File size: 4,175 Bytes
98077a8 | 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 | import type { ProviderEnv } from "../types.ts";
import { getProviderEnvValue } from "./provider-env.ts";
const DEFAULT_PROXY_PORTS: Record<string, number> = {
ftp: 21,
gopher: 70,
http: 80,
https: 443,
ws: 80,
wss: 443,
};
function getProxyEnv(key: string, env?: ProviderEnv): string {
const lowercaseKey = key.toLowerCase();
const uppercaseKey = key.toUpperCase();
return (
env?.[lowercaseKey] ||
env?.[uppercaseKey] ||
getProviderEnvValue(lowercaseKey) ||
getProviderEnvValue(uppercaseKey) ||
""
);
}
function parseProxyTargetUrl(targetUrl: string | URL): URL | undefined {
if (targetUrl instanceof URL) {
return targetUrl;
}
try {
return new URL(targetUrl);
} catch {
return undefined;
}
}
function stripBrackets(host: string): string {
return host.startsWith("[") && host.endsWith("]") ? host.slice(1, -1) : host;
}
function parseNoProxyEntry(entry: string): { host: string; port: number } | undefined {
const trimmed = entry.trim().toLowerCase();
if (!trimmed) return undefined;
if (trimmed.startsWith("[")) {
const closingBracket = trimmed.indexOf("]");
if (closingBracket !== -1) {
const host = trimmed.slice(1, closingBracket);
const rest = trimmed.slice(closingBracket + 1);
if (rest.startsWith(":")) {
const port = Number.parseInt(rest.slice(1), 10);
return { host, port: Number.isNaN(port) ? 0 : port };
}
return { host, port: 0 };
}
}
if (trimmed.includes(":") && trimmed.split(":").length > 2) {
return { host: trimmed, port: 0 };
}
const colonIndex = trimmed.lastIndexOf(":");
if (colonIndex !== -1 && colonIndex === trimmed.indexOf(":")) {
const host = trimmed.slice(0, colonIndex);
const port = Number.parseInt(trimmed.slice(colonIndex + 1), 10);
if (!Number.isNaN(port)) {
return { host, port };
}
}
return { host: trimmed, port: 0 };
}
function shouldProxyHostname(hostname: string, port: number, env?: ProviderEnv): boolean {
const noProxy = getProxyEnv("no_proxy", env).toLowerCase();
if (!noProxy) {
return true;
}
if (noProxy === "*") {
return false;
}
const normalizedTargetHost = stripBrackets(hostname.toLowerCase());
return noProxy.split(/[,\s]/).every((entry) => {
const parsed = parseNoProxyEntry(entry);
if (!parsed) {
return true;
}
if (parsed.port && parsed.port !== port) {
return true;
}
let domain = stripBrackets(parsed.host);
if (domain.startsWith("*.")) {
domain = domain.slice(2);
} else if (domain.startsWith(".") || domain.startsWith("*")) {
domain = domain.slice(1);
}
if (!domain) {
return true;
}
if (normalizedTargetHost === domain) {
return false;
}
if (normalizedTargetHost.endsWith(`.${domain}`)) {
return false;
}
return true;
});
}
function getProxyForUrl(targetUrl: string | URL, env?: ProviderEnv): string {
const parsedUrl = parseProxyTargetUrl(targetUrl);
if (!parsedUrl?.protocol || !parsedUrl.host) {
return "";
}
const protocol = parsedUrl.protocol.split(":", 1)[0]!;
const hostname = stripBrackets(parsedUrl.hostname || parsedUrl.host.replace(/:\d*$/, ""));
const port = Number.parseInt(parsedUrl.port, 10) || DEFAULT_PROXY_PORTS[protocol] || 0;
if (!shouldProxyHostname(hostname, port, env)) {
return "";
}
let proxy = getProxyEnv(`${protocol}_proxy`, env) || getProxyEnv("all_proxy", env);
if (proxy && !proxy.includes("://")) {
proxy = `${protocol}://${proxy}`;
}
return proxy;
}
export const UNSUPPORTED_PROXY_PROTOCOL_MESSAGE =
"Unsupported proxy protocol. SOCKS and PAC proxy URLs are not supported; use an HTTP or HTTPS proxy URL.";
export function resolveHttpProxyUrlForTarget(targetUrl: string | URL, env?: ProviderEnv): URL | undefined {
const proxy = getProxyForUrl(targetUrl, env);
if (!proxy) {
return undefined;
}
let proxyUrl: URL;
try {
proxyUrl = new URL(proxy);
} catch (error) {
throw new Error(
`Invalid proxy URL ${JSON.stringify(proxy)}: ${error instanceof Error ? error.message : String(error)}`,
);
}
if (proxyUrl.protocol !== "http:" && proxyUrl.protocol !== "https:") {
throw new Error(`${UNSUPPORTED_PROXY_PROTOCOL_MESSAGE} Got ${proxyUrl.protocol}`);
}
return proxyUrl;
}
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