node-crawler | Nodejs爬虫工具,可抓取图片和文本,请查看另外一个项目 | Crawler library
kandi X-RAY | node-crawler Summary
kandi X-RAY | node-crawler Summary
Nodejs爬虫工具,可抓取图片和文本,请查看另外一个项目
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Trending Discussions on node-crawler
QUESTION
I have this jquery code using node-crawler
...ANSWER
Answered 2020-Jun-27 at 01:33The jquery each callback function actually takes 2 parameters. The first one is the array index, the second one is the item.
QUESTION
I am new to web crawling and I need some pointers about these two Node JS crawlers.
Aim: My aim is to crawl a website and obtain ONLY the internal (local) URLs within that domain. I am not interested in any page data or scraping. Just the URLs.
My Confusion: When using node-crawler or simplecrawler, do they have to download the entire pages before they return response? Is there a way to only find a URL, ping maybe perform some get request and if 200 response, just proceed to the next link without actually having to request the entire page data?
Is there any other NodeJS crawler or spider which can request and log only URLs? My concern is to make the crawl as lightweight as possible.
Thank you in advance.
...ANSWER
Answered 2018-May-08 at 09:01Crawling only the HTML pages of a website is usually a pretty lightweight process. It is also necessary to download the response bodies of HTML bodies to be able to crawl the site, since the HTML is searched for additional URLs.
simplecrawler is configurable so that you can avoid downloading images etc from a website. Here's a snippet that you can use to log the URLs that the crawler visits and avoid to download image resources.
QUESTION
I want to do the following:
- Go to a website
- Click on a button => a javascript function will change parts of the html
- Fetch some contents of the newly changed html
All these automatically
I tried several tools provided for nodejs including node-cralwer and PhantomJS
Currently, I have this code running in PhantomJS
...ANSWER
Answered 2018-Mar-25 at 19:27- Yes.
- Js in eveluate method will be executed in page, and there is an error in onclick listener.
You can open a page, open devtools, search for code in js sources.
QUESTION
After installing node-crawler in Node.js (not in the default directory) via the npm command, I tried to run the code in the "Usage" section but an error occurs when executing var Crawler = require("crawler");
and the VisualStudio Code debug console says Cannot find module 'crawler'
.
Does it happen because I installed crawler
in a custom location? How can I fix this?
ANSWER
Answered 2017-Jul-21 at 14:11npm install
will install a package locally. (--save
to have package appear in your dependencies.)
To have access to it from everywhere, you need to install it globally, using npm install -g
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