mirror of
https://github.com/TeamPiped/instances-api.git
synced 2024-12-13 05:40:38 +05:30
362 lines
7.9 KiB
Go
362 lines
7.9 KiB
Go
package main
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"log"
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"net/http"
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"os"
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"regexp"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/gofiber/fiber/v2"
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"github.com/gofiber/fiber/v2/middleware/cors"
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"github.com/gofiber/fiber/v2/middleware/etag"
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"github.com/google/go-github/v54/github"
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"golang.org/x/oauth2"
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)
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var monitored_instances = []Instance{}
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var number_re = regexp.MustCompile(`(?m)(\d+)`)
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type Instance struct {
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Name string `json:"name"`
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ApiUrl string `json:"api_url"`
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Locations string `json:"locations"`
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Version string `json:"version"`
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UpToDate bool `json:"up_to_date"`
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Cdn bool `json:"cdn"`
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Registered int `json:"registered"`
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LastChecked int64 `json:"last_checked"`
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Cache bool `json:"cache"`
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S3Enabled bool `json:"s3_enabled"`
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ImageProxyUrl string `json:"image_proxy_url"`
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RegistrationDisabled bool `json:"registration_disabled"`
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}
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type FrontendConfig struct {
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S3Enabled bool `json:"s3Enabled"`
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ImageProxyUrl string `json:"imageProxyUrl"`
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RegistrationDisabled bool `json:"registrationDisabled"`
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}
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type PipedStreams struct {
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Url string `json:"url"`
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}
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type Streams struct {
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VideoStreams []PipedStreams `json:"videoStreams"`
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}
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var client = http.Client{
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Timeout: 10 * time.Second,
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}
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func testUrl(url string) (*http.Response, error) {
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req, err := http.NewRequest("GET", url, nil)
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if err != nil {
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return nil, err
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}
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req.Header.Set("User-Agent", "Piped-Instances-API/(https://github.com/TeamPiped/instances-api)")
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resp, err := client.Do(req)
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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 getStreams(ApiUrl string, VideoId string) (Streams, error) {
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resp, err := testUrl(ApiUrl + "/streams/" + VideoId)
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if err != nil {
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return Streams{}, 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 Streams{}, err
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}
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var streams Streams
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err = json.Unmarshal(bytes, &streams)
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if err != nil {
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return Streams{}, err
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}
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return streams, nil
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}
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func getInstanceDetails(split []string, latest string) (Instance, error) {
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ApiUrl := strings.TrimSpace(split[1])
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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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errorChannel <- err
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return
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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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if err != nil {
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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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resp, err := testUrl(ApiUrl + "/version")
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if err != nil {
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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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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_split := strings.Split(version, "-")
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hash = version_split[len(version_split)-1]
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}()
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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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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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var err error
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cacheWorking, err = testCaching(ApiUrl)
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if err != nil {
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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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streams, err := getStreams(ApiUrl, "jNQXAC9IVRw")
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if err != nil {
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errorChannel <- err
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return
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}
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if len(streams.VideoStreams) == 0 {
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errorChannel <- errors.New("no streams")
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}
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// head request to check first stream
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if _, err := testUrl(streams.VideoStreams[0].Url); err != nil {
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errorChannel <- err
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}
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}()
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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{
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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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ImageProxyUrl: config.ImageProxyUrl,
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RegistrationDisabled: config.RegistrationDisabled,
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}, nil
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}
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func monitorInstances() {
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ctx := context.Background()
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var tc *http.Client
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if os.Getenv("GITHUB_TOKEN") != "" {
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ts := oauth2.StaticTokenSource(
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&oauth2.Token{AccessToken: os.Getenv("GITHUB_TOKEN")},
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)
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tc = oauth2.NewClient(ctx, ts)
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}
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gh_client := github.NewClient(tc)
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// do forever
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for {
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// send a request to get markdown from GitHub
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req, err := http.NewRequest("GET", "https://raw.githubusercontent.com/wiki/TeamPiped/Piped-Frontend/Instances.md", nil)
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if err != nil {
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log.Print(err)
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continue
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}
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req.Header.Set("User-Agent", "Piped-Instances-API/(https://github.com/TeamPiped/instances-api)")
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resp, err := client.Do(req)
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if err != nil {
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log.Print(err)
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continue
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}
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// Find Latest Commit from GitHub
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var latest string
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{
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commits, _, err := gh_client.Repositories.ListCommits(ctx, "TeamPiped", "Piped-Backend", &github.CommitsListOptions{
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ListOptions: github.ListOptions{
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PerPage: 1,
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},
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})
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if err != nil {
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log.Print(err)
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time.Sleep(time.Second * 5)
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continue
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}
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latest = commits[0].GetSHA()
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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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if err != nil {
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log.Print(err)
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continue
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}
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lines := strings.Split(buf.String(), "\n")
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instancesMap := make(map[int]Instance)
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wg := sync.WaitGroup{}
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skipped := 0
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checking := 0
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for _, line := range lines {
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split := strings.Split(line, "|")
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if len(split) < 5 {
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continue
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}
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// skip first two table lines
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if skipped < 2 {
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skipped++
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continue
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}
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wg.Add(1)
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go func(i int, split []string) {
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defer wg.Done()
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instance, err := getInstanceDetails(split, latest)
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if err == nil {
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instancesMap[i] = instance
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} else {
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log.Print(err)
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}
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}(checking, split)
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checking++
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}
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wg.Wait()
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// Map to ordered array
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var instances []Instance
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for i := 0; i < checking; i++ {
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instance, ok := instancesMap[i]
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if ok {
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instances = append(instances, instance)
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}
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}
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// update the global instances variable
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monitored_instances = instances
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}
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_ = resp.Body.Close()
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time.Sleep(time.Minute)
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}
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}
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func main() {
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go monitorInstances()
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app := fiber.New()
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app.Use(cors.New())
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app.Use(etag.New())
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app.Get("/", func(c *fiber.Ctx) error {
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return c.JSON(monitored_instances)
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})
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err := app.Listen(":3000")
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if err != nil {
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panic(err)
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}
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}
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