android - 删除 Android 中特定改造请求的 header

Question

设置这种拦截器后是否有办法删除特定 header :

public class AuthInterceptor : Interceptor {
    override fun intercept(chain: Interceptor.Chain): Response {
        val original: Request = chain.request()
        val request: Request = original.newBuilder()
            .addHeader(AppConstant.HEADER_APP_TOKEN, AppConfig.apptoken) //<-- need to remove this one for only one request
            .addHeader(AppConstant.HEADER_SECURITY_TOKEN, AppConfig.security_token)
            .method(original.method(), original.body())
            .build()
        return chain.proceed(request)

这是我的 Retrofit 实例:

object RetrofitClientInstance {

    private val httpClient = OkHttpClient.Builder()
        .addInterceptor(AuthInterceptor())
        .addInterceptor(HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.HEADERS))

    private val retrofit = Retrofit.Builder()
        .baseUrl(AppConstant.SERVER_BETA)
        .addConverterFactory(GsonConverterFactory.create())
        .client(httpClient.build())
        .build()

    fun <T> getRetrofitInstance(service: Class<T>): T {
        return retrofit.create(service)
    }
}

这是我的 API 服务:

interface ApiService {
    @GET("/app/shoes")
    fun getShoes() : Call<Shoes>
}

感谢您的帮助:)

Answer 1

反之亦然。向 API 调用添加 header ，指示是否添加 auth header 。像这样:

interface ApiService {
    @Headers("isAuthorizable: false")
    @GET("/app/Socks")
    fun getShoes() : Call<Socks>

    @GET("/app/shoes")
    fun getShoes() : Call<Shoes>

    @GET("/app/sandals")
    fun getShoes() : Call<Sandals>
}

检查 Interceptor 中的 header ，如果满足条件则添加 header 。像这样:

public class AuthInterceptor : Interceptor {
    override fun intercept(chain: Interceptor.Chain): Response {
        val original: Request = chain.request()

        val shouldAddAuthHeaders = original.headers["isAuthorizable"] != "false"
        
        val requestBuilder = request
            .newBuilder()
            .method(request.method, request.body)
            .removeHeader("isAuthorizable")
        
        if (shouldAddAuthHeaders) {
            requestBuilder.addHeader(AppConstant.HEADER_APP_TOKEN, AppConfig.apptoken)
                    .addHeader(AppConstant.HEADER_SECURITY_TOKEN, AppConfig.security_token)
        }

        return chain.proceed(requestBuilder.build())
    }
}

注意:使用相同的逻辑，可以指定要为其添加身份验证 header 的请求，而不是过滤掉不需要身份验证的请求。也就是说，

interface ApiService {
    @GET("/app/Socks")
    fun getShoes() : Call<Socks>


    @Headers("isAuthorizable: true")
    @GET("/app/shoes")
    fun getShoes() : Call<Shoes>

    @Headers("isAuthorizable: true")
    @GET("/app/sandals")
    fun getShoes() : Call<Sandals>
}

public class AuthInterceptor : Interceptor {
    override fun intercept(chain: Interceptor.Chain): Response {
        val original: Request = chain.request()

        val shouldAddAuthHeaders = original.headers["isAuthorizable"] == "true"
        
        val requestBuilder = request
            .newBuilder()
            .method(request.method, request.body)
            .removeHeader("isAuthorizable")
        
        if (shouldAddAuthHeaders) {
            requestBuilder.addHeader(AppConstant.HEADER_APP_TOKEN, AppConfig.apptoken)
                    .addHeader(AppConstant.HEADER_SECURITY_TOKEN, AppConfig.security_token)
        }

        return chain.proceed(requestBuilder.build())
    }
}