MVP

main.go

@@ -1,27 +1,103 @@
 package main
 
 import (
+	"bytes"
+	"encoding/json"
 	"fmt"
+	"io"
+	"log"
 	"net/http"
 	"os"
 )
 
-func main() {
-//	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
-//		fmt.Fprintf(w, "Hello! you've requested %s\n", r.URL.Path)
-//	})
+type PDAlert struct {
+	RoutingKey  string    `json:"routing_key"`
+	EventAction string    `json:"event_action"`
+	Payload     PDPayload `json:"payload"`
+}
 
-	http.Handle("/", http.FileServer(http.Dir("./static")))
+type PDPayload struct {
+	Summary  string `json:"summary"`
+	Source   string `json:"source"`
+	Severity string `json:"severity"`
+}
+
+type PHandler struct {
+	next http.Handler
+}
+
+func NewPHandler(next http.Handler) *PHandler {
+	return &PHandler{
+		next: next,
+	}
+}
+
+func (ph *PHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	err := r.ParseForm()
+	if err != nil {
+		http.Error(w, fmt.Sprintf("invalid form: %s\n", err), http.StatusBadRequest)
+		return
+	}
+
+	msg := r.Form.Get("msg")
+	if msg == "" {
+		ph.next.ServeHTTP(w, r)
+		return
+	}
+
+	buf := &bytes.Buffer{}
+	err = json.NewEncoder(buf).Encode(PDAlert{
+		RoutingKey:  "63e451a6e5f84309d08d439bfe5efab5",
+		EventAction: "trigger",
+		Payload: PDPayload{
+			Summary:  msg,
+			Source:   "urlparam",
+			Severity: "critical",
+		},
+	})
+
+	if err != nil {
+		http.Error(w, fmt.Sprintf("failed to create PD request: %s\n", err), http.StatusBadRequest)
+		return
+	}
+
+	req, err := http.NewRequest("POST", "https://events.pagerduty.com/v2/enqueue", buf)
+	if err != nil {
+		http.Error(w, fmt.Sprintf("failed to create HTTP request: %s\n", err), http.StatusBadRequest)
+		return
+	}
+
+	c := &http.Client{}
+	res, err := c.Do(req)
+
+	if err != nil {
+		http.Error(w, fmt.Sprintf("error from PD: %s\n", err), http.StatusBadRequest)
+    	return
+	}
+
+	body, _ := io.ReadAll(res.Body)
+	res.Body.Close()
+
+	if res.StatusCode != 202 {
+		http.Error(w, fmt.Sprintf("error from PD: %s", string(body)), http.StatusBadRequest)
+    	return
+	}
+	
+	w.Write([]byte("page sent\n"))
+}
+
+func main() {
+	http.Handle("/", NewPHandler(http.FileServer(http.Dir("./static"))))
 
 	port := os.Getenv("PORT")
 	if port == "" {
 		port = "80"
 	}
 
-	bindAddr := fmt.Sprintf(":%s", port)
-	fmt.Printf("==> Server listening at %s 🚀\n", bindAddr)
+	bind := fmt.Sprintf(":%s", port)
+	log.Printf("listening on %s", bind)
 
-	if err := http.ListenAndServe(bindAddr, nil); err != nil {
+	if err := http.ListenAndServe(bind, nil); err != nil {
 		panic(err)
 	}
 }