Fixing matching issues in URL plugin #4191
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🥷 Code experts: Jack251970 Jack251970 has most 👩💻 activity in the files. See details
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📝 WalkthroughWalkthroughRefactors URL plugin tests using data-driven approach and updates URL validation logic to support IP-based URLs (IPv6, IPv4, localhost) with expanded scheme recognition. Changes validation from inclusive to opt-in, returning empty results for non-URL inputs. Changes
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~25 minutes Pre-merge checks and finishing touches❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing touches
🧪 Generate unit tests (beta)
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Actionable comments posted: 0
🧹 Nitpick comments (3)
Flow.Launcher.Test/Plugins/UrlPluginTest.cs (2)
10-19: Reflection-based setup is acceptable but consider null check.The reflection approach to set the private
Settingsfield is reasonable for testing. However,settingsFieldcould theoretically be null if the field is renamed or refactored.🔎 Consider adding a guard or assertion
[OneTimeSetUp] public void OneTimeSetup() { var settingsField = typeof(Main).GetField("Settings", BindingFlags.NonPublic | BindingFlags.Static); + Assert.That(settingsField, Is.Not.Null, "Settings field not found - check if field name changed"); settingsField?.SetValue(null, new Settings()); plugin = new Main(); }
57-71: Invalid URL test cases look reasonable; consider adding a few edge cases.Current coverage is good. You may want to add tests for these edge cases if they're relevant:
"http://256.256.256.256"(invalid IPv4 with scheme)"[::1"(unclosed bracket)"http://[::1"(unclosed bracket with scheme)These would help ensure the regex properly rejects malformed inputs.
Plugins/Flow.Launcher.Plugin.Url/Main.cs (1)
118-125:IsURLmethod could be simplified.The method works correctly but has a minor redundancy.
🔎 Simplify the return statement
public bool IsURL(string raw) { raw = raw.ToLower(); - - if (UrlRegex.Match(raw).Value == raw) return true; - - return false; + return UrlRegex.Match(raw).Value == raw; }Additionally, since the regex uses
RegexOptions.IgnoreCase, theToLower()call may be redundant. Consider removing it for minor performance improvement:public bool IsURL(string raw) { - raw = raw.ToLower(); - return UrlRegex.Match(raw).Value == raw; + return UrlRegex.Match(raw).Value.Equals(raw, StringComparison.OrdinalIgnoreCase); }
📜 Review details
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Review profile: CHILL
Plan: Pro
📒 Files selected for processing (2)
Flow.Launcher.Test/Plugins/UrlPluginTest.csPlugins/Flow.Launcher.Plugin.Url/Main.cs
🧰 Additional context used
🧠 Learnings (8)
📚 Learning: 2025-09-04T11:52:29.096Z
Learnt from: jjw24
Repo: Flow-Launcher/Flow.Launcher PR: 3932
File: Flow.Launcher.Core/ExternalPlugins/PluginsManifest.cs:48-55
Timestamp: 2025-09-04T11:52:29.096Z
Learning: In Flow Launcher's PluginsManifest.cs, when dealing with version parsing for the MinimumAppVersion feature, maintainer jjw24 prefers to keep the solution simple rather than implementing comprehensive helper methods for SemVer parsing normalization.
Applied to files:
Plugins/Flow.Launcher.Plugin.Url/Main.csFlow.Launcher.Test/Plugins/UrlPluginTest.cs
📚 Learning: 2025-07-06T12:21:37.947Z
Learnt from: Jack251970
Repo: Flow-Launcher/Flow.Launcher PR: 3572
File: Flow.Launcher/App.xaml.cs:214-216
Timestamp: 2025-07-06T12:21:37.947Z
Learning: In Flow Launcher, the UpdatePluginManifestAsync method in PluginsManifest.cs already has comprehensive internal try-catch handling that logs exceptions and returns false on failure rather than throwing, making external try-catch wrappers unnecessary.
Applied to files:
Plugins/Flow.Launcher.Plugin.Url/Main.cs
📚 Learning: 2025-10-16T10:48:30.573Z
Learnt from: Jack251970
Repo: Flow-Launcher/Flow.Launcher PR: 3854
File: Flow.Launcher/App.xaml.cs:252-275
Timestamp: 2025-10-16T10:48:30.573Z
Learning: In Flow Launcher's App.xaml.cs, the plugin initialization block (lines 252-275) that includes PreStartPluginExecutablePathUpdate, PluginManager.LoadPlugins, PluginManager.InitializePluginsAsync, _mainVM.QueryResults(), and API.SaveAppAllSettings() does not require additional Task.Run wrappers or Dispatcher.InvokeAsync calls according to maintainer Jack251970, as the threading model is already safe as designed.
Applied to files:
Plugins/Flow.Launcher.Plugin.Url/Main.csFlow.Launcher.Test/Plugins/UrlPluginTest.cs
📚 Learning: 2025-07-21T09:19:49.684Z
Learnt from: Jack251970
Repo: Flow-Launcher/Flow.Launcher PR: 3854
File: Flow.Launcher/App.xaml.cs:246-262
Timestamp: 2025-07-21T09:19:49.684Z
Learning: In Flow Launcher's App.xaml.cs, the asynchronous plugin initialization task (containing AbstractPluginEnvironment.PreStartPluginExecutablePathUpdate, PluginManager.LoadPlugins, PluginManager.InitializePluginsAsync, and AutoPluginUpdates) does not require additional try-catch error handling according to maintainer Jack251970, as these operations are designed to handle exceptions internally.
Applied to files:
Plugins/Flow.Launcher.Plugin.Url/Main.cs
📚 Learning: 2025-07-21T09:19:19.012Z
Learnt from: Jack251970
Repo: Flow-Launcher/Flow.Launcher PR: 3854
File: Flow.Launcher.Core/Plugin/PluginManager.cs:280-292
Timestamp: 2025-07-21T09:19:19.012Z
Learning: In Flow Launcher's PluginManager.cs, the post-initialization operations (RegisterResultsUpdatedEvent, UpdatePluginMetadataTranslation, RegisterPluginActionKeywords, DialogJump.InitializeDialogJumpPlugin, and AddPluginToLists) are designed to be exception-safe and do not require additional try-catch error handling according to the maintainer Jack251970.
Applied to files:
Plugins/Flow.Launcher.Plugin.Url/Main.cs
📚 Learning: 2024-11-03T07:40:11.014Z
Learnt from: Yusyuriv
Repo: Flow-Launcher/Flow.Launcher PR: 3057
File: Flow.Launcher.Core/Plugin/JsonRPCPluginSettings.cs:0-0
Timestamp: 2024-11-03T07:40:11.014Z
Learning: In Flow Launcher, when using Windows Forms dialogs (e.g., in `JsonRPCPluginSettings.cs`), path validation is enabled by default in `OpenFileDialog` and `FolderBrowserDialog`, preventing users from selecting invalid paths, but it's possible to opt out of this validation on individual dialogs.
Applied to files:
Plugins/Flow.Launcher.Plugin.Url/Main.cs
📚 Learning: 2025-09-05T11:56:27.267Z
Learnt from: Jack251970
Repo: Flow-Launcher/Flow.Launcher PR: 3593
File: Flow.Launcher/HotkeyControlDialog.xaml:6-6
Timestamp: 2025-09-05T11:56:27.267Z
Learning: In Flow.Launcher's migration to iNKORE.UI.WPF.Modern UI framework, dialog resource keys like PopuBGColor, PopupButtonAreaBGColor, PopupButtonAreaBorderColor, and PopupTextColor are provided by the iNKORE.UI.WPF.Modern framework itself, not defined locally in the codebase theme files.
Applied to files:
Plugins/Flow.Launcher.Plugin.Url/Main.cs
📚 Learning: 2025-07-01T05:46:13.251Z
Learnt from: Jack251970
Repo: Flow-Launcher/Flow.Launcher PR: 3791
File: Flow.Launcher.Core/Plugin/PluginManager.cs:293-295
Timestamp: 2025-07-01T05:46:13.251Z
Learning: In Flow.Launcher.Core/Plugin/PluginManager.cs, when checking if a plugin is modified within the PluginManager class itself, prefer using the internal static PluginModified(string id) method directly rather than going through API.PluginModified() for better performance and architectural design.
Applied to files:
Flow.Launcher.Test/Plugins/UrlPluginTest.cs
🧬 Code graph analysis (1)
Flow.Launcher.Test/Plugins/UrlPluginTest.cs (1)
Plugins/Flow.Launcher.Plugin.Url/Main.cs (2)
Main(10-148)IsURL(118-125)
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Flow.Launcher.Test/Plugins/UrlPluginTest.cs
[warning] 26-26:
google is not a recognized word. (unrecognized-spelling)
[warning] 25-25:
google is not a recognized word. (unrecognized-spelling)
[warning] 26-26:
google is not a recognized word. (unrecognized-spelling)
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🔇 Additional comments (6)
Flow.Launcher.Test/Plugins/UrlPluginTest.cs (1)
21-55: Good coverage of valid URL formats including IPv6 and case variations.The parameterized test cases comprehensively cover:
- Standard HTTP/HTTPS/FTP schemes
- Bare domains and hostnames
- localhost with and without ports
- IPv4 addresses including private ranges (192.168.x.x)
- IPv6 in both bracketed and unbracketed forms
- Case-insensitive matching
Plugins/Flow.Launcher.Plugin.Url/Main.cs (5)
19-34: IPv6 regex patterns are comprehensive but complex.The IPv6 patterns cover many common forms. The
(?!:[0-9])negative lookahead on line 34 correctly prevents matching unbracketed IPv6 followed by a port (since ports require brackets for IPv6).One observation: the patterns don't cover all valid IPv6 compressed forms (e.g.,
2001::db8:1with::in arbitrary positions), but this aligns with the PR description noting that some IPv6 edge cases are not handled.Consider adding a comment noting which IPv6 forms are intentionally unsupported for future maintainers:
+ // Note: Not all IPv6 compressed forms are supported (see issue #4185) // IPv6 address with optional brackets (brackets required if followed by port)
36-37: IPv4 pattern excludes 0.0.0.0 as intended.The pattern correctly requires the first octet to be
[1-9](not starting with 0), which excludes0.0.0.0. The remaining octets allow[1-9]?\dpermitting values 0-99, and the25[0-5]|2[0-4]\d|1\d\dcovers 100-255.However, I notice a potential issue: the pattern
[1-9]?\dfor octets 2-4 would match values like00or09(single digit with optional leading digit). This seems intentional but may produce unexpected matches.
58-58: Good extraction of URL schemes into a reusable array.Using a static readonly array for schemes improves maintainability and ensures consistency between the regex pattern and the scheme check in
Query.
63-66: Early return for non-URLs is a good refactor.Returning an empty list early when the input is not a URL simplifies the control flow and makes the intent clear. This is a cleaner approach than the previous structure.
78-82: Scheme check using LINQ is correct.The
Anycheck withStringComparison.OrdinalIgnoreCaseproperly handles case-insensitive scheme matching, consistent with the test cases like"HTTP://EXAMPLE.COM".
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Pull request overview
This PR fixes URL matching issues in the URL plugin by refactoring the regex pattern to support IPv6 addresses, removing exclusions for private IP addresses, and consolidating localhost handling into the main regex pattern.
Key Changes:
- Added comprehensive IPv6 support with both bracketed and unbracketed formats
- Removed private IP address exclusions (10.x.x.x, 192.168.x.x, 172.16-31.x.x) to allow matching private network addresses
- Refactored tests from a single test method with assertions to parameterized test cases using TestCase attributes
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 7 comments.
| File | Description |
|---|---|
| Plugins/Flow.Launcher.Plugin.Url/Main.cs | Replaced IPv4-only address matching with comprehensive IPv6 support, removed private network exclusions, added UrlSchemes array, adjusted port pattern to allow single digits, and refactored Query method control flow |
| Flow.Launcher.Test/Plugins/UrlPluginTest.cs | Converted from ClassicAssert to modern NUnit Assert.That syntax, added OneTimeSetUp for test initialization, and expanded test coverage with parameterized test cases for IPv6 addresses and edge cases |
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| var settingsField = typeof(Main).GetField("Settings", BindingFlags.NonPublic | BindingFlags.Static); | ||
| settingsField?.SetValue(null, new Settings()); |
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The OneTimeSetUp uses reflection to set the static Settings field directly, which is a workaround because the Main.Init() method is not called. This approach bypasses the normal initialization flow and creates a testing pattern that doesn't reflect how the plugin actually works. Consider refactoring the Main class to make it more testable, perhaps by injecting dependencies or providing a test-friendly initialization method, rather than using reflection to manipulate internal state.
| { | ||
| if (!raw.StartsWith("http://", StringComparison.OrdinalIgnoreCase) && !raw.StartsWith("https://", StringComparison.OrdinalIgnoreCase)) | ||
| // not a recognized scheme, add preferred http scheme | ||
| if (!UrlSchemes.Any(scheme => raw.StartsWith(scheme, StringComparison.OrdinalIgnoreCase))) |
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The code uses UrlSchemes.Any(scheme => raw.StartsWith(scheme, StringComparison.OrdinalIgnoreCase)) which iterates through the array and performs string comparisons for each scheme. Given that this array only contains 3 elements, the performance impact is minimal. However, for consistency with the original approach and slightly better performance, you could use explicit OR conditions with StartsWith for each scheme, avoiding the LINQ overhead entirely.
| if (!UrlSchemes.Any(scheme => raw.StartsWith(scheme, StringComparison.OrdinalIgnoreCase))) | |
| if (!(raw.StartsWith(UrlSchemes[0], StringComparison.OrdinalIgnoreCase) | |
| || raw.StartsWith(UrlSchemes[1], StringComparison.OrdinalIgnoreCase) | |
| || raw.StartsWith(UrlSchemes[2], StringComparison.OrdinalIgnoreCase))) |
| ")" + | ||
| // port number | ||
| "(?::\\d{2,5})?" + | ||
| "(?::\\d{1,5})?" + |
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The port pattern :\d{1,5} allows ports from 1 to 99999, but valid port numbers range from 1 to 65535. This will incorrectly match invalid ports like ":99999" or ":70000". While the original code had the same issue with high ports, changing from \d{2,5} to \d{1,5} now also allows single-digit ports (which are valid but uncommon). Consider using a more precise regex pattern that validates the actual port range (1-65535), such as :(6553[0-5]|655[0-2][0-9]|65[0-4][0-9]{2}|6[0-4][0-9]{3}|[1-5][0-9]{4}|[1-9][0-9]{0,3}).
| "(?:(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}|" + // standard IPv6 | ||
| "(?:[0-9a-fA-F]{1,4}:){1,7}:|" + // IPv6 with trailing :: | ||
| "(?:[0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|" + // IPv6 compressed | ||
| "::(?:[0-9a-fA-F]{1,4}:){0,6}[0-9a-fA-F]{1,4}|" + // IPv6 with leading :: | ||
| "(?:(?:[0-9a-fA-F]{1,4}:){1,6}|:):(?:[0-9a-fA-F]{1,4}:){0,5}[0-9a-fA-F]{1,4}|" + // IPv6 with :: in the middle | ||
| "::1)(?!:[0-9])" + // IPv6 loopback (not followed by port) |
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The negative lookahead (?!:[0-9]) only applies to the "::1" pattern on line 34, not to the other unbracketed IPv6 patterns (lines 29-33). This means addresses like "2001:db8::1" could be followed by ":8080" and the pattern would try to interpret ":8080" as part of the IPv6 address rather than as a port number, leading to ambiguous parsing. RFC 3986 requires brackets around IPv6 addresses in URLs specifically to avoid this ambiguity. The negative lookahead should apply to all unbracketed IPv6 alternatives, or unbracketed IPv6 support should be reconsidered given the inherent ambiguity.
| "(?:\\[(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}\\]|" + // standard IPv6 | ||
| "\\[(?:[0-9a-fA-F]{1,4}:){1,7}:\\]|" + // IPv6 with trailing :: | ||
| "\\[(?:[0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}\\]|" + // IPv6 compressed | ||
| "\\[::(?:[0-9a-fA-F]{1,4}:){0,6}[0-9a-fA-F]{1,4}\\]|" + // IPv6 with leading :: | ||
| "\\[(?:(?:[0-9a-fA-F]{1,4}:){1,6}|:):(?:[0-9a-fA-F]{1,4}:){0,5}[0-9a-fA-F]{1,4}\\]|" + // IPv6 with :: in the middle | ||
| "\\[::1\\])" + // IPv6 loopback | ||
| "|" + |
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@VictoriousRaptor instead of a massive regex string, would Uri.TryCreate work for our scenarios? (Also IPAddress.TryParse for IPs)
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@VictoriousRaptor instead of a massive regex string, would
Uri.TryCreatework for our scenarios? (AlsoIPAddress.TryParsefor IPs)
I did try but they made it more complicated. Uri.TryCreate can't deal with strings without a xxx:// scheme and IPAddress.TryParse can't parse strings with a scheme. I didnt figure out how to mix them, but we need both of them parsed.
Fixes #4184. A rework of #4185 as it's very tricky to solve all IPv6 related problems so I just leave it.
What's done: