如何指定Get-Request编码(reverfit+OkHttp)

Question

val gson = GsonBuilder()
        .setDateFormat("d.M.yyyy")
        .create()

val client = OkHttpClient.Builder()
        .build()

val retrofit = Retrofit.Builder()
        .baseUrl(RestService.BASE_URL)
        .client(client)
        .addConverterFactory(GsonConverterFactory.create(gson))
        .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
        .build()

val rest = retrofit.create(RestService::class.java)

编辑：最终解决方案

class EncodingInterceptor : Interceptor {

    override fun intercept(chain: Interceptor.Chain): Response {
        val response = chain.proceed(chain.request())
        val mediaType = MediaType.parse("application/json; charset=iso-8859-1")
        val modifiedBody = ResponseBody.create(mediaType, response.body().bytes())
        val modifiedResponse = response.newBuilder()
                .body(modifiedBody)
                .build()

        return modifiedResponse
    }
}

Answer 1

这样做的一种方法是构建一个拦截器，它接受响应并设置适当的内容类型，如下所示：

class ResponseInterceptor : Interceptor {
    override fun intercept(chain: Interceptor.Chain): Response {
        val response = chain.proceed(chain.request())
        val modified = response.newBuilder()
                .addHeader("Content-Type", "application/json; charset=utf-8")
                .build()

        return modified
    }
}

您可以将其添加到OkHttp客户端,如下所示：

val client = OkHttpClient.Builder()
        .addInterceptor(ResponseInterceptor())
        .build()

您应该确保只对没有指定编码的API使用这个OKHttpClient，或者让拦截器只为适当的endpoint添加头，以避免覆盖来自其他endpoint的有效内容类型头。