From c5c302ce5151eff8a6bc182869ee065fd30b7da2 Mon Sep 17 00:00:00 2001
From: p7mpv4cbt <1352787923@qq.com>
Date: Wed, 5 Nov 2025 11:29:39 +0800
Subject: [PATCH] ADD file via upload

---
 BiliBiliCrawler.java | 69 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 BiliBiliCrawler.java

diff --git a/BiliBiliCrawler.java b/BiliBiliCrawler.java
new file mode 100644
index 0000000..60e33a6
--- /dev/null
+++ b/BiliBiliCrawler.java
@@ -0,0 +1,69 @@
+// src/main/java/com/llm/analysis/BiliBiliCrawler.java
+package com.llm.analysis;
+
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
+import com.google.gson.JsonParser;
+import com.google.gson.JsonObject;
+import java.io.IOException;
+
+public class BiliBiliCrawler {
+
+    private static final String DM_BASE_URL = "https://comment.bilibili.com/";
+    // 新增：用于通过 BVID 获取 CID 的 API
+    private static final String PAGELIST_API = "https://api.bilibili.com/x/player/pagelist"; 
+    
+    // User-Agent 保持一致，防止被服务器识别为不同来源
+    private static final String USER_AGENT = 
+            "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36";
+
+
+    /**
+     * 根据 BVID 获取视频的 CID (用于弹幕请求)。
+     * @param bvid 视频的BVID
+     * @return 视频的CID字符串，如果失败返回null
+     */
+    public static String getCidFromBvid(String bvid) {
+        String url = String.format("%s?bvid=%s", PAGELIST_API, bvid);
+        try {
+            // 访问 pagelist API
+            String jsonStr = Jsoup.connect(url)
+                    .ignoreContentType(true)
+                    .userAgent(USER_AGENT) 
+                    .execute()
+                    .body();
+
+            // 注意：新版 Gson 使用 parseString
+            JsonObject jsonResponse = JsonParser.parseString(jsonStr).getAsJsonObject();
+            
+            if (jsonResponse.get("code").getAsInt() == 0) {
+                // CID 通常在 data 数组的第一个元素里
+                return jsonResponse.getAsJsonArray("data")
+                                   .get(0).getAsJsonObject()
+                                   .get("cid").getAsString();
+            }
+        } catch (Exception e) {
+            // 错误处理，但不再打印红色错误，而是安静失败
+        }
+        return null;
+    }
+
+    /**
+     * 根据CID获取弹幕的原始XML内容。
+     * @param cid 视频的CID
+     * @return 弹幕XML字符串
+     */
+    public static String getDanmuXml(String cid) {
+        String url = DM_BASE_URL + cid + ".xml";
+        try {
+            Document doc = Jsoup.connect(url)
+                    .userAgent(USER_AGENT)
+                    .ignoreContentType(true)
+                    .get();
+            return doc.outerHtml(); 
+        } catch (IOException e) {
+            // 失败时返回 null
+            return null;
+        }
+    }
+}
\ No newline at end of file