Not returning serviceworker.js

[bloggerpact]

Hey @tgerulaitis

I used the modman to install the plugin, everything looks okay from the back-end have https enabled cleared cache but the url.com/serviceworker.js service worker does not return Javascript. I'm using custom theme & also tried with rwd theme.
In waiting for your quick response

[tgerulaitis]

Hi @bloggerpact,

What version of Magento are you running? Do you have "Allow Symlinks" set to "Yes" in System > Configuration > Advanced > Developer > Template Settings (You might not have that setting anymore if you're running on the latest version of Magento)?

First thing I would try is running:

modman deploy --copy magento-meanbee-pwa

Then flushing the Magento cache and running through setup scripts.

[fintzen]

I cleared cache and become this error message.
console.log('Service worker registration failed:', err);
url.com/serviceworker.js is just a blank page - not code.

In Safari = Blank page
In Firefox = Blank page
In Chrome = /serviceworker.js Failed to load resource: net::ERR_INVALID_RESPONSE
(index):95 Service worker registration failed: TypeError: Failed to register a ServiceWorker: A bad HTTP response code (500) was received when fetching the script.

I use magento 1.9.1.1 and i have "Allow symlinks" enabled.
What do I'm wrong?

[tgerulaitis]

@fintzen, looks like there's an exception being thrown on the server, resulting in a 500 HTTP response code. Could you check var/log/exception.log and var/log/system.log for any relevant error messages?

[fintzen]

@tgerulaitis i found this 3 errors in system.log

2018-01-09T09:36:01+00:00 ERR (3): Warning: simplexml_load_string(): Entity: line 55: parser error : Start tag expected, '<' not found in /html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 450
2018-01-09T09:36:01+00:00 ERR (3): Warning: simplexml_load_string(): in /html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 450
2018-01-09T09:36:01+00:00 ERR (3): Warning: simplexml_load_string(): ^ in /html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 450

[tgerulaitis]

@fintzen , that's strange. The error messages seem to indicate that you have an invalid layout xml file. I would check app/design/frontend/base/default/layout and app/design/frontend/<yourpackage>/<yourtheme>/layout for any xml files that have invalid code at the start. Although, I'm not sure if this is going to be related to your problems generating the service worker file.

Just to eliminate another common issue, what web server are you using for Magento? Apache or Nginx? If it's Nginx, does it allow /serviceworker.js to be served by PHP? (I've seen a lot of Nginx configurations that assume anything ending in .js is a file and not letting PHP respond)

[fintzen]

@tgerulaitis , now i found the invalid code at the start of a page.xml file.
But it was not the problem that was related to the service worker problem.

I use a apache server for magento.
I really have no idea why the service worker is not working.

[tgerulaitis]

@fintzen, Yeah, I'm not sure either, unfortunately. I've set up a fresh instance of Magento 1.9.1.1 myself locally to test this and I'm not seeing any errors running the module. Unfortunately, without more information about the problem there's nothing else I can do.

Have you looked at your web server error logs or PHP logs?

[fintzen]

I can't find any other error logs on my server.
Now I have a little bit trying to start the ServiceWorker.
I put the .js on direct in the directory url.com/serviceworker.js
Now I have a other error message.

[tgerulaitis]

@fintzen the serviceworker.js file in the templates directory is not a valid service worker file. It's a template that contains PHP tags which Magento should evaluate and replace with appropriate values. It's not going to work if being served directly through the web server.

[fintzen]

@tgerulaitis, oh yes I'm really sorry for that dumb comment. 😅
I just see my server can't find the resource - so I put it in there to test if it's run.

[rafaelpatro]

Same problem with me!
Load layout was not loading properly. It was rendering a blank page too.
This was because another extension or theme was applying a block without a referencing block (without ancestor, without parent). Only root block could do it.

It was solved by locating the extension and updating meanbee_pwa.xml.
Added a new removal tag: <remove name="sucking-extension-block" />

Good luck!

[fintzen]

@rafaelpatro, Wich extension / wich block was the problem? Maybe we use the same.

[rafaelpatro]

Extension: Mirasvit Searchautocomplete
File: /app/design/frontend/base/default/layout/mst_searchautocomplete.xml

<?xml version="1.0"?>
<layout version="0.1.0">
    <default>
        <reference name="head">
            <action method="addJs" ifconfig="searchautocomplete/general/enabled"><script>mirasvit/core/jquery.min.js</script></action>
            <action method="addJs" ifconfig="searchautocomplete/general/enabled"><script>mirasvit/core/underscore.js</script></action>
            <action method="addJs" ifconfig="searchautocomplete/general/enabled"><script>mirasvit/core/backbone.js</script></action>
            <action method="addJs" ifconfig="searchautocomplete/general/enabled"><script>mirasvit/code/searchautocomplete/form.js</script></action>
            <action method="addJs" ifconfig="searchautocomplete/general/enabled"><script>mirasvit/code/searchautocomplete/autocomplete.js</script></action>
            <action method="addItem" ifconfig="sales/msrp/enabled"><type>skin_js</type><name>js/msrp.js</name></action>
        </reference>

        <block type="searchautocomplete/layout" name="search.block">
            <action method="addSearchAutocomplete" ifconfig="searchautocomplete/general/enabled" />
        </block>

Solution

Edit: /app/design/frontend/base/default/layout/meanbee_pwa.xml
Add a removal tag for search.block:

<?xml version="1.0"?>
<layout>
    <default>
        <reference name="after_body_start">
            <block name="serviceworker.register" type="meanbee_pwa/serviceworker_register" template="pwa/serviceworker/register.phtml"/>
        </reference>
    </default>

    <serviceworker_index_js>
        <remove name="root"/>
        <remove name="search.block"/>
        <block name="serviceworker.js" type="meanbee_pwa/serviceworker_js" template="pwa/serviceworker/serviceworker.js" output="toHtml"/>
    </serviceworker_index_js>
</layout>

[tgerulaitis]

Excellent, thank you @rafaelpatro !