[assetserver] Add linux platform implementation (#2543)

* v3 parser: add tests for model generation

* v3 parser: use single quotes for got model.ts

* v3 parser: fixes for some failing tests

* v3 parser: misc simplification and cleanup

* v3 parser: fix model tests when no structs returned

* v3 parser: fix last failing test case

* Update contributors list

* v3 parser: update README

* Revert "Update contributors list"

This reverts commit f429d2ba890020d7ff0772e6207830508261b489.

* Changelog: add line about my contribution

.github/workflows/push.yml

@@ -22,12 +22,12 @@ jobs:
             website/**/*.json
 
       - name: Set node
-        if: steps.verify-changed-files.outputs.files_changed != 'true'
         uses: actions/setup-node@v2
         with:
           node-version: 16.x
 
       - name: Push files
+        if: steps.verify-changed-files.outputs.files_changed == 'true'
         env:
           CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}
         run: |

v2/internal/frontend/desktop/linux/frontend.go

@@ -78,7 +78,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"log"
-	"net/http"
 	"net/url"
 	"os"
 	"runtime"
@@ -88,6 +87,7 @@ import (
 	"unsafe"
 
 	"github.com/wailsapp/wails/v2/pkg/assetserver"
+	"github.com/wailsapp/wails/v2/pkg/assetserver/webview"
 
 	"github.com/wailsapp/wails/v2/internal/binding"
 	"github.com/wailsapp/wails/v2/internal/frontend"
@@ -166,10 +166,7 @@ func NewFrontend(ctx context.Context, appoptions *options.App, myLogger *logger.
 		}
 		result.assets = assets
 
-		// Start 10 processors to handle requests in parallel
-		for i := 0; i < 10; i++ {
-			go result.startRequestProcessor()
-		}
+		go result.startRequestProcessor()
 	}
 
 	go result.startMessageProcessor()
@@ -461,50 +458,16 @@ func processMessage(message *C.char) {
 	messageBuffer <- goMessage
 }
 
-var requestBuffer = make(chan unsafe.Pointer, 100)
+var requestBuffer = make(chan webview.Request, 100)
 
 func (f *Frontend) startRequestProcessor() {
 	for request := range requestBuffer {
-		f.processRequest(request)
-		C.g_object_unref(C.gpointer(request))
+		f.assets.ServeWebViewRequest(request)
+		request.Release()
 	}
 }
 
 //export processURLRequest
 func processURLRequest(request unsafe.Pointer) {
-	// Increment reference counter to allow async processing, will be decremented after the processing
-	// has been finished by a worker.
-	C.g_object_ref(C.gpointer(request))
-	requestBuffer <- request
-}
-
-func (f *Frontend) processRequest(request unsafe.Pointer) {
-	req := (*C.WebKitURISchemeRequest)(request)
-	uri := C.webkit_uri_scheme_request_get_uri(req)
-	goURI := C.GoString(uri)
-
-	rw := &webKitResponseWriter{req: req}
-	defer rw.Close()
-
-	f.assets.ProcessHTTPRequestLegacy(
-		rw,
-		func() (*http.Request, error) {
-			method := webkit_uri_scheme_request_get_http_method(req)
-			r, err := http.NewRequest(method, goURI, nil)
-			if err != nil {
-				return nil, err
-			}
-			r.Header = webkit_uri_scheme_request_get_http_headers(req)
-
-			if r.URL.Host != f.startURL.Host {
-				if r.Body != nil {
-					r.Body.Close()
-				}
-
-				return nil, fmt.Errorf("Expected host '%s' in request, but was '%s'", f.startURL.Host, r.URL.Host)
-			}
-
-			return r, nil
-		})
-
+	requestBuffer <- webview.NewRequest(request)
 }

v2/internal/frontend/desktop/linux/webkit2.go

@@ -12,10 +12,12 @@ import (
 
 	"github.com/wailsapp/wails/v2/pkg/options"
 	"github.com/wailsapp/wails/v2/pkg/options/linux"
+
+	"github.com/wailsapp/wails/v2/pkg/assetserver/webview"
 )
 
 func validateWebKit2Version(options *options.App) {
-	if C.webkit_get_major_version() == 2 && C.webkit_get_minor_version() >= webkit2MinMinorVersion {
+	if C.webkit_get_major_version() == 2 && C.webkit_get_minor_version() >= webview.Webkit2MinMinorVersion {
 		return
 	}
 
@@ -24,6 +26,6 @@ func validateWebKit2Version(options *options.App) {
 		msg = options.Linux.Messages
 	}
 
-	v := fmt.Sprintf("2.%d.0", webkit2MinMinorVersion)
+	v := fmt.Sprintf("2.%d.0", webview.Webkit2MinMinorVersion)
 	showModalDialogAndExit("WebKit2GTK", fmt.Sprintf(msg.WebKit2GTKMinRequired, v))
 }

v2/pkg/assetserver/assetserver.go

@@ -2,8 +2,11 @@ package assetserver
 
 import (
 	"bytes"
+	"fmt"
+	"math/rand"
 	"net/http"
 	"net/http/httptest"
+	"strings"
 
 	"golang.org/x/net/html"
 
@@ -42,6 +45,9 @@ type AssetServer struct {
 	// Use http based runtime
 	runtimeHandler RuntimeHandler
 
+	// plugin scripts
+	pluginScripts map[string]string
+
 	assetServerWebView
 }
 
@@ -89,6 +95,16 @@ func (d *AssetServer) UseRuntimeHandler(handler RuntimeHandler) {
 	d.runtimeHandler = handler
 }
 
+func (d *AssetServer) AddPluginScript(pluginName string, script string) {
+	if d.pluginScripts == nil {
+		d.pluginScripts = make(map[string]string)
+	}
+	pluginName = strings.ReplaceAll(pluginName, "/", "_")
+	pluginName = html.EscapeString(pluginName)
+	pluginScriptName := fmt.Sprintf("/plugin_%s_%d.js", pluginName, rand.Intn(100000))
+	d.pluginScripts[pluginScriptName] = script
+}
+
 func (d *AssetServer) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 	if isWebSocket(req) {
 		// Forward WebSockets to the distinct websocket handler if it exists
@@ -149,6 +165,11 @@ func (d *AssetServer) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 		d.writeBlob(rw, path, content)
 
 	default:
+		// Check if this is a plugin script
+		if script, ok := d.pluginScripts[path]; ok {
+			d.writeBlob(rw, path, []byte(script))
+			return
+		}
 		d.handler.ServeHTTP(rw, req)
 	}
 }
@@ -174,6 +195,13 @@ func (d *AssetServer) processIndexHTML(indexHTML []byte) ([]byte, error) {
 		return nil, err
 	}
 
+	// Inject plugins
+	for scriptName := range d.pluginScripts {
+		if err := insertScriptInHead(htmlNode, scriptName); err != nil {
+			return nil, err
+		}
+	}
+
 	var buffer bytes.Buffer
 	err = html.Render(&buffer, htmlNode)
 	if err != nil {

v2/pkg/assetserver/webview/request_linux.go

@@ -0,0 +1,85 @@
+//go:build linux
+// +build linux
+
+package webview
+
+/*
+#cgo linux pkg-config: gtk+-3.0 webkit2gtk-4.0 gio-unix-2.0
+
+#include "gtk/gtk.h"
+#include "webkit2/webkit2.h"
+*/
+import "C"
+
+import (
+	"io"
+	"net/http"
+	"unsafe"
+)
+
+// NewRequest creates as new WebViewRequest based on a pointer to an `WebKitURISchemeRequest`
+//
+// Please make sure to call Release() when finished using the request.
+func NewRequest(webKitURISchemeRequest unsafe.Pointer) Request {
+	webkitReq := (*C.WebKitURISchemeRequest)(webKitURISchemeRequest)
+	req := &request{req: webkitReq}
+	req.AddRef()
+	return req
+}
+
+var _ Request = &request{}
+
+type request struct {
+	req *C.WebKitURISchemeRequest
+
+	header http.Header
+	body   io.ReadCloser
+	rw     *responseWriter
+}
+
+func (r *request) AddRef() error {
+	C.g_object_ref(C.gpointer(r.req))
+	return nil
+}
+
+func (r *request) Release() error {
+	C.g_object_unref(C.gpointer(r.req))
+	return nil
+}
+
+func (r *request) URL() (string, error) {
+	return C.GoString(C.webkit_uri_scheme_request_get_uri(r.req)), nil
+}
+
+func (r *request) Method() (string, error) {
+	return webkit_uri_scheme_request_get_http_method(r.req), nil
+}
+
+func (r *request) Header() (http.Header, error) {
+	if r.header != nil {
+		return r.header, nil
+	}
+
+	r.header = webkit_uri_scheme_request_get_http_headers(r.req)
+	return r.header, nil
+}
+
+func (r *request) Body() (io.ReadCloser, error) {
+	if r.body != nil {
+		return r.body, nil
+	}
+
+	// WebKit2GTK has currently no support for request bodies.
+	r.body = http.NoBody
+
+	return r.body, nil
+}
+
+func (r *request) Response() ResponseWriter {
+	if r.rw != nil {
+		return r.rw
+	}
+
+	r.rw = &responseWriter{req: r.req}
+	return r.rw
+}

v2/pkg/assetserver/webview/responsewriter.go

@@ -1,9 +1,20 @@
 package webview
 
 import (
+	"errors"
 	"net/http"
 )
 
+const (
+	HeaderContentLength = "Content-Length"
+	HeaderContentType   = "Content-Type"
+)
+
+var (
+	errRequestStopped   = errors.New("request has been stopped")
+	errResponseFinished = errors.New("response has been finished")
+)
+
 // A ResponseWriter interface is used by an HTTP handler to
 // construct an HTTP response for the WebView.
 type ResponseWriter interface {

v2/pkg/assetserver/webview/responsewriter_darwin.go

@@ -69,16 +69,10 @@ import "C"
 
 import (
 	"encoding/json"
-	"errors"
 	"net/http"
 	"unsafe"
 )
 
-var (
-	errRequestStopped   = errors.New("request has been stopped")
-	errResponseFinished = errors.New("response has been finished")
-)
-
 var _ ResponseWriter = &responseWriter{}
 
 type responseWriter struct {

v2/pkg/assetserver/webview/responsewriter_linux.go

@@ -1,7 +1,7 @@
 //go:build linux
 // +build linux
 
-package linux
+package webview
 
 /*
 #cgo linux pkg-config: gtk+-3.0 webkit2gtk-4.0 gio-unix-2.0
@@ -20,28 +20,31 @@ import (
 	"strconv"
 	"syscall"
 	"unsafe"
-
-	"github.com/wailsapp/wails/v2/pkg/assetserver"
 )
 
-type webKitResponseWriter struct {
+type responseWriter struct {
 	req *C.WebKitURISchemeRequest
 
 	header      http.Header
 	wroteHeader bool
+	finished    bool
 
 	w    io.WriteCloser
 	wErr error
 }
 
-func (rw *webKitResponseWriter) Header() http.Header {
+func (rw *responseWriter) Header() http.Header {
 	if rw.header == nil {
 		rw.header = http.Header{}
 	}
 	return rw.header
 }
 
-func (rw *webKitResponseWriter) Write(buf []byte) (int, error) {
+func (rw *responseWriter) Write(buf []byte) (int, error) {
+	if rw.finished {
+		return 0, errResponseFinished
+	}
+
 	rw.WriteHeader(http.StatusOK)
 	if rw.wErr != nil {
 		return 0, rw.wErr
@@ -49,14 +52,14 @@ func (rw *webKitResponseWriter) Write(buf []byte) (int, error) {
 	return rw.w.Write(buf)
 }
 
-func (rw *webKitResponseWriter) WriteHeader(code int) {
-	if rw.wroteHeader {
+func (rw *responseWriter) WriteHeader(code int) {
+	if rw.wroteHeader || rw.finished {
 		return
 	}
 	rw.wroteHeader = true
 
 	contentLength := int64(-1)
-	if sLen := rw.Header().Get(assetserver.HeaderContentLength); sLen != "" {
+	if sLen := rw.Header().Get(HeaderContentLength); sLen != "" {
 		if pLen, _ := strconv.ParseInt(sLen, 10, 64); pLen > 0 {
 			contentLength = pLen
 		}
@@ -72,7 +75,7 @@ func (rw *webKitResponseWriter) WriteHeader(code int) {
 	}
 	rw.w = w
 
-	stream := C.g_unix_input_stream_new(C.int(rFD), gtkBool(true))
+	stream := C.g_unix_input_stream_new(C.int(rFD), C.gboolean(1))
 	defer C.g_object_unref(C.gpointer(stream))
 
 	if err := webkit_uri_scheme_request_finish(rw.req, code, rw.Header(), stream, contentLength); err != nil {
@@ -81,13 +84,22 @@ func (rw *webKitResponseWriter) WriteHeader(code int) {
 	}
 }
 
-func (rw *webKitResponseWriter) Close() {
+func (rw *responseWriter) Finish() error {
+	if !rw.wroteHeader {
+		rw.WriteHeader(http.StatusNotImplemented)
+	}
+
+	if rw.finished {
+		return nil
+	}
+	rw.finished = true
 	if rw.w != nil {
 		rw.w.Close()
 	}
+	return nil
 }
 
-func (rw *webKitResponseWriter) finishWithError(code int, err error) {
+func (rw *responseWriter) finishWithError(code int, err error) {
 	if rw.w != nil {
 		rw.w.Close()
 		rw.w = &nopCloser{io.Discard}

v2/pkg/assetserver/webview/webkit2_36.go

@@ -1,6 +1,6 @@
 //go:build linux && webkit2_36
 
-package linux
+package webview
 
 /*
 #cgo linux pkg-config: gtk+-3.0 webkit2gtk-4.0 libsoup-2.4
@@ -15,11 +15,9 @@ import (
 	"net/http"
 	"strings"
 	"unsafe"
-
-	"github.com/wailsapp/wails/v2/pkg/assetserver"
 )
 
-const webkit2MinMinorVersion = 36
+const Webkit2MinMinorVersion = 36
 
 func webkit_uri_scheme_request_get_http_method(req *C.WebKitURISchemeRequest) string {
 	method := C.GoString(C.webkit_uri_scheme_request_get_http_method(req))
@@ -51,7 +49,7 @@ func webkit_uri_scheme_request_finish(req *C.WebKitURISchemeRequest, code int, h
 	C.webkit_uri_scheme_response_set_status(resp, C.guint(code), cReason)
 	C.free(unsafe.Pointer(cReason))
 
-	cMimeType := C.CString(header.Get(assetserver.HeaderContentType))
+	cMimeType := C.CString(header.Get(HeaderContentType))
 	C.webkit_uri_scheme_response_set_content_type(resp, cMimeType)
 	C.free(unsafe.Pointer(cMimeType))
 

v2/pkg/assetserver/webview/webkit2_legacy.go

@@ -1,6 +1,6 @@
 //go:build linux && !webkit2_36
 
-package linux
+package webview
 
 /*
 #cgo linux pkg-config: gtk+-3.0 webkit2gtk-4.0
@@ -14,11 +14,9 @@ import (
 	"fmt"
 	"net/http"
 	"unsafe"
-
-	"github.com/wailsapp/wails/v2/pkg/assetserver"
 )
 
-const webkit2MinMinorVersion = 0
+const Webkit2MinMinorVersion = 0
 
 func webkit_uri_scheme_request_get_http_method(_ *C.WebKitURISchemeRequest) string {
 	return http.MethodGet
@@ -33,7 +31,7 @@ func webkit_uri_scheme_request_finish(req *C.WebKitURISchemeRequest, code int, h
 		return fmt.Errorf("StatusCodes not supported: %d - %s", code, http.StatusText(code))
 	}
 
-	cMimeType := C.CString(header.Get(assetserver.HeaderContentType))
+	cMimeType := C.CString(header.Get(HeaderContentType))
 	C.webkit_uri_scheme_request_finish(req, stream, C.gint64(streamLength), cMimeType)
 	C.free(unsafe.Pointer(cMimeType))
 	return nil

v3/TODO.md

@@ -41,4 +41,9 @@ Informal and incomplete list of things needed in v3.
 ## Runtime
 
 - [ ] To log or not to log?
-- [ ] Unify cross-platform events, eg. `onClose`
+- [ ] Unify cross-platform events, eg. `onClose`
+
+## Plugins
+
+- [ ] Move logins to `v3/plugins`
+- [ ] Expose application logger to plugins

v3/V3 Changes.md

@@ -108,3 +108,75 @@ This attribute specifies which javascript event should trigger the action. The d
 <button data-wml-event="hover-box" data-wml-trigger="mouseover">Hover over me!</button>
 ```
 
+## Plugins
+
+Plugins are a way to extend the functionality of your Wails application.
+
+### Creating a plugin
+
+Plugins are standard Go structure that adhere to the following interface:
+
+```go
+type Plugin interface {
+    Name() string
+    Init(*application.App) error
+    Shutdown() 
+    CallableByJS() []string
+    InjectJS() string
+}
+```
+
+The `Name()` method returns the name of the plugin. This is used for logging purposes.
+
+The `Init(*application.App) error` method is called when the plugin is loaded. The `*application.App`
+parameter is the application that the plugin is being loaded into. Any errors will prevent
+the application from starting.
+
+The `Shutdown()` method is called when the application is shutting down.
+
+The `CallableByJS()` method returns a list of exported functions that can be called from
+the frontend. These method names must exactly match the names of the methods exported
+by the plugin.
+
+The `InjectJS()` method returns JavaScript that should be injected into all windows as they are created. This is useful for adding custom JavaScript functions that complement the plugin.
+
+### Tips
+
+#### Enums
+
+In Go, enums are often defined as a type and a set of constants. For example:
+
+```go
+type MyEnum int
+
+const (
+    MyEnumOne MyEnum = iota
+    MyEnumTwo
+    MyEnumThree
+)
+```
+
+Due to incompatibility between Go and JavaScript, custom types cannot be used in this way. The best strategy is to use a type alias for float64:
+
+```go
+type MyEnum = float64
+
+const (
+    MyEnumOne MyEnum = iota
+    MyEnumTwo
+    MyEnumThree
+)
+```
+
+In Javascript, you can then use the following:
+
+```js
+const MyEnum = {
+    MyEnumOne: 0,
+    MyEnumTwo: 1,
+    MyEnumThree: 2
+}
+```
+
+- Why use `float64`? Can't we use `int`? 
+  - Because JavaScript doesn't have a concept of `int`. Everything is a `number`, which translates to `float64` in Go. There are also restrictions on casting types in Go's reflection package, which means using `int` doesn't work. 

v3/cmd/wails/main.go

@@ -25,6 +25,11 @@ func main() {
 	generate.NewSubCommandFunction("icons", "Generate icons", commands.GenerateIcons)
 	generate.NewSubCommandFunction("syso", "Generate Windows .syso file", commands.GenerateSyso)
 	generate.NewSubCommandFunction("bindings", "Generate bindings + models", commands.GenerateBindings)
+	plugin := app.NewSubCommand("plugin", "Plugin tools")
+	//plugin.NewSubCommandFunction("list", "List plugins", commands.PluginList)
+	plugin.NewSubCommandFunction("init", "Initialise a new plugin", commands.PluginInit)
+	//plugin.NewSubCommandFunction("add", "Add a plugin", commands.PluginAdd)
+
 	err := app.Run()
 	if err != nil {
 		pterm.Error.Println(err)

v3/examples/contextmenus/main.go

@@ -20,13 +20,13 @@ func main() {
 		Mac: application.MacOptions{
 			ApplicationShouldTerminateAfterLastWindowClosed: true,
 		},
+		Assets: application.AssetOptions{
+			FS: assets,
+		},
 	})
 
 	mainWindow := app.NewWebviewWindowWithOptions(&application.WebviewWindowOptions{
 		Title: "Context Menu Demo",
-		Assets: application.AssetOptions{
-			FS: assets,
-		},
 		Mac: application.MacWindow{
 			Backdrop:                application.MacBackdropTranslucent,
 			TitleBar:                application.MacTitleBarHiddenInsetUnified,
@@ -36,9 +36,6 @@ func main() {
 
 	app.NewWebviewWindowWithOptions(&application.WebviewWindowOptions{
 		Title: "Context Menu Demo",
-		Assets: application.AssetOptions{
-			FS: assets,
-		},
 		Mac: application.MacWindow{
 			Backdrop:                application.MacBackdropTranslucent,
 			TitleBar:                application.MacTitleBarHiddenInsetUnified,

v3/examples/drag-n-drop/main.go

@@ -20,13 +20,13 @@ func main() {
 		Mac: application.MacOptions{
 			ApplicationShouldTerminateAfterLastWindowClosed: true,
 		},
+		Assets: application.AssetOptions{
+			FS: assets,
+		},
 	})
 
 	window := app.NewWebviewWindowWithOptions(&application.WebviewWindowOptions{
 		Title: "Drag-n-drop Demo",
-		Assets: application.AssetOptions{
-			FS: assets,
-		},
 		Mac: application.MacWindow{
 			Backdrop:                application.MacBackdropTranslucent,
 			TitleBar:                application.MacTitleBarHiddenInsetUnified,

v3/examples/events/main.go

@@ -21,6 +21,9 @@ func main() {
 		Mac: application.MacOptions{
 			ApplicationShouldTerminateAfterLastWindowClosed: true,
 		},
+		Assets: application.AssetOptions{
+			FS: assets,
+		},
 	})
 
 	app.Events.On("myevent", func(e *application.CustomEvent) {
@@ -40,9 +43,6 @@ func main() {
 
 	app.NewWebviewWindowWithOptions(&application.WebviewWindowOptions{
 		Title: "Events Demo",
-		Assets: application.AssetOptions{
-			FS: assets,
-		},
 		Mac: application.MacWindow{
 			Backdrop:                application.MacBackdropTranslucent,
 			TitleBar:                application.MacTitleBarHiddenInsetUnified,
@@ -51,9 +51,6 @@ func main() {
 	})
 	app.NewWebviewWindowWithOptions(&application.WebviewWindowOptions{
 		Title: "Events Demo",
-		Assets: application.AssetOptions{
-			FS: assets,
-		},
 		Mac: application.MacWindow{
 			Backdrop:                application.MacBackdropTranslucent,
 			TitleBar:                application.MacTitleBarHiddenInsetUnified,

v3/examples/plain/main.go

@@ -15,9 +15,15 @@ func main() {
 		Mac: application.MacOptions{
 			ApplicationShouldTerminateAfterLastWindowClosed: true,
 		},
+		Assets: application.AssetOptions{
+			Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				w.WriteHeader(http.StatusOK)
+				w.Write([]byte(`<html><head><title>Plain Bundle</title></head><body><div class="main"><h1>Plain Bundle</h1><p>This is a plain bundle. It has no frontend code but this was Served by the AssetServer's Handler.</p><br/><br/><p data-wml-event="clicked">Clicking this paragraph emits an event...<p></div></body></html>`))
+			}),
+		},
 	})
 	// Create window
-	myWindow := app.NewWebviewWindowWithOptions(&application.WebviewWindowOptions{
+	app.NewWebviewWindowWithOptions(&application.WebviewWindowOptions{
 		Title: "Plain Bundle",
 		CSS:   `body { background-color: rgba(255, 255, 255, 0); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif; user-select: none; -ms-user-select: none; -webkit-user-select: none; } .main { color: white; margin: 20%; }`,
 		Mac: application.MacWindow{
@@ -26,12 +32,6 @@ func main() {
 			TitleBar:                application.MacTitleBarHiddenInsetUnified,
 		},
 		URL: "/",
-		Assets: application.AssetOptions{
-			Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-				w.WriteHeader(http.StatusOK)
-				w.Write([]byte(`<html><head><title>Plain Bundle</title></head><body><div class="main"><h1>Plain Bundle</h1><p>This is a plain bundle. It has no frontend code but this was Served by the AssetServer's Handler.</p><br/><br/><p data-wml-event="clicked">Clicking this paragraph emits an event...<p></div></body></html>`))
-			}),
-		},
 	})
 
 	app.Events.On("clicked", func(_ *application.CustomEvent) {

v3/examples/plugins/assets/index.html

@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Title</title>
+</head>
+<body>
+HELLO!
+</body>
+</html>

v3/examples/plugins/go.mod

@@ -0,0 +1,40 @@
+module plugin_demo
+
+go 1.20
+
+require github.com/wailsapp/wails/v3 v3.0.0-alpha.0
+
+require (
+	github.com/dustin/go-humanize v1.0.0 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 // indirect
+	github.com/leaanthony/slicer v1.5.0 // indirect
+	github.com/mattn/go-isatty v0.0.16 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pkg/browser v0.0.0-20210706143420-7d21f8c997e2 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	github.com/samber/lo v1.37.0 // indirect
+	github.com/wailsapp/mimetype v1.4.1 // indirect
+	github.com/wailsapp/wails/v2 v2.3.2-0.20230117193915-45c3a501d9e6 // indirect
+	golang.org/x/exp v0.0.0-20220930202632-ec3f01382ef9 // indirect
+	golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 // indirect
+	golang.org/x/net v0.7.0 // indirect
+	golang.org/x/sys v0.5.0 // indirect
+	golang.org/x/tools v0.1.12 // indirect
+	lukechampine.com/uint128 v1.2.0 // indirect
+	modernc.org/cc/v3 v3.40.0 // indirect
+	modernc.org/ccgo/v3 v3.16.13 // indirect
+	modernc.org/libc v1.22.3 // indirect
+	modernc.org/mathutil v1.5.0 // indirect
+	modernc.org/memory v1.5.0 // indirect
+	modernc.org/opt v0.1.3 // indirect
+	modernc.org/sqlite v1.21.0 // indirect
+	modernc.org/strutil v1.1.3 // indirect
+	modernc.org/token v1.0.1 // indirect
+)
+
+replace github.com/wailsapp/wails/v3 => ../..
+
+replace github.com/wailsapp/wails/v2 => ../../../v2

v3/examples/plugins/go.sum

@@ -0,0 +1,74 @@
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+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
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