CHANGELOG.md

Changelog

Unreleased

0.12.2 (2023/09/19)

This version bumps Wasmtime to 10.0.2 to include PR #6372.

libwasm_runtime.so

• Dependencies:
  • Upgrading Wasmtime dependency:
    • wasmtime from 10.0.1 to 10.0.2.
  • Updated cargo.lock dependencies via cargo update.

0.12.1 (2023/07/03)

This version bumps Wasmtime to 10.0.1 to include PR #6348 and other improvements such as preliminary support for WASI preview 2.

libwasm_runtime.so

• Dependencies:
  • Upgrading Wasmtime dependency:
    • wasmtime from 7.0.1 to 10.0.1.
    • once_cell to 1.18.0.
  • Updated cargo.lock dependencies via cargo update.

0.12.0 (2023/05/30)

This version introduces a new Apache directive: WasmMapCGIFileNames. It enables/disables the mapping of SCRIPT_FILENAME based on the different WasmMapDir instances when WasmEnableCGI is enabled.

In addition, it normalizes filename paths for both Windows and Linux styles.

WasmEnableCGI On
WasmMapCGIFileNames On
WasmMapDir /app C:/myapp/htdocs

In the example, SCRIPT_FILENAME will store /app/index.php instead of the host path C:/myapp/htdocs/index.php. Without this setting, we would also need to provide a WasmDir granting access to C:/myapp/htdocs as the Wasm module would be trying to access it (or setting WasmMapDir C:/myapp/htdocs C:/myapp/htdocs).

0.11.3 (2023/05/08)

This release fixes a regression issue introduced in 0.11.2 when opening directories on Windows. It doesn't affect other platforms. The issue is realated to Wasmtime 8.0.1 (see PR #6348), so downgrading to 7.0.1.

libwasm_runtime.so

• Dependencies:
  • Downgrading Wasmtime dependency:
    • wasmtime from 8.0.1 to 7.0.1.
  • Updated cargo.lock dependencies via cargo update.

0.11.2 (2023/05/02)

This is a security update to bump Wasmtime to 8.0.1 given the CVE published (low severity) and addressed in:

• GHSA-ch89-5g45-qwc7 (CVE-2023-30624)

libwasm_runtime.so

• Dependencies:
  • Bump version dependencies:
    • wasmtime to 8.0.1.
    • anyhow to 1.0.71.
  • Updated cargo.lock dependencies via cargo update.

0.11.1 (2023/03/31)

• Fixes #40, where a new thread could not create a new Wasm execution context while another thread was running a Wasm module. This was only measurable if the execution of the Wasm module was long enough in time or if it took longer than expected (i.e.: I/O issues, infinite loop, etc.). Note that CPU-limited Wasm executions are not implemented yet (see #9).

libwasm_runtime.so

• Internal refactoring of execution_ctx.rs to address #40.
• Updated cargo.lock dependencies via cargo update.

0.11.0 (2023/03/27)

• In this version, Wasm modules can now return any output type via stdout, including binaries with non UTF-8 bytes sequences or \0 NULL terminators in the middle.
• Also added some minor improvements for error management and building scripts.

mod_wasm.so

• Support for the new wasm_executionctx_run() signature in the wasm_runtime C-API.
• Better error management when invoking ap_scan_script_header_err_strs().
• Some improvements in build.sh per #36.

libwasm_runtime.so

• Now the Wasm module stdout is modelled as a Vec<u8> instead of a String:
  • This prevents an exception when a module emits a non UTF-8 output.
• New signature for wasm_executionctx_run() in the C-API now requires buffer and length pointers:
  • This allows NULL terminators (\0) in the middle of the output to be managed by C without truncating the string (ie.: requires fwrite() instead of fprintf(), etc.).
• Better clean_all target in Makefile.
• Dependencies:
  • Bump version dependencies:
    • wasmtime to 7.0.0.
    • anyhow to 1.0.70.
  • Updated cargo.lock dependencies via cargo update.

httpd-mod-wasm demo container

• Enabling mod_rewrite.
• Adding /php-hello-slim demo.
• Adding WasmEnv TMPDIR /tmp directive to all PHP-related demos.
• Adding stubs for Drupal and Drupal-Zero demos (still WIP).

0.10.3 (2023/03/08)

This is a security update to bump Wasmtime to 6.0.1 given the two CVE published (one critical) and addressed in:

• GHSA-ff4p-7xrq-q5r8 (CVE-2023-26489)
• GHSA-xm67-587q-r2vw (CVE-2023-27477)

libwasm_runtime.so

• Dependencies:
  • Bump version dependencies:
    • wasmtime to 6.0.1.
    • anyhow to 1.0.69.
    • once_cell to 1.17.1.
  • Updated cargo.lock dependencies via cargo update.

0.10.2 (2023/01/09)

libwasm_runtime.so

• Dependencies:
  • Bump version dependencies:
    • wasmtime to 4.0.0.
      • As a consequence, update code to invoke get_typed_func<Params, Results>() with only two arguments.
    • anyhow to 1.0.66.
    • once_cell to 1.17.0.
  • Updated cargo.lock dependencies via cargo update.

0.10.1 (2022/12/12)

mod_wasm.so

• All logging is now properly route to ap_log_error(), ap_log_perror() and ap_log_rerror().
• Apache-2.0 extended license headers.
• Only C89 comments (/* */).

libwasm_runtime.so

• Dependencies:
  • Bump version dependencies:
    • wasmtime to 3.0.1.
  • Updated cargo.lock dependencies via cargo update.

0.10.0 (2022/11/28)

• In this version, among other improvements, we introduce two major features implementing #6, #7, and #16.

  1. Wasm multi-module support:

     Now you can specify different Wasm modules to be used in different routes. For instance, now it’s possible with one-single Apache instance to load simultaneously the Wasm builds for the PHP and Python interpreters (and any other languages that compile to Wasm now or in the future).

  2. Shared Wasm modules:

     Now you can specify different per-route configurations to the same Wasm module. The Wasm binary is loaded in memory only once, and the different configurations are applied to the Wasm module per-HTTP request. Also, now each Wasm execution owns its own stdout buffer, so there are no interlocks between executions anymore.

  Combining all together, you can now have a more flexible configuration such as:

  <Location /wordpress> 
      SetHandler wasm-handler 
      WasmModule /var/www/modules/php7.4.32.wasm 
      WasmDir    /tmp 
      … 
  </Location> 
  
  <Location /python-app> 
      SetHandler wasm-handler 
      WasmModule /var/www/modules/python3.11.wasm 
      WasmArg    /var/www/python-app/app.py 
      … 
  </Location> 
  
  <Location /python-app2> 
      SetHandler wasm-handler 
      WasmModule /var/www/modules/python3.11.wasm 
      WasmArg    /var/www/python-app2/app2.py 
      … 
  </Location> 

mod_wasm.so

• Removed the WasmRoot directive. Now, WasmModule accepts the full Wasm module filepath.
• Removed legacy code:
  • In previous versions, given the only-one Wasm module limitation, mod_wasm.c implemented a mechanism to reset the WASI context for each HTTP request. This is not needed anymore.
  • Old code inherited from mod_example_hooks.c and not used.

libwasm_runtime.so

• C-API:
  • Reorganized functions and their names to be compliant with the new features and to be more idiomatic (🚨 breaks backwards compatibility 🚨).
  • Removed any kind of logic different from C <---> Rust FFI data transformation.
  • Improved error messages with more information.
• Fixed most suggestions from cargo clippy -- -W clippy::pedantic.
• Dependencies:
  • Bump version dependencies:
    • wasmtime to 3.0.0.
    • once_cell to 1.16.0.
  • New dependency:
    • rand to 0.8.5.
  • Updated cargo.lock dependencies via cargo update.

0.8.0 (2022/11/14)

• Updated documentation.
• Added libxml2-dev as a dependency for building mod_wasm.so.
• Added version check mechanism when building mod_wasm.so. Now it checks libwasm_runtime.so version is compatible and the minimum required.

mod_wasm.so

• Fixed directory hierarchy to be compliant with Apache Server (httpd).

libwasm_runtime.so

• Bump version dependencies:
  • wasmtime to 2.0.2 (and other related Wasmtime crates).

0.7.0 (2022/11/03)

• Added support for sending HTTP Request body into WASI stdin.

0.6.0 (2022/10/26)

• Fixed build for aarm64.

0.5.0 (2022/10/21)

• Bump project version to 0.5.0 since it has been successfully tested with Python and PHP Wasm modules by other developers.

libwasm_runtime.so

• Bump version dependencies:
  • wasmtime to 2.0.0.
  • anyhow to 1.0.66.
  • once_cell to 1.15.0.

0.1.0 (2022/10/04)

• Initial mod_wasm version!