fix: 修复特殊字符标题搜索匹配失败 (#337)

* fix: 修复特殊字符标题搜索匹配失败

改动详情：

- 使用 URL.searchParams 构造内部 /search/anime 搜索地址
- 避免标题中的 & 等特殊字符被当作查询参数分隔符截断
- 补充回归测试，验证 keyword、season、episode 参数保持正确

* refactor: 简化搜索地址构造调用

danmu_api/apis/dandan-api.js

@@ -1402,6 +1402,21 @@ export async function extractTitleSeasonEpisode(cleanFileName) {
   return {title, season, episode, year};
 }
 
+export function buildSearchAnimeUrl(baseUrl, keyword, season, episode) {
+  const searchUrl = new URL(baseUrl);
+  const apiPrefix = searchUrl.pathname.replace(/\/(?:match|search\/episodes)$/, '');
+  searchUrl.pathname = `${apiPrefix}/search/anime`;
+  searchUrl.search = '';
+  searchUrl.searchParams.set('keyword', keyword || '');
+  if (season !== undefined) {
+    searchUrl.searchParams.set('season', season || '');
+  }
+  if (episode !== undefined) {
+    searchUrl.searchParams.set('episode', episode || '');
+  }
+  return searchUrl;
+}
+
 // Extracted function for POST /api/v2/match
 export async function matchAnime(url, req, clientIp) {
   try {
@@ -1460,7 +1475,7 @@ export async function matchAnime(url, req, clientIp) {
     const targetPlatform = dynamicPlatformOrder.length > 0 ? dynamicPlatformOrder[0] : null;
 
     const requestAnimeDetailsMap = new Map();
-    let originSearchUrl = new URL(req.url.replace("/match", `/search/anime?keyword=${title}&season=${season || ''}&episode=${episode || ''}`));
+    let originSearchUrl = buildSearchAnimeUrl(req.url, title, season, episode);
     const searchRes = await searchAnime(originSearchUrl, preferAnimeId, preferSource, requestAnimeDetailsMap, targetPlatform);
     const searchData = await searchRes.json();
     log("info", `[system] [Match] searchData: ${searchData.animes}`);
@@ -1564,7 +1579,7 @@ export async function searchEpisodes(url) {
   }
 
   // 先搜索动漫
-  let searchUrl = new URL(`/search/anime?keyword=${anime}`, url.origin);
+  let searchUrl = buildSearchAnimeUrl(url, anime);
   const requestAnimeDetailsMap = new Map();
 
   const searchRes = await searchAnime(searchUrl, null, null, requestAnimeDetailsMap);

danmu_api/worker.test.js

@@ -5,7 +5,7 @@ dotenv.config();
 import test from 'node:test';
 import assert from 'node:assert';
 import { handleRequest } from './worker.js';
-import { extractTitleSeasonEpisode, getBangumi, getComment, matchAnime, searchAnime } from "./apis/dandan-api.js";
+import { extractTitleSeasonEpisode, getBangumi, getComment, matchAnime, searchAnime, buildSearchAnimeUrl } from "./apis/dandan-api.js";
 import { getRedisKey, pingRedis, setRedisKey, setRedisKeyWithExpiry } from "./utils/redis-util.js";
 import { getLocalRedisKey, setLocalRedisKey, setLocalRedisKeyWithExpiry } from "./utils/local-redis-util.js";
 import { getImdbepisodes } from "./utils/imdb-util.js";
@@ -206,6 +206,25 @@ test('worker.js API endpoints', async (t) => {
     assert.equal(seenRedirectMode, 'manual');
   });
 
+  await t.test('buildSearchAnimeUrl should preserve special characters in keyword', async () => {
+    const searchUrl = buildSearchAnimeUrl(`${urlPrefix}/api/v2/match`, 'Love & Death', 1, 2);
+
+    assert.equal(searchUrl.pathname, '/api/v2/search/anime');
+    assert.equal(searchUrl.searchParams.get('keyword'), 'Love & Death');
+    assert.equal(searchUrl.searchParams.get('season'), '1');
+    assert.equal(searchUrl.searchParams.get('episode'), '2');
+    assert.equal(searchUrl.searchParams.has(' Death'), false);
+  });
+
+  await t.test('buildSearchAnimeUrl should derive /search/anime from /search/episodes requests', async () => {
+    const searchUrl = buildSearchAnimeUrl(`${urlPrefix}/api/v2/search/episodes?anime=Love%20%26%20Death&episode=2`, 'Love & Death');
+
+    assert.equal(searchUrl.pathname, '/api/v2/search/anime');
+    assert.equal(searchUrl.searchParams.get('keyword'), 'Love & Death');
+    assert.equal(searchUrl.searchParams.has('season'), false);
+    assert.equal(searchUrl.searchParams.has('episode'), false);
+  });
+
   // 测试标题解析
   await t.test('PARSE TitleSeasonEpisode', async () => {
     let title, season, episode;