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Ability to presign #33

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Ability to presign #33

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27 changes: 24 additions & 3 deletions src/S3Policy.js
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Original file line number Diff line number Diff line change
Expand Up @@ -18,12 +18,22 @@ const DEFAULT_SUCCESS_ACTION_STATUS = "201";
export class S3Policy {
static generate(options) {
options || (options = {});

// always required
assert(options.accessKey, "Must provide `accessKey` option with your AWSAccessKeyId");
assert(options.key, "Must provide `key` option with the object key");
assert(options.bucket, "Must provide `bucket` option with your AWS bucket name");
assert(options.contentType, "Must provide `contentType` option with the object content type");
assert(options.region, "Must provide `region` option with your AWS region");
assert(options.accessKey, "Must provide `accessKey` option with your AWSAccessKeyId");

if (options.presign) {
assert(options.acl, "Must provide 'acl' with presign option");
assert(options.policy, "Must provide 'policy' with presign option");
assert(options.signature, "Must provide 'signature' with presign option");
return formatPolicyForPresign(options);
}

assert(options.secretKey, "Must provide `secretKey` option with your AWSSecretKey");
assert(options.bucket, "Must provide `bucket` option with your AWS bucket name");
assert(options.region, "Must provide `region` option with your AWS region");

let policyParams = getPolicyParams(options);
let policy = formatPolicyForEncoding(policyParams);
Expand Down Expand Up @@ -105,6 +115,17 @@ const formatPolicyForEncoding = (policy) => {
}
}

const formatPolicyForPresign = (options) => {
return {
"key": options.key,
"AWSAccessKeyId": options.accessKey,
"acl": options.acl,
"policy": options.policy,
"signature": options.signature,
"Content-Type": options.contentType,
}
}

const getEncodedPolicy = (policy) => {
return new Buffer(
JSON.stringify(policy),
Expand Down