They can be accessed using special URL who ends with. The most famous part of the dark web are the hidden services built on the tor network. You’ll need to use a particular application or a special proxy. The Dark Web is a part of the web that you cannot access using a regular browser.The Deep Web is a part of the web non indexed, It means that you cannot find these websites using a search engine but you’ll need to access them by knowing the associated URL / IP address.It’s indexed by popular web crawler such as Google, Qwant, Duckduckgo, etc… The Surface Web, or Clear Web is the part that we browse everyday.The web is composed of 3 layers and we can think of it like an iceberg: I won’t be too technical to describe what the dark web is, since it may need is own article. What I wanted to do this time was to build a web crawler for the dark web. So I didn’t wanted to make a new one again. You may know that there is several successful web crawler running on the web such as google bot. The weakest link determines the strength of the whole chain. To be efficient, a distributed web crawler has to be well designed: it is important to eliminate as many bottlenecks as possible: as french admiral Olivier Lajous has said: Typically a efficient web crawler is designed to be distributed: instead of a single program that runs on a dedicated server, it’s multiples instances of several programs that run on several servers (eg: on the cloud) that allows better task repartition, increased performances and increased bandwidth.īut distributed softwares does not come without drawbacks: there is factors that may add extra latency to your program and may decrease performances such as network latency, synchronization problems, poorly designed communication protocol, etc… It’s basically the technology behind the famous google search engine. I have written several one in many languages such as C++, JavaScript (Node.JS), Python, … and I love the theory behind them.īut first of all, what is a web crawler? What is a web crawler? ⌗Ī web crawler is a computer program that browse the internet to index existing pages, images, PDF, … and allow user to search them using a search engine. I have been passionated by web crawler for a long time.
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