+ -H "X-LC-Sign: d5bcbb897e19b2f6633c716dfdfaf9be,1453014943466" \ 1. 使用Master Key 来计算 sign: + md5( timestamp + Master Key )= md5( 1453014943466DyJegPlemooo4X1tg94gQkw1 ) = e074720658078c898aa0d4b1b82bdf4b + -H "X-LC-Sign: e074720658078c898aa0d4b1b82bdf4b,1453014943...