Lift REST 服务无法识别 PUT 请求
我正在 Scala 中使用 Lift Web 框架实现 REST 服务，但我在 PUT 请求方面遇到了一些问题创建一个我知道其 ID 的新实体。
已经将调度添加到 Boot.scala 中，我的其余服务对象看起来有点像这样：
package code
package lib
import model._
import net.liftweb._
import common._
import http._
import rest._
import util._
import Helpers._
import json._
object RestService extends RestHelper {
serve( "api" / "room" prefix {
// /api/room returns all the rooms
case Nil JsonGet _ => Room.registredRooms: JValue
// /api/room/count gets the room count
case "count" :: Nil JsonGet _ => JInt(Room.registredRooms.length)
// /api/room/room_id gets the specified room (or a 404)
case Room(room) :: Nil JsonGet _ => room: JValue
// DELETE the room in question
case Room(room) :: Nil JsonDelete _ =>
Room.delete(room.id).map(a => a: JValue)
// PUT adds the room if the JSON is parsable
case Nil JsonPut Room(room) -> _ => Room.add(room): JValue
// POST if we find the room, merge the fields from the
// the POST body and update the room
case Room(room) :: Nil JsonPost json -> _ =>
Room(mergeJson(room, json)).map(Room.add(_): JValue)
})
}
GET 请求在我测试时正常工作：
$ curl http://localhost:8080/api/room/abs
{
"id":"abs"
}
我现在正在尝试实现创建服务，并且不断收到PUT 时未找到 404：
$ curl -i -H "Accept: application/json" -X PUT -d "[{'id':'abs'}]" http://localhost:8080/api/room/
HTTP/1.1 404 Not Found
Expires: Sun, 4 Sep 2011 14:13:50 UTC
Set-Cookie: JSESSIONID=t1miz05pd5k9;Path=/
Content-Length: 106
Cache-Control: no-cache, private, no-store
Content-Type: text/html; charset=utf-8
Pragma: no-cache
Date: Sun, 4 Sep 2011 14:13:50 UTC
X-Lift-Version: 2.4-M3
Server: Jetty(6.1.22)
<!DOCTYPE html>
<html> <body>The Requested URL /api/room/ was not found on this server</body> </html>
在 SBT 上，我可以看到该请求被识别为 PUT 请求：
15:13:50.130 [414557038@qtp-135607724-2 - /api/room/] INFO net.liftweb.util.TimeHelpers - Service request (PUT) /api/room/ returned 404, took 10 Milliseconds
对可能出现的问题有什么想法吗？
I'm implementing a REST service with the Lift web framework in Scala and I'm having some issues with the PUT request to create a new entity for which I know the ID.
Already added the dispatch to Boot.scala and my rest service object looks a bit like this:
package code
package lib
import model._
import net.liftweb._
import common._
import http._
import rest._
import util._
import Helpers._
import json._
object RestService extends RestHelper {
serve( "api" / "room" prefix {
// /api/room returns all the rooms
case Nil JsonGet _ => Room.registredRooms: JValue
// /api/room/count gets the room count
case "count" :: Nil JsonGet _ => JInt(Room.registredRooms.length)
// /api/room/room_id gets the specified room (or a 404)
case Room(room) :: Nil JsonGet _ => room: JValue
// DELETE the room in question
case Room(room) :: Nil JsonDelete _ =>
Room.delete(room.id).map(a => a: JValue)
// PUT adds the room if the JSON is parsable
case Nil JsonPut Room(room) -> _ => Room.add(room): JValue
// POST if we find the room, merge the fields from the
// the POST body and update the room
case Room(room) :: Nil JsonPost json -> _ =>
Room(mergeJson(room, json)).map(Room.add(_): JValue)
})
}
GET requests are working properly as I tested with:
$ curl http://localhost:8080/api/room/abs
{
"id":"abs"
}
I am now trying to implement the create service and I keep getting a 404 not found when I PUT:
$ curl -i -H "Accept: application/json" -X PUT -d "[{'id':'abs'}]" http://localhost:8080/api/room/
HTTP/1.1 404 Not Found
Expires: Sun, 4 Sep 2011 14:13:50 UTC
Set-Cookie: JSESSIONID=t1miz05pd5k9;Path=/
Content-Length: 106
Cache-Control: no-cache, private, no-store
Content-Type: text/html; charset=utf-8
Pragma: no-cache
Date: Sun, 4 Sep 2011 14:13:50 UTC
X-Lift-Version: 2.4-M3
Server: Jetty(6.1.22)
<!DOCTYPE html>
<html> <body>The Requested URL /api/room/ was not found on this server</body> </html>
On SBT I can see that the request is being recognized as a PUT request:
15:13:50.130 [414557038@qtp-135607724-2 - /api/room/] INFO net.liftweb.util.TimeHelpers - Service request (PUT) /api/room/ returned 404, took 10 Milliseconds
Any ideas on what might be wrong?
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您测试
PUT请求的方式存在三个问题。最重要的是，您需要将
Content-Type标头设置为application/json（代替或补充Accept标头）。接下来，您需要在 JSON 中使用双引号：
-d '[{"id":"abs"}]'。 （实际上，有效 JSON 中的字符串需要双引号。一些 JSON 解析器会接受单引号，但 Lift 不会。）最后，从 URL 中删除尾部斜杠。它将
"index"添加到路径列表的末尾，这意味着您不会在case Nil JsonPut...行中获得匹配项。以下应该有效：
There are three problems with the way you're testing the
PUTrequest.Most importantly, you need to set the
Content-Typeheader toapplication/json(instead of or in addition to theAcceptheader).Next, you need to use double quotation marks in your JSON:
-d '[{"id":"abs"}]'. (Double quotation marks are actually required for strings in valid JSON. Some JSON parsers will accept single quotation marks, but not Lift's.)Finally, remove the trailing slash from the URL. It's adding
"index"to the end of the path list, which means you won't get a match in yourcase Nil JsonPut...line.The following should work: