Jinemi/thermograph
4
0
Fork 0
Code Issues 2 Pull requests 3 Projects Releases Packages Wiki Activity Actions

Link previews: Open Graph tags + logo for shared URLs (#35)

Browse source 
Sharing a Thermograph URL (Discord, Slack, iMessage…) now unfurls into a
card with the site name, page title, description, accent color, and logo.

- All five pages get description/theme-color/og:*/twitter:card meta and a
  favicon. og:url/og:image need absolute URLs and crawlers don't run JS, so
  pages carry an __ORIGIN__ placeholder the server fills in per request from
  X-Forwarded-Proto (Caddy) / scheme + the Host header + base path — correct
  on both the LAN dev server and the prod domain without hardcoding either.
- New logo assets: the header's ▚ mark as an app icon (accent quadrants on
  the dark surface) — logo.png (512x512, the og:image) and logo.svg (favicon).
- Page routes render the substitution with a weak ETag + 304 revalidation
  (replacing plain FileResponse) and now answer HEAD, which preview crawlers
  probe with (previously 404).
This commit is contained in:
Emi Griffith 2026-07-11 08:59:14 -07:00 committed by GitHub
parent e3088720a6
commit 85e4e08f96
7 changed files with 92 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
static/calendar.html
View file

@ -4,6 +4,23 @@
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Thermograph — 2-year calendar</title>
<meta name="description" content="Pick any point on Earth and see how its recent weather stacks up against ~45 years of local climate history — graded days, calendars, forecasts, and side-by-side comparisons." />
<meta name="theme-color" content="#f0803c" />
<!-- Link previews (Discord, Slack, iMessage…). The server fills the og:url /
og:image origins in from this request's scheme://host + base path —
crawlers need absolute URLs and don't run JS. -->
<meta property="og:type" content="website" />
<meta property="og:site_name" content="Thermograph" />
<meta property="og:title" content="Thermograph — 2-year calendar" />
<meta property="og:description" content="Pick any point on Earth and see how its recent weather stacks up against ~45 years of local climate history — graded days, calendars, forecasts, and side-by-side comparisons." />
<meta property="og:url" content="__ORIGIN__/calendar" />
<meta property="og:image" content="__ORIGIN__/logo.png" />
<meta property="og:image:width" content="512" />
<meta property="og:image:height" content="512" />
<meta property="og:image:alt" content="Thermograph logo" />
<meta name="twitter:card" content="summary" />
<link rel="icon" href="logo.svg" type="image/svg+xml" />
<link rel="apple-touch-icon" href="logo.png" />
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" />
<link rel="stylesheet" href="style.css" />
</head>

17
static/compare.html
View file

@ -4,6 +4,23 @@
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Thermograph — compare comfort</title>
<meta name="description" content="Pick any point on Earth and see how its recent weather stacks up against ~45 years of local climate history — graded days, calendars, forecasts, and side-by-side comparisons." />
<meta name="theme-color" content="#f0803c" />
<!-- Link previews (Discord, Slack, iMessage…). The server fills the og:url /
og:image origins in from this request's scheme://host + base path —
crawlers need absolute URLs and don't run JS. -->
<meta property="og:type" content="website" />
<meta property="og:site_name" content="Thermograph" />
<meta property="og:title" content="Thermograph — compare comfort" />
<meta property="og:description" content="Pick any point on Earth and see how its recent weather stacks up against ~45 years of local climate history — graded days, calendars, forecasts, and side-by-side comparisons." />
<meta property="og:url" content="__ORIGIN__/compare" />
<meta property="og:image" content="__ORIGIN__/logo.png" />
<meta property="og:image:width" content="512" />
<meta property="og:image:height" content="512" />
<meta property="og:image:alt" content="Thermograph logo" />
<meta name="twitter:card" content="summary" />
<link rel="icon" href="logo.svg" type="image/svg+xml" />
<link rel="apple-touch-icon" href="logo.png" />
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" />
<link rel="stylesheet" href="style.css" />
</head>

17
static/day.html
View file

@ -4,6 +4,23 @@
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Thermograph — a single day</title>
<meta name="description" content="Pick any point on Earth and see how its recent weather stacks up against ~45 years of local climate history — graded days, calendars, forecasts, and side-by-side comparisons." />
<meta name="theme-color" content="#f0803c" />
<!-- Link previews (Discord, Slack, iMessage…). The server fills the og:url /
og:image origins in from this request's scheme://host + base path —
crawlers need absolute URLs and don't run JS. -->
<meta property="og:type" content="website" />
<meta property="og:site_name" content="Thermograph" />
<meta property="og:title" content="Thermograph — a single day" />
<meta property="og:description" content="Pick any point on Earth and see how its recent weather stacks up against ~45 years of local climate history — graded days, calendars, forecasts, and side-by-side comparisons." />
<meta property="og:url" content="__ORIGIN__/day" />
<meta property="og:image" content="__ORIGIN__/logo.png" />
<meta property="og:image:width" content="512" />
<meta property="og:image:height" content="512" />
<meta property="og:image:alt" content="Thermograph logo" />
<meta name="twitter:card" content="summary" />
<link rel="icon" href="logo.svg" type="image/svg+xml" />
<link rel="apple-touch-icon" href="logo.png" />
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" />
<link rel="stylesheet" href="style.css" />
</head>

17
static/index.html
View file

@ -4,6 +4,23 @@
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Thermograph — how unusual is your weather?</title>
<meta name="description" content="Pick any point on Earth and see how its recent weather stacks up against ~45 years of local climate history — graded days, calendars, forecasts, and side-by-side comparisons." />
<meta name="theme-color" content="#f0803c" />
<!-- Link previews (Discord, Slack, iMessage…). The server fills the og:url /
og:image origins in from this request's scheme://host + base path —
crawlers need absolute URLs and don't run JS. -->
<meta property="og:type" content="website" />
<meta property="og:site_name" content="Thermograph" />
<meta property="og:title" content="Thermograph — how unusual is your weather?" />
<meta property="og:description" content="Pick any point on Earth and see how its recent weather stacks up against ~45 years of local climate history — graded days, calendars, forecasts, and side-by-side comparisons." />
<meta property="og:url" content="__ORIGIN__/" />
<meta property="og:image" content="__ORIGIN__/logo.png" />
<meta property="og:image:width" content="512" />
<meta property="og:image:height" content="512" />
<meta property="og:image:alt" content="Thermograph logo" />
<meta name="twitter:card" content="summary" />
<link rel="icon" href="logo.svg" type="image/svg+xml" />
<link rel="apple-touch-icon" href="logo.png" />
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" />
<link rel="stylesheet" href="style.css" />
</head>

17
static/legend.html
View file

@ -4,6 +4,23 @@
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Thermograph — reading the grades</title>
<meta name="description" content="Pick any point on Earth and see how its recent weather stacks up against ~45 years of local climate history — graded days, calendars, forecasts, and side-by-side comparisons." />
<meta name="theme-color" content="#f0803c" />
<!-- Link previews (Discord, Slack, iMessage…). The server fills the og:url /
og:image origins in from this request's scheme://host + base path —
crawlers need absolute URLs and don't run JS. -->
<meta property="og:type" content="website" />
<meta property="og:site_name" content="Thermograph" />
<meta property="og:title" content="Thermograph — reading the grades" />
<meta property="og:description" content="Pick any point on Earth and see how its recent weather stacks up against ~45 years of local climate history — graded days, calendars, forecasts, and side-by-side comparisons." />
<meta property="og:url" content="__ORIGIN__/legend" />
<meta property="og:image" content="__ORIGIN__/logo.png" />
<meta property="og:image:width" content="512" />
<meta property="og:image:height" content="512" />
<meta property="og:image:alt" content="Thermograph logo" />
<meta name="twitter:card" content="summary" />
<link rel="icon" href="logo.svg" type="image/svg+xml" />
<link rel="apple-touch-icon" href="logo.png" />
<link rel="stylesheet" href="style.css" />
</head>
<body>

BIN
static/logo.png Normal file
View file

Binary file not shown.
Side by side

After

Width:  |  Height:  |  Size: 2.6 KiB

7
static/logo.svg Normal file
View file

@ -0,0 +1,7 @@
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
<!-- The ▚ brand mark from the header, as an app icon: two accent quadrants on
the app's dark surface. Keep in sync with logo.png (the og:image raster). -->
<rect width="512" height="512" rx="100" fill="#171b21"/>
<rect x="116" y="116" width="134" height="134" rx="20" fill="#f0803c"/>
<rect x="262" y="262" width="134" height="134" rx="20" fill="#f0803c"/>
</svg>
Side by side

After

Width:  |  Height:  |  Size: 445 B