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Add agent component for web crawler (#2878)
### What problem does this PR solve? Add agent component for web crawler ### Type of change - [x] New Feature (non-breaking change which adds functionality)
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# | ||
# Copyright 2024 The InfiniFlow Authors. All Rights Reserved. | ||
# | ||
# Licensed under the Apache License, Version 2.0 (the "License"); | ||
# you may not use this file except in compliance with the License. | ||
# You may obtain a copy of the License at | ||
# | ||
# http://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, software | ||
# distributed under the License is distributed on an "AS IS" BASIS, | ||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
# See the License for the specific language governing permissions and | ||
# limitations under the License. | ||
# | ||
from abc import ABC | ||
import asyncio | ||
from crawl4ai import AsyncWebCrawler | ||
from agent.component.base import ComponentBase, ComponentParamBase | ||
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class CrawlerParam(ComponentParamBase): | ||
""" | ||
Define the Crawler component parameters. | ||
""" | ||
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def __init__(self): | ||
super().__init__() | ||
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def check(self): | ||
return True | ||
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class Crawler(ComponentBase, ABC): | ||
component_name = "Crawler" | ||
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def _run(self, history, **kwargs): | ||
ans = self.get_input() | ||
ans = " - ".join(ans["content"]) if "content" in ans else "" | ||
if not ans: | ||
return Crawler.be_output("") | ||
try: | ||
result = asyncio.run(self.get_web(ans)) | ||
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return Crawler.be_output(result) | ||
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except Exception as e: | ||
return Crawler.be_output(f"An unexpected error occurred: {str(e)}") | ||
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async def get_web(self, url): | ||
proxy = self._param.proxy if self._param.proxy else None | ||
async with AsyncWebCrawler(verbose=True, proxy=proxy) as crawler: | ||
result = await crawler.arun( | ||
url=url, | ||
bypass_cache=True | ||
) | ||
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match self._param.extract_type: | ||
case 'html': | ||
return result.cleaned_html | ||
case 'markdown': | ||
return result.markdown | ||
case 'content': | ||
return result.extracted_content | ||
case _: | ||
return result.markdown | ||
# print(result.markdown) | ||
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import { useTranslate } from '@/hooks/common-hooks'; | ||
import { Form, Input, Select } from 'antd'; | ||
import { useMemo } from 'react'; | ||
import { CrawlerResultOptions } from '../../constant'; | ||
import { IOperatorForm } from '../../interface'; | ||
const CrawlerForm = ({ onValuesChange, form }: IOperatorForm) => { | ||
const { t } = useTranslate('flow'); | ||
const crawlerResultOptions = useMemo(() => { | ||
return CrawlerResultOptions.map((x) => ({ | ||
value: x, | ||
label: t(`crawlerResultOptions.${x}`), | ||
})); | ||
}, [t]); | ||
return ( | ||
<Form | ||
name="basic" | ||
labelCol={{ span: 6 }} | ||
wrapperCol={{ span: 18 }} | ||
autoComplete="off" | ||
form={form} | ||
onValuesChange={onValuesChange} | ||
> | ||
<Form.Item label={t('proxy')} name={'proxy'}> | ||
<Input placeholder="like: http://127.0.0.1:8888"></Input> | ||
</Form.Item> | ||
<Form.Item | ||
label={t('extractType')} | ||
name={'extract_type'} | ||
initialValue="markdown" | ||
> | ||
<Select options={crawlerResultOptions}></Select> | ||
</Form.Item> | ||
</Form> | ||
); | ||
}; | ||
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export default CrawlerForm; |