473,618 Members | 3,044 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

web crawlers in java

1 New Member
can ne body give me an insight on java cralers and what it takes to code web crawlers???
Dec 13 '09 #1
1 1876
sukatoa
539 Contributor
know what data you are going to extract
make an algorithm of it
beware of Object manipulations( specially for a 24/7 System, it consumes huge memory and increasing if not handled properly )

on threads, be careful to handle passed-by-reference instances

Select what database system you are going to use for storage on your extracted data

good luck
Dec 13 '09 #2

Sign in to post your reply or Sign up for a free account.

Similar topics

3
2056
by: Araxes Tharsis | last post by:
Hi, This must be a very old and well studied question... I created a site using JSP, that permits the viewing of articles that are fully stored in a database. The url for the articles is something like: .../article.jsp?idi=6&ida=12 My question is, and this is the same for all dynamic content technologies (server-side scripting technologies): is there a way to permit for search engines and crawlers (Google, Yahoo...) to find and...
0
6800
by: Ravi Tallury | last post by:
Hi We are having issues with our application, certain portions of it stop responding while the rest of the application is fine. I am attaching the Java Core dump. If someone can let me know what the issue is. Thanks Ravi
5
1208
by: Ian Lane .enizin.net> | last post by:
Hello, Does anyone happen to have a Browsercaps update that properly sets the Crawler attribute? I am seeing that google and others are being recognized as browsers and not crawlers. Thank you.
0
1015
by: TomislaW | last post by:
I try to trace users on my web page In global.asax.cs on Application_BeginRequest I check if user has my cookie, if not I give him new cookie (integer identity number from database). When session ends I save in database some information (names of pages he visited). I don't want to save what crawlers (Google, yahoo.) do on my page, but don't know how to do that. I have one more problem with crawlers; some of them come to my site with...
0
1626
by: Stefano | last post by:
Hi all, I'm trying to create a browser definition file (.browser) that matches crawlers user agents. I don't want modify browser files in the Config system folder. I'd like to use App_Browsers directory, instead. I don't want to use Request.Browser.Crawler, because I'd like to be able to use device filtering for crawlers. So, for example, I would create a browser named "crawler", so I can use
3
2841
by: rooznamechi.h | last post by:
Hi, I use Url rewriting on my website and my website works normally , but I don't know why Google crawlers can not read my pages . For example look at address below : http://www.labkhandha.com/Article/265/default.aspx As you can see you can see the page but here is Google's Web crawl error for this page and all rewrite pages : 500 (Internal server error) The server encountered an error and can't fulfill the request
2
1158
by: disappearedng | last post by:
Hi Does anyone here have a good recommendation for an open source crawler that I could get my hands on? It doesn't have to be python based. I am interested in learning how crawling works. I think python based crawlers will ensure a high degree of flexibility but at the same time I am also torn between looking for open source crawlers in python vs C ++ because the latter is much more efficient(or so I heard. I will be crawling on very...
2
1665
by: disappearedng | last post by:
Hi Does anyone here have a good recommendation for an open source crawler that I could get my hands on? It doesn't have to be C++ based. I am interested in learning how crawling works. I think python based crawlers will ensure a high degree of flexibility but at the same time I am also torn between looking for open source crawlers in python vs C ++ because the latter is much more efficient(or so I heard. I will be crawling on very cheap...
4
1889
by: =?Utf-8?B?Wm9sdA==?= | last post by:
Hi, Would someone know where I could get a list of the supported crawlers for the HttpBrowserCapabilities? Is there a way to add new ones/modify the list? I have a web site for which I want to show a different content for search engine bots. I was planning on relying on HttpBrowserCapabilities.crawler, but what if the bot signature changes, or there is another one added, ... Thanks,
0
8212
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
8153
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
8595
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
8304
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
8455
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
7126
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
1
6101
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
4150
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
2
1459
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.