How to execute an exe file from AWS lambda - amazon-web-services

Question

I have written a lambda function that executes another exe file named abc.exe.
Now I have created a zip of lambda function and uploaded it to aws. I am not sure where to put my "abc.exe"
I tried putting it in the same zip but I get below error:
exec: "abc": executable file not found in $PATH:
Here is my lambda function code:
func HandleLambdaEvent(request Request) (Response, error) {
fmt.Println("Input", request.Input)
fmt.Println("Output", request.Output)
cmd := exec.Command("abc", "-v", "--lambda", request.Input, "--out", request.Output)
var out bytes.Buffer
var stderr bytes.Buffer
cmd.Stdout = &out
cmd.Stderr = &stderr
err := cmd.Run()
if err != nil {
fmt.Println(fmt.Sprint(err) + ": " + stderr.String())
return Response{Message: fmt.Sprintf(stderr.String())}, nil
}
fmt.Println("Result: " + out.String())
return Response{Message: fmt.Sprintf(" %s and %s are input and output", request.Input, request.Output)}, nil
}
Update:
Trial 1:
I uploaded abc.exe to s3 then in my HandleLambdaEvent function I am downloading it to tmp/ folder. And next when i try to access it after successful download, it shows below error:
fork/exec /tmp/abc: no such file or directory:
Code to download abc.exe :
file, err2 := os.Create("tmp/abc.exe")
if err2 != nil {
fmt.Println("Unable to create file %q, %v", err2)
}
defer file.Close()
sess, _ := session.NewSession(&aws.Config{
Region: aws.String(region)},
)
downloader := s3manager.NewDownloader(sess)
numBytes, err2 := downloader.Download(file,
&s3.GetObjectInput{
Bucket: aws.String(bucket),
Key: aws.String("abc.exe"),
})
if err2 != nil {
fmt.Println("Unable to download item %q, %v", fileName, err2)
}
fmt.Println("Downloaded", file.Name(), numBytes, "bytes")
file.Close()

Answer 1

are you sure you even can execute an external binary? That seems counter-intuitive to me, like it violates the point of Lambda
Perfectly acceptable. Have a look at Running Arbitrary Executables in AWS Lambda on the AWS Compute Blog.
I am not sure where to put my "abc.exe"
To run executables on Lambda package them in the ZIP file you upload. Then do something like
exec.Command(path.Join(os.GetEnv("LAMBDA_TASK_ROOT"), "abc.exe"))
What sort of file is the .exe file? Is it a Windows app?
You won't be able to run Windows apps on Lambda. The linked blog post says: If you compile your own binaries, ensure that they’re either statically linked or built for the matching version of Amazon Linux