fix(bundler): migrate WebView2 offline installer to shorturl (#8292)

.changes/migrate-webview2-offline-shorturl.md

@@ -0,0 +1,5 @@
+---
+"tauri-bundler": 'patch:bug'
+---
+
+Migrate the WebView2 offline installer to use shorturl provided by Microsoft.

tooling/bundler/src/bundle/windows/msi/wix.rs

@@ -10,9 +10,8 @@ use crate::bundle::{
   windows::{
     sign::try_sign,
     util::{
-      download, download_and_verify, extract_zip, HashAlgorithm, WEBVIEW2_BOOTSTRAPPER_URL,
-      WEBVIEW2_X64_OFFLINE_INSTALLER_GUID, WEBVIEW2_X86_OFFLINE_INSTALLER_GUID,
-      WIX_OUTPUT_FOLDER_NAME, WIX_UPDATER_OUTPUT_FOLDER_NAME,
+      download_and_verify, download_webview2_bootstrapper, download_webview2_offline_installer,
+      extract_zip, HashAlgorithm, WIX_OUTPUT_FOLDER_NAME, WIX_UPDATER_OUTPUT_FOLDER_NAME,
     },
   },
 };
@@ -473,42 +472,15 @@ pub fn build_wix_app_installer(
       );
     }
     WebviewInstallMode::EmbedBootstrapper { silent: _ } => {
-      let webview2_bootstrapper_path = output_path.join("MicrosoftEdgeWebview2Setup.exe");
-      std::fs::write(
-        &webview2_bootstrapper_path,
-        download(WEBVIEW2_BOOTSTRAPPER_URL)?,
-      )?;
+      let webview2_bootstrapper_path = download_webview2_bootstrapper(&output_path)?;
       data.insert(
         "webview2_bootstrapper_path",
         to_json(webview2_bootstrapper_path),
       );
     }
     WebviewInstallMode::OfflineInstaller { silent: _ } => {
-      let guid = if arch == "x64" {
-        WEBVIEW2_X64_OFFLINE_INSTALLER_GUID
-      } else {
-        WEBVIEW2_X86_OFFLINE_INSTALLER_GUID
-      };
-      let offline_installer_path = dirs_next::cache_dir()
-        .unwrap()
-        .join("tauri")
-        .join("Webview2OfflineInstaller")
-        .join(guid)
-        .join(arch);
-      create_dir_all(&offline_installer_path)?;
       let webview2_installer_path =
-        offline_installer_path.join("MicrosoftEdgeWebView2RuntimeInstaller.exe");
-      if !webview2_installer_path.exists() {
-        std::fs::write(
-          &webview2_installer_path,
-          download(
-            &format!("https://msedge.sf.dl.delivery.mp.microsoft.com/filestreamingservice/files/{}/MicrosoftEdgeWebView2RuntimeInstaller{}.exe",
-              guid,
-              arch.to_uppercase(),
-            ),
-          )?,
-        )?;
-      }
+        download_webview2_offline_installer(&output_path.join(arch), arch)?;
       data.insert("webview2_installer_path", to_json(webview2_installer_path));
     }
   }

tooling/bundler/src/bundle/windows/nsis.rs

@@ -8,9 +8,9 @@ use crate::{
   bundle::{
     common::CommandExt,
     windows::util::{
-      download, download_and_verify, extract_zip, HashAlgorithm, NSIS_OUTPUT_FOLDER_NAME,
-      NSIS_UPDATER_OUTPUT_FOLDER_NAME, WEBVIEW2_BOOTSTRAPPER_URL,
-      WEBVIEW2_X64_OFFLINE_INSTALLER_GUID, WEBVIEW2_X86_OFFLINE_INSTALLER_GUID,
+      download, download_and_verify, download_webview2_bootstrapper,
+      download_webview2_offline_installer, extract_zip, HashAlgorithm, NSIS_OUTPUT_FOLDER_NAME,
+      NSIS_UPDATER_OUTPUT_FOLDER_NAME,
     },
   },
   Settings,
@@ -370,40 +370,15 @@ fn build_nsis_app_installer(
 
   match webview2_install_mode {
     WebviewInstallMode::EmbedBootstrapper { silent: _ } => {
-      let webview2_bootstrapper_path = tauri_tools_path.join("MicrosoftEdgeWebview2Setup.exe");
-      std::fs::write(
-        &webview2_bootstrapper_path,
-        download(WEBVIEW2_BOOTSTRAPPER_URL)?,
-      )?;
+      let webview2_bootstrapper_path = download_webview2_bootstrapper(tauri_tools_path)?;
       data.insert(
         "webview2_bootstrapper_path",
         to_json(webview2_bootstrapper_path),
       );
     }
     WebviewInstallMode::OfflineInstaller { silent: _ } => {
-      let guid = if arch == "x64" {
-        WEBVIEW2_X64_OFFLINE_INSTALLER_GUID
-      } else {
-        WEBVIEW2_X86_OFFLINE_INSTALLER_GUID
-      };
-      let offline_installer_path = tauri_tools_path
-        .join("Webview2OfflineInstaller")
-        .join(guid)
-        .join(arch);
-      create_dir_all(&offline_installer_path)?;
       let webview2_installer_path =
-        offline_installer_path.join("MicrosoftEdgeWebView2RuntimeInstaller.exe");
-      if !webview2_installer_path.exists() {
-        std::fs::write(
-          &webview2_installer_path,
-          download(
-            &format!("https://msedge.sf.dl.delivery.mp.microsoft.com/filestreamingservice/files/{}/MicrosoftEdgeWebView2RuntimeInstaller{}.exe",
-              guid,
-              arch.to_uppercase(),
-            ),
-          )?,
-        )?;
-      }
+        download_webview2_offline_installer(&tauri_tools_path.join(arch), arch)?;
       data.insert("webview2_installer_path", to_json(webview2_installer_path));
     }
     _ => {}

tooling/bundler/src/bundle/windows/util.rs

@@ -5,7 +5,7 @@
 use std::{
   fs::{create_dir_all, File},
   io::{Cursor, Read, Write},
-  path::Path,
+  path::{Path, PathBuf},
 };
 
 use log::info;
@@ -13,13 +13,61 @@ use sha2::Digest;
 use zip::ZipArchive;
 
 pub const WEBVIEW2_BOOTSTRAPPER_URL: &str = "https://go.microsoft.com/fwlink/p/?LinkId=2124703";
-pub const WEBVIEW2_X86_OFFLINE_INSTALLER_GUID: &str = "2c122012-898d-4a69-9ab6-aa50bbe81031";
-pub const WEBVIEW2_X64_OFFLINE_INSTALLER_GUID: &str = "0af26c79-02f0-4f06-a12d-116bc05ca860";
+pub const WEBVIEW2_OFFLINE_INSTALLER_X86_URL: &str =
+  "https://go.microsoft.com/fwlink/?linkid=2099617";
+pub const WEBVIEW2_OFFLINE_INSTALLER_X64_URL: &str =
+  "https://go.microsoft.com/fwlink/?linkid=2124701";
+pub const WEBVIEW2_URL_PREFIX: &str =
+  "https://msedge.sf.dl.delivery.mp.microsoft.com/filestreamingservice/files/";
 pub const NSIS_OUTPUT_FOLDER_NAME: &str = "nsis";
 pub const NSIS_UPDATER_OUTPUT_FOLDER_NAME: &str = "nsis-updater";
 pub const WIX_OUTPUT_FOLDER_NAME: &str = "msi";
 pub const WIX_UPDATER_OUTPUT_FOLDER_NAME: &str = "msi-updater";
 
+pub fn webview2_guid_path(url: &str) -> crate::Result<(String, String)> {
+  let agent = ureq::AgentBuilder::new().try_proxy_from_env(true).build();
+  let response = agent.head(url).call().map_err(Box::new)?;
+  let final_url = response.get_url();
+  let remaining_url = final_url.strip_prefix(WEBVIEW2_URL_PREFIX).ok_or_else(|| {
+    anyhow::anyhow!(
+      "WebView2 URL prefix mismatch. Expected `{}`, found `{}`.",
+      WEBVIEW2_URL_PREFIX,
+      final_url
+    )
+  })?;
+  let (guid, filename) = remaining_url.split_once('/').ok_or_else(|| {
+    anyhow::anyhow!(
+      "WebView2 URL format mismatch. Expected `<GUID>/<FILENAME>`, found `{}`.",
+      remaining_url
+    )
+  })?;
+  Ok((guid.into(), filename.into()))
+}
+
+pub fn download_webview2_bootstrapper(base_path: &Path) -> crate::Result<PathBuf> {
+  let file_path = base_path.join("MicrosoftEdgeWebview2Setup.exe");
+  if !file_path.exists() {
+    std::fs::write(&file_path, download(WEBVIEW2_BOOTSTRAPPER_URL)?)?;
+  }
+  Ok(file_path)
+}
+
+pub fn download_webview2_offline_installer(base_path: &Path, arch: &str) -> crate::Result<PathBuf> {
+  let url = if arch == "x64" {
+    WEBVIEW2_OFFLINE_INSTALLER_X64_URL
+  } else {
+    WEBVIEW2_OFFLINE_INSTALLER_X86_URL
+  };
+  let (guid, filename) = webview2_guid_path(url)?;
+  let dir_path = base_path.join(guid);
+  let file_path = dir_path.join(filename);
+  if !file_path.exists() {
+    create_dir_all(dir_path)?;
+    std::fs::write(&file_path, download(url)?)?;
+  }
+  Ok(file_path)
+}
+
 pub fn download(url: &str) -> crate::Result<Vec<u8>> {
   info!(action = "Downloading"; "{}", url);