{"id":"e6d4eba280f604d2","repo":"gofiber/fiber","slug":"failed-to-append-certificate","errorCode":null,"errorMessage":"failed to append certificate","messagePattern":"failed to append certificate","errorType":"exception","errorClass":"ErrFailedToAppendCert","httpStatus":null,"severity":"error","filePath":"client/client.go","lineNumber":34,"sourceCode":"\t\"io\"\n\t\"os\"\n\t\"path/filepath\"\n\t\"slices\"\n\t\"sync\"\n\t\"sync/atomic\"\n\t\"time\"\n\n\t\"github.com/fxamacker/cbor/v2\"\n\t\"github.com/gofiber/fiber/v3/log\"\n\n\t\"github.com/gofiber/utils/v2\"\n\n\t\"github.com/valyala/fasthttp\"\n\t\"github.com/valyala/fasthttp/fasthttpproxy\"\n\t\"golang.org/x/net/http/httpproxy\"\n)\n\nvar ErrFailedToAppendCert = errors.New(\"failed to append certificate\")\n\n// Client provides Fiber's high-level HTTP API while delegating transport work\n// to fasthttp.Client, fasthttp.HostClient, or fasthttp.LBClient implementations.\n//\n// Settings configured on the client are shared across every request and may be\n// overridden per request when needed.\n// Client is safe for concurrent request execution after configuration is\n// complete. Concurrent configuration changes require external synchronization.\ntype Client struct {\n\tlogger    log.CommonLogger\n\ttransport httpClientTransport\n\n\theader  *Header\n\tparams  *QueryParam\n\tcookies *Cookie\n\tpath    *PathParam\n\n\tjsonMarshal   utils.JSONMarshal","sourceCodeStart":16,"sourceCodeEnd":52,"githubUrl":"https://github.com/gofiber/fiber/blob/9a4c7e57fe0b080a04235d28a4b0d2b4b353d58c/client/client.go#L16-L52","documentation":"Error \"failed to append certificate\" thrown in gofiber/fiber.","triggerScenarios":"Thrown at client/client.go:34 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"analyzedSha":"9a4c7e57fe0b080a04235d28a4b0d2b4b353d58c","analyzedAt":"2026-08-04T21:44:03.395Z","schemaVersion":2}