WebCrawler | Parser library

by meziantou C# Version: Current License: No License

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

kandi X-RAY | WebCrawler Summary

WebCrawler is a C# library typically used in Utilities, Parser, Nodejs applications. WebCrawler has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

WebCrawler allows to extract all accessible URLs from a website. It's built using .NET Core and .NET Standard 1.4, so you can host it anywhere (Windows, Linux, Mac). The crawler does not use regex to find links. Instead, Web pages are parsed using AngleSharp, a parser which is built upon the official W3C specification. This allows to parse pages as a browser and handle tricky tags such as base.

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Support

WebCrawler has a low active ecosystem.

It has 46 star(s) with 20 fork(s). There are 5 watchers for this library.

It had no major release in the last 6 months.

WebCrawler has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of WebCrawler is current.

Quality

WebCrawler has 0 bugs and 0 code smells.

Security

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

WebCrawler code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

WebCrawler does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

WebCrawler releases are not available. You will need to build from source code and install.

It has 148 lines of code, 0 functions and 41 files.

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

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WebCrawler Key Features

No Key Features are available at this moment for WebCrawler.

WebCrawler Examples and Code Snippets

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Community Discussions

Trending Discussions on WebCrawler

I have a problem with printing a list in Python

Getting text from textfield does not work

Aws Kendra and Spring boot

Java: HtmlUnit problem retrieving page title

What's the chronology for a race condition mentioned in [Concurrency in practice 7.2.5]

Can the google crawler detect an url state change made by my angular app?

Scrapy can't find items

psycopg2 - List index out of range for html (large string) field

Web crawler stops at first page

Python - webCrawler - driver.close incorrect syntax

QUESTION

I have a problem with printing a list in Python

Asked 2022-Mar-26 at 13:51

My code is:

...

ANSWER

Answered 2022-Mar-26 at 13:51

You must work with json-object. But not with string.

Source https://stackoverflow.com/questions/71628448

QUESTION

Getting text from textfield does not work

Asked 2022-Mar-04 at 08:07

Hello I found a Projekt on yt where you can search for a keyword and it will show all the websites it found on google. And right now I am trying to revive the keyword the user put in the textfield but it isn't working. It does not find the textfield (tf1) I made, but I don't know what I did wrong. Thanks in advance!

here's my code:

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ANSWER

Answered 2022-Mar-03 at 21:51

You have a reference issue.

tf1 is declared as a local variable within main, which makes it inaccessible to any other method/context. Add into the fact that main is static and you run into another problem area.

The simple solution would be to make tf1 a instance field. This would be further simplified if you grouped your UI logic into a class, for example...

Source https://stackoverflow.com/questions/71344112

QUESTION

Aws Kendra and Spring boot

Asked 2022-Mar-03 at 13:47

I want to integrate spring boot with the aws kendra query index.I want to leverage kendra as elastic search where i make api for search query and then get results for the same via that api.

Documentations dont clearly mention the connection procedure/steps. Not sure if thats possible or not.

P.s created index and dataSource as webcrawler. Now whats the step forward.

...

ANSWER

Answered 2022-Mar-02 at 16:20

You can use the AWS SDK for Java to make API calls to AWS services. You can find code examples in the link above.

Setting up your Kendra client will look something like this:

Source https://stackoverflow.com/questions/71306098

QUESTION

Java: HtmlUnit problem retrieving page title

Asked 2021-Dec-13 at 15:37

This is my first StackOverflow post so I'll try to describe my problem as good as I can.

I want to create a program to retrieve the reviews from TripAdvisor pages, I tried to do it via API but they didnt respond when I requested the API key, so my alternative is to do it with a WebCrawler.

To do so I have a Spring project and using HtmlUnit,a tool I never used, so in order to test it my first exercise is to retrieve the title of a webpage so I have the following code implemented:

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ANSWER

Answered 2021-Dec-01 at 06:24

    try (final WebClient webClient = new WebClient()) {
        webClient.getOptions().setThrowExceptionOnScriptError(false);

        final HtmlPage page = webClient.getPage("https://www.tripadvisor.com");
        // final HtmlPage page = webClient.getPage("https://www.youtube.com");

        System.out.println("****************");
        System.out.println(page.getTitleText());
        System.out.println("****************");
    }
    catch (Exception e){
        System.out.println("ERROR " + e);
    }

Source https://stackoverflow.com/questions/70123289

QUESTION

What's the chronology for a race condition mentioned in [Concurrency in practice 7.2.5]

Asked 2021-Nov-28 at 14:14

As Brian Goetz states: "TrackingExecutor has an unavoidable race condition that could make it yield false positives: tasks that are identified as cancelled but actually completed. This arises because the thread pool could be shut down between when the last instruction of the task executes and when the pool records the task as complete."

TrackingExecutor:

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ANSWER

Answered 2021-Nov-28 at 14:14

This is how I understand it. For example,TrackingExecutor is shutting down before CrawlTask exit, this task may be also recorded as a taskCancelledAtShutdown, because if (isShutdown() && Thread.currentThread().isInterrupted()) in TrackingExecutor#execute may be true , but in fact this task has completed.

Source https://stackoverflow.com/questions/70143414

QUESTION

Can the google crawler detect an url state change made by my angular app?

Asked 2021-Nov-17 at 21:10

Say I have an angular app that defines the following path.

...

ANSWER

Answered 2021-Nov-17 at 21:10

Google eventually treats JavaScript changes to the location when the page loads the same as a server side redirect. Using location changes to canonicalize your URLs will be fine for SEO.

The same caveats that apply to all JavaScript powered pages apply to this case as well:

Google seems to take longer to index pages and react to changes when it has to render them. JavaScript redirects may no be identified as redirects as quickly as server side redirects would be. It could take Google a few extra weeks or even a couple months longer.
Google won't see any changes that happen in response to user actions such as clicking or scrolling. Only changes that happen within a couple seconds of page load with no user interaction will be recognized.

Source https://stackoverflow.com/questions/70011387

QUESTION

Scrapy can't find items

Asked 2021-Nov-13 at 15:19

I am currently still learning Scrapy and trying to work with pipelines and ItemLoader.

However, I currently have the problem that the spider shows that Item.py does not exist. What exactly am I doing wrong and why am I not getting any data from the spider into my pipeline?

Running the Spider without importing the items works fine. The Pipeline is also activated in settings.py.

My Error Log is the following:

...

ANSWER

Answered 2021-Nov-12 at 12:35

Its work from me. Please follow this.

Source https://stackoverflow.com/questions/69935477

QUESTION

psycopg2 - List index out of range for html (large string) field

Asked 2021-Jul-28 at 14:45

I have a webcrawler that should save/insert the html page content to a PostgreSQL Database with some other meta data fields.

When inserting the html content field using mogrify I'll get the error message List index out of range. If I use a static dummy text for the html content e.g. "Hello World ö ü ä ß" (I am dealing with a german character set) the insert works fine.

This is my function:

...

ANSWER

Answered 2021-Jul-28 at 14:45

You shouldn't use tuples in cursor.execute(query, tuples).
When you use mogrify, you are basically generating the after-VALUES part of the sql query. So, there's no need to pass query parameters(tuples in your case) to cur.execute again.

Source https://stackoverflow.com/questions/68558311

QUESTION

Web crawler stops at first page

Asked 2021-Jul-15 at 05:39

I'm working on a webcrawler which should be working like this:

go to a website, crawl all links from the site
download all images (starting from the startpage)
if there are no images left on the current page, go to the next link found in step 1 and do step 2 and 3 until there are no links/images left.

It seems like the code below is somehow working, like when I try to crawl some sites, I get some images to download.

(even I dont understand the images I get, cause I cant find them on the website, it seems like the crawler does not start with the startpage of the website).

After a few images (~25-500), the crawler is done and stops, no errors, it just stops. I tried this with multiple websites and after a few images it just stops. I think the crawler somehow ignores step 3.

...

ANSWER

Answered 2021-Jul-15 at 05:39

(even I dont understand the images I get, cause I cant find them on the website, it seems like the crawler does not start with the startpage of the website).

Yes you are right. Your code will not download images from the start page because the only thing it is fetching from start page are all anchor tag elements and then calling processElement() for each anchor element found on the start page -

Source https://stackoverflow.com/questions/68358940

QUESTION

Python - webCrawler - driver.close incorrect syntax

Asked 2021-Apr-15 at 12:26

Novice programmer, currently making a WebCrawler and came up with driver.close()

^incorrect syntax as shown below,

However, I used driver above with no problem so I'm pretty perplexed at the moment

I appreciate all the help I can get

thanks in advance team

...

ANSWER

Answered 2021-Apr-15 at 10:53

In case you opened single window only you have nothing to driver.quit() from after performing driver.close()

Source https://stackoverflow.com/questions/67106875

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install WebCrawler

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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