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[v2] Fix websocket ipc timing bug. Use proper HTML parsing for injection.

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This commit is contained in:
Lea Anthony 2021-10-10 15:43:01 +11:00
parent dd7c6a3d58
commit 7caf6af91d
7 changed files with 163 additions and 932 deletions
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39
v2/internal/frontend/assetserver/assetserver_browser_dev.go
View File

@ -7,7 +7,9 @@ import (
"bytes"
"github.com/wailsapp/wails/v2/internal/frontend/runtime"
"github.com/wailsapp/wails/v2/pkg/options"
"golang.org/x/net/html"
"path/filepath"
"strings"
)
/*
@ -49,7 +51,11 @@ func (a *BrowserAssetServer) processIndexHTML() ([]byte, error) {
if err != nil {
return nil, err
}
indexHTML, err = injectHTML(string(indexHTML), `<div id="wails-spinner"></div>`)
htmlNode, err := getHTMLNode(indexHTML)
if err != nil {
return nil, err
}
err = appendSpinnerToBody(htmlNode)
if err != nil {
return nil, err
}
@ -57,19 +63,27 @@ func (a *BrowserAssetServer) processIndexHTML() ([]byte, error) {
if err != nil {
return nil, err
}
if wailsOptions.disableRuntimeInjection == false {
indexHTML, err = injectHTML(string(indexHTML), `<script src="/wails/runtime.js"></script>`)
if err != nil {
return nil, err
}
}
if wailsOptions.disableIPCInjection == false {
indexHTML, err = injectHTML(string(indexHTML), `<script src="/wails/ipc.js"></script>`)
err := insertScriptInHead(htmlNode, "/wails/ipc.js")
if err != nil {
return nil, err
}
}
return indexHTML, nil
if wailsOptions.disableRuntimeInjection == false {
err := insertScriptInHead(htmlNode, "/wails/runtime.js")
if err != nil {
return nil, err
}
}
var buffer bytes.Buffer
err = html.Render(&buffer, htmlNode)
if err != nil {
return nil, err
}
return buffer.Bytes(), nil
}
func (a *BrowserAssetServer) Load(filename string) ([]byte, string, error) {
@ -84,6 +98,13 @@ func (a *BrowserAssetServer) Load(filename string) ([]byte, string, error) {
content = runtime.WebsocketIPC
default:
content, err = a.loadFileFromDisk(filename)
if strings.HasSuffix(filename, ".js") {
var buffer bytes.Buffer
buffer.WriteString("window.awaitIPC('" + filename + "', ()=>{")
buffer.Write(content)
buffer.WriteString("});")
content = buffer.Bytes()
}
}
if err != nil {
return nil, "", err

79
v2/internal/frontend/assetserver/common.go
View File

@ -2,6 +2,7 @@ package assetserver
import (
"bytes"
"errors"
"fmt"
"golang.org/x/net/html"
"strings"
@ -12,7 +13,7 @@ type optionType string
const (
noAutoInject optionType = "noautoinject"
noAutoInjectRuntime optionType = "noautoinjectruntime"
noautoinjectipc optionType = "noautoinjectipc"
noAutoInjectIPC optionType = "noautoinjectipc"
)
type Options struct {
@ -29,7 +30,7 @@ func newOptions(optionString string) *Options {
case noAutoInject:
result.disableRuntimeInjection = true
result.disableIPCInjection = true
case noautoinjectipc:
case noAutoInjectIPC:
result.disableIPCInjection = true
case noAutoInjectRuntime:
result.disableRuntimeInjection = true
@ -86,3 +87,77 @@ func extractOptions(htmldata []byte) (*Options, error) {
}
return result, nil
}
func createScriptNode(scriptName string) *html.Node {
return &html.Node{
Type: html.ElementNode,
Data: "script",
Attr: []html.Attribute{
{
Key: "src",
Val: scriptName,
},
},
}
}
func createDivNode(id string) *html.Node {
return &html.Node{
Type: html.ElementNode,
Data: "div",
Attr: []html.Attribute{
{
Namespace: "",
Key: "id",
Val: id,
},
},
}
}
func insertScriptInHead(htmlNode *html.Node, scriptName string) error {
headNode := findFirstTag(htmlNode, "head")
if headNode == nil {
return errors.New("cannot find head in HTML")
}
scriptNode := createScriptNode(scriptName)
if headNode.FirstChild != nil {
headNode.InsertBefore(scriptNode, headNode.FirstChild)
} else {
headNode.AppendChild(scriptNode)
}
return nil
}
func appendSpinnerToBody(htmlNode *html.Node) error {
bodyNode := findFirstTag(htmlNode, "body")
if bodyNode == nil {
return errors.New("cannot find body in HTML")
}
scriptNode := createDivNode("wails-spinner")
bodyNode.AppendChild(scriptNode)
return nil
}
func getHTMLNode(htmldata []byte) (*html.Node, error) {
return html.Parse(bytes.NewReader(htmldata))
}
func findFirstTag(htmlnode *html.Node, tagName string) *html.Node {
var extractor func(*html.Node) *html.Node
var result *html.Node
extractor = func(node *html.Node) *html.Node {
if node.Type == html.ElementNode && node.Data == tagName {
return node
}
for child := node.FirstChild; child != nil; child = child.NextSibling {
result := extractor(child)
if result != nil {
return result
}
}
return nil
}
result = extractor(htmlnode)
return result
}

61
v2/internal/frontend/runtime/dev/build.js
View File

@ -1,50 +1,15 @@
/* jshint esversion: 8 */
const esbuild = require("esbuild");
const sveltePlugin = require("esbuild-svelte");
let sveltePlugin = {
name: 'svelte',
setup(build) {
let svelte = require('svelte/compiler');
let path = require('path');
let fs = require('fs');
build.onLoad({filter: /\.svelte$/}, async (args) => {
// This converts a message in Svelte's format to esbuild's format
let convertMessage = ({message, start, end}) => {
let location;
if (start && end) {
let lineText = source.split(/\r\n|\r|\n/g)[start.line - 1];
let lineEnd = start.line === end.line ? end.column : lineText.length;
location = {
file: filename,
line: start.line,
column: start.column,
length: lineEnd - start.column,
lineText,
};
}
return {text: message, location};
};
// Load the file from the file system
let source = await fs.promises.readFile(args.path, 'utf8');
let filename = path.relative(process.cwd(), args.path);
// Convert Svelte syntax to JavaScript
try {
let {js, warnings} = svelte.compile(source, {filename});
let contents = js.code + `//# sourceMappingURL=` + js.map.toUrl();
return {contents, warnings: warnings.map(convertMessage)};
} catch (e) {
return {errors: [convertMessage(e)]};
}
});
}
};
require('esbuild').build({
minify: true,
entryPoints: ['main.js'],
bundle: true,
outfile: '../ipc_websocket.js',
plugins: [sveltePlugin],
}).catch(() => process.exit(1));
esbuild
.build({
entryPoints: ["main.js"],
bundle: true,
minify: true,
outfile: "../ipc_websocket.js",
plugins: [sveltePlugin({compileOptions: {css: true}})],
logLevel: "info",
sourcemap: "inline",
})
.catch(() => process.exit(1));

24
v2/internal/frontend/runtime/dev/main.js
View File

@ -14,11 +14,21 @@ import Overlay from "./Overlay.svelte";
import {hideOverlay, showOverlay} from "./store";
let components = {};
window.ipcCallbacks = [];
window.ipcCallbackNames = [];
// Sets up the overlay
components.overlay = new Overlay({
target: document.body,
anchor: document.querySelector('#wails-spinner'),
window.awaitIPC = (name, callback) => {
if (!window.ipcCallbacks) return callback;
log("Queuing '" + name + "' for execution once ipc ready.");
window.ipcCallbackNames.push(name);
window.ipcCallbacks.push(callback);
};
window.addEventListener('DOMContentLoaded', () => {
components.overlay = new Overlay({
target: document.body,
anchor: document.querySelector('#wails-spinner'),
});
});
let websocket = null;
@ -40,6 +50,12 @@ function setupIPCBridge() {
window.WailsInvoke = (message) => {
websocket.send(message);
};
for (let i = 0; i < window.ipcCallbacks.length; i++) {
log("Executing JS: " + window.ipcCallbackNames[i]);
window.ipcCallbacks[i]();
}
delete window.ipcCallbacks;
delete window.ipcCallbackNames;
}
// Handles incoming websocket connections

880
v2/internal/frontend/runtime/dev/package-lock.json generated
View File

@ -1,871 +1,8 @@
{
"name": "dev",
"version": "2.0.0",
"lockfileVersion": 2,
"lockfileVersion": 1,
"requires": true,
"packages": {
"": {
"version": "2.0.0",
"license": "ISC",
"devDependencies": {
"esbuild": "^0.12.17",
"npm-run-all": "^4.1.5",
"svelte": "^3.42.2"
}
},
"node_modules/ansi-styles": {
"version": "3.2.1",
"resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
"integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
"dev": true,
"dependencies": {
"color-convert": "^1.9.0"
},
"engines": {
"node": ">=4"
}
},
"node_modules/balanced-match": {
"version": "1.0.2",
"resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
"integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
"dev": true
},
"node_modules/brace-expansion": {
"version": "1.1.11",
"resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
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3
v2/internal/frontend/runtime/dev/package.json
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@ -12,6 +12,7 @@
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9
v2/internal/frontend/runtime/ipc_websocket.js
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