PixivResolverを追加

app/MetadataResolver/MetadataResolver.php

@@ -12,6 +12,7 @@ class MetadataResolver implements Resolver
         '~ec\.toranoana\.jp/tora_r/ec/item/.*~' => ToranoanaResolver::class,
         '~iwara\.tv/videos/.*~' => IwaraResolver::class,
         '~www\.dlsite\.com/.*/work/=/product_id/..\d+\.html~' => DLsiteResolver::class,
+        '~www\.pixiv\.net/member_illust\.php\?illust_id=\d+~' => PixivResolver::class,
         '/.*/' => OGPResolver::class
     ];
 

app/MetadataResolver/PixivResolver.php

@@ -0,0 +1,88 @@
+<?php
+
+namespace App\MetadataResolver;
+
+use Illuminate\Support\Facades\Log;
+
+class PixivResolver implements Resolver
+{
+    public function thumbnail_to_master_url(string $url):string {
+        // 最大長辺 1200 の画像に変換
+        $url = str_replace("/c/128x128", "", $url);
+        $url = str_replace("square1200.jpg", "master1200.jpg", $url);
+        return $url;
+    }
+
+    public function proxize(string $url):string {
+        // pixiv.cat のプロキシ URL に変換する
+        $url = str_replace("i.pximg.net", "i.pixiv.cat", $url);
+        return $url;
+    }
+
+    public function resolve(string $url): Metadata
+    {
+        preg_match("~illust_id=(\d+)~", parse_url($url)["query"], $illust_id);
+        $illust_id = $illust_id[1];
+
+        // 漫画ページかつページ数あり
+        if (strpos(parse_url($url)["query"], "mode=manga_big") && strpos(parse_url($url)["query"], "page=")) {
+            preg_match("~page=(\d+)~", parse_url($url)["query"], $match);
+            $page = $match[1];
+
+            // 未ログインでは漫画ページを開けないため、URL を作品ページに変換する
+            Log::debug($url);
+            $url = str_replace("mode=manga_big", "mode=medium", $url);
+            Log::debug($url);
+
+            $client = new \GuzzleHttp\Client();
+            $res = $client->get($url);
+            if ($res->getStatusCode() === 200) {
+                $ogpResolver = new OGPResolver();
+                $metadata = $ogpResolver->parse($res->getBody());
+
+                preg_match("~https://i\.pximg\.net/c/128x128/img-master/img/\d{4}/\d{2}/\d{2}/\d{2}/\d{2}/\d{2}/{$illust_id}_p0_square1200\.jpg~", $res->getBody(), $match);
+                $illust_thumbnail_url = $match[0];
+                Log::debug($illust_thumbnail_url);
+
+                $illust_url = $this->thumbnail_to_master_url($illust_thumbnail_url);
+                Log::debug($illust_url);
+
+                // 指定ページに変換
+                $illust_url = str_replace("p0_master", "p{$page}_master", $illust_url);
+                Log::debug($illust_url);
+
+                $metadata->image =  $this->proxize($illust_url);;
+
+                return $metadata;
+            } else {
+                throw new \RuntimeException("{$res->getStatusCode()}: $url");
+            }
+        }else {
+            $client = new \GuzzleHttp\Client();
+            $res = $client->get($url);
+            if ($res->getStatusCode() === 200) {
+                $ogpResolver = new OGPResolver();
+                $metadata = $ogpResolver->parse($res->getBody());
+
+                // OGP がデフォルト画像であるようならなんとかして画像を取得する
+                if (strpos($metadata->image, "pixiv_logo.gif") || strpos($metadata->image, "pictures.jpg")) {
+
+                    // 作品ページの場合のみ対応
+                    if(strpos(parse_url($url)["query"], "mode=medium")){
+                        preg_match("~https://i\.pximg\.net/c/128x128/img-master/img/\d{4}/\d{2}/\d{2}/\d{2}/\d{2}/\d{2}/{$illust_id}(_p0)?_square1200\.jpg~", $res->getBody(), $match);
+                        $illust_thumbnail_url = $match[0];
+
+                        $illust_url = $this->thumbnail_to_master_url($illust_thumbnail_url);
+
+                        $metadata->image =  $this->proxize($illust_url);;
+                    }
+                }
+
+                return $metadata;
+            } else {
+                throw new \RuntimeException("{$res->getStatusCode()}: $url");
+            }
+
+        }
+    }
+}