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Copy pathlocgov.py
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45 lines (43 loc) · 2.21 KB
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'''
Function:
Implementation of LocGovImageClient
Author:
Zhenchao Jin
WeChat Official Account (微信公众号):
Charles的皮卡丘
'''
import math
import json_repair
from ..utils import ImageInfo
from typing_extensions import Unpack
from urllib.parse import quote, urlencode
from .base import BaseImageClient, BaseImageClientKwargs
'''LocGovImageClient'''
class LocGovImageClient(BaseImageClient):
source = 'LocGovImageClient'
def __init__(self, **kwargs: Unpack[BaseImageClientKwargs]):
super(LocGovImageClient, self).__init__(**kwargs)
self.default_search_headers = {"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36"}
self.default_download_headers = {"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36"}
self.default_headers = self.default_search_headers
self._initsession()
'''_parsesearchresult'''
def _parsesearchresult(self, search_result: str) -> list[ImageInfo]:
# parse json text in safety
search_result: dict = json_repair.loads(search_result)
# parse search result
image_infos: list[ImageInfo] = []
for item in search_result.get("results", []):
if not isinstance(item, dict) or not item.get('image_url'): continue
image_infos.append(ImageInfo(source=self.source, raw_data=item, candidate_download_urls=item["image_url"][::-1], identifier=item["image_url"][::-1][0]))
# return
return image_infos
'''_constructsearchurls'''
def _constructsearchurls(self, keyword: str, search_limits: int = 1000, filters: dict = None, request_overrides: dict = None):
request_overrides, filters, base_url = request_overrides or {}, filters or {}, "https://www.loc.gov/search?"
(params := {"q": keyword, "fo": "json", "fa": "online-format:image", "c": 50, "sp": 1}).update(filters)
search_urls, page_size = [], int(params['c'])
for pn in range(math.ceil(search_limits * 1.2 / page_size)):
params['sp'] = pn + 1
search_urls.append(base_url + urlencode(params, quote_via=quote))
return search_urls