{"record":{"id":"04a2a23c0c058cf4","repo":"router-for-me/CLIProxyAPI","slug":"management-handler-panic-v","errorCode":null,"errorMessage":"management handler panic: %v","messagePattern":"management handler panic: (.+?)","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/pluginhost/management.go","lineNumber":337,"sourceCode":"\tif statusCode == 0 {\n\t\tstatusCode = http.StatusOK\n\t}\n\tw.WriteHeader(statusCode)\n\tif _, errWrite := w.Write(resp.Body); errWrite != nil {\n\t\tlog.Warnf(\"pluginhost: failed to write plugin resource response: %v\", errWrite)\n\t}\n\treturn true\n}\n\nfunc (h *Host) callManagementHandler(ctx context.Context, record managementRouteRecord, req pluginapi.ManagementRequest) (resp pluginapi.ManagementResponse, err error) {\n\tif h == nil || record.route.Handler == nil || h.isPluginFused(record.pluginID) || !h.pluginIdentityCurrent(record.pluginID, record.path, record.version) {\n\t\treturn pluginapi.ManagementResponse{}, nil\n\t}\n\tdefer func() {\n\t\tif recovered := recover(); recovered != nil {\n\t\t\th.fusePlugin(record.pluginID, \"ManagementHandler.HandleManagement\", recovered)\n\t\t\tresp = pluginapi.ManagementResponse{}\n\t\t\terr = fmt.Errorf(\"management handler panic: %v\", recovered)\n\t\t}\n\t}()\n\treturn record.route.Handler.HandleManagement(ctx, req)\n}\n\nfunc escapeManagementResponseBody(resp pluginapi.ManagementResponse) []byte {\n\tbody, okEscaped := htmlsanitize.JSONBodyIfLikely(resp.Body, resp.Headers.Get(\"Content-Type\"))\n\tif !okEscaped {\n\t\treturn resp.Body\n\t}\n\treturn body\n}\n\nfunc (h *Host) callResourceHandler(ctx context.Context, record resourceRouteRecord, req pluginapi.ManagementRequest) (resp pluginapi.ManagementResponse, err error) {\n\tif h == nil || record.route.Handler == nil || h.isPluginFused(record.pluginID) || !h.pluginIdentityCurrent(record.pluginID, record.path, record.version) {\n\t\treturn pluginapi.ManagementResponse{}, nil\n\t}\n\tdefer func() {","sourceCodeStart":319,"sourceCodeEnd":355,"githubUrl":"https://github.com/router-for-me/CLIProxyAPI/blob/78f0c4079e3e6273d65d03b5549cffc898703264/internal/pluginhost/management.go#L319-L355","documentation":"Same isolation pattern for the management HTTP route handlers: when a request hits a plugin-registered management route and the plugin's HandleManagement panics, the host recovers, fuses the plugin, and returns this error. The management endpoint then reports failure instead of taking down the server.","triggerScenarios":"A management route handler panicking on a specific request: nil deref on a header, type assertion failure on the request body, slice bounds on a path parameter.","commonSituations":"Plugin handlers only tested with happy-path requests; unexpected request shapes (missing query params, empty bodies) from management UI or scripts; plugin state mutated concurrently.","solutions":["Reproduce the failing management request and fix the panic cause in the plugin's HandleManagement","Guard the handler: validate req fields (path params, body) before use; avoid unchecked type assertions","Disable the offending route/plugin until fixed; restart the server afterwards since the plugin is fused"],"exampleFix":"// before (plugin handler)\nfunc (h route) HandleManagement(ctx context.Context, req pluginapi.ManagementRequest) (pluginapi.ManagementResponse, error) {\n    id := strings.Split(req.Path, \"/\")[2] // panics on short paths\n    ...\n}\n\n// after\nfunc (h route) HandleManagement(ctx context.Context, req pluginapi.ManagementRequest) (pluginapi.ManagementResponse, error) {\n    parts := strings.Split(strings.Trim(req.Path, \"/\"), \"/\")\n    if len(parts) < 2 {\n        return pluginapi.ManagementResponse{Status: http.StatusBadRequest, Body: []byte(\"invalid path\")}, nil\n    }\n    id := parts[1]\n    ...\n}","handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"resp, err := h.callManagementHandler(ctx, record, req)\nif err != nil {\n    if strings.Contains(err.Error(), \"management handler panic\") {\n        c.JSON(http.StatusInternalServerError, gin.H{\"error\": \"plugin management handler failed\"})\n        return\n    }\n}","preventionTips":["Validate request path params, query, and body before use in plugin handlers","Avoid unchecked type assertions in HandleManagement","Fuzz plugin handlers with malformed requests in CI"],"tags":["plugin","panic","management-api","http-handler","isolation"],"backgroundTag":null,"analyzedSha":"78f0c4079e3e6273d65d03b5549cffc898703264","analyzedAt":"2026-08-15T12:26:37.444Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}