import re
import time
import json
import execjs
import requests
from urllib.parse import urljoin, urlparse
class LanZouCloudParser:
def
__init__ (self
):
# 定义JavaScript计算函数
self.acw_js_code = """
var MASK_B64="MzAwMDE3NjAwMDg1NjAwNjA2MTUwMTUzMzAwMzY5MDAyNzgwMDM3NQ==";
var POS_LIST=
[15,35,29,24,33,16,1,38,10,9,19,31,40,27,22,23,25,13,6,11,39,18,20,8,14,21,32,26,2,30,7,4,17,5,3,28,34,37,12,36
];
function
base64Decode (str
){var chars= var output= var buffer=0,bits=0;
for (var i=0;i<str.length;i++
){var c=chars.
indexOf (str.
charAt (i
));
if (c<0
)continue;
buffer=
(buffer<<6
)|c;
bits+=6;
if (bits>=8
){bits-=8;
output+=String.
fromCharCode ( (buffer>>bits
)&0xFF
);
}}return output;
}function
compute_acw_sc_v2 (arg1
){var posToIdx=
{};
for (var i=0;i<pos_list.length;i++
)postoidx
[pos_list
[i
]]=i;
var output=
[];
for (var j=1;j<=arg1.length;j++
){var idx=posToIdx
[j
];
if (typeof idx=== output
[idx
]=arg1.
charAt (j-1
);
}}var rearranged=output.
join ( var mask=
base64Decode (MASK_B64
);
var result= var k=0;
while (k<rearranged.length&&k<mask.length
){var dataChunkText=rearranged.
substr (k,2
);
var maskChunkText=mask.
substr (k,2
);
if (!dataChunkText||!maskChunkText
)break;
var dataChunk=
parseInt (dataChunkText,16
);
var maskChunk=
parseInt (maskChunkText,16
);
var xorVal=dataChunk^maskChunk;
var hex=xorVal.
toString (16
);
if (hex.length<2
)hex= result+=hex;
k+=2;
}return result.
toLowerCase ();
}"""
# 编译JavaScript
self.ctx = execjs.
compile (self.acw_js_code
) # 请求头
self.headers =
{ } # 创建会话，自动处理cookies
self.session = requests.
Session ()self.session.headers.
update (self.headers
)def
compute_acw_sc_v2 (self, arg1
):
"""计算acw_sc__v2值"""
try:
result = self.ctx.
call ( return result
except Exception as e:
print (f"JavaScript计算错误:
{e
}"
)return ""
def
extract_file_id_from_page (self, html_content
):
"""从HTML页面中提取文件ID"""
# 从报告链接中提取（最常见）
# 格式: /q/jb/?f=271513649&report=1
report_match = re.
search (r if report_match:
return report_match.
group (1
) # 尝试其他可能的模式
file_match = re.
search (r if file_match:
return file_match.
group (1
)return "271513649"
# 默认值
def
parse_fn_page (self, fn_url, original_page_html
):
"""解析fn页面，获取最终下载链接"""
try:
print (f"访问fn页面:
{fn_url
}"
) # 先提取文件ID（从原始页面）
file_id = self.
extract_file_id_from_page (original_page_html
)print (f"使用的文件ID:
{file_id
}"
) # 访问fn页面
response = self.session.
get (fn_url
)response.
raise_for_status ()html_content = response.text
print (f"fn页面长度:
{len (html_content
)}"
) # 提取关键参数
# 1. 提取 wp_sign
wp_sign_match = re.
search (r"var wp_sign = if wp_sign_match:
wp_sign = wp_sign_match.
group (1
)print (f"提取到wp_sign:
{wp_sign
}"
)else:
print ("未找到wp_sign"
)return None
# 2. 提取 ajaxdata（通常是 VJvp）
ajaxdata_match = re.
search (r"var ajaxdata = if ajaxdata_match:
ajaxdata = ajaxdata_match.
group (1
)print (f"提取到ajaxdata:
{ajaxdata
}"
)else:
# 使用默认值
ajaxdata = "VJvp"
print (f"使用默认ajaxdata:
{ajaxdata
}"
) # 3. 构建正确的ajax_url（使用正确的文件ID）
base_url = f"
{urlparse (fn_url
).scheme
}:
//{urlparse (fn_url
).netloc
}"
ajax_url = f"
{base_url
}/ajaxm.php?file=
{file_id
}"
print (f"构建的ajax_url:
{ajax_url
}"
) # 构建POST数据
post_data =
{ }print (f"POST数据:
{post_data
}"
) # 设置AJAX请求头
ajax_headers =
{ } # 立即发送AJAX请求
print (f"发送POST请求到:
{ajax_url
}"
)ajax_response = self.session.
post (ajax_url, data=post_data, headers=ajax_headers
)print (f"AJAX响应状态码:
{ajax_response.status_code
}"
) # 检查响应内容
response_text = ajax_response.text
print (f"AJAX响应内容:
{response_text
[:200
]}..."
) # 尝试解析JSON
try:
json_data = ajax_response.
json ()print (f"解析到的JSON: json_data"
) # 修正：zt=1 表示成功
if json_data.
get ( dom = json_data.
get ( url = json_data.
get ( if url and dom:
# 处理转义字符
dom = dom.
replace ( url = url.
replace ( # 构建最终下载链接
# 注意：url 以 if url.
startswith ( download_url = f"
{dom
}/file
{url
}"
else:
download_url = f"
{dom
}/file/
{url
}"
print (f"最终下载链接:
{download_url
}"
)return download_url
else:
print (f"缺少必要字段: dom=
{dom
}, url=
{url
}"
)else:
print (f"状态不为1:
{json_data.
get ( print (f"错误信息:
{json_data.
get ( except json.JSONDecodeError as e:
print (f"JSON解析错误:
{e
}"
)print (f"完整响应:
{response_text
}"
)return None
except requests.exceptions.RequestException as e:
print (f"请求错误:
{e
}"
)return None
except Exception as e:
print (f"解析错误:
{e
}"
)return None
def
parse_lanzou_url (self, url
):
"""解析蓝奏云链接"""
try:
print (f"正在解析链接:
{url
}"
) # 第一次请求
print ("第一次请求..."
)response = self.session.
get (url
)response.
raise_for_status () # 打印cookies信息
print (f"第一次响应Cookies:
{self.session.cookies.
get_dict ()}"
) # 提取arg1
html_content = response.text
arg1_match = re.
search (r"arg1= if not arg1_match:
arg1_match = re.
search (r if not arg1_match:
print ("未找到arg1参数"
)return None
arg1 = arg1_match.
group (1
)print (f"提取到的arg1:
{arg1
}"
) # 计算acw_sc__v2值
acw_sc_v2_value = self.
compute_acw_sc_v2 (arg1
)print (f"计算出的acw_sc__v2值:
{acw_sc_v2_value
}"
)if not acw_sc_v2_value:
print ("acw_sc__v2计算失败"
)return None
# 添加acw_sc__v2到cookies
self.session.cookies.
set ( # 立即进行第二次请求
print ("第二次请求..."
)self.session.headers.
update ({ response2 = self.session.
get (url
)response2.
raise_for_status ()second_page_html = response2.text
print (f"第二次响应状态码:
{response2.status_code
}"
)print (f"第二次响应长度:
{len (second_page_html
)}"
) # 检查是否包含下载链接（iframe）
iframe_match = re.
search (r if not iframe_match:
print ("未找到iframe下载链接"
)return None
iframe_src = iframe_match.
group (1
)print (f"找到iframe链接:
{iframe_src
}"
) # 转换为完整URL
if iframe_src.
startswith ( base_url = f"
{urlparse (url
).scheme
}:
//{urlparse (url
).netloc
}"
fn_url =
urljoin (base_url, iframe_src
)else:
fn_url = iframe_src
# 提取文件信息
filename_match = re.
search (r if filename_match:
filename = filename_match.
group (1
)print (f"文件名:
{filename
}"
)else:
filename = "未知文件名"
filesize_match = re.
search (r if filesize_match:
filesize = filesize_match.
group (1
)print (f"文件大小:
{filesize
}"
)else:
filesize = "未知大小"
# 解析fn页面获取最终下载链接
download_url = self.
parse_fn_page (fn_url, second_page_html
)if download_url:
return
{ }else:
print ("未能获取到下载链接"
)return
{ }except requests.exceptions.RequestException as e:
print (f"请求错误:
{e
}"
)return None
except
楼主: 1393267359
粤公网安备 44522102000125 增值电信业务经营许可证 粤B2-20192173
发表于 2026-1-21 18:21:30
更新又不能用了？ 不应该啊，我这里显示 11-3日期 完全好好的，都没变动
楼主
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