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Programming with Amazon, Google, and eBay

Programming with Amazon, Google, and eBay. Chunju Tseng (Lu) chunju@u.arizona.edu http://www.u.arizona.edu/~chunju/age.ppt. Outline. 9/13 (Tuesday) Web Services in a nutshell Overview of Amazon, Google, and eBay APIs Lab Session: Web Services Programming 9/15 (Thursday)

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Programming with Amazon, Google, and eBay

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  1. Programming with Amazon, Google, and eBay Chunju Tseng (Lu) chunju@u.arizona.edu http://www.u.arizona.edu/~chunju/age.ppt

  2. Outline 9/13 (Tuesday) • Web Services in a nutshell • Overview of Amazon, Google, and eBay APIs • Lab Session: Web Services Programming 9/15 (Thursday) • Back to World Wide Web 101 • Lab Session: Java Web Programming

  3. What is Web Services? • Web Services: • A new way of reuse/integrate third party softwre or legacy system • No matter where the software is, what platform it residents, or which language it was written in • Based on XML and Internet protocols (HTTP, SMTP…) • Benefits: • Ease of integration • Develop applications faster

  4. Web Services Architecture • Simple Object Access Protocol (SOAP) • Web Service Description Language (WSDL) • Universal Description, Discovery and Integration (UDDI)

  5. New Breeds of Web Services • Representational State Transfer (REST) • Use HTTP Get method to invoke remote services (not XML) • The response of remote service can be in XML or any textual format • Benefits: • Easy to develop • Easy to debug (with standard browser) • Leverage existing web application infrastructure • We will focus on REST services programming in the lab session • Really Simple Syndication (RSS) • Designed for news-oriented websites to “Push” content to readers • Excellent to monitor new content from websites

  6. Amazon Web Services (AWS) • Amazon E-Commerce Service • Search catalog, retrieve product information, images and customer reviews • Retrieve wish list, wedding registry… • Search seller and offer • Alexa Web Information Service • Retrieve information such as page rank, related sites given a target URL • Amazon Simple Queue Service • A distributed resource manager to store web services results

  7. Google Web APIs • Programmatically search web pages using Google • Get information about search result including URL, snippet, title and directory category • Spell-checking and suggestion

  8. eBay API • Buyers: • Get the current list of eBay categories • View information about items listed on eBay • Display eBay listings on other sites • Leave feedback about other users at the conclusion of a commerce transaction • Sellers: • Submit items for listing on eBay • Get high bidder information for items you are selling • Retrieve lists of items a particular user is currently selling through eBay • Retrieve lists of items a particular user has bid on

  9. Other Free Web Services • Google Maps API • http://www.google.com/apis/maps/ • Crime mapping: http://www.chicagocrime.org/ • Fine cheap gas: http://www.mywikimap.com/ • Reuters News • http://www.microsite.reuters.com/rss/topNews • Shopping Deals • http://techbargains.com/rss.xml • MSN Search Engine • http://beta.search.msn.com/results.aspx?q=FMD&format=rss • Yahoo Highest-rated News • http://rss.news.yahoo.com/rss/highestrated • Yahoo Financial News Search • http://news.search.yahoo.com/news/rss?p=YHOO • World Weather RSS Feed • http://www.rssweather.com/ • XMethods.net • http://xmethods.com/

  10. Lab Session:Amazon, Google, EBay APIs • Required Software: • NetBeans IDE • Amazon API (http://www.amazon.com/gp/aws/landing.html) • Google API (http://www.google.com/apis/) • Registered with Amazon and Google • Topics: • Setup NetBeans • Execute Amazon Samples • REST with Browser • REST with Jakarta HttpClient • Programming Google API

  11. Setup NetBeans with Amazon • Assume NetBeans 4.1 is installed • http://www.netbeans.org/ • Register Amazon subscription ID • http://www.amazon.com/gp/aws/landing.html • Download Amazon Java sample • Create NetBeans project • Install necessary libraries • Execute Amazon code sample • Main.java

  12. Retrieve Customer Information • CustomerContentSearch • Give name to retrieve customer ID • CustomerContentLookup • Give customer ID • Request WishList information • ResponseGroup=CustomerInfo, CustomerLists • Receive WishList ID • Use Amazon API Reference!!

  13. Retrieve Customer WishList and Response Manipulation • ListLookup • Give list ID and type to retrieve WishList content with a simple browser (REST) • ResponseGroup=ListItems,ListInfo • Result shows in XML format • ListLookup with xml-to-text XSLT • Give custom XSL to manipulate response • Style=http://www.u.arizona.edu/~chunju/text.xsl&ContentType=text/plain • ListLookup with xml-to-html XSLT • ResponseGroup=ListItems,ListInfo,Images,SalesRank,ItemAttributes • Style=http://www.u.arizona.edu/~chunju/html.xsl&ContentType=text/html

  14. Access Amazon REST Service with Jakarta HttpClient • Download & install necessary libraries • Jakarta HttpClient, Codec • JUnit • Write first Java program in NetBeans • Use previous REST invocation strings • Print Amazon response in console • Resources: • http://jakarta.apache.org/commons/index.html • http://www.junit.org/ • http://www.u.arizona.edu/~chunju/HttpClientMain.java

  15. Programming Google API • Download Google Web API • http://www.google.com/apis/ • Install Google library • Execute Google API demo • Write Java codes to search Google • Search Google • Access cached pages • Keyword suggestion • Source:http://www.u.arizona.edu/~chunju/GoogleMain.java

  16. Other Resources • Java Web Services Developer Pack • http://java.sun.com/webservices/downloads/webservicespack.html • Consuming Web Services with NetBeans • http://www.javapassion.com/planning/handsonbyol/netbeanswebservices/ • XSLT Tutorial • http://www.w3schools.com/xsl/ • Lab Session Step-by-step Snapshots • http://www.u.arizona.edu/~chunju/mis531a/

  17. See you next time! Questions are welcome

  18. Flash/ Applets JavaScript VBScript HTML/ CSS ASP, JSP, PHP… Plug-ins Script Engine Renderer Application Server Browser Web Server HTTP request response (HTML) World Wide Web 101

  19. Static Web Pages • Browser • Internet Explorer, Mozilla Firefox, Netscape • Web Server • Apache, IIS • HTML • Hypertext Markup Language • HTTP • Hypertext Transfer Protocol

  20. Dynamic Web Pages • Application Servers • Tomcat, IIS, mod_php • Server side programming languages • ASP, JSP, PHP, cgi, ….. ROR • Client side programming languages • JavaScript, VBScript • Dynamic HTML, XHTML, CSS • Other dynamic contents • Java Applets, ActiveX, Flash

  21. Rich Interactivity Web - AJAX • AJAX: Asynchronous JavaScript + XML • AJAX incorporates: • standards-based presentation using XHTML and CSS; • dynamic display and interaction using the Document Object Model; • data interchange and manipulation using XML and XSLT; • asynchronous data retrieval using XMLHttpRequest; • and JavaScript binding everything together. • Examples: • http://www.gmail.com • http://www.kiko.com • More info: http://www.adaptivepath.com/publications/essays/archives/000385.php

  22. AJAX Application Model

  23. Lab Session:Java Web Programming • Required Software: • JDK 1.4 or later • Apache Tomcat • NetBeans IDE (optional) • Topics: • Install JDK • Install Tomcat • First Java Server Page • Servlet with NetBeans IDE

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