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sun.net.www.protocol.http.HttpURLConnection底层会对CookieHandler作响应:
1.如果设置CookieHandler会导致requests对httpOnly的cookie获取失败(sun.net.www.protocol.http.HttpURLConnection#filterHeaderField)
2.如果设置CookieHandler会导致系统和CookieHandler分别对cookie进行一次处理导致cookie重复
bug触发方式:
当系统调用CookieHandler之后使用CookieHandler来处理cookie可避免此bug