restifier.js

restifier.js is a simple client-side utility that pairs with node-restify. It is heavily based on restify's client classes, but redesigned for use as a client side library.

How to use

Incude the script:

<script type="text/javascript" src="restifier.js"></script>

Then construct a client:

var client = restifier.createJsonClient('https://api.myservice.com/');

Now call an api method:

// call post on the client
var data = {
    content: 'Something is going on here...',
};

client.post('/note', data, function (err, json) {
    if (err) {
        // yes, you should do something when there is an error...
    } else {
        // probably should do something on success too...
    }
});

Clients

Creating a server is straightforward, as you simply invoke the createClient API, which takes an options object with the options listed below:

var client = restifier.createClient();

There are actually three separate clients shipped in restifier:

• JsonClient: sends and expects application/json
• StringClient: sends url-encoded request and expects text/plain
• HttpClient: thin wrapper over node's http/https libraries

The idea being that if you want to support "typical" control-plane REST APIs, you probably want the JsonClient, or if you're using some other serialization (like XML) you'd write your own client that extends the StringClient. If you need streaming support, you'll need to do some work on top of the HttpClient, as StringClient and friends buffer requests/responses.

All clients support retry with exponential backoff for getting a TCP connection; they do not perform retries on 5xx error codes like previous versions of the restify client. You can set retry to false to disable this logic altogether. Also, all clients support a connectTimeout field, which is use on each retry. The default is not to set a connectTimeout, so you end up with the node.js socket defaults.

Here's an example of hitting the Joyent CloudAPI:

// Creates a JSON client
var client = restify.createJsonClient({
  url: 'https://us-west-1.api.joyentcloud.com'
});


client.basicAuth('$login', '$password');
client.get('/my/machines', function (err, req, res, obj) {
  assert.ifError(err);

  console.log(JSON.stringify(obj, null, 2));
});

As a short-hand, a client can be initialized with a string-URL rather than an options object:

var client = restifier.createJsonClient('https://us-west-1.api.joyentcloud.com');

Note that all further documentation refers to the "short-hand" form of methods like get/put/del which take a string path. You can also pass in an object to any of those methods with extra params (notably headers):

var options = {
  path: '/foo/bar',
  headers: {
    'x-foo': 'bar'
  },
  retry: {
    'retries': 0
  },
  agent: false
};

client.get(options, function (err, req, res) { .. });

If you need to interpose additional headers in the request before it is sent on to the server, you can provide a synchronous callback function as the signRequest option when creating a client. This is particularly useful with node-http-signature, which needs to attach a cryptographic signature of selected outgoing headers. If provided, this callback will be invoked with a single parameter: the outgoing http.ClientRequest object.

JsonClient

The JSON Client is the highest-level client bundled with restify; it exports a set of methods that map directly to HTTP verbs. All callbacks look like function(err, req, res, [obj]), where obj is optional, depending on if content was returned. HTTP status codes are not interpreted, so if the server returned 4xx or something with a JSON payload, obj will be the JSON payload. err however will be set if the server returned a status code >= 400 (it will be one of the restify HTTP errors). If obj looks like a RestError:

{
  "code": "FooError",
  "message": "some foo happened"
}

then err gets "upconverted" into a RestError for you. Otherwise it will be an HttpError.

createJsonClient(options)

var client = restify.createJsonClient({
  url: 'https://api.us-west-1.joyentcloud.com',
  version: '*'
});

Options:

get(path, callback)

Performs an HTTP get; if no payload was returned, obj defaults to {} for you (so you don't get a bunch of null pointer errors).

client.get('/foo/bar', function(err, req, res, obj) {
  assert.ifError(err);
  console.log('%j', obj);
});

head(path, callback)

Just like get, but without obj:

client.head('/foo/bar', function(err, req, res) {
  assert.ifError(err);
  console.log('%d -> %j', res.statusCode, res.headers);
});

post(path, object, callback)

Takes a complete object to serialize and send to the server.

client.post('/foo', { hello: 'world' }, function(err, req, res, obj) {
  assert.ifError(err);
  console.log('%d -> %j', res.statusCode, res.headers);
  console.log('%j', obj);
});

put(path, object, callback)

Just like post:

client.put('/foo', { hello: 'world' }, function(err, req, res, obj) {
  assert.ifError(err);
  console.log('%d -> %j', res.statusCode, res.headers);
  console.log('%j', obj);
});

del(path, callback)

del doesn't take content:

client.del('/foo/bar', function(err, req, res) {
  assert.ifError(err);
  console.log('%d -> %j', res.statusCode, res.headers);
});

StringClient

StringClient is what JsonClient is built on, and provides a base for you to write other buffering/parsing clients (like say an XML client). If you need to talk to some "raw" HTTP server, then StringClient is what you want, as it by default will provide you with content uploads in application/x-www-form-url-encoded and downloads as text/plain. To extend a StringClient, take a look at the source for JsonClient. Effectively, you extend it, and set the appropriate options in the constructor and implement a write (for put/post) and parse method (for all HTTP bodies), and that's it.

createStringClient(options)

var client = restify.createStringClient({
  url: 'https://example.com'
})

get(path, callback)

Performs an HTTP get; if no payload was returned, data defaults to '' for you (so you don't get a bunch of null pointer errors).

client.get('/foo/bar', function(err, req, res, data) {
  assert.ifError(err);
  console.log('%s', data);
});

head(path, callback)

Just like get, but without data:

client.head('/foo/bar', function(err, req, res) { assert.ifError(err); console.log('%d -> %j', res.statusCode, res.headers); });

#### post(path, object, callback)

Takes a complete object to serialize and send to the server.

```js
client.post('/foo', { hello: 'world' }, function(err, req, res, data) {
  assert.ifError(err);
  console.log('%d -> %j', res.statusCode, res.headers);
  console.log('%s', data);
});

put(path, object, callback)

Just like post:

client.put('/foo', { hello: 'world' }, function(err, req, res, data) {
  assert.ifError(err);
  console.log('%d -> %j', res.statusCode, res.headers);
  console.log('%s', data);
});

del(path, callback)

del doesn't take content, since you know, it should't:

client.del('/foo/bar', function (err, req, res) {
  if (err) { ... }
  console.log('%d -> %j', res.status, res.headers);
});

HttpClient

HttpClient is the lowest-level client shipped in restifier, and is basically just some sugar over the XMLHttpRequest class.

client = restify.createClient({
  url: 'http://127.0.0.1'
});

client.get('/str/mcavage', function (err, req) {
  // req will be an XMLHttpRequest object
});

Or a write:

client.post(opts, function(err, req) {
  assert.ifError(connectErr);

  req.on('result', function(err, res) {
    assert.ifError(err);
    res.body = '';
    res.setEncoding('utf8');
    res.on('data', function(chunk) {
      res.body += chunk;
    });

    res.on('end', function() {
      console.log(res.body);
    });
  });

  req.write('hello world');
  req.end();
});

Has all the same methods exist as JsonClient/StringClient.

One wishing to extend the HttpClient should look at the internals and note that read and write probably need to be overridden.

basicAuth(username, password)

Since it hasn't been mentioned yet, this convenience method (available on all clients), just sets the Authorization header for all HTTP requests:

client.basicAuth('mark', 'mysupersecretpassword');