mirror of
https://github.com/hwchase17/langchain
synced 2024-11-08 07:10:35 +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
|
|
|
|
from langchain_core.document_loaders import BaseLoader
|
|
from langchain_core.documents import Document
|
|
from langchain_core.utils import get_from_env
|
|
|
|
|
|
class SpiderLoader(BaseLoader):
|
|
"""Load web pages as Documents using Spider AI.
|
|
|
|
Must have the Python package `spider-client` installed and a Spider API key.
|
|
See https://spider.cloud for more.
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
url: str,
|
|
*,
|
|
api_key: Optional[str] = None,
|
|
mode: Literal["scrape", "crawl"] = "scrape",
|
|
params: Optional[dict] = None,
|
|
):
|
|
"""Initialize with API key and URL.
|
|
|
|
Args:
|
|
url: The URL to be processed.
|
|
api_key: The Spider API key. If not specified, will be read from env
|
|
var `SPIDER_API_KEY`.
|
|
mode: The mode to run the loader in. Default is "scrape".
|
|
Options include "scrape" (single page) and "crawl" (with deeper
|
|
crawling following subpages).
|
|
params: Additional parameters for the Spider API.
|
|
"""
|
|
if params is None:
|
|
params = {
|
|
"return_format": "markdown",
|
|
"metadata": True,
|
|
} # Using the metadata param slightly slows down the output
|
|
|
|
try:
|
|
from spider import Spider
|
|
except ImportError:
|
|
raise ImportError(
|
|
"`spider` package not found, please run `pip install spider-client`"
|
|
)
|
|
if mode not in ("scrape", "crawl"):
|
|
raise ValueError(
|
|
f"Unrecognized mode '{mode}'. Expected one of 'scrape', 'crawl'."
|
|
)
|
|
|
|
# Use the environment variable if the API key isn't provided
|
|
api_key = api_key or get_from_env("api_key", "SPIDER_API_KEY")
|
|
self.spider = Spider(api_key=api_key)
|
|
self.url = url
|
|
self.mode = mode
|
|
self.params = params
|
|
|
|
def lazy_load(self) -> Iterator[Document]:
|
|
"""Load documents based on the specified mode."""
|
|
spider_docs = []
|
|
|
|
if self.mode == "scrape":
|
|
# Scrape a single page
|
|
response = self.spider.scrape_url(self.url, params=self.params)
|
|
if response:
|
|
spider_docs.append(response)
|
|
elif self.mode == "crawl":
|
|
# Crawl multiple pages
|
|
response = self.spider.crawl_url(self.url, params=self.params)
|
|
if response:
|
|
spider_docs.extend(response)
|
|
|
|
for doc in spider_docs:
|
|
if self.mode == "scrape":
|
|
# Ensure page_content is also not None
|
|
page_content = doc[0].get("content", "")
|
|
|
|
# Ensure metadata is also not None
|
|
metadata = doc[0].get("metadata", {})
|
|
|
|
if page_content is not None:
|
|
yield Document(page_content=page_content, metadata=metadata)
|
|
if self.mode == "crawl":
|
|
# Ensure page_content is also not None
|
|
page_content = doc.get("content", "")
|
|
|
|
# Ensure metadata is also not None
|
|
metadata = doc.get("metadata", {})
|
|
|
|
if page_content is not None:
|
|
yield Document(
|
|
page_content=page_content,
|
|
metadata=metadata,
|
|
)
|