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Fetch artwork offered only over http for the https page (#90)

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Through ipodderx.sdf1.net the page is https, the browser upgrades an http:// image to https,
and a host with no https, such as The Secret Cabal's CDN, answers nothing, so no artwork. On an
https page, the page now asks /api/art for those, and ipx fetches them. It only fetches an
address some feed or entry names as its artwork, and only an image, up to 5 MB, so the route
cannot be pointed at anything else on the network.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Ray Slakinski
2026-09-29 16:19:06 +00:00
parent 928cbaf8f4
commit 36b16c7f5d
4 changed files with 62 additions and 2 deletions
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9
web/src/util.ts
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@@ -145,9 +145,14 @@ const tint=name=>{ let h=0; for(const c of name||'?') h=(h*31+c.charCodeAt(0))>>
function tileHTML(name,cls){
return `<div class="art ini ${cls||''}" style="--tint:${tint(name)}">${esc(initials(name))}</div>`;
}
/// On the https page, the browser upgrades an http:// image to https, and a host that has no
/// https shows nothing (issue #90); ipx fetches those itself.
function artSrc(url: string){
return location.protocol==='https:'&&/^http:\/\//i.test(url) ? '/api/art?u='+encodeURIComponent(url) : url;
}
function artHTML(url: string | null, name: string, cls?: string){
return url
? `<img class="art ${cls||''}" src="${esc(url)}" alt="" loading="lazy" onerror="this.outerHTML=${esc(JSON.stringify(tileHTML(name,cls)))}">`
? `<img class="art ${cls||''}" src="${esc(artSrc(url))}" alt="" loading="lazy" onerror="this.outerHTML=${esc(JSON.stringify(tileHTML(name,cls)))}">`
: tileHTML(name,cls);
}
/// A folder's tile is its first four shows' art. With fewer than four to show, the folder's own.
@@ -156,7 +161,7 @@ function folderArt(f,kids){
if(art.length<4) return artHTML(f.image,f.title||f.id);
// Tinted underneath, so art that fails to load leaves colour behind rather than a hole.
return `<div class="art ini mosaic" style="--tint:${tint(f.title||f.id)}">${art.map(c=>
`<img src="${esc(c.image)}" alt="" loading="lazy" onerror="this.style.visibility='hidden'">`).join('')}</div>`;
`<img src="${esc(artSrc(c.image))}" alt="" loading="lazy" onerror="this.style.visibility='hidden'">`).join('')}</div>`;
}
/// The sidebar slides over the page on a phone, so it needs a scrim to tap away.