Log list of files found but not crawled.
----------------------------------------
Key: NUTCH-649
URL: https://issues.apache.org/jira/browse/NUTCH-649
Project: Nutch
Issue Type: Improvement
Components: fetcher
Environment: any
Reporter: Jim
I use Nutch to find the location of executables on the web, but we do
not download the executables with Nutch. In order to get nutch to give the
location of files without downloading the files, I had to make a very small
patch to the code, but I think this change might be useful to others also. The
patch just logs files that are being filtered at the info level, although
perhaps it should be at the debug level.
I have included a svn diff with this change. Use cases would be to both use
as a diagnostic tool (let's see what we are skipping) as well as a way to find
content and links pointed to by a page or site without having to actually
download that content.
Index: ParseOutputFormat.java
===================================================================
--- ParseOutputFormat.java (revision 593619)
+++ ParseOutputFormat.java (working copy)
@@ -193,17 +193,20 @@
toHost = null;
}
if (toHost == null || !toHost.equals(fromHost)) { // external
links
+ LOG.info("filtering externalLink " + toUrl + " linked to by " +
fromUrl);
+
continue; // skip it
}
}
try {
toUrl = normalizers.normalize(toUrl,
URLNormalizers.SCOPE_OUTLINK); // normalize the url
- toUrl = filters.filter(toUrl); // filter the url
- if (toUrl == null) {
- continue;
- }
- } catch (Exception e) {
+
+ if (filters.filter(toUrl) == null) { // filter the url
+ LOG.info("filtering content " + toUrl + " linked to by "
+ fromUrl);
+ continue;
+ }
+ } catch (Exception e) {
continue;
}
CrawlDatum target = new CrawlDatum(CrawlDatum.STATUS_LINKED,
interval);
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