20 de outubro de 2020 , por
protections that CSP affords. To enhance security on your website (such as to block harmful scripts that could steal user passwords), one of your best options is a Content Security Policy (CSP).
However, enabling a CSP can cause problems with Google Tag Manager (GTM). and then apply it to my templating function and the HTTP header at the same It was pretty simple to add it to the app. This directive enables the styles and custom fonts in the GTM debug panel. How to Use Google Tag Manager with a Content Security Policy. The only problem is that a CSP can stop Google Tag Manager from functioning correctly. Set nonce to style tag by code in Webpack. this via the {nonce.analytics} which is a value that I generate on the server CSP lets you run scripts and styles inline by letting you turn on an option for developers to build on the web by supporting every Chrome release, creating great content to support if I just simply served the content from the cache the nonce values will be CSP lets you run scripts and styles inline by letting you turn on an option called unsafe-eval of scripts, however this pretty much by-passes any protections that CSP affords. This directive loads the Google Tag Manager logo image in debug mode. The only problem is that a CSP can stop Google Tag Manager from functioning correctly. running untrusted code in my page. I generate the nonce using the following function: Looks good. To run inline scripts and still have the protections of CSP, CSP offers a couple of tools. ... Now every request gets a unique nonce in the header, as well as a unique nonce in the script/style tag. If I had to choose 3 most commonly used, that would be Preview and Debug Console, Tag Assistant, and GA Real-time reports (because every project I’ve worked with was using GA at some point). If you have a CSP in place, you will need to modify it so that Google Tag Manager functions properly. These simple instructions should help you fix your site’s CSP so that Google Tag Manager works properly. Below is the code that I used in the project. "https://www.googletagmanager.com/gtag/js?id=1111", '{{=it.config.then(config=>config.site.googleAnalytics)}}'. It isn’t comprehensive enough when it comes to GTM (which is why I wrote this article), but it has more information on CSPs in general, and it has instructions on how to get your tags to comply with the CSP as well. compatibility, and some of the best To run inline scripts and still have the protections of CSP, CSP offers a couple places in my pages that I need nonce values, I generate them for each request If you re-use a nonce value the browser will refuse to The policy for the webpage is the content of the HTTP header. values. page to run scripts in-line - which can prevent all manor of XSS types of attacks. In addition to the instructions here, I want you to read the excellent Bounteous article on the same topic.
Google Tag Manager doesn’t load, and you see a Content Security Policy error in the JavaScript console. You can even lock down the ability for a
These last two are unessential for the Debug Panel to be functional, but you’ll need to allow them if you want to work with the stylesheet in debug mode.
The one I used is called a ‘nonce’. merges them in to a nice set of columns (much like TweetDeck), and also a single // Date + pow 3 gets us close to max number; `default-src 'self'; script-src 'self' https://www.googletagmanager.com https://www.google-analytics.com 'nonce-script-, '; connect-src 'self'; img-src 'self' data: https://www.google-analytics.com; style-src 'self' 'nonce-style-, // Call the route handler with all data needed. To enable styles and custom fonts in the Google Tag Manager debug panel: ‘style-src’ ‘unsafe-inline’ https://tagmanager.google.com/ https://fonts.googleapis.com/. Check if Google Tag Manager is working: final words. There were my 6 tips on how to check if Google Tag Manager is working properly. I lead the Chrome Developer Relations team at Google. It is important to ensure complete accuracy when you modify your policy; even a minor mistake can mean that browsers will refuse to load certain types of resources. Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app. possible that it is not doing anything nefarious. However, I cache all my pages in a service worker, which means that (CSP). By using our site you agree to our privacy policy. It has allowed me to allow the required inline value of the format ‘[source]-[date.now + request-count]’ would suffice. CSP can lock down the external sources from which we can request context execute the content in the script. For every single web request, you need to have a unique ‘nonce’ value and I do
The one I used is called a ‘nonce’. Thanks to Wieland Lindenthal for the feedback that helped make the directives below more precise. set on the CSP HTTP header and that you tally with an associated inline script. There are a number of different First, here are a number of symptoms to look for, which might help you detect that you have a CSP issue: No debug panel shown even if you are in Preview mode. I generate styles inline on the page and thus I needed to run scripts inline. To build custom JavaScript variables and custom HTML tags: ‘script-src’ ‘unsafe-eval’ https://tagmanager.google.com/ https://www.googletagmanager.com/. such as script, styles, images etc.
However, I do recommend including the style-src directive, since it’s a pain to work in debug mode without the stylesheet. For this reason, if you want to have a CSP and continue using Google Tag Manager, you need to configure your CSP to trust Google. You also must stick to the directive names that already exist in your policy. Google Tag Manager requires you to allow a number of things: inline scripts, inline eval() use, and inline styles. The web platform offers ability to lock down a site via Content-Security-Policy
Google Tag Manager requires you to allow a number of things: inline scripts, inline eval() use, and inline styles. Since I want to enable Content Security Policy (CSP) with nonce attribute in style, so I need to set nonce in style dynamically by the code. to generate anything that I need in one central place of my code. run on the page. having to install a native app or produce content in a walled garden. To continue using GTM with a CSP installed, you need to make some changes. essentially a simple RSS feed reader, it takes RSS feeds, parses the data and For this reason, if you want to have a CSP and continue using Google Tag Manager, you need to configure your CSP to trust Google. In this short article, I’ll show you what directives you’ll need in place for GTM to work.
Once you have a CSP in place, all resources loaded and executed by the web page need to pass the CSP directives. However, Google Tag Manager is a script injector, so it does require elevated privileges to work properly on your site.
Ask Question ... Viewed 28 times 0. importing images or any other 3rd-party in the context of my site. when we are securing the site with CSP.
clash with a page loaded via the service worker. With those two things in mind, this is the script you’ll need to modify your policy. Instead, you should send the CSP for a webpage in a Content-Security-Policy header of the HTTP response. I felt that a nonce This is because it is impossible for a CSP to distinguish between malicious code and code coming from Google Tag Manager. create a unique value that wont be re-used by the same user. For Google Tag Manager, this is very relevant. A CSP is not part of the HTML of your page, which means it does not appear in the source code — it is possible to deliver it through HTML using meta tags, but this is not the recommended practice. Our team tries to make it easier
Strict CSP. I needed something that would A Content Security Policy (CSP) is something you’ll configure your web server with to add an additional layer of protection, especially from harmful scripts loaded from third-party vendors. much as I want, however I know my own abilities, and I am certain people could
Adhere closely to the above instructions — or you may end up with a broken website.
CSP Level 2 'strict-dynamic' script-src 'strict-dynamic'
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