Created
November 8, 2015 03:15
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duplexer2 example for node 4.x
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| #!/usr/bin/env node | |
| "use strict"; | |
| const stream = require("readable-stream"); | |
| const duplexer2 = require("duplexer2"); | |
| const writable = new class extends stream.Writable { | |
| constructor() { | |
| super({objectMode: true}) | |
| } | |
| _write(input, encoding, done) { | |
| if (readable.push(input)) { | |
| return done(); | |
| } else { | |
| readable.once("drain", done); | |
| } | |
| } | |
| }; | |
| const readable = new class extends stream.Readable { | |
| constructor() { | |
| super({objectMode: true}) | |
| } | |
| _read() { | |
| // no-op | |
| } | |
| }; | |
| // simulate the readable thing closing after a bit | |
| writable.once("finish", () => { | |
| setTimeout(() => { | |
| readable.push(null); | |
| }, 500); | |
| }); | |
| var duplex = duplexer2(writable, readable); | |
| duplex.on("data", e => { | |
| console.log("got data", JSON.stringify(e)); | |
| }); | |
| duplex.on("finish", () => { | |
| console.log("got finish event"); | |
| }); | |
| duplex.on("end", () => { | |
| console.log("got end event"); | |
| }); | |
| duplex.write("oh, hi there", () => { | |
| console.log("finished writing"); | |
| }); | |
| duplex.end(() => { | |
| console.log("finished ending"); | |
| }); |
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