forked from awsdocs/aws-doc-sdk-examples
/
SetCors.go
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/
SetCors.go
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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
// snippet-start:[s3.go.put_bucket_cors]
package main
// snippet-start:[s3.go.put_bucket_cors.imports]
import (
"flag"
"fmt"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
)
// snippet-end:[s3.go.put_bucket_cors.imports]
// SetCors configures CORS rules for a bucket by setting the allowed HTTP methods.
// Inputs:
//
// sess is the current session, which provides configuration for the SDK's service clients
// bucket is the name of bucket
// methods are the HTTP methods: "POST", "GET", "PUT", "PATCH", "DELETE"
//
// Output:
//
// If success, the SOMETHING of the RESOURCE and nil
// Otherwise, an empty string and an error from the call to FUNCTION
//
// Requires the bucket name, and can also take a space separated
// list of HTTP methods.
func SetCors(sess *session.Session, bucket *string, methods []string) error {
// snippet-start:[s3.go.put_bucket_cors.rule]
rule := s3.CORSRule{
AllowedHeaders: aws.StringSlice([]string{"Authorization"}),
AllowedOrigins: aws.StringSlice([]string{"*"}),
MaxAgeSeconds: aws.Int64(3000),
AllowedMethods: aws.StringSlice(methods),
}
// snippet-end:[s3.go.put_bucket_cors.rule]
// snippet-start:[s3.go.put_bucket_cors.call]
svc := s3.New(sess)
_, err := svc.PutBucketCors(&s3.PutBucketCorsInput{
Bucket: bucket,
CORSConfiguration: &s3.CORSConfiguration{
CORSRules: []*s3.CORSRule{&rule},
},
})
// snippet-end:[s3.go.put_bucket_cors.call]
if err != nil {
return err
}
return nil
}
// FilterMethods takes an array of strings and returns any that are HTTP methods
// snippet-start:[s3.go.put_bucket_cors.filter]
func FilterMethods(methods []string) []string {
filtered := make([]string, 0, len(methods))
for _, m := range methods {
v := strings.ToUpper(m)
switch v {
case "POST", "GET", "PUT", "PATCH", "DELETE":
filtered = append(filtered, v)
}
}
return filtered
}
// snippet-end:[s3.go.put_bucket_cors.filter]
func main() {
// snippet-start:[s3.go.put_bucket_cors.args]
bucket := flag.String("b", "", "Bucket to set CORS on, (required)")
flag.Parse()
if *bucket == "" {
fmt.Println("You must supply the name of a bucket (-b BUCKET)")
return
}
methods := FilterMethods(flag.Args())
if len(methods) == 0 {
fmt.Println("You must supply at least one HTTP method: POST, GET, PUT, PATCH, or DELETE")
}
// snippet-end:[s3.go.put_bucket_cors.args]
// snippet-start:[s3.go.put_bucket_cors.session]
sess := session.Must(session.NewSessionWithOptions(session.Options{
SharedConfigState: session.SharedConfigEnable,
}))
// snippet-end:[s3.go.put_bucket_cors.session]
err := SetCors(sess, bucket, methods)
if err != nil {
fmt.Println("Got an error setting CORS:")
fmt.Println(err)
return
}
}
// snippet-end:[s3.go.put_bucket_cors]