hmiddleware

Documentation

Overview

Package hmiddleware provides common HTTP middleware.

Index

• func ACMEValidationMiddleware(validationURL *url.URL) func(http.Handler) http.Handler
• func CORS(next http.Handler) http.Handler
• func DisableKeepalive(next http.Handler) http.Handler
• func EnsureTLS(next http.Handler) http.Handler
• func PostRequestLogger(l logrus.FieldLogger) func(next http.Handler) http.Handler
• func PreRequestLogger(l logrus.FieldLogger) func(next http.Handler) http.Handler
• func RequestID(next http.Handler) http.Handler
• func Tags(next http.Handler) http.Handler
• type StructuredLogger
  • func (l *StructuredLogger) NewLogEntry(r *http.Request) middleware.LogEntry
• type StructuredLoggerEntry
  • func (l *StructuredLoggerEntry) Panic(v interface{}, stack []byte)
  • func (l *StructuredLoggerEntry) Write(status, bytes int, header http.Header, elapsed time.Duration, ...)

Examples

• CORS
• DisableKeepalive
• EnsureTLS
• Tags

Functions

func ACMEValidationMiddleware

func ACMEValidationMiddleware(validationURL *url.URL) func(http.Handler) http.Handler

ACMEValidationMiddleware implements the HTTP01 based redirect protocol specific to heroku ACM.

func CORS

func CORS(next http.Handler) http.Handler

CORS adds Cross-Origin Resource Sharing headers to all outgoing requests. This is known as something that is kind of hard to get right. See docs at https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS for more information.

Example

r := chi.NewRouter()
r.Use(CORS)

// OR

var h http.Handler

if err := http.ListenAndServe(":"+os.Getenv("PORT"), CORS(h)); err != nil {
	log.Fatal(err)
}

func DisableKeepalive

func DisableKeepalive(next http.Handler) http.Handler

DisableKeepalive instructs the Go HTTP stack to close the incoming HTTP connection once all requests processed by this middleware are complete.

Example

r := chi.NewRouter()
r.Use(DisableKeepalive)

// OR

var h http.Handler

if err := http.ListenAndServe(":"+os.Getenv("PORT"), DisableKeepalive(h)); err != nil {
	log.Fatal(err)
}

func EnsureTLS

func EnsureTLS(next http.Handler) http.Handler

EnsureTLS ensures all incoming requests identify as having been proxied via https from the upstream reverse proxy. The way that this uses to check relies on the `X-Forwarded-Proto` header which is not defined by any formal standard. For more information on this header, see https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-Proto.

Example

r := chi.NewRouter()
r.Use(EnsureTLS)

// OR

var h http.Handler

if err := http.ListenAndServe(":"+os.Getenv("PORT"), EnsureTLS(h)); err != nil {
	log.Fatal(err)
}

func PostRequestLogger

func PostRequestLogger(l logrus.FieldLogger) func(next http.Handler) http.Handler

PostRequestLogger is a middleware for the github.com/sirupsen/logrus to log requests. It logs things similar to heroku logs and adds remote_addr and user_agent. If you are using Chi, consider using the RequestLogger middleware instead.

func PreRequestLogger

func PreRequestLogger(l logrus.FieldLogger) func(next http.Handler) http.Handler

PreRequestLogger is a middleware for the github.com/sirupsen/logrus to log requests. It logs things similar to heroku logs and adds remote_addr and user_agent. If you are using Chi, consider using the RequestLogger middleware instead.

func RequestID

func RequestID(next http.Handler) http.Handler

func Tags

func Tags(next http.Handler) http.Handler

Tags provides a middleware function for seeding the context with a per-request tags that are eventually retrieved and logged by the StructuredLogger

Example

r := chi.NewRouter()
r.Use(Tags)
logger := logrus.StandardLogger()
l := &StructuredLogger{
	Logger: logger,
}
r.Use(middleware.RequestLogger(l))

r.Get("/", func(w http.ResponseWriter, r *http.Request) {
	// foo=bar will show up in the HTTP request logs generated by StructuredLogger
	tags.Extract(r.Context()).Set("foo", "bar")
	w.WriteHeader(http.StatusOK)
})

Types

type StructuredLogger

type StructuredLogger struct {
	Logger logrus.FieldLogger
}

StructuredLogger implements the LogFormatter interface from Chi. LogFormatter initiates the beginning of a new LogEntry per request. See https://github.com/go-chi/chi/blob/708d187cdc2beff37b6835250dd574f395ebaa03/middleware/logger.go#L54 For an example of how to use this middleware to combine Logrus logging with the Chi router, see https://github.com/go-chi/chi/blob/cca4135d8dddff765463feaf1118047a9e506b4a/_examples/logging/main.go#L2

func (*StructuredLogger) NewLogEntry

func (l *StructuredLogger) NewLogEntry(r *http.Request) middleware.LogEntry

NewLogEntry creates a new LogEntry at the start of a request.

type StructuredLoggerEntry

type StructuredLoggerEntry struct {
	Logger logrus.FieldLogger
	// contains filtered or unexported fields
}

StructuredLoggerEntry implements the LogEntry interface from Chi. LogEntry records the final log when a request completes. See https://github.com/go-chi/chi/blob/708d187cdc2beff37b6835250dd574f395ebaa03/middleware/logger.go#L60 For an example of how to use this middleware to combine Logrus logging with the Chi router, see https://github.com/go-chi/chi/blob/cca4135d8dddff765463feaf1118047a9e506b4a/_examples/logging/main.go#L2

func (*StructuredLoggerEntry) Panic

func (l *StructuredLoggerEntry) Panic(v interface{}, stack []byte)

Panic is called by Chi's Recoverer middleware. See https://github.com/go-chi/chi/blob/baf4ef5b139e284b297573d89daf587457153aa3/middleware/recoverer.go

func (*StructuredLoggerEntry) Write

func (l *StructuredLoggerEntry) Write(status, bytes int, header http.Header, elapsed time.Duration, extra interface{})

Write creates a new LogEntry at the end of a request.