function go()
{
connectToDb($db);
$starting_time = $this->getmicrotime();
// Init, split given URL into host, port, path and file a.s.o.
$url_parts = PHPCrawlerUtils::splitURL($this->url_to_crawl);
// Set base-host and base-path "global" for this class,
// we need it very often (i guess at this point...)
$this->base_path = $url_parts["path"];
$this->base_host = $url_parts["host"];
$this->base_domain = $url_parts["domain"];
// If the base port wasnt set by the user ->
// take the one from the given start-URL.
if ($this->base_port == "") {
$this->base_port = $url_parts["port"];
}
// if the base-port WAS set by the user
$url_parts["port"] = $this->base_port;
// Reset the base_url
$this->url_to_crawl = PHPCrawlerUtils::rebuildURL($url_parts);
$this->url_to_crawl = PHPCrawlerUtils::normalizeURL($this->url_to_crawl);
// Init counters
$links_followed = 0;
$files_received = 0;
// Put the first url into our main-array
$tmp[0]["url_rebuild"] = $this->url_to_crawl;
PHPCrawlerUtils::removeMatchingLinks($tmp, $this->not_follow_matches);
if (isset($tmp[0]["url_rebuild"]) && $tmp[0]["url_rebuild"] != "") {
PHPCrawlerUtils::addToArray($tmp, $this->urls_to_crawl, $this->url_map, $this->store_extended_linkinfo);
}
// MAIN-LOOP -------------------------------------------------------------------
// It works like this:
// The first loop looks through all the "Priority"-arrays and checks if any
// of these arrays is filled with URLS.
for ($pri_level = $this->max_priority_level + 1; $pri_level > -1; $pri_level--) {
// Yep. Found a priority-array with at least one URL
if (isset($this->urls_to_crawl[$pri_level]) && !isset($stop_crawling)) {
// Now "process" all URLS in this priroity-array
@reset($this->urls_to_crawl[$pri_level]);
while (list($key) = @each($this->urls_to_crawl[$pri_level])) {
$all_start = $this->getmicrotime();
$stop_crawling_this_level = false;
// init
// Request URL (crawl())
unset($page_data);
if (!isset($this->urls_to_crawl[$pri_level][$key]["referer_url"])) {
$this->urls_to_crawl[$pri_level][$key]["referer_url"] = "";
}
if ($db) {
incrementHttpRequests($db, $this->testId);
}
//Increment number of HTTP requests sent as fsockopen is called next
$page_data = $this->pageRequest->receivePage($this->urls_to_crawl[$pri_level][$key]["url_rebuild"], $this->urls_to_crawl[$pri_level][$key]["referer_url"]);
// If the request-object just irnored the URL ->
// -> Stop and remove URL from Array
if ($page_data == false) {
unset($this->urls_to_crawl[$pri_level][$key]);
continue;
}
$links_followed++;
// Now $page_data["links_found"] contains all found links at this point
// Check if a "<base href.."-tag is given in the source and xtract
// the base URL
// !! Doesnt have to be rebuild cause it only can be a full
// qualified URL !!
$base_url = PHPCrawlerUtils::getBasePathFromTag($page_data["source"]);
if ($base_url == "") {
$actual_url =& $this->urls_to_crawl[$pri_level][$key]["url_rebuild"];
} else {
$actual_url = $base_url;
}
// Set flag "content_found" if..content was found
if (isset($page_data["http_status_code"]) && $page_data["http_status_code"] == 200) {
$content_found = true;
}
// Check for a REDIRECT-header and if wanted, put it into the array of found links
$redirect = PHPCrawlerUtils::getRedirectLocation($page_data["header"]);
if ($redirect && $this->follow_redirects == true) {
$tmp_array["link_raw"] = $redirect;
$tmp_array["referer_url"] = $this->urls_to_crawl[$pri_level][$key]["url_rebuild"];
$page_data["links_found"][] = $tmp_array;
}
// Count files that have been received completly
if ($page_data["received"] == true) {
$files_received++;
}
// If traffic-limit is reached -> stop crawling
if ($page_data["traffic_limit_reached"] == true) {
$stop_crawling = true;
}
// Check if pagelimit is reached if set
// (and check WHICH page-limit was set)
if ($this->page_limit_all > 0) {
if ($this->page_limit_count_ct_only == true && $files_received >= $this->page_limit_all) {
$stop_crawling = true;
} elseif ($this->page_limit_count_ct_only == false && $links_followed >= $this->page_limit_all) {
$stop_crawling = true;
}
}
// Add the actual referer to the page_data array for the handlePageData-method
$page_data["refering_linktext"] =& $this->urls_to_crawl[$pri_level][$key]["linktext"];
$page_data["refering_link_raw"] =& $this->urls_to_crawl[$pri_level][$key]["link_raw"];
$page_data["refering_linkcode"] =& $this->urls_to_crawl[$pri_level][$key]["linkcode"];
// build new absolute URLs from found links
$page_data["links_found"] = PHPCrawlerUtils::buildURLs($page_data["links_found"], $actual_url);
// Call the overridable user-function here, but first
// "save" the found links from user-manipulation
$links_found = $page_data["links_found"];
$user_return = $this->handlePageData($page_data);
// Stop crawling if user returned a negative value
if ($user_return < 0) {
$stop_crawling = true;
$page_data["user_abort"] = true;
}
// Compare the found links with link-priorities set by the user
// and add the priority-level to our array $links_found
if ($this->benchmark == true) {
$bm_start = $this->getmicrotime();
}
PHPCrawlerUtils::addURLPriorities($links_found, $this->link_priorities);
if ($this->benchmark == true) {
echo "addUrlPriorities(): " . ($this->getmicrotime() - $bm_start) . "<br>";
}
// Here we can delete the tmp-file maybe created by the pageRequest-object
if (file_exists($this->pageRequest->tmp_file)) {
@unlink($this->pageRequest->tmp_file);
}
// Stop everything if a limit was reached
if (isset($stop_crawling)) {
break;
$pri_level = 1000;
}
// Remove links to other hosts if follow_mode is 2 or 3
if ($this->general_follow_mode == 2 || $this->general_follow_mode == 3) {
PHPCrawlerUtils::removeURLsToOtherHosts($links_found, $this->urls_to_crawl[$pri_level][$key]["url_rebuild"]);
}
// Remove links to other domains if follow_mode=1
if ($this->general_follow_mode == 1) {
PHPCrawlerUtils::removeURLsToOtherDomains($links_found, $this->urls_to_crawl[$pri_level][$key]["url_rebuild"]);
}
// Remove "pathUp"-links if follow_mode=3
// (fe: base-site: www.foo.com/bar/index.htm -> dont follow: www.foo.com/anotherbar/xyz)
if ($this->general_follow_mode == 3) {
PHPCrawlerUtils::removePathUpLinks($links_found, $this->url_to_crawl);
}
// If given, dont follow "not matching"-links
// (dont follow given preg_matches)
if (count($this->not_follow_matches) > 0) {
PHPCrawlerUtils::removeMatchingLinks($links_found, $this->not_follow_matches);
}
// If given, just follow "matching"-links
// (only follow given preg_matches)
if (count($this->follow_matches) > 0) {
$links_found =& PHPCrawlerUtils::removeNotMatchingLinks($links_found, $this->follow_matches);
}
// Add found and filtered links to the main_array urls_to_crawl
if ($this->benchmark == true) {
$bm_start = $this->getmicrotime();
}
PHPCrawlerUtils::addToArray($links_found, $this->urls_to_crawl, $this->url_map, $this->store_extended_linkinfo);
if ($this->benchmark == true) {
echo "addToArray(): " . ($this->getmicrotime() - $bm_start) . "<br>";
}
// If there is wasnt any content found so far (code 200) and theres
// a redirect location
// -> follow it, doesnt matter what follow-mode was choosen !
// (put it into the main-array !)
if (!isset($content_found) && $redirect != "" && $this->follow_redirects_till_content == true) {
$rd[0]["url_rebuild"] = phpcrawlerutils::buildURL($redirect, $actual_url);
$rd[0]["priority_level"] = 0;
PHPCrawlerUtils::addToArray($rd, $this->urls_to_crawl, $this->url_map, $this->store_extended_linkinfo);
}
// Now we remove the actual URL from the priority-array
unset($this->urls_to_crawl[$pri_level][$key]);
// Now we check if a priority-array with a higher priority
// contains URLS and if so, stop processing this pri-array and "switch" to the higher
// one
for ($pri_level_check = $this->max_priority_level + 1; $pri_level_check > $pri_level; $pri_level_check--) {
if (isset($this->urls_to_crawl[$pri_level_check]) && $pri_level_check > $pri_level) {
$stop_crawling_this_level = true;
}
}
// Stop crawling this level
if ($stop_crawling_this_level == true) {
$pri_level = $this->max_priority_level + 1;
break;
}
// Unset crawled URL, not nedded anymore
unset($this->urls_to_crawl[$pri_level][$key]);
// echo "All:".($this->getmicrotime()-$all_start);
}
// end of loop over priority-array
// If a priority_level was crawled completely -> unset the whole array
if ($stop_crawling_this_level == false) {
unset($this->urls_to_crawl[$pri_level]);
}
}
// end if priority-level exists
}
// end of main loop
// Loop stopped here, build report-array (status_return)
$this->status_return["links_followed"] = $links_followed;
$this->status_return["files_received"] = $files_received;
$this->status_return["bytes_received"] = $this->pageRequest->traffic_all;
$this->status_return["traffic_limit_reached"] = $page_data["traffic_limit_reached"];
if (isset($page_data["file_limit_reached"])) {
$this->status_return["file_limit_reached"] = $page_data["file_limit_reached"];
} else {
$this->status_return["file_limit_reached"] = false;
}
if (isset($page_data["user_abort"])) {
$this->status_return["user_abort"] = $page_data["user_abort"];
} else {
$this->status_return["user_abort"] = false;
}
if (isset($stop_crawling)) {
$this->status_return["limit_reached"] = true;
} else {
$this->status_return["limit_reached"] = false;
}
// Process-time
$this->status_return["process_runtime"] = $this->getMicroTime() - $starting_time;
// Average bandwith / throughput
$this->status_return["data_throughput"] = round($this->status_return["bytes_received"] / $this->status_return["process_runtime"]);
if ($this->firstCrawl) {
$query = "UPDATE tests SET status = 'Finished Crawling!' WHERE id = {$this->testId};";
if (connectToDb($db)) {
$db->query($query);
$duration = $this->status_return["process_runtime"];
$query = "UPDATE tests SET duration = {$duration} WHERE id = {$this->testId};";
$db->query($query);
}
}
}