Java - HttpUrlConnection 每次都返回缓存的响应
2022-09-02 22:16:05
我试图从Roblox的货币兑换中收集统计数据进行分析。因此,我需要最新的数据,而不是缓存的结果。但是,似乎无论我做什么,结果仍然被缓存。似乎最直观的选项 ,没有效果,并且手动设置标头似乎也不起作用。我使用Fiddler2检查了Cache标头,发现它的值为,但它似乎也没有改变程序的行为。以下是相关的代码段:setUseCaches()
Cache-Control: no-cache
Cache-Control: max-age=0
网址:
private final static String URL = "http://www.roblox.com/my/money.aspx#/#TradeCurrency_tab";
获取请求:
URLConnection socket = new URL( URL ).openConnection( );
socket.setUseCaches( false );
socket.setDefaultUseCaches( false );
HttpURLConnection conn = ( HttpURLConnection )socket;
conn.setUseCaches( false );
conn.setDefaultUseCaches( false );
conn.setRequestProperty( "Pragma", "no-cache" );
conn.setRequestProperty( "Expires", "0" );
conn.setRequestProperty( "Cookie", ".ROBLOSECURITY=" + ROBLOSECURITY );
conn.setRequestProperty( "Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8" );
conn.setRequestProperty( "Accept-Language", "en-US,en;q=0.8" );
conn.setRequestProperty( "User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36" );
conn.setDoInput( true );
conn.setRequestMethod( "GET" );
conn.connect();
Scanner data = new Scanner( conn.getInputStream() );
data.useDelimiter( "\\A" );
String result = data.next();
data.close( );
conn.disconnect();
注意,每次重新启动程序时,它都会返回唯一结果,但在程序运行时不会返回唯一结果,这可能很重要,也可能不重要。
更新:
Wireshark分析(自上次以来,我对代码进行了一些调整):
GET /my/money.aspx HTTP/1.1
Pragma: no-cache
Expires: 0
Cookie: .ROBLOSECURITY=_|WARNING:-DO-NOT-SHARE-THIS.--Sharing-this-will-allow-someone-to-log-in-as-you-and-to-steal-your-ROBUX-and-items.|*sensitive*
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.8
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36
Cache-Control: no-cache
Host: www.roblox.com
Connection: keep-alive
HTTP/1.1 200 OK
Cache-Control: private, s-maxage=0
Content-Type: text/html; charset=utf-8
Set-Cookie: rbx-ip=; domain=roblox.com; path=/; HttpOnly
Set-Cookie: RBXSource=rbx_acquisition_time=1/4/2016 12:45:21 AM&rbx_acquisition_referrer=&rbx_medium=Direct&rbx_source=&rbx_campaign=&rbx_adgroup=&rbx_keyword=&rbx_matchtype=&rbx_send_info=0; domain=roblox.com; expires=Wed, 03-Feb-2016 06:45:21 GMT; path=/
Access-Control-Allow-Credentials: true
Set-Cookie: rbx-ip=; domain=roblox.com; path=/; HttpOnly
Set-Cookie: RBXSource=rbx_acquisition_time=1/4/2016 12:45:21 AM&rbx_acquisition_referrer=&rbx_medium=Direct&rbx_source=&rbx_campaign=&rbx_adgroup=&rbx_keyword=&rbx_matchtype=&rbx_send_info=1; domain=roblox.com; expires=Wed, 03-Feb-2016 06:45:21 GMT; path=/
Set-Cookie: RBXEventTrackerV2=CreateDate=1/4/2016 12:45:21 AM&rbxid=59210735&browserid=3940274345; domain=roblox.com; expires=Fri, 22-May-2043 05:45:21 GMT; path=/
Set-Cookie: GuestData=UserID=-856460986; domain=.roblox.com; expires=Fri, 22-May-2043 05:45:21 GMT; path=/
P3P: CP="CAO DSP COR CURa ADMa DEVa OUR IND PHY ONL UNI COM NAV INT DEM PRE"
Date: Mon, 04 Jan 2016 06:45:20 GMT
Content-Length: 153751