request/README.md

# Request — Simplified HTTP client
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## Super simple to use

Request is designed to be the simplest way possible to make http calls. It supports HTTPS and follows redirects by default.

```javascript
var request = require('request');
request('http://www.google.com', function (error, response, body) {
  if (!error && response.statusCode == 200) {
    console.log(body) // Print the google web page.
  }
})
```

## Streaming

You can stream any response to a file stream.

```javascript
request('http://google.com/doodle.png').pipe(fs.createWriteStream('doodle.png'))
```

You can also stream a file to a PUT or POST request. This method will also check the file extension against a mapping of file extensions to content-types (in this case `application/json`) and use the proper `content-type` in the PUT request (if the headers don’t already provide one).

```javascript
fs.createReadStream('file.json').pipe(request.put('http://mysite.com/obj.json'))
```

Request can also `pipe` to itself. When doing so, `content-type` and `content-length` are preserved in the PUT headers.

```javascript
request.get('http://google.com/img.png').pipe(request.put('http://mysite.com/img.png'))
```

Request emits a "response" event when a response is received. The `response` argument will be an instance of [http.IncomingMessage](http://nodejs.org/api/http.html#http_http_incomingmessage).

```javascript
request
  .get('http://google.com/img.png')
  .on('response', function(response) {
    console.log(response.statusCode) // 200
    console.log(response.headers['content-type']) // 'image/png'
  })
  .pipe(request.put('http://mysite.com/img.png'))
```

Now let’s get fancy.

```javascript
http.createServer(function (req, resp) {
  if (req.url === '/doodle.png') {
    if (req.method === 'PUT') {
      req.pipe(request.put('http://mysite.com/doodle.png'))
    } else if (req.method === 'GET' || req.method === 'HEAD') {
      request.get('http://mysite.com/doodle.png').pipe(resp)
    }
  }
})
```

You can also `pipe()` from `http.ServerRequest` instances, as well as to `http.ServerResponse` instances. The HTTP method, headers, and entity-body data will be sent. Which means that, if you don't really care about security, you can do:

```javascript
http.createServer(function (req, resp) {
  if (req.url === '/doodle.png') {
    var x = request('http://mysite.com/doodle.png')
    req.pipe(x)
    x.pipe(resp)
  }
})
```

And since `pipe()` returns the destination stream in ≥ Node 0.5.x you can do one line proxying. :)

```javascript
req.pipe(request('http://mysite.com/doodle.png')).pipe(resp)
```

Also, none of this new functionality conflicts with requests previous features, it just expands them.

```javascript
var r = request.defaults({'proxy':'http://localproxy.com'})

http.createServer(function (req, resp) {
  if (req.url === '/doodle.png') {
    r.get('http://google.com/doodle.png').pipe(resp)
  }
})
```

You can still use intermediate proxies, the requests will still follow HTTP forwards, etc.

## Proxies

If you specify a `proxy` option, then the request (and any subsequent
redirects) will be sent via a connection to the proxy server.

If your endpoint is an `https` url, and you are using a proxy, then
request will send a `CONNECT` request to the proxy server *first*, and
then use the supplied connection to connect to the endpoint.

That is, first it will make a request like:

```
HTTP/1.1 CONNECT endpoint-server.com:80
Host: proxy-server.com
User-Agent: whatever user agent you specify
```

and then the proxy server make a TCP connection to `endpoint-server`
on port `80`, and return a response that looks like:

```
HTTP/1.1 200 OK
```

At this point, the connection is left open, and the client is
communicating directly with the `endpoint-server.com` machine.

See [the wikipedia page on HTTP Tunneling](http://en.wikipedia.org/wiki/HTTP_tunnel)
for more information.

By default, when proxying `http` traffic, request will simply make a
standard proxied `http` request.  This is done by making the `url`
section of the initial line of the request a fully qualified url to
the endpoint.

For example, it will make a single request that looks like:

```
HTTP/1.1 GET http://endpoint-server.com/some-url
Host: proxy-server.com
Other-Headers: all go here

request body or whatever
```

Because a pure "http over http" tunnel offers no additional security
or other features, it is generally simpler to go with a
straightforward HTTP proxy in this case.  However, if you would like
to force a tunneling proxy, you may set the `tunnel` option to `true`.

If you are using a tunneling proxy, you may set the
`proxyHeaderWhiteList` to share certain headers with the proxy.

By default, this set is:

```
accept
accept-charset
accept-encoding
accept-language
accept-ranges
cache-control
content-encoding
content-language
content-length
content-location
content-md5
content-range
content-type
connection
date
expect
max-forwards
pragma
proxy-authorization
referer
te
transfer-encoding
user-agent
via
```

Note that, when using a tunneling proxy, the `proxy-authorization`
header is *never* sent to the endpoint server, but only to the proxy
server.  All other headers are sent as-is over the established
connection.

### Controlling proxy behaviour using environment variables

The following environment variables are respected by `request`:

 * `HTTP_PROXY` / `http_proxy`
 * `HTTPS_PROXY` / `https_proxy`
 * `NO_PROXY` / `no_proxy`

When `HTTP_PROXY` / `http_proxy` are set, they will be used to proxy non-SSL requests that do not have an explicit `proxy` configuration option present. Similarly, `HTTPS_PROXY` / `https_proxy` will be respected for SSL requests that do not have an explicit `proxy` configuration option. It is valid to define a proxy in one of the environment variables, but then override it for a specific request, using the `proxy` configuration option. Furthermore, the `proxy` configuration option can be explicitly set to false / null to opt out of proxying altogether for that request.

`request` is also aware of the `NO_PROXY`/`no_proxy` environment variables. These variables provide a granular way to opt out of proxying, on a per-host basis. It should contain a comma separated list of hosts to opt out of proxying. It is also possible to opt of proxying when a particular destination port is used. Finally, the variable may be set to `*` to opt out of the implicit proxy configuration of the other environment variables.

Here's some examples of valid `no_proxy` values:

 * `google.com` - don't proxy HTTP/HTTPS requests to Google.
 * `google.com:443` - don't proxy HTTPS requests to Google, but *do* proxy HTTP requests to Google.
 * `google.com:443, yahoo.com:80` - don't proxy HTTPS requests to Google, and don't proxy HTTP requests to Yahoo!
 * `*` - ignore `https_proxy`/`http_proxy` environment variables altogether.

## UNIX Socket

`request` supports making requests to [UNIX Domain Sockets](http://en.wikipedia.org/wiki/Unix_domain_socket). To make one, use the following URL scheme:

```javascript
/* Pattern */ 'http://unix:SOCKET:PATH'
/* Example */ request.get('http://unix:/absolute/path/to/unix.socket:/request/path')
```

Note: The `SOCKET` path is assumed to be absolute to the root of the host file system.


## Forms

`request` supports `application/x-www-form-urlencoded` and `multipart/form-data` form uploads. For `multipart/related` refer to the `multipart` API.

#### application/x-www-form-urlencoded (URL-Encoded Forms)

URL-encoded forms are simple.

```javascript
request.post('http://service.com/upload', {form:{key:'value'}})
// or
request.post('http://service.com/upload').form({key:'value'})
// or
request.post({url:'http://service.com/upload', form: {key:'value'}}, function(err,httpResponse,body){ /* ... */ })
```

#### multipart/form-data (Multipart Form Uploads)

For `multipart/form-data` we use the [form-data](https://github.com/felixge/node-form-data) library by [@felixge](https://github.com/felixge). For the most cases, you can pass your upload form data via the `formData` option.


```javascript
var formData = {
  // Pass a simple key-value pair
  my_field: 'my_value',
  // Pass data via Buffers
  my_buffer: new Buffer([1, 2, 3]),
  // Pass data via Streams
  my_file: fs.createReadStream(__dirname + '/unicycle.jpg'),
  // Pass multiple values /w an Array
  attachments: [
    fs.createReadStream(__dirname + '/attacment1.jpg')
    fs.createReadStream(__dirname + '/attachment2.jpg')
  ],
  // Pass optional meta-data with an 'options' object with style: {value: DATA, options: OPTIONS}
  // See the `form-data` README for more information about options: https://github.com/felixge/node-form-data
  custom_file: {
    value:  fs.createReadStream('/dev/urandom'),
    options: {
      filename: 'topsecret.jpg',
      contentType: 'image/jpg'
    }
  }
};
request.post({url:'http://service.com/upload', formData: formData}, function optionalCallback(err, httpResponse, body) {
  if (err) {
    return console.error('upload failed:', err);
  }
  console.log('Upload successful!  Server responded with:', body);
});
```

For advanced cases, you can the form-data object itself via `r.form()`. This can be modified until the request is fired on the next cycle of the event-loop. (Note that this calling `form()` will clear the currently set form data for that request.)

```javascript
// NOTE: Advanced use-case, for normal use see 'formData' usage above
var r = request.post('http://service.com/upload', function optionalCallback(err, httpResponse, body) { // ...

var form = r.form();
form.append('my_field', 'my_value');
form.append('my_buffer', new Buffer([1, 2, 3]));
form.append('custom_file', fs.createReadStream(__dirname + '/unicycle.jpg'), {filename: 'unicycle.jpg'});
```
See the [form-data README](https://github.com/felixge/node-form-data) for more information & examples.

#### multipart/related

Some variations in different HTTP implementations require a newline/CRLF before, after, or both before and after the boundary of a `multipart/related` request (using the multipart option). This has been observed in the .NET WebAPI version 4.0. You can turn on a boundary preambleCRLF or postamble by passing them as `true` to your request options.

```javascript
  request(
    { method: 'PUT'
    , preambleCRLF: true
    , postambleCRLF: true
    , uri: 'http://service.com/upload'
    , multipart:
      [ { 'content-type': 'application/json'
        ,  body: JSON.stringify({foo: 'bar', _attachments: {'message.txt': {follows: true, length: 18, 'content_type': 'text/plain' }}})
        }
      , { body: 'I am an attachment' }
      ]
    }
  , function (error, response, body) {
      if (err) {
        return console.error('upload failed:', err);
      }
      console.log('Upload successful!  Server responded with:', body);
    }
  )
```


## HTTP Authentication

```javascript
request.get('http://some.server.com/').auth('username', 'password', false);
// or
request.get('http://some.server.com/', {
  'auth': {
    'user': 'username',
    'pass': 'password',
    'sendImmediately': false
  }
});
// or
request.get('http://some.server.com/').auth(null, null, true, 'bearerToken');
// or
request.get('http://some.server.com/', {
  'auth': {
    'bearer': 'bearerToken'
  }
});
```

If passed as an option, `auth` should be a hash containing values `user` || `username`, `pass` || `password`, and `sendImmediately` (optional).  The method form takes parameters `auth(username, password, sendImmediately)`.

`sendImmediately` defaults to `true`, which causes a basic authentication header to be sent.  If `sendImmediately` is `false`, then `request` will retry with a proper authentication header after receiving a `401` response from the server (which must contain a `WWW-Authenticate` header indicating the required authentication method).

Note that you can also use for basic authentication a trick using the URL itself, as specified in [RFC 1738](http://www.ietf.org/rfc/rfc1738.txt).
Simply pass the `user:password` before the host with an `@` sign.

```javascript
var username = 'username',
    password = 'password',
    url = 'http://' + username + ':' + password + '@some.server.com';

request({url: url}, function (error, response, body) {
   // Do more stuff with 'body' here
});
```

Digest authentication is supported, but it only works with `sendImmediately` set to `false`; otherwise `request` will send basic authentication on the initial request, which will probably cause the request to fail.

Bearer authentication is supported, and is activated when the `bearer` value is available. The value may be either a `String` or a `Function` returning a `String`. Using a function to supply the bearer token is particularly useful if used in conjuction with `defaults` to allow a single function to supply the last known token at the time or sending a request or to compute one on the fly.

## OAuth Signing

```javascript
// Twitter OAuth
var qs = require('querystring')
  , oauth =
    { callback: 'http://mysite.com/callback/'
    , consumer_key: CONSUMER_KEY
    , consumer_secret: CONSUMER_SECRET
    }
  , url = 'https://api.twitter.com/oauth/request_token'
  ;
request.post({url:url, oauth:oauth}, function (e, r, body) {
  // Ideally, you would take the body in the response
  // and construct a URL that a user clicks on (like a sign in button).
  // The verifier is only available in the response after a user has
  // verified with twitter that they are authorizing your app.
  var access_token = qs.parse(body)
    , oauth =
      { consumer_key: CONSUMER_KEY
      , consumer_secret: CONSUMER_SECRET
      , token: access_token.oauth_token
      , verifier: access_token.oauth_verifier
      }
    , url = 'https://api.twitter.com/oauth/access_token'
    ;
  request.post({url:url, oauth:oauth}, function (e, r, body) {
    var perm_token = qs.parse(body)
      , oauth =
        { consumer_key: CONSUMER_KEY
        , consumer_secret: CONSUMER_SECRET
        , token: perm_token.oauth_token
        , token_secret: perm_token.oauth_token_secret
        }
      , url = 'https://api.twitter.com/1.1/users/show.json?'
      , params =
        { screen_name: perm_token.screen_name
        , user_id: perm_token.user_id
        }
      ;
    url += qs.stringify(params)
    request.get({url:url, oauth:oauth, json:true}, function (e, r, user) {
      console.log(user)
    })
  })
})
```

## Custom HTTP Headers

HTTP Headers, such as `User-Agent`, can be set in the `options` object.
In the example below, we call the github API to find out the number
of stars and forks for the request repository. This requires a
custom `User-Agent` header as well as https.

```javascript
var request = require('request');

var options = {
	url: 'https://api.github.com/repos/mikeal/request',
	headers: {
		'User-Agent': 'request'
	}
};

function callback(error, response, body) {
	if (!error && response.statusCode == 200) {
		var info = JSON.parse(body);
		console.log(info.stargazers_count + " Stars");
		console.log(info.forks_count + " Forks");
	}
}

request(options, callback);
```

## TLS/SSL Protocol

TLS/SSL Protocol options, such as `cert`, `key` and `passphrase`, can be
set in the `agentOptions` property of the `options` object.
In the example below, we call an API requires client side SSL certificate
(in PEM format) with passphrase protected private key (in PEM format) and disable the SSLv3 protocol:

```javascript
var fs = require('fs')
    , path = require('path')
    , certFile = path.resolve(__dirname, 'ssl/client.crt')
    , keyFile = path.resolve(__dirname, 'ssl/client.key')
    , request = require('request');

var options = {
    url: 'https://api.some-server.com/',
    agentOptions: {
        'cert': fs.readFileSync(certFile),
        'key': fs.readFileSync(keyFile),
        // Or use `pfx` property replacing `cert` and `key` when using private key, certificate and CA certs in PFX or PKCS12 format:
        // 'pfx': fs.readFileSync(pfxFilePath),
        'passphrase': 'password',
        'securityOptions': 'SSL_OP_NO_SSLv3'
    }
};

request.get(options);
```

It is able to force using SSLv3 only by specifying `secureProtocol`:

```javascript

request.get({
    url: 'https://api.some-server.com/',
    agentOptions: {
        'secureProtocol': 'SSLv3_method'
    }
});
```

## request(options, callback)

The first argument can be either a `url` or an `options` object. The only required option is `uri`; all others are optional.

* `uri` || `url` - fully qualified uri or a parsed url object from `url.parse()`
* `qs` - object containing querystring values to be appended to the `uri`
* `useQuerystring` - If true, use `querystring` to stringify and parse
  querystrings, otherwise use `qs` (default: `false`).  Set this option to
  `true` if you need arrays to be serialized as `foo=bar&foo=baz` instead of the
  default `foo[0]=bar&foo[1]=baz`.
* `method` - http method (default: `"GET"`)
* `headers` - http headers (default: `{}`)
* `body` - entity body for PATCH, POST and PUT requests. Must be a `Buffer` or `String`, unless `json` is `true`. If `json` is `true`, then `body` must be a JSON-serializable object.
* `form` - when passed an object or a querystring, this sets `body` to a querystring representation of value, and adds `Content-type: application/x-www-form-urlencoded` header. When passed no options, a `FormData` instance is returned (and is piped to request). See "Forms" section above.
* `formData` - Data to pass for a `multipart/form-data` request. See "Forms" section above.
* `multipart` - (experimental) Data to pass for a `multipart/related` request. See "Forms" section above
* `auth` - A hash containing values `user` || `username`, `pass` || `password`, and `sendImmediately` (optional).  See documentation above.
* `json` - sets `body` but to JSON representation of value and adds `Content-type: application/json` header.  Additionally, parses the response body as JSON.
* `multipart` - (experimental) array of objects which contains their own headers and `body` attribute. Sends `multipart/related` request. See example below.
* `preambleCRLF` - append a newline/CRLF before the boundary of your `multipart/form-data` request.
* `postambleCRLF` - append a newline/CRLF at the end of the boundary of your `multipart/form-data` request.
* `followRedirect` - follow HTTP 3xx responses as redirects (default: `true`). This property can also be implemented as function which gets `response` object as a single argument and should return `true` if redirects should continue or `false` otherwise.
* `followAllRedirects` - follow non-GET HTTP 3xx responses as redirects (default: `false`)
* `maxRedirects` - the maximum number of redirects to follow (default: `10`)
* `encoding` - Encoding to be used on `setEncoding` of response data. If `null`, the `body` is returned as a `Buffer`. Anything else **(including the default value of `undefined`)** will be passed as the [encoding](http://nodejs.org/api/buffer.html#buffer_buffer) parameter to `toString()` (meaning this is effectively `utf8` by default).
* `pool` - An object describing which agents to use for the request. If this option is omitted the request will use the global agent (as long as [your options allow for it](request.js#L747)). Otherwise, request will search the pool for your custom agent. If no custom agent is found, a new agent will be created and added to the pool.
  * A `maxSockets` property can also be provided on the `pool` object to set the max number of sockets for all agents created (ex: `pool: {maxSockets: Infinity}`).
* `timeout` - Integer containing the number of milliseconds to wait for a request to respond before aborting the request
* `proxy` - An HTTP proxy to be used. Supports proxy Auth with Basic Auth, identical to support for the `url` parameter (by embedding the auth info in the `uri`)
* `oauth` - Options for OAuth HMAC-SHA1 signing. See documentation above.
* `hawk` - Options for [Hawk signing](https://github.com/hueniverse/hawk). The `credentials` key must contain the necessary signing info, [see hawk docs for details](https://github.com/hueniverse/hawk#usage-example).
* `strictSSL` - If `true`, requires SSL certificates be valid. **Note:** to use your own certificate authority, you need to specify an agent that was created with that CA as an option.
* `agentOptions` - Object containing user agent options. See documentation above. **Note:** [see tls API doc for TLS/SSL options](http://nodejs.org/api/tls.html#tls_tls_connect_options_callback).

* `jar` - If `true` and `tough-cookie` is installed, remember cookies for future use (or define your custom cookie jar; see examples section)
* `aws` - `object` containing AWS signing information. Should have the properties `key`, `secret`. Also requires the property `bucket`, unless you’re specifying your `bucket` as part of the path, or the request doesn’t use a bucket (i.e. GET Services)
* `httpSignature` - Options for the [HTTP Signature Scheme](https://github.com/joyent/node-http-signature/blob/master/http_signing.md) using [Joyent's library](https://github.com/joyent/node-http-signature). The `keyId` and `key` properties must be specified. See the docs for other options.
* `localAddress` - Local interface to bind for network connections.
* `gzip` - If `true`, add an `Accept-Encoding` header to request compressed content encodings from the server (if not already present) and decode supported content encodings in the response.  **Note:** Automatic decoding of the response content is performed on the body data returned through `request` (both through the `request` stream and passed to the callback function) but is not performed on the `response` stream (available from the `response` event) which is the unmodified `http.IncomingMessage` object which may contain compressed data. See example below.
* `tunnel` - If `true`, then *always* use a tunneling proxy.  If
  `false` (default), then tunneling will only be used if the
  destination is `https`, or if a previous request in the redirect
  chain used a tunneling proxy.
* `proxyHeaderWhiteList` - A whitelist of headers to send to a
  tunneling proxy.


The callback argument gets 3 arguments:

1. An `error` when applicable (usually from [`http.ClientRequest`](http://nodejs.org/api/http.html#http_class_http_clientrequest) object)
2. An [`http.IncomingMessage`](http://nodejs.org/api/http.html#http_http_incomingmessage) object
3. The third is the `response` body (`String` or `Buffer`, or JSON object if the `json` option is supplied)

## Convenience methods

There are also shorthand methods for different HTTP METHODs and some other conveniences.

### request.defaults(options)

This method returns a wrapper around the normal request API that defaults to whatever options you pass in to it.

**Note:** You can call `.defaults()` on the wrapper that is returned from `request.defaults` to add/override defaults that were previously defaulted.

For example:
```javascript
//requests using baseRequest() will set the 'x-token' header
var baseRequest = request.defaults({
  headers: {x-token: 'my-token'}
})

//requests using specialRequest() will include the 'x-token' header set in
//baseRequest and will also include the 'special' header
var specialRequest = baseRequest.defaults({
  headers: {special: 'special value'}
})
```

### request.put

Same as `request()`, but defaults to `method: "PUT"`.

```javascript
request.put(url)
```

### request.patch

Same as `request()`, but defaults to `method: "PATCH"`.

```javascript
request.patch(url)
```

### request.post

Same as `request()`, but defaults to `method: "POST"`.

```javascript
request.post(url)
```

### request.head

Same as request() but defaults to `method: "HEAD"`.

```javascript
request.head(url)
```

### request.del

Same as `request()`, but defaults to `method: "DELETE"`.

```javascript
request.del(url)
```

### request.get

Same as `request()` (for uniformity).

```javascript
request.get(url)
```
### request.cookie

Function that creates a new cookie.

```javascript
request.cookie('key1=value1')
```
### request.jar

Function that creates a new cookie jar.

```javascript
request.jar()
```


## Examples:

```javascript
  var request = require('request')
    , rand = Math.floor(Math.random()*100000000).toString()
    ;
  request(
    { method: 'PUT'
    , uri: 'http://mikeal.iriscouch.com/testjs/' + rand
    , multipart:
      [ { 'content-type': 'application/json'
        ,  body: JSON.stringify({foo: 'bar', _attachments: {'message.txt': {follows: true, length: 18, 'content_type': 'text/plain' }}})
        }
      , { body: 'I am an attachment' }
      ]
    }
  , function (error, response, body) {
      if(response.statusCode == 201){
        console.log('document saved as: http://mikeal.iriscouch.com/testjs/'+ rand)
      } else {
        console.log('error: '+ response.statusCode)
        console.log(body)
      }
    }
  )
```

For backwards-compatibility, response compression is not supported by default.
To accept gzip-compressed responses, set the `gzip` option to `true`.  Note
that the body data passed through `request` is automatically decompressed
while the response object is unmodified and will contain compressed data if
the server sent a compressed response.

```javascript
  var request = require('request')
  request(
    { method: 'GET'
    , uri: 'http://www.google.com'
    , gzip: true
    }
  , function (error, response, body) {
      // body is the decompressed response body
      console.log('server encoded the data as: ' + (response.headers['content-encoding'] || 'identity'))
      console.log('the decoded data is: ' + body)
    }
  ).on('data', function(data) {
    // decompressed data as it is received
    console.log('decoded chunk: ' + data)
  })
  .on('response', function(response) {
    // unmodified http.IncomingMessage object
    response.on('data', function(data) {
      // compressed data as it is received
      console.log('received ' + data.length + ' bytes of compressed data')
    })
  })
```

Cookies are disabled by default (else, they would be used in subsequent requests). To enable cookies, set `jar` to `true` (either in `defaults` or `options`) and install `tough-cookie`.

```javascript
var request = request.defaults({jar: true})
request('http://www.google.com', function () {
  request('http://images.google.com')
})
```

To use a custom cookie jar (instead of `request`’s global cookie jar), set `jar` to an instance of `request.jar()` (either in `defaults` or `options`)

```javascript
var j = request.jar()
var request = request.defaults({jar:j})
request('http://www.google.com', function () {
  request('http://images.google.com')
})
```

OR

```javascript
// `npm install --save tough-cookie` before this works
var j = request.jar();
var cookie = request.cookie('key1=value1');
var url = 'http://www.google.com';
j.setCookie(cookie, url);
request({url: url, jar: j}, function () {
  request('http://images.google.com')
})
```

To inspect your cookie jar after a request

```javascript
var j = request.jar()
request({url: 'http://www.google.com', jar: j}, function () {
  var cookie_string = j.getCookieString(uri); // "key1=value1; key2=value2; ..."
  var cookies = j.getCookies(uri);
  // [{key: 'key1', value: 'value1', domain: "www.google.com", ...}, ...]
})
```

## Debugging

There are at least three ways to debug the operation of `request`:

1. Launch the node process like `NODE_DEBUG=request node script.js`
   (`lib,request,otherlib` works too).

2. Set `require('request').debug = true` at any time (this does the same thing
   as #1).

3. Use the [request-debug module](https://github.com/nylen/request-debug) to
   view request and response headers and bodies.