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@daehee
Created September 28, 2020 14:46
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chromedp - get response headers
// 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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