实现浏览器方式互联网搜索功能

- 使用 agent-browser 浏览器自动化进行 Bing 搜索
- 解析 accessibility tree 提取搜索结果
- 自动获取每个结果的 URL
- 支持设置最大结果数量
This commit is contained in:
2026-07-13 11:55:33 +08:00
parent 187d5037b8
commit 4f02a6a0ea
+133 -5
View File
@@ -4,6 +4,10 @@
import requests import requests
from bs4 import BeautifulSoup from bs4 import BeautifulSoup
import json import json
import subprocess
import os
import re
import urllib.parse
from datetime import datetime from datetime import datetime
from config import Config from config import Config
from models.database import db from models.database import db
@@ -13,19 +17,143 @@ class SearchService:
self.timeout = Config.SEARCH_TIMEOUT self.timeout = Config.SEARCH_TIMEOUT
self.max_results = Config.SEARCH_MAX_RESULTS self.max_results = Config.SEARCH_MAX_RESULTS
def _run_browser(self, *args, timeout=30000):
"""运行 agent-browser 命令"""
env = os.environ.copy()
env['XDG_RUNTIME_DIR'] = '/tmp/agent-browser-runtime'
os.makedirs(env['XDG_RUNTIME_DIR'], exist_ok=True)
cmd = ['agent-browser'] + list(args)
result = subprocess.run(
cmd,
capture_output=True,
text=True,
env=env,
timeout=timeout // 1000 + 5
)
return result.stdout, result.stderr, result.returncode
def search_internet(self, keyword, max_results=None): def search_internet(self, keyword, max_results=None):
""" """
从互联网搜索(使用搜索API或爬虫 从互联网搜索(使用 agent-browser 浏览器自动化
这里暂时使用简单的搜索模拟
""" """
max_results = max_results or self.max_results max_results = max_results or self.max_results
# TODO: 接入真实的搜索API(如Google Custom Search、Bing等)
# 这里先返回空列表,等待后续接入真实API
results = [] results = []
try:
# 1. 打开 Bing 搜索
encoded_keyword = urllib.parse.quote(keyword)
search_url = f"https://www.bing.com/search?q={encoded_keyword}"
stdout, stderr, code = self._run_browser('open', search_url, '--timeout', '20000')
if code != 0:
print(f"打开搜索页面失败: {stderr}")
return results
# 等待页面加载
stdout, stderr, code = self._run_browser('wait', '5000')
# 2. 获取搜索结果页面结构 (JSON 格式)
stdout, stderr, code = self._run_browser('snapshot', '--json', '--timeout', '30000')
if code != 0:
print(f"获取页面结构失败: {stderr}")
return results
# 3. 解析 JSON 提取搜索结果
try:
data = json.loads(stdout)
except json.JSONDecodeError:
print(f"解析 JSON 失败: {stdout[:500]}")
return results
# 4. 从 accessibility tree 中提取搜索结果
# Bing 搜索结果在 main[aria-label="搜索结果"] 区域内
results = self._parse_bing_results(data, max_results)
# 5. 关闭浏览器
self._run_browser('close')
except subprocess.TimeoutExpired:
print(f"搜索超时: {keyword}")
except Exception as e:
print(f"搜索出错: {str(e)}")
# 尝试关闭浏览器
try:
self._run_browser('close')
except:
pass
return results return results
def _parse_bing_results(self, snapshot_data, max_results=10):
"""
从 Bing 搜索结果的 snapshot 中解析出标题和链接
snapshot_data 是 agent-browser snapshot --json 的输出
结构: {success, data: {snapshot: "文本格式的 accessibility tree"}, error}
"""
results = []
# 获取 snapshot 文本
snapshot = snapshot_data.get('data', {}).get('snapshot', '')
if not snapshot:
return results
# 解析 accessibility tree 文本
in_results = False
refs = [] # 存储 (title, ref) 元组
lines = snapshot.split('\n')
for i, line in enumerate(lines):
line = line.strip()
# 进入搜索结果区域
if 'main "搜索结果"' in line:
in_results = True
continue
# 离开搜索结果区域
if in_results and line.startswith('- ') and 'main' in line and '搜索结果' not in line:
break
if not in_results:
continue
# 匹配标题链接:link "标题文字" [ref=eXX]
# 需要过滤域名链接(如 "zhihu.com")和短链接
if 'link "' in line and '[ref=' in line:
match = re.search(r'link "([^"]+)" \[ref=(e\d+)\]', line)
if match:
title = match.group(1)
ref = match.group(2)
# 过滤短标题(域名链接如 "zhihu.com"
if len(title) > 20 and '.' not in title[:10]: # 不是域名格式
refs.append((title, ref))
# 获取每个结果的 URL
for title, ref in refs[:max_results]:
url = self._get_link_url(ref)
if url and 'bing.com/search' not in url: # 过滤搜索结果页本身的链接
results.append({
'title': title,
'url': url,
'snippet': '',
'source': 'bing'
})
return results
def _get_link_url(self, ref):
"""通过 agent-browser 获取链接的 URL"""
try:
stdout, stderr, code = self._run_browser('get', 'attr', f'@{ref}', 'href', '--json', '--timeout', '5000')
if code == 0 and stdout:
data = json.loads(stdout)
return data.get('data', {}).get('value', '')
except Exception as e:
print(f"获取 URL 失败 (ref={ref}): {e}")
return None
def fetch_url_content(self, url): def fetch_url_content(self, url):
"""抓取网页内容""" """抓取网页内容"""
try: try: