fix instagram downloads

merge pull request #169 from dumbmoron/fix-instagram

src/modules/processing/services/instagram.js

@@ -1,35 +1,69 @@
-import got from "got";
+import { createStream } from "../../stream/manage.js";
+import { genericUserAgent } from "../../config.js";
 
 export default async function(obj) {
-    // i hate this implementation but fetch doesn't work here for some reason (i personally blame facebook)
-    let html;
+    let data;
     try {
-        html = await got.get(`https://www.instagram.com/p/${obj.id}/`)
-        html.on('error', () => {
-            html = false;
-        });
-        html = html ? html.body : false;
+        const url = new URL('https://www.instagram.com/graphql/query/');
+        url.searchParams.set('query_hash', 'b3055c01b4b222b8a47dc12b090e4e64')
+        url.searchParams.set('variables', JSON.stringify({
+            child_comment_count: 3,
+            fetch_comment_count: 40,
+            has_threaded_comments: true,
+            parent_comment_count: 24,
+            shortcode: obj.id
+        }))
+
+        data = await fetch(url, {
+            headers: {
+                'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
+                'User-Agent': genericUserAgent,
+                'X-Ig-App-Id': '936619743392459',
+                'X-Asbd-Id': '129477',
+                'Sec-Fetch-Dest': 'empty',
+                'Sec-Fetch-Mode': 'cors',
+                'Sec-Fetch-Site': 'same-origin',
+                'upgrade-insecure-requests': '1',
+                'accept-encoding': 'gzip, deflate, br',
+                'accept-language': 'en-US,en;q=0.9,en;q=0.8'
+            }
+        })
+        data = (await data.json()).data;
     } catch (e) {
-        html = false;
+        data = false;
     }
 
-    if (!html) return { error: 'ErrorCouldntFetch' };
-    if (!html.includes('application/ld+json')) return { error: 'ErrorEmptyDownload' };
 
-    let single, multiple = [], postInfo = JSON.parse(html.split('script type="application/ld+json"')[1].split('">')[1].split('</script>')[0]);
-    if (Array.isArray(postInfo)) postInfo = postInfo[0];
+    if (!data) return { error: 'ErrorCouldntFetch' };
 
-    if (postInfo.video.length > 1) {
-        for (let i in postInfo.video) { multiple.push({type: "video", thumb: postInfo.video[i]["thumbnailUrl"], url: postInfo.video[i]["contentUrl"]}) }
-    } else if (postInfo.video.length === 1) {
-        single = postInfo.video[0]["contentUrl"]
+    let single, multiple = [];
+    const sidecar = data?.shortcode_media?.edge_sidecar_to_children;
+    if (sidecar) {
+        sidecar.edges.forEach(e => {
+            // todo: allow downloading images once frontend supports it
+            if (e.node?.is_video) {
+                multiple.push({
+                    type: "video",
+                    // thumbnails have `Cross-Origin-Resource-Policy` set to `same-origin`, so we need to proxy them
+                    thumb: createStream({
+                        service: "instagram",
+                        type: "default",
+                        u: e.node?.display_url,
+                        filename: "image.jpg"
+                    }),
+                    url: e.node?.video_url
+                })
+            }
+        })
+    } else if (data?.shortcode_media?.video_url) {
+        single = data.shortcode_media.video_url
     } else {
         return { error: 'ErrorEmptyDownload' }
     }
 
     if (single) {
         return { urls: single, filename: `instagram_${obj.id}.mp4`, audioFilename: `instagram_${obj.id}_audio` }
-    } else if (multiple) {
+    } else if (multiple.length) {
         return { picker: multiple }
     } else {
         return { error: 'ErrorEmptyDownload' }