如何在Framework4环境下下载使用了TLS1.3的网站中的图片
0
悬赏园豆：50
[已解决问题]
解决于 2021-04-20 20:42
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | (SecurityProtocolType)768 | (SecurityProtocolType)3072;
string imageUrl = "https://www.barkerbrettell.co.uk/content/email-assets/BBLogo.png";
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls12 | SecurityProtocolType.Tls | SecurityProtocolType.Tls11;
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(imageUrl);
HttpWebResponse rsp = (HttpWebResponse)req.GetResponse();
上述代码允许报错： Could not create SSL/TLS secure channel.
哪位大神有什么变通的方法吗？谢谢
最佳答案
0
(SecurityProtocolType)12288
試試這個？
try { //try TLS 1.3
ServicePointManager.SecurityProtocol = (SecurityProtocolType)12288
| (SecurityProtocolType)3072
| (SecurityProtocolType)768
| SecurityProtocolType.Tls;
} catch (NotSupportedException) {
try { //try TLS 1.2
ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072
| (SecurityProtocolType)768
| SecurityProtocolType.Tls;
} catch (NotSupportedException) {
try { //try TLS 1.1
ServicePointManager.SecurityProtocol = (SecurityProtocolType)768
| SecurityProtocolType.Tls;
} catch (NotSupportedException) { //TLS 1.0
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;
}
}
}
收获园豆：50
试过了，报错了，可能需要机器上安装更高版本的framework吧
只能支持到1.2
@会长:
https://stackoverflow.com/questions/62677922/is-there-a-way-for-windows-7-to-support-tls-1-3-net-4-8
說是實驗性功能，目前只支援Win 10？
@RosonJ: 我想试试能不能通过其它进程把文件下载下来，然后在framework4平台上的程序去磁碟上读取。
@会长:
文件一定要透過TLS 1.3？
@RosonJ: 就是这个文件：https://www.barkerbrettell.co.uk/content/email-assets/BBLogo.png 这个文件是客户提供的，自己没法改变
@会长:
我抓包看是走TLS 1.2阿
@RosonJ: 你执行我开头贴的那段代码会报错吗，我是f12看的，等下我截图
@RosonJ:
@RosonJ: 是不是抓包工具比较老。我用Fiddler看，也显示1.2
@会长:
透過F12看確實是TLS 1.3
抓包卻是TLS 1.2，真奇特
@会长:
你這麼說道是有可能，我試試更新看看
@会长:
確實，升級之後顯示TLS 1.3
你手邊有Win 10環境嗎？把功能放到Win 10上試試？
@RosonJ: 好，我试试，不过就算可以也没太大用处，也不能让用户重新安装操作系统
@RosonJ: 试了下同事的windows 10，确实是可以
@会长:
只能跟用戶說Win 7 EOL了...
@RosonJ: 我试了用python下载，毫无压力
import os
os.makedirs('./image/', exist_ok=True)
IMAGE_URL = "https://www.barkerbrettell.co.uk/content/email-assets/BBLogo.png"
def urllib_download():
from urllib.request import urlretrieve
urlretrieve(IMAGE_URL, './image/img1.png')
def request_download():
import requests
r = requests.get(IMAGE_URL)
with open('./image/img2.png', 'wb') as f:
f.write(r.content)
def chunk_download():
import requests
r = requests.get(IMAGE_URL, stream=True)
with open('./image/img3.png', 'wb') as f:
for chunk in r.iter_content(chunk_size=32):
f.write(chunk)
if __name__ == '__main__':
urllib_download()
print('download img1')
request_download()
print('download img2')
chunk_download()
print('download img3')
@RosonJ: 我最近搞996，没空来答题了，我的园豆要被你超越了....
@会长:
怎麼搞起996了？
我的園豆還差你一大截呢哈哈
@RosonJ: 活多人少，利润低
@会长:
真慘啊...
其他回答(1)
0
我写了一段python代码，然后把它用pyinstaller搞成exe文件，在C#代码里调用.....
import os
import sys
from urllib.request import urlretrieve
import logging
import time
if __name__ == '__main__':
today = time.strftime("%Y%m%d",time.localtime(time.time()))
logdir = 'logs'
if not os.path.exists(logdir):
os.mkdir(logdir)
logging.basicConfig(filename= logdir + '\\' + today + '.log', level=logging.DEBUG, format="%(asctime)s - %(levelname)s - %(message)s")
try:
url = sys.argv[1]
path = sys.argv[2]
urlretrieve(url, path)
except BaseException as e:
logging.error(e)
