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Professional Development with Web APIs

Professional Development with Web APIs. Presented To: Indy .NET Developer’s Association By: Denise Gosnell denise@denisegosnell.com July 14, 2005. Based On Topics In My New Book:. Professional Development with Web APIs Google, eBay, PayPal, Amazon.com, MapPoint, UPS, FedEx (April 2005)

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Professional Development with Web APIs

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  1. Professional Development with Web APIs Presented To: Indy .NET Developer’s Association By: Denise Gosnell denise@denisegosnell.com July 14, 2005

  2. Based On Topics In My New Book: • Professional Development with Web APIs • Google, eBay, PayPal, Amazon.com, MapPoint, UPS, FedEx (April 2005) • This Presentation Is Available For Download from www.denisegosnell.com/news.html • The Source Code for the book is available for download from www.wrox.com.

  3. Outline of Topics • What Is A Web API? • Google API • MapPoint API • Amazon.Com APIs • eBay API • PayPal API • Other APIs • Calling From Mobile Devices and Office • Creating Your Own API

  4. What Is a Web API? (Chapter 1) • Series or collection of web services • Sometimes used interchangeably with “web services” • Examples: Google API, Amazon.Com APIs

  5. How Do You Call a Web API? • XML web services can be invoked in one of three ways: • Using REST (HTTP-GET) • URL includes parameters • Example: http://webservices.amazon.com/onca/xml?Service=AWSECommerceService&SubscriptionId=YOURIDGOESHERE&Operation=ItemSearch&SearchIndex=Books&Keywords=Denise%20Gosnell • Using HTTP-POST • You post an XML document • XML document returned • Using SOAP • More complex, allows structured and type information

  6. The Google API (Chapter 2) • Available Using SOAP with HTTP • Limited to 1000 Calls Per Day • Obtain a Developer Key and Developer’s Kit From: • www.google.com/apis/ • Query Syntax: • doGoogleSearch (Key, SearchString, Start, MaxResults, Filter, Restrict, SafeSearch, lr, ie, oe) • Returns only 10 results at a time – have to change the start index to specify which ones to retrieve • doGetCachedPage (Key, URL) • doSpellingSuggestion (Key, Phrase)

  7. The MapPoint API (Chapter 3) • Can Be Called Using SOAP with HTTP • Examples of Supported Features: • Addresses • Reverse Geocoding • Finding Nearby Places • Custom Locations • Map Rendering • Points of Interest • Evaluation Account / Developer Account: http://www.microsoft.com/mappoint/webservice/default.mspx

  8. The Amazon.Com APIs (Chapter 4) • There Are Currently 3 Amazon.Com APIs • Amazon E-Commerce Service (ECS) • Alexa Web Information Service (AWIS) – programmatic access to www.alexa.com web crawl data • Simple Queue Service • All 3 Can Be Called Using SOAP or HTTP-GET(REST) • Info About These 3 Can Be Found At: http://www.amazon.com/gp/browse.html/102-3193582-7147314?%5Fencoding=UTF8&node=3435361 • Sign Up For Subscription ID at: http://www.amazon.com/gp/aws/registration/registration-form.html • Mention www.a9.com which uses one or more of Amazon.com APIs above

  9. Amazon.Com Demo • Create a New VB.NET WinForms Project • Add a reference to the Amazon.com API (Project | Add Web Reference): http://webservices.amazon.com/AWSECommerceService/AWSECommerceService.wsdl • Then, add the following code to your VB.NET WinForms project: Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim AmazonProductData As New _ TestAmazonWebService.Amazon.AWSECommerceService Dim AmazonSearch As New TestAmazonWebService.Amazon.ItemSearch Dim AmazonResponse As New _ TestAmazonWebService.Amazon.ItemSearchResponse Dim AmazonRequest(1) As _ TestAmazonWebService.Amazon.ItemSearchRequest 'Developer/Subscription Code AmazonSearch.SubscriptionId = "YOUR ID GOES HERE" 'We are only making one request, not batching multiple requests 'Thus element 0 of the array is all we need to assign and work with AmazonRequest(0) = New _ TestAmazonWebService.amazon.ItemSearchRequest AmazonRequest(0).SearchIndex = "Books" AmazonRequest(0).Keywords = “Denise Gosnell"

  10. Amazon.Com Demo (continued) 'assign the search object to the request object with the assigned parameters AmazonSearch.Request = AmazonRequest 'run the search and populate the response AmazonResponse = AmazonProductData.ItemSearch(AmazonSearch) Dim item As New TestAmazonWebService.Amazon.Item Dim strOutput As String strOutput = "Search results for keyword(s): " & AmazonRequest(0).Keywords & " in " & AmazonRequest(0).SearchIndex & ":" & vbCrLf & vbCrLf 'loop through the results For Each item In AmazonResponse.Items(0).Item strOutput = strOutput & item.ItemAttributes.Title & vbCrLf & vbCrLf Next 'display the results in a message box MsgBox(strOutput) End Sub

  11. The eBay API (Chapter 5) • eBay API can be called using HTTP-POST or SOAP • Sandbox (Test) and Live Environments • Supports most popular features: • Retrieve Auction Listings • Retrieve Customer Reviews • Retrieve Status of Auction • Add New Auction Listing • Retrieve Winning Details • Join Developer Program and Obtain Account: http://developer.ebay.com

  12. The PayPal API (Chapter 6) • PayPal API can be called using SOAP • Sandbox (Test) and Live Environments • Supports several features: • GetTransactionDetails • TransactionSearch • RefundTransaction • MassPay • Join Developer Program and Obtain Account: http://developer.paypal.com

  13. Demo – Combining APIs (from Chapter 11 Case Study) • Uses Google To Retrieve Top 5 web Sites That Mention Your Customer • Uses MapPoint To Retrieve Map And/Or Driving Directions To Customer Location

  14. Other APIs (Chapter 7) • InterFax Fax API • http://www.interfax.net/en/dev/index.html • UPS API • http://www.ec.ups.com/ecommerce/gettools/prodcompanies.html • FedEx API • http://www.fedex.com/us/solutions/wis/index.html (some require DLLs) • Bloglines API • http://www.bloglines.com/services/

  15. Finding More Web APIs • UDDI Directory • http://uddi.microsoft.com • BindingPoint Web Site • http://www.bindingpoint.com • Various Other Locations On Internet

  16. Calling From Mobile Devices (Chapter 8) • Use .NET Compact Framework In Visual Studio.NET To Target Pocket PCs and SmartPhones • Just Select Project Type In VS.Net • http://www.microsoft.com/windowsmobile • eMbedded Visual Tools • Use To Create Separate From VS.Net • Web Services For Palm • http://pluggedin.palmone.com/regac/pluggedin/WebServices.jsp

  17. Calling From Microsoft Office (Chapter 9) There Are At Least 3 Ways To Call Web API From Microsoft Office Programs: • VBA • Example in Excel using VBA and HTTP/GET (REST) • VBA using SOAP • requires Web Services Toolkit (available for free download from Microsoft) • Using .NET • requires Visual Studio Tools for Microsoft Office System – must purchase

  18. Creating Your Own APIs (Chapter 10) • Create New ASP.NET Web Service Project from VS.NET • Add Code • Test The Web Service Using Built-In Testing Utility In Web Browser • Call Web Service From Another Program Using Protocols You Enabled For Service • Can Also Convert Existing .NET App To Web Service By Wrapping With WebMethod Attribute

  19. Questions?

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