Cookie簡(jiǎn)介
Cookie一般用于后臺(tái)和客戶端數(shù)據(jù)訪問的有效保證冠王，由服務(wù)端創(chuàng)建剪个，客戶端保存，客戶端訪問時(shí)將Cookie保存在請(qǐng)求數(shù)據(jù)header里面版确，服務(wù)端收到訪問請(qǐng)求后，解析出header的庫(kù)乎折，對(duì)本次請(qǐng)求進(jìn)行有效的驗(yàn)證
Android端整體流程是這樣的绒疗，先獲取當(dāng)前請(qǐng)求的 Cookie , 然后進(jìn)行本地持久化存儲(chǔ)。判斷當(dāng)前是否拿到Cookie, 或者本地是否存有 Cookie , 添加到請(qǐng)求頭中骂澄，完成操作
移動(dòng)端網(wǎng)絡(luò)庫(kù)一般都是用Retrofit庫(kù)吓蘑，Retrofit是對(duì)Okhttp的一次很完美的封裝，并且可以自定義Okhttp，我們這里使用的方法就是利用攔截器磨镶，攔截每一次請(qǐng)求與訪問溃蔫，解析收到的數(shù)據(jù)，拿到header里面的Cookie琳猫，在把Cookie封裝到每一幀的請(qǐng)求里面去
方法一：
//第一步
//接收攔截器 獲取Cookie
public class ReceivedCookiesInterceptor implements Interceptor {
@Override
public Response intercept(Interceptor.Chain chain) throws IOException {
Response originalResponse = chain.proceed(chain.request());
if (!originalResponse.headers("Set-Cookie").isEmpty()) {
//解析Cookie
for (String header : originalResponse.headers("Set-Cookie")) {
if(header.contains("JSESSIONID")){
NetClient.COOKIE = header.substring(header.indexOf("JSESSIONID"),
header.indexOf(";"));
}
}
}
return originalResponse;
}
}
//第二步
//發(fā)送攔截器 添加Cookie到請(qǐng)求頭
public class AddCookiesInterceptor implements Interceptor {
@Override
public Response intercept(Chain chain) throws IOException {
final Request.Builder builder = chain.request().newBuilder();
//添加Cookie
if(!TextUtils.isEmpty(NetClient.COOKIE)){
builder.addHeader("Cookie", NetClient.COOKIE);
}
return chain.proceed(builder.build());
}
}
//第三步 OkHttpClient.Builder添加上面的兩個(gè)攔截器
static OkHttpClient getClient() {
OkHttpClient.Builder okBuilder = (new OkHttpClient.Builder()).connectTimeout(5L, TimeUnit.SECONDS);
okBuilder.addInterceptor(new AddCookiesInterceptor());
okBuilder.addInterceptor(new ReceivedCookiesInterceptor());
return okBuilder.build();
}
//第四步 Retrofit 初始化中加入 client 配置：
mRetrofit = new Retrofit.Builder()
.baseUrl("https://www.wanandroid.com/")
.client(client)
.addConverterFactory(GsonConverterFactory.create())
.addCallAdapterFactory(RxJavaCallAdapterFactory.create())
.build();
方法二：
跟方法一樣的,不同寫法伟叛。
static OkHttpClient getClient() {
OkHttpClient.Builder client = new OkHttpClient().newBuilder();
client.interceptors().add(new Interceptor() {
@NotNull
@Override
public Response intercept(Chain chain) throws IOException {
// 獲取 Cookie
Response resp = chain.proceed(chain.request());
List<String> cookies = resp.headers("Set-Cookie");
StringBuilder cookieStr = new StringBuilder();
if (cookies != null && cookies.size() > 0) {
for (int i = 0; i < cookies.size(); i++) {
cookieStr.append(cookies.get(i));
}
Log.d("TAG", "獲取 Cookie: "+cookieStr);
// UserUtil.saveUserCookieId(cookieStr);
}
return resp;
}
});
client.interceptors().add(new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
// 設(shè)置 Cookie
String cookieStr = UserUtil.getCookieId();
if (EmptyUtil.StringNotEmpty(cookieStr)) {
return chain.proceed(chain.request().newBuilder().header("Cookie", cookieStr).build());
}
return chain.proceed(chain.request());
}
});
client.connectTimeout(5L, TimeUnit.MILLISECONDS);
// client.writeTimeout(TIMOUT, TimeUnit.MILLISECONDS);
// client.readTimeout(TIMOUT, TimeUnit.MILLISECONDS);
return client.build();
}
參考文章：
https://blog.csdn.net/jackzhouyu/article/details/79500148
https://blog.csdn.net/lv_fq/article/details/77132273
