84 lines
2.1 KiB
Go
84 lines
2.1 KiB
Go
// 429 详情探针：打印 429 响应的全部头部 + 响应体，看清 CDN 到底怎么限的。
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//
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// go run ./tools/probe429 -v <图片URL>
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package main
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import (
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"fmt"
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"io"
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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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func main() {
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if len(os.Args) < 2 {
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fmt.Fprintln(os.Stderr, "用法: go run ./tools/probe429 [-v] <图片URL>")
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os.Exit(1)
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}
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url := os.Args[len(os.Args)-1]
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verbose := false
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for _, a := range os.Args {
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if a == "-v" {
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verbose = true
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}
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}
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// 先探一张，看当前状态
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for round := 1; round <= 3; round++ {
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status, hdr, body, err := fullProbe(url, verbose)
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if err != nil {
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fmt.Printf("[第%d轮] 错误: %v\n", round, err)
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continue
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}
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fmt.Printf("[第%d轮] HTTP %d\n", round, status)
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if verbose || status == 429 {
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for _, k := range []string{
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"Retry-After", "X-RateLimit-Limit", "X-RateLimit-Remaining",
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"X-RateLimit-Reset", "X-Cache", "CF-RateLimited",
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"Server", "Content-Type", "X-Jetpack-Cache",
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} {
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if v := hdr.Get(k); v != "" {
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fmt.Printf(" %s: %s\n", k, v)
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}
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}
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if s := strings.TrimSpace(body); s != "" {
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fmt.Printf(" body: %.300s\n", s)
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}
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}
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if status == 200 {
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fmt.Println(" ✓ 这次成功了")
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break
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}
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if round < 3 {
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time.Sleep(3 * time.Second)
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}
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}
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}
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func fullProbe(url string, verbose bool) (int, http.Header, string, error) {
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tr := &http.Transport{ForceAttemptHTTP2: true}
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defer tr.CloseIdleConnections()
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client := &http.Client{Transport: tr, Timeout: 25 * time.Second}
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req, err := http.NewRequest(http.MethodGet, url, nil)
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if err != nil {
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return 0, nil, "", err
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}
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// 用我们客户端的头
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req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36")
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req.Header.Set("Accept", "image/webp,image/*,*/*;q=0.8")
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req.Header.Set("Referer", "https://migmg.ssuu.uk/")
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resp, err := client.Do(req)
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if err != nil {
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return 0, nil, "", err
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}
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defer resp.Body.Close()
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b, _ := io.ReadAll(io.LimitReader(resp.Body, 4096))
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fmt.Printf(" Proto=%s (2=HTTP/2, 1.1=HTTP/1.1)\n", resp.Proto)
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return resp.StatusCode, resp.Header, string(b), nil
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}
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