[TypeScript][Node] support for overriding HTTP request headers

This approach is inspired by the typescript-fetch implementation.

Fixes #9035

Author: Silas Boyd-Wickizer

modules/swagger-codegen/src/main/resources/typescript-node/api.mustache

@@ -371,8 +371,9 @@ export class {{classname}} {
      {{#allParams}}
      * @param {{paramName}} {{description}}
      {{/allParams}}
+     * @param {*} [options] Override http request options.
      */
-    public {{nickname}} ({{#allParams}}{{paramName}}{{^required}}?{{/required}}: {{{dataType}}}{{#hasMore}}, {{/hasMore}}{{/allParams}}) : Promise<{ response: http.{{#supportsES6}}IncomingMessage{{/supportsES6}}{{^supportsES6}}ClientResponse{{/supportsES6}}; {{#returnType}}body: {{{returnType}}}; {{/returnType}}{{^returnType}}body?: any; {{/returnType}} }> {
+    public {{nickname}} ({{#allParams}}{{paramName}}{{^required}}?{{/required}}: {{{dataType}}}, {{/allParams}}options: any = {}) : Promise<{ response: http.{{#supportsES6}}IncomingMessage{{/supportsES6}}{{^supportsES6}}ClientResponse{{/supportsES6}}; {{#returnType}}body: {{{returnType}}}; {{/returnType}}{{^returnType}}body?: any; {{/returnType}} }> {
         const localVarPath = this.basePath + '{{{path}}}'{{#pathParams}}
             .replace('{' + '{{baseName}}' + '}', encodeURIComponent(String({{paramName}}))){{/pathParams}};
         let localVarQueryParameters: any = {};
@@ -397,6 +398,7 @@ export class {{classname}} {
 {{#headerParams}}
         localVarHeaderParams['{{baseName}}'] = ObjectSerializer.serialize({{paramName}}, "{{{dataType}}}");
 {{/headerParams}}
+        (<any>Object).assign(localVarHeaderParams, options.headers);
 
         let localVarUseFormData = false;
 

samples/client/petstore/typescript-node/default/.swagger-codegen/VERSION

@@ -1 +1 @@
-2.4.0-SNAPSHOT
+2.4.1-SNAPSHOT