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scala - http4s 解压 gzipped http 响应

问题描述

我尝试在客户端解压缩 gzipped 的简单响应。使用 http4s 的合适方法是什么？

import cats.effect.{Blocker, ContextShift, IO, Timer}
import java.util.concurrent._
import org.http4s.{Header, Headers, HttpVersion, Method, Request}
import org.http4s.client.{Client, JavaNetClientBuilder}
import org.http4s.implicits._

import scala.concurrent.ExecutionContext.global
implicit val cs: ContextShift[IO] = IO.contextShift(global)
implicit val timer: Timer[IO] = IO.timer(global)

val blockingPool = Executors.newFixedThreadPool(5)
val blocker = Blocker.liftExecutorService(blockingPool)
val httpClient: Client[IO] = JavaNetClientBuilder[IO](blocker).create
val uriYandex = uri"https://ya.ru"

val lstHeader: List[Header] =List(
  Header("Accept","text/plain")
  ,Header("Accept-Charset","utf-8")
  ,Header("Accept-Encoding","*")
)

val request2 = Request[IO](Method.GET, uriYandex, HttpVersion.`HTTP/2.0`, Headers(lstHeader))
val httpReq = httpClient.expect[String](request2)
val app = httpReq.map(resString => resString)

app.unsafeRunSync

http4s 版本“0.21.3”如果我在 IDEA Scala 工作表中运行它。它工作正常并输出：

res0: String = <html class="i-ua_js_no i-ua_css_standart i-ua_browser_ i-ua_browser-engine_i

但是，如果我将 ,Header("Accept-Encoding","*") 更改为 ,Header("Accept-Encoding","gzip") 服务器返回我压缩的内容并输出：

res0: String = " ??????????|?r?H??P?320???,Y??+d[v{??????" ?????%??9?'&6&66f???????3 ?{????7?/?

我尝试了不同的解码器，但出现了以下错误：

失败（java.util.zip.ZipException：不是 GZIP 格式）

标签： scalahttpgziphttp4s

解决方案

谢谢大家。我在下次使用 GZip 时解决了我的问题。

import org.http4s.client.middleware.GZip
val gzClient = GZip()(httpClient)
val httpReq = gzClient.expect[String](request2)
val app = httpReq.map(resString => resString)

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