Jan Novak
a588eb3b0e
probe.Measure performs an HTTP GET and records total elapsed time from request start to body fully read. main.go prints URL, status code, and total for each positional URL argument, exiting 1 on any failure. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"os"
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"time"
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"latprobe/internal/probe"
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)
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const usageText = `latprobe — measure per-phase HTTP request latency
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Usage:
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latprobe [flags] <url> [url ...]
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Flags:
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-n, --count int Number of requests per URL (default 1)
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--json Output results as JSON instead of text
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-h, --help Show this help
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Examples:
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latprobe https://example.com
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latprobe -n 5 https://example.com https://www.google.com
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latprobe --json https://example.com | jq .
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`
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func main() {
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count := flag.Int("count", 1, "number of requests per URL")
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flag.IntVar(count, "n", 1, "number of requests per URL (shorthand)")
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jsonOut := flag.Bool("json", false, "output results as JSON")
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flag.Usage = func() { fmt.Fprint(os.Stderr, usageText) }
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flag.Parse()
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urls := flag.Args()
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if len(urls) == 0 {
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fmt.Fprint(os.Stderr, usageText)
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os.Exit(1)
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}
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// --json and -n are parsed but not yet functional (wired in Steps 3–4).
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_ = jsonOut
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_ = count
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failed := false
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for _, url := range urls {
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r := probe.Measure(url)
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if r.Err != nil {
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fmt.Fprintf(os.Stderr, "error %s: %v\n", url, r.Err)
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failed = true
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continue
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}
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fmt.Printf("%-45s %d %v\n", r.URL, r.StatusCode, r.Total.Duration.Round(time.Millisecond))
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}
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if failed {
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os.Exit(1)
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}
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}
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