Question

我一直在努力让WS向json api发出请求。到目前为止，我无法正确呈现utf-8，在此处记录：Play Framework WS losing unicode chars from external api

我现在正在尝试将charset添加到请求的http标头中。但是，我似乎无法做到这一点。如果我运行以下内容：

val request = ws.url("http://myserver.org")
request.withHttpHeaders("charset" -> "utf-8")
println("request headers: " request.headers)

request.get().map { response =>
  println("response headers: " + response.headers)
...

这将生成以下内容：

request headers: Map()
response headers: Map(Date -> Buffer(Tue, 07 Nov 2017 20:11:58 GMT), Server -> Buffer(Jetty(8.1.5.v20120716)), Content-Type -> Buffer(application/json), Cache-Control -> Buffer(private, must-revalidate, max-age=0), Content-Length -> Buffer(9822), X-Content-Type-Options -> Buffer(nosniff))

任何人都可以诊断出我做错了什么吗？为什么请求标题映射为空？我遵循了2.6 scala doc

的约定

Answer 1

这很简单。

方法withHttpHeaders会返回您刚刚丢弃的新request。

尝试更改您的代码：

val request = ws.url("http://myserver.org").withHttpHeaders("charset" -> "utf-8")

Answer 2

使用Play框架的version = 2.8.1：

必要进口：

import play.api._
import play.api.mvc._
import play.api.http.HttpEntity

带有请求标头的示例方法：

  def index() = Action { implicit request: Request[AnyContent] => {
    val (status, message) = report.renderReportsJson

    // Adding headers for dev testing
    if (status) {
      Result(
        header = ResponseHeader(200, Map("Access-Control-Allow-Origin" -> "*")),
        body = HttpEntity.Strict(ByteString(message), Some("text/plain"))
      )
    }
    else
      {
        Result(
          header = ResponseHeader(501, Map("Access-Control-Allow-Origin" -> "*")),
          body = HttpEntity.Strict(ByteString(message), Some("text/plain"))
        )
      }
  }

Play Framework将标头添加到http请求

2 个答案: