PixivComics : get salt from chapter JSON (#7402)

😞

src/web/mjs/connectors/PixivComics.mjs

@@ -15,12 +15,13 @@ export default class PixivComics extends Connector {
         this.apiURL = 'https://comic.pixiv.net/api/app/';
         this.requestOptions.headers.set('x-referer', this.url);
         this.requestOptions.headers.set('x-requested-with', 'pixivcomic');
-        this.salt = 'M7w5HORvvX-VP4tRj2CFQOQFPocBqLvHTIbhTU36UCo';
+        this.nextBuild = 'qLzb8dhGOIox-xYNKI0tH';
     }
 
     async _initializeConnector() {
-        const request = new Request(new URL('viewer/stories/0', this.url), this.requestOptions);
-        this.salt = await Engine.Request.fetchUI(request, `JSON.parse(document.querySelector('#__NEXT_DATA__').text).props.pageProps.salt`);
+        const request = new Request(new URL(this.url), this.requestOptions);
+        const build = await Engine.Request.fetchUI(request, `__NEXT_DATA__.buildId`);
+        this.nextBuild = build ? build : this.nextBuild; //linter doesnt support ?? syntax
     }
 
     async _getMangaFromURI(uri) {
@@ -81,8 +82,11 @@ export default class PixivComics extends Connector {
     }
 
     async _getPages(chapter) {
+
+        const { pageProps: { salt } } = await this.fetchJSON(new Request(new URL(`/_next/data/${this.nextBuild}/viewer/stories/${chapter.id}.json?id=${chapter.id}`, this.url)));
+
         const timestamp = new Date().toISOString().replace(/\.\d+Z$/, 'Z');
-        const hash = CryptoJS.SHA256(timestamp + this.salt).toString(CryptoJS.enc.Hex);
+        const hash = CryptoJS.SHA256(timestamp + salt).toString(CryptoJS.enc.Hex);
         const uri = new URL(`episodes/${chapter.id}/read_v4`, this.apiURL);
         const request = new Request(uri, this.requestOptions);
         request.headers.set('x-requested-with', 'pixivcomic');