node.js+Android http請求響應

上次做了一個demo，試驗如何用node.js響應get post請求，http請求使用的浏覽器。我現在正在學Android，所以決定寫一個兩者結合的demo。node.js做服務端接收get post請求，android做客戶端發送get post請求。

相關閱讀：

http://www.linuxidc.com/Linux/2012-02/53536.htm 與 http://www.linuxidc.com/Linux/2012-02/53537.htm

先上node.js的代碼（保存為example6.js）：

1. var http = require('http');  
2. var server = http.createServer();  
3. var querystring = require('querystring');  
4.   
5.   
6. var postResponse = function(req, res) {  
7.     var info ='';  
8.     req.addListener('data', function(chunk){  
9.         info += chunk;  
10.      })  
11.     .addListener('end', function(){  
12.         info = querystring.parse(info);  
13.         res.setHeader('content-type','text/html; charset=UTF-8');//響應編碼   
14.         res.end('Hello World POST ' + info.name,'utf8');  
15.      })  
16. }  
17.   
18. var getResponse = function (req, res){  
19.   res.writeHead(200, {'Content-Type': 'text/plain'});  
20.   var name = require('url').parse(req.url,true).query.name  
21.   res.end('Hello World GET ' + name,'utf8');  
22. }  
23.   
24. var requestFunction = function (req, res){  
25.     req.setEncoding('utf8');//請求編碼   
26.   
27.     if (req.method == 'POST'){  
28.         return postResponse(req, res);  
29.     }  
30.   
31.     return getResponse(req, res);  
32. }  
33.   
34. server.on('request',requestFunction);  
35. server.listen(8080, "192.168.9.194");  
36.   
37. console.log('Server running at http://192.168.9.194:8080/');  

再上android源代碼：

layout main,xml如下

1. <?xml version="1.0" encoding="utf-8"?>  
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
3.     android:layout_width="fill_parent"  
4.     android:layout_height="fill_parent"  
5.     android:orientation="vertical" >  
6.   
7.     <TextView  
8.         android:id="@+id/textView1"  
9.         android:layout_width="wrap_content"  
10.         android:layout_height="wrap_content"/>  
11.       
12.     <LinearLayout  
13.         android:layout_width="match_parent"  
14.         android:layout_height="wrap_content" >  
15.   
16.         <Button  
17.             android:layout_width="wrap_content"  
18.             android:layout_height="wrap_content"  
19.             android:text="java get"   
20.             android:onClick="javaGet"/>  
21.   
22.         <Button  
23.             android:layout_width="wrap_content"  
24.             android:layout_height="wrap_content"  
25.             android:text="java post"   
26.             android:onClick="javaPost"/>  
27.     </LinearLayout>   
28.       
29.     <LinearLayout  
30.         android:layout_width="match_parent"  
31.         android:layout_height="wrap_content" >  
32.   
33.         <Button  
34.             android:layout_width="wrap_content"  
35.             android:layout_height="wrap_content"  
36.             android:text="apache get"   
37.             android:onClick="apacheGet"/>  
38.   
39.         <Button  
40.             android:layout_width="wrap_content"  
41.             android:layout_height="wrap_content"  
42.             android:text="apache post"   
43.             android:onClick="apachePost"/>  
44.     </LinearLayout>  
45. </LinearLayout>  

1. <uses-permission android:name="android.permission.INTERNET"/>  

[java]

1. package com.zhang.test08_01;  
2.   
3. import java.io.BufferedInputStream;  
4. import java.io.BufferedOutputStream;  
5. import java.io.BufferedReader;  
6. import java.io.IOException;  
7. import java.io.InputStream;  
8. import java.io.InputStreamReader;  
9. import java.io.OutputStream;  
10. import java.io.OutputStreamWriter;  
11. import java.io.UnsupportedEncodingException;  
12. import java.io.Writer;  
13. import java.net.HttpURLConnection;  
14. import java.net.MalformedURLException;  
15. import java.net.ProtocolException;  
16. import java.net.URL;  
17. import java.net.URLEncoder;  
18. import java.util.ArrayList;  
19. import java.util.List;  
20.   
21. import org.apache.http.HttpEntity;  
22. import org.apache.http.HttpResponse;  
23. import org.apache.http.NameValuePair;  
24. import org.apache.http.ParseException;  
25. import org.apache.http.client.ClientProtocolException;  
26. import org.apache.http.client.HttpClient;  
27. import org.apache.http.client.entity.UrlEncodedFormEntity;  
28. import org.apache.http.client.methods.HttpGet;  
29. import org.apache.http.client.methods.HttpPost;  
30. import org.apache.http.client.methods.HttpUriRequest;  
31. import org.apache.http.impl.client.DefaultHttpClient;  
32. import org.apache.http.message.BasicNameValuePair;  
33. import org.apache.http.protocol.HTTP;  
34. import org.apache.http.util.EntityUtils;  
35.   
36. import android.app.Activity;  
37. import android.os.Bundle;  
38. import android.view.View;  
39. import android.widget.TextView;  
40.   
41. public class Test08_01Activity extends Activity {  
42.       
43.     private TextView textView1;  
44.       
45.     // You can't use localhost; localhost is the (emulated) phone. You need    
46.     //to specify the IP address or DNS name of the actual web server.    
47.     private static final String TEST_URL = "http://192.168.9.194:8080/";  
48.       
49.     @Override  
50.     public void onCreate(Bundle savedInstanceState) {  
51.         super.onCreate(savedInstanceState);  
52.         setContentView(R.layout.main);  
53.           
54.         textView1 = (TextView)findViewById(R.id.textView1);  
55.     }  
56.       
57.     public void javaGet(View v) {  
58.         String str = "";  
59.         try {  
60.             str = URLEncoder.encode("抓哇", "UTF-8");  
61.         } catch (UnsupportedEncodingException e) {  
62.         }  
63.         URL url = null;  
64.         try {  
65.             url = new URL(TEST_URL + "?name=javaGet"+str);  
66.         } catch (MalformedURLException e) {  
67.         }  
68.           
69.         HttpURLConnection urlConnection = null;  
70.         try {  
71.             urlConnection = (HttpURLConnection) url.openConnection();  
72.         } catch (IOException e) {  
73.             textView1.setText(e.getMessage());  
74.             return;  
75.         }  
76.         //method  The default value is "GET".   
77.           
78.         getResponseJava(urlConnection);  
79.     }  
80.   
81.     public void javaPost(View v) {  
82.         URL url = null;  
83.         try {  
84.             url = new URL(TEST_URL);  
85.         } catch (MalformedURLException e) {  
86.         }  
87.           
88.         HttpURLConnection urlConnection = null;  
89.         try {  
90.             urlConnection = (HttpURLConnection) url.openConnection();  
91.         } catch (IOException e) {  
92.             textView1.setText(e.getMessage());  
93.             return;  
94.         }  
95.         try {  
96.             urlConnection.setRequestMethod("POST");  
97.         } catch (ProtocolException e) {  
98.         }  
99.         urlConnection.setDoOutput(true);  
100.         urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  
101.           
102.         OutputStream out = null;  
103.         try {  
104.             out = new BufferedOutputStream(urlConnection.getOutputStream());//請求   
105.         } catch (IOException e) {  
106.             urlConnection.disconnect();  
107.             textView1.setText(e.getMessage());  
108.             return;  
109.         }  
110.           
111.         String str = "";  
112.         try {  
113.             str = URLEncoder.encode("抓哇", "UTF-8");  
114.         } catch (UnsupportedEncodingException e) {  
115.         }  
116.         Writer writer = null;  
117.         try {  
118.             writer = new OutputStreamWriter(out,"UTF-8");  
119.         } catch (UnsupportedEncodingException e1) {  
120.         }  
121.         try {  
122.             writer.write("name=javaPost"+str);  
123.         } catch (IOException e) {  
124.             urlConnection.disconnect();  
125.             textView1.setText(e.getMessage());  
126.             return;  
127.         } finally{  
128.             try {  
129.                 writer.flush();  
130.                 writer.close();  
131.             } catch (IOException e) {  
132.             }  
133.         }  
134.           
135.         getResponseJava(urlConnection);  
136.     }  
137.       
138.       
139.     public void apacheGet(View v) {  
140.         HttpGet request = new HttpGet(TEST_URL + "?name=apacheGet阿帕奇");  
141.         getResponseApache(request);  
142.     }  
143.       
144.     public void apachePost(View v) {  
145.         HttpPost request = new HttpPost(TEST_URL);  
146.           
147.         List<NameValuePair> params = new ArrayList<NameValuePair>(1);  
148.         params.add(new BasicNameValuePair("name", "apachePost阿帕奇"));  
149.         HttpEntity formEntity = null;  
150.         try {  
151.             formEntity = new UrlEncodedFormEntity(params,HTTP.UTF_8);  
152.         } catch (UnsupportedEncodingException e) {  
153.         }  
154.         request.setEntity(formEntity);  
155.           
156.         getResponseApache(request);  
157.     }  
158.       
159.       
160.     private void getResponseJava(HttpURLConnection urlConnection) {  
161.         InputStream in = null;  
162.         try {  
163.             in = new BufferedInputStream(urlConnection.getInputStream());//響應   
164.         } catch (IOException e) {  
165.             urlConnection.disconnect();           
166.             textView1.setText(e.getMessage());  
167.             return;  
168.         }  
169.           
170.         BufferedReader reader = null;  
171.         try {  
172.             reader = new BufferedReader(new InputStreamReader(in,"UTF-8"));  
173.         } catch (UnsupportedEncodingException e1) {  
174.         }  
175.         StringBuilder result = new StringBuilder();  
176.         String tmp = null;  
177.         try {  
178.             while((tmp = reader.readLine()) != null){  
179.                 result.append(tmp);  
180.             }  
181.         } catch (IOException e) {  
182.             textView1.setText(e.getMessage());  
183.             return;  
184.         } finally {  
185.             try {  
186.                 reader.close();  
187.                 urlConnection.disconnect();  
188.             } catch (IOException e) {  
189.             }  
190.         }  
191.         textView1.setText(result);  
192.     }  
193.       
194.     private void getResponseApache(HttpUriRequest request) {  
195.         HttpClient client = new DefaultHttpClient();  
196.         HttpResponse response = null;  
197.         try {  
198.             response = client.execute(request);  
199.         } catch (ClientProtocolException e) {  
200.             textView1.setText(e.getMessage());  
201.         } catch (IOException e) {  
202.             textView1.setText(e.getMessage());  
203.         }  
204.           
205.         if (response == null) {  
206.             return;  
207.         }  
208.           
209.         String result = null;  
210.         if (response.getStatusLine().getStatusCode() == 200) {  
211.             try {  
212.                 result = EntityUtils.toString(response.getEntity(),"UTF-8");  
213.             } catch (ParseException e) {  
214.                 result = e.getMessage();  
215.             } catch (IOException e) {  
216.                 result = e.getMessage();  
217.             }  
218.         } else {  
219.             result = "error response" + response.getStatusLine().toString();  
220.         }  
221.         textView1.setText(result);  
222.     }  
223. }