Bases: Tool
Search the web using DuckDuckGo (no API key required).
Source code in teff/tool/builtin/web_search.py
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52 | class WebSearchTool(Tool):
"""Search the web using DuckDuckGo (no API key required)."""
name = "web_search"
description = "Search the web"
def __init__(self, provider: str = "duckduckgo"):
self.provider = provider
async def arun(self, query: str = "", num_results: int = 5) -> str: # type: ignore[override]
if self.provider == "duckduckgo":
return await self._duckduckgo(query, num_results)
msg = f"unknown web search provider: {self.provider}"
raise ValueError(msg)
async def _duckduckgo(self, query: str, num_results: int) -> str:
url = "https://lite.duckduckgo.com/lite/"
async with httpx.AsyncClient(timeout=15) as client:
response = await client.post(url, data={"q": query})
response.raise_for_status()
import html
text = html.unescape(response.text)
lines = []
count = 0
in_link = False
for part in text.split("<"):
if part.startswith("a "):
in_link = True
continue
if part.startswith("/a"):
in_link = False
continue
if in_link:
if ">" in part:
content = part.split(">", 1)[1]
content = content.strip()
if content and not content.startswith("<"):
lines.append(content)
count += 1
if count >= num_results:
break
return "\n".join(lines) if lines else "no results"
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