$policyFields $policyFields 上传策略，参数规格详见 http://developer.qiniu.com/docs/v6/api/reference/security/put-policy.html
__construct() __construct(mixed $accessKey, mixed $secretKey) : mixed Parameters mixed $accessKey mixed $secretKey Returns mixed —
signRequest() signRequest(mixed $urlString, mixed $body, mixed $contentType = null) : mixed Parameters mixed $urlString mixed $body mixed $contentType Returns mixed —
verifyCallback() verifyCallback(mixed $contentType, mixed $originAuthorization, mixed $url, mixed $body) : mixed Parameters mixed $contentType mixed $originAuthorization mixed $url mixed $body Returns mixed —
privateDownloadUrl() privateDownloadUrl(mixed $baseUrl, mixed $expires = 3600) : mixed Parameters mixed $baseUrl mixed $expires Returns mixed —
uploadToken() uploadToken(mixed $bucket, mixed $key = null, mixed $expires = 3600, mixed $policy = null, mixed $strictPolicy = true) : mixed Parameters mixed $bucket mixed $key mixed $expires mixed $policy mixed $strictPolicy Returns mixed —
authorization() authorization(mixed $url, mixed $body = null, mixed $contentType = null) : mixed Parameters mixed $url mixed $body mixed $contentType Returns mixed —
authorizationV2() authorizationV2(mixed $url, mixed $method, mixed $body = null, mixed $contentType = null) : mixed Parameters mixed $url mixed $method mixed $body mixed $contentType Returns mixed —
copyPolicy() copyPolicy(mixed $policy, mixed $originPolicy, mixed $strictPolicy) : mixed Parameters mixed $policy mixed $originPolicy mixed $strictPolicy Returns mixed —