formFieldMap

def formFieldMap: Directive1[Map[String, String]]

Description

Extracts all HTTP form fields at once as a Map[String, String]Map<String, String> mapping form field names to form field values. Data posted from HTML Forms is either of type application/x-www-form-urlencoded or of type multipart/form-data.

If form data contain a field value several times, the map will contain the last one.

See formFields for an in-depth description.

Warning

Use of this directive can result in performance degradation or even in OutOfMemoryError s. See formFieldSeqformFieldList for details.

Example

Scala

copysourceval route =
  formFieldMap { fields =>
    def formFieldString(formField: (String, String)): String =
      s"""${formField._1} = '${formField._2}'"""
    complete(s"The form fields are ${fields.map(formFieldString).mkString(", ")}")
  }

// tests:
Post("/", FormData("color" -> "blue", "count" -> "42")) ~> route ~> check {
  responseAs[String] shouldEqual "The form fields are color = 'blue', count = '42'"
}
Post("/", FormData("x" -> "1", "x" -> "5")) ~> route ~> check {
  responseAs[String] shouldEqual "The form fields are x = '5'"
}

Java

copysourceimport static akka.http.javadsl.server.Directives.complete;
import static akka.http.javadsl.server.Directives.formFieldMap;

final Function<Map<String, String>, String> mapToString = map ->
  map.entrySet()
    .stream()
    .map(e -> e.getKey() + " = '" + e.getValue() +"'")
    .collect(Collectors.joining(", "));


final Route route = formFieldMap(fields ->
  complete("The form fields are " + mapToString.apply(fields))
);

// tests:
final FormData formDataDiffKey =
  FormData.create(
    Pair.create("color", "blue"),
    Pair.create("count", "42"));
testRoute(route).run(HttpRequest.POST("/").withEntity(formDataDiffKey.toEntity()))
  .assertEntity("The form fields are color = 'blue', count = '42'");

final FormData formDataSameKey =
  FormData.create(
    Pair.create("x", "1"),
    Pair.create("x", "5"));
testRoute(route).run(HttpRequest.POST("/").withEntity(formDataSameKey.toEntity()))
  .assertEntity( "The form fields are x = '5'");