Scala Next play Framework learning Note (manipulating Results)

Change the default content type

Depending on the Scala value specified in the response body, the content type of the result can be inferred automatically, for example:

val textResult = Ok("Hello World!")

This will automatically set the Content-type's head totext/plain,同时：

val xmlResult = Ok(<message>Hello World!</message>)

This will set the head toapplication/xml

Above throughplay.api.http.ContentTypeOf这个类来实现。用as(newContentType)可以强制转换header的content type，

val htmlResult = Ok(

Or as follows:

val htmlResult2 = Ok(

UseHTML类型，头部会被自动设置成text/html; charset=utf-8。

You can add an HTTP header to the result:

val result = Ok("Hello World!").withHeaders(
  CACHE_CONTROL -> "max-age=3600",

ETAG, "xx")

Cookies are a special form of HTTP headers that make it easier to use a series of helper classes. Add cookies to the HTTP response:

val result = Ok("Hello world").withCookies(

Cookies ("Theme", "Blue"))

Discard cookies stored by the browser:

val result2 = result.discardingCookies(DiscardingCookie("theme"))

The two can also be mixed:

val result3 = result.withCookies(Cookie("theme", "blue")).discardingCookies(DiscardingCookie("skin"))

Change the character set of the HTTP response of a text type

HTTP response is used by defaultutf-8

The character set is not only used to convert text responses into corresponding byte streams for network transmission, but also with ";charset=xxx"来更新content-type头部。

Passplay.api.mvc.Codec这个类，字符集被自动处理。在当前范围内，导入play.api.mvc.Codec这个隐式类可以更改字符集，用以下的方式操作：

class Application extends Controller {

  implicit val myCustomCharset = Codec.javaSupported("iso-8859-1")

  def index = Action {
    Ok(  }



}

About the definition of HTML:

def HTML(implicit codec: Codec) = {
  "text/html; charset=" + codec.charset

}




Scala Next play Framework learning Note (manipulating Results)