CODEWITHSUNDEEP
server-errorgoogle-cloud-storage
ptgamr
ptgamr

Reputation: 594

How to access Cloud Storage file from App running at local

I have just success on writing the file to the Google cloud Storage and reading it. Everything is fine after I deploy the app to appspot, but I got errors when running it local:

INTERNAL_SERVER_ERROR
    Caused by:java.io.IOException
        at com.google.appengine.api.files.FileServiceImpl.translateException(FileServiceImpl.java:586)
        at com.google.appengine.api.files.FileServiceImpl.makeSyncCall(FileServiceImpl.java:561)
    ......

Does any one of you know how to access Google Cloud Storage file from localhost?

Upvotes: 6

Views: 2668

Answers (3)

Dave
Dave

Reputation: 3570

I was able to find and use the simulated service mentioned above. Unfortunately for this thread, I don't know Java. But it's usage in Python is as follows...

$ python2.7 google_appengine/google/appengine/tools/api_server.py --application myapp

(Note that api_server.py requires Python 2.7 because it depends on the argparse module.)

Somebody else will have to figure out how to do the same in Java. Sorry. :(

EDIT: The api_server.py is in the base directory:

$ python2.7 google_appengine/api_server.py

Upvotes: 0

user1317673
user1317673

Reputation: 49

To run it "pseudo" locally (like on a command-line), you should first deploy it and then use HttpClient to connect to your server. That way you can interact with your servlet/jsp from the command line and not have to submit forms with file attachments

Sample code [You can certainly get more creative than that]

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.client.ClientProtocolException;


public class FileUploaderClient {

    /**
     * @param args
     */
    public static void main(String[] args) throws ClientProtocolException, IOException{
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost("http://<app-version>.<app-name>.appspot.com/<servlet-name>");
        MultipartEntity reqEntity = new MultipartEntity();
        FileBody bin = new FileBody(new File("<File you want to upload>"));
        reqEntity.addPart("file", bin);
        httppost.setEntity(reqEntity);
        HttpResponse response = httpclient.execute(httppost);
        System.out.println(response.getStatusLine());

    }

}

Now you would have the ability to call your servlet in a loop for example instead of submitting your form multiple times

Upvotes: -1

Marc Cohen
Marc Cohen

Reputation: 3808

The App Engine developer test environment supports a local simulation of Google Cloud Storage but doesn't provide RPC access to the real thing. So, your code should work in both environments, but you should think of the two modes as having distinct name spaces and content. So if, for example, your code expects to see a particular bucket foo containing an object bar, you'll want to separately create that bucket/object and ensure it contains reasonable content in order for the local developer mode to work as expected.

Upvotes: 7

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