ServerResponse
This object is created internally by an HTTP server, not by the user. It is passed as the second parameter to the 'request'
event.
Since
v0.1.17
Properties
Alias of outgoingMessage.socket
.
Read-only. true
if the headers were sent, otherwise false
.
Is true
if it is safe to call writable.write()
, which means the stream has not been destroyed, errored, or ended.
When using implicit headers (not calling response.writeHead()
explicitly), this property controls the status code that will be sent to the client when the headers get flushed.
When using implicit headers (not calling response.writeHead()
explicitly), this property controls the status message that will be sent to the client when the headers get flushed. If this is left as undefined
then the standard message for the status code will be used.
If set to true
, Node.js will check whether the Content-Length
header value and the size of the body, in bytes, are equal. Mismatching the Content-Length
header value will result in an Error
being thrown, identified by code:``'ERR_HTTP_CONTENT_LENGTH_MISMATCH'
.
Number of times writable.uncork()
needs to be called in order to fully uncork the stream.
Is true
after writable.end()
has been called. This property does not indicate whether the data has been flushed, for this use writable.writableFinished
instead.
Is set to true
immediately before the 'finish'
event is emitted.
Return the value of highWaterMark
passed when creating this Writable
.
This property contains the number of bytes (or objects) in the queue ready to be written. The value provides introspection data regarding the status of the highWaterMark
.
Is true
if the stream's buffer has been full and stream will emit 'drain'
.
Getter for the property objectMode
of a given Writable
stream.
Functions
Alias for emitter.on(eventName, listener)
.
Event emitter The defined events on documents including:
Adds HTTP trailers (headers but at the end of the message) to the message.
Append a single header value to the header object.
Destroy the stream. Optionally emit an 'error'
event, and emit a 'close'
event (unless emitClose
is set to false
). After this call, the writable stream has ended and subsequent calls to write()
or end()
will result in an ERR_STREAM_DESTROYED
error. This is a destructive and immediate way to destroy a stream. Previous calls to write()
may not have drained, and may trigger an ERR_STREAM_DESTROYED
error. Use end()
instead of destroy if data should flush before close, or wait for the 'drain'
event before destroying the stream.
Synchronously calls each of the listeners registered for the event named eventName
, in the order they were registered, passing the supplied arguments to each.
Calling the writable.end()
method signals that no more data will be written to the Writable
. The optional chunk
and encoding
arguments allow one final additional chunk of data to be written immediately before closing the stream.
Returns an array listing the events for which the emitter has registered listeners. The values in the array are strings or Symbol
s.
Flushes the message headers.
Returns an array containing the unique names of the current outgoing headers. All names are lowercase.
Returns a shallow copy of the current outgoing headers. Since a shallow copy is used, array values may be mutated without additional calls to various header-related HTTP module methods. The keys of the returned object are the header names and the values are the respective header values. All header names are lowercase.
Returns the current max listener value for the EventEmitter
which is either set by emitter.setMaxListeners(n)
or defaults to {@link defaultMaxListeners}.
Returns the number of listeners listening for the event named eventName
. If listener
is provided, it will return how many times the listener is found in the list of the listeners of the event.
Returns a copy of the array of listeners for the event named eventName
.
Alias for emitter.removeListener()
.
Adds the listener
function to the end of the listeners array for the event named eventName
. No checks are made to see if the listener
has already been added. Multiple calls passing the same combination of eventName
and listener
will result in the listener
being added, and called, multiple times.
Adds a one-time listener
function for the event named eventName
. The next time eventName
is triggered, this listener is removed and then invoked.
Adds the listener
function to the beginning of the listeners array for the event named eventName
. No checks are made to see if the listener
has already been added. Multiple calls passing the same combination of eventName
and listener
will result in the listener
being added, and called, multiple times.
Adds a one-timelistener
function for the event named eventName
to the beginning of the listeners array. The next time eventName
is triggered, this listener is removed, and then invoked.
Returns a copy of the array of listeners for the event named eventName
, including any wrappers (such as those created by .once()
).
Removes all listeners, or those of the specified eventName
.
Removes a header that is queued for implicit sending.
Removes the specified listener
from the listener array for the event named eventName
.
The writable.setDefaultEncoding()
method sets the default encoding
for a Writable
stream.
Sets a single header value. If the header already exists in the to-be-sent headers, its value will be replaced. Use an array of strings to send multiple headers with the same name.
By default EventEmitter
s will print a warning if more than 10
listeners are added for a particular event. This is a useful default that helps finding memory leaks. The emitter.setMaxListeners()
method allows the limit to be modified for this specific EventEmitter
instance. The value can be set to Infinity
(or 0
) to indicate an unlimited number of listeners.
Once a socket is associated with the message and is connected, socket.setTimeout()
will be called with msecs
as the first parameter.
The writable.write()
method writes some data to the stream, and calls the supplied callback
once the data has been fully handled. If an error occurs, the callback
will be called with the error as its first argument. The callback
is called asynchronously and before 'error'
is emitted.
Sends an HTTP/1.1 100 Continue message to the client, indicating that the request body should be sent. See the 'checkContinue'
event on Server
.
Sends an HTTP/1.1 103 Early Hints message to the client with a Link header, indicating that the user agent can preload/preconnect the linked resources. The hints
is an object containing the values of headers to be sent with early hints message. The optional callback
argument will be called when the response message has been written.
Sends a response header to the request. The status code is a 3-digit HTTP status code, like 404
. The last argument, headers
, are the response headers. Optionally one can give a human-readable statusMessage
as the second argument.
Sends a HTTP/1.1 102 Processing message to the client, indicating that the request body should be sent.