etag
path
curl -H "If-None-Match: test123" https://tcpdata.com/etag/test123
fetch('https://tcpdata.com/etag/test123', {
headers: { 'If-None-Match': 'test123' }
})
.then(res => console.log(res.status));
import requests
headers = {'If-None-Match': 'test123'}
response = requests.get('https://tcpdata.com/etag/test123', headers=headers)
print(response.status_code)