| 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248 |
1
1
1
1
1
22
1
85
85
85
85
154
154
85
1
5
80
80
80
80
80
80
1
2
51
51
1
2
27
25
1
2
2
4
4
1
3
2
1
5
3
1
3
3
3
2
3
1
35
10
25
21
5
16
1
20
11
10
10
10
10
10
10
10
11
1
22
22
22
22
22
1
44
42
2
| /*───────────────────────────────────────────────────────────────────────────*\
│ Copyright (C) 2014 eBay Software Foundation │
│ │
│ ,'""`. │
│ / _ _ \ Licensed under the Apache License, Version 2.0 (the "License"); │
│ |(@)(@)| you may not use this file except in compliance with the License. │
│ ) __ ( You may obtain a copy of the License at │
│ /,'))((`.\ │
│(( (( )) )) http://www.apache.org/licenses/LICENSE-2.0 │
│ `\ `)(' /' │
│ │
│ Unless required by applicable law or agreed to in writing, software │
│ distributed under the License is distributed on an "AS IS" BASIS, │
│ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. │
│ See the License for the specific language governing permissions and │
│ limitations under the License. │
\*───────────────────────────────────────────────────────────────────────────*/
'use strict';
var url = require('url');
var slice, clone, INVALID_HEADERS;
slice = clone = Function.prototype.call.bind(Array.prototype.slice);
INVALID_HEADERS = ['content-length', 'date'];
/**
* Determines if the header is `valid` or `invalid`, returning
* a boolean value which reflect said determination.
* @param header the name of the header to test
* @returns {boolean} true if the header is valid, or false if not.
*/
exports.isValidHeader = function isValidHeader(header) {
return !~INVALID_HEADERS.indexOf(header);
};
/**
* Adds the properties to the provided object as defined
* by var args.
*
* var obj = namespace({}, 'foo', 'bar', 'baz');
* // obj = { foo: { bar : { baz: {} } }
* @returns {*} the provided object
*/
exports.namespace = function namespace(/*obj, props...*/) {
var args, dest, prop;
args = clone(arguments);
dest = args.shift();
while (args.length) {
prop = args.shift();
dest = dest[prop] || (dest[prop] = {});
}
return dest;
};
/**
* Creates a curried function that creates, if necessary,
* an object hierarchy prior to providing the object
* and property name to the provided callback.
* @param dest
* @param fn
* @returns {Function}
*/
exports.ns = function ns(dest, fn) {
return function (name) {
var props, obj;
props = name.split(':');
props.unshift(dest);
name = props.pop();
obj = exports.namespace.apply(null, props);
fn(obj, name);
};
};
/**
* Creates a curried function that ensures a property in
* an object hierarchy exists prior to passing it to the
* provided callback. If one doesn't exists it is created.
* @param dest
* @param fn
* @returns {*}
*/
exports.init = function init(dest, fn) {
return exports.ns(dest, function (obj, prop) {
obj[prop] = (typeof obj[prop] !== 'undefined') ? obj[prop] : 0;
fn(obj, prop);
});
};
/**
* Creates a curried function that ensures a property exists
* in an object prior to passing it to the provided callback.
* @param dest
* @param fn
* @returns {*}
*/
exports.maybe = function maybe(dest, fn) {
return exports.ns(dest, function (obj, name) {
if (obj[name] !== undefined) {
fn(obj, name);
}
});
};
/**
* Traverses an object hierarchy, invoking the provided function
* with any non-object value and assigns the result of the function
* invocation to the property.
* @param obj
* @param fn
* @returns {{}}
*/
exports.map = function map(obj, fn) {
var dest = {};
Object.keys(obj).forEach(function (prop) {
var value = obj[prop];
if (typeof value === 'object') {
dest[prop] = map(value, fn);
} else {
dest[prop] = fn(value);
}
});
return dest;
};
/**
* Adds the length of all properties in the given object.
* @param obj
* @returns {Object}
*/
exports.sum = function sum(obj) {
return Object.keys(obj).reduce(function (prev, curr) {
return prev + obj[curr].length;
}, 0);
};
/**
* Parses the provided string as JSON. If successful, returns
* the parsed JSON object, otherwise the error if unsuccessful.
* @param data
* @returns {*}
*/
exports.tryParse = function tryParse(data) {
var obj;
try {
obj = JSON.parse(data);
}
catch (e) {
obj = e;
}
return obj;
};
/**
* Transforms all properties within an object hierarchy using the
* provided function
* @param obj the object to travers
* @param prop the property to locate
* @param fn the transformer implementation
*/
exports.transform = function transform(obj, prop, fn) {
if (typeof obj !== 'object' || obj === null) {
return;
}
Object.keys(obj).forEach(function (key) {
if (key === prop) {
obj[key] = fn(obj[key]);
} else {
transform(obj[key], prop, fn);
}
});
};
/**
* Creates a function that rewrites paths using the provided host and port
* @protocol the protocol to use when rewriting
* @param host the host to use when rewriting
* @param registry an Url object of the registry to use
* @returns {Function} a fn which accepts the path to rewrite and returns the rewritten path.
*/
exports.rewriter = function rewriter(host, registry) {
return function rewrite(path) {
if (typeof path === 'string') {
path = url.parse(path);
path.pathname = path.pathname.replace(registry.pathname, '') || '/';
path.protocol = host.protocol;
path.hostname = host.hostname;
path.port = host.port;
path.host = undefined;
path = path.format();
}
return path;
};
};
/**
* Extracts the *client* request host information from the request (i.e. takes into account x-forwarded-proto)
* This allows us to know the protocol, host, and port of the originating request.
* @param request
* @returns {{protocol: *, hostname: *, port: *}}
*/
exports.hostInfo = function hostInfo(request) {
var protocol, uri;
protocol = request.headers['x-forwarded-proto'] || request.server.info.protocol;
protocol = exports.suffix(protocol, ':');
uri = url.parse(protocol + '//' + request.info.host);
return {
'protocol': uri.protocol,
'hostname': uri.hostname,
'port': uri.port
};
};
/**
* Ensures the provided suffix is at the end of a string,
* and if not adds it.
* @param str
* @param chars
*/
exports.suffix = function suffix(str, chars) {
if (typeof(str) === 'string' && typeof(chars) === 'string') {
return str.slice(-chars.length) === chars ? str : str + chars;
}
return str;
};
|