Implement support for html output for testing purposes

Author: kimmobrunfeldt

src/core/render-core.js

@@ -152,6 +152,8 @@ async function render(_opts = {}) {
 
     if (opts.output === 'pdf') {
       data = await page.pdf(opts.pdf);
+    } else if (opts.output === 'html') {
+      data = await page.evaluate(() => document.body.innerHTML);
     } else {
       // This is done because puppeteer throws an error if fullPage and clip is used at the same
       // time even though clip is just empty object {}

src/http/render-http.js

@@ -5,7 +5,10 @@ const renderCore = require('../core/render-core');
 function getMimeType(opts) {
   if (opts.output === 'pdf') {
     return 'application/pdf';
+  } else if (opts.output === 'html') {
+    return 'text/html';
   }
+
   const type = _.get(opts, 'screenshot.type');
   switch (type) {
     case 'png': return 'image/png';

src/util/validation.js

@@ -29,7 +29,7 @@ const sharedQuerySchema = Joi.object({
     Joi.string().min(1).max(2000),
   ]),
   cookies: Joi.array().items(cookieSchema),
-  output: Joi.string().valid(['pdf', 'screenshot']),
+  output: Joi.string().valid(['pdf', 'screenshot', 'html']),
   'viewport.width': Joi.number().min(1).max(30000),
   'viewport.height': Joi.number().min(1).max(30000),
   'viewport.deviceScaleFactor': Joi.number().min(0).max(100),
@@ -76,7 +76,7 @@ const renderBodyObject = Joi.object({
   ignoreHttpsErrors: Joi.boolean(),
   emulateScreenMedia: Joi.boolean(),
   cookies: Joi.array().items(cookieSchema),
-  output: Joi.string().valid(['pdf', 'screenshot']),
+  output: Joi.string().valid(['pdf', 'screenshot', 'html']),
   viewport: Joi.object({
     width: Joi.number().min(1).max(30000),
     height: Joi.number().min(1).max(30000),