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// get an http/https agent
// This is necessary for the custom CA certs in http2,
// especially while juggling multiple different registries.
//
// When using http2, the agent key is just the CA setting,
// since it can manage socket pooling across different host:port
// options. When using the older implementation, the
// key is ca:host:port combination.
module.exports = getAgent
var npm = require("../npm.js")
, url = require("url")
, agents = {}
, isHttp2 = !!require("http").globalAgent
, registry = url.parse(npm.config.get("registry") || "")
, regCA = npm.config.get("ca")
function getAgent (remote) {
// If not doing https, then there's no CA cert to manage.
// on http2, this will use the default global agent.
// on http1, this is undefined, so it'll spawn based on
// host:port if necessary.
if (remote.protocol !== "https:") {
return require("http").globalAgent
}
if (typeof remote === "string") {
remote = url.parse(remote)
}
var ca
// if this is the registry, then use the configuration ca.
// otherwise, just use the built-in CAs that node has.
// todo: multi-registry support.
if (remote.hostname === registry.hostname
&& remote.port === registry.port) {
ca = regCA
}
// no CA, just use the default agent.
if (!ca) {
return require("https").globalAgent
}
var hostname = remote.hostname
, port = remote.port
, key = agentKey(hostname, port, ca)
return agents[key] = agents[key] || getAgent_(hostname, port, ca)
}
function getAgent_ (hostname, port, ca) {
var Agent = require("https").Agent
return new Agent({ host: hostname
, port: port
, ca: ca })
}
function agentKey (hostname, port, ca) {
return JSON.stringify(isHttp2 ? ca : [hostname, port, ca])
}
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