From cca61275f1590d8a4f7ab33f762e1b15eb9da5a9 Mon Sep 17 00:00:00 2001
From: jj <log@riseup.net>
Date: Sat, 8 Feb 2025 17:24:02 +0000
Subject: [PATCH] api/instagram: add support for `share` urls

closes #998
---
 api/src/processing/service-config.js     |  3 ++-
 api/src/processing/service-patterns.js   |  3 ++-
 api/src/processing/services/instagram.js | 34 ++++++++++++++++++++----
 3 files changed, 33 insertions(+), 7 deletions(-)

diff --git a/api/src/processing/service-config.js b/api/src/processing/service-config.js
index 86352f9a..68301adc 100644
--- a/api/src/processing/service-config.js
+++ b/api/src/processing/service-config.js
@@ -41,7 +41,8 @@ export const services = {
             "p/:postId",
             ":username/p/:postId",
             "tv/:postId",
-            "stories/:username/:storyId"
+            "stories/:username/:storyId",
+            "share/:shareId"
         ],
         altDomains: ["ddinstagram.com"],
     },
diff --git a/api/src/processing/service-patterns.js b/api/src/processing/service-patterns.js
index 42f64d26..cf89d574 100644
--- a/api/src/processing/service-patterns.js
+++ b/api/src/processing/service-patterns.js
@@ -6,7 +6,8 @@ export const testers = {
     "dailymotion": pattern => pattern.id?.length <= 32,
 
     "instagram": pattern =>
-        pattern.postId?.length <= 12
+        pattern.postId?.length <= 48
+        || pattern.shareId?.length <= 16
         || (pattern.username?.length <= 30 && pattern.storyId?.length <= 24),
 
     "loom": pattern =>
diff --git a/api/src/processing/services/instagram.js b/api/src/processing/services/instagram.js
index 031d7364..b60ec674 100644
--- a/api/src/processing/services/instagram.js
+++ b/api/src/processing/services/instagram.js
@@ -2,6 +2,7 @@ import { genericUserAgent } from "../../config.js";
 import { createStream } from "../../stream/manage.js";
 import { getCookie, updateCookie } from "../cookie/manager.js";
 import { randomBytes } from "node:crypto";
+import { resolveRedirectingURL } from "../url.js";
 
 const commonHeaders = {
     "user-agent": genericUserAgent,
@@ -54,7 +55,7 @@ const getObjectFromEntries = (name, data) => {
     return obj && JSON.parse(obj);
 }
 
-export default function(obj) {
+export default function instagram(obj) {
     const dispatcher = obj.dispatcher;
 
     async function findDtsgId(cookie) {
@@ -300,11 +301,18 @@ export default function(obj) {
     function extractOldPost(data, id, alwaysProxy) {
         const shortcodeMedia = data?.gql_data?.shortcode_media || data?.gql_data?.xdt_shortcode_media;
         const sidecar = shortcodeMedia?.edge_sidecar_to_children;
+
         if (sidecar) {
             const picker = sidecar.edges.filter(e => e.node?.display_url)
                 .map((e, i) => {
                     const type = e.node?.is_video ? "video" : "photo";
-                    const url = type === "video" ? e.node?.video_url : e.node?.display_url;
+
+                    let url;
+                    if (type === 'video') {
+                        url = e.node?.video_url;
+                    } else if (type === 'photo') {
+                        url = e.node?.display_url;
+                    }
 
                     let itemExt = type === "video" ? "mp4" : "jpg";
 
@@ -331,13 +339,17 @@ export default function(obj) {
                 });
 
             if (picker.length) return { picker }
-        } else if (shortcodeMedia?.video_url) {
+        }
+
+        if (shortcodeMedia?.video_url) {
             return {
                 urls: shortcodeMedia.video_url,
                 filename: `instagram_${id}.mp4`,
                 audioFilename: `instagram_${id}_audio`
             }
-        } else if (shortcodeMedia?.display_url) {
+        }
+
+        if (shortcodeMedia?.display_url) {
             return {
                 urls: shortcodeMedia.display_url,
                 isPhoto: true
@@ -504,7 +516,19 @@ export default function(obj) {
         return { error: "link.unsupported" };
     }
 
-    const { postId, storyId, username, alwaysProxy } = obj;
+    const { postId, shareId, storyId, username, alwaysProxy } = obj;
+
+    if (shareId) {
+        return resolveRedirectingURL(
+            `https://www.instagram.com/share/${shareId}/`,
+            dispatcher,
+            'curl/7.88.1'
+        ).then(match => instagram({
+            ...obj, ...match,
+            shareId: undefined
+        }));
+    }
+
     if (postId) return getPost(postId, alwaysProxy);
     if (username && storyId) return getStory(username, storyId);