1 files changed, 62 insertions, 0 deletions
diff --git a/deps/npm/lib/utils/get-agent.js b/deps/npm/lib/utils/get-agent.js
new file mode 100644
index 0000000000..b4a5738d2d
--- /dev/null
+++ b/deps/npm/lib/utils/get-agent.js
@@ -0,0 +1,62 @@
+// 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])
+}