[blink GUI] windowsgui flag flash console windows.

[wsteel]

Describe the bug
when i build a local web application on windows, use build cmd

   go build -ldflags -H=windowsgui -o "test.exe"

,when i run , it's strange. first show a console windows, then the console window closed . console window will show twice. final my windows show out.
i don't kown how to block the console window's show . so need help.
when i use gin , this's ok . no console window show out.

To Reproduce
Steps to reproduce the behavior:

package main

import (
	"github.com/kataras/iris/v12"
	"github.com/raintean/blink"
	"log"
)

func main() {
	exit := make(chan bool)

	blink.SetDebugMode(true)
	errv := blink.InitBlink()
	if errv != nil {
		log.Fatal(errv)
	}

	go func() {
		app := iris.New()
		app.Get("/ping", func(ctx iris.Context) {
			ctx.WriteString("pong")
		})
		app.Run(iris.Addr("127.0.0.1:8080"))
	}()

	view := blink.NewWebView(false, 1366, 920)
	view.LoadURL("http://127.0.0.1:8080/ping")
	view.SetWindowTitle("test")
	view.MoveToCenter()
	view.ShowWindow()
	view.On("destroy", func(_ *blink.WebView) {
		close(exit)
	})

	<-exit
}

Screenshots

Desktop (please complete the following information):

• OS: windows 10

[kataras]

@wsteel seems like that one posted on

• cmd/link: Windows -H windowsgui stopped working in Go 1.10? golang/go#24232 (comment)
• Bundler on Windows creates console window. asticode/go-astilectron-bundler#16
• On Windows a cmdline box is shown alogn the main window asticode/go-astilectron-demo#22?

The problem does not derives from Iris or even blink or gin, it was a Go bug which will be fixed on the next release. You posted a misdirection sentence when i use gin , this's ok . no console window show out. which is invalid and mistaken, this problem occurs with any of them, even net/http. (See below for solution)

package main

import (
	"log"
	"net/http"

	"github.com/gin-gonic/gin"
	"github.com/kataras/iris/v12"
	"github.com/raintean/blink"
)

const (
	withNethttp uint8 = iota
	withIris
	withGin
)

const (
	runWith = withGin
	addr    = "127.0.0.1:8080"
)

func main() {
	exit := make(chan bool)

	blink.SetDebugMode(true)
	errv := blink.InitBlink()
	if errv != nil {
		log.Fatal(errv)
	}

	go func() {
		switch runWith {
		case withIris:
			app := iris.New()
			app.Get("/ping", func(ctx iris.Context) {
				ctx.WriteString("pong")
			})
			app.Run(iris.Addr(addr))
		case withGin:
			gin.SetMode(gin.ReleaseMode)
			router := gin.New()
			router.GET("/ping", func(ctx *gin.Context) {
				ctx.String(http.StatusOK, "pong")
			})
			router.Run(addr)
		default:
			mux := http.NewServeMux()
			mux.HandleFunc("/ping", func(w http.ResponseWriter, r *http.Request) {
				if r.Method != http.MethodGet {
					http.Error(w, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
					return
				}
				w.Write([]byte("pong"))
			})
			http.ListenAndServe(addr, mux)
		}
	}()

	view := blink.NewWebView(false, 1366, 920)
	view.LoadURL(addr + "/ping")
	view.SetWindowTitle("test")
	view.MoveToCenter()
	view.ShowWindow()
	view.On("destroy", func(_ *blink.WebView) {
		close(exit)
	})

	<-exit
}

Solution

Changing the GOPATH to the correct capitalization form e.g. "C:\Users$name\go" instead of "c:\users$name\go" is a workaround for on go 1.10.3.

^ golang/go#24232 (comment)

---

As you can see I am trying to help you even if it's not an Iris-relative issue. Please remember this, not everyone does that.

Thanks,
Gerasimos Maropoulos. Author of Iris.

[wsteel]

thanks for your help.
i try your code, all them show the console windows. because you just import "github.com/kataras/iris/v12" . then you drop iris code. the console disappeared. so i am so confused :<

try this code , just drop iris ...

package main

import (
	"log"
	"net/http"
	"github.com/gin-gonic/gin"
	"github.com/raintean/blink"
)

const (
	withNethttp uint8 = iota
	withGin
)

const (
	runWith = withNethttp
	addr    = "127.0.0.1:8080"
)

func main() { 
	exit := make(chan bool)

	blink.SetDebugMode(false)
	errv := blink.InitBlink()
	if errv != nil {
		log.Fatal(errv)
	}

	go func() {
		switch runWith {

		case withGin:
			gin.SetMode(gin.ReleaseMode)
			router := gin.New()
			router.GET("/ping", func(ctx *gin.Context) {
				ctx.String(http.StatusOK, "pong gin")
			})
			router.Run(addr)
		default:
			mux := http.NewServeMux()
			mux.HandleFunc("/ping", func(w http.ResponseWriter, r *http.Request) {
				if r.Method != http.MethodGet {
					http.Error(w, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
					return
				}
				w.Write([]byte("pong net"))
			})
			http.ListenAndServe(addr, mux)
		}
	}()

	view := blink.NewWebView(false, 1366, 920)
	view.LoadURL(addr + "/ping")
	view.SetWindowTitle("test")
	view.MoveToCenter()
	view.ShowWindow()
	view.On("destroy", func(_ *blink.WebView) {
		close(exit)
	})

	<-exit
}

[kataras]

OK that was a tough one, but I found the origin of the problem, it's not iris itself but a dependency that golog uses, the pio library which has a code which runs on init for windowsand runs a command to get the current windows version, which didn't contain the HideWindow attr.

pio/terminal/terminal_windows.go

Lines 31 to 35 in ea782b3

	stdout, stderr := &bytes.Buffer{}, &bytes.Buffer{}
	cmd := exec.Command("cmd", "ver")
	cmd.Stdout = stdout
	cmd.Stderr = stderr
	err := cmd.Run()

This is now fixed.

However, in order to see that in action, you have to modify your go mod to update kataras/golog@v0.0.10 which contains the updated kataras/pio@v0.0.2 dependency or wait for Iris v12.1.0 which is not far behind, all new features are almost implemented.

Your contribution @wsteel, especially with your last comment, was priceless. Thank you.

---

This issue was transferred from iris to pio.