webview2-com-sys
This crate implements unsafe Rust bindings for the WebView2 COM APIs using the Windows crate.
Getting Started
This crate has a friendlier wrapper in webview2-com.
DBX vendoring
DBX vendors this crate to make the Windows 7 WebView2 loader an explicit build input.
The crate source matches upstream webview2-com-sys 0.38.2.
build.rs selects the loader directory by target:
- The custom
x86_64-win7-windows-msvctarget useswin7/x64/. - Every other Windows target uses the upstream
x86/,x64/, orarm64/directory.
The old loader preparation scripts replaced a file inside the cargo registry.
That replacement was invisible to compile caches.
A release once shipped a binary linked against the wrong loader (see the comment in .github/workflows/release.yml).
The vendored copy removes that failure mode.
Loader provenance
| Directory | Source | WebView2 SDK | SHA256 |
|---|---|---|---|
x86/ |
crates.io webview2-com-sys 0.38.2 |
1.0.3650.58 | 6649ce9ca24e7a5693ee54178f42e0378004ce537d82d15354e6c9adb467bc16 (static) |
x64/ |
crates.io webview2-com-sys 0.38.2 |
1.0.3650.58 | 0659b741bde6348d4c4a6ec4ceb9af50e3d0048ed9cd3c8659bccbb61fde55ee (static) |
arm64/ |
crates.io webview2-com-sys 0.38.2 |
1.0.3650.58 | 506ffde430bee7f91f2ce1a078effb5289b7cec3b0c7283647f0842def524ab4 (static) |
win7/x64/ |
NuGet Microsoft.Web.WebView2 1.0.902.49 |
1.0.902.49 | aa5c26670f1b18d0fa2a56ac3f1ae30110c332a8bfbd555a7be3e548d1b0da3d (static), fdf978ba706578b05967d7f0181f462147864a5aa74f36016a62cb3d3dbe6909 (WebView2Loader.dll) |
build.rs verifies the two pinned win7/x64/ hashes at build time.
.github/scripts/prepare-webview2-win7-loader.ps1 verifies the same hashes and stages the loader DLL for the runtime probe.
License
The Rust source keeps the upstream MIT license. The Microsoft WebView2 loader files keep the Microsoft WebView2 SDK license. The repository commits them to build the offline Windows 7 / Server 2012 R2 installer.