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main.go
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main.go
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package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"net/url"
"strings"
"github.com/google/google-api-go-client/googleapi"
"github.com/google/google-api-go-client/storage/v1"
"golang.org/x/oauth2"
"golang.org/x/oauth2/google"
)
var c *http.Client
var s *storage.Service
func init() {
var err error
c, err = google.DefaultClient(oauth2.NoContext, "https://www.googleapis.com/auth/cloud-platform")
if err != nil {
panic("No client")
}
s, err = storage.New(c)
if err != nil {
panic("No service")
}
}
const (
bucket = "gce-ilb-load"
outputjs = "data.json"
)
func main() {
fmt.Printf("Processing jobs from %v\n", bucket)
jobs, err := listJobs(bucket, "")
if err != nil {
log.Fatalf("error %s", err.Error)
}
lts := make([]*LoadTest, len(jobs))
resc, errc := make(chan *LoadTest), make(chan error)
for _, j := range jobs {
go func(job string) {
lt, err := getLoadTestForJob(job)
if err != nil {
errc <- err
}
resc <- lt
}(j)
}
for i := 0; i < len(jobs); i++ {
select {
case res := <-resc:
lts[i] = res
case err := <-errc:
log.Fatalf("Error: %s", err.Error())
}
}
outbytes, err := json.Marshal(lts)
if err != nil {
log.Fatalf("error marshaling json: %s", err.Error)
}
outs := "var testdata=" + string(outbytes)
err = ioutil.WriteFile(outputjs, []byte(outs), 0644)
if err != nil {
log.Fatalf("error writing file: %s", err.Error)
}
}
func listJobs(bucket string, prefix string) ([]string, error) {
objects, err := listObjects(bucket, "/", "")
if err != nil {
return nil, err
}
return objects.Prefixes, nil
}
func getLoadTestForJob(jobPrefix string) (*LoadTest, error) {
loadtest := &LoadTest{}
os, err := listObjects(bucket, "", jobPrefix)
if err != nil {
return loadtest, err
}
for _, o := range os.Items {
if strings.HasSuffix(o.Name, "job.json") {
oc, err := getObjectContents(o)
if err != nil {
return loadtest, err
}
err = json.Unmarshal(oc, loadtest)
if err != nil {
return loadtest, err
}
break
}
}
// Append all test results
allResults, err := getTestResultsForJob(jobPrefix)
if err != nil {
return loadtest, err
}
loadtest.AddResults(allResults)
return loadtest, nil
}
func getTestResultsForJob(jobPrefix string) ([]TestResult, error) {
os, err := listObjects(bucket, "", jobPrefix)
if err != nil {
return nil, err
}
results := make([]TestResult, len(os.Items)-1)
resc, errc := make(chan TestResult), make(chan error)
for _, o := range os.Items {
go func(obj *storage.Object) {
if !strings.HasSuffix(obj.Name, "job.json") {
tr, err := getTestResult(obj)
if err != nil {
errc <- err
}
resc <- tr
}
}(o)
}
for i := 0; i < len(os.Items)-1; i++ {
select {
case res := <-resc:
results[i] = res
case err := <-errc:
return results, err
}
}
return results, nil
}
func getTestResult(o *storage.Object) (TestResult, error) {
tr := TestResult{}
oc, err := getObjectContents(o)
if err != nil {
return tr, err
}
err = json.Unmarshal(oc, &tr)
if err != nil {
return tr, err
}
return tr, nil
}
func getObjectContents(o *storage.Object) ([]byte, error) {
urls := "https://www.googleapis.com/download/storage/v1/b/{BUCKET}/o/{OBJECT}?alt=media"
req, _ := http.NewRequest("GET", urls, nil)
req.URL.Path = strings.Replace(req.URL.Path, "{BUCKET}", url.QueryEscape(o.Bucket), 1)
req.URL.Path = strings.Replace(req.URL.Path, "{OBJECT}", url.QueryEscape(o.Name), 1)
googleapi.SetOpaque(req.URL)
r, err := c.Do(req)
if err != nil {
return nil, err
}
defer r.Body.Close()
contents, err := ioutil.ReadAll(r.Body)
if err != nil {
return nil, err
}
return contents, nil
}
func listObjects(bucket string, delimeter string, prefix string) (*storage.Objects, error) {
os := storage.NewObjectsService(s)
objects, err := os.List(bucket).MaxResults(10000).Prefix(prefix).Delimiter(delimeter).Do()
if err != nil {
return objects, err
}
for objects.NextPageToken != "" {
page, err := os.List(bucket).MaxResults(10000).Prefix(prefix).Delimiter(delimeter).PageToken(objects.NextPageToken).Do()
if err != nil {
return page, err
}
objects.Items = append(objects.Items, page.Items...)
objects.NextPageToken = page.NextPageToken
}
return objects, nil
}