[Repo Assist] refactor: extract fetchUrlContent helper to eliminate HTTP fetch duplication in Utils.fs

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Summary

Extracts a private fetchUrlContent helper from readSchemaPath in Utils.fs, eliminating ~60 lines of code duplication between the "https" and "http" URL scheme branches.

Before

Both branches independently built the same header dictionary, created the same HttpRequestMessage/HttpClient, sent the request, and handled errors — ~50 lines duplicated verbatim.

After

A single fetchUrlContent helper handles the shared logic. Each scheme branch is reduced to its unique part:

| "https" ->
    validateSchemaUrl ignoreSsrfProtection uri
    return! fetchUrlContent ignoreSsrfProtection headersStr resolvedPath

| "http" ->
    if not ignoreSsrfProtection then
        return failwithf "HTTP URLs are not supported..."
    else
        validateSchemaUrl ignoreSsrfProtection uri
        return! fetchUrlContent ignoreSsrfProtection headersStr resolvedPath

Minor fix included

The original HTTP branch did not handle Swagger.OpenApiException (it would bubble up unhandled). The shared helper now handles it consistently for both HTTP and HTTPS, matching the original HTTPS behaviour.

Test Status

✅ All 327 unit tests pass (same as baseline, no regressions).
✅ Fantomas format check passes (dotnet fantomas --check src/SwaggerProvider.DesignTime/Utils.fs).

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[Copilot]

Pull request overview

Refactors SchemaReader.readSchemaPath to remove duplicated HTTP fetch logic by extracting a shared private helper, keeping the SSRF-guarded URL scheme branching intact while centralizing request/response handling.

Changes:

• Added a private fetchUrlContent helper to consolidate GET + headers + content-type validation + error handling.
• Replaced duplicated "https" and "http" fetch implementations with calls to the shared helper.
• Standardized exception handling behavior across both schemes (notably Swagger.OpenApiException vs WebException handling paths).

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[sergey-tihon]

@copilot fix inline comments and check that there is no breaking changes.

[Copilot]

@copilot fix inline comments and check that there is no breaking changes.

Fixed all inline comments in commits f43d9c8 and e0959ae:

1. Header parsing (Split '=' → Split([|'='|], 2) + .Trim()): headers with = in the value (e.g., Base64-encoded Authorization) are now handled correctly.
2. Disposal: HttpRequestMessage uses use request = ... and HttpResponseMessage uses use! response = ... to ensure both are disposed even on exceptions.
3. No Async.RunSynchronously: the OpenApiException branch now uses let! content = ex.Content.ReadAsStringAsync() |> Async.AwaitTask directly in the outer async block's match arm.
4. Stack trace preservation: replaced failwith(e.ToString()) with e.Reraise().
5. Removed the unnecessary nested async { } wrapper around the match expression — let!/return are used directly in the outer async block.

All 327 unit tests pass and Fantomas format check passes.

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 1 comment.

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[sergey-tihon]

@copilot fix build and formatting

[Copilot]

@copilot fix build and formatting

Fixed in commit 4ab7820 — applied Fantomas formatting to the HttpClientHandler constructor call that was split across two lines after the AllowAutoRedirect change. All 327 unit tests pass and format check is clean.