{"record":{"id":"8e1ec1641970a447","repo":"flipped-aurora/gin-vue-admin","slug":"w-8e1ec1","errorCode":null,"errorMessage":"创建上游请求失败: %w","messagePattern":"创建上游请求失败: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"server/mcp/http_client.go","lineNumber":191,"sourceCode":"\tif len(query) > 0 {\n\t\trequestURL.RawQuery = query.Encode()\n\t}\n\n\tvar reader io.Reader\n\tif body != nil {\n\t\tpayload, err := json.Marshal(body)\n\t\tif err != nil {\n\t\t\treturn nil, fmt.Errorf(\"序列化上游请求失败: %w\", err)\n\t\t}\n\t\treader = bytes.NewReader(payload)\n\t}\n\n\ttimeoutCtx, cancel := context.WithTimeout(ctx, requestTimeout())\n\tdefer cancel()\n\n\treq, err := http.NewRequestWithContext(timeoutCtx, method, requestURL.String(), reader)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"创建上游请求失败: %w\", err)\n\t}\n\treq.Header.Set(\"Accept\", \"application/json\")\n\treq.Header.Set(upstreamAuthHeader, token)\n\tif body != nil {\n\t\treq.Header.Set(\"Content-Type\", \"application/json\")\n\t}\n\t// 链路传播:外部 AI → MCP 进程 → GVA 主服务串成同一条 trace\n\tlogger.InjectTraceHeaders(timeoutCtx, req)\n\n\tresp, err := http.DefaultClient.Do(req)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"请求上游服务失败: %w\", err)\n\t}\n\tdefer resp.Body.Close()\n\n\trawBody, err := io.ReadAll(resp.Body)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"读取上游响应失败: %w\", err)","sourceCodeStart":173,"sourceCodeEnd":209,"githubUrl":"https://github.com/flipped-aurora/gin-vue-admin/blob/3136500ef380842b0eb6c4daa87c3f8a47fcf9e0/server/mcp/http_client.go#L173-L209","documentation":"http.NewRequestWithContext rejected the request construction; the error is wrapped as '创建上游请求失败'. With an already-parsed URL this is rare and usually means an invalid HTTP method or a malformed URL string after requestURL.String().","triggerScenarios":"Method variable is empty or contains invalid characters; the parsed URL became invalid when re-serialized; nil/incorrect reader combination; context already canceled does not fail here but at Do.","commonSituations":"Refactor left method as \"\" or lowercase typos passed through; endpoint injection produced a URL with spaces; building requests with a custom method string from user input.","solutions":["Check the wrapped error text — it states exactly what NewRequestWithContext rejected","Verify the HTTP method is a valid token (GET/POST/DELETE) and never empty","Print requestURL.String() before creating the request to inspect the final URL","Restrict methods to the getUpstream/postUpstream/deleteUpstream wrappers instead of calling doUpstream with arbitrary strings"],"exampleFix":"// before\nmethod := \"\" // set somewhere upstream\nreq, err := http.NewRequestWithContext(timeoutCtx, method, requestURL.String(), reader)\n// after\nif method == \"\" {\n\tmethod = http.MethodGet\n}\nreq, err := http.NewRequestWithContext(timeoutCtx, method, requestURL.String(), reader)","handlingStrategy":"validation","validationCode":"func validMethod(m string) bool {\n\tswitch m {\n\tcase http.MethodGet, http.MethodPost, http.MethodDelete, http.MethodPut:\n\t\treturn true\n\t}\n\treturn false\n}","typeGuard":null,"tryCatchPattern":"result, err := doUpstream[Data](ctx, method, endpoint, nil, nil)\nif err != nil {\n\tif strings.Contains(err.Error(), \"创建上游请求失败\") {\n\t\t// check method string and final URL before retrying\n\t}\n\treturn err\n}","preventionTips":["Use the getUpstream/postUpstream/deleteUpstream wrappers instead of raw doUpstream calls","Never pass user-controlled strings as the HTTP method","Log requestURL.String() in development builds for easy inspection","Keep endpoint sanitization (trim, prefix '/') intact"],"tags":["http","request-construction","go"],"backgroundTag":"invalid-http-request","analyzedSha":"3136500ef380842b0eb6c4daa87c3f8a47fcf9e0","analyzedAt":"2026-08-31T13:50:02.721Z","schemaVersion":2},"datasetVersion":"2026-08-31T19:17:28.585Z"}