鉴权ALI-A模式的Key的算法示例

{"value":"### \u4e00\u3001\u7b97\u6cd5\u793a\u4f8b\n\n 1.\u56de\u6e90\u8bf7\u6c42\u5bf9\u8c61\uff1a\n\n\u200b http:\/\/cdn.example.com\/video\/standard\/test.mp4\n\n\u200b \u8bf4\u660e \u5982\u679c\u60a8\u7684\u56de\u6e90\u8bf7\u6c42\u5bf9\u8c61\u4e2d\u6709\u4e2d\u6587\u6c49\u5b57\uff0c\u8bf7\u5148\u5bf9\u5176\u8fdb\u884cURL\u8f6c\u7801\uff08\u5373Encode\uff09\uff0c\u518d\u8fdb\u884c\u9274\u6743URL\u7684\u62fc\u63a5\u3002\n\n 2.\u8bbe\u7f6e\u5bc6\u94a5\u4e3a\uff1acdncloud1234\u3002\n\n 3.\u7b7e\u7b97\u670d\u52a1\u5668\u751f\u6210\u9274\u6743URL\u7684\u65f6\u95f4\uff1a2022-08-22 10:00:00\uff08UTC+8\uff09\uff0c\u8f6c\u6362\u4e3a\u5341\u8fdb\u5236\u7684\u6574\u5f62\u6570\u503c\u4e3a1661133600\u3002\n\n 4.\u62fc\u63a5\u6d41\u7a0b\n\n\u200b a.CDN\u670d\u52a1\u5668\u6784\u9020\u51fa\u4e00\u4e2a\u7528\u4e8e\u8ba1\u7b97md5hash\u7684\u7b7e\u540d\u5b57\u7b26\u4e32\u3002\n\n\u200b \/video\/standard\/test.mp4-1661133600-0-0-cdncloud1234\n\n\u200b b.\u6839\u636e\u8be5\u7b7e\u540d\u5b57\u7b26\u4e32\uff0cCDN\u670d\u52a1\u5668\u4f1a\u8ba1\u7b97\u51famd5hash\u3002\n\n\u200b md5hash = md5sum(\"\/video\/standard\/test.mp4-1661133600-0-0-cdncloud1234\") = 19f27227db0c4304701915f48129a592\n\n\u200b c.\u751f\u6210\u9274\u6743URL\u3002\n\n\u200b http:\/\/cdn.example.com\/video\/standard\/test.mp4?auth_key=1661133600-0-0-19f27227db0c4304701915f48129a592\n\n\n\n### \u4e8c\u3001\u5199\u6cd5\u793a\u4f8b\n\n { \"secret\": \"cdncloud1234\", \"ttl\": 1800 }\n\n \u5b57\u6bb5\u8bf4\u660e\uff1a \n\n| \u5b57\u6bb5 | \u8bf4\u660e |\n| ------ | -------------------- |\n| secret | \u7b7e\u540d\u5bc6\u94a5 |\n| ttl | \u8fc7\u671f\u65f6\u95f4\uff0c\u5355\u4f4d<\u79d2>\u3002 |\n\n "}