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treewide: refactor; defer cli handling to cobra

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This commit is contained in:
raf 2025-06-18 14:01:26 +03:00
commit 1dd971e16b
Signed by: NotAShelf
GPG key ID: 29D95B64378DB4BF
7 changed files with 185 additions and 151 deletions
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91
cmd/root.go Normal file
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package cmd
import (
"context"
"fmt"
"os"
"os/signal"
"sync"
"syscall"
"time"
"github.com/spf13/cobra"
"notashelf.dev/tct/internal/tct"
)
var (
url string
maxRequests int
delay time.Duration
Version string // will be set by main package
)
var rootCmd = &cobra.Command{
Use: "tct",
Short: "TCP Connection Timer - find optimal parallel request count",
Long: `A tool to measure and find the optimal number of parallel TCP requests for a given URL.`,
Run: run,
}
func Execute() {
if Version != "" {
rootCmd.Version = Version
}
if err := rootCmd.Execute(); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
func init() {
rootCmd.Flags().StringVarP(&url, "url", "u", "http://example.com", "URL to fetch")
rootCmd.Flags().IntVarP(&maxRequests, "max", "m", 100, "Maximum number of parallel requests")
rootCmd.Flags().DurationVarP(&delay, "delay", "d", 0, "Delay between requests")
}
func run(cmd *cobra.Command, args []string) {
client := tct.NewClient()
// Context that listens for the interrupt signal
ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
defer stop()
optimal := 0
minTime := time.Duration(0)
for i := 1; i <= maxRequests; i++ {
// Check for cancellation before starting the loop
if ctx.Err() != nil {
break
}
start := time.Now()
wg := &sync.WaitGroup{}
wg.Add(i)
for range i {
go func() {
defer wg.Done()
select {
case <-ctx.Done():
fmt.Println("Operation cancelled.")
return
default:
time.Sleep(delay)
client.MakeRequest(url)
}
}()
}
wg.Wait()
duration := time.Since(start)
fmt.Printf("Parallel Requests: %d, Time Taken: %s\n", i, duration)
if minTime == 0 || duration < minTime {
minTime = duration
optimal = i
}
}
fmt.Printf("\nOptimal Number of Parallel TCP Requests: %d\n", optimal)
}

10
go.mod
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@ -1,12 +1,10 @@
module notashelf.dev/tct
go 1.22.2
go 1.24.3
require github.com/stretchr/testify v1.9.0
require github.com/spf13/cobra v1.9.1
require (
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/stretchr/objx v0.5.2 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
github.com/inconshreveable/mousetrap v1.1.0 // indirect
github.com/spf13/pflag v1.0.6 // indirect
)

18
go.sum
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@ -1,12 +1,10 @@
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY=
github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
github.com/spf13/cobra v1.9.1 h1:CXSaggrXdbHK9CF+8ywj8Amf7PBRmPCOJugH954Nnlo=
github.com/spf13/cobra v1.9.1/go.mod h1:nDyEzZ8ogv936Cinf6g1RU9MRY64Ir93oCnqb9wxYW0=
github.com/spf13/pflag v1.0.6 h1:jFzHGLGAlb3ruxLB8MhbI6A8+AQX/2eW4qeyNZXNp2o=
github.com/spf13/pflag v1.0.6/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

32
internal/tct/client.go Normal file
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package tct
import (
"fmt"
"io"
"net/http"
)
type HttpClient interface {
Get(url string) (*http.Response, error)
}
type Client struct {
httpClient HttpClient
}
func NewClient() *Client {
return &Client{
httpClient: &http.Client{},
}
}
func (c *Client) MakeRequest(url string) {
resp, err := c.httpClient.Get(url)
if err != nil {
fmt.Println(err)
return
}
defer resp.Body.Close()
body, _ := io.ReadAll(resp.Body)
_ = body
}

46
internal/tct/client_test.go Normal file
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package tct
import (
"net/http"
"testing"
)
type MockHttpClient struct {
GetFunc func(url string) (*http.Response, error)
}
func (m *MockHttpClient) Get(url string) (*http.Response, error) {
return m.GetFunc(url)
}
func TestClientMakeRequest(t *testing.T) {
tests := []struct {
name string
url string
}{
{
name: "valid URL",
url: "http://example.com",
},
{
name: "another valid URL",
url: "https://google.com",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
mockClient := &MockHttpClient{
GetFunc: func(url string) (*http.Response, error) {
return &http.Response{
StatusCode: 200,
Body: http.NoBody,
}, nil
},
}
client := &Client{httpClient: mockClient}
client.MakeRequest(tt.url)
})
}
}

77
main.go
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@ -1,79 +1,10 @@
package main
import (
"context"
"flag"
"fmt"
"io"
"net/http"
"os"
"os/signal"
"sync"
"syscall"
"time"
)
import "notashelf.dev/tct/cmd"
type HttpClient interface {
Get(url string) (*http.Response, error)
}
var httpClient HttpClient = &http.Client{}
var version = "dev" // will be set by build process
func main() {
urlPtr := flag.String("url", "http://example.com", "URL to fetch")
maxRequestsPtr := flag.Int("max", 100, "Maximum number of parallel requests")
delayPtr := flag.Duration("delay", 0, "Delay between requests")
flag.Parse()
url := *urlPtr
maxRequests := *maxRequestsPtr
delay := *delayPtr
// context that listens for the interrupt signal.
ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
defer stop()
optimal := 0
minTime := time.Duration(0)
for i := 1; i <= maxRequests; i++ {
// check for cancellation before starting the loop
if ctx.Err() != nil {
break
}
start := time.Now()
wg := &sync.WaitGroup{}
wg.Add(i)
for j := 0; j < i; j++ {
go func() {
defer wg.Done()
select {
case <-ctx.Done():
fmt.Println("Operation cancelled.")
return
default:
time.Sleep(delay)
makeRequest(httpClient, url)
}
}()
}
wg.Wait()
duration := time.Since(start)
fmt.Printf("Parallel Requests: %d, Time Taken: %s\n", i, duration)
if minTime == 0 || duration < minTime {
minTime = duration
optimal = i
}
}
fmt.Printf("\nOptimal Number of Parallel TCP Requests: %d\n", optimal)
}
func makeRequest(client HttpClient, url string) {
resp, err := client.Get(url)
if err != nil {
fmt.Println(err)
return
}
defer resp.Body.Close()
body, _ := io.ReadAll(resp.Body)
_ = body
cmd.Version = version
cmd.Execute()
}

62
main_test.go
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@ -1,62 +0,0 @@
package main
import (
"bytes"
"errors"
"io"
"net/http"
"net/http/httptest"
"testing"
"github.com/stretchr/testify/mock"
)
type MockHttpClient struct {
mock.Mock
}
func (m *MockHttpClient) Get(url string) (*http.Response, error) {
args := m.Called(url)
return args.Get(0).(*http.Response), args.Error(1)
}
func TestMakeRequest(t *testing.T) {
tests := []struct {
name string
statusCode int
responseBody string
expectedError error
}{
{
name: "Successful request",
statusCode: http.StatusOK,
responseBody: "OK",
},
{
name: "Failed request",
statusCode: http.StatusInternalServerError,
responseBody: "",
expectedError: errors.New("request failed"),
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
mockClient := new(MockHttpClient)
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(tt.statusCode)
w.Write([]byte(tt.responseBody))
}))
defer server.Close()
mockClient.On("Get", server.URL).Return(&http.Response{
StatusCode: tt.statusCode,
Body: io.NopCloser(bytes.NewBufferString(tt.responseBody)),
}, tt.expectedError)
makeRequest(mockClient, server.URL)
mockClient.AssertExpectations(t)
})
}
}