http: add request.flush() method
Forcibly flushes the request headers. You need this with long-lived HTTP connections where the first data isn't written until the connection has been established (think: tunneling requests over HTTP CONNECT.) Fixes #7296. Signed-off-by: Fedor Indutny <fedor@indutny.com>
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@ -845,6 +845,18 @@ Emitted when the server sends a '100 Continue' HTTP response, usually because
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the request contained 'Expect: 100-continue'. This is an instruction that
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the client should send the request body.
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### request.flush()
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Flush the request headers.
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For effiency reasons, node.js normally buffers the request headers until you
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call `request.end()` or write the first chunk of request data. It then tries
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hard to pack the request headers and data into a single TCP packet.
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That's usually what you want (it saves a TCP round-trip) but not when the first
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data isn't sent until possibly much later. `request.flush()` lets you bypass
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the optimization and kickstart the request.
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### request.write(chunk, [encoding])
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Sends a chunk of the body. By calling this method
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@ -595,3 +595,12 @@ OutgoingMessage.prototype._flush = function() {
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}
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}
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};
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OutgoingMessage.prototype.flush = function() {
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if (!this._header) {
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// Force-flush the headers.
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this._implicitHeader();
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this._send('');
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}
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};
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@ -0,0 +1,37 @@
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// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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var common = require('../common');
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var assert = require('assert');
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var http = require('http');
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http.createServer(function(req, res) {
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res.end('ok');
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this.close();
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}).listen(function() {
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var req = http.request({
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method: 'POST',
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host: this.address().address,
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port: this.address().port,
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});
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req.flush(); // Flush the request headers.
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req.flush(); // Should be idempotent.
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});
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