2017-07-01 01:17:38 +00:00
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package main
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import (
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"context"
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"flag"
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"fmt"
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"io/ioutil"
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"log"
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"net/http"
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"os"
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cdp "github.com/knq/chromedp"
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)
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var (
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flagPort = flag.Int("port", 8544, "port")
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)
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func main() {
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var err error
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flag.Parse()
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// create http server and result channel
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result := make(chan int, 1)
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mux := http.NewServeMux()
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mux.HandleFunc("/", func(res http.ResponseWriter, req *http.Request) {
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fmt.Fprintf(res, uploadHTML)
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})
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mux.HandleFunc("/upload", func(res http.ResponseWriter, req *http.Request) {
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f, _, err := req.FormFile("upload")
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if err != nil {
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http.Error(res, err.Error(), http.StatusBadRequest)
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return
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}
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defer f.Close()
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buf, err := ioutil.ReadAll(f)
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if err != nil {
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http.Error(res, err.Error(), http.StatusBadRequest)
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return
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}
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fmt.Fprintf(res, resultHTML, len(buf))
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result <- len(buf)
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})
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go http.ListenAndServe(fmt.Sprintf(":%d", *flagPort), mux)
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// create context
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ctxt, cancel := context.WithCancel(context.Background())
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defer cancel()
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// create chrome instance
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c, err := cdp.New(ctxt, cdp.WithLog(log.Printf))
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if err != nil {
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log.Fatal(err)
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}
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// get wd
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wd, err := os.Getwd()
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if err != nil {
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log.Fatal(err)
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}
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filepath := wd + "/main.go"
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// get some info about the file
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fi, err := os.Stat(filepath)
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if err != nil {
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log.Fatal(err)
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}
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// run task list
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var sz string
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err = c.Run(ctxt, upload(filepath, &sz))
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if err != nil {
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log.Fatal(err)
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}
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// shutdown chrome
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err = c.Shutdown(ctxt)
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if err != nil {
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log.Fatal(err)
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}
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// wait for chrome to finish
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err = c.Wait()
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if err != nil {
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log.Fatal(err)
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}
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log.Printf("original size: %d, upload size: %d", fi.Size(), <-result)
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}
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func upload(filepath string, sz *string) cdp.Tasks {
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return cdp.Tasks{
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cdp.Navigate(fmt.Sprintf("http://localhost:%d", *flagPort)),
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2017-07-01 03:14:42 +00:00
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cdp.SendKeys(`input[name="upload"]`, filepath, cdp.NodeVisible),
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2017-07-01 01:17:38 +00:00
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cdp.Click(`input[name="submit"]`),
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cdp.Text(`#result`, sz, cdp.ByID, cdp.NodeVisible),
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}
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}
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const (
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uploadHTML = `<!doctype html>
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<html>
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<body>
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<form method="POST" action="/upload" enctype="multipart/form-data">
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<input name="upload" type="file"/>
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<input name="submit" type="submit"/>
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</form>
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</body>
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</html>`
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resultHTML = `<!doctype html>
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<html>
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<body>
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<div id="result">%d</div>
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</body>
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</html>`
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)
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