colly | Elegant Scraper and Crawler Framework for Golang | Crawler library

by gocolly Go Version: v2.1.0 License: Apache-2.0

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | colly Summary

colly is a Go library typically used in Automation, Crawler applications. colly has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Lightning Fast and Elegant Scraping Framework for Gophers. Colly provides a clean interface to write any kind of crawler/scraper/spider. With Colly you can easily extract structured data from websites, which can be used for a wide range of applications, like data mining, data processing or archiving.

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Quality

Security

License

Reuse

Support

colly has a medium active ecosystem.

It has 19706 star(s) with 1603 fork(s). There are 324 watchers for this library.

It had no major release in the last 12 months.

There are 144 open issues and 381 have been closed. On average issues are closed in 89 days. There are 25 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of colly is v2.1.0

Quality

colly has 0 bugs and 0 code smells.

Security

colly has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

colly code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

colly is licensed under the Apache-2.0 License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

colly releases are available to install and integrate.

Installation instructions, examples and code snippets are available.

It has 5025 lines of code, 258 functions and 54 files.

It has medium code complexity. Code complexity directly impacts maintainability of the code.

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colly Key Features

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colly Examples and Code Snippets

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Community Discussions

Trending Discussions on colly

What can the go-colly library do?

Getting attribute value with Go Colly

What is the default mode in GoColly, sync or async?

I cannot web-scrape forbes top billionares website with colly go

Pygame vertical collisions

how to scrape attribute in attibute with colly

Create an array of a certain type and reuse it

How can I write one after another JSON data

type 'List' is not a subtype of type 'Map' need to conver list of map as map

Append property from two arrays of objects

QUESTION

What can the go-colly library do?

Asked 2022-Apr-07 at 21:22

Can the go-colly library crawl all HTML tags and text content under a div tag? If so, how? I can get all texts under a div tag. Like this:

...

ANSWER

Answered 2022-Apr-07 at 21:22

If you looking for innerHTML it is accessible by DOM and using Html method (e.DOM.Html()).

Source https://stackoverflow.com/questions/71779764

QUESTION

Getting attribute value with Go Colly

Asked 2022-Mar-26 at 20:33

When working with c.OnHTML in "html", how can I get the value of the href attribute inside the #id-card-1 ID?

...

ANSWER

Answered 2022-Mar-26 at 20:33

The ChildAttr function can use for this purpose.

ChildAttr returns the stripped text content of the first matching element's attribute.

https://pkg.go.dev/github.com/gocolly/colly#HTMLElement.ChildAttr

Source https://stackoverflow.com/questions/71630862

QUESTION

What is the default mode in GoColly, sync or async?

Asked 2022-Jan-24 at 07:58

What is the default mode in which network requests are executed in GoColly? Since we have the Async method in the collector I would assume that the default mode is synchronous. However, I see no particular difference when I execute these 8 requests in the program other than I need to use Wait for async mode. It seems as if the method only controls how the program is executed (the other code) and the requests are always asynchronous.

...

ANSWER

Answered 2022-Jan-24 at 07:58

The default collection is synchronous.

The confusing bit is probably the collector option colly.Async() which ignores the actual param. In fact the implementation at the time of writing is:

Source https://stackoverflow.com/questions/70823151

QUESTION

I cannot web-scrape forbes top billionares website with colly go

Asked 2021-Nov-15 at 13:36

package main

import (
"encoding/csv"
"fmt"
"os"

"github.com/gocolly/colly"
)

 func checkError(err error){
 if err!=nil{
    panic(err)
}
}
func main(){
fName:="data.csv"
file,err:=os.Create(fName)
checkError(err)
defer file.Close()
writer:=csv.NewWriter(file)
defer writer.Flush()
c:=colly.NewCollector(colly.AllowedDomains("forbes.com","www.forbes.com"))
c.OnHTML(".scrolly-table tbody tr", func(e *colly.HTMLElement) {
        writer.Write([]string{
            e.ChildText(".rank .ng-binding"),
        })
    })  
    c.OnError(func(_ *colly.Response, err error) {
        fmt.Println("Something went wrong:", err)
    })
    c.OnRequest(func(r *colly.Request) {
        fmt.Println("Visiting", r.URL)
    })
    c.OnResponse(func(r *colly.Response) {
        fmt.Println("Visited", string(r.Body))
    })
    c.Visit("https://forbes.com/real-time-billionaires/")
     }

...

ANSWER

Answered 2021-Nov-01 at 05:23

Make sure what is available if you disable javascript in your browser (you can do it using the developer tools). Most scrapers will only get you the textual representation of the page, while the browser will also run javascript engine against it. If the data you are trying to scrape is populated with Javascript, there is a very good chance that is the reason you can't scrape it.

Source https://stackoverflow.com/questions/69792838

QUESTION

Pygame vertical collisions

Asked 2021-Nov-05 at 20:07

I have a code which make the player move in two dimensions, with no gravity (like Isaac or World Hardest Game). The problem are the collisions with the tiles (celle) in the map:

...

ANSWER

Answered 2021-Nov-05 at 20:07

The best way i know to handle 2d collision is to move the player on one axis, check for collision and then move the player on the other axis:

Source https://stackoverflow.com/questions/69810995

QUESTION

how to scrape attribute in attibute with colly

Asked 2021-Oct-21 at 13:39

I try to scrape productId of a product but i can not. please help

html code

...

ANSWER

Answered 2021-Oct-21 at 13:39

The attribute value is a raw value, and in this case, it's in JSON format, so you will need to parse the JSON in order to correctly get the data.

For example:

Source https://stackoverflow.com/questions/69660694

QUESTION

Create an array of a certain type and reuse it

Asked 2021-Aug-31 at 01:14

I'm having trouble creating the payload for my graphql resolver. How could I rewrite this to return a completed array?

I'm stuck inside of c.OnHTML("article", func(e *colly.HTMLElement) {} and can't return the data outside of it.

...

ANSWER

Answered 2021-Aug-29 at 04:57

If you need to get full list of articles, you need to append new article into articles slice inside of your c.OnHTML function instead creating new slice.

and return articles slice end of the News() Method.

Source https://stackoverflow.com/questions/68969462

QUESTION

How can I write one after another JSON data

Asked 2021-Jul-18 at 20:16

I am working on a website scraper. I can send only 1 JSON data to JSON file regularly. I want to write one after another JSON data, so I need to keep hundreds of data in a single JSON file. like this

...

ANSWER

Answered 2021-Jul-18 at 15:34

Here is a solution which appends new Info to the list and store in file. The solution will perform properly only for relatively small list. For large lists, the overhead of writing the entire file each time may be too high. In such case i propose to change the format to ndjson. It will allow to write only the current Info struct instead of the whole list. I've also added synchronization mechanism to avoid race conditions in case you send multiple HTTP requests at the same time.

I assumed that the identifier must be generated separately for each request, and it is not a problem if collision occur.

Source https://stackoverflow.com/questions/68429426

QUESTION

type 'List' is not a subtype of type 'Map' need to conver list of map as map

Asked 2021-Jul-10 at 11:50

the result I got as List

...

ANSWER

Answered 2021-Jul-10 at 11:50

i don't think this is map

{name: john, voted: [{5fhh54522b5: 8}, {2cg128gsc4541: 822}]}, {name: Donald, voted: [{8br55rj25ns3j: 822}, {jfej4v85552: 1}]}, {name: Abraham, voted: []}, {name: Colly, voted: []}

they are multiple maps, not single map.

you can use list.asMap() function to convert list of any to map,

HI, i tried in dart pad, i can see that it is not valid json, you have to convert it like this, after that it you will be able to parse the json string easily

voted :[ { id : '5fhh54522b5', count : '8'}, ]

Source https://stackoverflow.com/questions/68310537

QUESTION

Append property from two arrays of objects

Asked 2021-Jul-05 at 15:21

In JavaScript, I have two arrays - arr1, arr2

arr1 is an array of objects as shown below -

...

ANSWER

Answered 2021-Jul-05 at 14:56

You can use map and find in your case.

Source https://stackoverflow.com/questions/68258096