README
¶
Fragmenta Multiplexer (mux)
Fragmenta mux is a replacement the standard http.ServeMux which offers a few additional features and improved efficiency. Features are very similar to gorilla/mux but with a few additions, and it is compatible with the standard http.Handler interface or handlers returning error.
It offers the following features:
- Named paramaters including regexp matches for params (e.g. {id:\d+} to match id only to one or more numerals)
- Delayed param parsing (url,query,form) with utility functions for extracting Int, Bool, Float params.
- Routes are evaluated strictly in order - add important routes first and catch-alls at the end
- Zero allocations when matching means low-memory use and responses as fast as httprouter for static routes
- A cache in front of route matching speeds up responses (under 100ns/op in a simple static case)
- Low memory usage (even with cache)
- Accepts either the standard http.Handler interface or mux.Handler (same but with error return)
- Add middleware http.HandlerFunc for chaining standard Go middleware for auth, logging etc.
It does not offer:
- Nested routes or groups
Install
Perform the usual incantation:
go get -u github.com/fragmenta/mux
Usage
Usage is as you'd expect if you've used the stdlib mux or gorilla mux. You can use the mux.Add/Get/Post to add handlers which return an error, or mux.AddHandler to add a stdlib http.HandlerFunc.
func main() {
m := mux.New()
m.Get(`/`,homeHandler)
m.Get(`/users`,users.HandleIndex)
m.Post(`/users`,users.HandleCreate)
m.Post(`/users/{id:\d+}/update`,users.HandleUpdate)
http.Handle("/", r)
}
Errors
Because of the handler signature returning errors, you can set an ErrorHandler which is called if an error occurs inside one of your handlers, and a FileHandler which is called for serving files if no route is found. This makes handling errors more elegant, instead of this:
if err != nil {
log.Printf("error occured:%s",err)
// .. do something to handle and display to user
return
}
you can do this in your handlers:
if err != nil {
return err
}
and display errors in a consistent way using your ErrorHandler function (you can also return a custom error type from handlers as fragmenta does to send more information than just error).
Params
Parsing of params is delayed until you require them in your handler - no parsing is done until that point. When you do require them, just parse params as follows, and a full params object will be available with a map of all params from urls, and form bodies. Multipart file forms are parsed automatically and the files made available for use.
// Parse params (any url, query and form params)
params,err := mux.Params(request)
if err != nil {
return err
}
params.Values["key"][4]
params.Get("my_query_key")
params.GetInt("user_id")
params.GetFloat("float")
params.GetBool("bool")
params.GetDate("published_at","2017-01-02")
for _,fh := range params.Files {
}
Benchmarks
Speed isn't everything (see the list of features above), but it is important the router doesn't slow down request times, particularly if you have a lot of urls to match. For benchmarks against a few popular routers, see https://github.com/kennygrant/routebench
Performance is adequate:
BenchmarkStatic/stdlib_mux-4 1000 1946545 ns/op 20619 B/op 537 allocs/op
BenchmarkStatic/gorilla_mux-4 1000 1846382 ns/op 115648 B/op 1578 allocs/op
BenchmarkStatic/fragmenta_mux-4 100000 13969 ns/op 0 B/op 0 allocs/op
BenchmarkStatic/httprouter_mux-4 100000 16240 ns/op 0 B/op 0 allocs/op
BenchmarkGithubFuzz/stdlib_mux-4 300 4592686 ns/op 35767 B/op 902 allocs/op
BenchmarkGithubFuzz/gorilla_mux-4 100 12931693 ns/op 246784 B/op 2590 allocs/op
BenchmarkGithubFuzz/fragmenta_mux-4 5000 324911 ns/op 7617 B/op 136 allocs/op
BenchmarkGithubFuzz/httprouter_mux-4 10000 101702 ns/op 23791 B/op 296 allocs/op
Documentation
¶
Index ¶
- Variables
- func SetDefault(m *Mux)
- type ErrorHandlerFunc
- type HandlerFunc
- type Middleware
- type Mux
- func (m *Mux) Add(pattern string, handler HandlerFunc) Route
- func (m *Mux) AddHandler(pattern string, handler http.HandlerFunc) Route
- func (m *Mux) AddMiddleware(middleware Middleware)
- func (m *Mux) Get(pattern string, handler HandlerFunc) Route
- func (m *Mux) Match(r *http.Request) Route
- func (m *Mux) Post(pattern string, handler HandlerFunc) Route
- func (m *Mux) RouteRequest(w http.ResponseWriter, r *http.Request)
- func (m *Mux) ServeHTTP(w http.ResponseWriter, r *http.Request)
- type NaiveRoute
- func (r *NaiveRoute) Delete() Route
- func (r *NaiveRoute) Get() Route
- func (r *NaiveRoute) Handle(w http.ResponseWriter, req *http.Request) error
- func (r *NaiveRoute) Handler() HandlerFunc
- func (r *NaiveRoute) Match(path string) bool
- func (r *NaiveRoute) MatchMaybe(path string) bool
- func (r *NaiveRoute) MatchMethod(method string) bool
- func (r *NaiveRoute) Method(method string) Route
- func (r *NaiveRoute) Methods(permitted ...string) Route
- func (r *NaiveRoute) Parse(path string) map[string]string
- func (r *NaiveRoute) Pattern() string
- func (r *NaiveRoute) Post() Route
- func (r *NaiveRoute) Put() Route
- func (r *NaiveRoute) Setup(p string, h HandlerFunc) error
- func (r *NaiveRoute) String() string
- type PrefixRoute
- type RequestParams
- func (p *RequestParams) Add(key string, values []string)
- func (p *RequestParams) Delete(key string)
- func (p *RequestParams) Exists(key string) bool
- func (p *RequestParams) Get(key string) string
- func (p *RequestParams) GetDate(key string, format string) (time.Time, error)
- func (p *RequestParams) GetFloat(key string) float64
- func (p *RequestParams) GetFloats(key string) []float64
- func (p *RequestParams) GetInt(key string) int64
- func (p *RequestParams) GetInts(key string) []int64
- func (p *RequestParams) GetIntsString(key string) string
- func (p *RequestParams) GetStrings(key string) []string
- func (p *RequestParams) GetUniqueInts(key string) []int64
- func (p *RequestParams) Map() map[string]string
- func (p *RequestParams) Set(key string, values []string)
- func (p *RequestParams) SetInt(key string, v int64)
- func (p *RequestParams) SetString(key string, v string)
- type Route
Constants ¶
This section is empty.
Variables ¶
var MaxCacheEntries = 500
MaxCacheEntries defines the maximum number of entries in the request->route cache 0 means caching is turned off
Functions ¶
func SetDefault ¶
func SetDefault(m *Mux)
SetDefault sets the default mux on the package for use in parsing params we could instead decorate each request with a reference to the Route but this means extra allocations for each request, when almost all apps require only one mux.
Types ¶
type ErrorHandlerFunc ¶
type ErrorHandlerFunc func(w http.ResponseWriter, r *http.Request, err error)
ErrorHandlerFunc defines a HandlerFunc which accepts an error and displays it.
type HandlerFunc ¶
type HandlerFunc func(w http.ResponseWriter, r *http.Request) error
HandlerFunc defines a std net/http HandlerFunc, but which returns an error.
type Middleware ¶
type Middleware func(http.HandlerFunc) http.HandlerFunc
Middleware is a handler that wraps another handler
type Mux ¶
type Mux struct {
// See httptrace for best way to instrument
ErrorHandler ErrorHandlerFunc
FileHandler HandlerFunc
RedirectWWW bool
// contains filtered or unexported fields
}
Mux handles http requests by selecting a handler and passing the request to it. Routes are evaluated in the order they were added. Before the request reaches the handler it is passed through the middleware chain.
func (*Mux) Add ¶
func (m *Mux) Add(pattern string, handler HandlerFunc) Route
Add adds a route for this request with the default methods (GET/HEAD) Route is returned so that method functions can be chained
func (*Mux) AddHandler ¶
func (m *Mux) AddHandler(pattern string, handler http.HandlerFunc) Route
AddHandler adds a route for this pattern using a stdlib http.HandlerFunc which does not return an error.
func (*Mux) AddMiddleware ¶
func (m *Mux) AddMiddleware(middleware Middleware)
AddMiddleware adds a middleware function, this should be done before starting the server as it remakes our chain of middleware. This prepends to our chain of middleware
func (*Mux) Get ¶
func (m *Mux) Get(pattern string, handler HandlerFunc) Route
Get adds a route for this pattern/hanlder with the default methods (GET/HEAD)
func (*Mux) Post ¶
func (m *Mux) Post(pattern string, handler HandlerFunc) Route
Post adds a route for this pattern/hanlder with method http.PostMethod
func (*Mux) RouteRequest ¶
func (m *Mux) RouteRequest(w http.ResponseWriter, r *http.Request)
RouteRequest is the final endpoint of all requests
type NaiveRoute ¶
type NaiveRoute struct {
// contains filtered or unexported fields
}
NaiveRoute holds a pattern which matches a route and params within it, and an associated handler which will be called when the route matches.
func (*NaiveRoute) Delete ¶
func (r *NaiveRoute) Delete() Route
Delete sets the method exclusively to DELETE
func (*NaiveRoute) Handle ¶
func (r *NaiveRoute) Handle(w http.ResponseWriter, req *http.Request) error
Handle calls the handler with the writer and request.
func (*NaiveRoute) Handler ¶
func (r *NaiveRoute) Handler() HandlerFunc
Handler returns our handlerfunc.
func (*NaiveRoute) Match ¶
func (r *NaiveRoute) Match(path string) bool
Match returns true if this route matches the path given.
func (*NaiveRoute) MatchMaybe ¶
func (r *NaiveRoute) MatchMaybe(path string) bool
MatchMaybe returns false if the path definitely is not MatchMethod or true/maybe if it *may* match.
func (*NaiveRoute) MatchMethod ¶
func (r *NaiveRoute) MatchMethod(method string) bool
MatchMethod returns true if our list of methods contains method
func (*NaiveRoute) Method ¶
func (r *NaiveRoute) Method(method string) Route
Method sets the method exclusively to method
func (*NaiveRoute) Methods ¶
func (r *NaiveRoute) Methods(permitted ...string) Route
Methods sets the methods allowed as an array
func (*NaiveRoute) Parse ¶
func (r *NaiveRoute) Parse(path string) map[string]string
Parse parses this path given our regexp and returns a map of URL params.
func (*NaiveRoute) Pattern ¶
func (r *NaiveRoute) Pattern() string
Pattern returns the string pattern for the route
func (*NaiveRoute) Post ¶
func (r *NaiveRoute) Post() Route
Post sets the method exclusively to POST
func (*NaiveRoute) Setup ¶
func (r *NaiveRoute) Setup(p string, h HandlerFunc) error
Setup sets up the route from a pattern
func (*NaiveRoute) String ¶
func (r *NaiveRoute) String() string
String returns the route formatted as a string
type PrefixRoute ¶
type PrefixRoute struct {
NaiveRoute
// contains filtered or unexported fields
}
PrefixRoute uses a static prefix to reject route matches quickly.
func (*PrefixRoute) MatchMaybe ¶
func (r *PrefixRoute) MatchMaybe(path string) bool
MatchMaybe returns false if the path definitely is not MatchMethod or true/maybe if it *may* match.
func (*PrefixRoute) Setup ¶
func (r *PrefixRoute) Setup(p string, h HandlerFunc) error
Setup sets up the pattern prefix for the Prefix route.
func (*PrefixRoute) String ¶
func (r *PrefixRoute) String() string
String returns the route formatted as a string.
type RequestParams ¶
type RequestParams struct {
Values url.Values
Files map[string][]*multipart.FileHeader
}
RequestParams parses all params in a request and stores them in Values this includes: path params (from route) query params (from request) body params (from form request bodies)
func Params ¶
func Params(r *http.Request) (*RequestParams, error)
Params returns a new set of params parsed from the request.
func ParamsJSON ¶
func ParamsJSON(r *http.Request) (*RequestParams, error)
ParamsJSON returns a new set of params parsed from the request (json included, for testing). This is a temporary method for testing json parsing, we should add this capability to Params()
func ParamsWithMux ¶
func ParamsWithMux(m *Mux, r *http.Request) (*RequestParams, error)
ParamsWithMux returns params for a given mux and request
func (*RequestParams) Add ¶
func (p *RequestParams) Add(key string, values []string)
Add appends these values to this key, without removing any other entries.
func (*RequestParams) Delete ¶
func (p *RequestParams) Delete(key string)
Delete all values associated with the key.
func (*RequestParams) Exists ¶
func (p *RequestParams) Exists(key string) bool
Exists returns true if this key exists in Values
func (*RequestParams) Get ¶
func (p *RequestParams) Get(key string) string
Get returns the first value for this key or a blank string if no entry.
func (*RequestParams) GetDate ¶
GetDate returns the first value associated with a given key as a time,
using the given time format.
func (*RequestParams) GetFloat ¶
func (p *RequestParams) GetFloat(key string) float64
GetFloat returns the first value associated with the key as an integer. If there is no value or a parse error, it returns 0.0
func (*RequestParams) GetFloats ¶
func (p *RequestParams) GetFloats(key string) []float64
GetFloats returns all values associated with the key as an array of floats.
func (*RequestParams) GetInt ¶
func (p *RequestParams) GetInt(key string) int64
GetInt returns the first value associated with the given key as an integer. If there is no value or a parse error, it returns 0 If the string contains non-numeric characters, it is truncated from the first non-numeric character.
func (*RequestParams) GetInts ¶
func (p *RequestParams) GetInts(key string) []int64
GetInts returns all values associated with the key as an array of integers.
func (*RequestParams) GetIntsString ¶
func (p *RequestParams) GetIntsString(key string) string
GetIntsString returns all values associated with the key as a comma separated string.
func (*RequestParams) GetStrings ¶
func (p *RequestParams) GetStrings(key string) []string
GetStrings returns all string values associated with this key if there are no values associated an empty array is returned
func (*RequestParams) GetUniqueInts ¶
func (p *RequestParams) GetUniqueInts(key string) []int64
GetUniqueInts returns all unique non-zero int values associated with the given key as an array of integers
func (*RequestParams) Map ¶
func (p *RequestParams) Map() map[string]string
Map returns a flattened map of params with only one entry for each key, rather than the array of values Request params allow.
func (*RequestParams) Set ¶
func (p *RequestParams) Set(key string, values []string)
Set sets this key to these values, removing any other entries.
func (*RequestParams) SetInt ¶
func (p *RequestParams) SetInt(key string, v int64)
SetInt sets this key to this single string value, removing any other entries.
func (*RequestParams) SetString ¶
func (p *RequestParams) SetString(key string, v string)
SetString sets this key to this single string value, removing any other entries.
type Route ¶
type Route interface {
// Match against URL
MatchMethod(string) bool
MatchMaybe(string) bool
Match(string) bool
// Handler returns the handler to execute
Handler() HandlerFunc
// Parse the URL for params according to pattern
Parse(string) map[string]string
// Set accepted methods
Get() Route
Post() Route
Put() Route
Delete() Route
Methods(...string) Route
}
Route defines the interface routes are expected to conform to.
func NewNaiveRoute ¶
func NewNaiveRoute(pattern string, handler HandlerFunc) (Route, error)
NewNaiveRoute creates a new Route, given a pattern to match and a handler for the route.
func NewPrefixRoute ¶
func NewPrefixRoute(pattern string, handler HandlerFunc) (Route, error)
NewPrefixRoute creates a new PrefixRoute, given a pattern to match and a handler for the route.
Source Files
Directories
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| Path | Synopsis |
|---|---|
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Package log provides logging interfaces for use in handlers and loggers for stdout, files, and time series databases
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Package log provides logging interfaces for use in handlers and loggers for stdout, files, and time series databases |
|
adapters/influx
Package influx sends values to an influxdb database
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Package influx sends values to an influxdb database |
|
middleware
|
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gzip
Package gzip provides gzip middleware to gzip responses where appropriate
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Package gzip provides gzip middleware to gzip responses where appropriate |
|
secure
Package secure adds headers to protect against xss and reflection attacks and force use of https
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Package secure adds headers to protect against xss and reflection attacks and force use of https |