Software Engineering for Internet Applications - Student Community

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5.11 Exercise 3Build the basic user registration and login pages. Use HTTP cookiesto make the rest of the semester's work easier.Questions: Can someone sniffing packets learn your user'spassword? Gain access to the site under your user's credentials?What happens to a user who forgets his or her password?5.12 Exercise 4Build the site administrator's pages for working with users. The siteadministrator should be able to (1) see recently registered users, (2)look up a particular user, (3) exclude a user from the site, and (4) seecurrent and historical statistics on user registration.Questions: How can the administrator control who is permitted toregister and use the site? What email notification options does thesite administrator have that relate to user registration?5.13 Exercise 5Look at your tables again for referential integrity constraints andquery performance. How long will it take to look up a user by emailaddress? What if this email address is capitalized differently fromwhat you've stored in the database? Is it possible to have two userswith the same email address? [Note that by Internet standards alowercase email address or hostname is the same as an uppercaseemail address or hostname.]Many Web applications contain content that can only be viewed bymembers of a specific user group. With your data model, how manytable rows will the RDBMS have to examine to answer the question"Is User #541 a member of Group #90"? If the answer is "every rowin a big table", i.e., a sequential scan, what kind of index could youadd to speed up the query?5.14 More• SQL for Web Nerds, data modeling chapter, athttp://philip.greenspun.com/sql/data-modeling• for a discussion of indices, see SQL for Web Nerds, tuningchapter, at http://philip.greenspun.com/sql/tuningA good rule of thumb is that every table you add to your data modelimplies roughly 5 user-accessible URLs and 5 administrative URL.So far we're up to 4 user pages and if you were to launch this featureyou'd need to build some admin pages.14.4 Exercise 3: Encouraging Searching BeforeAsking and the Google APIsA major challenge threatening online communities is the clutter ofrecurring questions and the effort of pointing those who ask them tothe FAQ or the search engine. An existing content item on yourserver or elsewhere on the Internet might not provide a completeanswer to Joe Newbie's question but reading it would perhaps causehim to focus his query in a different direction.In this exercise you'll create an alternative post confirmation processthat will entail writing two new Web scripts, the search capabilitiesthat you developed in the Search chapter(http://philip.greenspun.com/seia/search), and the the Google WebAPIs service (http://www.google.com/apis/). The goal is to put someinternal and external links in front of Joe Newbie and encourage himto look at them before finalizing his question for presentation to theentire community.Your new post confirmation process should be invoked only forquestions that start a discussion thread, not for answers to aquestion. Our experience with online communities is that it is moreimportant to moderate the questions that determine what will bediscussed rather than individual answers.If your current post confirmation page is at /forum/confirm wesuggest adding a -query suffix for your new script, e.g.,/forum/confirm-query. This page should have the followingform:1. at the top, the user's question as it will appear in the forum,with "Confirm" and "Edit" buttons underneath2. the top 5-10 matches among the site's articles and existingdiscussion forum postings that match the user's question ina full-text search (feed the one-line summary or perhaps theentire question to your local search engine)3. the top 5-10 matches in the Google database for the user'squestion, again using the user's question as the Googlequery string92257
• description• URL for a photo of the cover and the width and height inpixels of that image if you can get them easily• when this book was recommended• who recommended the book• a comment by the person who recommended the book as towhy it is particularly relevant to this communityYou may wish to start your exploration of the Amazon SOAP API bylocating the Web Services Description Language (WSDL) file for theservice. The WSDL file is a formal description of the callablefunctions, argument names and types, and return value type. MostInternet application development environments provide a SOAPtoolset that transforms the WSDL file into a set of proxy classes orfunction libraries that can be called as if the service wereimplemented in the local runtime. In Microsoft Visual Studio .NET,this operation is referred to as "Adding A Web Reference". If you'renot a Microsoft Achiever you might find the "SOAP Implementations"links at the end of the chapter useful.• Normal forms: Chapter 4 of Access Database Design &Programming, available online athttp://www.oreilly.com/catalog/accessdata2/chapter/ch04.html and Chapter 1 of Transact-SQL Programming, availableonline athttp://www.oreilly.com/catalog/wintrnssql/chapter/ch01.html• the Oracle Data Dictionary:http://eveandersson.com/writing/data-model-reverseengineering5.15 Time and MotionThe data modeling, page flow sketching, and questions about queryperformance will probably be done by the team as a group andrequire approximately three hours. Implementing the page scriptscould be divided up among team members but in any case should bedoable in 10 programmer-hours.14.3 Exercise 2: Community Reading List, Buildingthe PagesWe suggest creating a subdirectory at /reading-list/ for thepage scripts that will make up your new module. We suggestimplementing the following URLs:• an index page, listing the books on the reading list by title,author, and with cover art displayed, and perhaps the first100 words of the description• a /reading-list/one-book page, that will show the fulldescription, who recommended the book and why• a /reading-list/search page, the target of a text entrybox on the index page, that returns a list of books from theAmazon API that match a query string; books that arealready in the reading list should be displayed but greyedoutand somehow marked as already on the list (and thereshouldn't be a button to add them again!). Books that aren'ton the list should be hyperlinks to an "add-book" URL (youcan make the title of the book be the hyperlink anchor;remember always to let the information be the interface).• a /reading-list/add-book page, which solicits acomment from the suggesting user as to why this particularbook is good for other community members25693
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SoftwareEngineering forInternetAppl
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end-users. We use every opportunity
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• availability of magnet content
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• we want to see if a student is
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you supply English-language queries
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What to do during lecturesWe try to
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The one-term cram courseWhen teachi
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332• spend a term learning how to
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Once we've taught students how to b
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has permission to perform each task
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UDDIUnixcustomer's credit card. If
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thousands of concurrent users. This
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OraclePerlnamed XYZ" without the pr
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LDAPLinuxbits per color, a vastly s
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when there is an educational dimens
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system. The authors of the core pro
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Sign-OffsTry to schedule comprehens
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scheduling goals that both you and
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such as ticket bookings would colla
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give their site a unique look and f
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It isn't challenging to throw hardw
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Chapter 11Scaling GracefullyLet's l
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10.15 Beyond VoiceXML: Conversation
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Consider that if you're authenticat
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In this example, we:194• ask the
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As in any XML document, every openi
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(http://www.voicegenie.com). These
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Chapter 10Voice (VoiceXML)questions
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9.15 MoreStandards information:•
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9.14 The FutureIn most countries th
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9.10 Exercise 7: Build a Pulse Page
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9.6 Keypad HyperlinksLet's look at
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text/xml,application/xml,applicatio
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Protocol (IP) routing, a standard H
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