OkHttp3--CookieJar 持久化Cookie

Okhttp3默認(rèn)是不持久化Cookie的，想要持久化Cookie就要實(shí)現(xiàn)CookieJar接口，并且設(shè)置他

OkHttpClient.Builder builder = new OkHttpClient.Builder();
builder.cookieJar(new PersistenceCookieJar());

簡單實(shí)現(xiàn)CookieJar接口

public class PersistenceCookieJar implements CookieJar {
            
            List<Cookie> cache = new ArrayList<>();
            
            //Http請求結(jié)束，Response中有Cookie時(shí)候回調(diào)
            @Override
            public void saveFromResponse(HttpUrl url, List<Cookie> cookies) {
                //內(nèi)存中緩存Cookie
                cache.addAll(cookies);
            }

            //Http發(fā)送請求前回調(diào)，Request中設(shè)置Cookie
            @Override
            public List<Cookie> loadForRequest(HttpUrl url) {
                //過期的Cookie
                List<Cookie> invalidCookies = new ArrayList<>();
                //有效的Cookie
                List<Cookie> validCookies = new ArrayList<>();
                
                for (Cookie cookie : cache) {
                    
                    if (cookie.expiresAt() < System.currentTimeMillis()) {
                        //判斷是否過期
                        invalidCookies.add(cookie);
                    } else if (cookie.matches(url)) {
                        //匹配Cookie對應(yīng)url
                        validCookies.add(cookie);
                    }
                }
                
                //緩存中移除過期的Cookie
                cache.removeAll(invalidCookies);
                
                //返回List<Cookie>讓Request進(jìn)行設(shè)置
                return validCookies;
            }
        };
}

上面代碼只是在運(yùn)行時(shí)緩存了Cookie，當(dāng)App退出的時(shí)候Cookie就不存在了。所以我們可以改進(jìn)一下添加在本地中緩存Cookie的功能

Cookie中數(shù)據(jù)如何緩存到本地？

我們先來看看Okhttp3的Cookie類

public final class Cookie {
    
    ......
    
    private final String name;
    private final String value;
    private final long expiresAt;
    private final String domain;
    private final String path;
    private final boolean secure;
    private final boolean httpOnly;
    private final boolean persistent; // True if 'expires' or 'max-age' is present.
    private final boolean hostOnly; // True unless 'domain' is present.
    
    ......
}

我們僅需緩存這些參數(shù)到本地就好了