/**
* urlMemberSiteArray is a function called by both allowedToCrawlSite
* disallowedToCrawlSite to test if a url belongs to alist of
* regex's of urls or domain. This test function tests this functionality
*/
function urlMemberSiteArrayTestCase()
{
$sites = array("http://www.example.com/", "http://www.cs.sjsu.edu/faculty/pollett/*/*/", "http://www.bing.com/video/search?*&*&", "http://*.cool.*/a/*/", "domain:ucla.edu", "domain:foodnetwork.com");
$test_urls = array(array("http://www.cs.sjsu.edu/faculty/pollett/", false, "regex url negative 1"), array("http://www.bing.com/video/search?", false, "regex url negative 2"), array("http://www.cool.edu/a", false, "regex url negative 3"), array("http://ucla.edu.com", false, "domain test negative"), array("http://www.cs.sjsu.edu/faculty/pollett/a/b/c", true, "regex url positive 1"), array("http://www.bing.com/video/search?a&b&c", true, "regex url positive 2"), array("http://www.cool.bob.edu/a/b/c", true, "regex url positive 3"), array("http://test.ucla.edu", true, "domain test positive"), array("https://test.ucla.edu", true, "domain https test positive"), array("gopher://test.ucla.edu", true, "domain gopher stest positive"), array("http://www.foodnetworkstore.com/small-appliances/", false, "domain test negative"));
foreach ($test_urls as $test_url) {
$result = UrlParser::urlMemberSiteArray($test_url[0], $sites, "s");
$this->assertEqual($result, $test_url[1], $test_url[2]);
}
}
/**
* Page processors are allowed to extract up to MAX_LINKS_TO_EXTRACT
* This method attempts to cull from the doc_info struct the
* best MAX_LINKS_PER_PAGE. Currently, this is done by first removing
* links which of filetype or sites the crawler is forbidden from crawl.
* Then a crude estimate of the informaation contained in the links test:
* strlen(gzip(text)) is used to extract the best remaining links.
*
* @param array& $doc_info a string with a CrawlConstants::LINKS subarray
* This subarray in turn contains url => text pairs.
* @param string $field field for links default is CrawlConstants::LINKS
* @param int $member_cache_time says how long allowed and disallowed url
* info should be caches by urlMemberSiteArray
*/
function pruneLinks(&$doc_info, $field = CrawlConstants::LINKS, $member_cache_time = 0)
{
if (!isset($doc_info[self::LINKS])) {
return;
}
$links = array();
$allowed_name = "a" . $member_cache_time;
$disallowed_name = "d" . $member_cache_time;
foreach ($doc_info[$field] as $url => $text) {
$doc_type = UrlParser::getDocumentType($url);
if (!in_array($doc_type, $this->all_file_types)) {
$doc_type = "unknown";
}
if (!in_array($doc_type, $this->indexed_file_types)) {
continue;
}
if ($this->restrict_sites_by_url) {
if (!UrlParser::urlMemberSiteArray($url, $this->allowed_sites, $allowed_name)) {
continue;
}
}
if (UrlParser::urlMemberSiteArray($url, $this->disallowed_sites, $disallowed_name)) {
continue;
}
$links[$url] = $text;
}
$doc_info[$field] = UrlParser::pruneLinks($links);
}
/**
* Checks if the $url is from a site which has an hourly quota to download.
* If so, it bumps the quota count and return true; false otherwise.
* This method also resets the quota queue every over
*
* @param string $url to check if within quota
* @return bool whether $url exceeds the hourly quota of the site it is from
*/
function withinQuota($url)
{
if (!($site = UrlParser::urlMemberSiteArray($url, $this->quota_sites_keys, "q" . $this->allow_disallow_cache_time, true))) {
return true;
}
list($quota, $current_count) = $this->quota_sites[$site];
if ($current_count < $quota) {
$this->quota_sites[$site] = array($quota, $current_count + 1);
$flag = true;
} else {
$flag = false;
}
if ($this->quota_clear_time + ONE_HOUR < time()) {
$this->quota_clear_time = time();
foreach ($this->quota_sites as $site => $info) {
list($quota, ) = $info;
$this->quota_sites[$site] = array($quota, 0);
}
}
return $flag;
}
/**
* This method adds robots metas to or removes entirely a summary
* produced by a text page processor or its subsclasses depending on
* whether the summary title and description satisfy various rules
* in $this->filter_rules
*
* @param array& $summary the summary data produced by the relevant page
* processor's handle method; modified in-place.
* @param string $url the url where the summary contents came from
*/
function pageSummaryProcessing(&$summary, $url)
{
$sites = array_keys($this->filter_rules);
$filter_rules = $this->filter_rules;
$rules = $filter_rules['default'] ? $filter_rules['default'] : array();
foreach ($sites as $site) {
if ($site == "default") {
continue;
}
$sign = $site[0] == '-' ? false : true;
if (!$sign || $site[0] == '+') {
$check_url = substr($site, 1);
} else {
$check_url = $site;
}
if ($sign && UrlParser::urlMemberSiteArray($url, array($check_url), $url . $check_url) || !$sign && !UrlParser::urlMemberSiteArray($url, array($check_url), $url . $check_url)) {
$rules = array_merge($rules, $filter_rules[$site]);
}
}
foreach ($rules as $rule) {
$preconditions = $rule["PRECONDITIONS"];
$actions = $rule["ACTIONS"];
$filter_flag = $this->checkFilter($preconditions, $summary[self::TITLE], $summary[self::DESCRIPTION]);
if ($filter_flag) {
if (in_array("NOPROCESS", $actions)) {
crawlLog(" Word filter plugin removed page.");
$summary = false;
break;
} else {
if (!isset($summary[self::ROBOT_METAS])) {
$summary[self::ROBOT_METAS] = array();
}
$summary[self::ROBOT_METAS] += $actions;
}
}
}
}
