返回确切的响应/标题? [英] Return exact response/header?
问题描述
在Web应用程序的客户端,我遇到了服务器端路由,该路由只是第三方API的包装.使用分派,我试图使服务器端请求返回 exact 标头和第三方API对客户端AJAX调用的响应.
From the client-side of a webapp, I hit a server-side route which is just a wrapper for a third-party API. Using dispatch, I am trying to make that server-side request return the exact header and response of the third-party API to the client-side AJAX call.
当我这样做时:
val req = host("third-pary.api.com, 80)
val post = req.as("user", "pass") / "route" << Map("key" -> "akey", "val" -> "aval")
Http(post > as.String)
我总是看到对AJAX调用返回的200
响应(按预期的那样).我已经看到使用了Either
语法,但实际上我更像是Any
,因为它只是确切的响应和标头.怎么写?
I always see a 200
response returned to the AJAX call (kind of expectedly). I have seen an Either
syntax used, but I'm really more of an Any
, as it's just the exact response and header. How would this be written?
我应该提到我在服务器端使用Scalatra,因此本地路由为:
I should mention I'm using Scalatra on the server-side, so the local route is:
post("/route") {
}
这是我正在使用的建议的任何一个匹配示例,但是match
语法没有意义-我不在乎是否有错误,我只想返回它.另外,我似乎无法通过此方法返回BODY.
Here is the suggested Either matching example, which I'm playing with, but the match
syntax doesn't make sense - I don't care if there is an error, I just want to return it. Also, I can't seem to get the BODY returned with this method.
val asHeaders = as.Response { response =>
println("BODY: " + response.getResponseBody())
scala.collection.JavaConverters.mapAsScalaMapConverter(
response.getHeaders).asScala.toMap.mapValues(_.asScala.toList)
}
val response: Either[Throwable, Map[String, List[String]]] =
Http(post > asHeaders).either()
response match {
case Left(wrong) =>
println("Left: " + wrong.getMessage())
// return Action with header + body
case Right(good) =>
println("Right: " + good)
// return Action with header + body
}
理想情况下,解决方案返回Scalatra ActionResult(responseStatus(status, reason), body, headers)
.
Ideally, the solutions returns the Scalatra ActionResult(responseStatus(status, reason), body, headers)
.
推荐答案
使用Dispatch时,获取响应标头实际上非常容易.例如0.9.4:
It's actually very easy to get response headers while using Dispatch. For example with 0.9.4:
import dispatch._
import scala.collection.JavaConverters._
val headers: java.util.Map[String, java.util.List[String]] = Http(
url("http://www.google.com")
)().getHeaders
现在,例如:
scala> headers.asScala.mapValues(_.asScala).foreach {
| case (k, v) => println(k + ": " + v)
| }
X-Frame-Options: Buffer(SAMEORIGIN)
Transfer-Encoding: Buffer(chunked)
Date: Buffer(Fri, 30 Nov 2012 20:42:45 GMT)
...
如果经常这样做,最好将其封装起来,例如:
If you do this often it's better to encapsulate it, like this, for example:
val asHeaders = as.Response { response =>
scala.collection.JavaConverters.mapAsScalaMapConverter(
response.getHeaders
).asScala.toMap.mapValues(_.asScala.toList)
}
现在您可以编写以下内容:
Now you can write the following:
val response: Either[Throwable, Map[String, List[String]]] =
Http(url("http://www.google.com") OK asHeaders).either()
您将进行错误检查,漂亮的不可变集合等.
And you've got error checking, nice immutable collections, etc.
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