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478 CHAPTER 20 WEB SERVICES RSS Syntax If you re not familiar with the general syntax of an RSS feed, Listing 20-1 offers an example, which will be used as input for the scripts that follow. Although a discussion of RSS syntax specifics is beyond the scope of this book, you ll nonetheless find the structure and tags to be quite intuitive (after all, that s why they call it Real Simple Syndication ). Listing 20-1. A Sample RSS Feed (blog.xml)
http://blogs.apress.com/
http://blogs.apress.com/?p=639#more-639 The annual Ohio LinuxFest 2005 conference is rapidly approaching, taking place at the Columbus Convention Center on October 1, 2005…
http://blogs.apress.com/?p=634#more-634 In the first installment of a three-part series for Developer.com, you learned how to take advantage of Google's amazing mapping API…
http://blogs.apress.com/?p=626#more-626 The Web's greatest advantage, accessibility, has also proved to be its greatest detriment in terms of security… Note that this example is somewhat stripped down, as there are numerous other elements found in an RSS 2.0 file such as the update period, language, and creator. However, for the purposes of the examples found in this chapter, it makes sense to remove those components that have little bearing on instruction. To view an example of a complete feed, see http:// blogs.apress.com/wp-rss.php. Now that you re a bit more familiar with the purpose and advantages of RSS, you ll next learn how to use PHP to incorporate RSS into your own development strategy. Although there are numerous RSS tools written for the PHP language, one in particular offers an amazingly effective solution for retrieving, parsing, and displaying feeds: MagpieRSS.
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CHAPTER 20 WEB SERVICES Figure 20-1. The SharpReader interface, created by Luke Hutteman WHO S PUBLISHING RSS FEEDS? Believe it or not, RSS has actually officially been around since early 1999, and in previous incarnations since 1996. However, like many emerging technologies, it remained a niche tool of the techie community, at least until recently. The emergence and growing popularity of news aggregation sites and tools has prompted an explosion in terms of the creation and publication of RSS feeds around the Web. These days, you can find RSS feeds just about everywhere, including within these prominent organizations: Yahoo! News: http://news.yahoo.com/rss/ Christian Science Monitor: http://www.csmonitor.com/rss/ CNET News.com: http://www.news.com/ The BBC: http://www.bbc.co.uk/syndication/ Wired.com: http://www.wired.com/news/rss/ Given the adoption of RSS in such circles, it isn t really a surprise that we re hearing so much about this great technology these days.
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ASP.NET: Visit Microsoft s Web site for the latest information on ASP.NET. ASP.NET Developer Center: The Official Microsoft Developer Center for ASP.NET Visual Web Developer 2005 Express Edition Home Page: This page on the Microsoft Web site provides additional information and links for Visual Web Developer Express. ASP.NET Forums: Read and place postings on the many ASP.NET forums. SQL Server Query Basics: Learn to use the powerful T-SQL language and see how easy and flexible it is for retrieving information stored in SQL Server. This article introduces you to T-SQL and its robust query syntax that makes it easy for you to use SQL Server Express for your data-driven applications.
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Security: Learn the essentials of ASP.NET security with an emphasis on forms authentication, the membership and role management services, and login controls. Master Pages and Site Navigation: Get an introduction to master pages, which are templates that provide content to other pages, and to the data-driven site navigation tools featured in ASP.NET 2.0. Data Access: New controls in ASP.NET 2.0 enable developers to build sophisticated, data-driven Web pages with little or no code. This module introduces developers to data-driven content, ASP.NET-style. Application Infrastructure: Pages alone do not a Web site make. This module introduces other essential elements of ASP.NET applications, including Web.config, Global.asax, components, and resources. Starter Kits: The ASP.NET 2.0 Starter Kits for Visual Web Developer are fully functional sample applications to help you learn ASP.NET 2.0. Each sample is complete and well-documented so that you can use the code to kick start your Web projects today. Club Site Starter Kit (link): This starter kit provides a starting point for creating a Web site for your club or organization. The kit includes news posting, calendaring, member directory, and photo album systems. Time Tracker Starter Kit (link): This is a business Web application for keeping track of hours spent on a project, with the ability to handle multiple resources as well as multiple projects. Additional Resources: Here are additional resources on the Web. Most of these links will be updated in the future, so you may want to occasionally check them for updated information and resources. Visual Web Developer 2005 Express Edition Guided Tour: Learn about the key new features available in Visual Web Developer 2005 Express that will make Web development easier and more productive than ever before. ASP.NET 2.0 QuickStart Tutorial: The ASP.NET QuickStart is a series of ASP.NET samples and supporting commentary designed to quickly acquaint you with the syntax, architecture, and power of the ASP.NET Web programming framework. The QuickStart samples are designed to be short, easy-to-understand illustrations of ASP.NET features. By the time you finish reading this tutorial, you will be familiar with the broad range of the new features in ASP.NET 2.0, as well as the features that were supported in earlier versions. What s on the CD-ROM? 339
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Additional Resources: Here are additional resources on the Web. Most of these links will be updated in the future, so you may want to occasionally check them for updated information and resources. Visual Basic Express Edition Home Page: This page on the Microsoft Web site provides additional information and links for Visual Basic Express. Visual Basic Developer Center: Visit the Microsoft Visual Basic Developer Center. Here you will find the most recent information on Visual Basic. Visual Basic Forums: Read and place postings on the many ASP.NET forums. SQL Server Query Basics: Learn to use the powerful T-SQL language and see how easy and flexible it is for retrieving information stored in SQL Server. This article introduces you to T-SQL and its robust query syntax that makes it easy for you to use SQL Server Express for your data-driven applications. Visual Web Developer 2005 Express Videos: Learn Visual Web Developer Series This video series is designed specifically for individuals who are interested in learning the basics of how to create dynamic Web applications using ASP.NET 2.0 and Visual Web Developer 2005 Express Edition in either Visual Basic or C#. Includes all 14 lessons with 14 videos and 14 downloads for Visual Basic Includes all 14 lessons with 14 videos and 14 downloads for C# Videos: Videos by Jeff Prosise of Wintellect (Links to MS Web Site) This series of video presentations by Jeff Prosise of Wintellect introduces you to many of the new features of ASP.NET 2.0, such as: Web Forms: Web forms are the atoms from which ASP.NET Web pages are built. This module introduces the Web forms programming model and acquaints developers with some of the Web controls featured in ASP.NET. State Management: ASP.NET 2.0 provides a variety of mechanisms for building stateful Web applications. This module introduces them all: view state, application cache, session state, profiles, and cookies. 338 Visual Web Developer 2005 Express Edition For Dummies
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What s on the CD-ROM? This book includes two CD-ROMs. The first disc contains Visual Web Developer 2005 Express Edition software. The second disc contains supplemental material for Visual Basic 2005 Express and Visual Web Developer 2005 Express. The full contents of this second disc are discussed in the sections that follow. Visual Basic 2005 Express Videos: Absolute Beginner s Guide to Visual Basic Express This video series is designed specifically for individuals who are interested in learning the basics of how to create applications using Visual Basic 2005 Express Edition. This includes over 8 hours of video-based instruction that walks from creating your first Hello World application to a fully functioning RSS Reader application. Learn how to write your first application today. For more information on software development with Visual Basic Express Edition, you may be interested in these Supplemental Readings. (They require Adobe Acrobat Reader.) Includes all 16 lessons with 17 videos and 12 downloads. Starter Kits: Starter Kits are enhanced project templates that can be shared with other members of the community. Here are some starter kits for Visual Basic. Card Game Starter Kit: This Starter Kit is a complete Black Jack card game. The starter kit contains an extensible framework for building card games and a Black Jack game application that is built on top of this framework. The project comes ready to compile and run, but it s easy to customize with only a little extra programming. The section Expanding the Card Game contains a list of some customizations you might make. You are also free to use the source code as the basis for your own card game projects, and share your work with others or upload it to the Internet. Amazon-Enabled Movie Collection Starter Kit (link): The Amazon- Enabled Movie Collection Starter Kit is a Windows Form application that uses Amazon.com s Web services to dynamically search for movie titles. This Starter Kit demonstrates technologies such as: calling XML Web services, databinding, application settings, local data storage using SQL Server 2005 Express Edition, and more.
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If you use the two-headed arrow box to copy all the pages from your local site to the remote computer in that case, you end up copying the local Web.config file too. To play it safe, select only the files you do want to copy, then click the right-pointing arrow button, as shown in Figure A-5, to copy just the modified pages without copying the modified Web.config file. In a nutshell, that s how uploading pages to a Web server works in Visual Web Developer Express. In the non-Express version of the product, you also have the option to publish the site. The main difference between the two processes is that when you publish, you must first create a set of executable files, and then copy those files to the server. Figure A-5: Copying just the selected files. 336 Visual Web Developer 2005 Express Edition For Dummies
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When you re connected, the left pane shows your local site s files; the right pane shows the remote site s files. Initially, the remote site is empty. At this point, you simply want to copy all the files from your local site to the remote site. You can do so by clicking the button with the two-headed arrow between the two panes. Then you wait. When all the files have been copied, the two columns will look the same, because the remote site contains all the same folders and files as the local site. To test the remote site, close Visual Web Developer. Then browse to the site s URL, just as if you were any user who wanted to visit the site. If there s a problem with the remote site, chances are it s something you have to fix at that end using a Control Panel or something similar on the remote site to do that final tweaking. But exactly what final tweaking is required is (you guessed it) information you can get only from your service provider. Given that your local site the one that lives on your PC is the best place to tweak, you may want to re-enable debugging and tracing in that site only. Now, because that change will be stored in the site s Web.config file, you must remember not to upload that file to the remote site. In the Copy Files text box, the discrepancy between the local-site and remote-site Web.config files will show up as a pair of question marks, as shown in Figure A-4. Don t presume that question marks mean You must upload this file right now. The question marks simply mean that the two files are different. But in this case, you may very well want the two Web.config files to be different because the sites are on two different computers, requiring two different configuration files. Any other changes you make to your site, however, should be uploaded to the remote site as needed. Those changes show up as a blue arrow. Figure A-4: The local and remote Web.config files don t match but that may be okay. Appendix: Publishing Your Site 335
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Remember, I m just showing you examples here, not specific instructions for your hosting provider. Only your hosting provider can give you specific instructions to configure your site for the services they provide. If your site will send e-mail automatically, you also need to configure SMTP e-mail settings, using the link by that same name shown in Figure A-1). Again, only your hosting provider can tell you exactly how to configure your SMTP settings. Copying the Site After you have the above ducks all in a row, you re ready to copy your site to the hosting provider s server. You start by opening your Web site in Visual Web Developer, of course. Exactly how you do that will vary from one hosting provider to the next. But here are the general steps using FTP to upload pages: 1. Choose Web Site . Copy Web Site from the menu bar. 2. Click the Connect button near the top of the page that opens. 3. In the left column, click FTP Site. 4. Type the FTP URL exactly as provided by your ISP into the Server box. 5. Deselect the Passive Mode and Anonymous Login check boxes. 6. Type your user name and password into the appropriate boxes, as shown in Figure A-3, and click Open. Figure A-3: Turn off debugging and tracing. 334 Visual Web Developer 2005 Express Edition For Dummies
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On a Web server, you generally don t want debugging and tracing enabled because those things eat up resources. The drain is trivial and unimportant on your local PC, but on a Web server where the system is likely to be much busier the effect of that resource consumption is magnified greatly. So before you upload, click the Configure debugging and tracing link. Then clear the Enable Debugging and Capture Tracing Information check boxes, as shown in Figure A-2. Figure A-2: Turning off debugging and tracing. Figure A-1: Application Configuration in the Web Site Administration Tool. Appendix: Publishing Your Site 333
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