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);
}
};
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() {
HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BASIC);
MarvelSigningInterceptor signingInterceptor = new MarvelSigningInterceptor(
BuildConfig.MARVEL_PUBLIC_KEY, BuildConfig.MARVEL_PRIVATE_KEY);
OkHttpClient client = new OkHttpClient.Builder()
.addInterceptor(signingInterceptor)
.addInterceptor(loggingInterceptor)
.build();
Gson customGsonInstance = new GsonBuilder()
.registerTypeAdapter(new TypeToken<List<AvengersCharacter>>() {
}.getType(),
new MarvelResultsDeserializer<AvengersCharacter>())
.create();
Retrofit marvelApiAdapter = new Retrofit.Builder()
.baseUrl(MarvelService.END_POINT)
.addConverterFactory(GsonConverterFactory.create(customGsonInstance))
.addCallAdapterFactory(RxJavaCallAdapterFactory.create())
.client(client)
.build();
mMarvelService = marvelApiAdapter.create(MarvelService.class);
}
@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;
}
}