Develop Reference

Android Calling Django Server With POST Data

someone may asked my question already but I cannot find any suggestions.
I writing an Android app which needs to access my Django server by using HttpsURLConnection then Django server will return a JSON array to Android.
The view function in Django will receive the parameters from request.POST and generate the JSON array then return using HTTPResponse Django method. It does not need any Templates and Forms.
When I call the Django view function from Android, it returns 403 error. I know that it is because the POST data does not contains "csrf_token".
My problem is: How can I get the "csrf_token" and put it into my POST data before I send it to Django? I try disable the CSRF checking by "#csrf_exempt" it can return the correct result to Android app but I would not disable the CSRF checking.
Thanks,
Wilson

You have to send the cookies and also have to send a header 'X-CSRFToken' with csrftoken.
This is what I do (may not be the best way):
Get csrf token via a get request.But first try to see if you get a csrftoken cookie by doing same request on your browser with developer tools. If not, you should use ensure_csrf_cookie decorator
from django.views.decorators.csrf import ensure_csrf_cookie
#ensure_csrf_cookie
def your_view(request):
pass
Now using the same HttpUrlConnection object do this :
String cookieString="";
String csrftoken="";
// The below code can be shortened using for-each loop
List<HttpCookie> cookies=cookieManager.getCookieStore().getCookies();
Iterator<HttpCookie> cookieIterator=cookies.iterator();
while(cookieIterator.hasNext()){
HttpCookie cookie=cookieIterator.next();
cookieString+=cookie.getName()+"="+cookie.getValue()+";";
if(cookie.getName().equals("csrftoken")){
csrftoken=cookie.getValue();
}
}
Add the following to your post request:
urlConnection.setRequestProperty("X-CSRFToken", csrftoken);
urlConnection.setRequestProperty("Cookie", cookieString);

Getting callback from payment gateway in webview

I am using Atom Payment Gateway for payments in my Android app. But this provider doesn't have an SDK for mobile platforms, also I cannot choose another provider because my client has been using Atom PG for their website for a long time.
So to make it work, I am now trying to call it in a webview in my app. All goes well until the last step except that I am not able to get the response from the PG upon completion of transaction.
As per their documentation:
After the completion of the transaction, the response will be posted back to the url provided by the merchant.
I already tried setting the return url to my reverse domain name and then setting an intent-filter but that doesn't seem to work.
Is there any method by which I can get the response that the PG "posts back" to the return url?

Here is an idea,
On getting the post request on your return url, you can parse that response and then via javascript send that to the JavascriptInterface linked to your WebView in the app
Intercepting POST data has been discussed:
How to intercept POST data in an android webview
Intercept POST requests in a WebView
Try this project : https://github.com/KeejOow/android-post-webview

How to read the XMLHTTP request body in android

I am working with the web views in android, XMLHTTP requests are sending to the server from my application in the web view, how can i read the HTTP post request body

There are no WebViewClient/WebChromeClient callbacks for this (the closest is shouldInterceptRequest but that only gives you a URL). If the JavaScript is yours use addJavaScriptInterface to pass the request body to the Java code.

Android get request and response objects from webview

is there a way to get request and response objects from a webview?
for requests made from some webpage running in my webview, i want to intercept the full http request object(the headers, http method used, http body etc) and divert and send across that request into another channel.
For responses received from the webview, i want to do the same and get the object and its properties.
So far i have looked at the webviewClient android class which allows you to intercept url links executed by a webpage and intercept the resources it loads.
However, what i want to intercept, is any actual http requests the webpage makes. is this possible in Android webview?
thanks

That is not directly possible. You are welcome to write an HTTP proxy, then attempt to get WebView to work with that (e.g., see if it supports the http.proxyHost and http.proxyPort system properties).

HTTP GET url with Json parameters in Android

I am having the following API call:
http://rollout.gr/api/?query={%22search%22:%22places%22,%22page%22:1}
This API call is executed correctly in my browser. But when I use a DefaultHttpClient to execute this url in my Android application, I get a null response.
I suppose the problem is the JSON data in the HTTP url. Thus, I would like to ask which is the proper way to handle such url in an Android application?
Thanks a lot in advance!

The accolades aren't valid URL characters. The browser is userfriendly enough to automatically URL-encode them, but DefaultHttpClient isn't. The correct line to use from code is:
http://rollout.gr/api/?query=http://rollout.gr/api/?query=%7b%22search%22:%22places%22,%22page%22:1%7d
Note the encoding for the accolades (%7b, %7d).

Your problem may be the strictmode here.
I recommend to do http request in threads or asynctasks. strictmode doesnt let app do http reauest in uithread. maybe your console shows a warning and you get null from http response because of this.
This project may solve your problem:
http://loopj.com/android-async-http/

Not knowing your particular HTTP initialization code, I'm going to assume you didn't provide an explicit JSON accept header. A lot of REST endpoints require this.
httpget.setHeader("Accept", "application/json");