dart:io
HttpRequest class
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();
}
- Implements
-
Constructors
- HttpRequest()
Properties
- certificate → X509Certificate
read-only
- The client certificate of the client making the request. [...]
- connectionInfo → HttpConnectionInfo
read-only
- Information about the client connection. [...]
- contentLength → int
read-only
- The content length of the request body. [...]
- cookies → List<Cookie>
read-only
- The cookies in the request, from the Cookie headers.
- The request headers. [...]
- method → String
read-only
- The method, such as 'GET' or 'POST', for the request.
- persistentConnection → bool
read-only
- The persistent connection state signaled by the client.
- protocolVersion → String
read-only
- The HTTP protocol version used in the request, either "1.0" or "1.1".
- requestedUri → Uri
read-only
- The requested URI for the request. [...]
- response → HttpResponse
read-only
- The HttpResponse object, used for sending back the response to the client. [...]
- session → HttpSession
read-only
- The session for the given request. [...]
- uri → Uri
read-only
- The URI for the request. [...]
- first → Future<List<int>>
read-only, inherited
- The first element of the stream. [...]
- hashCode → int
read-only, inherited
- The hash code for this object. [...]
- isBroadcast → bool
read-only, inherited
- Whether this stream is a broadcast stream.
- isEmpty → Future<bool>
read-only, inherited
- Whether this stream contains any elements. [...]
- last → Future<List<int>>
read-only, inherited
- The last element of this stream. [...]
- length → Future<int>
read-only, inherited
- The number of elements in this stream. [...]
- runtimeType → Type
read-only, inherited
- A representation of the runtime type of the object.
- single → Future<List<int>>
read-only, inherited
- The single element of this stream. [...]
Methods
- any(bool test(T element)) → Future<bool>
inherited
- Checks whether
test
accepts any element provided by this stream. [...] - asBroadcastStream({void onListen(StreamSubscription<T> subscription), void onCancel(StreamSubscription<T> subscription) }) → Stream<List<int>>
inherited
- Returns a multi-subscription stream that produces the same events as this. [...]
- asyncExpand<E>(Stream<E> convert(T event)) → Stream<E>
inherited
- Transforms each element into a sequence of asynchronous events. [...]
- asyncMap<E>(FutureOr<E> convert(T event)) → Stream<E>
inherited
- Creates a new stream with each data event of this stream asynchronously mapped to a new event. [...]
- cast<R>() → Stream<R>
inherited
- Adapt this stream to be a
Stream<R>
. [...] - contains(Object needle) → Future<bool>
inherited
- Returns whether
needle
occurs in the elements provided by this stream. [...] - distinct([bool equals(T previous, T next) ]) → Stream<List<int>>
inherited
- Skips data events if they are equal to the previous data event. [...]
- drain<E>([E futureValue ]) → Future<E>
inherited
- Discards all data on the stream, but signals when it's done or an error occurred. [...]
- elementAt(int index) → Future<List<int>>
inherited
- Returns the value of the
index
th data event of this stream. [...] - every(bool test(T element)) → Future<bool>
inherited
- Checks whether
test
accepts all elements provided by this stream. [...] - expand<S>(Iterable<S> convert(T element)) → Stream<S>
inherited
- Transforms each element of this stream into a sequence of elements. [...]
- firstWhere(bool test(T element), { List<int> orElse() }) → Future<List<int>>
inherited
- Finds the first element of this stream matching
test
. [...] - fold<S>(S initialValue, S combine(S previous, T element)) → Future<S>
inherited
- Combines a sequence of values by repeatedly applying
combine
. [...] - forEach(void action(T element)) → Future
inherited
- Executes
action
on each element of the stream. [...] - handleError(Function onError, { bool test(dynamic error) }) → Stream<List<int>>
inherited
- Creates a wrapper Stream that intercepts some errors from this stream. [...]
- join([String separator = "" ]) → Future<String>
inherited
- Combines the string representation of elements into a single string. [...]
- lastWhere(bool test(T element), { List<int> orElse() }) → Future<List<int>>
inherited
- Finds the last element in this stream matching
test
. [...] - listen(void onData(T event), { Function onError, void onDone(), bool cancelOnError }) → StreamSubscription<List<int>>
inherited
- Adds a subscription to this stream. [...]
- map<S>(S convert(T event)) → Stream<S>
inherited
- Transforms each element of this stream into a new stream event. [...]
- noSuchMethod(Invocation invocation) → dynamic
inherited
- Invoked when a non-existent method or property is accessed. [...]
- pipe(StreamConsumer<List<int>> streamConsumer) → Future
inherited
- Pipes the events of this stream into
streamConsumer
. [...] - reduce(List<int> combine(T previous, T element)) → Future<List<int>>
inherited
- Combines a sequence of values by repeatedly applying
combine
. [...] - singleWhere(bool test(T element), { List<int> orElse() }) → Future<List<int>>
inherited
- Finds the single element in this stream matching
test
. [...] - skip(int count) → Stream<List<int>>
inherited
- Skips the first
count
data events from this stream. [...] - skipWhile(bool test(T element)) → Stream<List<int>>
inherited
- Skip data events from this stream while they are matched by
test
. [...] - take(int count) → Stream<List<int>>
inherited
- Provides at most the first
count
data events of this stream. [...] - takeWhile(bool test(T element)) → Stream<List<int>>
inherited
- Forwards data events while
test
is successful. [...] - timeout(Duration timeLimit, { void onTimeout(EventSink<T> sink) }) → Stream<List<int>>
inherited
- Creates a new stream with the same events as this stream. [...]
- toList() → Future<List<List<int>>>
inherited
- Collects all elements of this stream in a List. [...]
- toSet() → Future<Set<List<int>>>
inherited
- Collects the data of this stream in a Set. [...]
- toString() → String
inherited
- Returns a string representation of this object.
- transform<S>(StreamTransformer<List<int>, S> streamTransformer) → Stream<S>
inherited
- Applies a StreamTransformer to the current stream. [...]
- where(bool test(T event)) → Stream<List<int>>
inherited
- Creates a new stream from this stream that discards some elements. [...]
Operators
- operator ==(dynamic other) → bool
inherited
- The equality operator. [...]