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'use strict'
var querystring = require('querystring')
, qs = require('qs')
, caseless = require('caseless')
, uuid = require('node-uuid')
, oauth = require('oauth-sign')
exports.buildParams = function (_oauth, uri, method, query, form, qsLib) {
var oa = {}
for (var i in _oauth) {
oa['oauth_' + i] = _oauth[i]
}
if (!oa.oauth_version) {
oa.oauth_version = '1.0'
}
if (!oa.oauth_timestamp) {
oa.oauth_timestamp = Math.floor( Date.now() / 1000 ).toString()
}
if (!oa.oauth_nonce) {
oa.oauth_nonce = uuid().replace(/-/g, '')
}
if (!oa.oauth_signature_method) {
oa.oauth_signature_method = 'HMAC-SHA1'
}
var consumer_secret_or_private_key = oa.oauth_consumer_secret || oa.oauth_private_key
delete oa.oauth_consumer_secret
delete oa.oauth_private_key
var token_secret = oa.oauth_token_secret
delete oa.oauth_token_secret
var realm = oa.oauth_realm
delete oa.oauth_realm
delete oa.oauth_transport_method
var baseurl = uri.protocol + '//' + uri.host + uri.pathname
var params = qsLib.parse([].concat(query, form, qsLib.stringify(oa)).join('&'))
oa.oauth_signature = oauth.sign(
oa.oauth_signature_method,
method,
baseurl,
params,
consumer_secret_or_private_key,
token_secret)
if (realm) {
oa.realm = realm
}
return oa
}
exports.concatParams = function (oa, sep, wrap) {
wrap = wrap || ''
var params = Object.keys(oa).filter(function (i) {
return i !== 'realm' && i !== 'oauth_signature'
}).sort()
if (oa.realm) {
params.splice(0, 1, 'realm')
}
params.push('oauth_signature')
return params.map(function (i) {
return i + '=' + wrap + oauth.rfc3986(oa[i]) + wrap
}).join(sep)
}
exports.oauth = function (args) {
var uri = args.uri || {}
, method = args.method || ''
, headers = caseless(args.headers)
, body = args.body || ''
, _oauth = args.oauth || {}
, qsLib = args.qsLib || qs
var form
, query
, contentType = headers.get('content-type') || ''
, formContentType = 'application/x-www-form-urlencoded'
, transport = _oauth.transport_method || 'header'
if (contentType.slice(0, formContentType.length) === formContentType) {
contentType = formContentType
form = body
}
if (uri.query) {
query = uri.query
}
if (transport === 'body' && (method !== 'POST' || contentType !== formContentType)) {
throw new Error('oauth: transport_method of \'body\' requires \'POST\' ' +
'and content-type \'' + formContentType + '\'')
}
var oa = this.buildParams(_oauth, uri, method, query, form, qsLib)
var data
switch (transport) {
case 'header':
data = 'OAuth ' + this.concatParams(oa, ',', '"')
break
case 'query':
data = (query ? '&' : '?') + this.concatParams(oa, '&')
break
case 'body':
data = (form ? form + '&' : '') + this.concatParams(oa, '&')
break
default:
throw new Error('oauth: transport_method invalid')
}
return {oauth:data, transport:transport}
}