{"record":{"id":"a3607b3b198a8a44","repo":"flipped-aurora/gin-vue-admin","slug":"mcp-s","errorCode":null,"errorMessage":"缺少MCP鉴权请求头: %s","messagePattern":"缺少MCP鉴权请求头: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"server/mcp/http_client.go","lineNumber":157,"sourceCode":"\treturn &result, nil\n}\n\nfunc getUpstream[T any](ctx context.Context, endpoint string, query url.Values) (*upstreamEnvelope[T], error) {\n\treturn doUpstream[T](ctx, http.MethodGet, endpoint, query, nil)\n}\n\nfunc postUpstream[T any](ctx context.Context, endpoint string, body any) (*upstreamEnvelope[T], error) {\n\treturn doUpstream[T](ctx, http.MethodPost, endpoint, nil, body)\n}\n\nfunc deleteUpstream[T any](ctx context.Context, endpoint string, body any) (*upstreamEnvelope[T], error) {\n\treturn doUpstream[T](ctx, http.MethodDelete, endpoint, nil, body)\n}\n\nfunc doUpstream[T any](ctx context.Context, method, endpoint string, query url.Values, body any) (*upstreamEnvelope[T], error) {\n\ttoken := authTokenFromContext(ctx)\n\tif token == \"\" {\n\t\treturn nil, fmt.Errorf(\"缺少MCP鉴权请求头: %s\", configuredAuthHeader())\n\t}\n\n\tendpoint = strings.TrimSpace(endpoint)\n\tif endpoint == \"\" {\n\t\treturn nil, fmt.Errorf(\"上游接口路径不能为空\")\n\t}\n\tif !strings.HasPrefix(endpoint, \"/\") {\n\t\tendpoint = \"/\" + endpoint\n\t}\n\n\tbaseURL := upstreamBaseURL()\n\trequestURL, err := url.Parse(baseURL + endpoint)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"构建上游请求地址失败: %w\", err)\n\t}\n\tif len(query) > 0 {\n\t\trequestURL.RawQuery = query.Encode()\n\t}","sourceCodeStart":139,"sourceCodeEnd":175,"githubUrl":"https://github.com/flipped-aurora/gin-vue-admin/blob/3136500ef380842b0eb6c4daa87c3f8a47fcf9e0/server/mcp/http_client.go#L139-L175","documentation":"doUpstream requires an auth token extracted from the request context (authTokenFromContext); when the configured auth header's token is empty it refuses to call upstream. This prevents unauthenticated requests to the GVA main service.","triggerScenarios":"MCP request arrived without the configured auth header (e.g. x-api-key / Authorization); token was set on the wrong header name; context value never populated by the MCP auth middleware before calling getUpstream/postUpstream/deleteUpstream.","commonSituations":"AI client misconfigured and not sending the MCP auth header; configuredAuthHeader() (env/config) changed while clients still send the old header name; calling upstream helpers outside the authenticated MCP handler flow (e.g. from a background task with a bare context.Context).","solutions":["Ensure the AI client sends the configured auth header with a valid token on every MCP request","Confirm configuredAuthHeader() matches what clients actually send (check env/config)","Verify the MCP auth middleware stores the token in the request context before tool handlers run","If calling from non-HTTP code paths, inject a valid token into the context explicitly"],"exampleFix":"// before\ntoken := authTokenFromContext(ctx)\nif token == \"\" {\n\treturn nil, fmt.Errorf(\"缺少MCP鉴权请求头: %s\", configuredAuthHeader())\n}\n// after (caller side check)\nfunc callTool(ctx context.Context) error {\n\tif authTokenFromContext(ctx) == \"\" {\n\t\treturn fmt.Errorf(\"callTool: context missing %s token\", configuredAuthHeader())\n\t}\n\t_, err := getUpstream[SomeData](ctx, \"/api/target\", nil)\n\treturn err\n}","handlingStrategy":"validation","validationCode":"func ensureAuthToken(ctx context.Context) error {\n\tif authTokenFromContext(ctx) == \"\" {\n\t\treturn fmt.Errorf(\"request is missing %s header\", configuredAuthHeader())\n\t}\n\treturn nil\n}","typeGuard":"func hasAuthToken(ctx context.Context) bool {\n\treturn authTokenFromContext(ctx) != \"\"\n}","tryCatchPattern":"result, err := getUpstream[Data](ctx, \"/api/x\", nil)\nif err != nil {\n\tif strings.Contains(err.Error(), \"缺少MCP鉴权请求头\") {\n\t\t// return 401-style guidance to the AI client\n\t}\n\treturn err\n}","preventionTips":["Always invoke upstream helpers only inside MCP handlers that ran the auth middleware","Keep configuredAuthHeader() consistent across clients and server config","Write a test that asserts a request without the header is rejected early","Never construct a bare context.Context for upstream calls in background jobs"],"tags":["authentication","mcp","headers"],"backgroundTag":"missing-auth-header","analyzedSha":"3136500ef380842b0eb6c4daa87c3f8a47fcf9e0","analyzedAt":"2026-08-31T13:50:02.721Z","schemaVersion":2},"datasetVersion":"2026-08-31T19:17:28.585Z"}