Switch remote deploy to vendored source builds

Move remote deployment to a vendored source bundle built on the target host via Docker so redeploys no longer require local cross-compilation or host Go installation.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/request.go

@@ -0,0 +1,17 @@
+package webview
+
+import (
+	"io"
+	"net/http"
+)
+
+type Request interface {
+	URL() (string, error)
+	Method() (string, error)
+	Header() (http.Header, error)
+	Body() (io.ReadCloser, error)
+
+	Response() ResponseWriter
+
+	Close() error
+}

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/request_darwin.go

@@ -0,0 +1,251 @@
+//go:build darwin
+
+package webview
+
+/*
+#cgo CFLAGS: -x objective-c
+#cgo LDFLAGS: -framework Foundation -framework WebKit
+
+#import <Foundation/Foundation.h>
+#import <WebKit/WebKit.h>
+#include <string.h>
+
+static void URLSchemeTaskRetain(void *wkUrlSchemeTask) {
+	id<WKURLSchemeTask> urlSchemeTask = (id<WKURLSchemeTask>) wkUrlSchemeTask;
+	[urlSchemeTask retain];
+}
+
+static void URLSchemeTaskRelease(void *wkUrlSchemeTask) {
+	id<WKURLSchemeTask> urlSchemeTask = (id<WKURLSchemeTask>) wkUrlSchemeTask;
+	[urlSchemeTask release];
+}
+
+static const char * URLSchemeTaskRequestURL(void *wkUrlSchemeTask) {
+	id<WKURLSchemeTask> urlSchemeTask = (id<WKURLSchemeTask>) wkUrlSchemeTask;
+	@autoreleasepool {
+		return [urlSchemeTask.request.URL.absoluteString UTF8String];
+	}
+}
+
+static const char * URLSchemeTaskRequestMethod(void *wkUrlSchemeTask) {
+	id<WKURLSchemeTask> urlSchemeTask = (id<WKURLSchemeTask>) wkUrlSchemeTask;
+	@autoreleasepool {
+		return [urlSchemeTask.request.HTTPMethod UTF8String];
+	}
+}
+
+static const char * URLSchemeTaskRequestHeadersJSON(void *wkUrlSchemeTask) {
+	id<WKURLSchemeTask> urlSchemeTask = (id<WKURLSchemeTask>) wkUrlSchemeTask;
+	@autoreleasepool {
+		NSData *headerData = [NSJSONSerialization dataWithJSONObject: urlSchemeTask.request.allHTTPHeaderFields options:0 error: nil];
+		if (!headerData) {
+			return nil;
+		}
+
+		NSString* headerString = [[[NSString alloc] initWithData:headerData encoding:NSUTF8StringEncoding] autorelease];
+		const char * headerJSON = [headerString UTF8String];
+
+		return strdup(headerJSON);
+	}
+}
+
+static bool URLSchemeTaskRequestBodyBytes(void *wkUrlSchemeTask, const void **body, int *bodyLen) {
+	id<WKURLSchemeTask> urlSchemeTask = (id<WKURLSchemeTask>) wkUrlSchemeTask;
+	@autoreleasepool {
+		if (!urlSchemeTask.request.HTTPBody) {
+			return false;
+		}
+
+		*body = urlSchemeTask.request.HTTPBody.bytes;
+		*bodyLen = urlSchemeTask.request.HTTPBody.length;
+		return true;
+	}
+}
+
+static bool URLSchemeTaskRequestBodyStreamOpen(void *wkUrlSchemeTask) {
+	id<WKURLSchemeTask> urlSchemeTask = (id<WKURLSchemeTask>) wkUrlSchemeTask;
+	@autoreleasepool {
+		if (!urlSchemeTask.request.HTTPBodyStream) {
+			return false;
+		}
+
+		[urlSchemeTask.request.HTTPBodyStream open];
+		return true;
+	}
+}
+
+static void URLSchemeTaskRequestBodyStreamClose(void *wkUrlSchemeTask) {
+	id<WKURLSchemeTask> urlSchemeTask = (id<WKURLSchemeTask>) wkUrlSchemeTask;
+	@autoreleasepool {
+		if (!urlSchemeTask.request.HTTPBodyStream) {
+			return;
+		}
+
+		[urlSchemeTask.request.HTTPBodyStream close];
+	}
+}
+
+static int URLSchemeTaskRequestBodyStreamRead(void *wkUrlSchemeTask, void *buf, int bufLen) {
+	id<WKURLSchemeTask> urlSchemeTask = (id<WKURLSchemeTask>) wkUrlSchemeTask;
+
+	@autoreleasepool {
+		NSInputStream *stream = urlSchemeTask.request.HTTPBodyStream;
+		if (!stream) {
+			return -2;
+		}
+
+		NSStreamStatus status = stream.streamStatus;
+		if (status == NSStreamStatusAtEnd || !stream.hasBytesAvailable) {
+			return 0;
+		} else if (status != NSStreamStatusOpen) {
+			return -3;
+		}
+
+		return [stream read:buf maxLength:bufLen];
+	}
+}
+*/
+import "C"
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"unsafe"
+)
+
+// NewRequest creates as new WebViewRequest based on a pointer to an `id<WKURLSchemeTask>`
+func NewRequest(wkURLSchemeTask unsafe.Pointer) Request {
+	C.URLSchemeTaskRetain(wkURLSchemeTask)
+	return newRequestFinalizer(&request{task: wkURLSchemeTask})
+}
+
+var _ Request = &request{}
+
+type request struct {
+	task unsafe.Pointer
+
+	header http.Header
+	body   io.ReadCloser
+	rw     *responseWriter
+}
+
+func (r *request) URL() (string, error) {
+	return C.GoString(C.URLSchemeTaskRequestURL(r.task)), nil
+}
+
+func (r *request) Method() (string, error) {
+	return C.GoString(C.URLSchemeTaskRequestMethod(r.task)), nil
+}
+
+func (r *request) Header() (http.Header, error) {
+	if r.header != nil {
+		return r.header, nil
+	}
+
+	header := http.Header{}
+	if cHeaders := C.URLSchemeTaskRequestHeadersJSON(r.task); cHeaders != nil {
+		if headers := C.GoString(cHeaders); headers != "" {
+			var h map[string]string
+			if err := json.Unmarshal([]byte(headers), &h); err != nil {
+				return nil, fmt.Errorf("unable to unmarshal request headers: %s", err)
+			}
+
+			for k, v := range h {
+				header.Add(k, v)
+			}
+		}
+		C.free(unsafe.Pointer(cHeaders))
+	}
+	r.header = header
+	return header, nil
+}
+
+func (r *request) Body() (io.ReadCloser, error) {
+	if r.body != nil {
+		return r.body, nil
+	}
+
+	var body unsafe.Pointer
+	var bodyLen C.int
+	if C.URLSchemeTaskRequestBodyBytes(r.task, &body, &bodyLen) {
+		if body != nil && bodyLen > 0 {
+			r.body = io.NopCloser(bytes.NewReader(C.GoBytes(body, bodyLen)))
+		} else {
+			r.body = http.NoBody
+		}
+	} else if C.URLSchemeTaskRequestBodyStreamOpen(r.task) {
+		r.body = &requestBodyStreamReader{task: r.task}
+	}
+
+	return r.body, nil
+}
+
+func (r *request) Response() ResponseWriter {
+	if r.rw != nil {
+		return r.rw
+	}
+
+	r.rw = &responseWriter{r: r}
+	return r.rw
+}
+
+func (r *request) Close() error {
+	var err error
+	if r.body != nil {
+		err = r.body.Close()
+	}
+	err = r.Response().Finish()
+	if err != nil {
+		return err
+	}
+	C.URLSchemeTaskRelease(r.task)
+	return err
+}
+
+var _ io.ReadCloser = &requestBodyStreamReader{}
+
+type requestBodyStreamReader struct {
+	task   unsafe.Pointer
+	closed bool
+}
+
+// Read implements io.Reader
+func (r *requestBodyStreamReader) Read(p []byte) (n int, err error) {
+	var content unsafe.Pointer
+	var contentLen int
+	if p != nil {
+		content = unsafe.Pointer(&p[0])
+		contentLen = len(p)
+	}
+
+	res := C.URLSchemeTaskRequestBodyStreamRead(r.task, content, C.int(contentLen))
+	if res > 0 {
+		return int(res), nil
+	}
+
+	switch res {
+	case 0:
+		return 0, io.EOF
+	case -1:
+		return 0, fmt.Errorf("body: stream error")
+	case -2:
+		return 0, fmt.Errorf("body: no stream defined")
+	case -3:
+		return 0, io.ErrClosedPipe
+	default:
+		return 0, fmt.Errorf("body: unknown error %d", res)
+	}
+}
+
+func (r *requestBodyStreamReader) Close() error {
+	if r.closed {
+		return nil
+	}
+	r.closed = true
+
+	C.URLSchemeTaskRequestBodyStreamClose(r.task)
+	return nil
+}

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/request_finalizer.go

@@ -0,0 +1,40 @@
+package webview
+
+import (
+	"runtime"
+	"sync/atomic"
+)
+
+var _ Request = &requestFinalizer{}
+
+type requestFinalizer struct {
+	Request
+	closed int32
+}
+
+// newRequestFinalizer returns a request with a runtime finalizer to make sure it will be closed from the finalizer
+// if it has not been already closed.
+// It also makes sure Close() of the wrapping request is only called once.
+func newRequestFinalizer(r Request) Request {
+	rf := &requestFinalizer{Request: r}
+	// Make sure to async release since it might block the finalizer goroutine for a longer period
+	runtime.SetFinalizer(rf, func(obj *requestFinalizer) { rf.close(true) })
+	return rf
+}
+
+func (r *requestFinalizer) Close() error {
+	return r.close(false)
+}
+
+func (r *requestFinalizer) close(asyncRelease bool) error {
+	if atomic.CompareAndSwapInt32(&r.closed, 0, 1) {
+		runtime.SetFinalizer(r, nil)
+		if asyncRelease {
+			go r.Request.Close()
+			return nil
+		} else {
+			return r.Request.Close()
+		}
+	}
+	return nil
+}

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/request_linux.go

@@ -0,0 +1,85 @@
+//go:build linux
+// +build linux
+
+package webview
+
+/*
+#cgo linux pkg-config: gtk+-3.0 gio-unix-2.0
+#cgo !webkit2_41 pkg-config: webkit2gtk-4.0
+#cgo webkit2_41 pkg-config: webkit2gtk-4.1
+
+#include "gtk/gtk.h"
+#include "webkit2/webkit2.h"
+*/
+import "C"
+
+import (
+	"io"
+	"net/http"
+	"unsafe"
+)
+
+// NewRequest creates as new WebViewRequest based on a pointer to an `WebKitURISchemeRequest`
+func NewRequest(webKitURISchemeRequest unsafe.Pointer) Request {
+	webkitReq := (*C.WebKitURISchemeRequest)(webKitURISchemeRequest)
+	C.g_object_ref(C.gpointer(webkitReq))
+
+	req := &request{req: webkitReq}
+	return newRequestFinalizer(req)
+}
+
+var _ Request = &request{}
+
+type request struct {
+	req *C.WebKitURISchemeRequest
+
+	header http.Header
+	body   io.ReadCloser
+	rw     *responseWriter
+}
+
+func (r *request) URL() (string, error) {
+	return C.GoString(C.webkit_uri_scheme_request_get_uri(r.req)), nil
+}
+
+func (r *request) Method() (string, error) {
+	return webkit_uri_scheme_request_get_http_method(r.req), nil
+}
+
+func (r *request) Header() (http.Header, error) {
+	if r.header != nil {
+		return r.header, nil
+	}
+
+	r.header = webkit_uri_scheme_request_get_http_headers(r.req)
+	return r.header, nil
+}
+
+func (r *request) Body() (io.ReadCloser, error) {
+	if r.body != nil {
+		return r.body, nil
+	}
+
+	r.body = webkit_uri_scheme_request_get_http_body(r.req)
+
+	return r.body, nil
+}
+
+func (r *request) Response() ResponseWriter {
+	if r.rw != nil {
+		return r.rw
+	}
+
+	r.rw = &responseWriter{req: r.req}
+	return r.rw
+}
+
+func (r *request) Close() error {
+	var err error
+	if r.body != nil {
+		err = r.body.Close()
+	}
+	r.Response().Finish()
+	C.g_object_unref(C.gpointer(r.req))
+	return err
+}

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/request_windows.go

@@ -0,0 +1,217 @@
+//go:build windows
+// +build windows
+
+package webview
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/wailsapp/go-webview2/pkg/edge"
+)
+
+// NewRequest creates as new WebViewRequest for chromium. This Method must be called from the Main-Thread!
+func NewRequest(env *edge.ICoreWebView2Environment, args *edge.ICoreWebView2WebResourceRequestedEventArgs, invokeSync func(fn func())) (Request, error) {
+	req, err := args.GetRequest()
+	if err != nil {
+		return nil, fmt.Errorf("GetRequest failed: %s", err)
+	}
+	defer req.Release()
+
+	r := &request{
+		invokeSync: invokeSync,
+	}
+
+	code := http.StatusInternalServerError
+	r.response, err = env.CreateWebResourceResponse(nil, code, http.StatusText(code), "")
+	if err != nil {
+		return nil, fmt.Errorf("CreateWebResourceResponse failed: %s", err)
+	}
+
+	if err := args.PutResponse(r.response); err != nil {
+		r.finishResponse()
+		return nil, fmt.Errorf("PutResponse failed: %s", err)
+	}
+
+	r.deferral, err = args.GetDeferral()
+	if err != nil {
+		r.finishResponse()
+		return nil, fmt.Errorf("GetDeferral failed: %s", err)
+	}
+
+	r.url, r.urlErr = req.GetUri()
+	r.method, r.methodErr = req.GetMethod()
+	r.header, r.headerErr = getHeaders(req)
+
+	if content, err := req.GetContent(); err != nil {
+		r.bodyErr = err
+	} else if content != nil {
+		// It is safe to access Content from another Thread: https://learn.microsoft.com/en-us/microsoft-edge/webview2/concepts/threading-model#thread-safety
+		r.body = &iStreamReleaseCloser{stream: content}
+	}
+
+	return r, nil
+}
+
+var _ Request = &request{}
+
+type request struct {
+	response *edge.ICoreWebView2WebResourceResponse
+	deferral *edge.ICoreWebView2Deferral
+
+	url    string
+	urlErr error
+
+	method    string
+	methodErr error
+
+	header    http.Header
+	headerErr error
+
+	body    io.ReadCloser
+	bodyErr error
+	rw      *responseWriter
+
+	invokeSync func(fn func())
+}
+
+func (r *request) URL() (string, error) {
+	return r.url, r.urlErr
+}
+
+func (r *request) Method() (string, error) {
+	return r.method, r.methodErr
+}
+
+func (r *request) Header() (http.Header, error) {
+	return r.header, r.headerErr
+}
+
+func (r *request) Body() (io.ReadCloser, error) {
+	return r.body, r.bodyErr
+}
+
+func (r *request) Response() ResponseWriter {
+	if r.rw != nil {
+		return r.rw
+	}
+
+	r.rw = &responseWriter{req: r}
+	return r.rw
+}
+
+func (r *request) Close() error {
+	var errs []error
+	if r.body != nil {
+		if err := r.body.Close(); err != nil {
+			errs = append(errs, err)
+		}
+		r.body = nil
+	}
+
+	if err := r.Response().Finish(); err != nil {
+		errs = append(errs, err)
+	}
+
+	return combineErrs(errs)
+}
+
+// finishResponse must be called on the main-thread
+func (r *request) finishResponse() error {
+	var errs []error
+	if r.response != nil {
+		if err := r.response.Release(); err != nil {
+			errs = append(errs, err)
+		}
+		r.response = nil
+	}
+	if r.deferral != nil {
+		if err := r.deferral.Complete(); err != nil {
+			errs = append(errs, err)
+		}
+
+		if err := r.deferral.Release(); err != nil {
+			errs = append(errs, err)
+		}
+		r.deferral = nil
+	}
+	return combineErrs(errs)
+}
+
+type iStreamReleaseCloser struct {
+	stream *edge.IStream
+	closed bool
+}
+
+func (i *iStreamReleaseCloser) Read(p []byte) (int, error) {
+	if i.closed {
+		return 0, io.ErrClosedPipe
+	}
+	return i.stream.Read(p)
+}
+
+func (i *iStreamReleaseCloser) Close() error {
+	if i.closed {
+		return nil
+	}
+	i.closed = true
+	return i.stream.Release()
+}
+
+func getHeaders(req *edge.ICoreWebView2WebResourceRequest) (http.Header, error) {
+	header := http.Header{}
+	headers, err := req.GetHeaders()
+	if err != nil {
+		return nil, fmt.Errorf("GetHeaders Error: %s", err)
+	}
+	defer headers.Release()
+
+	headersIt, err := headers.GetIterator()
+	if err != nil {
+		return nil, fmt.Errorf("GetIterator Error: %s", err)
+	}
+	defer headersIt.Release()
+
+	for {
+		has, err := headersIt.HasCurrentHeader()
+		if err != nil {
+			return nil, fmt.Errorf("HasCurrentHeader Error: %s", err)
+		}
+		if !has {
+			break
+		}
+
+		name, value, err := headersIt.GetCurrentHeader()
+		if err != nil {
+			return nil, fmt.Errorf("GetCurrentHeader Error: %s", err)
+		}
+
+		header.Set(name, value)
+		if _, err := headersIt.MoveNext(); err != nil {
+			return nil, fmt.Errorf("MoveNext Error: %s", err)
+		}
+	}
+
+	// WebView2 has problems when a request returns a 304 status code and the WebView2 is going to hang for other
+	// requests including IPC calls.
+	// So prevent 304 status codes by removing the headers that are used in combinationwith caching.
+	header.Del("If-Modified-Since")
+	header.Del("If-None-Match")
+	return header, nil
+}
+
+func combineErrs(errs []error) error {
+	// TODO use Go1.20 errors.Join
+	if len(errs) == 0 {
+		return nil
+	}
+
+	errStrings := make([]string, len(errs))
+	for i, err := range errs {
+		errStrings[i] = err.Error()
+	}
+
+	return fmt.Errorf(strings.Join(errStrings, "\n"))
+}

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/responsewriter.go

@@ -0,0 +1,25 @@
+package webview
+
+import (
+	"errors"
+	"net/http"
+)
+
+const (
+	HeaderContentLength = "Content-Length"
+	HeaderContentType   = "Content-Type"
+)
+
+var (
+	errRequestStopped   = errors.New("request has been stopped")
+	errResponseFinished = errors.New("response has been finished")
+)
+
+// A ResponseWriter interface is used by an HTTP handler to
+// construct an HTTP response for the WebView.
+type ResponseWriter interface {
+	http.ResponseWriter
+
+	// Finish the response and flush all data. A Finish after the request has already been finished has no effect.
+	Finish() error
+}

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/responsewriter_darwin.go

@@ -0,0 +1,164 @@
+//go:build darwin
+
+package webview
+
+/*
+#cgo CFLAGS: -x objective-c
+#cgo LDFLAGS: -framework Foundation -framework WebKit
+
+#import <Foundation/Foundation.h>
+#import <WebKit/WebKit.h>
+
+typedef void (^schemeTaskCaller)(id<WKURLSchemeTask>);
+
+static bool urlSchemeTaskCall(void *wkUrlSchemeTask, schemeTaskCaller fn) {
+	id<WKURLSchemeTask> urlSchemeTask = (id<WKURLSchemeTask>) wkUrlSchemeTask;
+    if (urlSchemeTask == nil) {
+        return false;
+    }
+
+	@autoreleasepool {
+		@try {
+			fn(urlSchemeTask);
+		} @catch (NSException *exception) {
+			// This is very bad to detect a stopped schemeTask this should be implemented in a better way
+			// But it seems to be very tricky to not deadlock when keeping a lock curing executing fn()
+			// It seems like those call switch the thread back to the main thread and then deadlocks when they reentrant want
+			// to get the lock again to start another request or stop it.
+			if ([exception.reason isEqualToString: @"This task has already been stopped"]) {
+				return false;
+			}
+
+			@throw exception;
+		}
+
+		return true;
+	}
+}
+
+static bool URLSchemeTaskDidReceiveData(void *wkUrlSchemeTask, void* data, int datalength) {
+	return urlSchemeTaskCall(
+		wkUrlSchemeTask,
+		^(id<WKURLSchemeTask> urlSchemeTask) {
+			NSData *nsdata = [NSData dataWithBytes:data length:datalength];
+			[urlSchemeTask didReceiveData:nsdata];
+    	});
+}
+
+static bool URLSchemeTaskDidFinish(void *wkUrlSchemeTask) {
+	return urlSchemeTaskCall(
+		wkUrlSchemeTask,
+		^(id<WKURLSchemeTask> urlSchemeTask) {
+			[urlSchemeTask didFinish];
+    	});
+}
+
+static bool URLSchemeTaskDidReceiveResponse(void *wkUrlSchemeTask, int statusCode, void *headersString, int headersStringLength) {
+	return urlSchemeTaskCall(
+		wkUrlSchemeTask,
+		^(id<WKURLSchemeTask> urlSchemeTask) {
+			NSData *nsHeadersJSON = [NSData dataWithBytes:headersString length:headersStringLength];
+			NSDictionary *headerFields = [NSJSONSerialization JSONObjectWithData:nsHeadersJSON options: NSJSONReadingMutableContainers error: nil];
+        	NSHTTPURLResponse *response = [[[NSHTTPURLResponse alloc] initWithURL:urlSchemeTask.request.URL statusCode:statusCode HTTPVersion:@"HTTP/1.1" headerFields:headerFields] autorelease];
+
+			[urlSchemeTask didReceiveResponse:response];
+    	});
+}
+*/
+import "C"
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"unsafe"
+)
+
+var _ ResponseWriter = &responseWriter{}
+
+type responseWriter struct {
+	r *request
+
+	header      http.Header
+	wroteHeader bool
+
+	finished bool
+}
+
+func (rw *responseWriter) Header() http.Header {
+	if rw.header == nil {
+		rw.header = http.Header{}
+	}
+	return rw.header
+}
+
+func (rw *responseWriter) Write(buf []byte) (int, error) {
+	if rw.finished {
+		return 0, errResponseFinished
+	}
+
+	rw.WriteHeader(http.StatusOK)
+
+	var contentLen int
+	if buf != nil {
+		contentLen = len(buf)
+	}
+
+	if contentLen > 0 {
+		// Create a C array to hold the data
+		cBuf := C.malloc(C.size_t(contentLen))
+		if cBuf == nil {
+			return 0, fmt.Errorf("memory allocation failed for %d bytes", contentLen)
+		}
+		defer C.free(cBuf)
+
+		// Copy the Go slice to the C array
+		C.memcpy(cBuf, unsafe.Pointer(&buf[0]), C.size_t(contentLen))
+
+		if !C.URLSchemeTaskDidReceiveData(rw.r.task, cBuf, C.int(contentLen)) {
+			return 0, errRequestStopped
+		}
+	} else {
+		if !C.URLSchemeTaskDidReceiveData(rw.r.task, nil, 0) {
+			return 0, errRequestStopped
+		}
+	}
+
+	return contentLen, nil
+}
+
+func (rw *responseWriter) WriteHeader(code int) {
+	if rw.wroteHeader || rw.finished {
+		return
+	}
+	rw.wroteHeader = true
+
+	header := map[string]string{}
+	for k := range rw.Header() {
+		header[k] = rw.Header().Get(k)
+	}
+	headerData, _ := json.Marshal(header)
+
+	var headers unsafe.Pointer
+	var headersLen int
+	if len(headerData) != 0 {
+		headers = unsafe.Pointer(&headerData[0])
+		headersLen = len(headerData)
+	}
+
+	C.URLSchemeTaskDidReceiveResponse(rw.r.task, C.int(code), headers, C.int(headersLen))
+}
+
+func (rw *responseWriter) Finish() error {
+	if !rw.wroteHeader {
+		rw.WriteHeader(http.StatusNotImplemented)
+	}
+
+	if rw.finished {
+		return nil
+	}
+	rw.finished = true
+
+	C.URLSchemeTaskDidFinish(rw.r.task)
+	return nil
+}

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/responsewriter_linux.go

@@ -0,0 +1,132 @@
+//go:build linux
+// +build linux
+
+package webview
+
+/*
+#cgo linux pkg-config: gtk+-3.0 gio-unix-2.0
+#cgo !webkit2_41 pkg-config: webkit2gtk-4.0
+#cgo webkit2_41 pkg-config: webkit2gtk-4.1
+
+#include "gtk/gtk.h"
+#include "webkit2/webkit2.h"
+#include "gio/gunixinputstream.h"
+
+*/
+import "C"
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"strconv"
+	"syscall"
+	"unsafe"
+)
+
+type responseWriter struct {
+	req *C.WebKitURISchemeRequest
+
+	header      http.Header
+	wroteHeader bool
+	finished    bool
+
+	w    io.WriteCloser
+	wErr error
+}
+
+func (rw *responseWriter) Header() http.Header {
+	if rw.header == nil {
+		rw.header = http.Header{}
+	}
+	return rw.header
+}
+
+func (rw *responseWriter) Write(buf []byte) (int, error) {
+	if rw.finished {
+		return 0, errResponseFinished
+	}
+
+	rw.WriteHeader(http.StatusOK)
+	if rw.wErr != nil {
+		return 0, rw.wErr
+	}
+	return rw.w.Write(buf)
+}
+
+func (rw *responseWriter) WriteHeader(code int) {
+	if rw.wroteHeader || rw.finished {
+		return
+	}
+	rw.wroteHeader = true
+
+	contentLength := int64(-1)
+	if sLen := rw.Header().Get(HeaderContentLength); sLen != "" {
+		if pLen, _ := strconv.ParseInt(sLen, 10, 64); pLen > 0 {
+			contentLength = pLen
+		}
+	}
+
+	// We can't use os.Pipe here, because that returns files with a finalizer for closing the FD. But the control over the
+	// read FD is given to the InputStream and will be closed there.
+	// Furthermore we especially don't want to have the FD_CLOEXEC
+	rFD, w, err := pipe()
+	if err != nil {
+		rw.finishWithError(http.StatusInternalServerError, fmt.Errorf("unable to open pipe: %s", err))
+		return
+	}
+	rw.w = w
+
+	stream := C.g_unix_input_stream_new(C.int(rFD), C.gboolean(1))
+	defer C.g_object_unref(C.gpointer(stream))
+
+	if err := webkit_uri_scheme_request_finish(rw.req, code, rw.Header(), stream, contentLength); err != nil {
+		rw.finishWithError(http.StatusInternalServerError, fmt.Errorf("unable to finish request: %s", err))
+		return
+	}
+}
+
+func (rw *responseWriter) Finish() error {
+	if !rw.wroteHeader {
+		rw.WriteHeader(http.StatusNotImplemented)
+	}
+
+	if rw.finished {
+		return nil
+	}
+	rw.finished = true
+	if rw.w != nil {
+		rw.w.Close()
+	}
+	return nil
+}
+
+func (rw *responseWriter) finishWithError(code int, err error) {
+	if rw.w != nil {
+		rw.w.Close()
+		rw.w = &nopCloser{io.Discard}
+	}
+	rw.wErr = err
+
+	msg := C.CString(err.Error())
+	gerr := C.g_error_new_literal(C.g_quark_from_string(msg), C.int(code), msg)
+	C.webkit_uri_scheme_request_finish_error(rw.req, gerr)
+	C.g_error_free(gerr)
+	C.free(unsafe.Pointer(msg))
+}
+
+type nopCloser struct {
+	io.Writer
+}
+
+func (nopCloser) Close() error { return nil }
+
+func pipe() (r int, w *os.File, err error) {
+	var p [2]int
+	e := syscall.Pipe2(p[0:], 0)
+	if e != nil {
+		return 0, nil, fmt.Errorf("pipe2: %s", e)
+	}
+
+	return p[0], os.NewFile(uintptr(p[1]), "|1"), nil
+}

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/responsewriter_windows.go

@@ -0,0 +1,105 @@
+//go:build windows
+// +build windows
+
+package webview
+
+import (
+	"bytes"
+	"fmt"
+	"net/http"
+	"strings"
+)
+
+var _ http.ResponseWriter = &responseWriter{}
+
+type responseWriter struct {
+	req *request
+
+	header      http.Header
+	wroteHeader bool
+	code        int
+	body        *bytes.Buffer
+
+	finished bool
+}
+
+func (rw *responseWriter) Header() http.Header {
+	if rw.header == nil {
+		rw.header = http.Header{}
+	}
+	return rw.header
+}
+
+func (rw *responseWriter) Write(buf []byte) (int, error) {
+	if rw.finished {
+		return 0, errResponseFinished
+	}
+
+	rw.WriteHeader(http.StatusOK)
+
+	return rw.body.Write(buf)
+}
+
+func (rw *responseWriter) WriteHeader(code int) {
+	if rw.wroteHeader || rw.finished {
+		return
+	}
+	rw.wroteHeader = true
+
+	if rw.body == nil {
+		rw.body = &bytes.Buffer{}
+	}
+
+	rw.code = code
+}
+
+func (rw *responseWriter) Finish() error {
+	if !rw.wroteHeader {
+		rw.WriteHeader(http.StatusNotImplemented)
+	}
+
+	if rw.finished {
+		return nil
+	}
+	rw.finished = true
+
+	var errs []error
+
+	code := rw.code
+	if code == http.StatusNotModified {
+		// WebView2 has problems when a request returns a 304 status code and the WebView2 is going to hang for other
+		// requests including IPC calls.
+		errs = append(errs, fmt.Errorf("AssetServer returned 304 - StatusNotModified which are going to hang WebView2, changed code to 505 - StatusInternalServerError"))
+		code = http.StatusInternalServerError
+	}
+
+	rw.req.invokeSync(func() {
+		resp := rw.req.response
+
+		hdrs, err := resp.GetHeaders()
+		if err != nil {
+			errs = append(errs, fmt.Errorf("Resp.GetHeaders failed: %s", err))
+		} else {
+			for k, v := range rw.header {
+				if err := hdrs.AppendHeader(k, strings.Join(v, ",")); err != nil {
+					errs = append(errs, fmt.Errorf("Resp.AppendHeader failed: %s", err))
+				}
+			}
+			hdrs.Release()
+		}
+
+		if err := resp.PutStatusCode(code); err != nil {
+			errs = append(errs, fmt.Errorf("Resp.PutStatusCode failed: %s", err))
+		}
+
+		if err := resp.PutByteContent(rw.body.Bytes()); err != nil {
+			errs = append(errs, fmt.Errorf("Resp.PutByteContent failed: %s", err))
+		}
+
+		if err := rw.req.finishResponse(); err != nil {
+			errs = append(errs, fmt.Errorf("Resp.finishResponse failed: %s", err))
+		}
+	})
+
+	return combineErrs(errs)
+}

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/webkit2_36+.go

@@ -0,0 +1,71 @@
+//go:build linux && (webkit2_36 || webkit2_40 || webkit2_41 )
+
+package webview
+
+/*
+#cgo linux pkg-config: gtk+-3.0 
+#cgo !webkit2_41 pkg-config: webkit2gtk-4.0 libsoup-2.4
+#cgo webkit2_41 pkg-config: webkit2gtk-4.1 libsoup-3.0
+
+#include "gtk/gtk.h"
+#include "webkit2/webkit2.h"
+#include "libsoup/soup.h"
+*/
+import "C"
+
+import (
+	"net/http"
+	"strings"
+	"unsafe"
+)
+
+func webkit_uri_scheme_request_get_http_method(req *C.WebKitURISchemeRequest) string {
+	method := C.GoString(C.webkit_uri_scheme_request_get_http_method(req))
+	return strings.ToUpper(method)
+}
+
+func webkit_uri_scheme_request_get_http_headers(req *C.WebKitURISchemeRequest) http.Header {
+	hdrs := C.webkit_uri_scheme_request_get_http_headers(req)
+
+	var iter C.SoupMessageHeadersIter
+	C.soup_message_headers_iter_init(&iter, hdrs)
+
+	var name *C.char
+	var value *C.char
+
+	h := http.Header{}
+	for C.soup_message_headers_iter_next(&iter, &name, &value) != 0 {
+		h.Add(C.GoString(name), C.GoString(value))
+	}
+
+	return h
+}
+
+func webkit_uri_scheme_request_finish(req *C.WebKitURISchemeRequest, code int, header http.Header, stream *C.GInputStream, streamLength int64) error {
+	resp := C.webkit_uri_scheme_response_new(stream, C.gint64(streamLength))
+	defer C.g_object_unref(C.gpointer(resp))
+
+	cReason := C.CString(http.StatusText(code))
+	C.webkit_uri_scheme_response_set_status(resp, C.guint(code), cReason)
+	C.free(unsafe.Pointer(cReason))
+
+	cMimeType := C.CString(header.Get(HeaderContentType))
+	C.webkit_uri_scheme_response_set_content_type(resp, cMimeType)
+	C.free(unsafe.Pointer(cMimeType))
+
+	hdrs := C.soup_message_headers_new(C.SOUP_MESSAGE_HEADERS_RESPONSE)
+	for name, values := range header {
+		cName := C.CString(name)
+		for _, value := range values {
+			cValue := C.CString(value)
+			C.soup_message_headers_append(hdrs, cName, cValue)
+			C.free(unsafe.Pointer(cValue))
+		}
+		C.free(unsafe.Pointer(cName))
+	}
+
+	C.webkit_uri_scheme_response_set_http_headers(resp, hdrs)
+
+	C.webkit_uri_scheme_request_finish_with_response(req, resp)
+	return nil
+}

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/webkit2_36.go

@@ -0,0 +1,21 @@
+//go:build linux && webkit2_36
+
+package webview
+
+/*
+#cgo linux pkg-config: webkit2gtk-4.0
+
+#include "webkit2/webkit2.h"
+*/
+import "C"
+
+import (
+	"io"
+	"net/http"
+)
+
+const Webkit2MinMinorVersion = 36
+
+func webkit_uri_scheme_request_get_http_body(_ *C.WebKitURISchemeRequest) io.ReadCloser {
+	return http.NoBody
+}

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/webkit2_40+.go

@@ -0,0 +1,85 @@
+//go:build linux && (webkit2_40 || webkit2_41)
+
+package webview
+
+/*
+#cgo linux pkg-config: gtk+-3.0 gio-unix-2.0
+#cgo !webkit2_41 pkg-config: webkit2gtk-4.0
+#cgo webkit2_41 pkg-config: webkit2gtk-4.1
+
+#include "gtk/gtk.h"
+#include "webkit2/webkit2.h"
+#include "gio/gunixinputstream.h"
+*/
+import "C"
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"unsafe"
+)
+
+func webkit_uri_scheme_request_get_http_body(req *C.WebKitURISchemeRequest) io.ReadCloser {
+	stream := C.webkit_uri_scheme_request_get_http_body(req)
+	if stream == nil {
+		return http.NoBody
+	}
+	return &webkitRequestBody{stream: stream}
+}
+
+type webkitRequestBody struct {
+	stream *C.GInputStream
+	closed bool
+}
+
+// Read implements io.Reader
+func (r *webkitRequestBody) Read(p []byte) (int, error) {
+	if r.closed {
+		return 0, io.ErrClosedPipe
+	}
+
+	var content unsafe.Pointer
+	var contentLen int
+	if p != nil {
+		content = unsafe.Pointer(&p[0])
+		contentLen = len(p)
+	}
+
+	var n C.gsize
+	var gErr *C.GError
+	res := C.g_input_stream_read_all(r.stream, content, C.gsize(contentLen), &n, nil, &gErr)
+	if res == 0 {
+		return 0, formatGError("stream read failed", gErr)
+	} else if n == 0 {
+		return 0, io.EOF
+	}
+	return int(n), nil
+}
+
+func (r *webkitRequestBody) Close() error {
+	if r.closed {
+		return nil
+	}
+	r.closed = true
+
+	// https://docs.gtk.org/gio/method.InputStream.close.html
+	// Streams will be automatically closed when the last reference is dropped, but you might want to call this function
+	// to make sure resources are released as early as possible.
+	var err error
+	var gErr *C.GError
+	if C.g_input_stream_close(r.stream, nil, &gErr) == 0 {
+		err = formatGError("stream close failed", gErr)
+	}
+	C.g_object_unref(C.gpointer(r.stream))
+	r.stream = nil
+	return err
+}
+
+func formatGError(msg string, gErr *C.GError, args ...any) error {
+	if gErr != nil && gErr.message != nil {
+		msg += ": " + C.GoString(gErr.message)
+		C.g_error_free(gErr)
+	}
+	return fmt.Errorf(msg, args...)
+}

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/webkit2_40.go

@@ -0,0 +1,5 @@
+//go:build linux && webkit2_40
+
+package webview
+
+const Webkit2MinMinorVersion = 40

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/webkit2_41.go

@@ -0,0 +1,5 @@
+//go:build linux && webkit2_41
+
+package webview
+
+const Webkit2MinMinorVersion = 41

vendor/github.com/wailsapp/wails/v2/pkg/assetserver/webview/webkit2_legacy.go

@@ -0,0 +1,48 @@
+//go:build linux && !(webkit2_36 || webkit2_40 || webkit2_41)
+
+package webview
+
+/*
+#cgo linux pkg-config: gtk+-3.0 webkit2gtk-4.0
+
+#include "gtk/gtk.h"
+#include "webkit2/webkit2.h"
+*/
+import "C"
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"unsafe"
+)
+
+const Webkit2MinMinorVersion = 0
+
+func webkit_uri_scheme_request_get_http_method(_ *C.WebKitURISchemeRequest) string {
+	return http.MethodGet
+}
+
+func webkit_uri_scheme_request_get_http_headers(_ *C.WebKitURISchemeRequest) http.Header {
+	// Fake some basic default headers that are needed if e.g. request are being proxied to the an external sever, like
+	// we do in the devserver.
+	h := http.Header{}
+	h.Add("Accept", "*/*")
+	h.Add("User-Agent", "wails.io/605.1.15")
+	return h
+}
+
+func webkit_uri_scheme_request_get_http_body(_ *C.WebKitURISchemeRequest) io.ReadCloser {
+	return http.NoBody
+}
+
+func webkit_uri_scheme_request_finish(req *C.WebKitURISchemeRequest, code int, header http.Header, stream *C.GInputStream, streamLength int64) error {
+	if code != http.StatusOK {
+		return fmt.Errorf("StatusCodes not supported: %d - %s", code, http.StatusText(code))
+	}
+
+	cMimeType := C.CString(header.Get(HeaderContentType))
+	C.webkit_uri_scheme_request_finish(req, stream, C.gint64(streamLength), cMimeType)
+	C.free(unsafe.Pointer(cMimeType))
+	return nil
+}