[android]-如何在向服务器发送request时附加已保存的cookie数据

[android]-如何在向服务器发送request时附加已保存的cookie数据

应用场景:
在开发android基于手机端+服务器端的应用时,登陆->获取用户信息->获取授权用户相关业务数据(如用户工作任务安排)
,此时就涉及到在登陆后必须把保存有用户已登陆的cookie数据(和服务器端使用cookie或session来判断用户是否登陆没关系,因为这两种方式,在客户端来说,都是通过保存cookie数据来实现的)一同发送到服务器端,不然,服务器端会认为你没有登陆,而不给提供用户工作任务安排的数据

我在工作中就遇到过这问题

一开始我是这样书写代码的

01	import java.io.IOException;

02	import java.net.SocketTimeoutException;

03	import java.util.ArrayList;

04	import java.util.List;

05	import org.apache.http.HttpResponse;

06	import org.apache.http.NameValuePair;

07	import org.apache.http.client.methods.HttpPost;

08	import org.apache.http.impl.client.AbstractHttpClient;

09	import org.apache.http.impl.client.DefaultHttpClient;

10

11

12	String result = "";

13	/* HTTP Post */

14	HttpPost httpRequest = new HttpPost(url);

15

16	List<NameValuePair> params = new ArrayList<NameValuePair>();

17	params.add(new BasicNameValuePair(para, data));// jsonParameter

18

19

try {

20	// HTTP request

21	httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));

22	// HTTP response

23

24	DefaultHttpClient defaultHttpClient = new DefaultHttpClient();

25

// 请求超时

26	defaultHttpClient.getParams().setParameter(

27	CoreConnectionPNames.CONNECTION_TIMEOUT, 10000);

28

// 读取超时

29	defaultHttpClient.getParams().setParameter(

30	CoreConnectionPNames.SO_TIMEOUT, 10000);

31

32

33

// 发送请求

34	HttpResponse httpResponse = defaultHttpClient.execute(httpRequest);

35

36	// 得到应答的字符串

37

// 200 ok

38	if (httpResponse.getStatusLine().getStatusCode() == 200) {

39	result = EntityUtils.toString(httpResponse.getEntity());

40

41

}

42	} catch (ClientProtocolException e) {

43	System.out.println("ClientProtocolException:" + e.toString());

44	e.printStackTrace();

45	return null;

46	} catch (UnsupportedEncodingException e) {

47	System.out.println("UnsupportedEncodingException:" + e.toString());

48	e.printStackTrace();

49	} catch (SocketTimeoutException e) {

50	System.out.println("SocketTimeoutException:" + e.toString());

51	e.printStackTrace();

52	} catch (IOException e) {

53	System.out.println("IOException:" + e.toString());

54	e.printStackTrace();

55

}

调用发现登陆成功后在获取工作任务时服务器提示未登陆,看来是没把cookie发送到服务器,由是找资料

修改后如下,有两个类
WebHelperResponse.java

1	package com.demo.utils;

2

3	public class WebHelperResponse {

4	public String ResponseText = "";

5	public boolean IsOk = false;

6	public boolean IsError = false;

7	public String ErrMsg = "";

8

}

WebHelper.java

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001	package com.nt.android.app.slorders.utils;

002

003	import java.io.IOException;

004	import java.net.SocketTimeoutException;

005	import java.util.ArrayList;

006	import java.util.List;

007	import org.apache.http.HttpResponse;

008	import org.apache.http.NameValuePair;

009	import org.apache.http.client.CookieStore;

010	import org.apache.http.client.entity.UrlEncodedFormEntity;

011	import org.apache.http.client.methods.HttpPost;

012	import org.apache.http.impl.client.AbstractHttpClient;

013	import org.apache.http.impl.client.DefaultHttpClient;

014	import org.apache.http.message.BasicNameValuePair;

015	import org.apache.http.params.CoreConnectionPNames;

016	import org.apache.http.protocol.HTTP;

017	import org.apache.http.util.EntityUtils;

018

019	public class WebHelper {

020

021	private static CookieStore cookieStore;

022

023	public static WebHelperResponse postJson(String url, String data) {

024	return postData(url, data, "jsondata");

025

}

026

027	public static WebHelperResponse postXml(String url, String data) {

028	return postData(url, data, "xmldata");

029

}

030

031	// url参数中不允许有空格,否则将在new HttpPost(url)引发java.lang.IllegalArgumentException错误

032	public static WebHelperResponse postData(String url, String data,

033	String para) {

034	WebHelperResponse m_response = new WebHelperResponse();

035	m_response.IsOk = false;

036	m_response.IsError = false;

037

038	String result = "";

039	/* HTTP Post */

040	HttpPost httpRequest = new HttpPost(url);

041	// param NameValuePair[]

042	// request.getParameter("name")

043	List<NameValuePair> params = new ArrayList<NameValuePair>();

044	params.add(new BasicNameValuePair(para, data));// jsonParameter

045

046

try {

047	// HTTP request

048	httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));

049	// HTTP response

050

051	DefaultHttpClient defaultHttpClient = new DefaultHttpClient();

052

// 请求超时

053	defaultHttpClient.getParams().setParameter(

054	CoreConnectionPNames.CONNECTION_TIMEOUT, 10000);

055

// 读取超时

056	defaultHttpClient.getParams().setParameter(

057	CoreConnectionPNames.SO_TIMEOUT, 10000);

058	// 添加Cookie

059	if (cookieStore != null) {

060	defaultHttpClient.setCookieStore(cookieStore);

061

}

062

063

// 发送请求

064	HttpResponse httpResponse = defaultHttpClient.execute(httpRequest);

065	int responseStatusCode = httpResponse.getStatusLine()

066	.getStatusCode();

067	System.out.println("response statuscode:" + responseStatusCode);

068	// 得到应答的字符串

069

// 200 ok

070	if (responseStatusCode == 200) {

071	result = EntityUtils.toString(httpResponse.getEntity());

072	// 保存Cookie

073	cookieStore = ((AbstractHttpClient) defaultHttpClient)

074	.getCookieStore();

075

076	m_response.IsError = false;

077	m_response.IsOk = true;

078	m_response.ResponseText = result;

079

080	} else if (responseStatusCode == 404) {

081

// 找不到页面

082	m_response.IsError = true;

083	m_response.IsOk = false;

084	System.out.println("404:page not found.");

085	m_response.ErrMsg = "不存在此服务,请检查服务器地址配置";

086

} else {

087	m_response.IsError = true;

088	m_response.IsOk = false;

089	System.out.println("error,responsestatuscode:"

090	+ responseStatusCode);

091	m_response.ErrMsg = "服务出错";

092

}

093	} catch (SocketTimeoutException e) {

094	System.out.println("ClientProtocolException:" + e.toString());

095	e.printStackTrace();

096

097	m_response.IsError = true;

098	m_response.IsOk = false;

099	m_response.ErrMsg = "连接错误:未能连接到服务器!";

100

101	} catch (IOException e) {

102	System.out.println("ClientProtocolException:" + e.toString());

103	e.printStackTrace();

104

105	m_response.IsError = true;

106	m_response.IsOk = false;

107	m_response.ErrMsg = "错误:服务器未能提供服务!";

108

109

}

110	return m_response;

111

}

112

113

}