Scalatra，使用 Gzip 编码处理 POST 请求

Question

我有一个带有 POST 方法的 Scalatra API，该方法由发送 gzip 编码消息的外部 API 调用。但是我无法读取post请求的body，当我尝试读取POST的body或尝试解压时，出现异常：

MalformedInputException: Input length = 1.

如果我将传入的 POST 请求路由到 fiddler，fiddler 会正确处理消息并声明消息已编码，解码后，我可以在 body 中看到正确的消息请求

以下是我尝试过的方法：

val body = new GZIPInputStream(new ByteArrayInputStream(request.body.getBytes))

同样的异常被抛出：

logger.info(s"Response body..." + request.body )

我也尝试将 body 读取为 json，但它 returns JNothing:

logger.info(s"Response body...\n${parsedBody}" )

这里是 POST headers:

(Expect,100-continue)
(Connection,keep-alive)
(Content-Encoding,gzip)
(Content-Type,application/json)
(Content-Length,3500)

这里是栈道的一部分：

    Parsing the request body failed, because:
java.nio.charset.MalformedInputException: Input length = 1
        at java.nio.charset.CoderResult.throwException(Unknown Source) ~[na:1.8.0_45]
        at sun.nio.cs.StreamDecoder.implRead(Unknown Source) ~[na:1.8.0_45]
        at sun.nio.cs.StreamDecoder.read(Unknown Source) ~[na:1.8.0_45]
        at java.io.InputStreamReader.read(Unknown Source) ~[na:1.8.0_45]
        at java.io.BufferedReader.read1(Unknown Source) ~[na:1.8.0_45]
        at java.io.BufferedReader.read(Unknown Source) ~[na:1.8.0_45]
        at java.io.Reader.read(Unknown Source) ~[na:1.8.0_45]
        at scala.io.BufferedSource.mkString(BufferedSource.scala:96) ~[scala-library-2.11.6.jar:na]
        at org.scalatra.servlet.RichRequest$$anonfun$body.apply(RichRequest.scala:181) ~[scalatra_2.11-2.3.0.jar:2.3.0]
        at org.scalatra.servlet.RichRequest$$anonfun$body.apply(RichRequest.scala:176) ~[scalatra_2.11-2.3.0.jar:2.3.0]
        at scala.Option.getOrElse(Option.scala:121) [scala-library-2.11.6.jar:na]
        at org.scalatra.servlet.RichRequest.body(RichRequest.scala:176) ~[scalatra_2.11-2.3.0.jar:2.3.0]
        at org.scalatra.json.JsonSupport$class.parseRequestBody(JsonSupport.scala:29) [scalatra-json_2.11-2.3.0.jar:2.3.0]
        at impala.api.GreetingController.parseRequestBody(GreetingController.scala:13) [classes/:na]

Answer 1

可以在 scalatra 用户组中找到解决方案：

https://groups.google.com/forum/#!topic/scalatra-user/2vBBA2-CzDM

Scalatra，使用 Gzip 编码处理 POST 请求

Scalatra, Handling POST request with Gzip encoding

gzip

scala

content-encoding

http-post

scalatra