api: support new xiaohongshu links, add fallbacks to getRedirectingURL

closes #1394
Co-authored-by: wukko <me@wukko.me>

api/src/processing/service-config.js

@@ -207,7 +207,7 @@ export const services = {
         patterns: [
             "explore/:id?xsec_token=:token",
             "discovery/item/:id?xsec_token=:token",
-            "a/:shareId"
+            ":shareType/:shareId",
         ],
         altDomains: ["xhslink.com"],
     },

api/src/processing/service-patterns.js

@@ -78,7 +78,7 @@ export const testers = {
 
     "xiaohongshu": pattern =>
         pattern.id?.length <= 24 && pattern.token?.length <= 64
-        || pattern.shareId?.length <= 24,
+        || pattern.shareId?.length <= 24 && pattern.shareType?.length === 1,
 
     "newgrounds": pattern =>
         pattern.id?.length <= 12 || pattern.audioId?.length <= 12,

api/src/processing/services/xiaohongshu.js

@@ -6,13 +6,13 @@ const https = (url) => {
     return url.replace(/^http:/i, 'https:');
 }
 
-export default async function ({ id, token, shareId, h265, isAudioOnly, dispatcher }) {
+export default async function ({ id, token, shareType, shareId, h265, isAudioOnly, dispatcher }) {
     let noteId = id;
     let xsecToken = token;
 
     if (!noteId) {
         const patternMatch = await resolveRedirectingURL(
-            `https://xhslink.com/a/${shareId}`,
+            `https://xhslink.com/${shareType}/${shareId}`,
             dispatcher
         );
 

api/src/processing/url.js

@@ -99,7 +99,7 @@ function aliasURL(url) {
 
         case "xhslink":
             if (url.hostname === 'xhslink.com' && parts.length === 3) {
-                url = new URL(`https://www.xiaohongshu.com/a/${parts[2]}`);
+                url = new URL(`https://www.xiaohongshu.com/${parts[1]}/${parts[2]}`);
             }
             break;