/**
* Gets the next doc from the iterator
* @param bool $no_process do not do any processing on page data
* @return array associative array for doc or string if no_process true
*/
function nextPage($no_process = false)
{
static $minimal_regexes = false;
static $first_call = true;
if ($first_call) {
$this->initializeSubstitutions($this->header['base_address']);
}
$page_info = $this->getNextTagData("page");
if ($no_process) {
return $page_info;
}
$dom = new DOMDocument();
@$dom->loadXML($page_info);
$site = array();
$pre_url = $this->getTextContent($dom, "/page/title");
$pre_url = str_replace(" ", "_", $pre_url);
$site[self::URL] = $this->header['base_address'] . $pre_url;
$site[self::IP_ADDRESSES] = array($this->header['ip_address']);
$pre_timestamp = $this->getTextContent($dom, "/page/revision/timestamp");
$site[self::MODIFIED] = date("U", strtotime($pre_timestamp));
$site[self::TIMESTAMP] = time();
$site[self::TYPE] = "text/html";
$site[self::HEADER] = "mediawiki_bundle_iterator extractor";
$site[self::HTTP_CODE] = 200;
$site[self::ENCODING] = "UTF-8";
$site[self::SERVER] = "unknown";
$site[self::SERVER_VERSION] = "unknown";
$site[self::OPERATING_SYSTEM] = "unknown";
$site[self::PAGE] = "<html lang='" . $this->header['lang'] . "' >\n" . "<head><title>{$pre_url}</title>\n" . WIKI_PAGE_STYLES . "\n</head>\n" . "<body><h1>{$pre_url}</h1>\n";
$pre_page = $this->getTextContent($dom, "/page/revision/text");
$current_hash = crawlHash($pre_page);
if ($first_call) {
$this->saveCheckPoint();
//ensure we remember to advance one on fail
$first_call = false;
}
$pre_page = $this->parser->parse($pre_page, false, true);
$pre_page = preg_replace("/{{Other uses}}/i", "<div class='indent'>\"\$1\". (<a href='" . $site[self::URL] . "_(disambiguation)'>{$pre_url}</a>)</div>", $pre_page);
$site[self::PAGE] .= $pre_page;
$site[self::PAGE] .= "\n</body>\n</html>";
$site[self::HASH] = FetchUrl::computePageHash($site[self::PAGE]);
$site[self::WEIGHT] = ceil(max(log(strlen($site[self::PAGE]) + 1, 2) - 10, 1));
return $site;
}
/**
* Gets the next doc from the iterator
* @param bool $no_process if true then just return page string found
* not any additional meta data.
* @return mixed associative array for doc or just string of doc
*/
function nextPage($no_process = false)
{
if (!$this->checkFileHandle()) {
return NULL;
}
$matches = array();
while (preg_match($this->delimiter, $this->buffer, $matches, PREG_OFFSET_CAPTURE) != 1) {
crawlTimeoutLog("..still looking for a page in local buffer");
$block = $this->getFileBlock();
if (!$block || !$this->checkFileHandle() || $this->checkEof()) {
return NULL;
}
$this->buffer .= $block;
}
$delim_len = strlen($matches[0][0]);
$pos = $matches[0][1] + $delim_len;
$page_pos = $this->start_delimiter == "" ? $pos : $pos - $delim_len;
$page = substr($this->buffer, 0, $page_pos);
if ($this->end_delimiter == "") {
$page = $this->remainder . $page;
$this->remainder = $matches[0][0];
}
$this->buffer = substr($this->buffer, $pos + $delim_len);
if ($this->start_delimiter != "") {
$matches = array();
if (preg_match($this->start_delimiter, $this->buffer, $matches, PREG_OFFSET_CAPTURE) != 1) {
if (isset($matches[0][1])) {
$page = substr($page, $matches[0][1]);
}
}
}
if ($no_process == true) {
return $page;
}
$site = array();
$site[self::HEADER] = "text_archive_bundle_iterator extractor";
$site[self::IP_ADDRESSES] = array("0.0.0.0");
$site[self::TIMESTAMP] = date("U", time());
$site[self::TYPE] = "text/plain";
$site[self::PAGE] = $page;
$site[self::HASH] = FetchUrl::computePageHash($page);
$site[self::URL] = "record:" . webencode($site[self::HASH]);
$site[self::HTTP_CODE] = 200;
$site[self::ENCODING] = $this->encoding;
$site[self::SERVER] = "unknown";
$site[self::SERVER_VERSION] = "unknown";
$site[self::OPERATING_SYSTEM] = "unknown";
$site[self::WEIGHT] = 1;
return $site;
}
/**
* Gets the next doc from the iterator
* @param bool $no_process do not do any processing on page data
* @return array associative array for doc or string if no_process true
*/
function nextPage($no_process = false)
{
if (!$this->checkFileHandle()) {
return NULL;
}
$tag_data = $this->getNextTagsData(array("Topic", "ExternalPage"));
if (!$tag_data) {
return false;
}
list($page_info, $tag) = $tag_data;
if ($no_process) {
return $page_info;
}
$page_info = str_replace("r:id", "id", $page_info);
$page_info = str_replace("r:resource", "resource", $page_info);
$page_info = str_replace("d:Title", "Title", $page_info);
$page_info = str_replace("d:Description", "Description", $page_info);
$dom = new DOMDocument();
$dom->loadXML($page_info);
$processMethod = "process" . $tag;
$site[self::IP_ADDRESSES] = array($this->header['ip_address']);
$site[self::MODIFIED] = time();
$site[self::TIMESTAMP] = time();
$site[self::TYPE] = "text/html";
$site[self::HEADER] = "odp_rdf_bundle_iterator extractor";
$site[self::HTTP_CODE] = 200;
$site[self::ENCODING] = "UTF-8";
$site[self::SERVER] = "unknown";
$site[self::SERVER_VERSION] = "unknown";
$site[self::OPERATING_SYSTEM] = "unknown";
$this->{$processMethod}($dom, $site);
$site[self::HASH] = FetchUrl::computePageHash($site[self::PAGE]);
return $site;
}
/**
* Processes an array of downloaded web pages with the appropriate page
* processor.
*
* Summary data is extracted from each non robots.txt file in the array.
* Disallowed paths and crawl-delays are extracted from robots.txt files.
*
* @param array $site_pages a collection of web pages to process
* @return array summary data extracted from these pages
*/
function processFetchPages($site_pages)
{
$PAGE_PROCESSORS = $this->page_processors;
crawlLog("Start process pages... Current Memory:" . memory_get_usage());
$start_time = microtime();
$prefix = $this->fetcher_num . "-";
$stored_site_pages = array();
$summarized_site_pages = array();
$num_items = $this->web_archive->count;
$i = 0;
foreach ($site_pages as $site) {
$response_code = $site[self::HTTP_CODE];
$was_error = false;
if ($response_code < 200 || $response_code >= 300) {
crawlLog($site[self::URL] . " response code {$response_code}");
$host = UrlParser::getHost($site[self::URL]);
if (!isset($this->hosts_with_errors[$host])) {
$this->hosts_with_errors[$host] = 0;
}
if ($response_code >= 400 || $response_code < 100) {
// < 100 will capture failures to connect which are returned
// as strings
$was_error = true;
$this->hosts_with_errors[$host]++;
}
/* we print out errors to std output. We still go ahead and
process the page. Maybe it is a cool error page, also
this makes sure we don't crawl it again
*/
}
// text/robot is my made up mimetype for robots.txt files
$was_robot_error = false;
if (isset($site[self::ROBOT_PATHS])) {
if (!$was_error) {
$type = "text/robot";
} else {
$type = $site[self::TYPE];
if ($response_code != 404) {
/*
disallow crawling if robots.txt was any error other
that not found
*/
$was_robot_error = true;
$site[self::ROBOT_PATHS][] = "/";
}
}
} else {
if (isset($site[self::FILE_NAME])) {
$extension = UrlParser::getDocumentType($site[self::FILE_NAME]);
if ($extension == $this->programming_language_extension['java']) {
$type = "text/java";
} else {
if ($extension == $this->programming_language_extension['py']) {
$type = "text/py";
} else {
$type = $site[self::TYPE];
}
}
} else {
$type = $site[self::TYPE];
}
}
$handled = false;
/*deals with short URLs and directs them to the original link
for robots.txt don't want to introduce stuff that can be
mis-parsed (we follow redirects in this case anyway) */
if (isset($site[self::LOCATION]) && count($site[self::LOCATION]) > 0 && strcmp($type, "text/robot") != 0) {
array_unshift($site[self::LOCATION], $site[self::URL]);
$tmp_loc = array_pop($site[self::LOCATION]);
$tmp_loc = UrlParser::canonicalLink($tmp_loc, $site[self::URL]);
$site[self::LOCATION] = array_push($site[self::LOCATION], $tmp_loc);
$doc_info = array();
$doc_info[self::LINKS][$tmp_loc] = "location:" . $site[self::URL];
$doc_info[self::LOCATION] = true;
$doc_info[self::DESCRIPTION] = $site[self::URL] . " => " . $tmp_loc;
$doc_info[self::PAGE] = $doc_info[self::DESCRIPTION];
$doc_info[self::TITLE] = $site[self::URL];
$text_data = true;
if (!isset($site[self::ENCODING])) {
$site[self::ENCODING] = "UTF-8";
}
$handled = true;
} else {
if (isset($PAGE_PROCESSORS[$type])) {
$page_processor = $PAGE_PROCESSORS[$type];
if (generalIsA($page_processor, "TextProcessor")) {
$text_data = true;
} else {
$text_data = false;
}
} else {
crawlLog("No page processor for mime type: " . $type);
crawlLog("Not processing: " . $site[self::URL]);
continue;
}
}
if (!$handled) {
if (isset($this->plugin_processors[$page_processor])) {
$processor = new $page_processor($this->plugin_processors[$page_processor], $this->max_description_len, $this->summarizer_option);
} else {
$processor = new $page_processor(array(), $this->max_description_len, $this->summarizer_option);
}
}
if (isset($site[self::PAGE]) && !$handled) {
if (!isset($site[self::ENCODING])) {
$site[self::ENCODING] = "UTF-8";
}
//if not UTF-8 convert before doing anything else
if (isset($site[self::ENCODING]) && $site[self::ENCODING] != "UTF-8" && $site[self::ENCODING] != "" && generalIsA($page_processor, "TextProcessor")) {
if (!@mb_check_encoding($site[self::PAGE], $site[self::ENCODING])) {
crawlLog(" MB_CHECK_ENCODING FAILED!!");
}
crawlLog(" Converting from encoding " . $site[self::ENCODING] . "...");
//if HEBREW WINDOWS-1255 use ISO-8859 instead
if (stristr($site[self::ENCODING], "1255")) {
$site[self::ENCODING] = "ISO-8859-8";
crawlLog(" using encoding " . $site[self::ENCODING] . "...");
}
if (stristr($site[self::ENCODING], "1256")) {
$site[self::PAGE] = w1256ToUTF8($site[self::PAGE]);
crawlLog(" using Yioop hack encoding ...");
} else {
$site[self::PAGE] = @mb_convert_encoding($site[self::PAGE], "UTF-8", $site[self::ENCODING]);
}
}
crawlLog(" Using Processor..." . $page_processor);
if (isset($site[self::REPOSITORY_TYPE]) && $site[self::REPOSITORY_TYPE] == self::REPOSITORY_GIT) {
$tmp_url_store = $site[self::URL];
$site[self::URL] = $site[self::FILE_NAME];
}
$doc_info = $processor->handle($site[self::PAGE], $site[self::URL]);
if (isset($site[self::REPOSITORY_TYPE]) && $site[self::REPOSITORY_TYPE] == self::REPOSITORY_GIT) {
$site[self::URL] = $tmp_url_store;
}
if (!$doc_info) {
crawlLog(" Processing Yielded No Data For: " . $site[self::URL]);
}
if ($page_processor != "RobotProcessor" && !isset($doc_info[self::JUST_METAS])) {
$this->pruneLinks($doc_info, CrawlConstants::LINKS, $start_time);
}
} else {
if (!$handled) {
$doc_info = false;
}
}
$not_loc = true;
if ($doc_info) {
$site[self::DOC_INFO] = $doc_info;
if (isset($doc_info[self::LOCATION])) {
$site[self::HASH] = crawlHash(crawlHash($site[self::URL], true) . "LOCATION", true);
$not_loc = false;
}
$site[self::ROBOT_INSTANCE] = $prefix . ROBOT_INSTANCE;
if (!is_dir(CRAWL_DIR . "/cache")) {
mkdir(CRAWL_DIR . "/cache");
$htaccess = "Options None\nphp_flag engine off\n";
file_put_contents(CRAWL_DIR . "/cache/.htaccess", $htaccess);
}
if ($type == "text/robot" && isset($doc_info[self::PAGE])) {
$site[self::PAGE] = $doc_info[self::PAGE];
}
if ($text_data) {
if (isset($doc_info[self::PAGE])) {
$site[self::PAGE] = $doc_info[self::PAGE];
} else {
$site[self::PAGE] = NULL;
}
if ($not_loc) {
$content = $doc_info[self::DESCRIPTION];
$site[self::HASH] = FetchUrl::computePageHash($content);
}
} else {
$site[self::HASH] = FetchUrl::computePageHash($site[self::PAGE]);
}
if (isset($doc_info[self::WORD_CLOUD])) {
$site[self::WORD_CLOUD] = $doc_info[self::WORD_CLOUD];
} else {
$site[self::WORD_CLOUD] = NULL;
}
if (isset($doc_info[self::CRAWL_DELAY])) {
$site[self::CRAWL_DELAY] = $doc_info[self::CRAWL_DELAY];
}
if (isset($doc_info[self::ROBOT_PATHS]) && !$was_error) {
$site[self::ROBOT_PATHS] = $doc_info[self::ROBOT_PATHS];
}
if (!isset($site[self::ROBOT_METAS])) {
$site[self::ROBOT_METAS] = array();
}
if (isset($doc_info[self::ROBOT_METAS])) {
$site[self::ROBOT_METAS] = array_merge($site[self::ROBOT_METAS], $doc_info[self::ROBOT_METAS]);
}
//here's where we enforce NOFOLLOW
if (in_array("NOFOLLOW", $site[self::ROBOT_METAS]) || in_array("NONE", $site[self::ROBOT_METAS])) {
$site[self::DOC_INFO][self::LINKS] = array();
}
if (isset($doc_info[self::AGENT_LIST])) {
$site[self::AGENT_LIST] = $doc_info[self::AGENT_LIST];
}
$this->copySiteFields($i, $site, $summarized_site_pages, $stored_site_pages);
$summarized_site_pages[$i][self::URL] = strip_tags($site[self::URL]);
if (isset($site[self::REPOSITORY_TYPE]) && $site[self::REPOSITORY_TYPE] == self::REPOSITORY_GIT) {
$summarized_site_pages[$i][self::TITLE] = $site[self::FILE_NAME];
} else {
$summarized_site_pages[$i][self::TITLE] = strip_tags($site[self::DOC_INFO][self::TITLE]);
// stripping html to be on the safe side
}
if (!isset($site[self::REPOSITORY_TYPE])) {
if ($was_robot_error) {
$site[self::DOC_INFO][self::DESCRIPTION] = "There was an HTTP error in trying to download " . "this robots.txt file, so all paths to this site " . "were dsallowed by Yioop.\n" . $site[self::DOC_INFO][self::DESCRIPTION];
}
$summarized_site_pages[$i][self::DESCRIPTION] = strip_tags($site[self::DOC_INFO][self::DESCRIPTION]);
} else {
$summarized_site_pages[$i][self::DESCRIPTION] = $site[self::DOC_INFO][self::DESCRIPTION];
}
if (isset($site[self::DOC_INFO][self::JUST_METAS]) || isset($site[self::ROBOT_PATHS])) {
$summarized_site_pages[$i][self::JUST_METAS] = true;
}
if (isset($site[self::DOC_INFO][self::META_WORDS])) {
if (!isset($summarized_site_pages[$i][self::META_WORDS])) {
$summarized_site_pages[$i][self::META_WORDS] = $site[self::DOC_INFO][self::META_WORDS];
} else {
$summarized_site_pages[$i][self::META_WORDS] = array_merge($summarized_site_pages[$i][self::META_WORDS], $site[self::DOC_INFO][self::META_WORDS]);
}
}
if (isset($site[self::DOC_INFO][self::LANG])) {
if ($site[self::DOC_INFO][self::LANG] == 'en' && $site[self::ENCODING] != "UTF-8") {
$site[self::DOC_INFO][self::LANG] = guessLangEncoding($site[self::ENCODING]);
}
$summarized_site_pages[$i][self::LANG] = $site[self::DOC_INFO][self::LANG];
}
if (isset($site[self::DOC_INFO][self::LINKS])) {
$summarized_site_pages[$i][self::LINKS] = $site[self::DOC_INFO][self::LINKS];
}
if (isset($site[self::DOC_INFO][self::WORD_CLOUD])) {
$summarized_site_pages[$i][self::WORD_CLOUD] = $site[self::DOC_INFO][self::WORD_CLOUD];
}
if (isset($site[self::DOC_INFO][self::THUMB])) {
$summarized_site_pages[$i][self::THUMB] = $site[self::DOC_INFO][self::THUMB];
}
if (isset($site[self::DOC_INFO][self::SUBDOCS])) {
$this->processSubdocs($i, $site, $summarized_site_pages, $stored_site_pages);
}
if (isset($summarized_site_pages[$i][self::LINKS])) {
$summarized_site_pages[$i][self::LINKS] = UrlParser::cleanRedundantLinks($summarized_site_pages[$i][self::LINKS], $summarized_site_pages[$i][self::URL]);
}
if (!empty($this->classifiers)) {
Classifier::labelPage($summarized_site_pages[$i], $this->classifiers, $this->active_classifiers, $this->active_rankers);
}
if ($this->page_rule_parser != NULL) {
$this->page_rule_parser->executeRuleTrees($summarized_site_pages[$i]);
}
$metas = isset($summarized_site_pages[$i][self::ROBOT_METAS]) ? $summarized_site_pages[$i][self::ROBOT_METAS] : array();
if (array_intersect($metas, array("NOARCHIVE", "NOINDEX", "JUSTFOLLOW", "NONE")) != array()) {
$stored_site_pages[$i] = false;
}
$stored_site_pages[$i][self::INDEX] = $i;
$i++;
}
}
// end for
$num_pages = count($stored_site_pages);
$filter_stored = array_filter($stored_site_pages);
if ($num_pages > 0 && $this->cache_pages) {
$cache_page_partition = $this->web_archive->addPages(self::OFFSET, $filter_stored);
} else {
if ($num_pages > 0) {
$this->web_archive->addCount(count($filter_stored));
}
}
for ($i = 0; $i < $num_pages; $i++) {
$summarized_site_pages[$i][self::INDEX] = $num_items + $i;
}
foreach ($filter_stored as $stored) {
$i = $stored[self::INDEX];
if (isset($stored[self::OFFSET])) {
$summarized_site_pages[$i][self::OFFSET] = $stored[self::OFFSET];
$summarized_site_pages[$i][self::CACHE_PAGE_PARTITION] = $cache_page_partition;
}
}
crawlLog(" Process pages time: " . changeInMicrotime($start_time) . " Current Memory: " . memory_get_usage());
return $summarized_site_pages;
}
/**
* Gets the next at most $num many docs from the iterator. It might return
* less than $num many documents if the partition changes or the end of the
* bundle is reached.
*
* @param int $num number of docs to get
* @param bool $no_process do not do any processing on page data
* @return array associative arrays for $num pages
*/
function nextPages($num, $no_process = false)
{
$pages = array();
$page_count = 0;
$db = $this->db;
$query = "{$this->sql} " . $db->limitOffset($this->limit, $num);
$result = $db->execute($query);
$i = 0;
while ($row = $db->fetchArray($result)) {
crawlTimeoutLog("..Still getting pages from archive iterator. At %s" . " of %s", $i, $num);
$page = "";
foreach ($row as $key => $value) {
$page .= "{$key}{$this->field_value_separator}" . "{$value}{$this->column_separator}";
}
if ($no_process) {
$pages[] = $page;
} else {
$site = array();
$site[self::HEADER] = "database_bundle_iterator extractor";
$site[self::IP_ADDRESSES] = array("0.0.0.0");
$site[self::TIMESTAMP] = date("U", time());
$site[self::TYPE] = "text/plain";
$site[self::PAGE] = $page;
$site[self::HASH] = FetchUrl::computePageHash($page);
$site[self::URL] = "record:" . webencode($site[self::HASH]);
$site[self::HTTP_CODE] = 200;
$site[self::ENCODING] = $this->encoding;
$site[self::SERVER] = "unknown";
$site[self::SERVER_VERSION] = "unknown";
$site[self::OPERATING_SYSTEM] = "unknown";
$site[self::WEIGHT] = 1;
$pages[] = $site;
}
$page_count++;
}
$this->limit += $page_count;
if ($page_count < $num) {
$this->end_of_iterator = true;
}
$this->saveCheckpoint();
return $pages;
}
/**
* Gets the next doc from the iterator
* @param bool $no_process do not do any processing on page data
* @return array associative array for doc or string if no_process true
*/
function nextPage($no_process = false)
{
if (!$this->checkFileHandle()) {
return NULL;
}
$indexable_records = array('response', 'resource');
do {
$this->getRecordStart();
$page_info = $this->getWarcHeaders();
if ($page_info == NULL || !isset($page_info[self::SIZE])) {
return NULL;
}
$length = intval($page_info[self::SIZE]);
$page_info[self::SIZE] = $length;
$header_and_page = ltrim($this->fileRead($length + 2));
$this->fileGets();
$this->fileGets();
if (!$header_and_page) {
return NULL;
}
} while (!in_array($page_info['warc-type'], $indexable_records) || substr($page_info[self::URL], 0, 4) == 'dns:');
//ignore warcinfo, request, metadata, revisit, etc. records
if ($no_process) {
return $header_and_page;
}
unset($page_info['line']);
unset($page_info['warc-type']);
$site = $page_info;
$site_contents = FetchUrl::parseHeaderPage($header_and_page);
$site = array_merge($site, $site_contents);
$site[self::HASH] = FetchUrl::computePageHash($site[self::PAGE]);
$site[self::WEIGHT] = 1;
if (!isset($site[self::TYPE])) {
$site[self::TYPE] = "text/plain";
}
return $site;
}
/**
* Gets the next doc from the iterator
* @param bool $no_process do not do any processing on page data
* @return array associative array for doc or string if no_process true
*/
function nextPage($no_process = false)
{
if (!$this->checkFileHandle()) {
return NULL;
}
do {
$page_info = $this->fileGets();
if (trim($page_info) == "") {
return NULL;
}
$info_parts = explode(" ", $page_info);
$num_parts = count($info_parts);
$length = intval($info_parts[$num_parts - 1]);
$header_and_page = $this->fileRead($length + 1);
if (!$header_and_page) {
return NULL;
}
} while (substr($page_info, 0, 3) == 'dns' || substr($page_info, 0, 8) == 'filedesc');
//ignore dns entries in arc and ignore first record
if ($no_process) {
return $header_and_page;
}
$site = array();
$site[self::URL] = $info_parts[0];
$site[self::IP_ADDRESSES] = array($info_parts[1]);
$site[self::TIMESTAMP] = date("U", strtotime($info_parts[2]));
$site[self::TYPE] = $info_parts[3];
$site_contents = FetchUrl::parseHeaderPage($header_and_page);
$site = array_merge($site, $site_contents);
$site[self::HASH] = FetchUrl::computePageHash($site[self::PAGE]);
$site[self::WEIGHT] = 1;
return $site;
}
