CODEWITHSUNDEEP
javagoogle-app-engineblobstore
GenIce
GenIce

Reputation: 5

recovering programmatically the ServingUrl of a blob uploaded in BlobStore using the BlobInfo?

I want to recover the ServingUrl of a blob uploaded in BlobStore using the BlobInfo entity

My code in My doGet() method is :

        ImagesService imagesService = ImagesServiceFactory.getImagesService();

        Iterator<BlobInfo> iterator = null;
        iterator = new BlobInfoFactory().queryBlobInfos();
        while (iterator.hasNext()) {
            if(iterator.next().getFilename().equals("test.png"))
            { resp.getWriter().println(iterator.next().getBlobKey()) ;//  the result is  <BlobKey: aKQyp27ZfDgvEdPE8QvMAQ>
             resp.getWriter().println(iterator.next().getFilename());//the result is test.png
            BlobKey bk=iterator.next().getBlobKey();
            String urlStr=imagesService.getServingUrl(ServingUrlOptions.Builder.withBlobKey(bk));
            resp.getWriter().println(urlStr);
            }
        }

I got this error :

HTTP ERROR 500

Problem accessing /enrollementfinale. Reason:

INTERNAL_SERVER_ERROR

Caused by:

java.util.NoSuchElementException at com.google.appengine.api.datastore.QueryResultIteratorImpl.next(QueryResultIteratorImpl.java:75) at com.google.appengine.api.datastore.QueryResultIteratorImpl.next(QueryResultIteratorImpl.java:26) at com.google.appengine.api.blobstore.BlobInfoFactory$1.next(BlobInfoFactory.java:108) at com.google.appengine.api.blobstore.BlobInfoFactory$1.next(BlobInfoFactory.java:100) at com.EnrollementFinaleServlet.doGet(EnrollementFinaleServlet.java:135) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:127) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366) at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349) at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.__handle(ContextHandler.java:765) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:490) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

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i will be very grateful if you help me.

Upvotes: 0

Views: 81

Answers (1)

GenIce
GenIce

Reputation: 5

The problem is solved , it was caused by the 2 lines:

resp.getWriter().println(iterator.next().getBlobKey());
resp.getWriter().println(iterator.next().getFilename());

Upvotes: 0

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