Add FETCH_PROXY environment variable for CLI

README.md

@@ -30,6 +30,7 @@ npx @humanwhocodes/proxy-fetch-server
 
 The server is configured using environment variables:
 
+- **FETCH_PROXY** (conditionally required) - A universal proxy URI that will be used for both HTTP and HTTPS requests. When set, this supersedes both `http_proxy` and `https_proxy`, allowing you to configure the proxy just for the fetch request rather than the whole process.
 - **http_proxy** (conditionally required) - The proxy server to use for requests that use the http protocol
 - **https_proxy** (conditionally required) - The proxy server to use for requests that use the https protocol
 - **no_proxy** (optional) - A comma-delimited list of hostnames or hostname:port entries that should bypass using the configured proxy completely. If a hostname begins with a dot (.) then it applies to all subdomains. For instance `.humanwhocodes.com` applies to `humanwhocodes.com`, `www.humanwhocodes.com`, `newsletter.humanwhocodes.com`, etc.
@@ -38,7 +39,7 @@ The server is configured using environment variables:
 - **PROXY_TOKEN** (optional) - The token that the proxy expects
 - **PROXY_TOKEN_TYPE** (optional) - The token type prefix for the proxy (default: "Bearer")
 
-Either `http_proxy` or `https_proxy` is required.
+Either `FETCH_PROXY` or at least one of `http_proxy` and `https_proxy` is required.
 
 Example:
 
@@ -53,6 +54,18 @@ PROXY_TOKEN_TYPE=Bearer \
 npx @humanwhocodes/proxy-fetch-server
 ```
 
+Or, using `FETCH_PROXY` to set both HTTP and HTTPS proxy to the same value:
+
+```shell
+FETCH_PROXY=http://proxy.example.com:8080 \
+no_proxy=localhost,.internal.com \
+PROXY_FETCH_KEY=my-secret-key \
+PORT=3000 \
+PROXY_TOKEN=proxy-secret \
+PROXY_TOKEN_TYPE=Bearer \
+npx @humanwhocodes/proxy-fetch-server
+```
+
 ### Making Requests
 
 Send a POST request to the root endpoint (`/`) with:

src/server.js

@@ -14,8 +14,9 @@ import { createApp } from "./app.js";
 // Get configuration from environment variables
 const key = process.env.PROXY_FETCH_KEY;
 const port = parseInt(process.env.PORT || "8080", 10);
-const httpProxy = process.env.http_proxy;
-const httpsProxy = process.env.https_proxy;
+const fetchProxyUri = process.env.FETCH_PROXY;
+const httpProxy = fetchProxyUri || process.env.http_proxy;
+const httpsProxy = fetchProxyUri || process.env.https_proxy;
 const noProxyEnv = process.env.no_proxy;
 const proxyToken = process.env.PROXY_TOKEN;
 const proxyTokenType = process.env.PROXY_TOKEN_TYPE;
@@ -28,7 +29,7 @@ const noProxy = noProxyEnv
 // Validate required configuration
 if (!httpProxy && !httpsProxy) {
 	console.error(
-		"Error: Either http_proxy or https_proxy environment variable is required",
+		"Error: Either FETCH_PROXY, http_proxy, or https_proxy environment variable is required",
 	);
 	process.exit(1);
 }