downloader.go

Copyright 2021, 2022 Red Hat, Inc

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

 
package
 
s3util

Documentation in literate-programming-style is available at: https://redhatinsights.github.io/insights-operator-utils/packages/s3/downloader.html

 


import
 
(

	
"fmt"

	
"io"


	
"github.com/aws/aws-sdk-go/aws"

	
"github.com/aws/aws-sdk-go/service/s3"

	
"github.com/aws/aws-sdk-go/service/s3/s3iface"


)

CannotReadError is used in the tests.

 
const
 
CannotReadError
 
=
 
"cannot read remote object"

DownloadObject downloads a file from an S3 bucket given the bucket and key. The response is in slice of byte format.

 
func
 
DownloadObject
(
client
 
s3iface
.
S3API
,
 
bucket
,
 
src
 
string
)
 
(
[
]
byte
,
 
error
)
 
{

	
result
,
 
err
 
:=
 
client
.
GetObject
(
&
s3
.
GetObjectInput
{

		
Bucket
:
 
aws
.
String
(
bucket
)
,
 
// Bucket to be used

		
Key
:
    
aws
.
String
(
src
)
,
    
// Name of the file to be downloaded

	
}
)


	
if
 
err
 
!=
 
nil
 
{

		
return
 
nil
,
 
err

	
}

	
b
,
 
err
 
:=
 
io
.
ReadAll
(
result
.
Body
)

	
if
 
err
 
!=
 
nil
 
{

		
return
 
nil
,
 
fmt
.
Errorf
(
"%s: %s"
,
 
CannotReadError
,
 
err
.
Error
(
)
)

	
}


	
return
 
b
,
 
err


}