//
// The value of the cookie itself.

private String name; // NAME= ... "$Name" style is reserved
private String value; // value of NAME
// Attributes encoded in the header's cookie fields.
private String comment; // ;Comment=VALUE ... describes cookie's use
// ;Discard ... implied by maxAge < 0
private String domain; // ;Domain=VALUE ... domain that sees cookie
private int maxAge = -1; // ;Max-Age=VALUE ... cookies auto-expire
private String path; // ;Path=VALUE ... URLs that see the cookie
private boolean secure; // ;Secure ... e.g. use SSL
private int version = 0; // ;Version=1 ... means RFC 2109++ style
private boolean isHttpOnly = false;

通過 ResponseCookie 給客戶端設置Cookie

本質(zhì)上，Cookie也只是一個header。我們可以不使用Cookie對象，而通過自定義Header的方式來給客戶端設置Cookie。

ResponseCookie 是Spring定義的一個Cookie構建工具類，極其簡單

import java.time.Duration;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.http.HttpHeaders;
import org.springframework.http.ResponseCookie;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping
public class TestController {
	
	@GetMapping("/test")
	public Object test (HttpServletRequest request,
					HttpServletResponse response) throws Exception {
		
		ResponseCookie cookie = ResponseCookie.from("myCookie", "myCookieValue") // key & value
				.httpOnly(true)		// 禁止js讀取
				.secure(false)		// 在http下也傳輸
				.domain("localhost")// 域名
				.path("/")			// path
				.maxAge(Duration.ofHours(1))	// 1個小時候過期
				.sameSite("Lax")	// 大多數(shù)情況也是不發(fā)送第三方 Cookie，但是導航到目標網(wǎng)址的 Get 請求除外
				.build()
				;
		
		// 設置Cookie Header
		response.setHeader(HttpHeaders.SET_COOKIE, cookie.toString());
		
		return "ok";
	}
}

響應給客戶端的Cookie

所有屬性都響應正確 √

HttpSession Cookie 的SameSite屬性

HttpSession依賴一個名稱叫做JSESSIONID（默認名稱）的Cookie。

對于JSESSIONID Cookie 的設置，可以修改如下配置。但是，目前spring也沒實現(xiàn)SameSite的配置項。

配置類： org.springframework.boot.web.servlet.server.Cookie

server.servlet.session.cookie.comment
server.servlet.session.cookie.domain
server.servlet.session.cookie.http-only
server.servlet.session.cookie.max-age
server.servlet.session.cookie.name
server.servlet.session.cookie.path
server.servlet.session.cookie.secure

通過修改容器的配置，對Session Cookie設置SameSite屬性

import org.apache.tomcat.util.http.Rfc6265CookieProcessor;
import org.apache.tomcat.util.http.SameSiteCookies;
import org.springframework.boot.web.embedded.tomcat.TomcatContextCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class TomcatConfiguration {
	@Bean
	public TomcatContextCustomizer sameSiteCookiesConfig() {
		return context -> {
			final Rfc6265CookieProcessor cookieProcessor = new Rfc6265CookieProcessor();
			// 設置Cookie的SameSite
			cookieProcessor.setSameSiteCookies(SameSiteCookies.LAX.getValue());
			context.setCookieProcessor(cookieProcessor);
		};
	}
}

Spring Session的SameSite屬性

通過自定義 CookieSerializer 設置 SameSite屬性

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.session.web.http.CookieSerializer;

import com.video.common.spring.session.DynamicCookieMaxAgeCookieSerializer;
@Configuration
public class SpringSessionConfiguration {
	
	@Bean
	public CookieSerializer cookieSerializer() {
		DynamicCookieMaxAgeCookieSerializer serializer = new DynamicCookieMaxAgeCookieSerializer();
		serializer.setCookieName("JSESSIONID");
		serializer.setDomainName("localhost");
		serializer.setCookiePath("/");
		serializer.setCookieMaxAge(3600);
		serializer.setSameSite("Lax");  // 設置SameSite屬性
		serializer.setUseHttpOnlyCookie(true);
		serializer.setUseSecureCookie(false);
		return serializer;
	}
}

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