// Copyright 2014 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 "net/base/filename_util.h"

#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/test/test_file_util.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "url/gurl.h"

namespace net {

namespace {

struct FileCase {
  const wchar_t* file;
  const char* url;
};

struct GenerateFilenameCase {
  int lineno;
  const char* url;
  const char* content_disp_header;
  const char* referrer_charset;
  const char* suggested_filename;
  const char* mime_type;
  const wchar_t* default_filename;
  const wchar_t* expected_filename;
};

// The expected filenames are coded as wchar_t for convenience.
std::wstring FilePathAsWString(const base::FilePath& path) {
#if defined(OS_WIN)
  return path.value();
#else
  return base::UTF8ToWide(path.value());
#endif
}
base::FilePath WStringAsFilePath(const std::wstring& str) {
#if defined(OS_WIN)
  return base::FilePath(str);
#else
  return base::FilePath(base::WideToUTF8(str));
#endif
}

void RunGenerateFileNameTestCase(const GenerateFilenameCase* test_case) {
  std::string default_filename(base::WideToUTF8(test_case->default_filename));
  base::FilePath file_path = GenerateFileName(
      GURL(test_case->url), test_case->content_disp_header,
      test_case->referrer_charset, test_case->suggested_filename,
      test_case->mime_type, default_filename);
  EXPECT_EQ(test_case->expected_filename, FilePathAsWString(file_path))
      << "test case at line number: " << test_case->lineno;
}

}  // namespace

static const base::FilePath::CharType* kSafePortableBasenames[] = {
  FILE_PATH_LITERAL("a"),
  FILE_PATH_LITERAL("a.txt"),
  FILE_PATH_LITERAL("a b.txt"),
  FILE_PATH_LITERAL("a-b.txt"),
  FILE_PATH_LITERAL("My Computer"),
  FILE_PATH_LITERAL(" Computer"),
};

static const base::FilePath::CharType* kUnsafePortableBasenames[] = {
  FILE_PATH_LITERAL(""),
  FILE_PATH_LITERAL("."),
  FILE_PATH_LITERAL(".."),
  FILE_PATH_LITERAL("..."),
  FILE_PATH_LITERAL("con"),
  FILE_PATH_LITERAL("con.zip"),
  FILE_PATH_LITERAL("NUL"),
  FILE_PATH_LITERAL("NUL.zip"),
  FILE_PATH_LITERAL(".a"),
  FILE_PATH_LITERAL("a."),
  FILE_PATH_LITERAL("a\"a"),
  FILE_PATH_LITERAL("a<a"),
  FILE_PATH_LITERAL("a>a"),
  FILE_PATH_LITERAL("a?a"),
  FILE_PATH_LITERAL("a/"),
  FILE_PATH_LITERAL("a\\"),
  FILE_PATH_LITERAL("a "),
  FILE_PATH_LITERAL("a . ."),
  FILE_PATH_LITERAL("My Computer.{a}"),
  FILE_PATH_LITERAL("My Computer.{20D04FE0-3AEA-1069-A2D8-08002B30309D}"),
#if !defined(OS_WIN)
  FILE_PATH_LITERAL("a\\a"),
#endif
};

static const base::FilePath::CharType* kSafePortableRelativePaths[] = {
  FILE_PATH_LITERAL("a/a"),
#if defined(OS_WIN)
  FILE_PATH_LITERAL("a\\a"),
#endif
};

TEST(FilenameUtilTest, IsSafePortablePathComponent) {
  for (size_t i = 0 ; i < arraysize(kSafePortableBasenames); ++i) {
    EXPECT_TRUE(IsSafePortablePathComponent(base::FilePath(
        kSafePortableBasenames[i]))) << kSafePortableBasenames[i];
  }
  for (size_t i = 0 ; i < arraysize(kUnsafePortableBasenames); ++i) {
    EXPECT_FALSE(IsSafePortablePathComponent(base::FilePath(
        kUnsafePortableBasenames[i]))) << kUnsafePortableBasenames[i];
  }
  for (size_t i = 0 ; i < arraysize(kSafePortableRelativePaths); ++i) {
    EXPECT_FALSE(IsSafePortablePathComponent(base::FilePath(
        kSafePortableRelativePaths[i]))) << kSafePortableRelativePaths[i];
  }
}

TEST(FilenameUtilTest, IsSafePortableRelativePath) {
  base::FilePath safe_dirname(FILE_PATH_LITERAL("a"));
  for (size_t i = 0 ; i < arraysize(kSafePortableBasenames); ++i) {
    EXPECT_TRUE(IsSafePortableRelativePath(base::FilePath(
        kSafePortableBasenames[i]))) << kSafePortableBasenames[i];
    EXPECT_TRUE(IsSafePortableRelativePath(safe_dirname.Append(base::FilePath(
        kSafePortableBasenames[i])))) << kSafePortableBasenames[i];
  }
  for (size_t i = 0 ; i < arraysize(kSafePortableRelativePaths); ++i) {
    EXPECT_TRUE(IsSafePortableRelativePath(base::FilePath(
        kSafePortableRelativePaths[i]))) << kSafePortableRelativePaths[i];
    EXPECT_TRUE(IsSafePortableRelativePath(safe_dirname.Append(base::FilePath(
        kSafePortableRelativePaths[i])))) << kSafePortableRelativePaths[i];
  }
  for (size_t i = 0 ; i < arraysize(kUnsafePortableBasenames); ++i) {
    EXPECT_FALSE(IsSafePortableRelativePath(base::FilePath(
        kUnsafePortableBasenames[i]))) << kUnsafePortableBasenames[i];
    if (!base::FilePath::StringType(kUnsafePortableBasenames[i]).empty()) {
      EXPECT_FALSE(IsSafePortableRelativePath(safe_dirname.Append(
          base::FilePath(kUnsafePortableBasenames[i]))))
        << kUnsafePortableBasenames[i];
    }
  }
}

TEST(FilenameUtilTest, FileURLConversion) {
  // a list of test file names and the corresponding URLs
  const FileCase round_trip_cases[] = {
#if defined(OS_WIN)
    {L"C:\\foo\\bar.txt", "file:///C:/foo/bar.txt"},
    {L"\\\\some computer\\foo\\bar.txt",
     "file://some%20computer/foo/bar.txt"}, // UNC
    {L"D:\\Name;with%some symbols*#",
     "file:///D:/Name%3Bwith%25some%20symbols*%23"},
    // issue 14153: To be tested with the OS default codepage other than 1252.
    {L"D:\\latin1\\caf\x00E9\x00DD.txt",
     "file:///D:/latin1/caf%C3%A9%C3%9D.txt"},
    {L"D:\\otherlatin\\caf\x0119.txt",
     "file:///D:/otherlatin/caf%C4%99.txt"},
    {L"D:\\greek\\\x03B1\x03B2\x03B3.txt",
     "file:///D:/greek/%CE%B1%CE%B2%CE%B3.txt"},
    {L"D:\\Chinese\\\x6240\x6709\x4e2d\x6587\x7f51\x9875.doc",
     "file:///D:/Chinese/%E6%89%80%E6%9C%89%E4%B8%AD%E6%96%87%E7%BD%91"
         "%E9%A1%B5.doc"},
    {L"D:\\plane1\\\xD835\xDC00\xD835\xDC01.txt",  // Math alphabet "AB"
     "file:///D:/plane1/%F0%9D%90%80%F0%9D%90%81.txt"},
#elif defined(OS_POSIX)
    {L"/foo/bar.txt", "file:///foo/bar.txt"},
    {L"/foo/BAR.txt", "file:///foo/BAR.txt"},
    {L"/C:/foo/bar.txt", "file:///C:/foo/bar.txt"},
    {L"/foo/bar?.txt", "file:///foo/bar%3F.txt"},
    {L"/some computer/foo/bar.txt", "file:///some%20computer/foo/bar.txt"},
    {L"/Name;with%some symbols*#", "file:///Name%3Bwith%25some%20symbols*%23"},
    {L"/latin1/caf\x00E9\x00DD.txt", "file:///latin1/caf%C3%A9%C3%9D.txt"},
    {L"/otherlatin/caf\x0119.txt", "file:///otherlatin/caf%C4%99.txt"},
    {L"/greek/\x03B1\x03B2\x03B3.txt", "file:///greek/%CE%B1%CE%B2%CE%B3.txt"},
    {L"/Chinese/\x6240\x6709\x4e2d\x6587\x7f51\x9875.doc",
     "file:///Chinese/%E6%89%80%E6%9C%89%E4%B8%AD%E6%96%87%E7%BD"
         "%91%E9%A1%B5.doc"},
    {L"/plane1/\x1D400\x1D401.txt",  // Math alphabet "AB"
     "file:///plane1/%F0%9D%90%80%F0%9D%90%81.txt"},
#endif
  };

  // First, we'll test that we can round-trip all of the above cases of URLs
  base::FilePath output;
  for (size_t i = 0; i < arraysize(round_trip_cases); i++) {
    // convert to the file URL
    GURL file_url(FilePathToFileURL(
                      WStringAsFilePath(round_trip_cases[i].file)));
    EXPECT_EQ(round_trip_cases[i].url, file_url.spec());

    // Back to the filename.
    EXPECT_TRUE(FileURLToFilePath(file_url, &output));
    EXPECT_EQ(round_trip_cases[i].file, FilePathAsWString(output));
  }

  // Test that various file: URLs get decoded into the correct file type
  FileCase url_cases[] = {
#if defined(OS_WIN)
    {L"C:\\foo\\bar.txt", "file:c|/foo\\bar.txt"},
    {L"C:\\foo\\bar.txt", "file:/c:/foo/bar.txt"},
    {L"\\\\foo\\bar.txt", "file://foo\\bar.txt"},
    {L"C:\\foo\\bar.txt", "file:///c:/foo/bar.txt"},
    {L"\\\\foo\\bar.txt", "file:////foo\\bar.txt"},
    {L"\\\\foo\\bar.txt", "file:/foo/bar.txt"},
    {L"\\\\foo\\bar.txt", "file://foo\\bar.txt"},
    {L"C:\\foo\\bar.txt", "file:\\\\\\c:/foo/bar.txt"},
#elif defined(OS_POSIX)
    {L"/c:/foo/bar.txt", "file:/c:/foo/bar.txt"},
    {L"/c:/foo/bar.txt", "file:///c:/foo/bar.txt"},
    {L"/foo/bar.txt", "file:/foo/bar.txt"},
    {L"/c:/foo/bar.txt", "file:\\\\\\c:/foo/bar.txt"},
    {L"/foo/bar.txt", "file:foo/bar.txt"},
    {L"/bar.txt", "file://foo/bar.txt"},
    {L"/foo/bar.txt", "file:///foo/bar.txt"},
    {L"/foo/bar.txt", "file:////foo/bar.txt"},
    {L"/foo/bar.txt", "file:////foo//bar.txt"},
    {L"/foo/bar.txt", "file:////foo///bar.txt"},
    {L"/foo/bar.txt", "file:////foo////bar.txt"},
    {L"/c:/foo/bar.txt", "file:\\\\\\c:/foo/bar.txt"},
    {L"/c:/foo/bar.txt", "file:c:/foo/bar.txt"},
    // We get these wrong because GURL turns back slashes into forward
    // slashes.
    //{L"/foo%5Cbar.txt", "file://foo\\bar.txt"},
    //{L"/c|/foo%5Cbar.txt", "file:c|/foo\\bar.txt"},
    //{L"/foo%5Cbar.txt", "file://foo\\bar.txt"},
    //{L"/foo%5Cbar.txt", "file:////foo\\bar.txt"},
    //{L"/foo%5Cbar.txt", "file://foo\\bar.txt"},
#endif
  };
  for (size_t i = 0; i < arraysize(url_cases); i++) {
    FileURLToFilePath(GURL(url_cases[i].url), &output);
    EXPECT_EQ(url_cases[i].file, FilePathAsWString(output));
  }

  // Unfortunately, UTF8ToWide discards invalid UTF8 input.
#ifdef BUG_878908_IS_FIXED
  // Test that no conversion happens if the UTF-8 input is invalid, and that
  // the input is preserved in UTF-8
  const char invalid_utf8[] = "file:///d:/Blah/\xff.doc";
  const wchar_t invalid_wide[] = L"D:\\Blah\\\xff.doc";
  EXPECT_TRUE(FileURLToFilePath(
      GURL(std::string(invalid_utf8)), &output));
  EXPECT_EQ(std::wstring(invalid_wide), output);
#endif

  // Test that if a file URL is malformed, we get a failure
  EXPECT_FALSE(FileURLToFilePath(GURL("filefoobar"), &output));
}

#if defined(OS_WIN)
#define JPEG_EXT L".jpg"
#define HTML_EXT L".htm"
#elif defined(OS_MACOSX)
#define JPEG_EXT L".jpeg"
#define HTML_EXT L".html"
#else
#define JPEG_EXT L".jpg"
#define HTML_EXT L".html"
#endif
#define TXT_EXT L".txt"
#define TAR_EXT L".tar"

TEST(FilenameUtilTest, GenerateSafeFileName) {
  const struct {
    const char* mime_type;
    const base::FilePath::CharType* filename;
    const base::FilePath::CharType* expected_filename;
  } safe_tests[] = {
#if defined(OS_WIN)
    {
      "text/html",
      FILE_PATH_LITERAL("C:\\foo\\bar.htm"),
      FILE_PATH_LITERAL("C:\\foo\\bar.htm")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("C:\\foo\\bar.html"),
      FILE_PATH_LITERAL("C:\\foo\\bar.html")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("C:\\foo\\bar"),
      FILE_PATH_LITERAL("C:\\foo\\bar.htm")
    },
    {
      "image/png",
      FILE_PATH_LITERAL("C:\\bar.html"),
      FILE_PATH_LITERAL("C:\\bar.html")
    },
    {
      "image/png",
      FILE_PATH_LITERAL("C:\\bar"),
      FILE_PATH_LITERAL("C:\\bar.png")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("C:\\foo\\bar.exe"),
      FILE_PATH_LITERAL("C:\\foo\\bar.exe")
    },
    {
      "image/gif",
      FILE_PATH_LITERAL("C:\\foo\\bar.exe"),
      FILE_PATH_LITERAL("C:\\foo\\bar.exe")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("C:\\foo\\google.com"),
      FILE_PATH_LITERAL("C:\\foo\\google.com")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("C:\\foo\\con.htm"),
      FILE_PATH_LITERAL("C:\\foo\\_con.htm")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("C:\\foo\\con"),
      FILE_PATH_LITERAL("C:\\foo\\_con.htm")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("C:\\foo\\harmless.{not-really-this-may-be-a-guid}"),
      FILE_PATH_LITERAL("C:\\foo\\harmless.download")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("C:\\foo\\harmless.local"),
      FILE_PATH_LITERAL("C:\\foo\\harmless.download")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("C:\\foo\\harmless.lnk"),
      FILE_PATH_LITERAL("C:\\foo\\harmless.download")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("C:\\foo\\harmless.{mismatched-"),
      FILE_PATH_LITERAL("C:\\foo\\harmless.{mismatched-")
    },
    // Allow extension synonyms.
    {
      "image/jpeg",
      FILE_PATH_LITERAL("C:\\foo\\bar.jpg"),
      FILE_PATH_LITERAL("C:\\foo\\bar.jpg")
    },
    {
      "image/jpeg",
      FILE_PATH_LITERAL("C:\\foo\\bar.jpeg"),
      FILE_PATH_LITERAL("C:\\foo\\bar.jpeg")
    },
#else  // !defined(OS_WIN)
    {
      "text/html",
      FILE_PATH_LITERAL("/foo/bar.htm"),
      FILE_PATH_LITERAL("/foo/bar.htm")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("/foo/bar.html"),
      FILE_PATH_LITERAL("/foo/bar.html")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("/foo/bar"),
      FILE_PATH_LITERAL("/foo/bar.html")
    },
    {
      "image/png",
      FILE_PATH_LITERAL("/bar.html"),
      FILE_PATH_LITERAL("/bar.html")
    },
    {
      "image/png",
      FILE_PATH_LITERAL("/bar"),
      FILE_PATH_LITERAL("/bar.png")
    },
    {
      "image/gif",
      FILE_PATH_LITERAL("/foo/bar.exe"),
      FILE_PATH_LITERAL("/foo/bar.exe")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("/foo/google.com"),
      FILE_PATH_LITERAL("/foo/google.com")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("/foo/con.htm"),
      FILE_PATH_LITERAL("/foo/con.htm")
    },
    {
      "text/html",
      FILE_PATH_LITERAL("/foo/con"),
      FILE_PATH_LITERAL("/foo/con.html")
    },
    // Allow extension synonyms.
    {
      "image/jpeg",
      FILE_PATH_LITERAL("/bar.jpg"),
      FILE_PATH_LITERAL("/bar.jpg")
    },
    {
      "image/jpeg",
      FILE_PATH_LITERAL("/bar.jpeg"),
      FILE_PATH_LITERAL("/bar.jpeg")
    },
#endif  // !defined(OS_WIN)
  };

  for (size_t i = 0; i < arraysize(safe_tests); ++i) {
    base::FilePath file_path(safe_tests[i].filename);
    GenerateSafeFileName(safe_tests[i].mime_type, false, &file_path);
    EXPECT_EQ(safe_tests[i].expected_filename, file_path.value())
        << "Iteration " << i;
  }
}

TEST(FilenameUtilTest, GenerateFileName) {
#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
  // This test doesn't run when the locale is not UTF-8 because some of the
  // string conversions fail. This is OK (we have the default value) but they
  // don't match our expectations.
  std::string locale = setlocale(LC_CTYPE, NULL);
  base::StringToLowerASCII(&locale);
  EXPECT_TRUE(locale.find("utf-8") != std::string::npos ||
              locale.find("utf8") != std::string::npos)
      << "Your locale (" << locale << ") must be set to UTF-8 "
      << "for this test to pass!";
#endif

  // Tests whether the correct filename is selected from the the given
  // parameters and that Content-Disposition headers are properly
  // handled including failovers when the header is malformed.
  const GenerateFilenameCase selection_tests[] = {
    {
      __LINE__,
      "http://www.google.com/",
      "attachment; filename=test.html",
      "",
      "",
      "",
      L"",
      L"test.html"
    },
    {
      __LINE__,
      "http://www.google.com/",
      "attachment; filename=\"test.html\"",
      "",
      "",
      "",
      L"",
      L"test.html"
    },
    {
      __LINE__,
      "http://www.google.com/",
      "attachment; filename= \"test.html\"",
      "",
      "",
      "",
      L"",
      L"test.html"
    },
    {
      __LINE__,
      "http://www.google.com/",
      "attachment; filename   =   \"test.html\"",
      "",
      "",
      "",
      L"",
      L"test.html"
    },
    { // filename is whitespace.  Should failover to URL host
      __LINE__,
      "http://www.google.com/",
      "attachment; filename=  ",
      "",
      "",
      "",
      L"",
      L"www.google.com"
    },
    { // No filename.
      __LINE__,
      "http://www.google.com/path/test.html",
      "attachment",
      "",
      "",
      "",
      L"",
      L"test.html"
    },
    { // Ditto
      __LINE__,
      "http://www.google.com/path/test.html",
      "attachment;",
      "",
      "",
      "",
      L"",
      L"test.html"
    },
    { // No C-D
      __LINE__,
      "http://www.google.com/",
      "",
      "",
      "",
      "",
      L"",
      L"www.google.com"
    },
    {
      __LINE__,
      "http://www.google.com/test.html",
      "",
      "",
      "",
      "",
      L"",
      L"test.html"
    },
    { // Now that we use src/url's ExtractFileName, this case falls back to
      // the hostname. If this behavior is not desirable, we'd better change
      // ExtractFileName (in url_parse.cc).
      __LINE__,
      "http://www.google.com/path/",
      "",
      "",
      "",
      "",
      L"",
      L"www.google.com"
    },
    {
      __LINE__,
      "http://www.google.com/path",
      "",
      "",
      "",
      "",
      L"",
      L"path"
    },
    {
      __LINE__,
      "file:///",
      "",
      "",
      "",
      "",
      L"",
      L"download"
    },
    {
      __LINE__,
      "file:///path/testfile",
      "",
      "",
      "",
      "",
      L"",
      L"testfile"
    },
    {
      __LINE__,
      "non-standard-scheme:",
      "",
      "",
      "",
      "",
      L"",
      L"download"
    },
    { // C-D should override default
      __LINE__,
      "http://www.google.com/",
      "attachment; filename =\"test.html\"",
      "",
      "",
      "",
      L"download",
      L"test.html"
    },
    { // But the URL shouldn't
      __LINE__,
      "http://www.google.com/",
      "",
      "",
      "",
      "",
      L"download",
      L"download"
    },
    {
      __LINE__,
      "http://www.google.com/",
      "attachment; filename=\"../test.html\"",
      "",
      "",
      "",
      L"",
      L"-test.html"
    },
    {
      __LINE__,
      "http://www.google.com/",
      "attachment; filename=\"..\\test.html\"",
      "",
      "",
      "",
      L"",
      L"test.html"
    },
    {
      __LINE__,
      "http://www.google.com/",
      "attachment; filename=\"..\\\\test.html\"",
      "",
      "",
      "",
      L"",
      L"-test.html"
    },
    { // Filename disappears after leading and trailing periods are removed.
      __LINE__,
      "http://www.google.com/",
      "attachment; filename=\"..\"",
      "",
      "",
      "",
      L"default",
      L"default"
    },
    { // C-D specified filename disappears.  Failover to final filename.
      __LINE__,
      "http://www.google.com/test.html",
      "attachment; filename=\"..\"",
      "",
      "",
      "",
      L"default",
      L"default"
    },
    // Below is a small subset of cases taken from HttpContentDisposition tests.
    {
      __LINE__,
      "http://www.google.com/",
      "attachment; filename=\"%EC%98%88%EC%88%A0%20"
      "%EC%98%88%EC%88%A0.jpg\"",
      "",
      "",
      "",
      L"",
      L"\uc608\uc220 \uc608\uc220.jpg"
    },
    {
      __LINE__,
      "http://www.google.com/%EC%98%88%EC%88%A0%20%EC%98%88%EC%88%A0.jpg",
      "",
      "",
      "",
      "",
      L"download",
      L"\uc608\uc220 \uc608\uc220.jpg"
    },
    {
      __LINE__,
      "http://www.google.com/",
      "attachment;",
      "",
      "",
      "",
      L"\uB2E4\uC6B4\uB85C\uB4DC",
      L"\uB2E4\uC6B4\uB85C\uB4DC"
    },
    {
      __LINE__,
      "http://www.google.com/",
      "attachment; filename=\"=?EUC-JP?Q?=B7=DD=BD="
      "D13=2Epng?=\"",
      "",
      "",
      "",
      L"download",
      L"\u82b8\u88533.png"
    },
    {
      __LINE__,
      "http://www.example.com/images?id=3",
      "attachment; filename=caf\xc3\xa9.png",
      "iso-8859-1",
      "",
      "",
      L"",
      L"caf\u00e9.png"
    },
    {
      __LINE__,
      "http://www.example.com/images?id=3",
      "attachment; filename=caf\xe5.png",
      "windows-1253",
      "",
      "",
      L"",
      L"caf\u03b5.png"
    },
    {
      __LINE__,
      "http://www.example.com/file?id=3",
      "attachment; name=\xcf\xc2\xd4\xd8.zip",
      "GBK",
      "",
      "",
      L"",
      L"\u4e0b\u8f7d.zip"
    },
    { // Invalid C-D header. Extracts filename from url.
      __LINE__,
      "http://www.google.com/test.html",
      "attachment; filename==?iiso88591?Q?caf=EG?=",
      "",
      "",
      "",
      L"",
      L"test.html"
    },
    // about: and data: URLs
    {
      __LINE__,
      "about:chrome",
      "",
      "",
      "",
      "",
      L"",
      L"download"
    },
    {
      __LINE__,
      "data:,looks/like/a.path",
      "",
      "",
      "",
      "",
      L"",
      L"download"
    },
    {
      __LINE__,
      "data:text/plain;base64,VG8gYmUgb3Igbm90IHRvIGJlLg=",
      "",
      "",
      "",
      "",
      L"",
      L"download"
    },
    {
      __LINE__,
      "data:,looks/like/a.path",
      "",
      "",
      "",
      "",
      L"default_filename_is_given",
      L"default_filename_is_given"
    },
    {
      __LINE__,
      "data:,looks/like/a.path",
      "",
      "",
      "",
      "",
      L"\u65e5\u672c\u8a9e",  // Japanese Kanji.
      L"\u65e5\u672c\u8a9e"
    },
    { // The filename encoding is specified by the referrer charset.
      __LINE__,
      "http://example.com/V%FDvojov%E1%20psychologie.doc",
      "",
      "iso-8859-1",
      "",
      "",
      L"",
      L"V\u00fdvojov\u00e1 psychologie.doc"
    },
    { // Suggested filename takes precedence over URL
      __LINE__,
      "http://www.google.com/test",
      "",
      "",
      "suggested",
      "",
      L"",
      L"suggested"
    },
    { // The content-disposition has higher precedence over the suggested name.
      __LINE__,
      "http://www.google.com/test",
      "attachment; filename=test.html",
      "",
      "suggested",
      "",
      L"",
      L"test.html"
    },
#if 0
    { // The filename encoding doesn't match the referrer charset, the system
      // charset, or UTF-8.
      // TODO(jshin): we need to handle this case.
      __LINE__,
      "http://example.com/V%FDvojov%E1%20psychologie.doc",
      "",
      "utf-8",
      "",
      "",
      L"",
      L"V\u00fdvojov\u00e1 psychologie.doc",
    },
#endif
    // Raw 8bit characters in C-D
    {
      __LINE__,
      "http://www.example.com/images?id=3",
      "attachment; filename=caf\xc3\xa9.png",
      "iso-8859-1",
      "",
      "image/png",
      L"",
      L"caf\u00e9.png"
    },
    {
      __LINE__,
      "http://www.example.com/images?id=3",
      "attachment; filename=caf\xe5.png",
      "windows-1253",
      "",
      "image/png",
      L"",
      L"caf\u03b5.png"
    },
    { // No 'filename' keyword in the disposition, use the URL
      __LINE__,
      "http://www.evil.com/my_download.txt",
      "a_file_name.txt",
      "",
      "",
      "text/plain",
      L"download",
      L"my_download.txt"
    },
    { // Spaces in the disposition file name
      __LINE__,
      "http://www.frontpagehacker.com/a_download.exe",
      "filename=My Downloaded File.exe",
      "",
      "",
      "application/octet-stream",
      L"download",
      L"My Downloaded File.exe"
    },
    { // % encoded
      __LINE__,
      "http://www.examples.com/",
      "attachment; "
      "filename=\"%EC%98%88%EC%88%A0%20%EC%98%88%EC%88%A0.jpg\"",
      "",
      "",
      "image/jpeg",
      L"download",
      L"\uc608\uc220 \uc608\uc220.jpg"
    },
    { // name= parameter
      __LINE__,
      "http://www.examples.com/q.cgi?id=abc",
      "attachment; name=abc de.pdf",
      "",
      "",
      "application/octet-stream",
      L"download",
      L"abc de.pdf"
    },
    {
      __LINE__,
      "http://www.example.com/path",
      "filename=\"=?EUC-JP?Q?=B7=DD=BD=D13=2Epng?=\"",
      "",
      "",
      "image/png",
      L"download",
      L"\x82b8\x8853" L"3.png"
    },
    { // The following two have invalid CD headers and filenames come from the
      // URL.
      __LINE__,
      "http://www.example.com/test%20123",
      "attachment; filename==?iiso88591?Q?caf=EG?=",
      "",
      "",
      "image/jpeg",
      L"download",
      L"test 123" JPEG_EXT
    },
    {
      __LINE__,
      "http://www.google.com/%EC%98%88%EC%88%A0%20%EC%98%88%EC%88%A0.jpg",
      "malformed_disposition",
      "",
      "",
      "image/jpeg",
      L"download",
      L"\uc608\uc220 \uc608\uc220.jpg"
    },
    { // Invalid C-D. No filename from URL. Falls back to 'download'.
      __LINE__,
      "http://www.google.com/path1/path2/",
      "attachment; filename==?iso88591?Q?caf=E3?",
      "",
      "",
      "image/jpeg",
      L"download",
      L"download" JPEG_EXT
    },
  };

  // Tests filename generation.  Once the correct filename is
  // selected, they should be passed through the validation steps and
  // a correct extension should be added if necessary.
  const GenerateFilenameCase generation_tests[] = {
    // Dotfiles. Ensures preceeding period(s) stripped.
    {
      __LINE__,
      "http://www.google.com/.test.html",
      "",
      "",
      "",
      "",
      L"",
      L"test.html"
    },
    {
      __LINE__,
      "http://www.google.com/.test",
      "",
      "",
      "",
      "",
      L"",
      L"test"
    },
    {
      __LINE__,
      "http://www.google.com/..test",
      "",
      "",
      "",
      "",
      L"",
      L"test"
    },
    { // Disposition has relative paths, remove directory separators
      __LINE__,
      "http://www.evil.com/my_download.txt",
      "filename=../../../../././../a_file_name.txt",
      "",
      "",
      "text/plain",
      L"download",
      L"-..-..-..-.-.-..-a_file_name.txt"
    },
    { // Disposition has parent directories, remove directory separators
      __LINE__,
      "http://www.evil.com/my_download.txt",
      "filename=dir1/dir2/a_file_name.txt",
      "",
      "",
      "text/plain",
      L"download",
      L"dir1-dir2-a_file_name.txt"
    },
    { // Disposition has relative paths, remove directory separators
      __LINE__,
      "http://www.evil.com/my_download.txt",
      "filename=..\\..\\..\\..\\.\\.\\..\\a_file_name.txt",
      "",
      "",
      "text/plain",
      L"download",
      L"-..-..-..-.-.-..-a_file_name.txt"
    },
    { // Disposition has parent directories, remove directory separators
      __LINE__,
      "http://www.evil.com/my_download.txt",
      "filename=dir1\\dir2\\a_file_name.txt",
      "",
      "",
      "text/plain",
      L"download",
      L"dir1-dir2-a_file_name.txt"
    },
    { // No useful information in disposition or URL, use default
      __LINE__,
      "http://www.truncated.com/path/",
      "",
      "",
      "",
      "text/plain",
      L"download",
      L"download" TXT_EXT
    },
    { // Filename looks like HTML?
      __LINE__,
      "http://www.evil.com/get/malware/here",
      "filename=\"<blink>Hello kitty</blink>\"",
      "",
      "",
      "text/plain",
      L"default",
      L"-blink-Hello kitty--blink-" TXT_EXT
    },
    { // A normal avi should get .avi and not .avi.avi
      __LINE__,
      "https://blah.google.com/misc/2.avi",
      "",
      "",
      "",
      "video/x-msvideo",
      L"download",
      L"2.avi"
    },
    { // Extension generation
      __LINE__,
      "http://www.example.com/my-cat",
      "filename=my-cat",
      "",
      "",
      "image/jpeg",
      L"download",
      L"my-cat" JPEG_EXT
    },
    {
      __LINE__,
      "http://www.example.com/my-cat",
      "filename=my-cat",
      "",
      "",
      "text/plain",
      L"download",
      L"my-cat.txt"
    },
    {
      __LINE__,
      "http://www.example.com/my-cat",
      "filename=my-cat",
      "",
      "",
      "text/html",
      L"download",
      L"my-cat" HTML_EXT
    },
    { // Unknown MIME type
      __LINE__,
      "http://www.example.com/my-cat",
      "filename=my-cat",
      "",
      "",
      "dance/party",
      L"download",
      L"my-cat"
    },
    {
      __LINE__,
      "http://www.example.com/my-cat.jpg",
      "filename=my-cat.jpg",
      "",
      "",
      "text/plain",
      L"download",
      L"my-cat.jpg"
    },
    // Windows specific tests
#if defined(OS_WIN)
    {
      __LINE__,
      "http://www.goodguy.com/evil.exe",
      "filename=evil.exe",
      "",
      "",
      "image/jpeg",
      L"download",
      L"evil.exe"
    },
    {
      __LINE__,
      "http://www.goodguy.com/ok.exe",
      "filename=ok.exe",
      "",
      "",
      "binary/octet-stream",
      L"download",
      L"ok.exe"
    },
    {
      __LINE__,
      "http://www.goodguy.com/evil.dll",
      "filename=evil.dll",
      "",
      "",
      "dance/party",
      L"download",
      L"evil.dll"
    },
    {
      __LINE__,
      "http://www.goodguy.com/evil.exe",
      "filename=evil",
      "",
      "",
      "application/rss+xml",
      L"download",
      L"evil"
    },
    // Test truncation of trailing dots and spaces
    {
      __LINE__,
      "http://www.goodguy.com/evil.exe ",
      "filename=evil.exe ",
      "",
      "",
      "binary/octet-stream",
      L"download",
      L"evil.exe"
    },
    {
      __LINE__,
      "http://www.goodguy.com/evil.exe.",
      "filename=evil.exe.",
      "",
      "",
      "binary/octet-stream",
      L"download",
      L"evil.exe-"
    },
    {
      __LINE__,
      "http://www.goodguy.com/evil.exe.  .  .",
      "filename=evil.exe.  .  .",
      "",
      "",
      "binary/octet-stream",
      L"download",
      L"evil.exe-------"
    },
    {
      __LINE__,
      "http://www.goodguy.com/evil.",
      "filename=evil.",
      "",
      "",
      "binary/octet-stream",
      L"download",
      L"evil-"
    },
    {
      __LINE__,
      "http://www.goodguy.com/. . . . .",
      "filename=. . . . .",
      "",
      "",
      "binary/octet-stream",
      L"download",
      L"download"
    },
    {
      __LINE__,
      "http://www.badguy.com/attachment?name=meh.exe%C2%A0",
      "attachment; filename=\"meh.exe\xC2\xA0\"",
      "",
      "",
      "binary/octet-stream",
      L"",
      L"meh.exe-"
    },
#endif  // OS_WIN
    {
      __LINE__,
      "http://www.goodguy.com/utils.js",
      "filename=utils.js",
      "",
      "",
      "application/x-javascript",
      L"download",
      L"utils.js"
    },
    {
      __LINE__,
      "http://www.goodguy.com/contacts.js",
      "filename=contacts.js",
      "",
      "",
      "application/json",
      L"download",
      L"contacts.js"
    },
    {
      __LINE__,
      "http://www.goodguy.com/utils.js",
      "filename=utils.js",
      "",
      "",
      "text/javascript",
      L"download",
      L"utils.js"
    },
    {
      __LINE__,
      "http://www.goodguy.com/utils.js",
      "filename=utils.js",
      "",
      "",
      "text/javascript;version=2",
      L"download",
      L"utils.js"
    },
    {
      __LINE__,
      "http://www.goodguy.com/utils.js",
      "filename=utils.js",
      "",
      "",
      "application/ecmascript",
      L"download",
      L"utils.js"
    },
    {
      __LINE__,
      "http://www.goodguy.com/utils.js",
      "filename=utils.js",
      "",
      "",
      "application/ecmascript;version=4",
      L"download",
      L"utils.js"
    },
    {
      __LINE__,
      "http://www.goodguy.com/program.exe",
      "filename=program.exe",
      "",
      "",
      "application/foo-bar",
      L"download",
      L"program.exe"
    },
    {
      __LINE__,
      "http://www.evil.com/../foo.txt",
      "filename=../foo.txt",
      "",
      "",
      "text/plain",
      L"download",
      L"-foo.txt"
    },
    {
      __LINE__,
      "http://www.evil.com/..\\foo.txt",
      "filename=..\\foo.txt",
      "",
      "",
      "text/plain",
      L"download",
      L"-foo.txt"
    },
    {
      __LINE__,
      "http://www.evil.com/.hidden",
      "filename=.hidden",
      "",
      "",
      "text/plain",
      L"download",
      L"hidden" TXT_EXT
    },
    {
      __LINE__,
      "http://www.evil.com/trailing.",
      "filename=trailing.",
      "",
      "",
      "dance/party",
      L"download",
#if defined(OS_WIN)
      L"trailing-"
#else
      L"trailing"
#endif
    },
    {
      __LINE__,
      "http://www.evil.com/trailing.",
      "filename=trailing.",
      "",
      "",
      "text/plain",
      L"download",
#if defined(OS_WIN)
      L"trailing-" TXT_EXT
#else
      L"trailing" TXT_EXT
#endif
    },
    {
      __LINE__,
      "http://www.evil.com/.",
      "filename=.",
      "",
      "",
      "dance/party",
      L"download",
      L"download"
    },
    {
      __LINE__,
      "http://www.evil.com/..",
      "filename=..",
      "",
      "",
      "dance/party",
      L"download",
      L"download"
    },
    {
      __LINE__,
      "http://www.evil.com/...",
      "filename=...",
      "",
      "",
      "dance/party",
      L"download",
      L"download"
    },
    { // Note that this one doesn't have "filename=" on it.
      __LINE__,
      "http://www.evil.com/",
      "a_file_name.txt",
      "",
      "",
      "image/jpeg",
      L"download",
      L"download" JPEG_EXT
    },
    {
      __LINE__,
      "http://www.evil.com/",
      "filename=",
      "",
      "",
      "image/jpeg",
      L"download",
      L"download" JPEG_EXT
    },
    {
      __LINE__,
      "http://www.example.com/simple",
      "filename=simple",
      "",
      "",
      "application/octet-stream",
      L"download",
      L"simple"
    },
    // Reserved words on Windows
    {
      __LINE__,
      "http://www.goodguy.com/COM1",
      "filename=COM1",
      "",
      "",
      "application/foo-bar",
      L"download",
#if defined(OS_WIN)
      L"_COM1"
#else
      L"COM1"
#endif
    },
    {
      __LINE__,
      "http://www.goodguy.com/COM4.txt",
      "filename=COM4.txt",
      "",
      "",
      "text/plain",
      L"download",
#if defined(OS_WIN)
      L"_COM4.txt"
#else
      L"COM4.txt"
#endif
    },
    {
      __LINE__,
      "http://www.goodguy.com/lpt1.TXT",
      "filename=lpt1.TXT",
      "",
      "",
      "text/plain",
      L"download",
#if defined(OS_WIN)
      L"_lpt1.TXT"
#else
      L"lpt1.TXT"
#endif
    },
    {
      __LINE__,
      "http://www.goodguy.com/clock$.txt",
      "filename=clock$.txt",
      "",
      "",
      "text/plain",
      L"download",
#if defined(OS_WIN)
      L"_clock$.txt"
#else
      L"clock$.txt"
#endif
    },
    { // Validation should also apply to sugested name
      __LINE__,
      "http://www.goodguy.com/blah$.txt",
      "filename=clock$.txt",
      "",
      "clock$.txt",
      "text/plain",
      L"download",
#if defined(OS_WIN)
      L"_clock$.txt"
#else
      L"clock$.txt"
#endif
    },
    {
      __LINE__,
      "http://www.goodguy.com/mycom1.foo",
      "filename=mycom1.foo",
      "",
      "",
      "text/plain",
      L"download",
      L"mycom1.foo"
    },
    {
      __LINE__,
      "http://www.badguy.com/Setup.exe.local",
      "filename=Setup.exe.local",
      "",
      "",
      "application/foo-bar",
      L"download",
#if defined(OS_WIN)
      L"Setup.exe.download"
#else
      L"Setup.exe.local"
#endif
    },
    {
      __LINE__,
      "http://www.badguy.com/Setup.exe.local",
      "filename=Setup.exe.local.local",
      "",
      "",
      "application/foo-bar",
      L"download",
#if defined(OS_WIN)
      L"Setup.exe.local.download"
#else
      L"Setup.exe.local.local"
#endif
    },
    {
      __LINE__,
      "http://www.badguy.com/Setup.exe.lnk",
      "filename=Setup.exe.lnk",
      "",
      "",
      "application/foo-bar",
      L"download",
#if defined(OS_WIN)
      L"Setup.exe.download"
#else
      L"Setup.exe.lnk"
#endif
    },
    {
      __LINE__,
      "http://www.badguy.com/Desktop.ini",
      "filename=Desktop.ini",
      "",
      "",
      "application/foo-bar",
      L"download",
#if defined(OS_WIN)
      L"_Desktop.ini"
#else
      L"Desktop.ini"
#endif
    },
    {
      __LINE__,
      "http://www.badguy.com/Thumbs.db",
      "filename=Thumbs.db",
      "",
      "",
      "application/foo-bar",
      L"download",
#if defined(OS_WIN)
      L"_Thumbs.db"
#else
      L"Thumbs.db"
#endif
    },
    {
      __LINE__,
      "http://www.hotmail.com",
      "filename=source.jpg",
      "",
      "",
      "application/x-javascript",
      L"download",
      L"source.jpg"
    },
    { // http://crbug.com/5772.
      __LINE__,
      "http://www.example.com/foo.tar.gz",
      "",
      "",
      "",
      "application/x-tar",
      L"download",
      L"foo.tar.gz"
    },
    { // http://crbug.com/52250.
      __LINE__,
      "http://www.example.com/foo.tgz",
      "",
      "",
      "",
      "application/x-tar",
      L"download",
      L"foo.tgz"
    },
    { // http://crbug.com/7337.
      __LINE__,
      "http://maged.lordaeron.org/blank.reg",
      "",
      "",
      "",
      "text/x-registry",
      L"download",
      L"blank.reg"
    },
    {
      __LINE__,
      "http://www.example.com/bar.tar",
      "",
      "",
      "",
      "application/x-tar",
      L"download",
      L"bar.tar"
    },
    {
      __LINE__,
      "http://www.example.com/bar.bogus",
      "",
      "",
      "",
      "application/x-tar",
      L"download",
      L"bar.bogus"
    },
    { // http://crbug.com/20337
      __LINE__,
      "http://www.example.com/.download.txt",
      "filename=.download.txt",
      "",
      "",
      "text/plain",
      L"-download",
      L"download.txt"
    },
    { // http://crbug.com/56855.
      __LINE__,
      "http://www.example.com/bar.sh",
      "",
      "",
      "",
      "application/x-sh",
      L"download",
      L"bar.sh"
    },
    { // http://crbug.com/61571
      __LINE__,
      "http://www.example.com/npdf.php?fn=foobar.pdf",
      "",
      "",
      "",
      "text/plain",
      L"download",
      L"npdf" TXT_EXT
    },
    { // Shouldn't overwrite C-D specified extension.
      __LINE__,
      "http://www.example.com/npdf.php?fn=foobar.pdf",
      "filename=foobar.jpg",
      "",
      "",
      "text/plain",
      L"download",
      L"foobar.jpg"
    },
    { // http://crbug.com/87719
      __LINE__,
      "http://www.example.com/image.aspx?id=blargh",
      "",
      "",
      "",
      "image/jpeg",
      L"download",
      L"image" JPEG_EXT
    },
#if defined(OS_CHROMEOS)
    { // http://crosbug.com/26028
      __LINE__,
      "http://www.example.com/fooa%cc%88.txt",
      "",
      "",
      "",
      "image/jpeg",
      L"foo\xe4",
      L"foo\xe4.txt"
    },
#endif
  };

  for (size_t i = 0; i < arraysize(selection_tests); ++i)
    RunGenerateFileNameTestCase(&selection_tests[i]);

  for (size_t i = 0; i < arraysize(generation_tests); ++i)
    RunGenerateFileNameTestCase(&generation_tests[i]);

  for (size_t i = 0; i < arraysize(generation_tests); ++i) {
    GenerateFilenameCase test_case = generation_tests[i];
    test_case.referrer_charset = "GBK";
    RunGenerateFileNameTestCase(&test_case);
  }
}

}  // namespace net