/
middleware.go
154 lines (124 loc) · 4.45 KB
/
middleware.go
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package logging
import (
"context"
"fmt"
"net/http"
"regexp"
"strconv"
"strings"
"time"
"github.com/go-chi/chi/v5"
"github.com/go-chi/chi/v5/middleware"
"github.com/sirupsen/logrus"
"github.com/CMSgov/bcda-app/bcda/auth"
"github.com/CMSgov/bcda-app/bcda/models"
"github.com/CMSgov/bcda-app/bcda/responseutils"
responseutilsv2 "github.com/CMSgov/bcda-app/bcda/responseutils/v2"
"github.com/CMSgov/bcda-app/bcda/servicemux"
"github.com/CMSgov/bcda-app/log"
appMiddleware "github.com/CMSgov/bcda-app/middleware"
)
// https://github.com/go-chi/chi/blob/master/_examples/logging/main.go
func NewStructuredLogger() func(next http.Handler) http.Handler {
return middleware.RequestLogger(&StructuredLogger{Logger: log.Request})
}
type StructuredLogger struct {
Logger logrus.FieldLogger
}
func (l *StructuredLogger) NewLogEntry(r *http.Request) middleware.LogEntry {
entry := &log.StructuredLoggerEntry{Logger: l.Logger}
logFields := logrus.Fields{}
logFields["ts"] = time.Now().UTC().Format(time.RFC1123)
if reqID := middleware.GetReqID(r.Context()); reqID != "" {
logFields["request_id"] = reqID
}
scheme := "http"
if servicemux.IsHTTPS(r) {
scheme = "https"
}
logFields["http_scheme"] = scheme
logFields["http_proto"] = r.Proto
logFields["http_method"] = r.Method
logFields["remote_addr"] = r.RemoteAddr
logFields["forwarded_for"] = r.Header.Get("X-Forwarded-For")
logFields["user_agent"] = r.UserAgent()
logFields["accept_encoding"] = r.Header.Get("Accept-Encoding")
logFields["uri"] = fmt.Sprintf("%s://%s%s", scheme, r.Host, Redact(r.RequestURI))
if ad, ok := r.Context().Value(auth.AuthDataContextKey).(auth.AuthData); ok {
logFields["aco_id"] = ad.ACOID
logFields["token_id"] = ad.TokenID
logFields["cms_id"] = ad.CMSID
}
if tid, ok := r.Context().Value(appMiddleware.CtxTransactionKey).(string); ok {
logFields["transaction_id"] = tid
}
entry.Logger = entry.Logger.WithFields(logFields)
entry.Logger.Infoln("request started")
return entry
}
type StructuredLoggerEntry struct {
Logger logrus.FieldLogger
}
type ResourceTypeLogger struct {
Repository models.JobKeyRepository
}
func (rl *ResourceTypeLogger) LogJobResourceType(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
rw := getRespWriter(r.URL.Path)
jobKey, err := rl.extractJobKey(r)
if err != nil {
logger := log.GetCtxLogger(r.Context())
logger.Error("job key not found: ", err)
rw.Exception(r.Context(), w, http.StatusNotFound, responseutils.NotFoundErr, "Job not found")
return
}
ctx, _ := log.SetCtxLogger(r.Context(), "resource_type", jobKey.ResourceType)
next.ServeHTTP(w, r.WithContext(ctx))
})
}
func (rl *ResourceTypeLogger) extractJobKey(r *http.Request) (*models.JobKey, error) {
fileName := chi.URLParam(r, "fileName")
jobID := chi.URLParam(r, "jobID")
// Logging request for auditing
jobIdInt, err := strconv.ParseUint(jobID, 10, 32)
if err != nil {
return nil, err
}
jobKey, err := rl.Repository.GetJobKey(r.Context(), uint(jobIdInt), strings.TrimSpace(fileName))
return jobKey, err
}
func Redact(uri string) string {
re := regexp.MustCompile(`Bearer%20([^&]+)(?:&|$)`)
submatches := re.FindAllStringSubmatch(uri, -1)
for _, match := range submatches {
uri = strings.Replace(uri, match[1], "<redacted>", 1)
}
return uri
}
// NewCtxLogger adds new key value pair of {CtxLoggerKey: logrus.FieldLogger} to the requests context
func NewCtxLogger(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
logFields := logrus.Fields{}
logFields["request_id"] = middleware.GetReqID(r.Context())
if ad, ok := r.Context().Value(auth.AuthDataContextKey).(auth.AuthData); ok {
logFields["cms_id"] = ad.CMSID
}
logFields["transaction_id"] = r.Context().Value(appMiddleware.CtxTransactionKey).(string)
newLogEntry := &log.StructuredLoggerEntry{Logger: log.API.WithFields(logFields)}
r = r.WithContext(context.WithValue(r.Context(), log.CtxLoggerKey, newLogEntry))
next.ServeHTTP(w, r)
})
}
type fhirResponseWriter interface {
Exception(context.Context, http.ResponseWriter, int, string, string)
NotFound(context.Context, http.ResponseWriter, int, string, string)
}
func getRespWriter(path string) fhirResponseWriter {
if strings.Contains(path, "/v1/") {
return responseutils.NewResponseWriter()
} else if strings.Contains(path, "/v2/") {
return responseutilsv2.NewResponseWriter()
} else {
return responseutils.NewResponseWriter()
}
}