ILSP Focused Crawler

h1. Getting Started

Once you build or download an ilsp-fc runnable jar, you can run it like this

java -jar ilsp-fc-1.1-jar-with-dependencies.jar

There are several settings that influence the crawling process and can be defined in a configuration file before the crawling process. The default configuration file is crawler_config.xml and is included in the ilsp-fc runnable jar. Two typical customized examples are FMC_config.xml for monolingual crawls and FBC_config.xml for bilingual crawls.

Some of the settings can also be overriden using options of the ilsp-fc runnable jar, as follows:

-a :user agent name (required)
-type : the type of crawling. Crawling for monolingual (m) or parallel (p).
-cfg : the configuration file that will be used instead of the default (see crawler_config.xml above).
-c : the crawl duration in minutes. Since the crawler runs in cycles (during which links stored at the top of
the crawler’s frontier are extracted and new links are examined) it is very likely that the defined time
will expire during a cycle run. Then, the crawler will stop only after the end of the running cycle.
The default value is 10 minutes.
-n : the crawl duration in cycles. The default is 1. It is proposed to use this parameter for testing purposes
-t : the number of threads that will be used to fetch web pages in parallel.
-f : forces the crawler to start a new job (required)
-lang : the targeted language in case of monolingual crawling (required).
-l1 : the first targeted language in case of bilingual crawling (required).
-l2 : the second targeted language in case of bilingual crawling (required).

-u : the text file that contains the seed URLs that will initialize the crawler. In case of blingual crawling
the list should contain only 1 or 2 URLs from the same web doamin.

-tc : domain definition
-d : forces the crawler to stay in a web site (i.e. starts from a web site and extracts only links to pages
inside the same web site). It should be used only for monolingual crawling.

h2. Run a monolingual crawl

java -jar ilsp-fc-1.1-jar-with-dependencies.jar crawlandexport -a vpapa@ilsp.gr \
-cfg FMC_config.xml -t 10 -type m -c 10 -lang de -of output_test1_list.txt \
-ofh output_test1_list.txt.html -tc Automotive-seed-terms-de.txt \
-u Automotive-seed-urls.txt -xslt -f -k

h2. Run a bilingual crawl

java -jar ilsp-fc-1.1-jar-with-dependencies.jar crawlandexport -a test1 -c 10 -f -k -l1 de -l2 it \
-t 10 -of test_HS_DE-IT_output.txt -ofh test_HS_DE-IT_output.txt.html -tc HS_DE-IT_topic.txt \
-type p -xslt -u seed_suva.txt -cfg FBC_config.xml

h2. Example of java code

package gr.ilsp.fmc.classifier;

public enum ClassifierCounters {
CLASSIFIER_DOCUMENTS_PASSED, // successfully classified a document.
CLASSIFIER_DOCUMENTS_FAILED, // failed to classify a document
CLASSIFIER_DOCUMENTS_ABORTED,
CLASSIFIER_TIME
}

<?xml version="1.0" encoding="UTF-8"?>


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