mirror of
https://github.com/hwchase17/langchain
synced 2024-11-02 09:40:22 +00:00
30bca57aae
Make sure the doc list is not empty, and set Metadata: true in param, to enable the user to disable metadata for slightly faster crawls.
95 lines
3.3 KiB
Python
95 lines
3.3 KiB
Python
from typing import Iterator, Literal, Optional
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from langchain_core.document_loaders import BaseLoader
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from langchain_core.documents import Document
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from langchain_core.utils import get_from_env
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class SpiderLoader(BaseLoader):
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"""Load web pages as Documents using Spider AI.
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Must have the Python package `spider-client` installed and a Spider API key.
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See https://spider.cloud for more.
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"""
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def __init__(
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self,
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url: str,
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*,
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api_key: Optional[str] = None,
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mode: Literal["scrape", "crawl"] = "scrape",
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params: Optional[dict] = None,
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):
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"""Initialize with API key and URL.
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Args:
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url: The URL to be processed.
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api_key: The Spider API key. If not specified, will be read from env
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var `SPIDER_API_KEY`.
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mode: The mode to run the loader in. Default is "scrape".
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Options include "scrape" (single page) and "crawl" (with deeper
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crawling following subpages).
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params: Additional parameters for the Spider API.
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"""
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if params is None:
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params = {
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"return_format": "markdown",
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"metadata": True,
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} # Using the metadata param slightly slows down the output
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try:
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from spider import Spider
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except ImportError:
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raise ImportError(
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"`spider` package not found, please run `pip install spider-client`"
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)
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if mode not in ("scrape", "crawl"):
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raise ValueError(
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f"Unrecognized mode '{mode}'. Expected one of 'scrape', 'crawl'."
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)
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# Use the environment variable if the API key isn't provided
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api_key = api_key or get_from_env("api_key", "SPIDER_API_KEY")
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self.spider = Spider(api_key=api_key)
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self.url = url
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self.mode = mode
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self.params = params
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def lazy_load(self) -> Iterator[Document]:
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"""Load documents based on the specified mode."""
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spider_docs = []
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if self.mode == "scrape":
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# Scrape a single page
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response = self.spider.scrape_url(self.url, params=self.params)
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if response:
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spider_docs.append(response)
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elif self.mode == "crawl":
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# Crawl multiple pages
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response = self.spider.crawl_url(self.url, params=self.params)
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if response:
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spider_docs.extend(response)
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for doc in spider_docs:
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if self.mode == "scrape":
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# Ensure page_content is also not None
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page_content = doc[0].get("content", "")
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# Ensure metadata is also not None
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metadata = doc[0].get("metadata", {})
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if page_content is not None:
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yield Document(page_content=page_content, metadata=metadata)
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if self.mode == "crawl":
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# Ensure page_content is also not None
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page_content = doc.get("content", "")
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# Ensure metadata is also not None
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metadata = doc.get("metadata", {})
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if page_content is not None:
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yield Document(
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page_content=page_content,
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metadata=metadata,
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)
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