Initial version in Go (switching from PHP to Go)

CHANGELOG.md

@@ -0,0 +1,21 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+---
+
+## Unreleased
+
+#### Links
+- upstream: https://code.lindeas.com/lindeas/jilo-agent/releases/tag/v0.1
+- codeberg: https://codeberg.org/lindeas/jilo-agent/releases/tag/v0.1
+- github: https://github.com/lindeas/jilo-agent/releases/tag/v0.1
+- gitlab: https://gitlab.com/lindeas/jilo-agent/-/releases/v0.1
+
+### Added
+- Initial version in PHP
+- Added endpoint for /nginx, /prosody, /jicofo, /nginx
+- Added a config file
+- New version in folder "go", written in Go
+- Added endpoint for /nginx
+- Initial vesion of a build script

README.md

@@ -1,3 +1,7 @@
 # jilo-agent
 
 Jilo Agent - a remote agent for Jilo Web
+
+Initial version is in PHP.
+
+The current version is in "go" folder and is in Go.

go/build.sh

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+#!/usr/bin/env bash
+
+go build -o jilo-agent main.go

go/main.go

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+/*
+Jilo Agent
+
+Description: Remote agent for Jilo Web with http API
+Author: Yasen Pramatarov
+License: GPLv2
+Project URL: https://lindeas.com/jilo
+Year: 2024
+Version: 0.1
+*/
+
+package main
+
+import (
+    "encoding/json"
+    "fmt"
+    "log"
+    "net/http"
+    "os/exec"
+    "strconv"
+    "strings"
+)
+
+// NginxData holds the nginx data structure for the API response to /nginx
+type NginxData struct {
+    NginxState		string	`json:"nginx_status"`
+    NginxConnections	int	`json:"nginx_connections"`
+}
+
+// getNginxState checks the status of the nginx service
+func getNginxState() string {
+    output, err := exec.Command("systemctl", "is-active", "nginx").Output()
+    if err != nil {
+        log.Printf("Error checking the nginx state: %v", err)
+        return "error"
+    }
+    state := strings.TrimSpace(string(output))
+    if state == "active" {
+        return "running"
+    }
+    return "not running"
+}
+
+// getNginxConnections gets the number of active connections to the specified web port
+func getNginxConnections() int {
+    output, err := exec.Command("bash", "-c", "netstat -an | grep ':80' | wc -l").Output()
+    if err != nil {
+        log.Printf("Error counting the Nginx connections: %v", err)
+        return -1
+    }
+    connections := strings.TrimSpace(string(output))
+    connectionsInt, err := strconv.Atoi(connections)
+    if err != nil {
+        log.Printf("Error converting connections to integer number: %v", err)
+        return -1
+    }
+    return connectionsInt
+}
+
+// nginxHandler handles the /nginx endpoint
+func nginxHandler(w http.ResponseWriter, r *http.Request) {
+    data := NginxData {
+        NginxState:		getNginxState(),
+        NginxConnections:	getNginxConnections(),
+    }
+    w.Header().Set("Content-Type", "application/json")
+    json.NewEncoder(w).Encode(data)
+}
+
+// main sets up the http server and the routes
+func main() {
+    http.HandleFunc("/nginx", nginxHandler)
+    fmt.Println("Starting agent server on port 8080.")
+    if err := http.ListenAndServe(":8080", nil); err != nil {
+        log.Fatalf("Could not start the server: %v\n", err)
+    }
+}