resource_id, "^[a-z-]+(?::|%3A)([\\w-]+)$", |
| &stripped_resource_id)) |
| return stripped_resource_id; |
| return resource_id; |
| } |
| |
| std::string GetMd5Digest(const base::FilePath& file_path, |
| const base::CancellationFlag* cancellation_flag) { |
| base::File file(file_path, base::File::FLAG_OPEN | base::File::FLAG_READ); |
| if (!file.IsValid()) |
| return std::string(); |
| |
| base::MD5Context context; |
| base::MD5Init(&context); |
| |
| int64_t offset = 0; |
| std::unique_ptr<char[]> buffer(new char[kMd5DigestBufferSize]); |
| while (true) { |
| if (cancellation_flag && cancellation_flag->IsSet()) { // Cancelled. |
| return std::string(); |
| } |
| int result = file.Read(offset, buffer.get(), kMd5DigestBufferSize); |
| if (result < 0) { |
| // Found an error. |
| return std::string(); |
| } |
| |
| if (result == 0) { |
| // End of file. |
| break; |
| } |
| |
| offset += result; |
| base::MD5Update(&context, base::StringPiece(buffer.get(), result)); |
| } |
| |
| base::MD5Digest digest; |
| base::MD5Final(&digest, &context); |
| return base::MD5DigestToBase16(digest); |
| } |
| |
| std::string GetHostedDocumentExtension(const std::string& mime_type) { |
| for (size_t i = 0; i < arraysize(kHostedDocumentKinds); ++i) { |
| if (mime_type == kHostedDocumentKinds[i].mime_type) |
| return kHostedDocumentKinds[i].extension; |
| } |
| return kUnknownHostedDocumentExtension; |
| } |
| |
| bool IsKnownHostedDocumentMimeType(const std::string& mime_type) { |
| for (size_t i = 0; i < arraysize(kHostedDocumentKinds); ++i) { |
| if (mime_type == kHostedDocumentKinds[i].mime_type) |
| return true; |
| } |
| return false; |
| } |
| |
| bool HasHostedDocumentExtension(const base::FilePath& path) { |
| const std::string extension = base::FilePath(path.Extension()).AsUTF8Unsafe(); |
| for (size_t i = 0; i < arraysize(kHostedDocumentKinds); ++i) { |
| if (extension == kHostedDocumentKinds[i].extension) |
| return true; |
| } |
| return extension == kUnknownHostedDocumentExtension; |
| } |
| |
| } // namespace util |
| } // namespace drive |