Missing og:image Tags Leave Link Previews Blank — Fix It With Pure Python

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When shared on platforms like Slack, LinkedIn, or X, web pages without an og:image Open Graph tag display as blank or generic preview cards, reducing click-through rates. A simple curl command can reveal whether a page is missing this tag, returning either no image, a platform default, or a valid page-specific URL. Developers can generate a proper 1280x720 PNG cover image using only Python's standard library modules — struct and zlib — without needing third-party tools like Pillow or ImageMagick. The generated image can then be referenced in the page's HTML via the og:image meta tag using an absolute URL, since scrapers typically do not resolve relative paths. Cached previews may persist temporarily after the fix, but most platforms provide a re-scrape or debugger tool to refresh them.

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F/OSS Comics #13 Traces the Origins of BSD Unix in Part Three

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

Money Tracker app explains bill import without bank logins, using confirm-before-save

The developer of Money Tracker, an expense app for Android and iOS, describes its statement and bill import feature, which is available on the Premium tier. Users export a file such as a PDF or CSV from their bank or card issuer, then upload it to the app, which parses it into draft entries. Each draft must be reviewed and confirmed by the user before it is saved to their records. The developer stresses that the app never asks for bank credentials and does not maintain ongoing connections to accounts, unlike bank-sync services. The post presents this as a narrower, more controlled alternative to automatic open-banking sync.

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ProgrammingDEV Community ·

Contact form shows success but enquiries go missing: how to trace one test message

A contact form can display a success message while the enquiry never reaches the team's mailbox. The recommended approach is to follow a single identifiable test submission through the form, the sending route, and the receiving mailbox, rather than changing the mail plugin or DNS first. A successful wp_mail() return only means the sending method processed the request without error, not that the recipient got the email. Form plugins may also have demo or skip-mail settings that show success without sending, so these should be checked. Each finding, such as no matching record, a sending error, or provider acceptance, points to a different next check.

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