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在使用Retrofit时，有时候需要设置Set-Cookie等请求头，如果每一个url都需要，那么直接来个拦截器就好了。
官方说明：
- OkHttp3下OkHttpClient的 List< Interceptor> interceptors()方法，返回的是一个不可编辑的列表，如果对其进行编辑会报出UnSupportedOperationException
- Interceptor的典型使用场景，就是对request和response的Headers进行编辑
如下图所示：
注意Header头，不要照抄，要灵活运用。
让所有网络请求都附上你的 token：
Interceptor mTokenInterceptor = new Interceptor() { @Override public Response intercept(Chain chain) throws IOException { Request originalRequest = chain.request(); if (Your.sToken == null || alreadyHasAuthorizationHeader(originalRequest)) { return chain.proceed(originalRequest); } Request authorised = originalRequest.newBuilder() .header("Authorization", Your.sToken) .build(); return chain.proceed(authorised); }};
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为OkHttpClient 添加两个以上的拦截器，如下代码所示：
public class RestDataSource implements Repository { private final MarvelService mMarvelService; @Inject public RestDataSource() { // Log信息 HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor(); loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BASIC); // 公私密匙 MarvelSigningInterceptor signingInterceptor = new MarvelSigningInterceptor( BuildConfig.MARVEL_PUBLIC_KEY, BuildConfig.MARVEL_PRIVATE_KEY); // OkHttp3.0的使用方式 OkHttpClient client = new OkHttpClient.Builder() .addInterceptor(signingInterceptor) .addInterceptor(loggingInterceptor) .build(); // 选择人物信息 Gson customGsonInstance = new GsonBuilder() .registerTypeAdapter(new TypeToken<List<AvengersCharacter>>() { }.getType(), new MarvelResultsDeserializer<AvengersCharacter>()) .create(); // 适配器 Retrofit marvelApiAdapter = new Retrofit.Builder() .baseUrl(MarvelService.END_POINT) .addConverterFactory(GsonConverterFactory.create(customGsonInstance)) .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) .client(client) .build(); // 服务 mMarvelService = marvelApiAdapter.create(MarvelService.class); } // 返回人物信息 @Override public Observable<List<AvengersCharacter>> getCharacters(int currentOffset) { return mMarvelService.getCharacters(currentOffset); }}
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下面来个完整的配置：
import okhttp3.Interceptor;import okhttp3.OkHttpClient;import okhttp3.Request;import okhttp3.Response;import retrofit2.Retrofit;public class RetrofitAPIManager { public static final String SERVER_URL = "url"; public static ClientAPI provideClientApi() { Retrofit retrofit = new Retrofit.Builder() .baseUrl(SERVER_URL) .client(genericClient()) .build(); return retrofit.create(ClientAPI.class); } public static OkHttpClient genericClient() { OkHttpClient httpClient = new OkHttpClient.Builder() .addInterceptor(new Interceptor() { @Override public Response intercept(Chain chain) throws IOException { Request request = chain.request() .newBuilder() .addHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8") .addHeader("Accept-Encoding", "gzip, deflate") .addHeader("Connection", "keep-alive") .addHeader("Accept", "*/*") .addHeader("Cookie", "add cookies here") .build(); return chain.proceed(request); } }) .build(); return httpClient; }}
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给我老师的人工智能教程打call！http://blog.csdn.net/jiangjunshow
