Access Internet service using SAP Cloud Platform + jndi

With Internet Service http://maps.googleapis.com/maps/api/distancematrix/xml?origins=Walldorf&destinations= Berlin, for example,

Access this URL in the browser to get the output: the distance from Walldorf to Berlin.

How can a Java application deployed to the SAP Cloud Platform also have access to the Internet service?

Start by creating a destination in the SAP Cloud platform to maintain the end point of the service:

Use the destination created in the SAP cloud Platform in Java code:

Then use the Jndi service to read the URL configured in destination:

After deploying to the SAP cloud Platform, see the preview results in eclipse:

The SAP cloud platform cockpit appears as follows:

Browser access is as follows:

Xml:

<?xml version= "1.0" encoding= "UTF-8"? ><web-app xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance" xmlns= "Http://java.sun.com/xml/ns/javaee" xmlns:web= "http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi: schemalocation= "Http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id= "Webapp_  ID "version=" 2.5 "> <!--Main sample servlet mapped to/so that the integration test harness can detect readiness        (generic for all samples)-<servlet> <servlet-name>ConnectivityServlet</servlet-name> <servlet-class>com.sap.cloud.sample.connectivity.ConnectivityServlet</servlet-class> </servlet&    Gt <servlet-mapping> <servlet-name>ConnectivityServlet</servlet-name> <url-pattern>/&lt ;/url-pattern> </servlet-mapping> <!--Declare The JNDI lookup of destination--and <resource-ref > <res-ref-name>connectivityconfiguratIon</res-ref-name> <res-type>com.sap.core.connectivity.api.configuration.connectivityconfiguration </res-type> </resource-ref></web-app>

Package Com.sap.cloud.sample.connectivity;import Java.io.ioexception;import Java.io.inputstream;import Java.io.outputstream;import Java.net.httpurlconnection;import Java.net.inetsocketaddress;import Java.net.Proxy; Import Java.net.url;import Javax.annotation.resource;import Javax.naming.context;import Javax.naming.initialcontext;import Javax.servlet.servletexception;import Javax.servlet.http.httpservlet;import Javax.servlet.http.httpservletrequest;import Javax.servlet.http.httpservletresponse;import Org.slf4j.Logger; Import Org.slf4j.loggerfactory;import Com.sap.cloud.account.tenantcontext;import Com.sap.core.connectivity.api.configuration.connectivityconfiguration;import Com.sap.core.connectivity.api.configuration.destinationconfiguration;public class ConnectivityServlet extends    HttpServlet {@Resource private tenantcontext tenantcontext;    Private static final long serialversionuid = 1L;    private static final int copy_content_buffer_size = 1024; private static Final Logger LOGGER = Loggerfactory.getlogger (Connectivityservlet.class);    private static final String On_premise_proxy = "Onpremise"; @Override public void doget (HttpServletRequest request, httpservletresponse response) throws Servletexception, ioexcept        Ion {httpurlconnection urlconnection = null;        String destinationname = Request.getparameter ("Destname");        if (Destinationname = = null) {Destinationname = "google_map";            } try {Context ctx = new InitialContext (); Connectivityconfiguration configuration = (connectivityconfiguration) ctx.lookup ("java:comp/env/            Connectivityconfiguration ");            Destinationconfiguration destconfiguration = configuration.getconfiguration (destinationname);                        if (destconfiguration = = null) {Response.senderror (Httpservletresponse.sc_internal_server_error, String.Format ("Destination%s is not found. Hint: "+" Make SuRe to the destination configured. ", Destinationname));            Return            } String value = Destconfiguration.getproperty ("URL");            URL url = new URL (value + "Xml?origins=walldorf&destinations=paris");            String Proxytype = Destconfiguration.getproperty ("Proxytype");            Proxy proxy = GetProxy (Proxytype);            URLConnection = (httpurlconnection) url.openconnection (proxy);            Injectheader (URLConnection, Proxytype);            InputStream instream = Urlconnection.getinputstream ();            OutputStream OutStream = Response.getoutputstream ();        CopyStream (instream, OutStream);                    } catch (Exception e) {String errormessage = "Connectivity operation failed with reason:" + e.getmessage () + ". See ' + ' logs for details. Hint:make sure to a HTTP proxy configured in your ' + ' local environment in case your ENVIRONMENT uses "+" an HTTP proxy for the outbound Internet "+" communication. ";            Logger.error ("Connectivity operation failed", E);        Response.senderror (Httpservletresponse.sc_internal_server_error, errormessage);        }} Private Proxy GetProxy (String proxytype) {Proxy proxy = Proxy.no_proxy;        String proxyhost = null;        String proxyport = null; if (On_premise_proxy.equals (Proxytype)) {//Get PROXY for on-premise destinations proxyhost = Syste            M.getenv ("Hc_op_http_proxy_host");        ProxyPort = system.getenv ("Hc_op_http_proxy_port");            } else {//Get proxy for Internet destinations ProxyHost = System.getproperty ("Https.proxyhost");        ProxyPort = System.getproperty ("Https.proxyport"); } if (ProxyPort = null && proxyhost! = null) {int proxyportnumber = Integer.parseint (proxyport      );      Proxy = new Proxy (Proxy.Type.HTTP, new Inetsocketaddress (ProxyHost, Proxyportnumber));    } return proxy; } private void Injectheader (HttpURLConnection urlconnection, String proxytype) {if (On_premise_proxy.equals (pro Xytype) {//Insert header for On-premise connectivity with the consumer account name URLConnection . Setrequestproperty ("Sap-connectivity-consumeraccount", Tenantcontext.gettenant (). Getaccount (). GetId ())        ; }} private void CopyStream (InputStream instream, OutputStream outstream) throws IOException {byte[] buffer        = new Byte[copy_content_buffer_size];        int Len;        while (len = instream.read (buffer))! =-1) {outstream.write (buffer, 0, Len); }    }}

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Access Internet service using SAP Cloud Platform + jndi