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Open an authenticated image served by django from java using Apache http client

I Am serving an authenticated image using django. The image is behind a view which require login, and in the end I have to check more things than just the authentication.
Because of a reason to complicated to explain here, I cannot use the real url to the image, but I Am serving it with a custom url leading to the authenticated view.
From java the image must be reachable, to save or display. For this part I use Apache httpclient.
In Apacahe I tried a lot of things (every example and combination of examples...) but can't seem to get it working.
For other parts of the webapp I use django-rest-framwork, which I succesfully connected to from java (and c and curl).
I use the login_reuired decorator in django, which makes the attempt to get to the url redirect to a login page first.
Trying the link and the login in a webviewer, I see the 200 code (OK) in the server console.
Trying the link with the httpclient, I get a 302 Found in the console.... (looking up 302, it means a redirect..)
this is what I do in django:
in urls.py:
url(r'^photolink/(?P<filename>.*)$', 'myapp.views.photolink',name='photolink'),
in views.py:
import mimetypes
import os
#login_required
def photolink(request, filename):
# from the filename I get the image object, for this question not interesting
# there is a good reason for this complicated way to reach a photo, but not the point here
filename_photo = some_image_object.url
base_filename=os.path.basename(filename_photo)
# than this is the real path and filename to the photo:
path_filename=os.path.join(settings.MEDIA_ROOT,'photos',mac,base_filename)
mime = mimetypes.guess_type(filename_photot)[0]
logger.debug("mimetype response = %s" % mime)
image_data = open(path_filename, 'rb').read()
return HttpResponse(image_data, mimetype=mime)
by the way, if i get this working i need another decorator to pass some other tests....
but i first need to get this thing working....
for now it's not a secured url.... plain http.
in java i tried a lot of things... using apache's httpclient 4.2.1
proxy, cookies, authentication negociation, with follow redirects... and so on...
Am I overlooking some basic thing here?...
it seems the login of the website client is not suitable for automated login...
so the problem can be in my code in django....or in the java code....

In the end the problem was, using HTTP authorization.
Which is not by default used in the login_required decorator.
adding a custom decorator that checks for HTTP authorization did the trick:
see this example: http://djangosnippets.org/snippets/243/

How to get the url with freemarker template?

I want to fetch current URL with free marker.
Also i need to split the url href part.Is there any method similar to JavaScript method location.href.
Ex: http://www.barcamp.com/homepage/overview.go.
Here i need to fetch the url & also to the split the url and get its as /homepage/overview.go
Please help us on this issue

Getting the current URL falls outside FreeMarker's jurisdiction, since it's independent of Servlets and HTTP. It's up to the Web application framework if and how it exposes that information for the templates, so check the documentation of the framework.

how do i know whether my html link is clicked or not from Servlet?

My Servlet response type is html and my response contains a hyperlink to another web site.So, now i want to capture the information about whether the user clicked the link or not? and also calculate the total clicks? i am using Tomcat 7 as a server.
Is this possible in setting response header (302 or 404)?...
Please Guide me to get out of this issue?

Yes, you can use a 302: instead of providing the link to the other website, you provide a link to your own servlet, do your accounting and then send back a redirection (301/302) http status with the other web-site URL in the response Location header.
This maybe a bit simplistic though, since the user will leave your original page (is this what you want ?) and search engines may not like this if your web app is public.

I think right now you are redirecting the request(link for another website) at client side.In this approach your server cannot get the information about the click.
What you can do create a servlet and call this servlet on click now this servlet is responsible to redirect the request to another website. Add an static integer counter and increment this when servlet call each time.

Use the method setStatus():-
setStatus(HttpServletResponse.SC_FOUND);
or
setStatus(HttpServletResponse.SC_NOT_FOUND);

Simple example of JQuery Address to manage application state

I'm using the jQuery Address library to re-write my URL depending on what the user is doing in the page. The intention is to allow users to bookmark pages and come back later. The page never refreshes as all server interaction is done via ajax.
jQuery Address is writing URLs like this:
http://localhost:9000/#/u/scott_tiger
I need a to set up a route in Play to be able to route that request through to the appropriate controller. So I set this up:
GET /#/u/{username} Controller.showUser
This doesn't work though, the route definition gets ignored. I've tried loads of things such as trying to escape the "#" and replacing it with a variable that I've populated with Character.toString(35). None of this works.
Does anyone know how I can either define the route properly or get jQuery Address not to write the "#".
EDIT: The "#" doesn't get sent to the server does it. Doh! OK, question is revised.

No. The # and the part of the URL after that is not sent to the server. So your play app on the server will never see such URLs.
HTML5 solution
You need to handle these URLs on the client side using JavaScript. In modern browsers with good HTML5 support, you can modify the address without reloading the page. See Manipulating the browser history on how to do it for these browsers. And see When can I use... for browser support.
#-URLs
On Internet Explorer and older versions of other browsers you need to use # URLs and use JavaScript to load the state (e.g. get the user page /u/scott_tiger in your example). See How to run a JavaScript function when the user is visiting an hash link (#something) using JQuery? for how to do this in JavaScript. Also if a user bookmarks a page with a #-URL you need to reload the state.
See also: What's the shebang/hashbang (#!) in Facebook and new Twitter URLs for?
JavaScript libraries
You may use JavaScript libraries to handle this for you history.js is an example. Also bigger frameworks like Backbone.js handle this.
Does anyone know how I can get jQuery Address not to write the "#".
If you don't write the #-part of the URL, the state can not be linked. So you can not get back to e.g. Scott Tigers profile page if you bookmark the page, because the URL is only http://localhost:9000/ and you will arrive on the front page, while the user though he would arrive on the profile page.

Armed with my new understanding of URLs (thanks #Jonas) I realised that I'd missed half of the story.
I'm using JQuery Address to change the URL depending on what you click in the application. This works great and on lots of browsers. What I was missing was using JQuery Address to watch for external address changes (bookmarks, history, back/forward) and respond accordingly. i.e. set the page up correctly by firing the appropriate Ajax calls and rendering that data appropriately.
Changing the address
$.address.title("new title describing application state");
$.address.parameter("q", "val1");
$.address.parameter("g", "val2");
$.address.update();
Restoring the state
$.address.externalChange(function(event) {
var val1 = event.parameters["q"];
var val2 = event.parameters["g"];
// do something with those values
});

Is there any way of changing gmail password programmatically using java?

Is there any way of changing gmail password programmatically using java?

The google provisioning API guide has updateUser method which takes a UserEntry object. You can use it to update the password I suppose, you will have to try it out. Check the javadocs for definition of UserEntry

I would have been very surprised if you could, and it doesn't look like it.
This page shows you the list of settings you can change in the Google Apps "Email Settings API", and change-password isn't there.
http://code.google.com/googleapps/domain/email_settings/developers_guide_protocol.html#GA_email_settings_api_ops
HTH

I think yes. You can record all operation with web pages by Selenium, test if all ok, and after export to java code - only problem can arise if Google will use CAPCHA

Uh, just use an http client to post this web page: https://www.google.com/accounts/b/0/EditPasswd. Use http://hc.apache.org/httpclient-3.x/ or something similar. You'll need to keep track of cookies properly, so google thinks you are logged in when you load the page. But yeah, obviously it is possible. If your browser can do it, you can do it programmatically through sending http requests. If you want to be double careful, you can use something like tamperdata in firefox to sniff exactly what your browser sends when you request a password change, so you don't miss any silent fields or whatnot.

Using Google Provisioning API, to change the password, you have to set it to login attribute of UserEntry object:
import sample.appsforyourdomain.AppsForYourDomainClient;
...
AppsForYourDomainClient client = new AppsForYourDomainClient(email, password, domain);
UserEntry user = client.retrieveUser("username");
user.getLogin().setPassword("newpassword");
client.updateUser("username", user);