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03-60-569 Project. Global Book retailer Titas Mutsuddy Quazi Rahman. Outline. Introduction. Service integration. Screen shots of project. Difficulties faced. Conclusion. Introduction. Project Description:

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03-60-569 Project

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03-60-569 Project

Global Book retailer

Titas Mutsuddy

Quazi Rahman


Outline

  • Introduction.

  • Service integration.

  • Screen shots of project.

  • Difficulties faced.

  • Conclusion.


Introduction

Project Description:

Integration of Amazon web service, eBay web service to find out cheap books and convert price to other currencies.


Web services

  • Amazon Web Service.

  • eBay Web service.

  • Currency Converter (XMathods).


Tools used

  • Axis 1.4 (switched from Axis2).

    • WSDL2Java

    • JAX-RPC

  • Tomcat 5.5

  • J2sdk1.5

    • Jsp

    • Servlet

    • Java Bean


Class Diagram


Screen Shots


Screen Shots


Screen Shots


Screen Shots


Screen Shots


Screen Shots


Screen Shots


Screen Shots


Screen shots


Screen Shots


Screen Shots


Difficulties faced

  • Installation of Axis(2.0/1.4).

    • Class path setup.

    • Set up jar files in to lib.

  • Amazon web service call.

    • Set up keys for service call.

    • Soap message call.


Difficulties faced

eBay web service call:

Soap API .

eBay Java SDK (XML based RPC).

System development:

SandBox development environment.

Production development environment.


Difficulties faced

  • Difficulties with eBay:-

    • eBay active auction is so volatile that most of the time auction ended before debugging of codes.

    • eBay API manual is not friendly for new developers.

    • eBay uses their own “ItemID” for each item in active auction.

    • I Failed Item Specific search in eBay. Succeeded on category search.

      • Parsed whole category response xml to pick up item by “Title”.

      • Most of the time Amazon and eBay book title are not same.

      • Tried to find out possible pattern to split the titles to extract the name.


Difficulties faced

eBay web service:-

  • Authentication failure:

    <?xml version="1.0" encoding="UTF-8"?>

    <eBay><EBayTime>2007-03-10 15:46:37</EBayTime><Errors><Error><Code>16112</Code>

    <SeverityCode>1</SeverityCode>

    <Severity>SeriousError</Severity>

    <Line>0</Line><Column>0</Column>

    <ErrorClass>RequestError</ErrorClass>

    <ShortMessage><![CDATA[Invalid authentication method.]]></ShortMessage><LongMessage><![CDATA[The authentication method you are using is invalid. Please use the eBay Authentication & Authorization method.]]></LongMessage></Error></Errors></eBay>


Difficulties faced

  • eBay web service

    “The velocity (rate of change) of eBay is notoriously fast. As anyone who has used eBay knows, things constantly change, and there is a fundamental release every 2 weeks. There are supporters and non-supporters of this, but it's something we all have to live with at this time, both eBay users and eBay employees…..”

    Best Regards,Amish PateleBay Developer Support


Difficulties faced

GetItemRequest fails

<?xml version="1.0" encoding="utf-8"?>

<GetItemRequest xmlns="urn:ebay:apis:eBLBaseComponents"> <DetailLevel>ItemReturnAttributes</DetailLevel> <RequesterCredentials>

<eBayAuthToken>MY TOKEN </eBayAuthToken> </RequesterCredentials>

<ItemID>517203014</ItemID>

</GetItemRequest>


Difficulties faced

<?xml version="1.0" encoding="UTF-8"?>

<GetItemResponse xmlns="urn:ebay:apis:eBLBaseComponents">

<Timestamp>2007-03-12T1 7:17:47.171Z</Timestamp>

<Ack>Failure</Ack>

<Errors>

<ShortMessage>Item not found.</ShortMessage>

<LongMessage>Item &quot;517203014&quot; is invalid, not activated,or no longer in our database, or an Live Auction item.</LongMessage>

<ErrorCode>17</ErrorCode>

<SeverityCode>Error</SeverityCode>

<ErrorParameters ParamID="0">

<Value>517203014</Value>

</ErrorParameters>

<ErrorClassification>RequestError</ErrorClassification>

</Errors>

<Version>503</Version><Build>e503_core_Bundled_4329350_R1</Build>

</GetItemResponse>


Difficulties faced

zhuowei.developersupport@ebay.comPosts: 938 Member Since: 10/20/05 Re: GetItemRequest fails Posted: Mar 14, 2007 4:40 PM  Reply

Hi titasmutsuddy,You need to specify an eBay ItemID but ISBN # in your GetItem API request. You can get the item number in either your item's View Item or the seller's My eBay Selling page.

Best Regards,Zhuowei YangeBay Developer Support


Difficulties faced

<?xml version="1.0" encoding="UTF-8"?>

<GetItemResponse xmlns="urn:ebay:apis:eBLBaseComponents">

<Timestamp>2007-03-14T0 3:22:17.302Z</Timestamp>

<Ack>Failure</Ack>

<Errors>

<ShortMessage>Item not found.</ShortMessage>

<LongMessage>Item &quot;130094932808&quot; is invalid, not activated, or no longer in our database, or an Live Auction item.</LongMessage>

<ErrorCode>17</ErrorCode>

<SeverityCode>Error</SeverityCode>

<ErrorParameters ParamID="0">

<Value>130094932808</Value>

</ErrorParameters>

<ErrorClassification>RequestError</ErrorClassification>

</Errors>

<Version>503</Version>

<Build>e503_core_Bundled_4329350_R1</Build>

</GetItemResponse>


Difficulties faced

GetSearchResultRequest:-

<?xml version='1.0' encoding='utf-8'?>\r\n"+

<GetSearchResultsRequest xmlns=\"urn:ebay:apis:eBLBaseComponents\">

<ExternalProductID> <Value>0876295340</Value>

<Type>ISBN</Type>

</ExternalProductID>

<Pagination>

<EntriesPerPage>2</EntriesPerPage>

<PageNumber>1</PageNumber>

</Pagination>

<RequesterCredentials>

<eBayAuthToken>token</eBayAuthToken>

</RequesterCredentials>

</GetSearchResultsRequest>


Difficulties faced

GetSearchResultResponse:-

<?xml version="1.0" encoding="UTF-8"?>

<GetSearchResultsResponse xmlns="urn:ebay:apis:eBLBaseComponents">

<Timestamp>2007-03-14T19:13:08.706Z</Timestamp>

<Ack>Success</Ack>

<Version>503</Version>

<Build>e503_core_Bundled_4329350_R1</Build>

<ItemsPerPage>100</ItemsPerPage>

<PageNumber>1</PageNumber>

<HasMoreItems>false</HasMoreItems>

<PaginationResult>

<TotalNumberOfPages>1</TotalNumberOfPages>

<TotalNumberOfEntries>0</TotalNumberOfEntries>

</PaginationResult>

<CategoryArray/>

</GetSearchResultsResponse>


Difficulties faced

Error:- Content not allowed in prolog

[Fatal Error] request.xml:1:41: Content is not allowed in prolog.

Error Sending Request: org.xml.sax.SAXParseException: Content is not allowed in

prolog.

org.xml.sax.SAXParseException: Content is not allowed in prolog.

at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)

at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)

at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:172)

at GetSearchResults.SendRequest(GetSearchResults.java:220)

at GetSearchResults.main(GetSearchResults.java:91)


Difficulties faced


Difficulties faced

titasmutsuddyPosts: 4 Member Since: 3/13/07 PKIX path building failed Posted: Mar 14, 2007 9:38 PM  ReplyHi,I am getting a strange error. I didn't get it 4-hours ago. It is like the following:-SendRequest IO Error:javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException:PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:150)at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1518)at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:174)at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:168)and so on------Note that I am using the jre1.5.0_11 and checked for latest version and there is none.I will be pleased if you give any suggestions.Regards,Titas Mutsuddy


Difficulties faced

Response:-

javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException:PKIX path validation failed: java.security.cert.CertPathValidatorException: timestamp check failed

I think Sun changed the default TrustManagerFactory from SunX509 to SunPKIX sometime during the 1.5.0 update cycle. grep ManagerFactory $JAVA_HOME/jre/lib/security/java.security You should be able to override these with system properties.


Difficulties faced

Default:-

ssl.KeyManagerFactory.algorithm=SunX509

ssl.TrustManagerFactory.algorithm=PKIX

OverWritten in the following properties file:- D:\Sun\AppServer\jdk\jre\lib\security\java.security(properties file):-

ssl.KeyManagerFactory.algorithm=PKIX

ssl.TrustManagerFactory.algorithm=PKIX


Difficulties faced

caradtesterPosts: 1 Member Since: 3/10/06 Re: PKIX path building failed Posted: Mar 14, 2007 11:48 PM  ReplyYour JDK is probably missing one of the CA-certs in the path for https://api.sandbox.ebay.comIt seems sandbox may have updated the SSL certificate within the last 24 hours. Hopefully there will be an official update soon.Meanwhile.... you might try this (assuming windows platform):1. In IE, connect to https://api.sandbox.ebay.com2. Go to Tools > Internet Options > Content > Certificates > Intermediate Certification Authorities [or "Trusted Root Certification Authorities"]3. Choose "VeriSign Class 3 Secure Server CA" (I assume this is the certificate that is missing... you can confirm by comparing thumbprints to what is in your keystore)4. Click "Export...", then "Next>"5. Select "DER encoded binary X.509 (.CER)"6. Name the file c:\temp\verisignsecureserver.cer7. Select "Finish"8. \j2sdk1.4.2_08\bin\keytool -keystore \j2sdk1.4.2_08\jre\lib\security\cacerts -import -alias verisignsecureserver -file c:\temp\verisignsecureserver.cer -trustcacerts9. del c:\temp\verisignsecureserver.cerNote that you must have a full JDK installed (not just the JRE) to have access. The default password for the JDK keystore is well-known: changeitPlease post feedback if this worked for you or not.


Difficulties faced

GetSearchResultRequest (Category search succeeded):-

<?xml version='1.0' encoding='utf-8'?>

< GetSearchResultRequest xmlns="urn:ebay:apis:eBLBaseComponents">

<RequesterCredentials>

<eBayAuthToken>token </eBayAuthToken>

</RequesterCredentials>

<ErrorLevel>1</ErrorLevel>

<Query>books</Query>

<MaxResults>2</MaxResults>

<SiteId>0</SiteId>

</GetSearchResultRequest>


Conclusion

  • Rate of change of eBay is notoriously fast.

  • Failed “Item specific” search in eBay web service.

  • eBay XML based Java API is difficult to handle.

  • eBay introduced SOAP based API in mid-2004 and still eBay platform is undergoing significant transition to SOAP.


Future extension

  • Item wise search for eBay.

  • Integrate other available book retailers web service.

  • Try to create the Shopping Cart (Most difficult part of the project).


Questions ?


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