feat: implement InjectContext for dynamic resource injection

2026-02-04 04:30:06 +00:00 · 2024-12-17 22:03:21 +08:00
parent 896221e83e
commit 5910c52021
2 changed files with 111 additions and 12 deletions
--- a/src/lib/inject.ts
+++ b/src/lib/inject.ts
@@ -0,0 +1,104 @@
+export const InjectContext = (content: string) => {
+  const tempDiv = document.createElement("div")
+  tempDiv.innerHTML = content
+
+  const INJECTION_MARK = "data-injected" // 自定义属性标识
+
+  // 清理已有的注入资源
+  const cleanInjectedResources = () => {
+    document.querySelectorAll(`[${INJECTION_MARK}]`).forEach((node) => node.remove())
+  }
+
+  const loadExternalScript = (scriptElement: HTMLScriptElement): Promise<void> => {
+    return new Promise((resolve, reject) => {
+      const script = document.createElement("script")
+      script.src = scriptElement.src
+      script.async = false // 保持顺序执行
+      script.setAttribute(INJECTION_MARK, "true") // 添加标识
+      script.onload = () => resolve()
+      script.onerror = () => reject(new Error(`Failed to load script: ${scriptElement.src}`))
+      document.head.appendChild(script)
+    })
+  }
+
+  const executeInlineScript = (scriptElement: HTMLScriptElement): void => {
+    const script = document.createElement("script")
+    script.textContent = scriptElement.textContent
+    script.setAttribute(INJECTION_MARK, "true") // 添加标识
+    document.body.appendChild(script)
+  }
+
+  const loadStyle = (styleElement: HTMLStyleElement): Promise<void> => {
+    return new Promise((resolve, reject) => {
+      if ((styleElement as any).href) {
+        // 处理 <link>
+        const link = document.createElement("link")
+        link.rel = "stylesheet"
+        link.href = (styleElement as any).href
+        link.setAttribute(INJECTION_MARK, "true") // 添加标识
+        link.onload = () => resolve()
+        link.onerror = () => reject(new Error(`Failed to load stylesheet: ${link.href}`))
+        document.head.appendChild(link)
+      } else {
+        const style = document.createElement("style")
+        style.textContent = styleElement.textContent
+        style.setAttribute(INJECTION_MARK, "true") // 添加标识
+        document.head.appendChild(style)
+        resolve()
+      }
+    })
+  }
+
+  const handlers: { [key: string]: (element: HTMLElement) => Promise<void> } = {
+    SCRIPT: (element) => {
+      const scriptElement = element as HTMLScriptElement
+      if (scriptElement.src) {
+        // 加载外部脚本
+        return loadExternalScript(scriptElement)
+      } else {
+        // 推迟执行内联脚本，后续手动执行
+        return Promise.resolve()
+      }
+    },
+    STYLE: (element) => loadStyle(element as HTMLStyleElement),
+    META: (element) => {
+      const meta = element.cloneNode(true) as HTMLElement
+      meta.setAttribute(INJECTION_MARK, "true") // 添加标识
+      document.head.appendChild(meta) // 将 meta 标签插入到 <head>
+      return Promise.resolve()
+    },
+    DEFAULT: (element) => {
+      element.setAttribute(INJECTION_MARK, "true") // 添加标识
+      document.body.appendChild(element)
+      return Promise.resolve()
+    },
+  }
+
+  // 开始注入前清理已有资源
+  cleanInjectedResources()
+
+  const externalScriptQueue: Promise<void>[] = []
+
+  Array.from(tempDiv.childNodes).forEach((node) => {
+    if (node.nodeType === Node.ELEMENT_NODE) {
+      const element = node as HTMLElement
+      if (element.tagName === "SCRIPT" && !(element as HTMLScriptElement).src) {
+        // 直接执行内联脚本
+        executeInlineScript(element as HTMLScriptElement)
+      } else {
+        const handler = handlers[element.tagName] || handlers.DEFAULT
+        externalScriptQueue.push(handler(element))
+      }
+    } else if (node.nodeType === Node.TEXT_NODE) {
+      document.body.appendChild(document.createTextNode(node.textContent || ""))
+    }
+  })
+
+  return Promise.all(externalScriptQueue)
+    .then(() => {
+      console.log("All resources have been injected successfully.")
+    })
+    .catch((error) => {
+      console.error("Error during resource injection:", error)
+    })
+}
--- a/src/routes/root.tsx
+++ b/src/routes/root.tsx
@@ -3,7 +3,8 @@ import { ThemeProvider } from "@/components/theme-provider"
 import { Toaster } from "@/components/ui/sonner"
 import useSetting from "@/hooks/useSetting"
 import i18n from "@/lib/i18n"
-import { useCallback, useEffect } from "react"
+import { InjectContext } from "@/lib/inject"
+import { useEffect } from "react"
 import { useTranslation } from "react-i18next"
 import { Outlet } from "react-router-dom"

@@ -15,14 +16,6 @@ export default function Root() {
        document.title = settingData?.site_name || "哪吒监控 Nezha Monitoring"
    }, [settingData])

-    const InjectContext = useCallback((content: string) => {
-        document.getElementById("nezha-custom-code")?.remove()
-        const tempDiv = document.createElement("div")
-        tempDiv.id = "nezha-custom-code"
-        tempDiv.innerHTML = content
-        document.body.appendChild(tempDiv)
-    }, [])
-
    if (error) {
        throw error
    }
@@ -35,9 +28,11 @@ export default function Root() {
        i18n.changeLanguage(settingData?.language)
    }

-    if (settingData?.custom_code_dashboard) {
-        InjectContext(settingData?.custom_code_dashboard)
-    }
+    useEffect(() => {
+        if (settingData?.custom_code_dashboard) {
+            InjectContext(settingData?.custom_code)
+        }
+    }, [settingData?.custom_code_dashboard])

    return (
        <ThemeProvider defaultTheme="system" storageKey="vite-ui-theme">