// Copyright (c) 2015-2021 MinIO, Inc. // // This file is part of MinIO Object Storage stack // // This program is free software: you can redistribute it and/or modify // it under the terms of the GNU Affero General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU Affero General Public License for more details. // // You should have received a copy of the GNU Affero General Public License // along with this program. If not, see . package cmd import ( "bytes" "context" "io" "net" "net/http" "reflect" "regexp" "runtime" "strconv" "strings" "time" "github.com/minio/madmin-go" "github.com/minio/minio/internal/handlers" "github.com/minio/minio/internal/logger" ) // recordRequest - records the first recLen bytes // of a given io.Reader type recordRequest struct { // Data source to record io.Reader // Response body should be logged logBody bool // Internal recording buffer buf bytes.Buffer // total bytes read including header size bytesRead int } func (r *recordRequest) Close() error { // no-op return nil } func (r *recordRequest) Read(p []byte) (n int, err error) { n, err = r.Reader.Read(p) r.bytesRead += n if r.logBody { r.buf.Write(p[:n]) } if err != nil { return n, err } return n, err } func (r *recordRequest) BodySize() int { return r.bytesRead } // Return the bytes that were recorded. func (r *recordRequest) Data() []byte { // If body logging is enabled then we return the actual body if r.logBody { return r.buf.Bytes() } // ... otherwise we return placeholder return logger.BodyPlaceHolder } var ldapPwdRegex = regexp.MustCompile("(^.*?)LDAPPassword=([^&]*?)(&(.*?))?$") // redact LDAP password if part of string func redactLDAPPwd(s string) string { parts := ldapPwdRegex.FindStringSubmatch(s) if len(parts) > 0 { return parts[1] + "LDAPPassword=*REDACTED*" + parts[3] } return s } // getOpName sanitizes the operation name for mc func getOpName(name string) (op string) { op = strings.TrimPrefix(name, "github.com/minio/minio/cmd.") op = strings.TrimSuffix(op, "Handler-fm") op = strings.Replace(op, "objectAPIHandlers", "s3", 1) op = strings.Replace(op, "adminAPIHandlers", "admin", 1) op = strings.Replace(op, "(*webAPIHandlers)", "web", 1) op = strings.Replace(op, "(*storageRESTServer)", "internal", 1) op = strings.Replace(op, "(*peerRESTServer)", "internal", 1) op = strings.Replace(op, "(*lockRESTServer)", "internal", 1) op = strings.Replace(op, "(*stsAPIHandlers)", "sts", 1) op = strings.Replace(op, "LivenessCheckHandler", "healthcheck", 1) op = strings.Replace(op, "ReadinessCheckHandler", "healthcheck", 1) op = strings.Replace(op, "-fm", "", 1) return op } type contextTraceReqType string const contextTraceReqKey = contextTraceReqType("request-trace-info") // Hold related tracing data of a http request, any handler // can modify this struct to modify the trace information . type traceCtxt struct { requestRecorder *recordRequest responseRecorder *logger.ResponseWriter funcName string } // If trace is enabled, execute the request if it is traced by other handlers // otherwise, generate a trace event with request information but no response. func httpTracer(h http.Handler) http.Handler { return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { if globalTrace.NumSubscribers() == 0 { h.ServeHTTP(w, r) return } // Create tracing data structure and associate it to the request context tc := traceCtxt{} ctx := context.WithValue(r.Context(), contextTraceReqKey, &tc) r = r.WithContext(ctx) // Setup a http request and response body recorder reqRecorder := &recordRequest{Reader: r.Body} respRecorder := logger.NewResponseWriter(w) tc.requestRecorder = reqRecorder tc.responseRecorder = respRecorder // Execute call. r.Body = reqRecorder reqStartTime := time.Now().UTC() h.ServeHTTP(respRecorder, r) reqEndTime := time.Now().UTC() // Calculate input body size with headers reqHeaders := r.Header.Clone() reqHeaders.Set("Host", r.Host) if len(r.TransferEncoding) == 0 { reqHeaders.Set("Content-Length", strconv.Itoa(int(r.ContentLength))) } else { reqHeaders.Set("Transfer-Encoding", strings.Join(r.TransferEncoding, ",")) } inputBytes := reqRecorder.BodySize() for k, v := range reqHeaders { inputBytes += len(k) + len(v) } // Calculate node name nodeName := r.Host if nodeName == "" || globalIsDistErasure { nodeName = globalLocalNodeName } if host, port, err := net.SplitHostPort(nodeName); err == nil { if port == "443" || port == "80" { nodeName = host } } // Calculate reqPath reqPath := r.URL.RawPath if reqPath == "" { reqPath = r.URL.Path } // Calculate function name funcName := tc.funcName if funcName == "" { funcName = "" } rq := madmin.TraceRequestInfo{ Time: reqStartTime, Proto: r.Proto, Method: r.Method, RawQuery: redactLDAPPwd(r.URL.RawQuery), Client: handlers.GetSourceIP(r), Headers: reqHeaders, Path: reqPath, Body: reqRecorder.Data(), } rs := madmin.TraceResponseInfo{ Time: reqEndTime, Headers: respRecorder.Header().Clone(), StatusCode: respRecorder.StatusCode, Body: respRecorder.Body(), } cs := madmin.TraceCallStats{ Latency: rs.Time.Sub(respRecorder.StartTime), InputBytes: inputBytes, OutputBytes: respRecorder.Size(), TimeToFirstByte: respRecorder.TimeToFirstByte, } t := madmin.TraceInfo{ TraceType: madmin.TraceHTTP, FuncName: funcName, NodeName: nodeName, Time: reqStartTime, ReqInfo: rq, RespInfo: rs, CallStats: cs, } globalTrace.Publish(t) }) } func httpTrace(f http.HandlerFunc, logBody bool) http.HandlerFunc { return func(w http.ResponseWriter, r *http.Request) { tc, ok := r.Context().Value(contextTraceReqKey).(*traceCtxt) if !ok { // Tracing is not enabled for this request f.ServeHTTP(w, r) return } tc.funcName = getOpName(runtime.FuncForPC(reflect.ValueOf(f).Pointer()).Name()) tc.requestRecorder.logBody = logBody tc.responseRecorder.LogAllBody = logBody tc.responseRecorder.LogErrBody = true f.ServeHTTP(w, r) } } func httpTraceAll(f http.HandlerFunc) http.HandlerFunc { return httpTrace(f, true) } func httpTraceHdrs(f http.HandlerFunc) http.HandlerFunc { return httpTrace(f, false) }