83 lines
1.7 KiB
Go
83 lines
1.7 KiB
Go
package main
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import (
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"context"
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"encoding/json"
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"log"
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"net/http"
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"os"
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"time"
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"git.xeserv.us/xena/mercy/internal/common"
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"github.com/nats-io/go-nats"
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)
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func main() {
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uri := os.Getenv("NATS_URL")
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nc, err := common.NatsConnect(uri)
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if err != nil {
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log.Fatal("Error establishing connection to NATS:", err)
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}
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log.Printf("Connected to NATS at: %s", nc.ConnectedUrl())
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nc.QueueSubscribe("tasks:http", "worker", func(m *nats.Msg) {
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var hc common.HTTPCheckRequest
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err := json.Unmarshal(m.Data, &hc)
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if err != nil {
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log.Printf("tasks:http: error when decoding json: %v", err)
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return
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}
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req, err := http.NewRequest(http.MethodGet, hc.URL, nil)
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if err != nil {
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log.Printf("tasks:http: error when creating request: %v", err)
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return
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}
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ctx, cancel := context.WithTimeout(context.Background(), hc.FailThreshold)
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defer cancel()
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req = req.WithContext(ctx)
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result := common.CheckResult{Preamble: hc.Preamble}
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before := time.Now()
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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switch err {
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case context.Canceled:
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result.Result = common.Failed
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default:
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log.Printf("tasks:http: error when fetching url %s: %v", hc.URL, err)
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result.ErrData = err.Error()
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}
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}
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if resp.StatusCode/100 == 2 {
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result.Result = common.OK
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}
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if now := time.Now(); before.Add(hc.DegradedThreshold).Before(now) {
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result.Result = common.Degraded
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}
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result.Timestamp = time.Now()
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data, err := json.Marshal(&result)
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if err != nil {
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log.Printf("tasks:http: error encoding json for %#v: %v", result, err)
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return
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}
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err = nc.Publish("results", data)
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if err != nil {
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log.Printf("tasks:http: error publishing results: %v", err)
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}
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log.Printf()
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})
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for {
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select {}
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}
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}
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