How can I use java.io.File(filePath) in AppEngine?

[Juan de Dios Becerra]

I am trying to use Google + Domains API in GAE, but when I try to create a GoogleCredential I need to use this:

.setServiceAccountPrivateKeyFromP12File(new java.io.File(filePath))

Where filePath is a .p12 extension file(private key for authentication) this file I put in WEB-INF folder and I granted permissions to all, but when I try to create the GoogleCredential I get this error:

java.security.AccessControlException: access denied (java.io.FilePermission /WEB-INF/file.p12 read)

Obviously the file has the correct name in my folder, this process works in my project which is not AppEngine, so I guess is a problem in the way to access files in AppEngine using java.io.File.

If somebody has idea, I would be very thankful.

[Vinny P]

Java I/O classes, such as File, are limited on App Engine. Try using ServletContext's stream services to collect an inputstream, then read the file normally. For example:

InputStream stream = this.getServletContext().getResourceAsStream(path);

 

-----------------

-Vinny P

Technology & Media Advisor

Chicago, IL

App Engine Code Samples: http://www.learntogoogleit.com

[Juan de Dios Becerra]

What you mean when say "then read file normally" is that I can use the same new ava.io.File(filePath) function?

I guess this line:

InputStream stream = this.getServletContext().getResourceAsStream(path);

is only to collect the inputsream that you refer, but I don't use stream variable?

[Alejandro Gonzalez]

Hello Juan, maybe with an example is more clear:

            URI keyURL;

            String fileName = "google_bigq.p12";

            keyURL = BigQueryAPIManager.class.getClassLoader().getResource(fileName).toURI();

            GoogleCredential credential = new GoogleCredential.Builder().setTransport(TRANSPORT)

                    .setJsonFactory(JSON_FACTORY)

                    .setServiceAccountId(EMAIL_ID)

                    .setServiceAccountScopes(SCOPES)

                    .setServiceAccountPrivateKeyFromP12File(new File(keyURL))

                    .build();

Regards,

Alejandro

Alejandro González Rodrigo

www.nextinit.com

alejandro...@nextinit.com
+34  666 57 79 13

2014/1/22 Juan de Dios Becerra <j.bece...@gmail.com>

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[Nick]

This is how we load it during our DI phase:

String certificate = "/someuniqueid-privatekey.p12";

File privateKey = new File(getClass().getResource(certificate).toURI());

...

builder.setServiceAccountPrivateKeyFromP12File(privateKey);

In this example, the p12 file is in our src/main/resources.

[Vizay Soni]

You could also use following:

inputStream = getClass().getClassLoader().getResourceAsStream(APNS_CERTIFICATE_PATH);