* feat(v3): add server mode for headless HTTP deployment
Server mode allows Wails applications to run as pure HTTP servers
without native GUI dependencies. Enable with `-tags server` build tag.
Features:
- HTTP server with configurable host/port via ServerOptions
- WAILS_SERVER_HOST and WAILS_SERVER_PORT env var overrides
- WebSocket event broadcasting to connected browsers
- Browser clients represented as BrowserWindow (Window interface)
- Health check endpoint at /health
- Graceful shutdown with configurable timeout
- Docker support with Dockerfile.server template and tasks
Build and run:
wails3 task build:server
wails3 task run:server
wails3 task build:docker
wails3 task run:docker
Documentation at docs/guides/server-build.mdx
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* feat(v3): add server mode for headless HTTP deployment
Server mode allows Wails applications to run as pure HTTP servers
without native GUI dependencies. Enable with `-tags server` build tag.
Features:
- HTTP server with configurable host/port via ServerOptions
- WAILS_SERVER_HOST and WAILS_SERVER_PORT env var overrides
- WebSocket event broadcasting to connected browsers
- Browser clients represented as BrowserWindow (Window interface)
- Health check endpoint at /health
- Graceful shutdown with configurable timeout
- Docker support with Dockerfile.server template and tasks
Build and run:
wails3 task build:server
wails3 task run:server
wails3 task build:docker
wails3 task run:docker
Documentation at docs/guides/server-build.mdx
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* fix: address CodeRabbit review comments
- Fix corrupted test file with embedded terminal output
- Fix module name mismatch in gin-routing (was gin-example)
- Fix replace directive version mismatch in gin-service
- Fix placeholder module name in ios example (was changeme)
- Fix Dockerfile COPY path to work from both build contexts
- Fix bare URL in README (MD034 compliance)
- Fix comment accuracy in getScreens (returns error, not empty slice)
- Remove deprecated docker-compose version field
- Add port documentation in Taskfile template
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* fix: address CodeRabbit review comments
- Add note about healthcheck wget not being available in distroless images
- Add !server build constraint to menu_windows.go and menu_darwin.go
- Downgrade window-visibility-test go.mod from 1.25 to 1.24 to match CI
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
* fix(v3): warm up dialog types in go-json cache to prevent Windows panic
Add FileFilter, OpenFileDialogOptions, SaveFileDialogOptions, and
MessageDialogOptions to the init() warmup to prevent index out of bounds
panic on Windows when these types are first unmarshaled.
Fixes goccy/go-json#474 for Wails internal dialog types.
* fix(v3): revert goccy/go-json to stdlib encoding/json to fix Windows panic
goccy/go-json has a type address calculation bug on Windows that causes
index out of bounds panic when decoding user-defined types for the first time.
This reverts all runtime usages of goccy/go-json back to stdlib encoding/json.
Test and benchmark files are left unchanged.
Partially reverts PR #4843.
* perf(v3): optimize JSON processing and reduce allocations in hot paths
- Switch to goccy/go-json for method binding, events, and HTTP transport
(21-63% faster, 40-60% less memory for method calls)
- Optimize BoundMethod struct layout to reduce padding (144 -> 136 bytes)
- Cache isVariadic flag at registration to avoid reflect call per invocation
- Use stack-allocated buffer for method arguments (<=8 args)
- Optimize result collection to avoid slice allocation for single return values
- Use sync.Map for MIME cache to improve concurrent read performance
- Use buffer pool for HTTP transport request body reading
- Lazily allocate CloseNotify channel in content type sniffer
- Remove debug CSS logging from asset server
- Add comprehensive benchmark tests (build tag: bench)
Performance improvements for BoundMethod.Call:
- SimpleCall: 1290ns -> 930ns (28% faster), 240B -> 80B (67% less memory)
- ComplexCall: 10500ns -> 3900ns (63% faster), 1192B -> 1020B (14% less)
- VariadicCall: 3460ns -> 1600ns (54% faster), 512B -> 289B (44% less)
* perf(v3): add max size limit to buffer pool to prevent memory bloat
Buffers larger than 512KB are not returned to the pool, allowing GC
to reclaim memory after large requests (e.g., base64 encoded images).
* perf(v3): remove mimetype library dependency, saving ~208KB binary size
- Replace github.com/wailsapp/mimetype with expanded extension map + stdlib
- Expand MIME type map from 16 to 50+ common web formats (fonts, audio, video, etc.)
- Add comprehensive test suite validating MIME detection for all web formats
- Use http.DetectContentType as fallback for unknown extensions
- Actual binary size reduction: 1.2MB (11MB -> 9.8MB in test app)
* perf(v3): migrate all runtime code to goccy/go-json
Migrate remaining encoding/json usages to goccy/go-json in:
- pkg/application (android, darwin, ios, single_instance, webview_window)
- pkg/services (kvstore, notifications on all platforms)
- internal/assetserver/webview (request/response handling)
- internal/runtime and internal/capabilities
Note: encoding/json (110KB) remains in binary because:
1. goccy/go-json imports it for interface compatibility (json.Marshaler, etc.)
2. log/slog (stdlib) uses it for JSON output
The performance benefit is in the hot paths which now use the faster library.
* perf(v3): replace gopkg.in/ini.v1 with minimal .desktop file parser
Replace the gopkg.in/ini.v1 dependency with a purpose-built minimal parser
for Linux .desktop files.
The new parser:
- Only extracts the Exec key from [Desktop Entry] section (all we need)
- Follows the Desktop Entry Specification
- Has comprehensive test coverage (40 tests) including:
- All major file managers (Nautilus, Dolphin, Thunar, PCManFM, Caja, Nemo)
- Edge cases (UTF-8, special chars, comments, empty files, etc.)
- Buffer limit handling
Binary size reduction: 45KB (10.22MB -> 10.18MB)
* perf(v3): remove samber/lo from runtime code, saving ~310KB binary size
Replace samber/lo with Go 1.21+ stdlib slices package and minimal internal
helpers in all runtime code paths. This removes 80 transitive dependencies
from the production binary.
Changes:
- Create internal/sliceutil package with Unique and FindMapKey helpers
- Replace lo.Without with slices.DeleteFunc in event handling
- Replace lo.Ternary with inline if/else in Windows code
- Replace lo.Uniq with sliceutil.Unique for feature flags
- Replace lo.FindKey with sliceutil.FindMapKey for method aliases
- Replace lo.Filter with slices.DeleteFunc in event listeners
- Replace lo.Must with inline panic in w32 package
Binary size: 10.18MB -> 9.87MB (~310KB / 3% reduction)
Note: CLI tools still use samber/lo since they don't affect
production binary size. The application_debug.go file also
retains lo usage as it has //go:build !production tag.
* fix: address CodeRabbit review comments
- Use application/x-typescript MIME type (not IANA-registered text/typescript)
- Fix potential panic in mimetype_stdlib_test.go for short MIME strings
- Use cached isVariadic flag in bindings_optimized_bench_test.go
* fix: initialize goccy/go-json decoder early to fix Windows test failure
On Windows, goccy/go-json's type address calculation can fail if the
decoder is first invoked during test execution rather than at init time.
Force early initialization by unmarshaling a []int during package init.
See: https://github.com/goccy/go-json/issues/474
* 📝 Add docstrings to `v3/performance-improvements` (#4844)
* fix: initialize goccy/go-json decoder early to fix Windows test failure
On Windows, goccy/go-json's type address calculation can fail if the
decoder is first invoked during test execution rather than at init time.
Force early initialization by unmarshaling a []int during package init.
See: https://github.com/goccy/go-json/issues/474
* 📝 Add docstrings to `v3/performance-improvements`
Docstrings generation was requested by @leaanthony.
* https://github.com/wailsapp/wails/pull/4843#issuecomment-3703472562
The following files were modified:
* `v3/internal/assetserver/common.go`
* `v3/internal/assetserver/content_type_sniffer.go`
* `v3/internal/assetserver/mimecache.go`
* `v3/internal/fileexplorer/desktopfile.go`
* `v3/internal/fileexplorer/fileexplorer_linux.go`
* `v3/internal/sliceutil/sliceutil.go`
* `v3/pkg/application/application_ios.go`
* `v3/pkg/application/bindings.go`
* `v3/pkg/application/ios_runtime_ios.go`
* `v3/pkg/w32/window.go`
---------
Co-authored-by: Lea Anthony <lea.anthony@gmail.com>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
---------
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
* Add strong event typings
* Make `EmitEvent` take one data argument only
* Add event registration logic
* Report event cancellation to the emitter
* Prevent registration of system events
* Add support for typed event data initialisation
* Binding generation for events
* Tests for event bindings
* Add vite plugin for typed events
* Fix dev command execution order
Co-authored-by: Fabio Massaioli <fabio.massaioli@gmail.com>
* Propagate module path to templates
* Update templates
Co-authored-by: Ian VanSchooten <ian.vanschooten@gmail.com>
* Go mod tidy for examples
* Switch to tsconfig.json for jetbrains IDE support
* Replace jsconfig in example
* Convert vite plugin to typescript
* Downgrade vite for now
The templates all use 5.x
* Remove root plugins dir from npm files
It's now '/dist/plugins'
* Include types for Create
But keep out of the docs
* Assign a type for cancelAll results
* Restore variadic argument in EmitEvent methods
* Support registered events with void data
* Test cases for void alias support
* Support strict mode
* Support custom event hooks
* Update docs
* Update changelog
* Testdata for typed events
* Test data for void alias support
* fix webview_window emit event
* Update changelog.mdx
* Update events
* Fix generator test path normalization for cross-platform compatibility
The generator tests were failing on CI because they compared absolute file paths
in warning messages. These paths differ between development machines and CI environments.
Changes:
- Normalize file paths in warnings to be relative to testcases/ directory
- Handle both Unix and Windows path separators
- Use Unix line endings consistently in test output
- Update all test expectation files to use normalized paths
This ensures tests pass consistently across different environments including
Windows, macOS, Linux, and CI systems.
* Remove stale comment
* Handle errors returned from validation
* Restore variadic argument to Emit (fix bad rebase)
* Event emitters return a boolean
* Don't use `EmitEvent` in docs
Supposedly it's for internal use, according to comment
* Fix event docs (from rebase)
* Ensure all templates specify @wailsio/runtime: "latest"
* Fix Windows test failure due to CRLF line endings
The test was failing on Windows because:
1. Hardcoded "\n" was being used instead of render.Newline when writing
warning logs, causing CRLF vs LF mismatch
2. The render package import was missing
3. .got.log files weren't being skipped when building expected file list
Changes:
- Add render package import
- Use render.Newline instead of hardcoded "\n" for cross-platform compatibility
- Skip .got.log files in test file walker
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Fix template tests by using local runtime package
The template tests were failing because they were installing @wailsio/runtime@latest from npm, which doesn't have the new vite plugin yet. This change packs the local runtime and uses it in template tests instead.
Changes:
- Pack the runtime to a tarball in test_js job
- Upload the runtime package as an artifact
- Download and install the local runtime in template tests before building
- Update cleanup job to delete the runtime package artifact
* Apply suggestion from @leaanthony
* Fix: Install local runtime in frontend directory with correct path
The previous fix wasn't working because:
1. npm install was run in the project root, not in frontend/
2. wails3 build runs npm install again, which would reinstall from npm
Fixed by:
- Using npm pkg set to modify package.json to use file:// protocol
- This ensures subsequent npm install calls use the local tarball
* Fix Vue template syntax conflicts with Go template delimiters
The Vue templates were converted to .tmpl files to support dynamic module
paths, but Vue's template syntax {{ }} conflicts with Go's template syntax.
Fixed by escaping Vue template braces:
- {{ becomes {{"{{"}}
- }} becomes {{"}}"}}
This allows the Go template engine to output the literal {{ }} for Vue to process.
* Fix Vue template escaping and Windows shell compatibility
Two issues fixed:
1. Vue template escaping: Changed from {{"{{"}} to {{ "{{" }}
- The previous syntax caused "missing value for command" error
- Correct Go template syntax uses spaces between delimiters and strings
2. Windows PowerShell compatibility: Added 'shell: bash' to template generation step
- The bash syntax (ls, head, $()) doesn't work in PowerShell
- Git Bash is available on all GitHub runners including Windows
* Fix: test_templates depends on test_js for runtime package artifact
The runtime-package artifact is created in test_js job, not test_go.
Added test_js to the needs array so the artifact is available for download.
* Fix Windows path compatibility for runtime package artifact
Changed from absolute Unix path '/tmp/wails-runtime' to relative path
'wails-runtime-temp' which works cross-platform. Using realpath to
convert to absolute path for file:// URL in npm pkg set command.
* Fix realpath issue on Windows for runtime package
realpath on Windows Git Bash was producing malformed paths with duplicate
drive letters (D:\d\a\...). Replaced with portable solution using pwd
that works correctly across all platforms.
* Use pwd -W on Windows to get native Windows paths
Git Bash's pwd returns Unix-style paths (/d/a/wails/wails) which npm
then incorrectly resolves as D:/d/a/wails/wails. Using pwd -W returns
native Windows paths (D:\a\wails\wails) that npm can handle correctly.
This is the root cause of all the Windows path issues.
* Improve typechecking for Events.Emit()
* [docs] Clarify where `Events` is imported from in each example
* Add docs for runtime Events.Emit()
* Revert to v2-style Events.Emit (name, data)
* Update changelog
---------
Co-authored-by: Fabio Massaioli <fabio.massaioli@gmail.com>
Co-authored-by: Atterpac <Capretta.Michael@gmail.com>
Co-authored-by: Lea Anthony <lea.anthony@gmail.com>
Co-authored-by: Claude <noreply@anthropic.com>
* allow for non-Window WailsEvent listeners
- adds a RegisterListener function on the App struct such
that code can listen for WailsEvent(s) even if it isn't a Window
- rename dispatchEventToWindows -> dispatchEventToListeners
- add all windows and WailsEventListeners to slice before emitting
* Update v3/pkg/application/application.go
---------
Co-authored-by: Lea Anthony <lea.anthony@gmail.com>
* update wml events to be parseable
* [v3] Rename `CustomEvent` to `WailsEvent` to prevent clashing with the standard JS `CustomEvent` object
---------
Co-authored-by: Lea Anthony <lea.anthony@gmail.com>
* Tidy up runtime JS
* Initial implementation of runtime over http
* Update runtime deps. Fix test task.
* Support Clipboard.
Message Processor refactor.
* Add `Window.Screen()`
Clipboard `GetText` -> `Text`
* Support most dialogs
Better JS->Go object mapping
Implement Go->JS callback mechanism
Rename `window.runtime` -> `window.wails` to better reflect the Go API
* Support SaveFile dialog
* Remove go.work
* Tidy up
* Event->CustomEvent to prevent potential clash with native JS Event object
Support Eventing
* Support application calls
* Support logging
* Support named windows
Remove debug info
* Update v3 changes
