protected void addHeaderLink(CrawlURI curi, Header loc) {
if (loc == null) {
// If null, return without adding anything.
return;
}
// TODO: consider possibility of multiple headers
try {
/**
* 302重定向使用自定义的方法存储link
*
* @modify: wuliufu
* @since : 2012-05-11
*/
curi.createAndAddLocationLink(
curi.getVia(), loc.getValue(), loc.getName() + ":", Link.REFER_HOP);
if (curi.getObject(URLInfo.ATTACH) != null) {
UURI outUURI = UURIFactory.getInstance(curi.getUURI(), loc.getValue());
logger.debug(
"ParseHTTP: curi = "
+ curi.getUURI().toString()
+ "&& "
+ loc.getName()
+ "="
+ outUURI.toString());
curi.putObject(outUURI.toString(), curi.getObject(URLInfo.ATTACH));
}
numberOfLinksExtracted++;
} catch (URIException e) {
// There may not be a controller (e.g. If we're being run
// by the extractor tool).
if (getController() != null) {
getController().logUriError(e, curi.getUURI(), loc.getValue());
} else {
logger.info(curi + ", " + loc.getValue() + ": " + e.getMessage());
}
}
}
/**
* Add constant penalties for certain features of URI (and its 'via') that make it more
* delayable/skippable.
*
* @param curi CrawlURI to be assigned a cost
* @see org.archive.crawler.frontier.CostAssignmentPolicy#costOf(org.archive.modules.CrawlURI)
*/
public int costOf(CrawlURI curi) {
int cost = 1;
UURI uuri = curi.getUURI();
if (uuri.hasQuery()) {
// has query string
cost++;
int qIndex = uuri.toString().indexOf('?');
if (curi.flattenVia().startsWith(uuri.toString().substring(0, qIndex))) {
// non-query-string portion of URI is same as previous
cost++;
}
// TODO: other potential query-related cost penalties:
// - more than X query-string attributes
// - calendarish terms
// - query-string over certain size
}
// TODO: other potential path-based penalties
// - new path is simply extension of via path
// - many path segments
// TODO: other potential hops-based penalties
// - more than X hops
// - each speculative hop
return cost;
}
public boolean isPrerequisite(final CrawlURI curi) {
boolean result = false;
String curiStr = curi.getUURI().toString();
String loginUri = getPrerequisite(curi);
if (loginUri != null) {
try {
UURI uuri = UURIFactory.getInstance(curi.getUURI(), loginUri);
if (uuri != null && curiStr != null && uuri.toString().equals(curiStr)) {
result = true;
if (!curi.isPrerequisite()) {
curi.setPrerequisite(true);
logger.fine(curi + " is prereq.");
}
}
} catch (URIException e) {
logger.severe("Failed to uuri: " + curi + ", " + e.getMessage());
}
}
return result;
}
/* (non-Javadoc)
* @see org.archive.crawler.settings.refinements.Criteria#isWithinRefinementBounds(org.archive.crawler.datamodel.UURI, int)
*/
public boolean isWithinRefinementBounds(UURI uri) {
return (uri == null || uri == null) ? false : TextUtils.matches(regexp, uri.toString());
}