[Copilot]

urlsToWatch matching ignores case, but mock and error-response URL matching was case-sensitive. A request that Dev Proxy intercepted could fail to match a mock or error entry that differed only in casing, and then pass through to the origin with no warning.

Changes

• MockResponsePlugin, GraphMockResponsePlugin, GenericRandomErrorPlugin: both URL checks now ignore case. The exact-URL check uses StringComparison.OrdinalIgnoreCase instead of ==, and the wildcard regex uses RegexOptions.IgnoreCase.
• WebSocketMockResponsePlugin: the wildcard regex now uses RegexOptions.IgnoreCase. Its exact-URL match already ignored case.
• Tests: integration tests for MockResponsePlugin and GenericRandomErrorPlugin check that a request to /get matches entries defined as /Get (exact) and /Ge* (wildcard).

Behavior

// urlsToWatch: ["https://api.contoso.com/*"]
{ "request": { "url": "https://api.contoso.com/Users" }, ... }

GET https://api.contoso.com/users now returns the mock. Before this change, the request was intercepted but no mock matched.

Compatibility

Matching is more permissive now. Within each file, entries are still evaluated in order and the first match wins. A mocks or errors file that relies on casing to tell two entries apart will now resolve to whichever of them comes first.

• Fixes Mock and error-response URL matching is case-sensitive while urlsToWatch is case-insensitive #1931

[Copilot]

🟢 Approval recommended

Static review found no blocking issues, and regression tests cover exact and wildcard HTTP matching, though tests were not executed.

No open issues 🎉

What changed in this PR

Aligns mock and error-response URL matching with case-insensitive urlsToWatch behavior, addressing #1931.

Changes:

• Makes exact and wildcard URL matching ignore case across four plugins.
• Adds integration tests for mixed-case exact and wildcard matches.
• Updates transitive dependency lock-file entries.

File	Description
DevProxy/​packages.lock.json	Updates application dependency records.
DevProxy.Proxy.Kestrel/​packages.lock.json	Updates proxy dependency records.
DevProxy.Plugins/​Mocking/​WebSocketMockResponsePlugin.cs	Makes wildcard matching case-insensitive.
DevProxy.Plugins/​Mocking/​MockResponsePlugin.cs	Makes exact and wildcard matching case-insensitive.
DevProxy.Plugins/​Mocking/​GraphMockResponsePlugin.cs	Applies case-insensitive matching to batch requests.
DevProxy.Plugins/​Behavior/​GenericRandomErrorPlugin.cs	Makes error-entry URL matching case-insensitive.
DevProxy.Integration.Tests/​ManipulationAndMockingIntegrationTests.cs	Tests mixed-case mock matching.
DevProxy.Integration.Tests/​BehaviorPluginsIntegrationTests.cs	Tests mixed-case error matching.

_{Review effort: Balanced}