92 lines
2.2 KiB
Go
92 lines
2.2 KiB
Go
package main
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import (
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"crypto/tls"
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"flag"
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"fmt"
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"io/ioutil"
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"net/http"
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"os"
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"strings"
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"time"
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)
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// MeasureTTFB measures the Time to First Byte for the given URL.
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func MeasureTTFB(url string, cookies []string) (int64, int, error) {
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// Create a custom HTTP transport to allow measuring the TTFB.
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transport := &http.Transport{
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TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
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}
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client := &http.Client{
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Transport: transport,
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}
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// Create a new request.
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req, err := http.NewRequest("GET", url, nil)
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if err != nil {
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return 0, 0, err
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}
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// If cookies are provided, set them in the request header.
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if len(cookies) > 0 {
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for _, cookie := range cookies {
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if !strings.Contains(cookie, "=") {
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return 0, 0, fmt.Errorf("invalid cookie format")
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}
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req.Header.Add("Cookie", strings.TrimSpace(cookie))
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}
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}
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// Record the start time.
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start := time.Now()
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// Perform the request.
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resp, err := client.Do(req)
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if err != nil {
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return 0, 0, err
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}
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defer resp.Body.Close()
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// Measure the time taken to receive the first byte.
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ttfb := time.Since(start).Milliseconds()
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return ttfb, resp.StatusCode, nil
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}
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func main() {
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// Define and parse command-line flags.
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cookieFile := flag.String("c", "", "Path to file containing the authentication cookies")
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flag.Parse()
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// Check if the URL is provided as an argument.
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if flag.NArg() != 1 {
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fmt.Println("Usage: ttfb-go [-c cookieFile] <URL>")
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os.Exit(1)
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}
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url := flag.Arg(0)
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// Read the cookies from the specified file if provided.
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var cookies []string
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if *cookieFile != "" {
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data, err := ioutil.ReadFile(*cookieFile)
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if err != nil {
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fmt.Printf("Error reading cookie file: %v\n", err)
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os.Exit(1)
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}
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cookies = strings.Split(strings.TrimSpace(string(data)), ";")
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}
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// Measure the TTFB.
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ttfb, statusCode, err := MeasureTTFB(url, cookies)
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if err != nil {
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fmt.Printf("Error measuring TTFB: %v\n", err)
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os.Exit(1)
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}
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// Print the HTTP status code and TTFB.
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fmt.Printf("%d,%d\n", statusCode, ttfb)
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}
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