问题
I develope a Chrome extension. I want to detect a download before the actual download has started. There is a chrome.downloads API but all events are fired too late. There is also a webRequest API with a lot events. Sadly the data provided by those events didn't help me to detect a download (request). Is there any possibility to detect a download BEFORE chrome already downloads a file?
来源：https://stackoverflow.com/questions/34152836/is-it-possible-to-detect-a-download-before-the-actual-download-has-started-in-ch