I am using Intellij Idea + Scala Plugin + Play framework 2.6.0 to do web development.
I have a FruitController, its definition is:
def saveFruit = Action(BodyParsers.parse.json) { request =>
import FruitImplicits._
val fruitResult = request.body.validate[Fruit]
fruitResult.fold(
errors => {
BadRequest(Json.obj("status" -> "KO", "message" -> JsError.toJson(errors)))
},
fruit => {
println(s"Fruit is saved, the result is :$fruit")
Ok(Json.obj("status" -> "OK", "message" -> ("Fruit '" + fruit.name + "' saved.")))
}
)
}
The Intellij idea complains Missing parameter type:request for the request in the first line: Action(BodyParsers.parse.json) { request =>
But I could run the code successfully, so Intellij Idea has been mistakenly reported the error, I would ask how to get Intellij Idea to work well for this code
When I explicitly specify the type of the request: Request[JsValue], the problem is gone:
def saveFruit = Action(parse.json) { request: Request[JsValue] =>
Related
I have a GET request with parameters and a formField.
It works when I use a client like Insomnia/Postman to send the req.
But the route test below fails with the error:
UnsupportedRequestContentTypeRejection(Set(application/x-www-form-urlencoded, multipart/form-data))
(Rejection created by unmarshallers. Signals that the request was rejected because the requests content-type is unsupported.)
I have tried everything I can think of to fix it but it still returns the same error.
It is the formField that causes the problem, for some reason when called by the test it doesnt like the headers.
Is it something to do with withEntity ?
Code:
path("myurl" ) {
get {
extractRequest { request =>
parameters('var1.as[String], 'var2.as[String], 'var3.as[String], 'var4.as[String]) { (var1, var2, var3, var4) =>
formField('sessionid.as[String]) { (sessionid) =>
complete {
request.headers.foreach(a => println("h=" + a))
}
}
}
}
}
}
Test:
// TESTED WITH THIS - Fails with UnsupportedRequestContentTypeRejection(Set(application/x-www-form-urlencoded, multipart/form-data))
class GETTest extends FreeSpec with Matchers with ScalatestRouteTest {
val get = HttpRequest(HttpMethods.GET, uri = "/myurl?var1=456&var2=123&var3=789&var4=987")
.withEntity("sessionid:1234567890")
.withHeaders(
scala.collection.immutable.Seq(
RawHeader("Content-Type", "application/x-www-form-urlencoded"), // same problem if I comment out these 2 Content-Type lines
RawHeader("Content-Type", "multipart/form-data"),
RawHeader("Accept", "Application/JSON")
)
)
get ~> route ~> check {
status should equal(StatusCodes.OK)
}
The exception is thrown before the formField line.
Full exception:
ScalaTestFailureLocation: akka.http.scaladsl.testkit.RouteTest$$anonfun$check$1 at (RouteTest.scala:57)
org.scalatest.exceptions.TestFailedException: Request was rejected with rejection UnsupportedRequestContentTypeRejection(Set(application/x-www-form-urlencoded, multipart/form-data))
at akka.http.scaladsl.testkit.TestFrameworkInterface$Scalatest$class.failTest(TestFrameworkInterface.scala:24)
}
You could either use:
val get = HttpRequest(HttpMethods.GET, uri = "/myurl?var1=456&var2=123&var3=789&var4=987", entity = FormData("sessionid" -> "1234567.890").toEntity)
or
val get = Get("/myurl?var1=456&var2=123&var3=789&var4=987", FormData("sessionid" -> "1234567.890"))
I am new to Scala/Spray/AKKA so please excuse this dumb requests.
I have the following Directive and it is being called as the first
logger line ("inside") is showing up in logs.
However, anything inside mapRequest{} is skipped over. The logging line ("headers:") isn't showing up
private def directiveToGetHeaders(input: String) : Directive0 = {
logger.info("inside")
mapRequest { request =>
val headList: List[HttpHeader] = request.headers
logger.info("headers: " + headList.size)
request
}
}
I am not sure what I did wrong. My goal is to pull out all the HTTP headers. Any tip/pointer much appreciated. Thanks
-v
You can use extractRequest directive for getting headers.
private def directiveToGetHeaders(input: String) : Directive0 = {
logger.info("inside")
extractRequest { request =>
val headList: Seq[HttpHeader] = request.headers
logger.info("headers: " + headList.size)
complete(HttpResponse())
}
}
I'm working with Play Framework 2.4 on CentOS 6 and my application is throwing this exception:
java.net.SocketException: Too many open files
I've searched a lot of topics on Stack Overflow and tried the solutions:
Increase the number of open files to 65535;
Change hard and soft limits on /etc/security/limits.conf;
Change the value of fs.file-max on /etc/sysctl.conf;
Reduced the timeout on file /proc/sys/net/ipv4/tcp_fin_timeout;
The error keeps happening. On another sites, i've found people that are facing the same problem because they weren't calling the method close() from WSClient but in my case, i'm working with dependency injection:
#Singleton
class RabbitService #Inject()(ws:WSClient) {
def myFunction() {
ws.url(“url”).withHeaders(
"Content-type" -> "application/json",
"Authorization" -> ("Bearer " + authorization))
.post(message)
.map(r => {
r.status match {
case 201 => Logger.debug("It Rocks")
case _ => Logger.error(s"It sucks")
}
})
}
}
If i change my implementation to await the result, it work's like a charm but the performance is very poor - and i would like to use map function instead wait the result:
#Singleton
class RabbitService #Inject()(ws:WSClient) {
def myFunction() {
val response = ws.url("url")
.withHeaders(
"Content-type" -> "application/json",
"Authorization" -> ("Bearer " + authorization))
.post(message)
Try(Await.result(response, 1 seconds)) match {
case Success(r) =>
if(r.status == 201) {
Logger.debug(s"It rocks")
} else {
Logger.error(s"It sucks")
}
case Failure(e) => Logger.error(e.getMessage, e)
}
}
}
Anyone have an idea how can i fix this error? I've tried everything but without success.
If anyone is facing the same problem, you need to configure WSClient on application.conf - need to set maxConnectionsTotal and maxConnectionsPerHost.
This is how I solved this problem.
https://www.playframework.com/documentation/2.5.x/ScalaWS
I have a following Actor class that is responsible for sending a JSON message to a URL using POST.
import play.api.libs.ws._
class Worker extends Actor {
val logger: Logger = Logger("superman")
val supermanURL = "http://localhost:9000/superman/send"
def receive = {
case message: JsValue => {
val transactionID = (message \ "transactionID").get
println("Received JSON Object =>" + message)
val responseFromSuperman = WS.url(supermanURL).withHeaders("Content-Type" -> "application/json").post(message)
responseFromSuperman.map(
result => {
//TODO: Make sure to only log if response status is 200 OK
logger.info("""Message="ACK received from Superman" for transactionID=""" + transactionID)}
).recover { case error: Throwable =>
logger.error("""Message="NACK received from Superman" for transactionID=""" + transactionID) + " errorMessage:" + error.getLocalizedMessage()
}
}
}
}
So, if you look into my TODO above, I would like to add a check for a response type 200 OK. The current implementation is not doing that and it logs the message even if I manually send in a BadRequest. I tried checking for result.allHeaders which returns:
Map(Date -> Buffer(Wed, 27 Jan 2016 21:45:31 GMT), Content-Type -> Buffer(text/plain; charset=utf-8), Content-Length -> Buffer(7))
but no information about response status 200 OK
Simply:
import play.api.http.Status
if(result.status == Status.OK) {
// ...
}
Maybe I am missing here something but you have "status" on the response.
So you can do:
WS.url(url).withHeaders("Content-Type" -> "application/json").post(message).map{
case response if ( response.status == OK) => //DO SOMETHING?
}
The play example for using Oauth and Twitter is show below.
In the Play Framework I am still learning how to use redirects and routes. How would you set up the routes file and the Appliction.scala file to handle this redirect?
Redirect(routes.Application.index).withSession("token" -> t.token, "secret" -> t.secret)
Would the routes be something like this?
GET /index controllers.Application.index(String, String)
Link to Play Framework documentation with the example code http://www.playframework.com/documentation/2.0/ScalaOAuth
object Twitter extends Controller {
val KEY = ConsumerKey("xxxxx", "xxxxx")
val TWITTER = OAuth(ServiceInfo(
"https://api.twitter.com/oauth/request_token",
"https://api.twitter.com/oauth/access_token",
"https://api.twitter.com/oauth/authorize", KEY),
false)
def authenticate = Action { request =>
request.queryString.get("oauth_verifier").flatMap(_.headOption).map { verifier =>
val tokenPair = sessionTokenPair(request).get
// We got the verifier; now get the access token, store it and back to index
TWITTER.retrieveAccessToken(tokenPair, verifier) match {
case Right(t) => {
// We received the authorized tokens in the OAuth object - store it before we proceed
Redirect(routes.Application.index).withSession("token" -> t.token, "secret" -> t.secret)
}
case Left(e) => throw e
}
}.getOrElse(
TWITTER.retrieveRequestToken("http://localhost:9000/auth") match {
case Right(t) => {
// We received the unauthorized tokens in the OAuth object - store it before we proceed
Redirect(TWITTER.redirectUrl(t.token)).withSession("token" -> t.token, "secret" -> t.secret)
}
case Left(e) => throw e
})
}
def sessionTokenPair(implicit request: RequestHeader): Option[RequestToken] = {
for {
token <- request.session.get("token")
secret <- request.session.get("secret")
} yield {
RequestToken(token, secret)
}
}
}
It turned out that the reasons I had so many intermittent problems with routes and redirect was a combination of the versions of play, version of scala and the version of ScalaIDE for Eclipse. Using Play version 2.2.3, scala version 2.10.4 and ScalaIDE version 2.10.x solved the routes and redirect problems.
The following import statements are needed for the Twitter example.
import play.api.libs.oauth.ConsumerKey
import play.api.libs.oauth.ServiceInfo
import play.api.libs.oauth.OAuth
import play.api.libs.oauth.RequestToken
If your route is like this:
GET /index controllers.Application.index(param1:String, param2:String)
Then the reverse route would look like this:
routes.Application.index("p1", "p2")
Which would result in something like this:
/index?param1=p1¶m2=p2
Make sure that the documentation you are looking at is of the correct version, for 2.2.x you would need this url: http://www.playframework.com/documentation/2.2.x/ScalaOAuth