Http POST SDK 1.0

cassianotartari · by **cassianotartari** » Fri Nov 07, 2008 2:00 pm

Hi,

For many: my solution for Http Post

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Using java Syntax Highlighting

package gpsbusca.com.br;
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
 
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.CookieStore;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
 
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
 
public class HttpPostConnection extends Activity {
        
        private CookieStore cookies;
        private boolean isAuthenticated;
        private ArrayList<BasicNameValuePair> pairs;
        private DefaultHttpClient httpclient;
        private HttpPost httppost;
        private InputStream conteudo;
        private String retornoConexao;
        
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
  
        //example of use
        Map<String,String> vars = new HashMap<String,String>();
        vars.put("login", "login");
        vars.put("password", "password");
        vars.put("action", "del");
  
        parametrosHttp("http://www.rgcarros.com.br", vars);
        go();
    }
        
        public void parametrosHttp(String url, Map<String,String> variables) {
                this.httpclient = new DefaultHttpClient();
                this.httppost = new HttpPost(url);
                this.pairs = new ArrayList();
                if(variables != null){
                        Set keys = variables.keySet();
                        for(Iterator i = keys.iterator(); i.hasNext();) {
                                String key = (String)i.next();
                                pairs.add(new BasicNameValuePair(key, variables.get(key)));
                        }
                }
        }
        
        public String go(){
                try {
                    UrlEncodedFormEntity p_entity = new UrlEncodedFormEntity(pairs, "ISO-8859-1");
                
                    /** Assign the POST data to the entity */
                    httppost.setEntity(p_entity);
                
                    /** Perform the actual HTTP POST */
                    HttpResponse response = httpclient.execute(httppost);
                    HttpEntity entity = response.getEntity();
                    conteudo = entity.getContent();
                    this.retornoConexao = convertStreamToString(conteudo);
                    Log.d("HttpPostConnection",">>>>>>>>>>>>>>> "+retornoConexao);
                    int status_code = response.getStatusLine().getStatusCode();
                    this.cookies = httpclient.getCookieStore();
                    if (status_code >= 300) {
                        this.isAuthenticated = false;
                    } else {
                        this.isAuthenticated = true;
                    }
                } catch (UnsupportedEncodingException uee) {
                    // Woops
                } catch (IOException ioe) {
                    // Woops
                } catch(IllegalStateException ise) {
                        // woops
                }
                return retornoConexao;
        }
        
        public String convertStreamToString(InputStream is) {
                BufferedReader reader = new BufferedReader(new InputStreamReader(is));
                StringBuilder sb = new StringBuilder();
 
                String line = null;
                try {
                        while ((line = reader.readLine()) != null) {
                                sb.append(line + "n");
                        }
                } catch (IOException e) {
                        e.printStackTrace();
                } finally {
                        try {
                                is.close();
                        } catch (IOException e) {
                                e.printStackTrace();
                        }
                }
 
                return sb.toString();
        }
 
        public boolean isAuthenticated() {
                return isAuthenticated;
        }
}
Parsed in 0.047 seconds,  using GeSHi 1.0.8.4

haden · by **haden** » Tue Dec 16, 2008 12:54 pm

Thanks buddy.. was looking for this..

wescorp · by **wescorp** » Thu Feb 05, 2009 6:37 pm

Thanks a lot for this. It is working well for me also.

I was generating a warning from this line
BufferedReader reader = new BufferedReader(new InputStreamReader(is));

and replaced it with

BufferedReader reader = new BufferedReader(new InputStreamReader(is), 8*1024);

and the warning went away so all is well.

northvortex · by **northvortex** » Sat Feb 07, 2009 4:14 am

I also added code to define a connection time-out.

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Using java Syntax Highlighting

HttpParams params = new BasicHttpParams();                      
params.setIntParameter(CoreConnectionPNames.SO_TIMEOUT, 5000);
params.setIntParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 10000);
 
this.httppost.setParams(params);
Parsed in 0.030 seconds,  using GeSHi 1.0.8.4

more information:

Interface CoreConnectionPNames
http://hc.apache.org/httpcomponents-cor ... Names.html

E-Nature · by **E-Nature** » Sat Mar 06, 2010 8:20 pm

I have a question. is go() supposed to return what the PHP file is outputting?
I can send data via POST to the PHP file but the Java method does not receive back the return value from the PHP file (just an empty string)

thank you for elaboration.

Http POST SDK 1.0

Http POST SDK 1.0

Time-out

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