Yahoo Web Scrapes: What are the limits?

Posted by bvandrunen on Stack Overflow See other posts from Stack Overflow or by bvandrunen
Published on 2010-04-20T23:27:03Z Indexed on 2010/04/20 23:33 UTC
Read the original article Hit count: 318

Filed under:

ASP.NET

|

screen-scraping

|

webscraping

|

visual-studio-2008

We are using a web scraper and have it set up to have a sleep function which has a random function set up (so that it isn't the same time between each scrape) but we are still getting blocked from Yahoo after 20-30 requests.

Does any one know if there is a limit (i.e: 20 requests per minutes, 200 an hour) Right now our average between each request is around 3-6 seconds. Thanks for any help

© Stack Overflow or respective owner

Related posts about ASP.NET

Migrating ASP.NET MVC 1.0 applications to ASP.NET MVC 2 RTM

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
Note: ASP.NET MVC 2 RTM isn’t yet released! But this tool will help you get your ASP.NET MVC 1.0 applications ready for when it is! I have updated the MVC App Converter to convert projects from ASP.NET MVC 1.0 to ASP.NET MVC 2 RTM. This should be last the last major change to the MVC App Converter… >>> More
April 14th Links: ASP.NET, ASP.NET MVC, ASP.NET Web API and Visual Studio

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
Here is the latest in my link-listing blog series: ASP.NET Easily overlooked features in VS 11 Express for Web: Good post by Scott Hanselman that highlights a bunch of easily overlooked improvements that are coming to VS 11 (and specifically the free express editions) for web development: unit… >>> More
Use ASP.NET 4 Browser Definitions with ASP.NET 3.5

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
We updated the browser definitions files included with ASP.NET 4 to include information on recent browsers and devices such as Google Chrome and the iPhone. You can use these browser definition files with earlier versions of ASP.NET such as ASP.NET 3 Read More......(read more) >>> More
ASP.NET webforms + ASP.NET Ajax versus ASP.NET MVC and Ajax framework freedom

as seen on Stack Overflow - Search for 'Stack Overflow'
If given the choice, which path would you take? ASP.NET Webforms + ASP.NET AJAX or ASP.NET MVC + JavaScript Framework of your Choice Are there any limitations that ASP.NET Webforms / ASP.NET AJAX has vis-a-vis MVC? >>> More
ASP.NET MVC 2 Released

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
I’m happy to announce that the final release of ASP.NET MVC 2 is now available for VS 2008/Visual Web Developer 2008 Express with ASP.NET 3.5. You can download and install it from the following locations: Download ASP.NET MVC 2 using the Microsoft Web Platform Installer Download… >>> More

Related posts about screen-scraping

PHP Screen Scraping Class

as seen on Bradino - Search for 'Bradino'
After some positive feedback I have decided to continue to develop the PHP Screen Scraping class. This post will server as the permanent home for the class. Download PHP Screen Scraping Class Updates 20009-07-30 Added setHeader() function >>> More
Screen scraping over SSL with .NET

as seen on Stack Overflow - Search for 'Stack Overflow'
What solutions exist for screen scraping a site over SSL for use with .NET? My use case is that I need to login to a partner website (https), navigate through a dynamic hierarchy, and download a zipped file of reports. I certainly could use other screen scrapers if there are no good viable options… >>> More
looking for alternative to Webzinc .NET , screen scraping, web automation library for .net

as seen on Stack Overflow - Search for 'Stack Overflow'
i came across this .net library http://www.webzinc.com/online/faq.aspx however, i was wondering if there was a free alternative out there ? >>> More
Screen-scraping of a secure page of any site on https:// with asp.net in C#

as seen on Stack Overflow - Search for 'Stack Overflow'
I've done site scraping of secure page of any site on http:// but when I am trying to scrap any site on https:// then i always scrape the login page not secure page. Please advice what should i do for scraping a secure page of any site on https://. >>> More
How different is mashup from screenscraping and consuming webservices

as seen on Stack Overflow - Search for 'Stack Overflow'
From what I understand, Mashup is aggregating data from separate sources and providing a single view. How different is mashup when compared to screenscraping or using webservices to get data from external sources? >>> More