Add video support (experimental!)

src/site/api/proxy.js

@@ -3,47 +3,69 @@ const {request} = require("../../lib/utils/request")
 const {proxy} = require("pinski/plugins")
 const sharp = require("sharp")
 
+const VERIFY_SUCCESS = Symbol("VERIFY_SUCCESS")
+
+/**
+ * Check that a resource is on Instagram.
+ * @param {URL} completeURL
+ */
+function verifyURL(completeURL) {
+	const params = completeURL.searchParams
+	if (!params.get("url")) return {status: "fail", value: [400, "Must supply `url` query parameter"]}
+	try {
+		var url = new URL(params.get("url"))
+	} catch (e) {
+		return {status: "fail", value: [400, "`url` query parameter is not a valid URL"]}
+	}
+	// check url protocol
+	if (url.protocol !== "https:") return {status: "fail", value: [400, "URL protocol must be `https:`"]}
+	// check url host
+	if (!["fbcdn.net", "cdninstagram.com"].some(host => url.host.endsWith(host))) return {status: "fail", value: [400, "URL host is not allowed"]}
+	return {status: "ok", url}
+}
 module.exports = [
-	{route: "/imageproxy", methods: ["GET"], code: async (input) => {
-		/** @type {URL} */
-		// check url param exists
-		const completeURL = input.url
-		const params = completeURL.searchParams
-		if (!params.get("url")) return [400, "Must supply `url` query parameter"]
-		try {
-			var url = new URL(params.get("url"))
-		} catch (e) {
-			return [400, "`url` query parameter is not a valid URL"]
+	{
+		route: "/imageproxy", methods: ["GET"], code: async (input) => {
+			const verifyResult = verifyURL(input.url)
+			if (verifyResult.status !== "ok") return verifyResult.value
+			if (!["png", "jpg"].some(ext => verifyResult.url.pathname.endsWith(ext))) return [400, "URL extension is not allowed"]
+			const params = input.url.searchParams
+			const width = +params.get("width")
+			if (typeof width === "number" && !isNaN(width) && width > 0) {
+				/*
+					This uses sharp to force crop the image to a square.
+					"entropy" seems to currently work better than "attention" on the thumbnail of this shortcode: B55yH20gSl0
+					Some thumbnails aren't square and would otherwise be stretched on the page without this.
+					If I cropped the images client side, it would have to be done with CSS background-image, which means no <img srcset>.
+				*/
+				return request(verifyResult.url).then(res => {
+					const converter = sharp().resize(width, width, {position: "entropy"})
+					return {
+						statusCode: 200,
+						contentType: "image/jpeg",
+						headers: {
+							"Cache-Control": constants.caching.image_cache_control
+						},
+						stream: res.body.pipe(converter)
+					}
+				})
+			} else {
+				// No specific size was requested, so just stream proxy the file directly.
+				return proxy(verifyResult.url, {
+					"Cache-Control": constants.caching.image_cache_control
+				})
+			}
 		}
-		// check url protocol
-		if (url.protocol !== "https:") return [400, "URL protocol must be `https:`"]
-		// check url host
-		if (!["fbcdn.net", "cdninstagram.com"].some(host => url.host.endsWith(host))) return [400, "URL host is not allowed"]
-		if (!["png", "jpg"].some(ext => url.pathname.endsWith(ext))) return [400, "URL extension is not allowed"]
-		const width = +params.get("width")
-		if (typeof width === "number" && !isNaN(width) && width > 0) {
-			/*
-				This uses sharp to force crop the image to a square.
-				"entropy" seems to currently work better than "attention" on the thumbnail of this shortcode: B55yH20gSl0
-				Some thumbnails aren't square and would otherwise be stretched on the page without this.
-				If I cropped the images client side, it would have to be done with CSS background-image, which means no <img srcset>.
-			*/
-			return request(url).then(res => {
-				const converter = sharp().resize(width, width, {position: "entropy"})
-				return {
-					statusCode: 200,
-					contentType: "image/jpeg",
-					headers: {
-						"Cache-Control": constants.caching.image_cache_control
-					},
-					stream: res.body.pipe(converter)
-				}
-			})
-		} else {
-			// No specific size was requested, so just stream proxy the file directly.
+	},
+	{
+		route: "/videoproxy", methods: ["GET"], code: async (input) => {
+			const verifyResult = verifyURL(input.url)
+			if (verifyResult.status !== "ok") return verifyResult.value
+			const url = verifyResult.url
+			if (!["mp4"].some(ext => url.pathname.endsWith(ext))) return [400, "URL extension is not allowed"]
 			return proxy(url, {
 				"Cache-Control": constants.caching.image_cache_control
 			})
 		}
-	}}
+	}
 ]

src/site/api/routes.js

@@ -92,6 +92,7 @@ module.exports = [
 			return getOrFetchShortcode(fill[0]).then(async post => {
 				await post.fetchChildren()
 				await post.fetchExtendedOwnerP() // parallel await is okay since intermediate fetch result is cached
+				if (post.isVideo()) await post.fetchVideoURL()
 				return render(200, "pug/post.pug", {post})
 			}).catch(error => {
 				if (error === constants.symbols.NOT_FOUND) {

src/site/pug/post.pug

@@ -22,5 +22,8 @@ html
 				if post.getCaption()
 					p.description= post.getCaption()
 			section.images-gallery
-				for image in post.children
-					img(src=image.getDisplayUrlP() alt=image.getAlt() width=image.data.dimensions.width height=image.data.dimensions.height).sized-image
+				for entry in post.children
+					if entry.isVideo()
+						video(src=entry.getVideoUrlP() controls preload="auto" width=entry.data.dimensions.width height=entry.data.dimensions.height).sized-video
+					else
+						img(src=entry.getDisplayUrlP() alt=entry.getAlt() width=entry.data.dimensions.width height=entry.data.dimensions.height).sized-image

src/site/sass/main.sass

@@ -267,17 +267,23 @@ body
 			@media screen and (max-width: $layout-a-max)
 				flex: 1
 
-			.sized-image
+			.sized-image, .sized-video
 				color: #eee
 				background-color: #3b3c3d
 				max-height: 94vh
 				max-width: 100%
-				width: auto
-				height: auto
 
 				&:not(:last-child)
 					margin-bottom: 10px
 
+			.sized-image
+				width: auto
+				height: auto
+
+			.sized-video
+				width: 100%
+				height: 100%
+
 .error-page
 	box-sizing: border-box
 	min-height: 100vh