Rating: 
Summary: Great Book
Review: Are you ready to be the next Google? It is widely known that Google pulled out in front of (and largely obsoleted) major search engine players like Altavista and Yahoo largely because of Google's highly accurate search results -- you find what you search for. They are so confident in their search engine spiders they even have a "I'm feeling lucky" button to transport you to the first search result found -- it's arrogance, but well deserved arrogance. In a sentence, Google works.Enter Kevin Hemenway and Tara Calishain's latest O'Reilly book: Spidering Hacks. Continuing in the Oreilly "Hacks" tradition, this comprehensive guidebook provides a hundred clear, useful tools for designing and implementing the next generation -- or maybe just your own customized -- spider (or bot, if you prefer.) So why build your own spider? Well, if you have a large website, your spider could check link integrity, HTML standards and check meta-tags. If you are researching a topic and Google is not returning what you want, creating your own spider might be just what you need. This handy book (with examples in Perl) will show you how to: * Create a site-friendly bot that wont get you banned by webmasters (Hack #16 --Respecting your Scrapee's Bandwidth, and Hack # 17 -- Respecting robots.txt) * Interested in graphics, audio and video? Hacks #33 through #42 step you through collecting media files. Specific examples including scraping films from www.ifilm.com (Hack #24), gathering movies from the Library of Congress (Hack #35) and archiving images from Webshots. You'll have your own personalized library in no time. * Weblog-Free Google Results -- Weblogs (aka Blogs) are amazingly popular these days. With Google's pagerank algorithm, that means they get heavy emphasis in your search results. Hack #50 skims down the search results by eliminating those annoying Blogs. In addition, you'll find multiple hacks covering Amazon.com and RSS Feeds. The book includes much information regarding spider automation (e.g. Cron jobbing your spiders.) You'll find content filtering and and even a hack using PHP code(Hack #84.) This book is extraordinarily helpful and is a great resource for any PERL hacker. I highly recommend it to any computer hobbyist interesting in data mining and spidering and scraping. Well done, O'Reilly!
Rating: 
Summary: Rich samples, fit your specific needs if you're Perl lover
Review: If you are a Perl lover and looking for a book to help you extracting contents from this huge resourceful Internet, this book quite fits your needs. Overall is good, the author shows you how to setup your spidering tools -- Perl modules. Yes, Perl, if you're Java folks, too bad. He shows you how to use Perl modules on crawling web pages, logging on to systems, extracting specific contents, and massaging data to your needs, across 100 different scenarios. Most of them are practical, but they don't cover much of the details, you have to read the programs listed in the book, which is quite painful for non-Perl people like me. In addition, it doesn't provide much of resulting screen shots after running the sample codes. Most importantly, the author tries to avoid the copyright questions by delegating URL links for readers to reference. In general, it's still a good tool book in spidering field.
Rating:
Summary: fun to read
Review: Like other Oreilly hacking books, this one is easy to read and follow. Inside this book, you can find lots of aways automating perl scripts to things for you...The other related book is Perl&LWP...
Rating:
Summary: Good, but needs more variety of languages
Review: Nearly all of the examples were written using Perl, but the few pages written with PHP contained some very useful nuggets!
I especially liked the use of the explode() function to split a table-formatted html report into multiple PHP array elements for individual processing. Now, if only the authors had included examples written for ASP, Cold Fusion, etc. they could have appealed to a much wider audience!
Rating:
Summary: Lots of great ideas
Review: Once in a long while you get a book that inspires you with a lot of great small ideas. Spidering Hacks is just that type of book. The web has a wealth of structured and semi-structured that is just waiting to be mined with automated tools. This book not only teaches you how to get the data out of these sources, but gives you idea about where to look for information and what to do with it. This book demonstrates everything I like in a technical book. It not only describes how things are done. It also gives practical examples of how the technology can be useful in the real world, and presents them enthusiastically. It makes you want to go out and implement all of the ideas and to keep on going with some of your own. Nitpicks I have with the book are minor. The 'Hacks' format seems imposed, for example, hack #8 is about installing CPAN. I don't think that section should be left out, but I don't think it's a hack either. But hey, I don't care that much about the structure as long as it isn't an imposing flaw and the content within the structure is great, as it is with this book. Have to say, O'Reilly is on a roll with the Hacks series. They have all been fine books.
Rating:
Summary: A fresh idea
Review: Spidering hacks like other oreilly "hacks" books live up to the tradition. This book shows some of the internet guru tips and tricks. Although, overall the book is pretty straightfarword.. plz note that:
1. Even though the book has an introductary chapter(s) on perl, this is not really a perl newbie book. Make sure you alteast have the knowledge equivalent to "Learning Perl" before you touch this book.
2. For advance programmers, this book may not live up to the expection. Most of the book is about extracting information from websites (which one can easily do using a webbrowser BTW). However, the ideas and techniques are new for novices to intermediate.
3. The third problem is this book is that its more useful for North American audience than overseas. (However you can modify techniques.)
4. If you are not so much into programming, you might not like this book. Alternatively, you can just download the examples and run it yourself. Also, if you are not a power user OR dont have the time/skill/interest to spider the web you dont need this book. IT DOES NOT REVEAL SECRETS TO REVOLUTIONALIZE YOUR WEB EXPERIENCE OR LET YOU ACCESS ANY WEBSITE ILLEGALLY. Overall, ITS A good BOOK.
Rating:
Summary: Good book with a light start
Review: The 'Hacks' series from O'Reilly seems to be breeding as fast as virii in a Windows network - every time you turn around another one. While the writing and editing have remained high some such as 'eBay Hacks' have not really had great material. 'Spidering Hacks' is an improvement almost back to the quality I remember in the last contribution from Calishain, 'Google Hacks'. She and Kevin Hemenway have taken a fairly complex topic, spidering and scraping web sites and reduced it to manageable chunks in their hundred hacks. The writing has the same light, readable feel you can quickly grow to expect from O'Reilly. Certainly I have never found myself faulting their editing. There are some caveats. It seems that O'Reilly and Dornfest (the Editor of this book and the series) have fallen in love with having a hundred hacks and little in the way of an introduction. I think this may have been a better book if it was done as 90 'hacks' and had a much larger introduction as the first chapters hacks are all too light and more truly introductory material such as how a HTML page is built and how to properly register your spider. Given that only someone with a fair amount of web knowledge is going to consider spidering a website in the first place then this early material is way too slight. From Hack 9 on it quickly gets down to useful and informative chunks in each and no longer feels 'lightweight'. This may be a reflection on trying to extend the 'Hacks' series into places it has to be forced. While the format worked well for Google and Amazon I felt the entire topic of eBay too light for a topic in this series and perhaps spidering is too heavy or complex. If this book had been written in a more traditional format some of my complaints would disappear. All the examples are in Perl and the serious part of the book starts with examples using LWP::Simple to grab a page before going on to LWP::UserAgent and much more complex requests using authentication, custom headers and posting form data. It also covers using curl and wget. Then it gets down to the nitty gritty of scraping using HTML:Treebuilder and HTML:TokeParser. This is all further expanded through the next few hacks until starting at Hack 39 through to 89 there are a good series of examples (perhaps a few too many). Finally there are two chapters on maintaining your collection and 'Giving Back To The World' which tells how to make it easy to scrape your site and using RSS. O'Reilly have a page for the book with ten example hacks, index, Table of Contents and errata and you can also visit hacks.oreilly.com for the same ten hacks with the possibility of more being added. As a whole this volume seems a little thin. If you've been doing the maths then you've realised that only about thirty of the hundred hacks actually give any details on building and running a serious web spider. Sure, a number of the examples provide good information on how to perform various tasks and some of the last eleven hacks are good to know but in all the book feels like it lacks solid information throughout. A bit more information on various crawling and page parsing techniques would have been good. After that criticism I'm now surprising myself, I'm going to recommend this book. This isn't a large field and when you consider that most other books on writing spiders and crawlers are less than practical and more than expensive "Spidering Hacks" has many good points. It's written for the practical Perl programmer, it examines several methods and gives lots of examples and while not cheap it's certainly inexpensive. Given that I found it both useful and inspiring the complaints above may be a little like nitpicking. I should also say that I found this volume immensely useful in writing my own spider and scraper (it gets a list of new books from the web sites of several publishers.) I have to be honest and admit that there are three publishers, O'Reilly, Addison Wesley and Prentice Hall, from whom I expect a decent standard and criticise a little harder when they move from that norm. If this book had come from SAMS or Wrox I may well have not looked quite so hard for flaws and been a little more generous in my treatment of the ones I found. That said, I recommend this book to you if you want a practical introduction to building a web spider in Perl.
Rating:
Summary: Many examples of how to use spiders
Review: The book has a nice collection of case studies on how to gather data from disparate websites. You might consider this as showing a simple way for you to use Web Services. Spidering is the way that search engines gather their data. But you do not have to be Altavista or Google to use spiders. Nor do you have to be scanning a large fraction of the Web. The authors demistify spiders. If you can follow their examples, then you get concrete instances of usage that might help your particular application. Thoughtfully, the examples are mostly written in Perl, with a few in Java. These languages should be familiar to many. Though even if you don't know them, the logic of the code can still be useful. (That is, you can treat the code as pseudocode.) While spiders are probably best known as being used by search engines, they are really only the starting point for the latter. The much harder problems start when you have the data amassed by a spider. Now you have to efficiently find correlations between the various web pages. You should be aware that the book does not discuss these with any significant depth. Not surprising, because these are outside the scope of the book. The examples do show how to use the data found by spiders. But most of these are for web pages that sit in a given domain. So the pages are closely affiliated in content and structure.
Rating:
Summary: Example-filled and easy-to-follow
Review: The knowledgeable collaboration of Kevin Hemenway and Tara Calishain, Spidering Hacks: 100 Industrial-Strength Tips & Tools is an extensive, 402-page instructional guidebook and reference to Internet data retrieval through the use of spiders and scrapers. Including information on methodology, philosophies, and ethical considerations, as well as freely available modules, scripts, frameworks, and templates, information on how to build alternative interfaces to online databases, how to keep one's data current and share it in a user-friendly manner, and so much more, Spidering Hacks is an example-filled, easy-to-follow, highly recommended computer shelf resource.
Rating:
Summary: Example-filled and easy-to-follow
Review: The knowledgeable collaboration of Kevin Hemenway and Tara Calishain, Spidering Hacks: 100 Industrial-Strength Tips & Tools is an extensive, 402-page instructional guidebook and reference to Internet data retrieval through the use of spiders and scrapers. Including information on methodology, philosophies, and ethical considerations, as well as freely available modules, scripts, frameworks, and templates, information on how to build alternative interfaces to online databases, how to keep one's data current and share it in a user-friendly manner, and so much more, Spidering Hacks is an example-filled, easy-to-follow, highly recommended computer shelf resource.
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