辛宝Otto 的玄酒清谈

Listening Methods#

• Xiaoyuzhou FM
• Apple Podcasts
• IPFS

AI Summary Experiment#

Here is a summary of the podcast:

• OG images are Open Graph images used for social media previews when sharing a link. They are defined using meta tags with attributes like "OG".
• There are different methods for dynamically generating OG images, including using packages like Satori/Vercel OG and Cloudinary, or programmatically capturing screenshots with Puppeteer or Playwright.
• Satori allows generating images from React components, but has limitations in CSS support. Cloudinary involves assembling images using commands in the URL, which can be complex.
• Capturing screenshots of dynamically generated pages with Puppeteer or Playwright is a simple method that allows full CSS control, but requires rendering the page first.
• Factors to consider include support for custom fonts, layout handling, borders, rendering performance, and image storage/caching.
• The examples discussed generating images for blog posts, videos, podcasts, etc., which can include dynamic data like author photos, text, and dates.

In summary, the podcast discusses what OG images are, different techniques for dynamically generating them like Satori, Cloudinary, and headless browsers, and the trade-offs of each approach.

Content Introduction#

The topic of this episode is: OG image.

Original Syntax.fm link: https://syntax.fm/show/659/og-image-options
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Basic Concepts#

The Open Graph (OG) protocol was introduced by Facebook in 2010 to make links on social media more expressive and display social website metadata. It allows previewing images and is important for SEO.

There are various types of OG images, such as for articles, videos, photos, etc. Different websites have different requirements for image ratios, which can be strange.

Creation and Validation#

How to test the display effects of OG tags on different websites, i.e., how to test the effects?

There are software and tools available for testing OG, such as Polypane, which is a convenient service.

The browser for ambitious web developers.

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There are also official debuggers for Twitter and Facebook:

• Facebook
• Twitter
• LinkedIn
• Structured Data

These links may come in handy.

If an article is updated and the information needs to be updated, there are places to manually refresh the cache and fetch it again.

Exploring Dynamic SVG and Puppeteer Solutions#

There are many solutions available to help generate OG images dynamically:

• vercel/satori: Enlightened library to convert HTML and CSS to SVG: Generates SVG dynamically by passing parameters and using JSX.
• Cloudinary for image and video compression: Involves assembling images using commands in the URL.
• Puppeteer can be used to render screenshots, and there is a version of Puppeteer for serverless (sls).
• Cloudflare Puppeteer documentation: Powerful, can be used with Puppeteer in a worker.
• The host created a dynamic observation URL and effect here.
• Caching support is provided to avoid repetitive operations and perform operations on demand.
• Playwright can also be used for screenshot capture, such as Playwright.

Knowledge Point Guide#

OG image
A formal website introducing the Open Graph protocol is ogp.me.

The Open Graph protocol enables any web page to become a rich object in a social graph. For instance, this is used on Facebook to allow any web page to have the same functionality as any other object on Facebook. While there are several different technologies and protocols that can be used, and can be combined in various ways, we focus on one—Open Graph Protocol (OGP)—that provides a simple and consistent framework for all developers to use. It is a key goal of the Open Graph Protocol to make developers' lives easier, and it provides information for many technical design decisions.

Article and additional links:

• Article introducing OG tags by meta dev: developers.facebook.com
• Meta Tags Toolkit: Preview, edit, and generate meta tags.
• OG introduction by Vercel: vercel
• Different implementations and debugger tools: ogp.me
• Canva API documentation: Developer Documentation

Yoast SEO is one of the plugins for WordPress that allows content creators to add meta tags, including titles and descriptions, to their posts. These tags are displayed in Google search results and broadcast the content of the page to potential readers.

Yoast SEO also allows you to add OG images to any post on WordPress. However, you need to upgrade to a business account to access this feature.

Canva API documentation: Developer Documentation

Yoast SEO is one of the plugins for WordPress that allows content creators to add meta tags, including titles and descriptions, to their posts. These tags are displayed in Google search results and broadcast the content of the page to potential readers.

Yoast SEO also allows you to add OG images to any post on WordPress. However, you need to upgrade to a business account to access this feature.

Related Links#

• syntax.fm 659

Additional Information#

Based on the original tags, we have constructed the following Open Graph properties: