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tinyfaas.go
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tinyfaas.go
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package tinyfaas
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"github.com/go-resty/resty/v2"
log "github.com/sirupsen/logrus"
"os/exec"
"time"
)
type TinyFaaS struct {
Host string
Port string
Path string
}
func New(host, port, path string) *TinyFaaS {
return &TinyFaaS{
Host: host,
Port: port,
Path: path,
}
}
func (tf *TinyFaaS) UploadLocal(funcName string, path string, env string, threads int, isFullPath bool, args []string) (string, error) {
//wiki: curl http://localhost:8080/upload --data "{\"name\": \"$2\", \"env\": \"$3\", \"threads\": $4, \"zip\": \"$(zip -r - ./* | base64 | tr -d '\n')\"}"
//wiki: ./scripts/upload.sh "test/fns/sieve-of-eratosthenes" "sieve" "nodejs" 1
start := time.Now()
// parse the function source code to base64
cmdStr := "zip -r - ./* | base64 | tr -d '\n'"
cmd := exec.Command("bash", "-c", cmdStr)
if isFullPath {
cmd.Dir = path
} else {
cmd.Dir = tf.Path + path
}
var zip bytes.Buffer
cmd.Stdout = &zip
err := cmd.Run()
if err != nil {
return "", err
}
// make a resty client
client := resty.New()
// make json parameters
params := map[string]interface{}{
"name": funcName,
"env": env,
"threads": threads,
"zip": zip.String(),
"envs": args,
}
jsonBody, err := json.Marshal(params)
if err != nil {
fmt.Println("Error marshaling JSON:", err)
return "", err
}
// call and get the response
callResponse := func() (*resty.Response, error) {
resp, err := client.R().
EnableTrace().
SetBody(jsonBody).
Post(fmt.Sprintf("http://%s:%s/%s", tf.Host, tf.Port, "upload"))
if err != nil {
return nil, err
}
return resp, nil
}
// validate the response
resp, err := checkResponse(callResponse)
if err != nil {
return "", fmt.Errorf("error uploading '%s' function via local func: %v. path: %v", funcName, err, cmd.Dir)
}
elapsed := time.Since(start)
log.Infof("(%s) '%s' deployed successfully (%v)", env, funcName, elapsed)
return resp, nil
}
func (tf *TinyFaaS) UploadURL(funcName string, subPath string, env string, threads int, url string, args []string) (string, error) {
//wiki: curl http://localhost:8080/uploadURL --data "{\"name\": \"$3\", \"env\": \"$4\",\"threads\": $5,\"url\": \"$1\",\"subfolder_path\": \"$2\"}"
//wiki: uploadURL.sh "https://github.com/OpenFogStack/tinyFaas/archive/main.zip" "tinyFaaS-main/test/fns/sieve-of-eratosthenes" "sieve" "nodejs" 1
start := time.Now()
// make a resty client
client := resty.New()
// make json parameters
params := map[string]interface{}{
"name": funcName,
"env": env,
"threads": threads,
"url": url,
"subfolder_path": subPath,
"envs": args,
}
jsonBody, err := json.Marshal(params)
if err != nil {
return "", fmt.Errorf("error marshaling JSON: %v", err)
}
// call and get the response
callResponse := func() (*resty.Response, error) {
resp, err := client.R().
EnableTrace().
SetBody(jsonBody).
Post(fmt.Sprintf("http://%s:%s/%s", tf.Host, tf.Port, "uploadURL"))
if err != nil {
return nil, err
}
return resp, nil
}
// validate the response
resp, err := checkResponse(callResponse)
if err != nil {
return resp, fmt.Errorf("Error uploading '%s' function via URL: %v", funcName, err)
}
elapsed := time.Since(start)
log.Infof("(%s) '%s' deployed successfully (%v)", env, funcName, elapsed)
return resp, nil
}
func (tf *TinyFaaS) Delete(funcName string) error {
//wiki: curl http://localhost:8080/delete --data "{\"name\": \"$1\"}"
start := time.Now()
// make a resty client
client := resty.New()
// make json parameters
params := map[string]interface{}{
"name": funcName,
}
jsonBody, err := json.Marshal(params)
if err != nil {
return fmt.Errorf("Error marshaling JSON: %v", err)
}
// call and get the response
callResponse := func() (*resty.Response, error) {
resp, err := client.R().
EnableTrace().
SetBody(jsonBody).
Post(fmt.Sprintf("http://%s:%s/%s", tf.Host, tf.Port, "delete"))
if err != nil {
return nil, err
}
return resp, nil
}
// validate the response
_, err = checkResponse(callResponse)
if err != nil {
return fmt.Errorf("Error when deleting '%s' function: %v", funcName, err)
}
elapsed := time.Since(start)
log.Infof("deleted '%s' function (%v) \n", funcName, elapsed)
return nil
}
func (tf *TinyFaaS) ResultsLog() (string, error) {
// make a resty client
client := resty.New()
// call and get the response
callResponse := func() (*resty.Response, error) {
resp, err := client.R().
EnableTrace().
Get(fmt.Sprintf("http://%s:%s/%s", tf.Host, tf.Port, "logs"))
if err != nil {
return nil, err
}
return resp, nil
}
// validate the response
resp, err := checkResponse(callResponse)
if err != nil {
return resp, fmt.Errorf("Error when getting results log: %v", err)
}
return resp, err
}
func (tf *TinyFaaS) WipeFunctions() error {
start := time.Now()
// make a resty client
client := resty.New()
// call and get the response
callResponse := func() (*resty.Response, error) {
resp, err := client.R().
EnableTrace().
Post(fmt.Sprintf("http://%s:%s/%s", tf.Host, tf.Port, "wipe"))
if err != nil {
return nil, err
}
return resp, nil
}
// validate the response
_, err := checkResponse(callResponse)
if err != nil {
return fmt.Errorf("error when wiping functions: %v", err)
}
elapsed := time.Since(start)
log.Infof("wiped functions (%v)", elapsed)
return nil
}
// Functions lists available functions
func (tf *TinyFaaS) Functions() (string, error) {
// make a resty client
client := resty.New()
// call and get the response
callResponse := func() (*resty.Response, error) {
resp, err := client.R().
EnableTrace().
Get(fmt.Sprintf("http://%s:%s/%s", tf.Host, tf.Port, "list"))
if err != nil {
return nil, err
}
return resp, nil
}
// validate the response
resp, err := checkResponse(callResponse)
if err != nil {
return resp, fmt.Errorf("error when getting functions list: %v", err)
}
return resp, nil
}
func (tf *TinyFaaS) Call(funcName string, data string) (string, error) { // Note: sample call function,
start := time.Now()
// make a resty client
client := resty.New()
// call and get the response
callResponse := func() (*resty.Response, error) {
resp, err := client.R().
EnableTrace().
SetBody(data).
Post(fmt.Sprintf("http://%s:%s/%s", tf.Host, 8000, funcName)) // http API
if err != nil {
return nil, err
}
return resp, nil
}
// validate the response
resp, err := checkResponse(callResponse)
if err != nil {
return "", err
}
elapsed := time.Since(start)
log.Infof("resp (%v): %s", elapsed, resp)
return resp, nil
}
// Private
func checkResponse(fn func() (*resty.Response, error)) (string, error) {
resp, err := fn()
if err != nil {
return "", err
}
if !resp.IsSuccess() {
msg := fmt.Sprintf("(%d) non-successful response. body: %v", resp.StatusCode(), resp.Body())
return "", errors.New(msg)
}
return string(resp.Body()), nil
}