feat: improve experience around usage of custom API endpoints

src/packages/AbstractClient.ts

@@ -31,21 +31,46 @@ export abstract class AbstractClient {
       );
     }
 
-    if (this.willProxy()) {
+    let baseUrlString: string = this.options.global.url;
+    let proxyUrlString: string;
+
+    /**
+     * Check if the base URL provided is missing a protocol and warn in the console.
+     */
+    if (!baseUrlString.startsWith("http") && !baseUrlString.startsWith("ws")) {
+      console.warn(
+        `The base URL provided does not begin with http, https, ws, or wss and will default to https as standard.`
+      );
+    }
+
+    /**
+     * Applying proxy to base URL.
+     */
+    if (this.options.restProxy?.url) {
+      /**
+       * Prevent client using a real API key when using a proxy configuration.
+       */
       if (this.key !== "proxy") {
         throw new DeepgramError(
           `Do not attempt to pass any other API key than the string "proxy" when making proxied REST requests. Please ensure your proxy application is responsible for writing our API key to the Authorization header.`
         );
       }
 
-      this.baseUrl = this.resolveBaseUrl(this.options.restProxy?.url as string);
+      proxyUrlString = this.options.restProxy.url;
 
-      if (this.options.global.headers) {
-        this.options.global.headers["X-Deepgram-Proxy"] = this.options.global.url;
+      /**
+       * Check if the proxy URL provided is missing a protocol and warn in the console.
+       */
+      if (!proxyUrlString.startsWith("http") && !proxyUrlString.startsWith("ws")) {
+        console.warn(
+          `The proxy URL provided does not begin with http, https, ws, or wss and will default to https as standard.`
+        );
       }
-    } else {
-      this.baseUrl = this.resolveBaseUrl(this.options.global.url);
+
+      baseUrlString = proxyUrlString;
     }
+
+    this.baseUrl = this.resolveBaseUrl(baseUrlString);
   }
 
   protected resolveBaseUrl(url: string) {

src/packages/AbstractRestfulClient.ts

@@ -12,7 +12,7 @@ export abstract class AbstractRestfulClient extends AbstractClient {
   constructor(protected key: string, protected options: DeepgramClientOptions) {
     super(key, options);
 
-    if (isBrowser() && !this.willProxy()) {
+    if (isBrowser() && !this._willProxy()) {
       throw new DeepgramError(
         "Due to CORS we are unable to support REST-based API calls to our API from the browser. Please consider using a proxy, and including a `restProxy: { url: ''}` in your Deepgram client options."
       );
@@ -130,4 +130,10 @@ export abstract class AbstractRestfulClient extends AbstractClient {
   ): Promise<any> {
     return this._handleRequest(fetcher, "DELETE", url, headers, parameters);
   }
+
+  private _willProxy() {
+    const proxyUrl = this.options.restProxy?.url;
+
+    return !!proxyUrl;
+  }
 }