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This works around VS Code having no support for no_proxy except through environment variables.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| // This file is copied from proxy-from-env with added support to use something | ||
| // other than environment variables. | ||
|
|
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| import { parse as parseUrl } from "url" | ||
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|
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| const DEFAULT_PORTS: Record<string, number> = { | ||
| ftp: 21, | ||
| gopher: 70, | ||
| http: 80, | ||
| https: 443, | ||
| ws: 80, | ||
| wss: 443, | ||
| } | ||
|
|
||
| /** | ||
| * @param {string|object} url - The URL, or the result from url.parse. | ||
| * @return {string} The URL of the proxy that should handle the request to the | ||
| * given URL. If no proxy is set, this will be an empty string. | ||
| */ | ||
| export function getProxyForUrl( | ||
| url: string, | ||
| httpProxy: string | null | undefined, | ||
| noProxy: string | null | undefined, | ||
| ): string { | ||
| const parsedUrl = typeof url === "string" ? parseUrl(url) : url || {} | ||
| let proto = parsedUrl.protocol | ||
| let hostname = parsedUrl.host | ||
| const portRaw = parsedUrl.port | ||
| if (typeof hostname !== "string" || !hostname || typeof proto !== "string") { | ||
| return "" // Don't proxy URLs without a valid scheme or host. | ||
| } | ||
|
|
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| proto = proto.split(":", 1)[0] | ||
| // Stripping ports in this way instead of using parsedUrl.hostname to make | ||
| // sure that the brackets around IPv6 addresses are kept. | ||
| hostname = hostname.replace(/:\d*$/, "") | ||
| const port = (portRaw && parseInt(portRaw)) || DEFAULT_PORTS[proto] || 0 | ||
| if (!shouldProxy(hostname, port, noProxy)) { | ||
| return "" // Don't proxy URLs that match NO_PROXY. | ||
| } | ||
|
|
||
| let proxy = | ||
| httpProxy || | ||
| getEnv("npm_config_" + proto + "_proxy") || | ||
| getEnv(proto + "_proxy") || | ||
| getEnv("npm_config_proxy") || | ||
| getEnv("all_proxy") | ||
| if (proxy && proxy.indexOf("://") === -1) { | ||
| // Missing scheme in proxy, default to the requested URL's scheme. | ||
| proxy = proto + "://" + proxy | ||
| } | ||
| return proxy | ||
| } | ||
|
|
||
| /** | ||
| * Determines whether a given URL should be proxied. | ||
| * | ||
| * @param {string} hostname - The host name of the URL. | ||
| * @param {number} port - The effective port of the URL. | ||
| * @returns {boolean} Whether the given URL should be proxied. | ||
| * @private | ||
| */ | ||
| function shouldProxy(hostname: string, port: number, noProxy: string | null | undefined): boolean { | ||
| const NO_PROXY = noProxy || (getEnv("npm_config_no_proxy") || getEnv("no_proxy")).toLowerCase() | ||
| if (!NO_PROXY) { | ||
| return true // Always proxy if NO_PROXY is not set. | ||
| } | ||
| if (NO_PROXY === "*") { | ||
| return false // Never proxy if wildcard is set. | ||
| } | ||
|
|
||
| return NO_PROXY.split(/[,\s]/).every(function (proxy) { | ||
| if (!proxy) { | ||
| return true // Skip zero-length hosts. | ||
| } | ||
| const parsedProxy = proxy.match(/^(.+):(\d+)$/) | ||
| let parsedProxyHostname = parsedProxy ? parsedProxy[1] : proxy | ||
| const parsedProxyPort = parsedProxy ? parseInt(parsedProxy[2]) : 0 | ||
| if (parsedProxyPort && parsedProxyPort !== port) { | ||
| return true // Skip if ports don't match. | ||
| } | ||
|
|
||
| if (!/^[.*]/.test(parsedProxyHostname)) { | ||
| // No wildcards, so stop proxying if there is an exact match. | ||
| return hostname !== parsedProxyHostname | ||
| } | ||
|
|
||
| if (parsedProxyHostname.charAt(0) === "*") { | ||
| // Remove leading wildcard. | ||
| parsedProxyHostname = parsedProxyHostname.slice(1) | ||
| } | ||
| // Stop proxying if the hostname ends with the no_proxy host. | ||
| return !hostname.endsWith(parsedProxyHostname) | ||
| }) | ||
| } | ||
|
|
||
| /** | ||
| * Get the value for an environment variable. | ||
| * | ||
| * @param {string} key - The name of the environment variable. | ||
| * @return {string} The value of the environment variable. | ||
| * @private | ||
| */ | ||
| function getEnv(key: string): string { | ||
| return process.env[key.toLowerCase()] || process.env[key.toUpperCase()] || "" | ||
| } |
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