<?php

/**
 * Test cases for @{class:PhutilURI} parser.
 */
final class PhutilURITestCase extends PhutilTestCase {

  public function testURIParsing() {
    $uri = new PhutilURI('http://user:pass@host:99/path/?query=value#fragment');
    $this->assertEqual('http', $uri->getProtocol(), pht('protocol'));
    $this->assertEqual('user', $uri->getUser(), pht('user'));
    $this->assertEqual('pass', $uri->getPass(), pht('password'));
    $this->assertEqual('host', $uri->getDomain(), pht('domain'));
    $this->assertEqual('99', $uri->getPort(), pht('port'));

    $this->assertEqual('/path/', $uri->getPath(), pht('path'));
    $this->assertEqual(
      array(
        'query' => 'value',
      ),
      $uri->getQueryParams(),
      'query params');
    $this->assertEqual('fragment', $uri->getFragment(), pht('fragment'));
    $this->assertEqual(
      'http://user:pass@host:99/path/?query=value#fragment',
      (string)$uri,
      'uri');


    $uri = new PhutilURI('ssh://git@example.com/example/example.git');
    $this->assertEqual('ssh', $uri->getProtocol(), pht('protocol'));
    $this->assertEqual('git', $uri->getUser(), pht('user'));
    $this->assertEqual('', $uri->getPass(), pht('password'));
    $this->assertEqual('example.com', $uri->getDomain(), pht('domain'));
    $this->assertEqual('', $uri->getPort(), 'port');

    $this->assertEqual('/example/example.git', $uri->getPath(), pht('path'));
    $this->assertEqual(
      array(),
      $uri->getQueryParams(),
      pht('query parameters'));
    $this->assertEqual('', $uri->getFragment(), pht('fragment'));
    $this->assertEqual(
      'ssh://git@example.com/example/example.git',
      (string)$uri,
      'uri');


    $uri = new PhutilURI('http://0@domain.com/');
    $this->assertEqual('0', $uri->getUser());
    $this->assertEqual('http://0@domain.com/', (string)$uri);

    $uri = new PhutilURI('http://0:0@domain.com/');
    $this->assertEqual('0', $uri->getUser());
    $this->assertEqual('0', $uri->getPass());
    $this->assertEqual('http://0:0@domain.com/', (string)$uri);

    $uri = new PhutilURI('http://%20:%20@domain.com/');
    $this->assertEqual(' ', $uri->getUser());
    $this->assertEqual(' ', $uri->getPass());
    $this->assertEqual('http://%20:%20@domain.com/', (string)$uri);

    $uri = new PhutilURI('http://%40:%40@domain.com/');
    $this->assertEqual('@', $uri->getUser());
    $this->assertEqual('@', $uri->getPass());
    $this->assertEqual('http://%40:%40@domain.com/', (string)$uri);

    $uri = new PhutilURI('http://%2F:%2F@domain.com/');
    $this->assertEqual('/', $uri->getUser());
    $this->assertEqual('/', $uri->getPass());
    $this->assertEqual('http://%2F:%2F@domain.com/', (string)$uri);

    // These tests are covering cases where cURL and parse_url() behavior
    // may differ in potentially dangerous ways. See T6755 for discussion.

    // In general, we defuse these attacks by emitting URIs which escape
    // special characters so that they are interpreted unambiguously by
    // cURL in the same way that parse_url() interpreted them.

    $uri = new PhutilURI('http://u:p@evil.com?@good.com');
    $this->assertEqual('u', $uri->getUser());
    $this->assertEqual('p', $uri->getPass());
    $this->assertEqual('evil.com', $uri->getDomain());
    $this->assertEqual('http://u:p@evil.com?%40good.com=', (string)$uri);

    // The behavior of URLs in these forms differs for different versions
    // of cURL, PHP, and other software. Because safe parsing is a tricky
    // proposition and these URIs are almost certainly malicious, we just
    // reject them. See T12526 for discussion.

    $dangerous = array(
      // Ambiguous encoding.
      'http://good.com#u:p@evil.com/' => true,
      'http://good.com?u:p@evil.com/' => true,

      // Unambiguous encoding: with a trailing slash.
      'http://good.com/#u:p@evil.com/' => false,
      'http://good.com/?u:p@evil.com/' => false,

      // Unambiguous encoding: with escaping.
      'http://good.com%23u:p@evil.com/' => false,
      'http://good.com%40u:p@evil.com/' => false,
    );

    foreach ($dangerous as $input => $expect) {
      $caught = null;
      try {
        new PhutilURI($input);
      } catch (Exception $ex) {
        $caught = $ex;
      }

      $this->assertEqual(
        $expect,
        ($caught instanceof $ex),
        pht('Unexpected parse result for dangerous URI "%s".', $input));
    }

    $uri = new PhutilURI('www.example.com');
    $this->assertEqual('', $uri->getProtocol());
    $this->assertEqual('www.example.com', (string)$uri);
  }

  public function testURIGeneration() {
    $uri = new PhutilURI('http://example.com');
    $uri->setPath('bar');
    $this->assertEqual('http://example.com/bar', $uri->__toString());
  }

  public function testStrictURIParsingOfHosts() {
    $uri = new PhutilURI('http://&amp;/');
    $this->assertEqual('', $uri->getDomain());
  }

  public function testStrictURIParsingOfLeadingWhitespace() {
    $uri = new PhutilURI(' http://example.com/');
    $this->assertEqual('', $uri->getDomain());
  }

  public function testAppendPath() {
    $uri = new PhutilURI('http://example.com');
    $uri->appendPath('foo');
    $this->assertEqual('http://example.com/foo', $uri->__toString());
    $uri->appendPath('bar');
    $this->assertEqual('http://example.com/foo/bar', $uri->__toString());

    $uri = new PhutilURI('http://example.com');
    $uri->appendPath('/foo/');
    $this->assertEqual('http://example.com/foo/', $uri->__toString());
    $uri->appendPath('/bar/');
    $this->assertEqual('http://example.com/foo/bar/', $uri->__toString());

    $uri = new PhutilURI('http://example.com');
    $uri->appendPath('foo');
    $this->assertEqual('http://example.com/foo', $uri->__toString());
    $uri->appendPath('/bar/');
    $this->assertEqual('http://example.com/foo/bar/', $uri->__toString());
  }

  public function testUnusualURIs() {
    $uri = new PhutilURI('file:///path/to/file');
    $this->assertEqual('file', $uri->getProtocol(), pht('protocol'));
    $this->assertEqual('', $uri->getDomain(), pht('domain'));
    $this->assertEqual('/path/to/file', $uri->getPath(), pht('path'));

    $uri = new PhutilURI('idea://open?x=/');
    $this->assertEqual('idea', $uri->getProtocol(), pht('protocol'));
    $this->assertEqual('open', $uri->getDomain(), pht('domain'));
    $this->assertEqual('', $uri->getPath(), pht('path'));
    $this->assertEqual(
      array(
        'x' => '/',
      ),
      $uri->getQueryParams());

    // This is not a legitimate URI and should not parse as one.
    $uri = new PhutilURI('fruit.list: apple banana cherry');
    $this->assertEqual('', $uri->getDomain());
  }

  public function testAmbiguousURIs() {
    // It's important that this be detected as a Javascript URI, because that
    // is how browsers will treat it.
    $uri = new PhutilURI('javascript:evil');
    $this->assertEqual('javascript', $uri->getProtocol());


    // This is "wrong", in that the user probably intends for this to be a
    // Git-style URI, but we can not easily parse it as one without making the
    // "javascript" case above unsafe.
    $uri = new PhutilURI('localhost:todo.txt');
    $this->assertEqual('localhost', $uri->getProtocol());


    // These variants are unambiguous and safe.
    $uri = new PhutilURI('localhost.com:todo.txt');
    $this->assertEqual('localhost.com', $uri->getDomain());

    $uri = new PhutilURI('user@localhost:todo.txt');
    $this->assertEqual('localhost', $uri->getDomain());

    // This could either be a Git URI with relative path "22", or a normal URI
    // with port "22". We should assume it is a port number because this is
    // relatively common, while relative Git URIs pointing at numeric filenames
    // are bizarre.
    $uri = new PhutilURI('domain.com:22');
    $this->assertEqual('domain.com', $uri->getDomain());
    $this->assertEqual('22', $uri->getPort());
  }

  public function testDefaultPorts() {
    $uri = new PhutilURI('http://www.example.com');
    $this->assertEqual('80', $uri->getPortWithProtocolDefault());

    $uri = new PhutilURI('https://www.example.com');
    $this->assertEqual('443', $uri->getPortWithProtocolDefault());

    $uri = new PhutilURI('ssh://git@example.com/example/example.git');
    $this->assertEqual('22', $uri->getPortWithProtocolDefault());

    $uri = new PhutilURI('unknown://www.example.com');
    $this->assertEqual('', $uri->getPortWithProtocolDefault());
  }

  public function testGitURIParsing() {
    $uri = new PhutilURI('git@host.com:path/to/something');
    $this->assertEqual('ssh', $uri->getProtocol());
    $this->assertEqual('git', $uri->getUser());
    $this->assertEqual('host.com', $uri->getDomain());
    $this->assertEqual('path/to/something', $uri->getPath());
    $this->assertEqual('git@host.com:path/to/something', (string)$uri);

    $uri = new PhutilURI('host.com:path/to/something');
    $this->assertEqual('ssh', $uri->getProtocol());
    $this->assertEqual('', $uri->getUser());
    $this->assertEqual('host.com', $uri->getDomain());
    $this->assertEqual('path/to/something', $uri->getPath());
    $this->assertEqual('host.com:path/to/something', (string)$uri);

    $uri_1 = new PhutilURI('host.com:path/to/something');
    $uri_2 = new PhutilURI($uri_1);

    $this->assertEqual((string)$uri_1, (string)$uri_2);
  }

  public function testStrictGitURIParsingOfLeadingWhitespace() {
    $uri = new PhutilURI(' user@example.com:path');
    $this->assertEqual('', $uri->getDomain());
  }

  public function testNoRelativeURIPaths() {
    $uri = new PhutilURI('user@example.com:relative_path');

    $caught = null;
    try {
      $uri->setType(PhutilURI::TYPE_URI);
    } catch (Exception $ex) {
      $caught = $ex;
    }

    $this->assertTrue($caught instanceof Exception);
  }

}
