feat: combine reading spec from url

src/utils/readSpec.ts

@@ -1,13 +1,12 @@
 import { readSpecFromDisk } from './readSpecFromDisk';
-import { readSpecFromHttp } from './readSpecFromHttp';
-import { readSpecFromHttps } from './readSpecFromHttps';
+import { readSpecFromUrl } from './readSpecFromUrl';
 
 export const readSpec = async (input: string): Promise<string> => {
     if (input.startsWith('https://')) {
-        return await readSpecFromHttps(input);
+        return await readSpecFromUrl(input, 'https');
     }
     if (input.startsWith('http://')) {
-        return await readSpecFromHttp(input);
+        return await readSpecFromUrl(input, 'http');
     }
     return await readSpecFromDisk(input);
 };

src/utils/readSpecFromUrl.ts

@@ -0,0 +1,28 @@
+import http from 'http';
+import https from 'https';
+
+/**
+ * Download the spec file from a url resource
+ * @param url
+ * @param protocol
+ */
+export const readSpecFromUrl = async (url: string, protocol: 'http' | 'https'): Promise<string> =>
+    new Promise<string>((resolve, reject) => {
+        const cb = (response: http.IncomingMessage) => {
+            let body = '';
+            response.on('data', chunk => {
+                body += chunk;
+            });
+            response.on('end', () => {
+                resolve(body);
+            });
+            response.on('error', () => {
+                reject(`Could not read OpenApi spec: "${url}"`);
+            });
+        };
+        if (protocol === 'http') {
+            http.get(url, cb);
+        } else if (protocol === 'https') {
+            https.get(url, cb);
+        }
+    });