How do I make an http request using cookies on Android

Question

I d like to make an http request to a remote server while properly handling cookies  eg  storing cookies sent by the server  and sending those cookies when I make subsequent requests    It d be nice to preserve any and all cookies  but really the only one I care about is the session cookie   With java net  it appears that the preferred way to do this is using java net CookieHandler  abstract base class  and java net CookieManager  concrete implementation    Android has java net CookieHandler  but it does not seem to have java net CookieManager   I could code it all by hand by inspecting http headers  but it seems like there must be an easier way   What is the proper way to make http requests on Android while preserving cookies

User · Accepted Answer

It turns out that Google Android ships with Apache HttpClient 4.0, and I was able to figure out how to do it using the "Form based logon" example in the HttpClient docs:

https://github.com/apache/httpcomponents-client/blob/master/httpclient5/src/test/java/org/apache/hc/client5/http/examples/ClientFormLogin.java

import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.cookie.Cookie;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;

/**
 * A example that demonstrates how HttpClient APIs can be used to perform
 * form-based logon.
 */
public class ClientFormLogin {

    public static void main(String[] args) throws Exception {

        DefaultHttpClient httpclient = new DefaultHttpClient();

        HttpGet httpget = new HttpGet("https://portal.sun.com/portal/dt");

        HttpResponse response = httpclient.execute(httpget);
        HttpEntity entity = response.getEntity();

        System.out.println("Login form get: " + response.getStatusLine());
        if (entity != null) {
            entity.consumeContent();
        }
        System.out.println("Initial set of cookies:");
        List<Cookie> cookies = httpclient.getCookieStore().getCookies();
        if (cookies.isEmpty()) {
            System.out.println("None");
        } else {
            for (int i = 0; i < cookies.size(); i++) {
                System.out.println("- " + cookies.get(i).toString());
            }
        }

        HttpPost httpost = new HttpPost("https://portal.sun.com/amserver/UI/Login?" +
                "org=self_registered_users&" +
                "goto=/portal/dt&" +
                "gotoOnFail=/portal/dt?error=true");

        List <NameValuePair> nvps = new ArrayList <NameValuePair>();
        nvps.add(new BasicNameValuePair("IDToken1", "username"));
        nvps.add(new BasicNameValuePair("IDToken2", "password"));

        httpost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));

        response = httpclient.execute(httpost);
        entity = response.getEntity();

        System.out.println("Login form get: " + response.getStatusLine());
        if (entity != null) {
            entity.consumeContent();
        }

        System.out.println("Post logon cookies:");
        cookies = httpclient.getCookieStore().getCookies();
        if (cookies.isEmpty()) {
            System.out.println("None");
        } else {
            for (int i = 0; i < cookies.size(); i++) {
                System.out.println("- " + cookies.get(i).toString());
            }
        }

        // When HttpClient instance is no longer needed, 
        // shut down the connection manager to ensure
        // immediate deallocation of all system resources
        httpclient.getConnectionManager().shutdown();        
    }
}

User · Answer

A cookie is just another HTTP header  You can always set it while making a HTTP call with the apache library or with HTTPUrlConnection  Either way you should be able to read and set HTTP cookies in this fashion    You can read this article for more information   I can share my peace of code to demonstrate how easy you can make it   public static String getServerResponseByHttpGet String url  String token             try               HttpClient client   new DefaultHttpClient                HttpGet get   new HttpGet url               get setHeader  Cookie    PHPSESSID     token                     Log d TAG   Try to open   gt      url                HttpResponse httpResponse   client execute get               int connectionStatusCode   httpResponse getStatusLine   getStatusCode                Log d TAG   Connection code      connectionStatusCode     for request      url                HttpEntity entity   httpResponse getEntity                String serverResponse   EntityUtils toString entity               Log d TAG   Server response for request     url       gt      serverResponse                if  isStatusOk connectionStatusCode                   return null               return serverResponse             catch  UnsupportedEncodingException e                e printStackTrace              catch  ClientProtocolException e                e printStackTrace              catch  IOException e                e printStackTrace              catch  IllegalArgumentException e                e printStackTrace              catch  Exception e                e printStackTrace                       return null

User · Answer

I do not work with google android but I think you ll find it s not that hard to get this working  If you read the relevant bit of the java tutorial you ll see that a registered cookiehandler gets callbacks from the HTTP code    So if there is no default  have you checked if CookieHandler getDefault   really is null   then you can simply extend CookieHandler  implement put get and make it work pretty much automatically  Be sure to consider concurrent access and the like if you go that route   edit  Obviously you d have to set an instance of your custom implementation as the default handler through CookieHandler setDefault   to receive the callbacks  Forgot to mention that

User · Answer

Since Apache library is deprecated  for those who want to use HttpURLConncetion   I wrote this class to send Get and Post Request with the help of this answer   public class WebService    static final String COOKIES HEADER    Set-Cookie   static final String COOKIE    Cookie    static CookieManager msCookieManager   new CookieManager     private static int responseCode   public static String sendPost String requestURL  String urlParameters         URL url      String response           try           url   new URL requestURL            HttpURLConnection conn    HttpURLConnection  url openConnection            conn setReadTimeout 15000           conn setConnectTimeout 15000           conn setRequestMethod  POST             conn setRequestProperty  Content-Type    application json  charset utf-8             if  msCookieManager getCookieStore   getCookies   size    gt  0                  While joining the Cookies  use     or     as needed  Most of the server are using                 conn setRequestProperty COOKIE                       TextUtils join      msCookieManager getCookieStore   getCookies                         conn setDoInput true           conn setDoOutput true            OutputStream os   conn getOutputStream            BufferedWriter writer   new BufferedWriter                  new OutputStreamWriter os   UTF-8              if  urlParameters    null                writer write urlParameters                     writer flush            writer close            os close             Map lt String  List lt String gt  gt  headerFields   conn getHeaderFields            List lt String gt  cookiesHeader   headerFields get COOKIES HEADER            if  cookiesHeader    null                for  String cookie   cookiesHeader                    msCookieManager getCookieStore   add null  HttpCookie parse cookie  get 0                                     setResponseCode conn getResponseCode              if  getResponseCode      HttpsURLConnection HTTP OK                 String line              BufferedReader br   new BufferedReader new InputStreamReader conn getInputStream                  while   line   br readLine       null                    response    line                          else               response                       catch  Exception e            e printStackTrace               return response         HTTP GET request public static String sendGet String url  throws Exception        URL obj   new URL url       HttpURLConnection con    HttpURLConnection  obj openConnection            optional default is GET     con setRequestMethod  GET           add request header      con setRequestProperty  User-Agent    Mozilla                 https   stackoverflow com questions 16150089 how-to-handle-cookies-in-httpurlconnection-using-cookiemanager       Get Cookies form cookieManager and load them to connection              if  msCookieManager getCookieStore   getCookies   size    gt  0              While joining the Cookies  use     or     as needed  Most of the server are using             con setRequestProperty COOKIE                   TextUtils join      msCookieManager getCookieStore   getCookies                          https   stackoverflow com questions 16150089 how-to-handle-cookies-in-httpurlconnection-using-cookiemanager       Get Cookies form response header and load them to cookieManager              Map lt String  List lt String gt  gt  headerFields   con getHeaderFields        List lt String gt  cookiesHeader   headerFields get COOKIES HEADER       if  cookiesHeader    null            for  String cookie   cookiesHeader                msCookieManager getCookieStore   add null  HttpCookie parse cookie  get 0                          int responseCode   con getResponseCode         BufferedReader in   new BufferedReader              new InputStreamReader con getInputStream          String inputLine      StringBuffer response   new StringBuffer         while   inputLine   in readLine       null            response append inputLine             in close         return response toString       public static void setResponseCode int responseCode        WebService responseCode   responseCode      Log i  Milad    responseCode    responseCode       public static int getResponseCode         return responseCode

[java] How do I make an http request using cookies on Android?

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