This gives the same upper limit to the live crawler and the big boy crawler, though the live crawler will reject items too large, and the big crawler will truncate at that point.
We should not wait until we've fetched robots.txt to decide whether we have any data to fetch! This makes the live crawler very slow and leads to unnecessary requests.
This change adds `Accept-Encoding: gzip` to all outbound requests from the live crawler and feed fetcher, and the corresponding decoding logic for the compressed response data.
The change addresses issue #136, save for making the fetcher's requests conditional.
Discovered feed URLs were given a double slash after their domain name in the DB. This will go away in the URL normalizer, so the URLs are still viable, but the commit fixes the issue regardless.
Feed discover is improved with by probing a few likely endpoints when no feed link tag is provided. To store the feed URLs, a sqlite database is added to each crawlset that stores a simple summary of the crawl job, including any feed URLs that have been discovered.
Solves issue #135
Previously, the sideloader did not generate a locality-sensitive hashCode for document details. This caused all documents from the same domain to be considered duplicates by the deduplication logic.
Added an additional filter step to ensure URLs with binary suffixes are excluded during crawling. This prevents unnecessary processing of non-HTML content, improving the efficiency of the link parsing process.
If the document's URL path is "/", a "special:root" meta flag is now added with the "Synthetic" bit set. This will help searching only for the root document of a website, neat stuff ahead :D
Centralized HTML feature handling with `applyFeatures` in StackexchangeSideloader and added dynamic synthetic term generation. Improved HTML structure in RedditSideloader and enhanced metadata processing with feature-based keywords. Updated DomainLinks to correctly compute link counts using individual link occurrences.
This update eliminates all occurrences of the OpenNLP token model from the setup script, configuration, and test files, as this model file is no longer used.
Introduced optional alias domain functionality in EdgeDomain class to handle domain variations such as "www" in the anchor tags code, as there are commonly a number of relevant but glancing misses in the atags data.
Adding a tracking message to the export actor means it's possible to run them in a precession.
Adding a new precession actor, and some GUI components for triggering exports.
The change also adds a heartbeat to the export process.
Add a check to ensure only documents with "text/html" content type are processed in FeedExporter, AtagExporter, and TermFrequencyExporter. This prevents non-HTML documents from being parsed and helps maintain data consistency and keep the memory usage down.
Normalize URLs by replacing en-dash with hyphen to prevent encoding errors. This ensures correct handling of a small subset of articles with improperly normalized UTF-8 paths. Added `normalizeUtf8` method to address this issue.
Fixes issue #109.
To avoid hammering the same invalid URLs for up to two months, URLs that fail to fetch correctly are on a dice roll added to a bad URLs table, that prevents further attempts at fetching them.
Since some of the export tasks have been memory hungry, sometimes killing the executor-services, they've been moved to a separate process that can be given a larger Xmx.
While doing this, the ProcessMainClass was given utilities for the boilerplate surrounding receiving mq requests and responding to them, some effort was also put toward making the process boot process a bit more uniform. It's still a bit heterogeneous between different processes, but a bit less so for now.
This is done by applying a large constant offset to the ordinals for the live crawled documents. The chosen value still permits upto 100k documents to be fetched for a single domain with the live crawler, which is ridiculously large.
