description

# HttpRequest class Null safety

A server-side object that contains the content of and information about an HTTP request.

Note: Check out the http_server package, which makes working with the low-level dart:io HTTP server subsystem easier.

`HttpRequest` objects are generated by an HttpServer, which listens for HTTP requests on a specific host and port. For each request received, the HttpServer, which is a Stream, generates an `HttpRequest` object and adds it to the stream.

An `HttpRequest` object delivers the body content of the request as a stream of byte lists. The object also contains information about the request, such as the method, URI, and headers.

In the following code, an HttpServer listens for HTTP requests. When the server receives a request, it uses the HttpRequest object's `method` property to dispatch requests.

    final HOST = InternetAddress.loopbackIPv4;
    final PORT = 80;

    HttpServer.bind(HOST, PORT).then((_server) {
      _server.listen((HttpRequest request) {
        switch (request.method) {
          case 'GET':
            handleGetRequest(request);
            break;
          case 'POST':
            ...
        }
      },
      onError: handleError);    // listen() failed.
    }).catchError(handleError);

An HttpRequest object provides access to the associated HttpResponse object through the response property. The server writes its response to the body of the HttpResponse object. For example, here's a function that responds to a request:

    void handleGetRequest(HttpRequest req) {
      HttpResponse res = req.response;
      res.write('Received request ${req.method}: ${req.uri.path}');
      res.close();
    }

Implemented types
  - Stream<Uint8List>

## Constructors

HttpRequest()

## Properties

certificate → X509Certificate?
  The client certificate of the client making the request. [...]
  read-only
connectionInfo → HttpConnectionInfo?
  Information about the client connection. [...]
  read-only
contentLength → int
  The content length of the request body. [...]
  read-only
cookies → List<Cookie>
  The cookies in the request, from the "Cookie" headers.
  read-only
first → Future<Uint8List>
  The first element of this stream. [...]
  read-only, inherited
hashCode → int
  The hash code for this object. [...]
  read-only, inherited
headers → HttpHeaders
  The request headers. [...]
  read-only
isBroadcast → bool
  Whether this stream is a broadcast stream.
  read-only, inherited
isEmpty → Future<bool>
  Whether this stream contains any elements. [...]
  read-only, inherited
last → Future<Uint8List>
  The last element of this stream. [...]
  read-only, inherited
length → Future<int>
  The number of elements in this stream. [...]
  read-only, inherited
method → String
  The method, such as 'GET' or 'POST', for the request.
  read-only
persistentConnection → bool
  The persistent connection state signaled by the client.
  read-only
protocolVersion → String
  The HTTP protocol version used in the request, either "1.0" or "1.1".
  read-only
requestedUri → Uri
  The requested URI for the request. [...]
  read-only
response → HttpResponse
  The HttpResponse object, used for sending back the response to the client. [...]
  read-only
runtimeType → Type
  A representation of the runtime type of the object.
  read-only, inherited
session → HttpSession
  The session for the given request. [...]
  read-only
single → Future<Uint8List>
  The single element of this stream. [...]
  read-only, inherited
uri → Uri
  The URI for the request. [...]
  read-only

## Methods

any(bool test(Uint8List element)) → Future<bool>
  Checks whether `test` accepts any element provided by this stream. [...]
  inherited
asBroadcastStream({void onListen(StreamSubscription<Uint8List> subscription), void onCancel(StreamSubscription<Uint8List> subscription)}) → Stream<Uint8List>
  Returns a multi-subscription stream that produces the same events as this. [...]
  inherited
asyncExpand<E>(Stream<E>? convert(Uint8List event)) → Stream<E>
  Transforms each element into a sequence of asynchronous events. [...]
  inherited
asyncMap<E>(FutureOr<E> convert(Uint8List event)) → Stream<E>
  Creates a new stream with each data event of this stream asynchronously mapped to a new event. [...]
  inherited
cast<R>() → Stream<R>
  Adapt this stream to be a `Stream<R>`. [...]
  inherited
contains(Object? needle) → Future<bool>
  Returns whether `needle` occurs in the elements provided by this stream. [...]
  inherited
distinct([bool equals(Uint8List previous, Uint8List next)]) → Stream<Uint8List>
  Skips data events if they are equal to the previous data event. [...]
  inherited
drain<E>([E? futureValue]) → Future<E>
  Discards all data on this stream, but signals when it is done or an error occurred. [...]
  inherited
elementAt(int index) → Future<Uint8List>
  Returns the value of the `index`th data event of this stream. [...]
  inherited
every(bool test(Uint8List element)) → Future<bool>
  Checks whether `test` accepts all elements provided by this stream. [...]
  inherited
expand<S>(Iterable<S> convert(Uint8List element)) → Stream<S>
  Transforms each element of this stream into a sequence of elements. [...]
  inherited
firstWhere(bool test(Uint8List element), {Uint8List orElse()}) → Future<Uint8List>
  Finds the first element of this stream matching `test`. [...]
  inherited
fold<S>(S initialValue, S combine(S previous, Uint8List element)) → Future<S>
  Combines a sequence of values by repeatedly applying `combine`. [...]
  inherited
forEach(void action(Uint8List element)) → Future
  Executes `action` on each element of this stream. [...]
  inherited
handleError(Function onError, {bool test(dynamic error)}) → Stream<Uint8List>
  Creates a wrapper Stream that intercepts some errors from this stream. [...]
  inherited
join([String separator = ""]) → Future<String>
  Combines the string representation of elements into a single string. [...]
  inherited
lastWhere(bool test(Uint8List element), {Uint8List orElse()}) → Future<Uint8List>
  Finds the last element in this stream matching `test`. [...]
  inherited
listen(void onData(Uint8List event), {Function? onError, void onDone(), bool? cancelOnError}) → StreamSubscription<Uint8List>
  Adds a subscription to this stream. [...]
  inherited
map<S>(S convert(Uint8List event)) → Stream<S>
  Transforms each element of this stream into a new stream event. [...]
  inherited
noSuchMethod(Invocation invocation) → dynamic
  Invoked when a non-existent method or property is accessed. [...]
  inherited
pipe(StreamConsumer<Uint8List> streamConsumer) → Future
  Pipes the events of this stream into `streamConsumer`. [...]
  inherited
reduce(Uint8List combine(Uint8List previous, Uint8List element)) → Future<Uint8List>
  Combines a sequence of values by repeatedly applying `combine`. [...]
  inherited
singleWhere(bool test(Uint8List element), {Uint8List orElse()}) → Future<Uint8List>
  Finds the single element in this stream matching `test`. [...]
  inherited
skip(int count) → Stream<Uint8List>
  Skips the first `count` data events from this stream. [...]
  inherited
skipWhile(bool test(Uint8List element)) → Stream<Uint8List>
  Skip data events from this stream while they are matched by `test`. [...]
  inherited
take(int count) → Stream<Uint8List>
  Provides at most the first `count` data events of this stream. [...]
  inherited
takeWhile(bool test(Uint8List element)) → Stream<Uint8List>
  Forwards data events while `test` is successful. [...]
  inherited
timeout(Duration timeLimit, {void onTimeout(EventSink<Uint8List> sink)}) → Stream<Uint8List>
  Creates a new stream with the same events as this stream. [...]
  inherited
toList() → Future<List<Uint8List>>
  Collects all elements of this stream in a List. [...]
  inherited
toSet() → Future<Set<Uint8List>>
  Collects the data of this stream in a Set. [...]
  inherited
toString() → String
  Returns a string representation of this object.
  inherited
transform<S>(StreamTransformer<Uint8List, S> streamTransformer) → Stream<S>
  Applies `streamTransformer` to this stream. [...]
  inherited
where(bool test(Uint8List event)) → Stream<Uint8List>
  Creates a new stream from this stream that discards some elements. [...]
  inherited

## Operators

operator ==(Object other) → bool
  The equality operator. [...]
  inherited