Google plus-cmdline-sample

Question

I try to access my Google+ Account in Order to get my Data. Now, I found the sample but it does not work properly...

See here:

My problem is in line 70!

If I try to run this program following Exception is thrown

Exception in thread "main" java.lang.NoClassDefFoundError: javax/servlet/http/HttpServletRequest
at com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver.getRedirectUri(LocalServerReceiver.java:97)
at com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp.authorize(AuthorizationCodeInstalledApp.java:71)
at com.google.api.services.samples.plus.cmdline.PlusSample.authorize(PlusSample.java:70)
at com.google.api.services.samples.plus.cmdline.PlusSample.main(PlusSample.java:77)
Caused by: java.lang.ClassNotFoundException: javax.servlet.http.HttpServletRequest
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 4 more

---

Now i tried the google-plus-java-starter project.

I registered on the console, got my client_id and client_secret and my API-key but now an exception is thrown.

Attempting to open a web browser to start the OAuth2 flow
Once you authorize please enter the code here: [entered myCode here]

============== Get my Google+ profile ==============

Okt 15, 2012 2:00:06 PM Sample getProfile
Schwerwiegend: {
"error": {
"errors": [
{
"domain": "usageLimits",
"reason": "dailyLimitExceededUnreg",
"message": "Daily Limit for Unauthenticated Use Exceeded. Continued use requires signup.",
"extendedHelp": "https://code.google.com/apis/console"
}
],
"code": 403,
"message": "Daily Limit for Unauthenticated Use Exceeded. Continued use requires signup."
}
}

Exception in thread "main" java.io.IOException: Stream closed
at java.util.zip.GZIPInputStream.ensureOpen(Unknown Source)
at java.util.zip.GZIPInputStream.read(Unknown Source)
at java.io.FilterInputStream.read(Unknown Source)
at com.google.api.client.http.HttpResponse.parseAsString(HttpResponse.java:464)
at Sample.main(Sample.java:45)

Answer 1

Well, the simple answer to your problem is on this cause:

Caused by: java.lang.ClassNotFoundException: javax.servlet.http.HttpServletRequest

The Java Runtime is looking for HttpServletRequest class and can't find it in the classpath.

HttpServletRequest can only be found in Java EE framework (Servlet framework) and can only be invoked through a Web Container / Application Server (since it's a Servlet).

What you're trying to do is do an OAuth 2 dance, and in the dance, the service provider (the server whom you sent a request) does an HTTP redirect to your Web application. What I'm trying to say is that OAuth dance must be done as a web application.

To run your Sample as a standalone, you will, essentially, run a Servlet outside of the web container. This, essentially, means that you will have to write a HTTP layer that listens to port, translate the HTTP protocols in HttpServletRequest and be able to receive HttpServletResponse and populate back the HTTP response (see related SO question).

I don't know how the Sample link you've provided was run, but I'm pretty sure that a Servlet container was used (probably through a test case?)

Good luck! :-)

Answer 2

There is also the Plus java starter examples available here:

https://code.google.com/p/google-plus-java-starter/

These include a command line example that should work.