- use resolveUrl to avoid duplicate of '/'

docker-compose.yml

@@ -13,6 +13,7 @@ services:
       #USE_PROXY_AGENT: true
       #TO_PROXY: true
       # First Gateway
+      GATEWAY_IS_SINGLE: "true"
       GATEWAY_1_HOST: <yourproject>.api.xxx.sg
       GATEWAY_1_SIGNING_HOST: <yourproject>.e.api.xxx.sg
       GATEWAY_1_PORT: 443

src/handler.ts

@@ -7,7 +7,7 @@ import {
   MODE,
 } from './constants';
 import {IConfig} from './types';
-import {printOpts} from './utils';
+import {printOpts, resolveUrl} from './utils';
 
 export const sign = ({
   type,
@@ -69,7 +69,9 @@ export const firstGateSignature = (req: http.IncomingMessage, config: IConfig):
     gateway1Passphrase,
   } = config;
 
-  const urlPath = `https://${gateway1SigningHost}:${gateway1Port}/${gateway1UrlPrefix}/${gateway2UrlPrefix}${url}`;
+  const urlPath = resolveUrl(`https://${gateway1SigningHost}:${gateway1Port}`,
+      gateway1UrlPrefix,
+      gateway2UrlPrefix, url);
   return sign({
     type: gateway1Type,
     secret: gateway1Secret,
@@ -99,7 +101,7 @@ export const secondGateSignature = (req: http.IncomingMessage, config: IConfig):
     gateway2Passphrase,
   } = config;
 
-  const urlPath = `https://${gateway2SigningHost}:${gateway2Port}/${gateway2UrlPrefix}${url}`;
+  const urlPath = resolveUrl(`https://${gateway2SigningHost}:${gateway2Port}`, gateway2UrlPrefix, url);
   return sign({
     type: gateway2Type,
     secret: gateway2Secret,

src/utils/index.ts

@@ -1,4 +1,6 @@
-import  {  createHash  }  from  "crypto" ;
+import { createHash } from "crypto";
+import { join } from 'path';
+import { parse, resolve } from 'url';
 
 export const generateSHA512Hash = (data: string): string =>
   createHash('sha512').update(data || '').digest('hex');
@@ -29,3 +31,18 @@ export const printOpts = (opts: any): void =>{
   console.log("Printing opts:", tempOpts);
 };
 
+export const resolveUrl = (urlStub: string, ...urlPathToAdd: string[]): string => {
+  const urlStubObject = parse(urlStub);
+  const {protocol, hostname, port} = urlStubObject;
+  switch (protocol) {
+    case 'http:': // tslint:disable-line no-http-string
+    case 'https:':
+    case 'ftp:':
+      break;
+    default:
+      throw new Error('Protocol was not specified. Prefix :urlStub with "http://" or "https://"');
+  }
+  const hostStub = `${protocol}//${hostname}${port ? `:${port}` : ''}/`;
+  const urlStubPath = urlStubObject.pathname || '/';
+  return resolve(hostStub, join(urlStubPath, ...urlPathToAdd));
+};