Arquivo.pt main goal is the preservation and access of web contents that are no longer available online. During the developing of the PWA IR (information retrieval) system we faced limitations in searching speed, quality of results, scalability and usability. To cope with this, we modified the archive-access project (http://archive-access.sourceforge.net/) to support our web archive IR requirements. Nutchwax, Nutch and Wayback’s code were adapted to meet the requirements. Several optimizations were added, such as simplifications in the way document versions are searched and several bottlenecks were resolved. The PWA search engine is a public service at http://archive.pt and a research platform for web archiving. As it predecessor Nutch, it runs over Hadoop clusters for distributed computing following the map-reduce paradigm. Its major features include fast full-text search, URL search, phrase search, faceted search (date, format, site), and sorting by relevance and date. The PWA search engine is highly scalable and its architecture is flexible enough to enable the deployment of different configurations to respond to the different needs. Currently, it serves an archive collection searchable by full-text with 180 million documents ranging between 1996 and 2010.
Based on this analysis the Justext package is better than newspaper3k. However, I saw one big problem and I could not find a solution. You have to give as input a list of stopwords that are language specific. So, If the language is different, Justext returns nothing.
VascoRatoFCCN
commented
2 years ago 
PedroG1515
commented
1 year ago
User feedback indicated that our current text extracting tool could have improved quality by implementing the newspaper3k library.
We should test this out and see whether we should replace our service with this one, or maybe complementing it with this one.