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
|
'use strict'
const LRU = require('lru-cache')
const url = require('url')
const isLambda = require('is-lambda')
const AGENT_CACHE = new LRU({ max: 50 })
let HttpsAgent
let HttpAgent
module.exports = getAgent
const getAgentTimeout = timeout =>
typeof timeout !== 'number' || !timeout ? 0 : timeout + 1
const getMaxSockets = maxSockets => maxSockets || 15
function getAgent (uri, opts) {
const parsedUri = new url.URL(typeof uri === 'string' ? uri : uri.url)
const isHttps = parsedUri.protocol === 'https:'
const pxuri = getProxyUri(parsedUri.href, opts)
// If opts.timeout is zero, set the agentTimeout to zero as well. A timeout
// of zero disables the timeout behavior (OS limits still apply). Else, if
// opts.timeout is a non-zero value, set it to timeout + 1, to ensure that
// the node-fetch-npm timeout will always fire first, giving us more
// consistent errors.
const agentTimeout = getAgentTimeout(opts.timeout)
const agentMaxSockets = getMaxSockets(opts.maxSockets)
const key = [
`https:${isHttps}`,
pxuri
? `proxy:${pxuri.protocol}//${pxuri.host}:${pxuri.port}`
: '>no-proxy<',
`local-address:${opts.localAddress || '>no-local-address<'}`,
`strict-ssl:${isHttps ? !!opts.strictSSL : '>no-strict-ssl<'}`,
`ca:${(isHttps && opts.ca) || '>no-ca<'}`,
`cert:${(isHttps && opts.cert) || '>no-cert<'}`,
`key:${(isHttps && opts.key) || '>no-key<'}`,
`timeout:${agentTimeout}`,
`maxSockets:${agentMaxSockets}`
].join(':')
if (opts.agent != null) { // `agent: false` has special behavior!
return opts.agent
}
// keep alive in AWS lambda makes no sense
const lambdaAgent = !isLambda ? null
: isHttps ? require('https').globalAgent
: require('http').globalAgent
if (isLambda && !pxuri) {
return lambdaAgent
}
if (AGENT_CACHE.peek(key)) {
return AGENT_CACHE.get(key)
}
if (pxuri) {
const pxopts = isLambda ? {
...opts,
agent: lambdaAgent
} : opts
const proxy = getProxy(pxuri, pxopts, isHttps)
AGENT_CACHE.set(key, proxy)
return proxy
}
if (!HttpsAgent) {
HttpAgent = require('agentkeepalive')
HttpsAgent = HttpAgent.HttpsAgent
}
const agent = isHttps ? new HttpsAgent({
maxSockets: agentMaxSockets,
ca: opts.ca,
cert: opts.cert,
key: opts.key,
localAddress: opts.localAddress,
rejectUnauthorized: opts.strictSSL,
timeout: agentTimeout
}) : new HttpAgent({
maxSockets: agentMaxSockets,
localAddress: opts.localAddress,
timeout: agentTimeout
})
AGENT_CACHE.set(key, agent)
return agent
}
function checkNoProxy (uri, opts) {
const host = new url.URL(uri).hostname.split('.').reverse()
let noproxy = (opts.noProxy || getProcessEnv('no_proxy'))
if (typeof noproxy === 'string') {
noproxy = noproxy.split(/\s*,\s*/g)
}
return noproxy && noproxy.some(no => {
const noParts = no.split('.').filter(x => x).reverse()
if (!noParts.length) { return false }
for (let i = 0; i < noParts.length; i++) {
if (host[i] !== noParts[i]) {
return false
}
}
return true
})
}
module.exports.getProcessEnv = getProcessEnv
function getProcessEnv (env) {
if (!env) {
return
}
let value
if (Array.isArray(env)) {
for (const e of env) {
value = process.env[e] ||
process.env[e.toUpperCase()] ||
process.env[e.toLowerCase()]
if (typeof value !== 'undefined') { break }
}
}
if (typeof env === 'string') {
value = process.env[env] ||
process.env[env.toUpperCase()] ||
process.env[env.toLowerCase()]
}
return value
}
module.exports.getProxyUri = getProxyUri
function getProxyUri (uri, opts) {
const protocol = new url.URL(uri).protocol
const proxy = opts.proxy ||
(
protocol === 'https:' &&
getProcessEnv('https_proxy')
) ||
(
protocol === 'http:' &&
getProcessEnv(['https_proxy', 'http_proxy', 'proxy'])
)
if (!proxy) { return null }
const parsedProxy = (typeof proxy === 'string') ? new url.URL(proxy) : proxy
return !checkNoProxy(uri, opts) && parsedProxy
}
const getAuth = u =>
u.username && u.password ? `${u.username}:${u.password}`
: u.username ? u.username
: null
const getPath = u => u.pathname + u.search + u.hash
let HttpProxyAgent
let HttpsProxyAgent
let SocksProxyAgent
module.exports.getProxy = getProxy
function getProxy (proxyUrl, opts, isHttps) {
const popts = {
host: proxyUrl.hostname,
port: proxyUrl.port,
protocol: proxyUrl.protocol,
path: getPath(proxyUrl),
auth: getAuth(proxyUrl),
ca: opts.ca,
cert: opts.cert,
key: opts.key,
timeout: getAgentTimeout(opts.timeout),
localAddress: opts.localAddress,
maxSockets: getMaxSockets(opts.maxSockets),
rejectUnauthorized: opts.strictSSL
}
if (proxyUrl.protocol === 'http:' || proxyUrl.protocol === 'https:') {
if (!isHttps) {
if (!HttpProxyAgent) {
HttpProxyAgent = require('http-proxy-agent')
}
return new HttpProxyAgent(popts)
} else {
if (!HttpsProxyAgent) {
HttpsProxyAgent = require('https-proxy-agent')
}
return new HttpsProxyAgent(popts)
}
} else if (proxyUrl.protocol.startsWith('socks')) {
if (!SocksProxyAgent) {
SocksProxyAgent = require('socks-proxy-agent')
}
return new SocksProxyAgent(popts)
} else {
throw Object.assign(
new Error(`unsupported proxy protocol: '${proxyUrl.protocol}'`),
{
url: proxyUrl.href
}
)
}
}
|
