// Copyright 2013 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/url_util.h"

#include <ostream>

#include "base/format_macros.h"
#include "base/strings/utf_string_conversions.h"
#include "base/strings/stringprintf.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "url/gurl.h"

using base::ASCIIToUTF16;
using base::WideToUTF16;

namespace net {
namespace {

TEST(UrlUtilTest, AppendQueryParameter) {
  // Appending a name-value pair to a URL without a query component.
  EXPECT_EQ("http://example.com/path?name=value",
            AppendQueryParameter(GURL("http://example.com/path"),
                                 "name", "value").spec());

  // Appending a name-value pair to a URL with a query component.
  // The original component should be preserved, and the new pair should be
  // appended with '&'.
  EXPECT_EQ("http://example.com/path?existing=one&name=value",
            AppendQueryParameter(GURL("http://example.com/path?existing=one"),
                                 "name", "value").spec());

  // Appending a name-value pair with unsafe characters included. The
  // unsafe characters should be escaped.
  EXPECT_EQ("http://example.com/path?existing=one&na+me=v.alue%3D",
            AppendQueryParameter(GURL("http://example.com/path?existing=one"),
                                 "na me", "v.alue=").spec());

}

TEST(UrlUtilTest, AppendOrReplaceQueryParameter) {
  // Appending a name-value pair to a URL without a query component.
  EXPECT_EQ("http://example.com/path?name=value",
            AppendOrReplaceQueryParameter(GURL("http://example.com/path"),
                                 "name", "value").spec());

  // Appending a name-value pair to a URL with a query component.
  // The original component should be preserved, and the new pair should be
  // appended with '&'.
  EXPECT_EQ("http://example.com/path?existing=one&name=value",
      AppendOrReplaceQueryParameter(
          GURL("http://example.com/path?existing=one"),
          "name", "value").spec());

  // Appending a name-value pair with unsafe characters included. The
  // unsafe characters should be escaped.
  EXPECT_EQ("http://example.com/path?existing=one&na+me=v.alue%3D",
      AppendOrReplaceQueryParameter(
          GURL("http://example.com/path?existing=one"),
          "na me", "v.alue=").spec());

  // Replace value of an existing paramater.
  EXPECT_EQ("http://example.com/path?existing=one&name=new",
      AppendOrReplaceQueryParameter(
          GURL("http://example.com/path?existing=one&name=old"),
          "name", "new").spec());

  // Replace a name-value pair with unsafe characters included. The
  // unsafe characters should be escaped.
  EXPECT_EQ("http://example.com/path?na+me=n.ew%3D&existing=one",
      AppendOrReplaceQueryParameter(
          GURL("http://example.com/path?na+me=old&existing=one"),
          "na me", "n.ew=").spec());

  // Replace the value of first parameter with this name only.
  EXPECT_EQ("http://example.com/path?name=new&existing=one&name=old",
      AppendOrReplaceQueryParameter(
          GURL("http://example.com/path?name=old&existing=one&name=old"),
          "name", "new").spec());

  // Preserve the content of the original params regarless of our failure to
  // interpret them correctly.
  EXPECT_EQ("http://example.com/path?bar&name=new&left=&"
            "=right&=&&name=again",
      AppendOrReplaceQueryParameter(
          GURL("http://example.com/path?bar&name=old&left=&"
                "=right&=&&name=again"),
          "name", "new").spec());
}

TEST(UrlUtilTest, GetValueForKeyInQuery) {
  GURL url("http://example.com/path?name=value&boolParam&"
           "url=http://test.com/q?n1%3Dv1%26n2");
  std::string value;

  // False when getting a non-existent query param.
  EXPECT_FALSE(GetValueForKeyInQuery(url, "non-exist", &value));

  // True when query param exist.
  EXPECT_TRUE(GetValueForKeyInQuery(url, "name", &value));
  EXPECT_EQ("value", value);

  EXPECT_TRUE(GetValueForKeyInQuery(url, "boolParam", &value));
  EXPECT_EQ("", value);

  EXPECT_TRUE(GetValueForKeyInQuery(url, "url", &value));
  EXPECT_EQ("http://test.com/q?n1=v1&n2", value);
}

TEST(UrlUtilTest, GetValueForKeyInQueryInvalidURL) {
  GURL url("http://%01/?test");
  std::string value;

  // Always false when parsing an invalid URL.
  EXPECT_FALSE(GetValueForKeyInQuery(url, "test", &value));
}

TEST(UrlUtilTest, ParseQuery) {
  const GURL url("http://example.com/path?name=value&boolParam&"
                 "url=http://test.com/q?n1%3Dv1%26n2&"
                 "multikey=value1&multikey=value2&multikey");
  QueryIterator it(url);

  ASSERT_FALSE(it.IsAtEnd());
  EXPECT_EQ("name", it.GetKey());
  EXPECT_EQ("value", it.GetValue());
  EXPECT_EQ("value", it.GetUnescapedValue());
  it.Advance();

  ASSERT_FALSE(it.IsAtEnd());
  EXPECT_EQ("boolParam", it.GetKey());
  EXPECT_EQ("", it.GetValue());
  EXPECT_EQ("", it.GetUnescapedValue());
  it.Advance();

  ASSERT_FALSE(it.IsAtEnd());
  EXPECT_EQ("url", it.GetKey());
  EXPECT_EQ("http://test.com/q?n1%3Dv1%26n2", it.GetValue());
  EXPECT_EQ("http://test.com/q?n1=v1&n2", it.GetUnescapedValue());
  it.Advance();

  ASSERT_FALSE(it.IsAtEnd());
  EXPECT_EQ("multikey", it.GetKey());
  EXPECT_EQ("value1", it.GetValue());
  EXPECT_EQ("value1", it.GetUnescapedValue());
  it.Advance();

  ASSERT_FALSE(it.IsAtEnd());
  EXPECT_EQ("multikey", it.GetKey());
  EXPECT_EQ("value2", it.GetValue());
  EXPECT_EQ("value2", it.GetUnescapedValue());
  it.Advance();

  ASSERT_FALSE(it.IsAtEnd());
  EXPECT_EQ("multikey", it.GetKey());
  EXPECT_EQ("", it.GetValue());
  EXPECT_EQ("", it.GetUnescapedValue());
  it.Advance();

  EXPECT_TRUE(it.IsAtEnd());
}

TEST(UrlUtilTest, ParseQueryInvalidURL) {
  const GURL url("http://%01/?test");
  QueryIterator it(url);
  EXPECT_TRUE(it.IsAtEnd());
}

TEST(UrlUtilTest, ParseHostAndPort) {
  const struct {
    const char* const input;
    bool success;
    const char* const expected_host;
    int expected_port;
  } tests[] = {
    // Valid inputs:
    {"foo:10", true, "foo", 10},
    {"foo", true, "foo", -1},
    {
      "[1080:0:0:0:8:800:200C:4171]:11",
      true,
      "1080:0:0:0:8:800:200C:4171",
      11
    },
    {
      "[1080:0:0:0:8:800:200C:4171]",
      true,
      "1080:0:0:0:8:800:200C:4171",
      -1
    },

    // Because no validation is done on the host, the following are accepted,
    // even though they are invalid names.
    {"]", true, "]", -1},
    {"::1", true, ":", 1},
    // Invalid inputs:
    {"foo:bar", false, "", -1},
    {"foo:", false, "", -1},
    {":", false, "", -1},
    {":80", false, "", -1},
    {"", false, "", -1},
    {"porttoolong:300000", false, "", -1},
    {"usrname@host", false, "", -1},
    {"usrname:password@host", false, "", -1},
    {":password@host", false, "", -1},
    {":password@host:80", false, "", -1},
    {":password@host", false, "", -1},
    {"@host", false, "", -1},
    {"[", false, "", -1},
    {"[]", false, "", -1},
  };

  for (const auto& test : tests) {
    std::string host;
    int port;
    bool ok = ParseHostAndPort(test.input, &host, &port);
    EXPECT_EQ(test.success, ok);

    if (test.success) {
      EXPECT_EQ(test.expected_host, host);
      EXPECT_EQ(test.expected_port, port);
    }
  }
}
TEST(UrlUtilTest, GetHostAndPort) {
  const struct {
    GURL url;
    const char* const expected_host_and_port;
  } tests[] = {
    { GURL("http://www.foo.com/x"), "www.foo.com:80"},
    { GURL("http://www.foo.com:21/x"), "www.foo.com:21"},

    // For IPv6 literals should always include the brackets.
    { GURL("http://[1::2]/x"), "[1::2]:80"},
    { GURL("http://[::a]:33/x"), "[::a]:33"},
  };
  for (const auto& test : tests) {
    std::string host_and_port = GetHostAndPort(test.url);
    EXPECT_EQ(std::string(test.expected_host_and_port), host_and_port);
  }
}

TEST(UrlUtilTest, GetHostAndOptionalPort) {
  const struct {
    GURL url;
    const char* const expected_host_and_port;
  } tests[] = {
    { GURL("http://www.foo.com/x"), "www.foo.com"},
    { GURL("http://www.foo.com:21/x"), "www.foo.com:21"},

    // For IPv6 literals should always include the brackets.
    { GURL("http://[1::2]/x"), "[1::2]"},
    { GURL("http://[::a]:33/x"), "[::a]:33"},
  };
  for (const auto& test : tests) {
    std::string host_and_port = GetHostAndOptionalPort(test.url);
    EXPECT_EQ(std::string(test.expected_host_and_port), host_and_port);
  }
}

TEST(UrlUtilTest, GetHostOrSpecFromURL) {
  EXPECT_EQ("example.com",
            GetHostOrSpecFromURL(GURL("http://example.com/test")));
  EXPECT_EQ("example.com",
            GetHostOrSpecFromURL(GURL("http://example.com./test")));
  EXPECT_EQ("file:///tmp/test.html",
            GetHostOrSpecFromURL(GURL("file:///tmp/test.html")));
}

TEST(UrlUtilTest, CompliantHost) {
  struct {
    const char* const host;
    bool expected_output;
  } compliant_host_cases[] = {
      {"", false},
      {"a", true},
      {"-", false},
      {"_", false},
      {".", false},
      {"9", true},
      {"9a", true},
      {"9_", true},
      {"a.", true},
      {"a.a", true},
      {"9.a", true},
      {"a.9", true},
      {"_9a", false},
      {"-9a", false},
      {"a.a9", true},
      {"_.9a", true},
      {"a.-a9", false},
      {"a+9a", false},
      {"-a.a9", true},
      {"a_.a9", true},
      {"1-.a-b", true},
      {"1_.a-b", true},
      {"1-2.a_b", true},
      {"a.b.c.d.e", true},
      {"1.2.3.4.5", true},
      {"1.2.3.4.5.", true},
  };

  for (const auto& compliant_host : compliant_host_cases) {
    EXPECT_EQ(compliant_host.expected_output,
              IsCanonicalizedHostCompliant(compliant_host.host));
  }
}

struct NonUniqueNameTestData {
  bool is_unique;
  const char* const hostname;
};

// Google Test pretty-printer.
void PrintTo(const NonUniqueNameTestData& data, std::ostream* os) {
  ASSERT_TRUE(data.hostname);
  *os << " hostname: " << testing::PrintToString(data.hostname)
      << "; is_unique: " << testing::PrintToString(data.is_unique);
}

const NonUniqueNameTestData kNonUniqueNameTestData[] = {
    // Domains under ICANN-assigned domains.
    { true, "google.com" },
    { true, "google.co.uk" },
    // Domains under private registries.
    { true, "appspot.com" },
    { true, "test.appspot.com" },
    // Unreserved IPv4 addresses (in various forms).
    { true, "8.8.8.8" },
    { true, "99.64.0.0" },
    { true, "212.15.0.0" },
    { true, "212.15" },
    { true, "212.15.0" },
    { true, "3557752832" },
    // Reserved IPv4 addresses (in various forms).
    { false, "192.168.0.0" },
    { false, "192.168.0.6" },
    { false, "10.0.0.5" },
    { false, "10.0" },
    { false, "10.0.0" },
    { false, "3232235526" },
    // Unreserved IPv6 addresses.
    { true, "FFC0:ba98:7654:3210:FEDC:BA98:7654:3210" },
    { true, "2000:ba98:7654:2301:EFCD:BA98:7654:3210" },
    // Reserved IPv6 addresses.
    { false, "::192.9.5.5" },
    { false, "FEED::BEEF" },
    { false, "FEC0:ba98:7654:3210:FEDC:BA98:7654:3210" },
    // 'internal'/non-IANA assigned domains.
    { false, "intranet" },
    { false, "intranet." },
    { false, "intranet.example" },
    { false, "host.intranet.example" },
    // gTLDs under discussion, but not yet assigned.
    { false, "intranet.corp" },
    { false, "intranet.internal" },
    // Invalid host names are treated as unique - but expected to be
    // filtered out before then.
    { true, "junk)(£)$*!@~#" },
    { true, "w$w.example.com" },
    { true, "nocolonsallowed:example" },
    { true, "[::4.5.6.9]" },
};

class UrlUtilNonUniqueNameTest
    : public testing::TestWithParam<NonUniqueNameTestData> {
 public:
  virtual ~UrlUtilNonUniqueNameTest() = default;

 protected:
  bool IsUnique(const std::string& hostname) {
    return !IsHostnameNonUnique(hostname);
  }
};

// Test that internal/non-unique names are properly identified as such, but
// that IP addresses and hosts beneath registry-controlled domains are flagged
// as unique names.
TEST_P(UrlUtilNonUniqueNameTest, IsHostnameNonUnique) {
  const NonUniqueNameTestData& test_data = GetParam();

  EXPECT_EQ(test_data.is_unique, IsUnique(test_data.hostname));
}

INSTANTIATE_TEST_CASE_P(, UrlUtilNonUniqueNameTest,
                        testing::ValuesIn(kNonUniqueNameTestData));

TEST(UrlUtilTest, IsLocalhost) {
  EXPECT_TRUE(HostStringIsLocalhost("localhost"));
  EXPECT_TRUE(HostStringIsLocalhost("localHosT"));
  EXPECT_TRUE(HostStringIsLocalhost("localhost."));
  EXPECT_TRUE(HostStringIsLocalhost("localHost."));
  EXPECT_TRUE(HostStringIsLocalhost("localhost.localdomain"));
  EXPECT_TRUE(HostStringIsLocalhost("localhost.localDOMain"));
  EXPECT_TRUE(HostStringIsLocalhost("localhost.localdomain."));
  EXPECT_TRUE(HostStringIsLocalhost("localhost6"));
  EXPECT_TRUE(HostStringIsLocalhost("localhost6."));
  EXPECT_TRUE(HostStringIsLocalhost("localhost6.localdomain6"));
  EXPECT_TRUE(HostStringIsLocalhost("localhost6.localdomain6."));
  EXPECT_TRUE(HostStringIsLocalhost("127.0.0.1"));
  EXPECT_TRUE(HostStringIsLocalhost("127.0.1.0"));
  EXPECT_TRUE(HostStringIsLocalhost("127.1.0.0"));
  EXPECT_TRUE(HostStringIsLocalhost("127.0.0.255"));
  EXPECT_TRUE(HostStringIsLocalhost("127.0.255.0"));
  EXPECT_TRUE(HostStringIsLocalhost("127.255.0.0"));
  EXPECT_TRUE(HostStringIsLocalhost("::1"));
  EXPECT_TRUE(HostStringIsLocalhost("0:0:0:0:0:0:0:1"));
  EXPECT_TRUE(HostStringIsLocalhost("foo.localhost"));
  EXPECT_TRUE(HostStringIsLocalhost("foo.localhost."));
  EXPECT_TRUE(HostStringIsLocalhost("foo.localhoST"));
  EXPECT_TRUE(HostStringIsLocalhost("foo.localhoST."));

  EXPECT_FALSE(HostStringIsLocalhost("localhostx"));
  EXPECT_FALSE(HostStringIsLocalhost("localhost.x"));
  EXPECT_FALSE(HostStringIsLocalhost("foo.localdomain"));
  EXPECT_FALSE(HostStringIsLocalhost("foo.localdomain.x"));
  EXPECT_FALSE(HostStringIsLocalhost("localhost6x"));
  EXPECT_FALSE(HostStringIsLocalhost("localhost.localdomain6"));
  EXPECT_FALSE(HostStringIsLocalhost("localhost6.localdomain"));
  EXPECT_FALSE(HostStringIsLocalhost("127.0.0.1.1"));
  EXPECT_FALSE(HostStringIsLocalhost(".127.0.0.255"));
  EXPECT_FALSE(HostStringIsLocalhost("::2"));
  EXPECT_FALSE(HostStringIsLocalhost("::1:1"));
  EXPECT_FALSE(HostStringIsLocalhost("0:0:0:0:1:0:0:1"));
  EXPECT_FALSE(HostStringIsLocalhost("::1:1"));
  EXPECT_FALSE(HostStringIsLocalhost("0:0:0:0:0:0:0:0:1"));
  EXPECT_FALSE(HostStringIsLocalhost("foo.localhost.com"));
  EXPECT_FALSE(HostStringIsLocalhost("foo.localhoste"));
  EXPECT_FALSE(HostStringIsLocalhost("foo.localhos"));
  EXPECT_FALSE(HostStringIsLocalhost("[::1]"));

  GURL localhost6("http://[::1]/");
  EXPECT_TRUE(IsLocalhost(localhost6));
}

TEST(UrlUtilTest, SimplifyUrlForRequest) {
  struct {
    const char* const input_url;
    const char* const expected_simplified_url;
  } tests[] = {
    {
      // Reference section should be stripped.
      "http://www.google.com:78/foobar?query=1#hash",
      "http://www.google.com:78/foobar?query=1",
    },
    {
      // Reference section can itself contain #.
      "http://192.168.0.1?query=1#hash#10#11#13#14",
      "http://192.168.0.1?query=1",
    },
    { // Strip username/password.
      "http://user:pass@google.com",
      "http://google.com/",
    },
    { // Strip both the reference and the username/password.
      "http://user:pass@google.com:80/sup?yo#X#X",
      "http://google.com/sup?yo",
    },
    { // Try an HTTPS URL -- strip both the reference and the username/password.
      "https://user:pass@google.com:80/sup?yo#X#X",
      "https://google.com:80/sup?yo",
    },
    { // Try an FTP URL -- strip both the reference and the username/password.
      "ftp://user:pass@google.com:80/sup?yo#X#X",
      "ftp://google.com:80/sup?yo",
    },
    { // Try a nonstandard URL
      "foobar://user:pass@google.com:80/sup?yo#X#X",
      "foobar://user:pass@google.com:80/sup?yo",
    },
  };
  for (const auto& test : tests) {
    SCOPED_TRACE(test.input_url);
    GURL input_url(GURL(test.input_url));
    GURL expected_url(GURL(test.expected_simplified_url));
    EXPECT_EQ(expected_url, SimplifyUrlForRequest(input_url));
  }
}

TEST(UrlUtilTest, GetIdentityFromURL) {
  struct {
    const char* const input_url;
    const char* const expected_username;
    const char* const expected_password;
  } tests[] = {
    {
      "http://username:password@google.com",
      "username",
      "password",
    },
    { // Test for http://crbug.com/19200
      "http://username:p@ssword@google.com",
      "username",
      "p@ssword",
    },
    { // Special URL characters should be unescaped.
      "http://username:p%3fa%26s%2fs%23@google.com",
      "username",
      "p?a&s/s#",
    },
    { // Username contains %20.
      "http://use rname:password@google.com",
      "use rname",
      "password",
    },
    { // Keep %00 as is.
      "http://use%00rname:password@google.com",
      "use%00rname",
      "password",
    },
    { // Use a '+' in the username.
      "http://use+rname:password@google.com",
      "use+rname",
      "password",
    },
    { // Use a '&' in the password.
      "http://username:p&ssword@google.com",
      "username",
      "p&ssword",
    },
  };
  for (const auto& test : tests) {
    SCOPED_TRACE(test.input_url);
    GURL url(test.input_url);

    base::string16 username, password;
    GetIdentityFromURL(url, &username, &password);

    EXPECT_EQ(ASCIIToUTF16(test.expected_username), username);
    EXPECT_EQ(ASCIIToUTF16(test.expected_password), password);
  }
}

// Try extracting a username which was encoded with UTF8.
TEST(UrlUtilTest, GetIdentityFromURL_UTF8) {
  GURL url(WideToUTF16(L"http://foo:\x4f60\x597d@blah.com"));

  EXPECT_EQ("foo", url.username());
  EXPECT_EQ("%E4%BD%A0%E5%A5%BD", url.password());

  // Extract the unescaped identity.
  base::string16 username, password;
  GetIdentityFromURL(url, &username, &password);

  // Verify that it was decoded as UTF8.
  EXPECT_EQ(ASCIIToUTF16("foo"), username);
  EXPECT_EQ(WideToUTF16(L"\x4f60\x597d"), password);
}

TEST(UrlUtilTest, GoogleHost) {
  struct {
    GURL url;
    bool expected_output;
  } google_host_cases[] = {
      {GURL("http://.google.com"), true},
      {GURL("http://.youtube.com"), true},
      {GURL("http://.gmail.com"), true},
      {GURL("http://.doubleclick.net"), true},
      {GURL("http://.gstatic.com"), true},
      {GURL("http://.googlevideo.com"), true},
      {GURL("http://.googleusercontent.com"), true},
      {GURL("http://.googlesyndication.com"), true},
      {GURL("http://.google-analytics.com"), true},
      {GURL("http://.googleadservices.com"), true},
      {GURL("http://.googleapis.com"), true},
      {GURL("http://a.google.com"), true},
      {GURL("http://b.youtube.com"), true},
      {GURL("http://c.gmail.com"), true},
      {GURL("http://google.com"), false},
      {GURL("http://youtube.com"), false},
      {GURL("http://gmail.com"), false},
      {GURL("http://google.coma"), false},
      {GURL("http://agoogle.com"), false},
      {GURL("http://oogle.com"), false},
      {GURL("http://google.co"), false},
      {GURL("http://oggole.com"), false},
  };

  for (const auto& host : google_host_cases) {
    EXPECT_EQ(host.expected_output, HasGoogleHost(host.url));
  }
}

}  // namespace
}  // namespace net