# How to use web crawling after you enter something to a online site?

**URL:** <https://discourse.processing.org/t/how-to-use-web-crawling-after-you-enter-something-to-a-online-site/21865>\
**Category:** Coding Questions\
**Created:** [June 14, 2020, 1:44pm UTC](https://discourse.processing.org/t/how-to-use-web-crawling-after-you-enter-something-to-a-online-site/21865 "2020-06-14T13:44:29Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![SilverPrevail](https://avatars.discourse-cdn.com/v4/letter/s/b5e925/32.png) [@SilverPrevail](https://discourse.processing.org/u/SilverPrevail)\
**Post date:** [June 14, 2020, 1:44pm UTC](https://discourse.processing.org/t/how-to-use-web-crawling-after-you-enter-something-to-a-online-site/21865/1 "2020-06-14T13:44:29Z")

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For instance, if I try to use a matrix calculator site ([https://matrixcalc.org/](https://matrixcalc.org/)) from my code, I have to enter my matrices into a site, and then use web crawling to get the answer.  
Like this example, I need to get the results of the site after I enter some information. Can someone tell me how to do this?

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**Author:** ![josephh](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/josephh/32/210_2.png) [@josephh](https://discourse.processing.org/u/josephh)\
**Post date:** [June 14, 2020, 7:59pm UTC](https://discourse.processing.org/t/how-to-use-web-crawling-after-you-enter-something-to-a-online-site/21865/2 "2020-06-14T19:59:59Z")

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Hi,

I never tested this, but a quick search on internet gives me this open source Java library for web crawling :

> **[yasserg/crawler4j](https://github.com/yasserg/crawler4j)**
>
> Open Source Web Crawler for Java. Contribute to yasserg/crawler4j development by creating an account on GitHub.

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**Author:** ![renec112](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/renec112/32/9168_2.png) [@renec112](https://discourse.processing.org/u/renec112)\
**Post date:** [June 15, 2020, 7:27am UTC](https://discourse.processing.org/t/how-to-use-web-crawling-after-you-enter-something-to-a-online-site/21865/3 "2020-06-15T07:27:39Z")

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There is a lot of python package that can help you with that as well 🙂

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**Author:** ![SilverPrevail](https://avatars.discourse-cdn.com/v4/letter/s/b5e925/32.png) [@SilverPrevail](https://discourse.processing.org/u/SilverPrevail)\
**Post date:** [June 16, 2020, 7:30am UTC](https://discourse.processing.org/t/how-to-use-web-crawling-after-you-enter-something-to-a-online-site/21865/4 "2020-06-16T07:30:29Z")

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Uhh, like what? Can you please explain more accurately? I am almost new to processing, and also new to web crawling… Please help ;-;

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**Author:** ![renec112](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/renec112/32/9168_2.png) [@renec112](https://discourse.processing.org/u/renec112)\
**Post date:** [June 16, 2020, 8:38am UTC](https://discourse.processing.org/t/how-to-use-web-crawling-after-you-enter-something-to-a-online-site/21865/5 "2020-06-16T08:38:45Z")

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Not sure what you want to create or how this issue is related to processing.  
If you need to get some matrix calculations, why not import a math module to do it for you? web crawling is much slower and unreliable anyways.

again i’m the python guy so I would suggest the [sympy package](https://docs.sympy.org/latest/tutorial/matrices.html).

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<div class="post-metadata">

**Author:** ![SilverPrevail](https://avatars.discourse-cdn.com/v4/letter/s/b5e925/32.png) [@SilverPrevail](https://discourse.processing.org/u/SilverPrevail)\
**Post date:** [June 17, 2020, 12:58am UTC](https://discourse.processing.org/t/how-to-use-web-crawling-after-you-enter-something-to-a-online-site/21865/6 "2020-06-17T00:58:03Z")

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the matrix one was just a example. What I genuinely wanted to do was to use web-crawling after you entered something to a website.  
Also, I want to use this at processing, so I thought this was related to it.