1 // Copyright 2014 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 "net/base/filename_util.h" 6 7 #include "base/bind.h" 8 #include "base/files/file_path.h" 9 #include "base/i18n/file_util_icu.h" 10 #include "base/strings/string16.h" 11 #include "net/base/filename_util_internal.h" 12 13 class GURL; 14 15 namespace net { 16 17 bool IsSafePortablePathComponent(const base::FilePath& component) { 18 base::string16 component16; 19 base::FilePath::StringType sanitized = component.value(); 20 SanitizeGeneratedFileName(&sanitized, true); 21 base::FilePath::StringType extension = component.Extension(); 22 if (!extension.empty()) 23 extension.erase(extension.begin()); // Erase preceding '.'. 24 return !component.empty() && (component == component.BaseName()) && 25 (component == component.StripTrailingSeparators()) && 26 FilePathToString16(component, &component16) && 27 base::i18n::IsFilenameLegal(component16) && 28 !IsShellIntegratedExtension(extension) && 29 (sanitized == component.value()) && !IsReservedName(component.value()); 30 } 31 32 bool IsSafePortableRelativePath(const base::FilePath& path) { 33 if (path.empty() || path.IsAbsolute() || path.EndsWithSeparator()) 34 return false; 35 std::vector<base::FilePath::StringType> components; 36 path.GetComponents(&components); 37 if (components.empty()) 38 return false; 39 for (size_t i = 0; i < components.size() - 1; ++i) { 40 if (!IsSafePortablePathComponent(base::FilePath(components[i]))) 41 return false; 42 } 43 return IsSafePortablePathComponent(path.BaseName()); 44 } 45 46 base::string16 GetSuggestedFilename(const GURL& url, 47 const std::string& content_disposition, 48 const std::string& referrer_charset, 49 const std::string& suggested_name, 50 const std::string& mime_type, 51 const std::string& default_name) { 52 return GetSuggestedFilenameImpl( 53 url, 54 content_disposition, 55 referrer_charset, 56 suggested_name, 57 mime_type, 58 default_name, 59 base::Bind(&base::i18n::ReplaceIllegalCharactersInPath)); 60 } 61 62 base::FilePath GenerateFileName(const GURL& url, 63 const std::string& content_disposition, 64 const std::string& referrer_charset, 65 const std::string& suggested_name, 66 const std::string& mime_type, 67 const std::string& default_file_name) { 68 base::FilePath generated_name(GenerateFileNameImpl( 69 url, 70 content_disposition, 71 referrer_charset, 72 suggested_name, 73 mime_type, 74 default_file_name, 75 base::Bind(&base::i18n::ReplaceIllegalCharactersInPath))); 76 77 #if defined(OS_CHROMEOS) 78 // When doing file manager operations on ChromeOS, the file paths get 79 // normalized in WebKit layer, so let's ensure downloaded files have 80 // normalized names. Otherwise, we won't be able to handle files with NFD 81 // utf8 encoded characters in name. 82 base::i18n::NormalizeFileNameEncoding(&generated_name); 83 #endif 84 85 DCHECK(!generated_name.empty()); 86 87 return generated_name; 88 } 89 90 } // namespace net 91
