request input validation

request_input.js

var request = require('request')
  , db = 'http://localhost:5984/my_db'

request.put(db, function(er, res) {
  // This never happens. You need a body in an options object.
})

request.put({uri:db, body:'blah'}, function(er, res) {
  // This is the normal API. It's fine.
})

request({PUT:db, body:'blah'}, function(er, res) {
  // Slightly shorter. I like it, but reasonable people could disagree.
})

request({GET:db, PUT:db, body:'blah'}, function(er, res) {
  // Mikeal says it opens the door to bad code like this.
  // My solution would be for this to throw an error.
})

request.get({method:'PUT', body:'blah'}, function(er, res) {
  // This works today but it is equally stupid. You have to read
  // the code to know what you'll get. for request.get(), you get
  // the method in the options. For .post(), .put(), etc., the options
  // method is ignored.
  //
  // So this should probably throw too while we're at it.
})