parallize checks per instance using go routines
This commit is contained in:
Bnyro
parent
2e081e3641
commit
c369f2b7bc
209
main.go
209
main.go
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@ -44,108 +44,155 @@ type FrontendConfig struct {
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S3Enabled bool `json:"s3Enabled"`
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}
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func testUrl(url string) (*http.Response, error) {
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resp, err := http.Get(url)
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if err != nil {
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return resp, err
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}
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if resp.StatusCode != 200 {
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return resp, errors.New(fmt.Sprintf("Invalid response code at %s: %d", url, resp.StatusCode))
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}
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return resp, err
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}
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func testCaching(ApiUrl string) (bool, error) {
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resp, err := testUrl(ApiUrl + "/trending?region=US")
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if err != nil {
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return false, err
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}
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oldTiming := resp.Header.Get("Server-Timing")
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resp, err = testUrl(ApiUrl + "/trending?region=US")
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if err != nil {
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return false, err
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}
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newTiming := resp.Header.Get("Server-Timing")
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cacheWorking := oldTiming == newTiming
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return cacheWorking, nil
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}
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func getConfig(ApiUrl string) (FrontendConfig, error) {
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resp, err := testUrl(ApiUrl + "/config")
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if err != nil {
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return FrontendConfig{}, err
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}
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bytes, err := io.ReadAll(resp.Body)
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if err != nil {
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return FrontendConfig{}, err
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}
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var config FrontendConfig
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err = json.Unmarshal(bytes, &config)
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if err != nil {
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return FrontendConfig{}, err
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}
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return config, nil
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}
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func getInstanceDetails(line string, latest string) (Instance, error) {
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split := strings.Split(line, "|")
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if len(split) >= 5 {
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ApiUrl := strings.TrimSpace(split[1])
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if len(split) < 5 {
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return Instance{}, errors.New(fmt.Sprintf("Invalid line: %s", line))
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}
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ApiUrl := strings.TrimSpace(split[1])
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resp, err := http.Get(ApiUrl + "/healthcheck")
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wg := sync.WaitGroup{}
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errorChannel := make(chan error)
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// the amount of tests to do
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wg.Add(6)
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var lastChecked int64
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var registered int64
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var config FrontendConfig
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var hash string
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var version string
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var cacheWorking bool
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go func() {
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wg.Wait()
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close(errorChannel)
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}()
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go func() {
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defer wg.Done()
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if _, err := testUrl(ApiUrl + "/healthcheck"); err != nil {
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errorChannel <- err
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return
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}
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lastChecked = time.Now().Unix()
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}()
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go func() {
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defer wg.Done()
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resp, err := testUrl(ApiUrl + "/registered/badge")
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if err != nil {
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return Instance{}, err
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errorChannel <- err
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return
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}
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LastChecked := time.Now().Unix()
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if resp.StatusCode != 200 {
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return Instance{}, errors.New("Invalid response code")
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}
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resp, err = http.Get(ApiUrl + "/registered/badge")
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registered, err = strconv.ParseInt(number_re.FindString(resp.Request.URL.Path), 10, 32)
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if err != nil {
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return Instance{}, err
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errorChannel <- err
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}
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registered, err := strconv.ParseInt(number_re.FindString(resp.Request.URL.Path), 10, 32)
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}()
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go func() {
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defer wg.Done()
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resp, err := testUrl(ApiUrl + "/version")
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if err != nil {
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return Instance{}, err
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}
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resp, err = http.Get(ApiUrl + "/version")
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if err != nil {
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return Instance{}, err
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}
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if resp.StatusCode != 200 {
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return Instance{}, errors.New("Invalid response code")
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errorChannel <- err
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return
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}
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buf := new(strings.Builder)
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_, err = io.Copy(buf, resp.Body)
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if err != nil {
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return Instance{}, err
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errorChannel <- err
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return
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}
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version := strings.TrimSpace(buf.String())
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version = strings.TrimSpace(buf.String())
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version_split := strings.Split(version, "-")
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hash := version_split[len(version_split)-1]
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hash = version_split[len(version_split)-1]
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}()
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resp, err = http.Get(ApiUrl + "/config")
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go func() {
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defer wg.Done()
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var err error
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config, err = getConfig(ApiUrl)
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if err != nil {
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return Instance{}, err
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}
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if resp.StatusCode != 200 {
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return Instance{}, errors.New("Invalid response code")
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errorChannel <- err
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}
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}()
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bytes, err := io.ReadAll(resp.Body)
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go func() {
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defer wg.Done()
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var err error
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cacheWorking, err = testCaching(ApiUrl)
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if err != nil {
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return Instance{}, err
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}
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var config FrontendConfig
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err = json.Unmarshal(bytes, &config)
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if err != nil {
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return Instance{}, err
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}
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cache_working := false
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resp, err = http.Get(ApiUrl + "/trending?region=US")
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if err != nil {
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return Instance{}, err
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}
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if resp.StatusCode == 200 {
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old_timing := resp.Header.Get("Server-Timing")
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resp, err = http.Get(ApiUrl + "/trending?region=US")
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if err != nil {
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return Instance{}, err
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}
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if resp.StatusCode == 200 {
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new_timing := resp.Header.Get("Server-Timing")
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if old_timing == new_timing {
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cache_working = true
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}
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}
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errorChannel <- err
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}
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}()
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go func() {
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defer wg.Done()
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// check if instance can fetch videos
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resp, err = http.Get(ApiUrl + "/streams/jNQXAC9IVRw")
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if err != nil {
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return Instance{}, err
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}
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if resp.StatusCode != 200 {
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return Instance{}, errors.New("Invalid status code")
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if _, err := testUrl(ApiUrl + "/streams/jNQXAC9IVRw"); err != nil {
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errorChannel <- err
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}
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}()
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return Instance{
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Name: strings.TrimSpace(split[0]),
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ApiUrl: ApiUrl,
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Locations: strings.TrimSpace(split[2]),
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Cdn: strings.TrimSpace(split[3]) == "Yes",
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Registered: int(registered),
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LastChecked: LastChecked,
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Version: version,
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UpToDate: strings.Contains(latest, hash),
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Cache: cache_working,
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S3Enabled: config.S3Enabled,
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}, nil
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for err := range errorChannel {
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return Instance{}, err
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}
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return Instance{}, errors.New("Invalid line")
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return Instance{
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Name: strings.TrimSpace(split[0]),
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ApiUrl: ApiUrl,
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Locations: strings.TrimSpace(split[2]),
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Cdn: strings.TrimSpace(split[3]) == "Yes",
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Registered: int(registered),
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LastChecked: lastChecked,
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Version: version,
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UpToDate: strings.Contains(latest, hash),
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Cache: cacheWorking,
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S3Enabled: config.S3Enabled,
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}, nil
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}
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func monitorInstances() {
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@ -184,7 +231,6 @@ func monitorInstances() {
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}
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if resp.StatusCode == 200 {
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// parse the response
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buf := new(strings.Builder)
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_, err := io.Copy(buf, resp.Body)
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@ -200,20 +246,20 @@ func monitorInstances() {
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wg := sync.WaitGroup{}
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for index, line := range lines {
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if index < 3 {
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fmt.Println(line)
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// skip first two and last line
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if index < 2 || index == len(lines)-1 {
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continue
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}
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wg.Add(1)
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go func(line string) {
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defer wg.Done()
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instance, err := getInstanceDetails(line, latest)
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if err == nil {
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instances = append(instances, instance)
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} else {
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log.Print(err)
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}
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wg.Done()
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}(line)
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}
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wg.Wait()
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@ -237,5 +283,6 @@ func main() {
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return c.JSON(monitored_instances)
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})
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fmt.Println("Listening on http://localhost:3000")
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app.Listen(":3000")
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}
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