Collect console.log messages and add them in the returned JSON

Author: alanpoulain

lib/scripts/pdf_a4_portrait.js

@@ -57,6 +57,12 @@ page.onLoadFinished = function (status) {
   // The paperSize object must be set at once
   page.paperSize = definePaperSize(getContent(page), options)
 
+  // Collect console.log messages in rendered web page and custom script
+  var consoleMessages = []
+  page.onConsoleMessage = function (msg) {
+    consoleMessages.push(msg)
+  }
+
   // Evaluate custom JavaScript
   if (options.evaluateScript) page.evaluateJavaScript(options.evaluateScript)
 
@@ -68,7 +74,7 @@ page.onLoadFinished = function (status) {
 
   var filename = options.filename || (options.directory || '/tmp') + '/html-pdf-' + system.pid + '.' + fileOptions.type
   page.render(filename, fileOptions)
-  system.stdout.write(JSON.stringify({filename: filename}))
+  system.stdout.write(JSON.stringify({filename: filename, consoleMessages: consoleMessages}))
 
   exit(null)
 }