hnynethttp

README

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Documentation

Overview

Package hnynethttp provides Honeycomb wrappers for net/http Handlers.

Summary

hnynethttp provides wrappers for the `net/http` types: Handler and HandlerFunc

For best results, use WrapHandler to wrap the mux passed to http.ListenAndServe - this will get you an event for every HTTP request handled by the server.

Wrapping individual Handlers or HandleFuncs will generate events only for the endpoints that are wrapped; 404s, for example, will not generate events.

For a complete example showing this wrapper in use, please see the examples in https://github.com/honeycombio/beeline-go/tree/main/examples

Index

• func WrapHandler(handler http.Handler) http.Handler
• func WrapHandlerFunc(hf func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request)
• func WrapHandlerWithConfig(handler http.Handler, cfg config.HTTPIncomingConfig) http.Handler
• func WrapRoundTripper(r http.RoundTripper) http.RoundTripper
• func WrapRoundTripperWithConfig(r http.RoundTripper, cfg config.HTTPOutgoingConfig) http.RoundTripper

Examples

• WrapHandler
• WrapHandlerFunc

Functions

func WrapHandler

func WrapHandler(handler http.Handler) http.Handler

WrapHandler will create a Honeycomb event per invocation of this handler with all the standard HTTP fields attached. If passed a ServeMux instead, pull what you can from there

Example

// assume you have a handler named hello
var hello func(w http.ResponseWriter, r *http.Request)

globalmux := http.NewServeMux()
// add a bunch of routes to the muxer
globalmux.HandleFunc("/hello/", hello)

// wrap the globalmux with the honeycomb middleware to send one event per
// request
http.ListenAndServe(":8080", WrapHandler(globalmux))

func WrapHandlerFunc

func WrapHandlerFunc(hf func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request)

WrapHandlerFunc will create a Honeycomb event per invocation of this handler function with all the standard HTTP fields attached.

Example

// assume you have a handler function named helloServer
var helloServer func(w http.ResponseWriter, r *http.Request)

http.HandleFunc("/hello", WrapHandlerFunc(helloServer))

func WrapHandlerWithConfig

func WrapHandlerWithConfig(handler http.Handler, cfg config.HTTPIncomingConfig) http.Handler

WrapHandlerWithConfig will create a Honeycomb event per invocation of this handler with all the standard HTTP fields attached. If passed a ServeMux instead, pull what you can from there. The provided config has a HTTPTraceParserHook, it will be invoked when creating a new span or trace for each incoming HTTP request.

func WrapRoundTripper

func WrapRoundTripper(r http.RoundTripper) http.RoundTripper

WrapRoundTripper wraps an http transport for outgoing HTTP calls. Using a wrapped transport will send an event to Honeycomb for each outbound HTTP call you make. Include a context with outbound requests when possible to enable correlation

func WrapRoundTripperWithConfig

func WrapRoundTripperWithConfig(r http.RoundTripper, cfg config.HTTPOutgoingConfig) http.RoundTripper

WrapRoundTripperWithConfig is a version of WrapRoundTripper that accepts a config. If the config contains a HTTPTracePropagationHook, it will be invoked on each outgoing HTTP call. The return value, a map of header names to header strings, will be added to the headers of the outgoing request.