⚡️ Express inspired web framework written in Go
This report summarizes scanner evidence for gofiber/fiber, a Go project with 40,236 GitHub stars. SynthScan examined 245,765 lines of code across 505 source files, recording 443 pattern matches distributed across 7 syntactic categories. The legacy adjusted pattern signal is 3.0 (Low pattern signal); it is not an authorship estimate.
Use the findings to ask whether maintainers can explain intent, verify dependencies, simplify unnecessary scaffolding, and focus review effort. Risk Payload v1 adds ownership, supply-chain, over-engineering, and review-effort vectors when available. These are prompts for human verification, not probabilities, security findings, or measured maintenance costs.
Use each vector to guide manual verification of the underlying findings.
Payload schema: 1.0.0 · Engine: 2.0.0 · Scoring: heuristic-density-v1 · Scan date: 2026-10-31.
Can maintainers explain intent, assumptions, and trade-offs? 387 finding(s).
Are imports declared and package/API names verified? 56 finding(s).
Are wrappers, guards, and repeated structures necessary? 0 finding(s).
Which changes need focused human review? 443 finding(s).
This chart tracks the legacy adjusted pattern score across scan runs. Changes can reflect source changes, scan coverage, or detector/scoring versions; they do not measure AI adoption or prove that a team refactored code. Compare runs only when their scoring versions are compatible. The dashed line tracks the raw pattern-hit count.
Groups findings by configured severity weight. Severity is not a confidence estimate, security rating, or proof that a package is missing. Verify imports against the project's manifests and inspect each finding in its local design context.
This horizontal bar chart shows where configured pattern scores accumulate across directories. Treat the bars as locations to inspect, not as evidence of authorship or code quality. Use the file-level findings to decide whether a directory needs a focused ownership, dependency, complexity, or review check.
The scanner identified 443 distinct pattern matches across 7 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a detector match to inspect in context. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.
Reading the findings table: The Severity column indicates the configured finding weight (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — legacy comment-context matches receive a ×1.5 score weight. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier under the legacy scoring model.
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | req_interface_gen.go | 21 | // Per RFC 9110 §12.5.3, a missing Accept-Encoding accepts any coding (the first | COMMENT |
| LOW | req_interface_gen.go | 41 | // decodeContentCoding undoes one content coding of src's body within BodyLimit. | COMMENT |
| LOW | req_interface_gen.go | 61 | FullURL() string | COMMENT |
| LOW | req_interface_gen.go | 81 | // Repeated field lines are combined into one comma-joined list (RFC 9110 | COMMENT |
| LOW | req_interface_gen.go | 121 | // Defaults to the empty string "" if the cookie doesn't exist. | COMMENT |
| LOW | req_interface_gen.go | 141 | FormFile(key string) (*multipart.FileHeader, error) | COMMENT |
| LOW | req_interface_gen.go | 161 | // requires If-Modified-Since to be ignored otherwise. | COMMENT |
| LOW | req_interface_gen.go | 181 | // first, or nil when the header is absent. Empty lines are skipped, so its | COMMENT |
| LOW | req_interface_gen.go | 201 | // Returned value is only valid within the handler. Do not store any references. | COMMENT |
| LOW | req_interface_gen.go | 221 | // enabled but only UnixSocket trusted, the first valid IP from the left is returned. With | COMMENT |
| LOW | req_interface_gen.go | 241 | // isTrustedProxyIP checks whether the given IP string matches any configured trusted proxy. | COMMENT |
| LOW | req_interface_gen.go | 261 | // and therefore available to all following routes that match the request. | COMMENT |
| LOW | req_interface_gen.go | 281 | // value directly, so that slice is never built. Boxing a value that is not | COMMENT |
| LOW | req_interface_gen.go | 301 | // call. Copy it first if you need it to outlive one. | COMMENT |
| LOW | req_interface_gen.go | 321 | Params(key string, defaultValue ...string) string | COMMENT |
| LOW | req_interface_gen.go | 341 | // Queries()["field1"] == "value2" | COMMENT |
| LOW | req_interface_gen.go | 361 | // Subdomains returns a slice of subdomains from the host, excluding the last `offset` components. | COMMENT |
| LOW | register.go | 41 | // return c.Next() | COMMENT |
| LOW | domain.go | 221 | // DomainParam returns the value of a domain parameter from the context. | COMMENT |
| LOW | domain.go | 241 | COMMENT | |
| LOW | domain.go | 421 | // | COMMENT |
| LOW | domain.go | 441 | // marks the routes of the apps that register no automatic HEAD routes. | COMMENT |
| LOW | domain.go | 461 | // the lock of the app they belong to, so reading them unguarded would race | COMMENT |
| LOW | domain.go | 521 | // a placeholder route that carries its target app in the unexported group | COMMENT |
| LOW | domain.go | 561 | // An app that does not serve HEAD, or that turned the automatic routes off, | COMMENT |
| LOW | error.go | 41 | // 400 Bad Request status so propagating it does not surface as a 500. | COMMENT |
| LOW | color.go | 1 | // ⚡️ Fiber is an Express inspired web framework written in Go with ☕️ | COMMENT |
| LOW | color.go | 21 | // Optional. Default: "\u001b[92m" | COMMENT |
| LOW | router_skip.go | 21 | // staticSlashes has a bit per '/' count present among staticMethods' keys, so | COMMENT |
| LOW | res.go | 41 | // Available compression methods are gzip, br, and zstd. | COMMENT |
| LOW | res.go | 941 | // the head inside each index — since "a.for" and "a[b.class]" name properties, | COMMENT |
| LOW | res.go | 1201 | resp := &r.c.fasthttp.Response | COMMENT |
| LOW | res.go | 1241 | // sendFileIndexName is the file SendFile serves for a directory. | COMMENT |
| LOW | router_filter.go | 61 | // candidate they reject costs a sequential read of its head instead of a | COMMENT |
| LOW | router_filter.go | 81 | prefix2 uint64 | COMMENT |
| LOW | router_filter.go | 101 | COMMENT | |
| LOW | router_filter.go | 241 | // skip returns the index of the first route at or after i that f, the filter | COMMENT |
| LOW | router_test.go | 2121 | // Benchmark_Router_Chain_FilteredBucket runs middleware chains in front of an | COMMENT |
| LOW | router_test.go | 4521 | c.URI().SetPath(routesFixture.TestRoutes[i].Path) | COMMENT |
| LOW | router_test.go | 4541 | // | COMMENT |
| LOW | router_test.go | 4881 | strict.Use("/Pre", handler) | COMMENT |
| LOW | .golangci.yml | 261 | - revive | COMMENT |
| LOW | ctx_interface_gen.go | 21 | App() *App | COMMENT |
| LOW | ctx_interface_gen.go | 41 | // context should be canceled. Ctx can never be canceled, so Done always | COMMENT |
| LOW | ctx_interface_gen.go | 61 | // ContentLength returns the value of the Content-Length request header. Req and | COMMENT |
| LOW | ctx_interface_gen.go | 81 | GetHeaders() map[string][]string | COMMENT |
| LOW | ctx_interface_gen.go | 101 | RestartRouting() error | COMMENT |
| LOW | ctx_interface_gen.go | 121 | // You can use Redirect().To(), Redirect().Route() and Redirect().Back() for redirection. | COMMENT |
| LOW | ctx_interface_gen.go | 141 | // route currently executing, which inside middleware is the middleware itself, | COMMENT |
| LOW | ctx_interface_gen.go | 161 | // IsFinal reports whether this is the last handler of a matched non-middleware | COMMENT |
| LOW | ctx_interface_gen.go | 181 | // ID returns the connection-unique identifier fasthttp assigned to this request, | COMMENT |
| LOW | ctx_interface_gen.go | 201 | // KeepHijackedConns is set, and the handler must not touch the pooled Ctx. | COMMENT |
| LOW | ctx_interface_gen.go | 221 | release() | COMMENT |
| LOW | ctx_interface_gen.go | 241 | // ScheduleReclaim arms automatic reclamation of an abandoned context, returning | COMMENT |
| LOW | ctx_interface_gen.go | 261 | ScheduleReclaim(handlerDone <-chan struct{}, cancel context.CancelFunc) | COMMENT |
| LOW | ctx_interface_gen.go | 301 | // Per RFC 9110 §12.5.3, a missing Accept-Encoding accepts any coding (the first | COMMENT |
| LOW | ctx_interface_gen.go | 321 | // Reading it consumes the body, so a later Body call will not see it. | COMMENT |
| LOW | ctx_interface_gen.go | 341 | // matching what AcceptsLanguages negotiates on. | COMMENT |
| LOW | ctx_interface_gen.go | 361 | // MediaType returns the MIME type from the Content-Type header without parameters. | COMMENT |
| LOW | ctx_interface_gen.go | 381 | // shadowing AllCookies collapses is detected. The strings are copies. | COMMENT |
| 309 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| CRITICAL⚡ | res.go | 1574 | r.c.fasthttp.Response.Header.SetContentType(mimeType + "; charset=" + charset[0]) | CODE |
| CRITICAL⚡ | res.go | 1578 | r.c.fasthttp.Response.Header.SetContentType(mimeType + "; charset=utf-8") | CODE |
| CRITICAL⚡ | res.go | 1580 | r.c.fasthttp.Response.Header.SetContentType(mimeType) | CODE |
| CRITICAL | res.go | 193 | r.c.fasthttp.Response.Header.Del(field) | CODE |
| CRITICAL | res.go | 293 | r.c.fasthttp.Response.Header.Add(key, val) | CODE |
| CRITICAL | res.go | 409 | r.c.fasthttp.Response.Header.SetCookie(fcookie) | CODE |
| CRITICAL | res.go | 585 | r.c.fasthttp.Response.Header.SetContentType(h.MediaType) | CODE |
| CRITICAL | res.go | 616 | r.c.fasthttp.Response.Header.SetContentType(h.MediaType) | CODE |
| CRITICAL | res.go | 680 | return r.c.fasthttp.Response.Header.ContentLength() | CODE |
| CRITICAL | res.go | 687 | return r.c.app.toString(r.c.fasthttp.Response.Header.ContentType()) | CODE |
| CRITICAL | res.go | 819 | r.c.fasthttp.Response.Header.SetContentType(MIMETextJavaScriptCharsetUTF8) | CODE |
| CRITICAL | res.go | 1228 | r.c.fasthttp.Response.Header.Add("Link", h) | CODE |
| CRITICAL | res.go | 1235 | if !r.c.fasthttp.Request.Header.IsHTTP11() { | CODE |
| CRITICAL | res.go | 1532 | r.c.fasthttp.Response.Header.Set(key, val) | CODE |
| CRITICAL | res.go | 1536 | r.c.fasthttp.Response.Header.SetCanonical(utils.UnsafeBytes(key), utils.UnsafeBytes(val)) | CODE |
| CRITICAL | res.go | 1626 | r.c.fasthttp.Response.Header.Del(HeaderVary) | CODE |
| CRITICAL | res.go | 1637 | r.c.fasthttp.Response.Header.Del(HeaderVary) | CODE |
| CRITICAL⚡ | req.go | 362 | return r.c.app.toString(r.c.fasthttp.Request.Header.ContentType()) | CODE |
| CRITICAL⚡ | req.go | 367 | return r.c.app.toString(mediatype.StripParams(r.c.fasthttp.Request.Header.ContentType())) | CODE |
| CRITICAL⚡ | req.go | 372 | for name, v := range mediatype.Params(r.c.fasthttp.Request.Header.ContentType()) { | CODE |
| CRITICAL | req.go | 255 | return r.c.fasthttp.Request.Header.ContentLength() | CODE |
| CRITICAL | req.go | 440 | return defaultString(r.c.app.toString(r.c.fasthttp.Request.Header.Cookie(key)), defaultValue) | CODE |
| CRITICAL | req.go | 448 | for key := range r.c.fasthttp.Request.Header.Cookies() { | CODE |
| CRITICAL | req.go | 459 | for key, value := range r.c.fasthttp.Request.Header.Cookies() { | CODE |
| CRITICAL | req.go | 506 | if mediatype.IsForm(r.c.fasthttp.Request.Header.ContentType()) { | CODE |
| CRITICAL | req.go | 532 | if r.c.fasthttp.Request.IsBodyStream() && mediatype.ParsesPostArgs(r.c.fasthttp.Request.Header.ContentType()) { | CODE |
| CRITICAL | req.go | 1043 | ct := mediatype.StripParams(r.c.fasthttp.Request.Header.ContentType()) | CODE |
| CRITICAL | req.go | 1321 | if mediatype.IsForm(r.c.fasthttp.Request.Header.ContentType()) { | CODE |
| CRITICAL | req.go | 1332 | return r.c.app.toString(r.c.fasthttp.Request.Header.RequestURI()) | CODE |
| CRITICAL | req.go | 1507 | return r.c.app.toString(r.c.fasthttp.Request.Header.Protocol()) | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | bind_test.go | 810 | c.Request().Header.Add("Name", "John Doe") | CODE |
| LOW | bind_test.go | 839 | c.Request().Header.Add("Name", "Jane Doe") | CODE |
| LOW | bind_test.go | 852 | require.Equal(t, "Jane Doe", h2.Name) // check value get overwritten | CODE |
| LOW | bind_test.go | 881 | c.Request().Header.Add("Name", "John Doe") | CODE |
| LOW | bind_test.go | 1068 | c.Response().Header.Add("Name", "John Doe") | CODE |
| LOW | bind_test.go | 1097 | c.Response().Header.Add("Name", "Jane Doe") | CODE |
| LOW | bind_test.go | 1110 | require.Equal(t, "Jane Doe", h2.Name) // check value get overwritten | CODE |
| LOW | bind_test.go | 1139 | c.Response().Header.Add("Name", "John Doe") | CODE |
| LOW | bind_test.go | 1300 | c.Request().Header.Add("Name", "John Doe") | CODE |
| LOW | bind_test.go | 1321 | c.Request().Header.Add("Name", "John Doe") | CODE |
| LOW | bind_test.go | 1348 | c.Response().Header.Add("Name", "John Doe") | CODE |
| LOW | bind_test.go | 1369 | c.Response().Header.Add("Name", "John Doe") | CODE |
| LOW | bind_test.go | 2021 | c.Request().Header.SetCookie("Name", "John Doe") | CODE |
| LOW | bind_test.go | 2050 | c.Request().Header.SetCookie("Name", "Jane Doe") | CODE |
| LOW | bind_test.go | 2063 | require.Equal(t, "Jane Doe", h2.Name) // check value get overwritten | CODE |
| LOW | bind_test.go | 2094 | c.Request().Header.SetCookie("Name", "John Doe") | CODE |
| LOW | bind_test.go | 2281 | c.Request().Header.SetCookie("Name", "John Doe") | CODE |
| LOW | bind_test.go | 2304 | c.Request().Header.SetCookie("Name", "John Doe") | CODE |
| LOW | internal/schemehost/schemehost_test.go | 71 | "user@example.com", "user:pass@example.com", "example.com/path", | CODE |
| LOW | docs/middleware/session.md | 163 | if email == "admin@example.com" && password == "secret" { | CODE |
| LOW | docs/middleware/session.md | 842 | if email != "user@example.com" || password != "password" { | CODE |
| LOW | docs/middleware/session.md | 875 | return email == "user@example.com" && password == "password" | CODE |
| LOW | docs/api/ctx.md | 3010 | user := User{"John Doe"} | CODE |
| LOW | docs/api/ctx.md | 3014 | // => {"Name":"John Doe"} | COMMENT |
| LOW | docs/client/request.md | 473 | Name: "John Doe", | CODE |
| LOW | docs/client/request.md | 496 | "name": "John Doe" | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | redirect_test.go | 1038 | // Step 1: Make the initial request to the source route | COMMENT |
| LOW | redirect_test.go | 1056 | // Step 2: Make the second request to the target route with the cookie | COMMENT |
| LOW | redirect_test.go | 1104 | // Step 1: Make the initial request | COMMENT |
| LOW | redirect_test.go | 1121 | // Step 2: Make the second request with the cookie | COMMENT |
| LOW | helpers.go | 403 | // Step 2: first subtag must match (or be '*') | COMMENT |
| LOW | docs/guide/validation.md | 13 | ### Step 1: Install a validator | COMMENT |
| LOW | docs/guide/validation.md | 19 | ### Step 2: Wire it into the app config | COMMENT |
| LOW | docs/guide/validation.md | 45 | ### Step 3: Bind and validate in one call | COMMENT |
| LOW | docs/guide/validation.md | 77 | ### Step 4: Shape the error response | COMMENT |
| LOW | docs/guide/validation.md | 114 | ### Step 5: Add your own rules | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | redirect_test.go | 1038 | // Step 1: Make the initial request to the source route | COMMENT |
| LOW | redirect_test.go | 1056 | // Step 2: Make the second request to the target route with the cookie | COMMENT |
| LOW | redirect_test.go | 1104 | // Step 1: Make the initial request | COMMENT |
| LOW | redirect_test.go | 1121 | // Step 2: Make the second request with the cookie | COMMENT |
| LOW | helpers.go | 403 | // Step 2: first subtag must match (or be '*') | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | .golangci.yml | 279 | # time instead so it is robust to cache state. | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | req.go | 1566 | // Example usage: | COMMENT |
| LOW | extractors/extractors.go | 9 | // Example usage: | COMMENT |