fedilogue/fedilogger/poll.go

package main

import (
	"encoding/json"
	"io/ioutil"
	"net/http"
	"time"

	"git.farhan.codes/farhan/fedilogue/shared"
)

type ImageData struct {
	Type string `"json:type"`
	Url  string `"json:url"`
}

type PublicKeyData struct {
	Id           string `"json:id"`
	Owner        string `"json:owner"`
	PublicKeyPem string `"json:publicKeyPem"`
}

type UserInfo struct {
	Id                string        `"json:id"`
	Type              string        `"json:type"`
	Following         string        `"json:following"`
	Followers         string        `"json:followers"`
	Inbox             string        `"json:inbox"`
	Outbox            string        `"json:outbox"`
	Featured          string        `"json:featured"`
	PreferredUsername string        `"json:preferredUsername"`
	PublicKey         PublicKeyData `"json:publicKeyPem"`
	Name              string        `"json:name"`
	Summary           string        `"json:summary"`
	Url               string        `"json:Url"`
	Icon              ImageData     `"json:icon"`
	Image             ImageData     `"json:image"`
}

type PostInfo struct {
	Id        string `"json:id"`
	Type      string `"json:type"`
	Published string `"json:published"`
	Url       string `"json:Url"`
	Content   string `"json:content"`
}

func PollMastodonPleroma(endpoint string, o *shared.RunningInstance) {
	newactivities := make([]shared.ReportActivity, 0)

	min_id := ""

	parsing_error := 0
	use_auth := false

	var last_refresh int64
	var client_id string
	var client_secret string
	var oauthData OAuth

	for {
		ri_mutex.Lock()
		m := runninginstances[endpoint]
		ri_mutex.Unlock()

		api_timeline := "https://" + endpoint + "/api/v1/timelines/public?limit=40&since_id=" + min_id
		req, err := http.NewRequest("GET", api_timeline, nil)
		req.Header.Set("User-Agent", "Tusky")
		if err != nil {
			logFatal("Unable to create new request for "+endpoint+": ", err)
			return
		}

		if use_auth == true {
			if time.Now().Unix() > last_refresh+oauthData.Expires_in {
				oauthData, err = oauth_refresh(endpoint, client_id, client_secret, oauthData.Refresh_token)
				if err != nil {
					logWarn("Unable to refresh oauth token for "+endpoint+": ", err)
					return
				}
				last_refresh = time.Now().Unix()
			}
			req.Header.Add("Authorization", oauthData.Access_token)
		}

		m.LastRun = time.Now().Format(time.RFC3339)
		resp, err := DoTries(o, req)
		if err != nil {
			m.Status = shared.CLIENT_ISSUE
			ri_mutex.Lock()
			runninginstances[endpoint] = m
			ri_mutex.Unlock()
			logWarn("Giving up on "+endpoint+": ", err.Error())
			return
		}

		if resp.StatusCode == shared.TOOMANYREQUESTS { // Short Delay, 30 seconds
			logWarn("Delaying "+endpoint+", gave status ", resp.StatusCode, ", 1 hour delay")
			_, _ = ioutil.ReadAll(resp.Body)
			resp.Body.Close() // Release as soon as done
			m.Status = resp.StatusCode
			ri_mutex.Lock()
			runninginstances[endpoint] = m
			ri_mutex.Unlock()
			time.Sleep(time.Second * 30)
			continue
		} else if resp.StatusCode == shared.INTERNAL_ERROR { // Longer delay, 1 hour
			logWarn("Suspending "+endpoint+", gave status ", resp.StatusCode, ", 1 hour delay")
			_, _ = ioutil.ReadAll(resp.Body)
			resp.Body.Close() // Release as soon as done
			m.Status = 765
			ri_mutex.Lock()
			runninginstances[endpoint] = m
			ri_mutex.Unlock()
			time.Sleep(time.Second * 3600)
			continue
		} else if resp.StatusCode != 200 { // Crash
			logErr("Terminating "+endpoint+", gave status ", resp.StatusCode)
			_, _ = ioutil.ReadAll(resp.Body)
			resp.Body.Close() // Release as soon as done
			m.Status = resp.StatusCode
			ri_mutex.Lock()
			runninginstances[endpoint] = m
			ri_mutex.Unlock()
			return
		}

		err = json.NewDecoder(resp.Body).Decode(&newactivities)
		resp.Body.Close() // Release as soon as done
		if err != nil {
			if parsing_error > 5 {
				m.Status = shared.BAD_RESPONSE
				ri_mutex.Lock()
				runninginstances[endpoint] = m
				ri_mutex.Unlock()
				logErr("Giving up on " + endpoint + " after 5 unmarshal errors.")
				return
			}
			parsing_error = parsing_error + 1
			time.Sleep(time.Second * 30)
		}

		m.Status = shared.RUNNING
		ri_mutex.Lock()
		runninginstances[endpoint] = m
		ri_mutex.Unlock()

		for _, newactivity := range newactivities {
			go check_activity(newactivity.Uri)
			matchset := re.FindStringSubmatch(newactivity.Uri)
			if matchset != nil {
				newinstance := matchset[1]

				// Check min_id
				if newactivity.Id > min_id {
					min_id = newactivity.Id
				}

				go CheckInstance(newinstance, endpoint)
			}
		}
		time.Sleep(time.Second * 10)
	}
}