Topic: mod_wasm 0.10.3 Available

[gzurl]

Download on the VS17 download page

10 March 2023 Update to 0.10.3

Hello Apache Lounge folks!
I’m Jesús González, and I am part of VMware’s Wasm Labs, a group focused on creating open-source tools for WebAssembly (Wasm).

We have created mod_wasm, an Apache module for running WebAssembly binaries inside httpd, and we are working with the ASF to contribute it upstream.

In our GitHub repo https://github.com/vmware-labs/mod_wasm you can find a quick demo for both Python and PHP Wasm binaries.

The hello_wasm demo is as simple as:

[James Blond]

Hello Jesús,
since it is a single C file you may take a look at how mod_log_rotate is compiled against the binaries from ApacheLounge https://github.com/JBlond/mod_log_rotate/blob/master/build.md

if there is still a question please ask again.

[gzurl]

Thanks for your feedback, James!
The insight about mod_log_rotate was very useful

I managed to add the missing parts in the example and build both libraries mod_wasm.so and wasm_runtime.dll. They worked perfectly under the httpd-2.4.54-win64-VS17 provided by Apache Lounge

Compile (mod_wasm.c --> mod_wasm.obj):

[James Blond]

it would be nice if you could add the windows compiling steps to https://github.com/vmware-labs/mod_wasm/tree/main/mod_wasm

[Xing]

How to build wasm_runtime.dll ?

[gzurl]

Hi,

@James, nice feedback. Windows build instructions are now included at https://github.com/vmware-labs/mod_wasm/tree/main/mod_wasm

@Xing, Rust will automatically target the host platform. You can find detailed instructions here: https://github.com/vmware-labs/mod_wasm/tree/main/wasm_runtime

Hope this helps!

[Xing]

Followed the steps at https://github.com/vmware-labs/mod_wasm/tree/main/wasm_runtime

All fine with cargo install cbindgen.

Changed to the wasm_runtime folder.

Then what to do ? make all not recognized as command.

[Xing]

Ah builds the .dll

In x64 command prompt (vcvarsall.bat).

Changed to the wasm_runtime folder.

did only: cargo build --release

And surprise there is a wasm_runtime.dll in folder wasm_runtime\target\release

[Steffen]

Thanks! Xing for the pointers.

Jesus, is cargo build --release the good way to get the .dll ?

Was able to build.

Using Visual Studio 2022 Professional, in the compile/link above you are using community.

Tested with Hello Wasm ( https://github.com/vmware-labs/mod_wasm/tree/main/examples )

LoadModule wasm_module modules/mod_wasm.so
<Location /hello-wasm>
SetHandler wasm-handler
WasmModule C:\Apache24\modules/hello_wasm.wasm
</Location>

And get in de Browser : Hello, Wasm! @stdout
and in the Apache error.log : Hello, Wasm! @stderr

Have not yet figured out how to test with PHP ?

[gzurl]

Yes, as @Xing pointed out, running `cargo build --release` will generate the `wasm_runtime.dll` dependency needed to run mod_wasm.
The `make all` command (assuming Make is present), will in addition generate the C bindings from Rust using the cbindgen package. We are providing those bindings in the mod_wasm repo (`wasm_runtime.h`) so that is why executing just `cargo build --release` is enough.

@Steffen, I do believe both Visual Studio 2022 Professional and Community can be used. The key is to ensure dependencies are met (i.e.: MSVC C++ x64/x86 build tools and Windows SDK).
Regarding the examples you tried, `hello_wasm` worked as expected. For PHP, I identified an unexpected behavior and we are looking into it. It seems more related to the PHP Wasm build rather than mod_wasm itself. We'll keep you updated.

In the meantime, I'd suggest trying the Python examples instead with the following Apache configuration and this Python Wasm build: https://github.com/tiran/cpython-wasm-test/releases/download/v3.11.0/Python-3.11.0-wasm32-wasi-16.zip

[Steffen]

When others want to test/use :

On the VS17 Download page.

Please comment !

[gzurl]

Steffen,

Just tested your build and it worked for me!


Thanks!

[Steffen]

Added to te VS17 download page https://www.apachelounge.com/download/

[gzurl]

These are great news! Thanks!

@Steffen, how do you want us to notify Apache Lounge for new mod_wasm releases? New topic in the forum with the new features/fixes?

[Beltran]

Hi @Steffen, would be possible to have the mod_wasm extension for VS16? Thanks

[admin]

The VS17 version is compatible with VS16.

[gzurl]

Hola!

We just released a mod_wasm security update (v0.10.3) to address two recently disclosed CVEs (one critical) of Wasmtime, the WebAssembly runtime mod_wasm uses.

Further details can be found in this article and in the mod_wasm changelog.

Let us know if you find any issues.

Cheers!
Jesús

[Steffen]

Version 0.10.3 available on the VS17 download page.