Created
September 28, 2020 14:46
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chromedp - get response headers
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// https://stackoverflow.com/a/56602780 | |
package main | |
import ( | |
"context" | |
"io/ioutil" | |
"log" | |
"os" | |
"time" | |
"github.com/chromedp/cdproto/network" | |
"github.com/chromedp/chromedp" | |
) | |
func main() { | |
dir, err := ioutil.TempDir("", "chromedp-example") | |
if err != nil { | |
panic(err) | |
} | |
defer os.RemoveAll(dir) | |
opts := append(chromedp.DefaultExecAllocatorOptions[:], | |
chromedp.DisableGPU, | |
chromedp.NoDefaultBrowserCheck, | |
chromedp.Flag("headless", false), | |
chromedp.Flag("ignore-certificate-errors", true), | |
chromedp.Flag("window-size", "50,400"), | |
chromedp.UserDataDir(dir), | |
) | |
allocCtx, cancel := chromedp.NewExecAllocator(context.Background(), opts...) | |
defer cancel() | |
// also set up a custom logger | |
taskCtx, cancel := chromedp.NewContext(allocCtx, chromedp.WithLogf(log.Printf)) | |
defer cancel() | |
// create a timeout | |
taskCtx, cancel = context.WithTimeout(taskCtx, 10*time.Second) | |
defer cancel() | |
// ensure that the browser process is started | |
if err := chromedp.Run(taskCtx); err != nil { | |
panic(err) | |
} | |
// listen network event | |
listenForNetworkEvent(taskCtx) | |
chromedp.Run(taskCtx, | |
network.Enable(), | |
chromedp.Navigate(`http://www.google.com`), | |
chromedp.WaitVisible(`body`, chromedp.BySearch), | |
) | |
} | |
func listenForNetworkEvent(ctx context.Context) { | |
chromedp.ListenTarget(ctx, func(ev interface{}) { | |
switch ev := ev.(type) { | |
case *network.EventResponseReceived: | |
resp := ev.Response | |
if len(resp.Headers) != 0 { | |
log.Printf("received headers: %s", resp.Headers) | |
} | |
} | |
// other needed network Event | |
}) | |
} |
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