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��️��新鲜度 理论上来讲，当一个资源被缓存存储后，该资源应该可以被永久存储在缓存中。由于缓存只有有限的空间用于存储资源副本，所以缓存会定期地将一些副本删除，这个过程叫做缓存驱逐。另一方面，当服务器上面的资源进行了更新，那么缓存中的对应资源也应该被更新，由于HTTP是C/S模式的协议，服务器更新一个资源时，不可能直接通知客户端更新缓存，所以双方必须为该资源约定一个过期时间，在该过期时间之前，该资源（缓存...
①代码讲解： import requests from retrying import retry headers = {"User-Agent":"Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/532.2 (KHTML, like Gecko) Chrome/4.0.222.3 "} @retry(stop_max_attempt_number=3) # stop_max_attempt_number=3最大执行3次，还不成功就报错 def _parse_url(url): # 前面加_代表此函数，其他地方不可调用 print("*"*100) response = requests.get(url, headers=headers, timeout=3) # timeout=3超时参数，3s内 assert response.status_code == 200 # as...
生活 POWER-UP ARGO – 以創意為載體，探索新鮮靈感 ARGO從亞洲各地搜羅雞尾酒材料，包括與本地蜂場香港原蜜及馬來西亞可可農場Chocolate Concierge合作。ARGO位於新界米埔的專屬蜂巢生產荔枝及龍眼單花蜜，用於製作蜂蜜口味的雞尾酒；Chocolate Concierge則按道德採購原則從馬來西亞原住民的種植場購買單一產地可可，每個批次皆各具風味。 ARGO亦將根據時令食材和與酒業同好的合作計劃不定期更新雞尾酒單「Canvas」，突破雞尾酒的創意界限。 除雞尾酒單外...
A common concern as web apps implement technologies that are less user-readable (and user-alterable) than traditional HTML, CSS, and JavaScript is that the web platform becomes less open. There are certainly examples of that: Facebook obfuscates its webpage code to stymie client-side ad blocking; websites have so much JavaScript, much of it related to ads and tracking, that it is common to minify (compress) web code to hit load time targets; proposals like Google's Web Bundles have been criticized as anti-web; and WebAssembly bytecode, while it may be fast, isn't easy to decipher. Newman, how...
Be one of them. clay johnson is the ceo of the department of better technology and author of "the information diet." also a former presidential innovation fellow, the same group that the administration is now bringing in to help troubleshoot healthcare.gov. so nice to have you today, clay. >> thanks for having me. >> so just in the simplest terms that even nerds can understand, even though we are not geeks, what is wrong with this site? >> well, it's an interesting question. a lot has gone wrong with the site. the first thing that's wrong with it is clearly the people who made it aren't very g...