Binds an HTTP request header to an HTTPController property or responder method argument.

This metadata may be applied to a responder method argument or a property of an HTTPController. When the incoming request has a matching header name, the argument or property is set to the header's value. For example, the following controller reads the header 'x-timestamp' into timestamp for use in the responder method:

  class UserController extends HTTPController {
    @httpGet
    Future<Response> getUser(@HTTPHeader("x-timestamp") DateTime timestamp) async => ...;
  }

The type of a bound property or argument must either be a String or implement a static parse method (e.g., int.parse, DateTime.parse).

If a declaration with this metadata is a positional argument in a responder method, it is required for that method. e.g. the above example shows a required positional argument If a declaration with this metadata is an optional argument in a responder method, it is optional for that method. e.g. getUser({@HTTPHeader("x-timestamp") DateTime timestamp}) async => ...; If a declaration with this metadata is a property without any additional metadata, it is optional for all methods in an HTTPController. If a declaration with this metadata is a property with requiredHTTPParameter, it is required for all methods in an HTTPController.

Requirements that are not met will be evoke a 400 Bad Request response with the name of the missing header in the JSON error body. No responder method will be called in this case.

If not required and not present in a request, the bound arguments and properties will be null when the responder method is invoked.

Inheritance
  • Object
  • HTTPBinding
  • HTTPHeader

Constructors

HTTPHeader(String header)

Binds an HTTP request header to an HTTPController property or responder method argument.

const

Properties

type → String

@override, read-only
externalName → String

The name of the variable in the HTTP request.

final, inherited
hashCode → int

The hash code for this object.

read-only, inherited
runtimeType → Type

A representation of the runtime type of the object.

read-only, inherited

Operators

operator ==(other) → bool

The equality operator.

inherited

Methods

parse(ClassMirror intoType, Request request) → dynamic

convertParameterListWithMirror(List<String> parameterValues, TypeMirror typeMirror) → dynamic

inherited
convertParameterWithMirror(String parameterValue, TypeMirror typeMirror) → dynamic

inherited
noSuchMethod(Invocation invocation) → dynamic

Invoked when a non-existent method or property is accessed.

inherited
toString() → String

Returns a string representation of this object.

inherited