东大校园网很不好用，我在宿舍连着网。当我出去自习的时候，也想用网，就连不上。
因为东大校园网只允许一个人使用，这使得想合伙共用一个账号的人就没法整了。学校这么做多半是为了多挣点钱，这对于一个月只用2,3G的人是一种剥削。既然制度不对，为什么不改呢？
于是只能先断开一下，在重新登陆校园网了。可是坑爹的问题又出现了，有三个按钮：连接，断开连接，断开全部连接。
我点了“断开网络”，然后再“连接网络”，它还告诉我：当前连接数大于一。
实际上，只有一个管用：应该点“断开全部连接”，再点“连接网络”。
那么就得分析一下为啥会有这种逗比的情况：编这个页面的人多半是同情贫苦大众的，他以为学校肯定会开明到允许多个学生共用一个账号（然而他高估了学校），这样一来，中间那个按钮就起作用了，那个按钮就是为多个用户共用一个账号而生的。但是最终那个按钮没能派上用场，反倒成了累赘，总是误导人，不信可以统计一下，有多少人在一分钟之内先点了“断开连接”，然后又点了“断开全部连接”，这就说明又多少次点中间按钮是不管用的，是不符合人类需求的。学校既然狠心一人一个账号来剥削群众，为啥就不删除哪一个按钮呢？
连上了网，一下子还开了一个小窗口，为啥不把这个窗口所显示的信息跟页面合并呢。这就使得我被迫多移动一次鼠标去关它。
实际上，这个功能是后来添加的。http://jifei.neu.edu.cn/stats/dashboard?sid=12815848134566654这个链接里面的参数sid是随机生成的，发送到服务器上，服务器完成查询之后，将流量信息保存到一个hash表中，键是这个随机数，值是流量使用情况。所以这个是实现是有可能出bug的，就是可能撞车，张三和李四同时登陆校园网，可能张三看到的流量信息是李四的。
如果用linux登陆校园网，可以用下面这个脚本,把用户名和密码改一下就可以了。#!/bin/bash
#use 'ping' to check whether you are connected to NEU
ping -c2 'www.neu.edu.cn' || { echo "You should connect to NEU firstly" ;exit 0 ; }
user='xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
password='xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
temp=`mktemp`
#disconnect all the connections
curl -d "uid=$user&password=$password&range=2&timeout=1&operation=disconnectall" "http://ipgw.neu.edu.cn/ipgw/ipgw.ipgw" -o $temp
iconv -f "gb2312" -t "utf-8" $temp -o $temp
cat $temp | grep '<td>.*</td>'
#if ask connect,connect it
if test $# -eq 0;then
curl -d "uid=$user&password=$password&range=2&timeout=1&operation=connect" "http://ipgw.neu.edu.cn/ipgw/ipgw.ipgw" -o $temp
iconv -f "gb2312" -t "utf-8" $temp -o $temp
cat $temp | grep '<td>.*</td>'
fi
#output how much energy did you use .
curl -d "uid=$user&password=$password" "http://jifei.neu.edu.cn/stats/dashboard?sid=0" -o $temp
curl "http://jifei.neu.edu.cn/stats/dashboard?sid=0" -o $temp
res=`cat $temp | grep '<li>.*MB</li>'`
res=${res//[<li>,</li>]/}
echo "$res"
还可以用一个网页打开，原理是用js向服务器post表单，自动登陆。
<html>
<script>
var name='stu_20124003';
var password="xxxxxxxxxxxxxxxxxxxxxxxxxxx";
var user="uid="+name+"&password="+password;
var data=user+"&range=2&timeout=1&";
var x="http://ipgw.neu.edu.cn/ipgw/ipgw.ipgw";
var y= "http://jifei.neu.edu.cn/stats/dashboard?sid=0";
function post(url,data){
var q=new XMLHttpRequest();
q.open("post",url);
q.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
q.send(data);
}
post(x,encodeURI(data+"operation=disconnectall"));
post(x,encodeURI(data+"operation=connect"));
post(y,encodeURI(user));
location=y;
</script>
</ht
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.Scanner;
public class URLConnectionPost {
static void post(String url, String data) {
try {
URLConnection connection = new URL(url).openConnection();
connection.setDoOutput(true);
connection.setRequestProperty("content-type", "application/x-www-form-urlencoded");
OutputStream cout = connection.getOutputStream();
cout.write(data.getBytes());
cout.close();
connection.getInputStream();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
String name = "stu_20124003", password = "xxxxxxxxxxxxx";
String user = "uid=" + name + "&password=" + password, data = user + "&range=2&timeout=1&";
String x = "http://ipgw.neu.edu.cn/ipgw/ipgw.ipgw", y = "http://jifei.neu.edu.cn/stats/dashboard?sid=0";
post(x, data + "operation=disconnectall");
post(x, data + "operation=connect");
post(y, user);
try {
Scanner cin = new Scanner(new URL(y).openConnection().getInputStream());
while(cin.hasNext()){
System.out.println(cin.nextLine());
}
cin.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
在连接校园网之前程序会点击“断开全部连接”，然后再点击“连接”。所以只要连着校园网，一旦打开这个网页就肯定登陆了。
public class Main {
static String tos(InputStream cin) {
Scanner in = new Scanner(cin);
String ans = "";
while (in.hasNext()) {
ans += in.nextLine() + "
";
}
in.close();
return ans;
}
static InputStream post(String url, String data) {
try {
URLConnection connection = new URL(url).openConnection();
connection.setDoOutput(true);
connection.setRequestProperty("content-type",
"application/x-www-form-urlencoded");
OutputStream cout = connection.getOutputStream();
cout.write(data.getBytes());
cout.close();
return connection.getInputStream();
} catch (Exception e) {
System.out.println("没连校园网");
// e.printStackTrace();
}
return null;
}
public static void main(String[] args) {
String name = "stu_20124003", password = "xxxxxxxxx";
String user = "username=" + name + "&password=" + password;
String base = "http://ipgw.neu.edu.cn:803/";
String logout = base + "include/auth_action.php";
String login = base + "srun_portal_pc.php?ac_id=1&";
post(logout, user + "&action=logout&ajax=1");
post(login, user + "&action=login&ac_id=1");
InputStream cin = post(logout, "action=get_online_info");
String s[] = tos(cin).split(",");
System.out.println("已用流量："
+ new DecimalFormat("#,###").format(Long.parseLong(s[0])));
long time = Long.parseLong(s[1]);
System.out.println("登录时间：" + String.format("%02d:%02d:%02d", time / 3600,
(time / 60) % 60, time % 60));
System.out.println("账户余额：" + s[2]);
System.out.println("IP地址：" + s[5]);
}
}
顺道学学python
from urllib.request import Request, urlopen
def post(url, data, doCallback):
req = Request(url)
fd = urlopen(req, data.encode(encoding='utf_8'))
if(doCallback):
return fd.read().decode("utf_8")
name = "stu_20124003"
password = "xxxxxxxx"
user = "username=" + name + "&password=" + password
base = "http://ipgw.neu.edu.cn:803/";
logout = base + "include/auth_action.php";
login = base + "srun_portal_pc.php?ac_id=1&";
post(logout, user + "&action=logout&ajax=1", False)
post(login, user + "&action=login&ac_id=1", False);
ans = post(logout, "action=get_online_info", True)
value = ans.split(sep=',')
def formatFlux(s):
ans = ""
danwei = "B,K,M,G".split(",")
i=len(danwei)-1
while i>=0:
if i*3<=len(s):
ans+=s[max(len(s)-i*3-3,0):len(s)-i*3]+danwei[i]+' '
i=i-1
return ans
print("已用流量：" + formatFlux(value[0]))
t = int(value[1])
print("登录时间：%02d:%02d:%02d" % (t / 3600, (t / 60) % 60, t % 60))
print ("账户余额：" + value[2])
print("IP地址：" + value[5])
javascript也好用，不过是setHeader几下罢了。
<html>
<h1 id='haha'></h1>
<script>
var name = 'stu_20124003';
var password = "xxxxxxxxx";
var user = "username=" + name + "&password=" + password;
function post(url, data, doCallback) {
var q = new XMLHttpRequest();
q.open("post", url);
q.setRequestHeader('Referer', 'http://ipgw.neu.edu.cn:803');
q.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
q.setRequestHeader("Origin","http://ipgw.neu.edu.cn:804");
if (doCallback) {
q.onreadystatechange = function(q) {
if (q.readyState == 4 && q.status == 200) {
document.getElementById('haha').innerHtml = q.responseText;
}
};
}
q.send(data);
}
var base = "http://ipgw.neu.edu.cn:803/";
var logout = base + "include/auth_action.php";
var login = base + "srun_portal_pc.php?ac_id=1&";
post(logout, user + "&action=logout&ajax=1", false);
post(login, user + "&action=login&ac_id=1", false);
post(logout, "action=get_online_info", true);
</script>
</html>
林教主发现,断开连接时还需要post用户名,无需post正确的密码,后台没有对密码进行检测是否正确.于是,林教主把全校人的校园网断开了一遍.
现在我来北航了,北航校园网1G只要5毛钱,允许多人同时在线,节假日免费,每月初赠送1G,登录页面还算漂亮.总而言之,北航校园网比东北大学建设的好多了.
public class Main { static boolean post(String url, String data) throws IOException { URLConnection connection = new URL(url).openConnection(); connection.setDoOutput(true); OutputStream cout = connection.getOutputStream(); cout.write(data.getBytes()); cout.close(); StringBuilder builder = new StringBuilder(); Scanner cin = new Scanner(connection.getInputStream()); while (cin.hasNext()) { builder.append(cin.nextLine()); } cin.close(); return builder.toString().contains("login_ok"); } public static void main(String[] args) throws IOException { String username = "xxxxx", password = "xxxxx"; while (false == post( "https://gw.buaa.edu.cn:802/include/auth_action.php", "action=login&username=" + username + "&password={B}" + Base64.getEncoder() .encodeToString(password.getBytes()) + "&save_me=1&ajax=1&ac_id=4")); } }
用python的requests库实现起来更简单
import requests import base64 username = "xxxx" password = "xxxx" def go(action="login"): resp = requests.post("https://gw.buaa.edu.cn:802/include/auth_action.php", data={ "action": action, "username": username, "password": "{B}" + base64.encodebytes(password.encode("utf8")).decode("utf8"), "save_me": 0, "ajax": 1, "ac_id": 22, }) resp.encoding = "utf8" print(resp.text) go("login")
手机端登录时,需要打开浏览器输入用户名密码,十分麻烦,所以编了一个android app,方便一键登录.本程序能自动打开wifi,链接校园网,然后点一下登录并退出就可以了.把用户名和密码存储在SharedPreference里面,因为android经验很少,特此记录.
Main.java:本程序唯一的Activity
public class Main extends Activity implements View.OnClickListener { Button loginButton, exitButton; EditText username, password; TextView info; Handler handler = new Handler(); SharedPreferences sharedPreferences; Semaphore semaphore = new Semaphore(1); Runnable runnable = new Runnable() { long lastLoginTime = 0; @Override public void run() { try { semaphore.acquire(); } catch (InterruptedException e) { e.printStackTrace(); } if (System.currentTimeMillis() - lastLoginTime < 3000) { return; } else { lastLoginTime = System.currentTimeMillis(); login(username.getText().toString(), password.getText().toString()); } semaphore.release(); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); loginButton = (Button) findViewById(R.id.login); exitButton = (Button) findViewById(R.id.exit); username = (EditText) findViewById(R.id.username); password = (EditText) findViewById(R.id.password); info = (TextView) findViewById(R.id.info); loginButton.setOnClickListener(this); exitButton.setOnClickListener(this); init(); username.setText(sharedPreferences.getString("username", "")); password.setText(sharedPreferences.getString("password", "")); } void init() { WifiManager wifiManager = (WifiManager) this.getSystemService(Context.WIFI_SERVICE); wifiManager.setWifiEnabled(true); WifiConfiguration config = new WifiConfiguration(); config.SSID = ""BUAA-WiFi""; int netId = wifiManager.addNetwork(config); wifiManager.enableNetwork(netId, true); sharedPreferences = this.getSharedPreferences("wifi", 0); } @Override public void onClick(View v) { if (v == exitButton) { finish(); System.exit(0); } if (username.getText().length() == 0 || password.getText().length() == 0) { Toast.makeText(this, "please input username&password", Toast.LENGTH_LONG).show(); return; } if (semaphore.availablePermits() == 1) { new Thread(runnable).start(); } } boolean post(String url, String data) throws IOException { URLConnection connection = new URL(url).openConnection(); connection.setDoOutput(true); OutputStream cout = connection.getOutputStream(); cout.write(data.getBytes()); cout.close(); StringBuilder builder = new StringBuilder(); Scanner cin = new Scanner(connection.getInputStream()); while (cin.hasNext()) { builder.append(cin.nextLine()); } cin.close(); return builder.toString().contains("login_ok"); } void login(String username, String password) { try { int cnt = 2; while (cnt-- > 0 && !post( "https://gw.buaa.edu.cn:802/include/auth_action.php", "action=login&username=" + username + "&password={B}" + Base64.encodeToString(password.getBytes(), Base64.DEFAULT) + "&save_me=1&ajax=1&ac_id=4")) Thread.sleep(1000); if (cnt > 0) { sharedPreferences.edit().putString("username", Main.this.username.getText().toString()).putString("password", Main.this.password.getText().toString()).commit(); exitButton.callOnClick(); } else { handler.post(new Runnable() { @Override public void run() { Toast.makeText(Main.this, "login failed", Toast.LENGTH_LONG).show(); } }); } } catch (IOException e) { e.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); } } }
本程序布局文件:唯一的layout
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <EditText android:id="@+id/username" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="username" /> <EditText android:id="@+id/password" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="password" android:inputType="textPassword" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <Button android:id="@+id/exit" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="1" android:text="exit" /> <Button android:id="@+id/login" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="1" android:text="login&exit" /> </LinearLayout> <TextView android:id="@+id/info" android:layout_width="match_parent" android:layout_height="match_parent" /> </LinearLayout>
用网络请求的方式登录校园网有时无法成功,这是可以模拟浏览器,这样登录成功率百分之百,但是运行速度有些慢.下面代码用到HtmlUnit库.创建maven项目并添加HtmlUnit的依赖即可.
public class App { public static void main(String[] args) throws Exception { WebClient client = new WebClient(BrowserVersion.CHROME); HtmlPage page = client.getPage( "https://gw.buaa.edu.cn:802/beihanglogin.php?ac_id=22&url=http://gw.buaa.edu.cn:802/beihangview.php"); HtmlTextInput loginname = (HtmlTextInput) page.getElementById("loginname"); HtmlPasswordInput password = (HtmlPasswordInput) page.getElementById("password"); HtmlSubmitInput button = (HtmlSubmitInput) page.getElementById("button"); loginname.setValueAttribute("xxxxx"); password.setValueAttribute("xxxxx"); button.click(); client.close(); } }
带配置文件的登录，第一次登录时会提示输入用户名密码并保存到家目录下。
import base64
import requests
import warnings
import time
import os
import json
warnings.filterwarnings("ignore")
def login(username, password):
print(username,password)
resp = requests.post("https://gw.buaa.edu.cn:803/include/auth_action.php",
data={
"action": "login",
"username": username.lower(),
"password": "{B}" + base64.encodebytes(password.encode("utf8")).decode("utf8"),
"save_me": 0,
"ajax": 1,
"ac_id": 22
}, verify=0)
resp.encoding = "utf8"
if "login_ok" in resp.text:
return True
else:
return False
filename = os.path.join(os.path.expanduser("~"), '.school-net.json')
if os.path.exists(filename):
config = json.load(open(filename,encoding='utf8'))
resp = login(config['username'], config['password'])
else:
while True:
username = input("please input username : ").strip()
if not username:
continue
password = input("please input password : ").strip()
if not password:
continue
if login(username, password):
break
else:
print("登录失败，可能是用户名密码错误")
config = dict(username=username, password=password)
json.dump(config, open(filename,mode="w"))
resp = True
if resp:
print("login ok")
else:
print("login failed")
time.sleep(2)