Question

The following snippet generates an error in the IDE and when I click to deploy the application.

        <form  action="<%= blobstoreService.createUploadUrl("/upload") %>" method="post" enctype="multipart/form-data">
          <input type="file" name="myFile"/>
          <input type="submit" value="submit"/>

Errors :

error: cannot find symbol
[javac]       out.print( blobstoreService.createUploadUrl("/upload") );
[javac]                  ^
[javac]   symbol:   variable blobstoreService
[javac]   location: class UploadTester_jsp
[javac] 1 error

What do I need to add ? Why do I get this error ?

Answer 1

You have to declare and then initialize variable blobstoreService.

<%@ page import="com.google.appengine.api.blobstore.BlobstoreServiceFactory" %>
<%@ page import="com.google.appengine.api.blobstore.BlobstoreService" %>
....

<%
    BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
%>

Above is directly from documentation.