Google Blobstore App Engine教程

Question

Update see below

I'm trying to build this blobstore app engine sample from this google tutorial:

https://developers.google.com/appengine/docs/java/blobstore/#Uploading_a_Blob

This is what I have. I can select a file to upload.

http://instantedituploader.appspot.com/

When I hit submit I get this error:

    Error: Not Found

    The requested URL /%3C%=%20blobstoreService.createUploadUrl(?foo=&myFile=sprayerpic.jpg was not found on this server.

I'm fairly certain I'm missing:

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

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

I took it out because I couldn't figure out how to include that in the index.html. The tutorial uses a jsp file to include the above and the html for the upload form/submit. How do I do this?

UPDATE----------------------

Ok I switched the index.jsp to my welcome file. Now I get a 500 Server Error this is what shows up in the app engine console and I also get a /favicon.ico error too.

013-09-18 08:33:08.601 / 500 3477ms 0kb Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.4 (KHTML, like Gecko) Ubuntu/12.10 Chromium/22.0.1229.94 Chrome/22.0.1229.94 Safari/537.4
W 2013-09-18 08:33:08.412 EXCEPTION java.lang.ClassNotFoundException: Serve at com.google.appengine.runtime.Request.process-cb1588546d641fbb(Request.java) at java.lang.Class
E 2013-09-18 08:33:08.414 javax.servlet.ServletContext log: unavailable javax.servlet.UnavailableException: Serve at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:79)
W 2013-09-18 08:33:08.419 EXCEPTION java.lang.ClassNotFoundException: Upload at com.google.appengine.runtime.Request.process-cb1588546d641fbb(Request.java) at java.lang.Clas
E 2013-09-18 08:33:08.420 javax.servlet.ServletContext log: unavailable javax.servlet.UnavailableException: Upload at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:79)
W 2013-09-18 08:33:08.591 Failed startup of context com.google.apphosting.utils.jetty.RuntimeAppEngineWebAppContext@d206ca{/,/base/data/home/apps/s~instantedituploader/1.370311
C 2013-09-18 08:33:08.597 Uncaught exception from servlet javax.servlet.UnavailableException: Initialization failed. at com.google.apphosting.runtime.jetty.AppVersionHandlerMa
I 2013-09-18 08:33:08.600 This request caused a new process to be started for your application, and thus caused your application code to be loaded for the first time. This requ

Answer 1

The files in the example are Java Server Pages. See the docs on how to use JSPs with GAE .

You should rename index.html to index.jsp and set it as a welcome file in your web.xml (welcome page is served when user invokes the root / ):

<welcome-file-list>
    <welcome-file>path/to/index.jsp</welcome-file>
</welcome-file-list>