scraping-service | REST API for scraping dynamic websites using Node | Scraper library
kandi X-RAY | scraping-service Summary
kandi X-RAY | scraping-service Summary
Scraping Service is a REST API for scraping dynamic websites using Node.js, Puppeteer and Cheerio.
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QUESTION
I'm learning unit tests, and I've covered pretty much the basics.
Now I'm trying to test my scraper. My initial function involves multiple scrapers, but i wanted to check if each scraper works properly. The output of the test (to test be successful) should be if the return has an [{},{},...,{}]
- array of objects. I really cant know what is inside of the objects(data is always different), but it's always a array of objects.
Now what my question is: How to properly do this? I've tried in multiple ways, and my test always fails. Closes that I've been is this solution:
...ANSWER
Answered 2021-Feb-23 at 11:06You can make use of typeof
in this case like so :-
QUESTION
So I've finished my backend and frontend part of the project.
Now big aspect of my project is scraper function, which is implemented in the backend side of the code. Right now, I need to open VS code every day, and run a function which will trigger the scrapers. Now I've researched about, and Azure has a function apps which has a scheduled function.
Now what I want is: I want just to call a file inside my Azure repo. My backend and frontend are in the different repos, and I want to run file scraping-service.js
inside scraping
folder in order to scrape data and insert the data into the db.
Now normally I run pipeline with azure-service.yml
which has its own configuration for running my project. Is any way to implement this function to run just scraping-service.js
at certain time of the day?
Thanks!
...ANSWER
Answered 2021-Feb-22 at 07:33The normal way is to create an azure devops pipeline that deploys the code you want to run to an azure function when the code changes. So put the code of scraping-service.js
in the function or have the function call the method in scraping-service.js
. See the docs
Although there might be ways to run the code in an Azure Devops pipeline I don't think it is meant to run application code. You won't have the monitoring capabilities an azure function gives you, nor the availability of scaling, configuration and all the thing Azure Functions provides.
QUESTION
So I've been working on a scraper project.
Now I've implemented many things but I've been stuck on this one thing.
So first let me explain workflow: Scrapers are called in scraping-service
module, where I wait for the promise of the functions called to be resolved. Data is fetched in scrapers, and passed to the data_functions
object where data is: merged, validated and inserted into DB.
Now here is the code:
scraping-service
ANSWER
Answered 2021-Feb-18 at 08:25Are you missing return/await statements from inside your promise/async statements, especially when your last statement is also a promise?
Without that, you may be simply asking the promise to be executed at a later time, rather than returning the result and making $.all() wait for it.
QUESTION
I've been working on a scraper function.
Now about the app: there are two scrapers, that scrape data about apartments from two pages. Now when data is finished scraping it's been passed to mergeData
function, where the goal is to merge all the arrays of objects, that are passed from scrapers - into one single array with all objects from the scrapers, and then to be passed to insert function, to be inserted into the DB.
Now here is one of the scrapers
...ANSWER
Answered 2021-Feb-17 at 19:22QUESTION
I'm super new to node and coding in general so please forgive me. I am trying to use weld scraping service, but I am using npm. To run, it says to use a yarn command: yarn dev # development
. Is there a way I can run the same command with npm? I tried npm install dev # development
, but it threw an error for the #
. I tried downloading the contents of the repository first and then running, and got the same result. I tried researching what #
means in yarn, or in terminal, and the only thing I found is in a shell script it shows that you are the superuser?
ANSWER
Answered 2020-Apr-14 at 03:04First of all Yarn is a package manager created by Facebook as an alternative to npm. It looks like the package you are trying to install can not be installed with npm. "npm install dev # development" will not work because it is not the format used by npm when you are trying to install some package. If the objective is to scrap a web site I recommend you to use some other popular npm packages as axios cheerio. You can use "npm install axios cheerio" to use them.
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