/
listperf.go
127 lines (101 loc) · 2.75 KB
/
listperf.go
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package main
import (
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/service/s3"
"runtime"
"sync"
"flag"
)
var (
prefixFlag = flag.String("p", "", "prefix for search")
bucketFlag = flag.String("b", "", "bucket for search")
regionFlag = flag.String("r", "", "region for search")
endpointFlag = flag.String("e", "", "endpoint for bucket")
accessFlag = flag.String("a", "", "access key")
secretFlag = flag.String("s", "", "secret key")
cpu = flag.Int("cpus", runtime.NumCPU(), "Number of CPUs to use. Defaults to number of processors.")
sequentialFlag = flag.Bool("seq", false, "Run queries sequentially when true")
)
func listS3(wg *sync.WaitGroup, index int, results chan<- []string) {
var creds *credentials.Credentials
if *accessFlag != "" && *secretFlag != "" {
creds = credentials.NewStaticCredentials(*accessFlag, *secretFlag, "")
} else {
creds = credentials.AnonymousCredentials
}
sess := session.New(aws.NewConfig().WithCredentials(creds).WithRegion(*regionFlag).WithEndpoint(*endpointFlag).WithS3ForcePathStyle(true))
prefix := fmt.Sprintf("%s%x", *prefixFlag, index)
svc := s3.New(sess)
inputparams := &s3.ListObjectsInput{
Bucket: aws.String(*bucketFlag),
Prefix: aws.String(prefix),
}
result := make([]string, 0, 1000)
svc.ListObjectsPages(inputparams, func(page *s3.ListObjectsOutput, lastPage bool) bool {
for _, value := range page.Contents {
result = append(result, *value.Key)
}
if lastPage {
results <- result
wg.Done()
return false
} else {
return true
}
})
}
func listPrefixes() (map[string]bool, error) {
var wg sync.WaitGroup
var results = make(chan []string)
for i := 0x0; i <= 0xf; i++ {
wg.Add(1)
go func(index int) {
listS3(&wg, index, results)
}(i)
}
go func() {
wg.Wait()
close(results)
}()
prefixHash := make(map[string]bool)
for result := range results {
for _, r := range result {
prefixHash[r] = true
}
}
return prefixHash, nil
}
func listPrefixesSequentially() (map[string]bool, error) {
var wg sync.WaitGroup
var results = make(chan []string)
prefixHash := make(map[string]bool)
for i := 0x0; i <= 0xf; i++ {
wg.Add(1)
go func(index int) {
listS3(&wg, index, results)
}(i)
result := <-results
for _, r := range result {
prefixHash[r] = true
}
}
return prefixHash, nil
}
func main() {
flag.Parse()
runtime.GOMAXPROCS(*cpu)
if *prefixFlag == "" || *bucketFlag == "" || *regionFlag == "" || *endpointFlag == "" {
fmt.Println("Bad arguments")
return
}
var list map[string]bool
if *sequentialFlag {
list, _ = listPrefixesSequentially()
} else {
list, _ = listPrefixes()
}
fmt.Println("Number of replies:", len(list))
}