I follow the tutorial of Google about blobstore
https://cloud.google.com/appengine/docs/java/blobstore/#Java_Complete_sample_application
However when i deploy the project to app engine i get the 500 Server Error
these are my classes:
serve class:
import java.io.IOException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.google.appengine.api.blobstore.BlobKey;
import com.google.appengine.api.blobstore.BlobstoreService;
import com.google.appengine.api.blobstore.BlobstoreServiceFactory;
public class Serve extends HttpServlet {
private BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
@Override
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws IOException {
BlobKey blobKey = new BlobKey(req.getParameter("blob-key"));
blobstoreService.serve(blobKey, res);
}
}
upload class:
package com.example.photo;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.google.appengine.api.blobstore.BlobKey;
import com.google.appengine.api.blobstore.BlobstoreService;
import com.google.appengine.api.blobstore.BlobstoreServiceFactory;
public class Upload extends HttpServlet {
private BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
@Override
public void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
Map<String, List<BlobKey>> blobs = blobstoreService.getUploads(req);
List<BlobKey> blobKeys = blobs.get("myFile");
if (blobKeys == null || blobKeys.isEmpty()) {
res.sendRedirect("/");
} else {
res.sendRedirect("/serve?blob-key=" + blobKeys.get(0).getKeyString());
}
}
}
index.jsp
<%@ page import="com.google.appengine.api.blobstore.BlobstoreServiceFactory" %>
<%@ page import="com.google.appengine.api.blobstore.BlobstoreService" %>
<html>
<head>
<title>Upload Test</title>
</head>
<body>
<form action="<%= blobstoreService.createUploadUrl("/upload") %>" method="post" enctype="multipart/form-data">
<input type="text" name="foo">
<input type="file" name="myFile">
<input type="submit" value="Submit">
</form>
</body>
</html>
web.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" version="2.5">
<servlet>
<servlet-name>Upload</servlet-name>
<servlet-class>com.direction.investor.fileuploader.Upload</servlet-class>
</servlet>
<servlet>
<servlet-name>Serve</servlet-name>
<servlet-class>com.direction.investor.fileuploader.Serve</servlet-class>
<servlet-mapping>
<servlet-name>Upload</servlet-name>
<url-pattern>/upload</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Serve</servlet-name>
<url-pattern>/serve</url-pattern>
</servlet-mapping>
appengine-web.xml
<?xml version="1.0" encoding="utf-8"?>
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
<application>optical-wall-92019</application>
<version>1</version>
<!--
Allows App Engine to send multiple requests to one instance in parallel:
-->
<threadsafe>true</threadsafe>
<!-- Configure serving/caching of GWT files -->
<static-files>
<include path="**" />
<!-- The following line requires App Engine 1.3.2 SDK -->
<include path="**.nocache.*" expiration="0s" />
<include path="**.cache.*" expiration="365d" />
<exclude path="**.gwt.rpc" />
</static-files>
<!-- Configure java.util.logging -->
<system-properties>
<property name="java.util.logging.config.file" value="WEB-INF/logging.properties"/>
</system-properties>
<!--
HTTP Sessions are disabled by default. To enable HTTP sessions specify:
<sessions-enabled>true</sessions-enabled>
It's possible to reduce request latency by configuring your application to
asynchronously write HTTP session data to the datastore:
<async-session-persistence enabled="true" />
With this feature enabled, there is a very small chance your app will see
stale session data. For details, see
http://code.google.com/appengine/docs/java/config/appconfig.html#Enabling_Sessions
-->
</appengine-web-app>
what am i doing wrong ?
3 comments:
hii,
thanks for sharing your views.
reagrds
seo
hii,
thanks for sharing your views.
reagrds
dm
hii,
thanks for sharing your views.
reagrds
smo
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