from __future__ import annotations
from aiohttp import ClientSession, ClientTimeout
try:
from duckduckgo_search import DDGS
from bs4 import BeautifulSoup
has_requirements = True
except ImportError:
has_requirements = False
from ...errors import MissingRequirementsError
import asyncio
class SearchResults():
def __init__(self, results: list):
self.results = results
def __iter__(self):
yield from self.results
def __str__(self):
search = ""
for idx, result in enumerate(self.results):
if search:
search += "\n\n\n"
search += f"Title: {result.title}\n\n"
if result.text:
search += result.text
else:
search += result.snippet
search += f"\n\nSource: [[{idx}]]({result.url})"
return search
def __len__(self) -> int:
return len(self.results)
class SearchResultEntry():
def __init__(self, title: str, url: str, snippet: str, text: str = None):
self.title = title
self.url = url
self.snippet = snippet
self.text = text
def set_text(self, text: str):
self.text = text
def scrape_text(html: str, max_words: int = None) -> str:
soup = BeautifulSoup(html, "html.parser")
for exclude in soup(["script", "style"]):
exclude.extract()
for selector in [
"main",
".main-content-wrapper",
".main-content",
".emt-container-inner",
".content-wrapper",
"#content",
"#mainContent",
]:
select = soup.select_one(selector)
if select:
soup = select
break
# Zdnet
for remove in [".c-globalDisclosure"]:
select = soup.select_one(remove)
if select:
select.extract()
clean_text = ""
for paragraph in soup.select("p, h1, h2, h3, h4, h5, h6"):
text = paragraph.get_text()
for line in text.splitlines():
words = []
for word in line.replace("\t", " ").split(" "):
if word:
words.append(word)
count = len(words)
if not count:
continue
if max_words:
max_words -= count
if max_words <= 0:
break
if clean_text:
clean_text += "\n"
clean_text += " ".join(words)
return clean_text
async def fetch_and_scrape(session: ClientSession, url: str, max_words: int = None) -> str:
try:
async with session.get(url) as response:
if response.status == 200:
html = await response.text()
return scrape_text(html, max_words)
except:
return
async def search(query: str, n_results: int = 5, max_words: int = 2500, add_text: bool = True) -> SearchResults:
if not has_requirements:
raise MissingRequirementsError('Install "duckduckgo-search" and "beautifulsoup4" package')
async with AsyncDDGS() as ddgs:
results = []
for result in await ddgs.atext(
query,
region="wt-wt",
safesearch="moderate",
timelimit="y",
max_results=n_results
):
results.append(SearchResultEntry(
result["title"],
result["href"],
result["body"]
))
if add_text:
requests = []
async with ClientSession(timeout=ClientTimeout(5)) as session:
for entry in results:
requests.append(fetch_and_scrape(session, entry.url, int(max_words / (n_results - 1))))
texts = await asyncio.gather(*requests)
formatted_results = []
left_words = max_words
for i, entry in enumerate(results):
if add_text:
entry.text = texts[i]
if left_words:
left_words -= entry.title.count(" ") + 5
if entry.text:
left_words -= entry.text.count(" ")
else:
left_words -= entry.snippet.count(" ")
if 0 > left_words:
break
formatted_results.append(entry)
return SearchResults(formatted_results)
def get_search_message(prompt) -> str:
try:
search_results = asyncio.run(search(prompt))
message = f"""
{search_results}
Instruction: Using the provided web search results, to write a comprehensive reply to the user request.
Make sure to add the sources of cites using [[Number]](Url) notation after the reference. Example: [[0]](http://google.com)
User request:
{prompt}
"""
return message
except Exception as e:
print("Couldn't do web search:", e)
return prompt
