Remove unimplemented codes & Lint Fixes

.github/workflows/lint.yml

@@ -0,0 +1,19 @@
+name: lint
+
+on:
+  pull_request:
+    branches:
+      - main
+      - develop
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Golangci-lint
+        uses: golangci/[email protected]

cmd/capture/main.go

@@ -23,7 +23,7 @@ var appConfig = config.NewConfig(
 func main() {
 	r := gin.Default()
 	apiV1 := r.Group("/api/v1")
-	apiV1.Use(middleware.AuthRequired(appConfig.ApiSecret))
+	apiV1.Use(middleware.AuthRequired(appConfig.APISecret))
 
 	// Health Check
 	apiV1.GET("/health", handler.Health)
@@ -35,12 +35,10 @@ func main() {
 	apiV1.GET("/metrics/disk", handler.MetricsDisk)
 	apiV1.GET("/metrics/host", handler.MetricsHost)
 
-	// WebSocket Connection
-	apiV1.GET("/ws/metrics", handler.WebSocket)
-
 	server := &http.Server{
-		Addr:    ":" + appConfig.Port,
-		Handler: r.Handler(),
+		Addr:              ":" + appConfig.Port,
+		Handler:           r.Handler(),
+		ReadHeaderTimeout: 5 * time.Second,
 	}
 
 	// Graceful shutdown
@@ -57,10 +55,9 @@ func main() {
 	if err := server.Shutdown(ctx); err != nil {
 		log.Fatal("server shutdown:", err)
 	}
-	select {
-	case <-ctx.Done():
-		log.Println("timeout of 5 seconds.")
-	}
+	<-ctx.Done()
+	log.Println("timeout of 5 seconds.")
+
 	log.Println("server exiting")
 }
 

go.mod

@@ -4,7 +4,6 @@ go 1.23.1
 
 require (
 	github.com/gin-gonic/gin v1.10.0
-	github.com/gorilla/websocket v1.5.3
 	github.com/shirou/gopsutil/v4 v4.24.9
 	github.com/stretchr/testify v1.9.0
 )

go.sum

@@ -34,8 +34,6 @@ github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
-github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
-github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=

internal/config/config.go

@@ -4,7 +4,7 @@ import "log"
 
 type Config struct {
 	Port      string
-	ApiSecret string
+	APISecret string
 }
 
 var defaultPort = "59232"
@@ -22,13 +22,13 @@ func NewConfig(port string, apiSecret string) *Config {
 
 	return &Config{
 		Port:      port,
-		ApiSecret: apiSecret,
+		APISecret: apiSecret,
 	}
 }
 
 func Default() *Config {
 	return &Config{
 		Port:      defaultPort,
-		ApiSecret: "",
+		APISecret: "",
 	}
 }

internal/handler/metrics.go

@@ -10,11 +10,10 @@ func handleMetricResponse(c *gin.Context, metrics metric.Metric, errs []metric.C
 	if len(errs) > 0 {
 		statusCode = 207
 	}
-	c.JSON(statusCode, metric.ApiResponse{
+	c.JSON(statusCode, metric.APIResponse{
 		Data:   metrics,
 		Errors: errs,
 	})
-	return
 }
 
 func Metrics(c *gin.Context) {
@@ -23,7 +22,7 @@ func Metrics(c *gin.Context) {
 }
 
 func MetricsCPU(c *gin.Context) {
-	cpuMetrics, metricsErrs := metric.CollectCpuMetrics()
+	cpuMetrics, metricsErrs := metric.CollectCPUMetrics()
 	handleMetricResponse(c, cpuMetrics, metricsErrs)
 }
 

internal/metric/cpu.go

@@ -7,7 +7,7 @@ import (
 	"github.com/shirou/gopsutil/v4/cpu"
 )
 
-func CollectCpuMetrics() (*CpuData, []CustomErr) {
+func CollectCPUMetrics() (*CPUData, []CustomErr) {
 	// Collect CPU Core Counts
 	cpuPhysicalCoreCount, cpuPhysicalErr := cpu.Counts(false)
 	cpuLogicalCoreCount, cpuLogicalErr := cpu.Counts(true)
@@ -60,7 +60,7 @@ func CollectCpuMetrics() (*CpuData, []CustomErr) {
 	}
 
 	// Collect CPU Temperature from sysfs
-	cpuTemp, cpuTempErr := sysfs.CpuTemperature()
+	cpuTemp, cpuTempErr := sysfs.CPUTemperature()
 
 	if cpuTempErr != nil {
 		cpuErrors = append(cpuErrors, CustomErr{
@@ -70,7 +70,7 @@ func CollectCpuMetrics() (*CpuData, []CustomErr) {
 		cpuTemp = nil
 	}
 
-	cpuCurrentFrequency, cpuCurFreqErr := sysfs.CpuCurrentFrequency()
+	cpuCurrentFrequency, cpuCurFreqErr := sysfs.CPUCurrentFrequency()
 	if cpuCurFreqErr != nil {
 		cpuErrors = append(cpuErrors, CustomErr{
 			Metric: []string{"cpu.current_frequency"},
@@ -79,7 +79,7 @@ func CollectCpuMetrics() (*CpuData, []CustomErr) {
 		cpuCurrentFrequency = 0
 	}
 
-	return &CpuData{
+	return &CPUData{
 		PhysicalCore:     cpuPhysicalCoreCount,
 		LogicalCore:      cpuLogicalCoreCount,
 		Frequency:        cpuFrequency,

internal/metric/disk.go

@@ -10,17 +10,15 @@ import (
 func CollectDiskMetrics() (MetricsSlice, []CustomErr) {
 	defaultDiskData := []*DiskData{
 		{
-			Device:          "unknown",
-			ReadSpeedBytes:  nil,
-			WriteSpeedBytes: nil,
-			TotalBytes:      nil,
-			FreeBytes:       nil,
-			UsagePercent:    nil,
+			Device:       "unknown",
+			TotalBytes:   nil,
+			FreeBytes:    nil,
+			UsagePercent: nil,
 		},
 	}
 	var diskErrors []CustomErr
 	var metricsSlice MetricsSlice
-	var checkedSlice []string // To keep track of checked partitions
+	var checkedSlice = make([]string, 0, 10) // To keep track of checked partitions
 
 	// Set all flag to "false" to get only necessary partitions
 	// Avoiding unnecessary partitions like /run/user/1000, /run/credentials
@@ -52,12 +50,10 @@ func CollectDiskMetrics() (MetricsSlice, []CustomErr) {
 
 		checkedSlice = append(checkedSlice, p.Device)
 		metricsSlice = append(metricsSlice, &DiskData{
-			Device:          p.Device,
-			ReadSpeedBytes:  nil, // TODO: Implement
-			WriteSpeedBytes: nil, // TODO: Implement
-			TotalBytes:      &diskUsage.Total,
-			FreeBytes:       &diskUsage.Free,
-			UsagePercent:    RoundFloatPtr(diskUsage.UsedPercent/100, 4),
+			Device:       p.Device,
+			TotalBytes:   &diskUsage.Total,
+			FreeBytes:    &diskUsage.Free,
+			UsagePercent: RoundFloatPtr(diskUsage.UsedPercent/100, 4),
 		})
 	}
 

internal/metric/metric.go

@@ -8,13 +8,13 @@ type Metric interface {
 	isMetric()
 }
 
-type ApiResponse struct {
+type APIResponse struct {
 	Data   Metric      `json:"data"`
 	Errors []CustomErr `json:"errors"`
 }
 
 type AllMetrics struct {
-	Cpu    CpuData      `json:"cpu"`
+	CPU    CPUData      `json:"cpu"`
 	Memory MemoryData   `json:"memory"`
 	Disk   MetricsSlice `json:"disk"`
 	Host   HostData     `json:"host"`
@@ -27,7 +27,7 @@ type CustomErr struct {
 	Error  string   `json:"err"`
 }
 
-type CpuData struct {
+type CPUData struct {
 	PhysicalCore     int       `json:"physical_core"`     // Physical cores
 	LogicalCore      int       `json:"logical_core"`      // Logical cores aka Threads
 	Frequency        float64   `json:"frequency"`         // Frequency in mHz
@@ -37,7 +37,7 @@ type CpuData struct {
 	UsagePercent     float64   `json:"usage_percent"`     // Usage percentage                              //* Total - Idle / Total
 }
 
-func (c CpuData) isMetric() {}
+func (c CPUData) isMetric() {}
 
 type MemoryData struct {
 	TotalBytes     uint64   `json:"total_bytes"`     // Total space in bytes
@@ -49,12 +49,10 @@ type MemoryData struct {
 func (m MemoryData) isMetric() {}
 
 type DiskData struct {
-	Device          string   `json:"device"`            // Device
-	ReadSpeedBytes  *uint64  `json:"read_speed_bytes"`  // TODO: Implement
-	WriteSpeedBytes *uint64  `json:"write_speed_bytes"` // TODO: Implement
-	TotalBytes      *uint64  `json:"total_bytes"`       // Total space of device in bytes
-	FreeBytes       *uint64  `json:"free_bytes"`        // Free space of device in bytes
-	UsagePercent    *float64 `json:"usage_percent"`     // Usage Percent of device
+	Device       string   `json:"device"`        // Device
+	TotalBytes   *uint64  `json:"total_bytes"`   // Total space of device in bytes
+	FreeBytes    *uint64  `json:"free_bytes"`    // Free space of device in bytes
+	UsagePercent *float64 `json:"usage_percent"` // Usage Percent of device
 }
 
 func (d DiskData) isMetric() {}
@@ -68,7 +66,7 @@ type HostData struct {
 func (h HostData) isMetric() {}
 
 func GetAllSystemMetrics() (AllMetrics, []CustomErr) {
-	cpu, cpuErr := CollectCpuMetrics()
+	cpu, cpuErr := CollectCPUMetrics()
 	memory, memErr := CollectMemoryMetrics()
 	disk, diskErr := CollectDiskMetrics()
 	host, hostErr := GetHostInformation()
@@ -92,7 +90,7 @@ func GetAllSystemMetrics() (AllMetrics, []CustomErr) {
 	}
 
 	return AllMetrics{
-		Cpu:    *cpu,
+		CPU:    *cpu,
 		Memory: *memory,
 		Disk:   disk,
 		Host:   *host,

internal/metric/metric_math.go

@@ -20,8 +20,8 @@ func RoundFloat(val float64, precision uint) float64 {
 	return prc
 }
 
-func RandomIntPtr(max int64) *int {
-	n, err := rand.Int(rand.Reader, big.NewInt(max))
+func RandomIntPtr(maximum int64) *int {
+	n, err := rand.Int(rand.Reader, big.NewInt(maximum))
 	if err != nil {
 		panic(err) // handle error appropriately in production
 	}

internal/sysfs/cpu.go

@@ -22,7 +22,7 @@ func readTempFile(path string) (float32, error) {
 	return float32(temp) / 1000, nil
 }
 
-func readCpuFreqFile(path string) (int, error) {
+func readCPUFreqFile(path string) (int, error) {
 	data, err := os.ReadFile(path)
 	if err != nil {
 		return 0, err
@@ -36,7 +36,7 @@ func readCpuFreqFile(path string) (int, error) {
 	return freq, nil
 }
 
-func CpuTemperature() ([]float32, error) {
+func CPUTemperature() ([]float32, error) {
 	// Look in all these folders for core temp
 	corePaths := []string{
 		"/sys/devices/platform/coretemp.0/hwmon/hwmon*/temp*_input",
@@ -74,8 +74,8 @@ func CpuTemperature() ([]float32, error) {
 	return temps, nil
 }
 
-func CpuCurrentFrequency() (int, error) {
-	frequency, cpuFrequencyError := readCpuFreqFile("/sys/devices/system/cpu/cpufreq/policy0/scaling_cur_freq")
+func CPUCurrentFrequency() (int, error) {
+	frequency, cpuFrequencyError := readCPUFreqFile("/sys/devices/system/cpu/cpufreq/policy0/scaling_cur_freq")
 
 	if cpuFrequencyError != nil {
 		return 0, cpuFrequencyError

internal/sysfs/exec.go

@@ -8,7 +8,7 @@ import (
 
 func ShellExec(c string) (string, error) {
 	if strings.Contains(c, "&&") || strings.Contains(c, "||") || strings.Contains(c, ";") {
-		return "", errors.New("It's forbidden to execute consecutive commands")
+		return "", errors.New("it's forbidden to execute consecutive commands")
 	}
 	cmd := exec.Command("bash", "-c", c)