get Http Header Response - Android Network

Android examples for Network:HTTP Response

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  4. HTTP Response

Description

get Http Header Response

Demo Code


//package com.java2s;

import java.net.HttpURLConnection;
import java.net.URL;

import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

public class Main {

    public static HashMap<String, String> getHttpHeaderResponse(String url) {
        HashMap<String, String> result = new HashMap<String, String>();
        URL urlO = null;// w w w .  j  av a2  s. co m
        HttpURLConnection http = null;
        try {
            urlO = new URL(url);
            http = (HttpURLConnection) urlO.openConnection();
            http.addRequestProperty("Cache-Control", "no-cache");
            http.addRequestProperty("Connection", "keep-alive");
            http.setConnectTimeout(5 * 1000);
            http.setReadTimeout(10 * 1000);
            http.connect();
            int code = http.getResponseCode();
            if (code == HttpURLConnection.HTTP_OK) {
                Map<String, List<String>> responseHeader = http
                        .getHeaderFields();
                Set<String> keySet = responseHeader.keySet();
                Iterator<String> iterator = keySet.iterator();
                while (iterator.hasNext()) {
                    String key = (String) iterator.next();
                    if (null != key) {
                        List<String> valueList = responseHeader.get(key);
                        for (String value : valueList) {
                            result.put(key, value);
                        }
                    }
                }
            }
        } catch (Exception e) {
            System.err.println(e);
        } finally {
            if (null != http) {
                http.disconnect();
            }
        }
        return result;
    }

    public static String getHttpHeaderResponse(String url, String headerName) {
        String result = null;
        URL urlO = null;
        HttpURLConnection http = null;
        try {
            urlO = new URL(url);
            http = (HttpURLConnection) urlO.openConnection();
            http.addRequestProperty("Cache-Control", "no-cache");
            http.addRequestProperty("Connection", "keep-alive");
            http.setConnectTimeout(5 * 1000);
            http.setReadTimeout(10 * 1000);
            http.connect();
            int code = http.getResponseCode();
            if (code == HttpURLConnection.HTTP_OK) {
                Map<String, List<String>> responseHeader = http
                        .getHeaderFields();
                Set<String> keySet = responseHeader.keySet();
                Iterator<String> iterator = keySet.iterator();
                while (iterator.hasNext()) {
                    String key = (String) iterator.next();
                    if (null != key && key.trim().length() > 0) {
                        if (headerName.equals(key)) {
                            List<String> valueList = responseHeader
                                    .get(key);
                            for (String value : valueList) {
                                result = value;
                                break;
                            }
                        }
                    }
                }
            }
        } catch (Exception e) {
            System.err.println(e);
        } finally {
            if (null != http) {
                http.disconnect();
            }
        }
        return result;
    }
}

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