fix(v3/windows): don't kill the process when WebResourceRequested can't read the request - #6006
fix(v3/windows): don't kill the process when WebResourceRequested can't read the request#6006midagedev wants to merge 2 commits into
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…'t read the request GetRequest can fail at runtime, and can also return S_OK without setting the out pointer under load (wailsapp#1103's crash trace shows the resulting Release on a nil request). Both cases now drop that one request and log, instead of log.Fatal — which exits without even reaching the application's error callback. Same class as the merged wailsapp#5658/wailsapp#5597 runtime-COM-error recoveries; this was the last remaining process-kill in the handler set.
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Included review availability: Your plan provides up to 10 included reviews per hour; 7 remain after this review. WalkthroughThe ChangesWebView2 request recovery
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: ⚪ Minimal · up to This localized change prevents one request-level COM failure from terminating the application, and the intentional nil-error log still identifies the affected failure mode. No actionable merge-blocking risk remains after normal checks and review. Possibly related PRs
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Inline comments:
In `@v3/internal/webview2/pkg/edge/chromium.go`:
- Around line 726-731: Update the WebResourceRequested error handling around the
req nil check to distinguish a non-nil error from a nil request with no error.
Keep the existing error details for failures, but log an explicit message
identifying the nil-request recovery case before returning 0.
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v3/UNRELEASED_CHANGELOG.mdv3/internal/webview2/pkg/edge/chromium.go
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Description
Chromium.WebResourceRequestedcallslog.Fatal(err)whenargs.GetRequest()fails. Once a"*"filter is registered (webview_window_windows.godoes this for asset serving), every request the WebView makes flows through this handler — so one transient COM failure on one request kills the whole application, skipping deferred cleanup, andlog.Fataldoes not even reach the error callback configured viaSetErrorCallback.There is also a second, historically reported failure mode: the COM call can return
S_OKwithout setting the out pointer, soGetRequestreturns(nil, nil)(the wrapper only checks the HRESULT). #1103 reported exactly this under load in the same binding lineage — its crash trace isICoreWebView2WebResourceRequest.Release(0x0), which is whatdefer req.Release()does with a nil request here.Change
Both cases now drop that one request and log, instead of exiting: the WebView continues default handling for the dropped request, which is recoverable; killing the process is not.
Same class as the merged #5658 ("recover from transient runtime COM errors instead of exiting") and #5597 — after those, this
log.Fatalis the last remaining process-kill in this handler set, and the log format matches theirs. Only the error is logged, no request data.Notes for review:
<nil>— that is precisely the [v2, windows] Random panics during processRequest #1103 mode (S_OK with an unset out pointer), so the log line still identifies it.PermissionRequestedabove still routes two runtime failures througherrorCallback; that path at least respectsSetErrorCallback, so it is left out of this single-purpose fix. Happy to follow up on it if wanted.Type of change
How Has This Been Tested?
GOOS=windows go build ./internal/webview2/... ./pkg/application/andgo veton the touched file (clean).GetRequestrequires fault injection the binding does not expose. The defect evidence is [v2, windows] Random panics during processRequest #1103's field crash trace plus the wrapper's HRESULT-only check; the fix is behavior-preserving for every successful request.Summary by CodeRabbit