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doc: check for errors in 'listen' event
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In the docs we typically check for errors and surface them. This
is IMO a good idea and good practice. This PR adds a check for
errors in three places in the `net` docs where it was missing.

PR-URL: #4834
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Roman Klauke <romaaan.git@gmail.com>>
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benjamingr authored and rvagg committed Jan 25, 2016
1 parent f462320 commit fa1d453
Showing 1 changed file with 15 additions and 7 deletions.
22 changes: 15 additions & 7 deletions doc/api/net.markdown
Original file line number Diff line number Diff line change
Expand Up @@ -51,7 +51,8 @@ var server = net.createServer((socket) => {
});

// grab a random port.
server.listen(() => {
server.listen((err) => {
if (err) throw err;
address = server.address();
console.log('opened server on %j', address);
});
Expand Down Expand Up @@ -523,7 +524,8 @@ Here is an example of a client of the previously described echo server:

```js
const net = require('net');
const client = net.connect({port: 8124}, () => { //'connect' listener
const client = net.connect({port: 8124}, () => {
// 'connect' listener
console.log('connected to server!');
client.write('world!\r\n');
});
Expand Down Expand Up @@ -576,8 +578,8 @@ Here is an example of a client of the previously described echo server:

```js
const net = require('net');
const client = net.connect({port: 8124},
() => { //'connect' listener
const client = net.connect({port: 8124}, () => {
//'connect' listener
console.log('connected to server!');
client.write('world!\r\n');
});
Expand Down Expand Up @@ -644,15 +646,18 @@ on port 8124:

```js
const net = require('net');
const server = net.createServer((c) => { //'connection' listener
const server = net.createServer((c) => {
// 'connection' listener
console.log('client connected');
c.on('end', () => {
console.log('client disconnected');
});
c.write('hello\r\n');
c.pipe(c);
});
server.listen(8124, () => { //'listening' listener
server.listen(8124, (err) => {
// 'listening' listener
if (err) throw err;
console.log('server bound');
});
```
Expand All @@ -667,7 +672,10 @@ To listen on the socket `/tmp/echo.sock` the third line from the last would
just be changed to

```js
server.listen('/tmp/echo.sock', () => { /* 'listening' listener*/ })
server.listen('/tmp/echo.sock', (err) => {
// 'listening' listener
if (err) throw err;
});
```

Use `nc` to connect to a UNIX domain socket server:
Expand Down

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