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Topic: mod_wasm Available

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Topic: mod_wasm Available

[gzurl]

Download on the VS17 download page

03 July Update to 0.12.1, see below

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

[gzurl]

Steffen,

Just tested your build and it worked for me!


Thanks!

[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

[gzurl]

Hola!

Just a heads up about recent mod_wasm v0.11.x releases: https://github.com/vmware-labs/mod_wasm/releases

v0.11.0 allows Wasm modules to return any output type via stdout, including binaries with non UTF-8 bytes sequences or \0 NULL terminators in the middle.
v0.11.1 fixes an issue where a new thread could not create a new Wasm execution context while another thread was running a Wasm module.

Cheers!

[gzurl]

Hola!

We just released a mod_wasm security update (v0.11.2) to address a recent CVE (low severity). More details in the changelog.

Best,
Jesús

[gzurl]

Hi,

Just released v0.11.3 to downgrade a dependency that introduced a regression issue on Windows.

https://github.com/vmware-labs/mod_wasm/releases/tag/v0.11.3

Cheers,
Jesús

[gzurl]

Hola,

We just released mod_wasm v0.12.0!

This new version introduces a new directive, WasmMapCGIFileNames, providing the ability to configure CGI applications using custom guest directories, eliminating the need for both the host and the guest to use the same paths. It also normalizes SCRIPT_FILENAME to use Unix-like forward slashes. This feature is particularly helpful when setting up Windows applications, as it allows for the use of paths that may not be compatible in Windows (with backslashes and drive letters).

Looking forward to your feedback.

Cheers,
Jesús

[gzurl]

Hola!

mod_wasm v0.12.1 available!

This maintenance release bumps Wasmtime to 10.0.1, including preliminary support for WASI preview 2 among other improvements and fixes.

Best,
Jesús