根据标题获得网站的总Cookie大小 [英] Get the total cookie size of a website given its header

问题描述

我的问题很简单，我必须获取Cookie的总大小(按字节计).我使用了Http标头，并将其称为set-cookie元素:

My problem is simple, I have to get the total cookie size (by bytes). I used the Http Header and called the set-cookie element:

public static String getCookiesField(URLConnection connection){
    return connection.getHeaderField("Set-Cookie"); // it can return null
}

我得到的字段结果为:

dwsid = H-GOhXnQOVZU1SKVvlnOMJOYZq5CNAs9AUYMWArBVV00TnFO3a8VgoaUtl6wpJqgKWkidqt-y1ihDRm9yo3a7g ==;路径=/; HttpOnly

dwsid=H-GOhXnQOVZU1SKVvlnOMJOYZq5CNAs9AUYMWArBVV00TnFO3a8VgoaUtl6wpJqgKWkidqt-y1ihDRm9yo3a7g==; path=/; HttpOnly

我不知道这是什么意思，但我需要按字节获取cookie的大小.

I don't know what it mean but I need to get the size of the cookie by bytes.

推荐答案

在Cookie的字符串上调用getBytes().

Call getBytes() on the string of the cookie.

如果不确定Cookie是什么，请

If you're unsure what the cookie is, mdn can help you; the syntax can be lots of different things, like

Set-Cookie: <cookie-name>=<cookie-value>; HttpOnly; Path=<path-value>
// or 
Set-Cookie: sessionid=38afes7a8; httponly; Path=/

getHeaderField 方法返回cookie的String(标题中Set-Cookie字段的值).

The getHeaderField method returns a String of the cookie (the value for the field Set-Cookie in the Header).

byte的大小由myBytes.length计算(没有()).

The size of the bytes are calculated by myBytes.length (no ()).

因此，您可以像这样获取Cookie的大小:

So you can get the size of the cookie like this:

String setCookieField = connection.getHeaderField("Set-Cookie");
// check that cookie is not null
String[] cookieFields = cookie.split(";");
// the cookie name/value pair is typically first
String[] cookieNameValue = cookieFields[0].split("=");
String cookie = cookieNameValue[1];
int size = cookie.getBytes("UTF-8").length;

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