I am working on a web application for android phones, which is basically few js and html files packaged using Phonegap for android. I am making http requests to the server, getting some cookies (whose life is 10 yrs). These cookies are set by the response header. Now this works fine for this session, the set cookies are sent with each request. But if a quit the app and restart it, the cookies vanish, and are not sent with the request.
The life of the cookies is 10 yrs. Shouldnt they persist? Please tell me where i am getting it wrong?
EDIT-- I tried saving the cookie in an sqlite db, and then setting it properly in document.cookie before making the ajax call. Still its not being sent. Any ideas...?
Cookies wont persist after the app is closed. Also you cannot directly set the cookies in an xhr object using javascript, according to w3c specifications, so thats why i wasnt able to do that. the solution would be to re-perform the actions which set the cookies in the cookie jar in the first place.
Related
I want to make an android app which will login to my web application using rest API. In browsers we have a concept of cookie which servers use to identify/maintain session with the users.
In Android how would we accomplish it ? I heard that there is a concept of token which is sent by server in response(first time when credentials are validated) and Android app have to send it to server every time it tries to access a resource(protected). So, what is the better way of doing it ?
Do we need to validate the token again and again when the client requests for a resource ?
Honestly, I can't think of a better way of doing this. Token based authentication seems to be pretty standard when dealing with RESTful APIs. Is there any reason you can't do that?
If you don't want to change the server code, then this could be simulated by adding a cookie header to every request you send. But this is basically the same thing that you mentioned above, just not as clean.
And the browser is already sending a token to be validated again and again. Every request has a cookie header that gets validated through your web application on every request, so this isn't a big deal at all.
And, you don't need anything Android specific to accomplish this. In whatever http library you're using I'm sure there is a method you can called or something you can override in order to set custom headers. Use that to set either your cookie header or token header on every request that you need to make.
I need to make a webview application that POST a username and password and then display the webpage logged-in. I must use cookies but i chouldn't find how to do it, tried the traditional ways but nothing.
Has anyone had any experience with xWalkView and how to get/put cookies ?
(I am using xWalkView since the traditional webview on android 4.2.2 can't load HTML5 webpages)
I had the same problem but I did not find the exact answer. Instead, I found a kind of a work around.
As I am using a servlet container, I append a ";jsessionid=" to every request I make to the server.
The other thing than can actually work for you regardless of what backend you use is to make a request to your web server so that it returns a response with a cookie.
For example if you want to add a name=test you could make some xhr request to some url and the response must have the cookie name=test in it. This technique also work for me for session tracking in my java app.
Good luck
(I'm asking this partly for learning purposes, I realize what I'm trying to do might be entirely wrong!)
I have a php file on my website that handles log in and sets a cookie for the user if log in is successful. if setcookie() fails, I error out instead of displaying the rest of the page.
When I try to access this page using my android app (which uses HttpURLConnection with POST), the setcookie() fails. I'm guessing this is because the client isn't a browser and can't handle cookies.
so first of all, is there away for my app to be able to receive cookies from the server and store them? if not, how do you handle maintaining a login session with the user so you dont have to send a username and password, every time you want to access data from the server?
THanks
A couple of notes before the workaround:
The function is called setcookie() not set_cookie()
Android browsers do support cookies afaik, so you probably should look into this further. Perhaps the format of your setcookie call is not valid?
If you can't use cookies, then the workaround is to simulate your own session mechanism by passing your cookie value as a url parameter on every request.
I have an app need login, I use a singleton http client to do everything, so it can track the cookies for me.
But when I launch a browser intent in my app to view some html pages, the app sometimes be killed by low memory, when user come back from the browser, my app activity would be recreated, but the new http client would not contains that login session id.
So I think what I need is to cache the cookies when my app get killed, and then restore it back when the app got recreated. I know there is a CookieSyncManager, but I do not have a full picture of how to use that.
(1) So How can I do that? is Cookie seralizable, I just thought to cache it in the sdcard, maybe a bad idea.
Another more general question maybe:
(2) How to share httpclient with webview/system browser? Not just pass cookies from httpclient to webiew/browser, but also get the cookies when initialize the cookies, How to make the http client and webview/browser share just ONE copy of cookie store in any time?
Use SharedPreferences to store cookies as string.
Take a look at this; http://developer.android.com/reference/android/app/Activity.html#SavingPersistentState
Also android developers use parcelable class, rather than serializable class. I think the reason is performance issues # mobile devices...
I want to make a login application in Android.
Requirement of the project is to store user name and password for two days using cookie.
Is it possible to use cookies? If yes, then how? Can you give me the code?
Note: I can't use web view.
As a commenter already said, you aren't supposed to store password (even in encrypted form) in a cookie. What you can store is a session id. When user logs in the application, the application generates a session id for him/her, which will stay valid for two days. In every request that you make to the application, you add the session id as an HTTP header.
You can store the session id and the datetime it was issued in the preferences. When the user needs to make a new request to the application and the session hasn't expired, you can read the stored value.
If you are not looking to integrate this into the browser, then have a go at this.
If you look at the HTTP protocol, you can see that cookies are sent by the client in plain text in the request. This means you should have your application deliver them every time your request a page. This is not valid for local-only cookies, but I don't think that you're interested in these. If you want to set cookies from the server side, you will have to adapt your application to parse the response and look for cookies. (also HTTP protocol)
For a better view of the raw data you need to send or receive, you can monitor your traffic using Wireshark or a similar tool and see how the request/response look like.
I am currently working on a web-service that I need to implement on iPhone and this is my first idea of doing it. I haven't got to implement this yet (my web service is still not done) so there's not much more I can tell you at the moment.
Edit:
A useful page about this might be the Wikipedia HTTP Cookie page located here.
As Reno said, try to avoid storing the password in the cookie. Instead you should let the server generate a sessionID when logged in and let this ID expire on the Server after two days. SO you can login with the username and the sessionID you generated with logging in once.
I you want, you can store that sessionID in the cookie.