diff options
Diffstat (limited to 'modules/caddyhttp')
| -rw-r--r-- | modules/caddyhttp/logging.go | 144 | ||||
| -rw-r--r-- | modules/caddyhttp/server.go | 121 |
2 files changed, 149 insertions, 116 deletions
diff --git a/modules/caddyhttp/logging.go b/modules/caddyhttp/logging.go new file mode 100644 index 0000000..4faaec7 --- /dev/null +++ b/modules/caddyhttp/logging.go @@ -0,0 +1,144 @@ +// Copyright 2015 Matthew Holt and The Caddy Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package caddyhttp + +import ( + "errors" + "net" + "net/http" + "strings" + + "go.uber.org/zap" + "go.uber.org/zap/zapcore" +) + +// ServerLogConfig describes a server's logging configuration. If +// enabled without customization, all requests to this server are +// logged to the default logger; logger destinations may be +// customized per-request-host. +type ServerLogConfig struct { + // The default logger name for all logs emitted by this server for + // hostnames that are not in the LoggerNames (logger_names) map. + DefaultLoggerName string `json:"default_logger_name,omitempty"` + + // LoggerNames maps request hostnames to a custom logger name. + // For example, a mapping of "example.com" to "example" would + // cause access logs from requests with a Host of example.com + // to be emitted by a logger named "http.log.access.example". + LoggerNames map[string]string `json:"logger_names,omitempty"` + + // By default, all requests to this server will be logged if + // access logging is enabled. This field lists the request + // hosts for which access logging should be disabled. + SkipHosts []string `json:"skip_hosts,omitempty"` + + // If true, requests to any host not appearing in the + // LoggerNames (logger_names) map will not be logged. + SkipUnmappedHosts bool `json:"skip_unmapped_hosts,omitempty"` + + // If true, credentials that are otherwise omitted, will be logged. + // The definition of credentials is defined by https://fetch.spec.whatwg.org/#credentials, + // and this includes some request and response headers, i.e `Cookie`, + // `Set-Cookie`, `Authorization`, and `Proxy-Authorization`. + ShouldLogCredentials bool `json:"should_log_credentials,omitempty"` +} + +// wrapLogger wraps logger in a logger named according to user preferences for the given host. +func (slc ServerLogConfig) wrapLogger(logger *zap.Logger, host string) *zap.Logger { + if loggerName := slc.getLoggerName(host); loggerName != "" { + return logger.Named(loggerName) + } + return logger +} + +func (slc ServerLogConfig) getLoggerName(host string) string { + tryHost := func(key string) (string, bool) { + // first try exact match + if loggerName, ok := slc.LoggerNames[key]; ok { + return loggerName, ok + } + // strip port and try again (i.e. Host header of "example.com:1234" should + // match "example.com" if there is no "example.com:1234" in the map) + hostOnly, _, err := net.SplitHostPort(key) + if err != nil { + return "", false + } + loggerName, ok := slc.LoggerNames[hostOnly] + return loggerName, ok + } + + // try the exact hostname first + if loggerName, ok := tryHost(host); ok { + return loggerName + } + + // try matching wildcard domains if other non-specific loggers exist + labels := strings.Split(host, ".") + for i := range labels { + if labels[i] == "" { + continue + } + labels[i] = "*" + wildcardHost := strings.Join(labels, ".") + if loggerName, ok := tryHost(wildcardHost); ok { + return loggerName + } + } + + return slc.DefaultLoggerName +} + +func (slc *ServerLogConfig) clone() *ServerLogConfig { + clone := &ServerLogConfig{ + DefaultLoggerName: slc.DefaultLoggerName, + LoggerNames: make(map[string]string), + SkipHosts: append([]string{}, slc.SkipHosts...), + SkipUnmappedHosts: slc.SkipUnmappedHosts, + ShouldLogCredentials: slc.ShouldLogCredentials, + } + for k, v := range slc.LoggerNames { + clone.LoggerNames[k] = v + } + return clone +} + +// errLogValues inspects err and returns the status code +// to use, the error log message, and any extra fields. +// If err is a HandlerError, the returned values will +// have richer information. +func errLogValues(err error) (status int, msg string, fields []zapcore.Field) { + var handlerErr HandlerError + if errors.As(err, &handlerErr) { + status = handlerErr.StatusCode + if handlerErr.Err == nil { + msg = err.Error() + } else { + msg = handlerErr.Err.Error() + } + fields = []zapcore.Field{ + zap.Int("status", handlerErr.StatusCode), + zap.String("err_id", handlerErr.ID), + zap.String("err_trace", handlerErr.Trace), + } + return + } + status = http.StatusInternalServerError + msg = err.Error() + return +} + +// Variable name used to indicate that this request +// should be omitted from the access logs +const SkipLogVar = "skip_log" diff --git a/modules/caddyhttp/server.go b/modules/caddyhttp/server.go index f1909c4..83f1a53 100644 --- a/modules/caddyhttp/server.go +++ b/modules/caddyhttp/server.go @@ -18,7 +18,6 @@ import ( "context" "crypto/tls" "encoding/json" - "errors" "fmt" "net" "net/http" @@ -226,6 +225,11 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) { accLog := s.accessLogger.With(loggableReq) defer func() { + // this request may be flagged as omitted from the logs + if skipLog, ok := GetVar(r.Context(), SkipLogVar).(bool); ok && skipLog { + return + } + repl.Set("http.response.status", wrec.Status()) repl.Set("http.response.size", wrec.Size()) repl.Set("http.response.duration", duration) @@ -592,96 +596,6 @@ func (s *Server) protocol(proto string) bool { // EXPERIMENTAL: Subject to change or removal. func (s *Server) Listeners() []net.Listener { return s.listeners } -// ServerLogConfig describes a server's logging configuration. If -// enabled without customization, all requests to this server are -// logged to the default logger; logger destinations may be -// customized per-request-host. -type ServerLogConfig struct { - // The default logger name for all logs emitted by this server for - // hostnames that are not in the LoggerNames (logger_names) map. - DefaultLoggerName string `json:"default_logger_name,omitempty"` - - // LoggerNames maps request hostnames to a custom logger name. - // For example, a mapping of "example.com" to "example" would - // cause access logs from requests with a Host of example.com - // to be emitted by a logger named "http.log.access.example". - LoggerNames map[string]string `json:"logger_names,omitempty"` - - // By default, all requests to this server will be logged if - // access logging is enabled. This field lists the request - // hosts for which access logging should be disabled. - SkipHosts []string `json:"skip_hosts,omitempty"` - - // If true, requests to any host not appearing in the - // LoggerNames (logger_names) map will not be logged. - SkipUnmappedHosts bool `json:"skip_unmapped_hosts,omitempty"` - - // If true, credentials that are otherwise omitted, will be logged. - // The definition of credentials is defined by https://fetch.spec.whatwg.org/#credentials, - // and this includes some request and response headers, i.e `Cookie`, - // `Set-Cookie`, `Authorization`, and `Proxy-Authorization`. - ShouldLogCredentials bool `json:"should_log_credentials,omitempty"` -} - -// wrapLogger wraps logger in a logger named according to user preferences for the given host. -func (slc ServerLogConfig) wrapLogger(logger *zap.Logger, host string) *zap.Logger { - if loggerName := slc.getLoggerName(host); loggerName != "" { - return logger.Named(loggerName) - } - return logger -} - -func (slc ServerLogConfig) getLoggerName(host string) string { - tryHost := func(key string) (string, bool) { - // first try exact match - if loggerName, ok := slc.LoggerNames[key]; ok { - return loggerName, ok - } - // strip port and try again (i.e. Host header of "example.com:1234" should - // match "example.com" if there is no "example.com:1234" in the map) - hostOnly, _, err := net.SplitHostPort(key) - if err != nil { - return "", false - } - loggerName, ok := slc.LoggerNames[hostOnly] - return loggerName, ok - } - - // try the exact hostname first - if loggerName, ok := tryHost(host); ok { - return loggerName - } - - // try matching wildcard domains if other non-specific loggers exist - labels := strings.Split(host, ".") - for i := range labels { - if labels[i] == "" { - continue - } - labels[i] = "*" - wildcardHost := strings.Join(labels, ".") - if loggerName, ok := tryHost(wildcardHost); ok { - return loggerName - } - } - - return slc.DefaultLoggerName -} - -func (slc *ServerLogConfig) clone() *ServerLogConfig { - clone := &ServerLogConfig{ - DefaultLoggerName: slc.DefaultLoggerName, - LoggerNames: make(map[string]string), - SkipHosts: append([]string{}, slc.SkipHosts...), - SkipUnmappedHosts: slc.SkipUnmappedHosts, - ShouldLogCredentials: slc.ShouldLogCredentials, - } - for k, v := range slc.LoggerNames { - clone.LoggerNames[k] = v - } - return clone -} - // PrepareRequest fills the request r for use in a Caddy HTTP handler chain. w and s can // be nil, but the handlers will lose response placeholders and access to the server. func PrepareRequest(r *http.Request, repl *caddy.Replacer, w http.ResponseWriter, s *Server) *http.Request { @@ -701,31 +615,6 @@ func PrepareRequest(r *http.Request, repl *caddy.Replacer, w http.ResponseWriter return r } -// errLogValues inspects err and returns the status code -// to use, the error log message, and any extra fields. -// If err is a HandlerError, the returned values will -// have richer information. -func errLogValues(err error) (status int, msg string, fields []zapcore.Field) { - var handlerErr HandlerError - if errors.As(err, &handlerErr) { - status = handlerErr.StatusCode - if handlerErr.Err == nil { - msg = err.Error() - } else { - msg = handlerErr.Err.Error() - } - fields = []zapcore.Field{ - zap.Int("status", handlerErr.StatusCode), - zap.String("err_id", handlerErr.ID), - zap.String("err_trace", handlerErr.Trace), - } - return - } - status = http.StatusInternalServerError - msg = err.Error() - return -} - // originalRequest returns a partial, shallow copy of // req, including: req.Method, deep copy of req.URL // (into the urlCopy parameter, which should be on the |