Added support to multiple query params.

Author: sravan-archilogic

src/request.spec.js

@@ -22,11 +22,13 @@ describe('Request object', () => {
       pathParameters: {},
       queryStringParameters: {
         a: '1',
-        b: '2'
+        b: '2',
+        'c[]': 'name'
       },
       multiValueQueryStringParameters: {
         a: ['1'],
-        b: ['1', '2']
+        b: ['1', '2'],
+        'c[]': ['-firstName', 'lastName']
       },
       stageVariables: {},
       requestContext: {},
@@ -43,7 +45,8 @@ describe('Request object', () => {
   it('should read first value of query parameter with multiple values', () => {
     const request = new Request(event)
 
-    expect(request.query.b).toEqual('1')
+    expect(request.query.b).toEqual(['1', '2'])
+    expect(request.query.c).toEqual(['-firstName', 'lastName'])
   })
 
   it('should read header', () => {

src/request.ts

@@ -14,7 +14,7 @@ export class Request extends Readable {
   headers: { [k: string]: string }
   hostname: string | null
   method: string
-  query: { [name: string]: string } | null
+  query: { [name: string]: string | string[] } | null
   path: string
   url: string
   params: { [name: string]: string } | null
@@ -60,10 +60,11 @@ export class Request extends Readable {
     this.query = Object.keys(event.multiValueQueryStringParameters || {}).reduce(
       (queryParams, key) => {
         const value = event.multiValueQueryStringParameters![key] // cannot be null at this point
-        queryParams[key] = value[0]
+        const _key = key.replace(/\[\]/, '')
+        queryParams[_key] = value.length > 1 ? value : value[0]
         return queryParams
       },
-      {} as { [name: string]: string }
+      {} as { [name: string]: string | string[] }
     )
 
     this.path = event.path || ''