Route

Route Registration

Hertz provides methods like GET, POST, PUT, DELETE, ANY for registering routes.

MethodIntroduce
Hertz.GETThe method used to register the HTTP Method as GET
Hertz.POSTThe method used to register the HTTP Method as POST
Hertz.DELETEThe method used to register the HTTP Method as DELETE
Hertz.PUTThe method used to register the HTTP Method as PUT
Hertz.PATCHThe method used to register the HTTP Method as PATCH
Hertz.HEADThe method used to register the HTTP Method as HEAD
Hertz.OPTIONSThe method used to register the HTTP Method as OPTIONS
Hertz.HandleThe method supports to register a HTTP Method flexibly, which is the same as the above method when used to register a normal HTTP Method, and it also supports the registration of custom HTTP Method
Hertz.AnyThe method for registering all HTTP Methods
Hertz.StaticFile/Static/StaticFSFor registering static files

Sample Code:

package main

import (
	"context"
	"github.com/cloudwego/hertz/pkg/app"
	"github.com/cloudwego/hertz/pkg/app/server"
	"github.com/cloudwego/hertz/pkg/protocol/consts"
)

func main(){
	h := server.Default(server.WithHostPorts("127.0.0.1:8080"))
	
	h.StaticFS("/", &app.FS{Root: "./", GenerateIndexPages: true})

	h.GET("/get", func(ctx context.Context, c *app.RequestContext) {
		c.String(consts.StatusOK, "get")
	})
	h.POST("/post", func(ctx context.Context, c *app.RequestContext) {
		c.String(consts.StatusOK, "post")
	})
	h.PUT("/put", func(ctx context.Context, c *app.RequestContext) {
		c.String(consts.StatusOK, "put")
	})
	h.DELETE("/delete", func(ctx context.Context, c *app.RequestContext) {
		c.String(consts.StatusOK, "delete")
	})
	h.PATCH("/patch", func(ctx context.Context, c *app.RequestContext) {
		c.String(consts.StatusOK, "patch")
	})
	h.HEAD("/head", func(ctx context.Context, c *app.RequestContext) {
		c.String(consts.StatusOK, "head")
	})
	h.OPTIONS("/options", func(ctx context.Context, c *app.RequestContext) {
		c.String(consts.StatusOK, "options")
	})
	h.Any("/ping_any", func(ctx context.Context, c *app.RequestContext) {
		c.String(consts.StatusOK, "any")
	})
	h.Handle("LOAD","/load", func(ctx context.Context, c *app.RequestContext) {
		c.String(consts.StatusOK, "load")
	})
	h.Spin()
}

Group

Hertz provides the capability of Group, which are used to support route grouping functionality, and the middleware can also register with Group.

Sample Code:

package main

import (
	"context"
	"github.com/cloudwego/hertz/pkg/app"
	"github.com/cloudwego/hertz/pkg/app/server"
	"github.com/cloudwego/hertz/pkg/protocol/consts"
)

func main(){
	h := server.Default(server.WithHostPorts("127.0.0.1:8080"))
	v1 := h.Group("/v1")
	v1.GET("/get", func(ctx context.Context, c *app.RequestContext) {
		c.String(consts.StatusOK, "get")
	})
	v1.POST("/post", func(ctx context.Context, c *app.RequestContext) {
		c.String(consts.StatusOK, "post")
	})
	v2 := h.Group("/v2")
	v2.PUT("/put", func(ctx context.Context, c *app.RequestContext) {
		c.String(consts.StatusOK, "put")
	})
	v2.DELETE("/delete", func(ctx context.Context, c *app.RequestContext) {
		c.String(consts.StatusOK, "delete")
	})
	h.Spin()
}


Use middleware with route group

The following example uses the BasicAuth middleware in a route group.

Sample Code 1:

package main

import (
	"context"
	"github.com/cloudwego/hertz/pkg/app"
	"github.com/cloudwego/hertz/pkg/app/middlewares/server/basic_auth"
	"github.com/cloudwego/hertz/pkg/app/server"
	"github.com/cloudwego/hertz/pkg/protocol/consts"
)

func main() {
	h := server.Default(server.WithHostPorts("127.0.0.1:8080"))
	// use middleware
	v1 := h.Group("/v1", basic_auth.BasicAuth(map[string]string{"test": "test"}))

	// or use `Use` method
	//v1.Use(basic_auth.BasicAuth(map[string]string{"test": "test"}))
	v1.GET("/ping", func(c context.Context, ctx *app.RequestContext) {
		ctx.String(consts.StatusOK,"ping")
	})
	h.Spin()
}

Sample Code 2:

package main

import (
	"context"
	"github.com/cloudwego/hertz/pkg/app"
	"github.com/cloudwego/hertz/pkg/app/middlewares/server/basic_auth"
	"github.com/cloudwego/hertz/pkg/app/server"
	"github.com/cloudwego/hertz/pkg/protocol/consts"
)

func main() {
	h := server.Default(server.WithHostPorts("127.0.0.1:8080"))
	v1 := h.Group("/v1")
	// use `Use` method
	v1.Use(basic_auth.BasicAuth(map[string]string{"test": "test"}))
	v1.GET("/ping", func(c context.Context, ctx *app.RequestContext) {
		ctx.String(consts.StatusOK,"ping")
	})
	h.Spin()
}

Route Types

Hertz supports a variety of route types for complex functions, including static route, parametric route, and wildcard route.

Priority of the route: static route > parametric route > wildcard route

Static Route

See above for specific examples.

Parametric Route

Hertz supports the use of named parameters such as :name to set routes, and named parameters match only a single path segment.

If we set the route /user/:name, the match is as follows

path
/user/gordonmatched
/user/youmatched
/user/gordon/profilemismatched
/user/mismatched

By using the RequestContext.Param method, we can get the parameters carried in the route.

Sample Code:

package main

import (
	"context"
	"github.com/cloudwego/hertz/pkg/app"
	"github.com/cloudwego/hertz/pkg/app/server"
	"github.com/cloudwego/hertz/pkg/protocol/consts"
)

func main(){
	h := server.Default(server.WithHostPorts("127.0.0.1:8080"))
	// This handler will match: "/hertz/version", but will not match : "/hertz/" or "/hertz"
	h.GET("/hertz/:version", func(ctx context.Context, c *app.RequestContext) {
		version := c.Param("version")
		c.String(consts.StatusOK, "Hello %s", version)
	})
	h.Spin()
}


Wildcard Route

Hertz supports routing with wildcard parameters such as *filepath, and the wildcard parameter will match all contents of the current path segment.

If we set the route /src/*filepath, the match is as follows

path
/src/matched
/src/somefile.gomatched
/src/subdir/somefile.gomatched

By using the RequestContext.Param method, we can get the parameters carried in the route.

Sample Code:

package main

import (
	"context"
	"github.com/cloudwego/hertz/pkg/app"
	"github.com/cloudwego/hertz/pkg/app/server"
	"github.com/cloudwego/hertz/pkg/protocol/consts"
)

func main(){
	h := server.Default(server.WithHostPorts("127.0.0.1:8080"))
	// However, this one will match "/hertz/v1/" and "/hertz/v2/send"
	h.GET("/hertz/:version/*action", func(ctx context.Context, c *app.RequestContext) {
		version := c.Param("version")
		action := c.Param("action")
		message := version + " is " + action
		c.String(consts.StatusOK, message)
	})
	h.Spin()
}


Refer to the example for more detailed examples.

Note

Use anonymous function or decorator to register routes

When register route with anonymous function or decorator, if we use RequestContext.HandlerName() to get the handler name, we will get the wrong name.

You need to use the GETEX, POSTEX, PUTEX, DELETEEX, HEADEX, AnyEX, HandleEX methods provided by Hertz and manually pass in the handler name to register the route. use app.GetHandlerName to get the handler name.

Sample Code:

package main

import (
	"context"
	"github.com/cloudwego/hertz/pkg/app"
	"github.com/cloudwego/hertz/pkg/app/server"
	"github.com/cloudwego/hertz/pkg/protocol/consts"
)

func main() {
	h := server.Default()
	h.AnyEX("/ping", func(c context.Context, ctx *app.RequestContext) {
		ctx.String(consts.StatusOK, app.GetHandlerName(ctx.Handler()))
	}, "ping_handler")
	h.Spin()
}

Get route info

Hertz provides Routes to get the registered route information.

Route information struct:

// RouteInfo represents a request route's specification which contains method and path and its handler.
type RouteInfo struct {
	Method      string   // http method
	Path        string   // url path
	Handler     string   // handler name
	HandlerFunc app.HandlerFunc
}

// RoutesInfo defines a RouteInfo array.
type RoutesInfo []RouteInfo

Sample Code:

package main

import (
	"context"
	"github.com/cloudwego/hertz/pkg/app"
	"github.com/cloudwego/hertz/pkg/app/server"
	"github.com/cloudwego/hertz/pkg/common/hlog"
	"github.com/cloudwego/hertz/pkg/common/utils"
	"github.com/cloudwego/hertz/pkg/protocol/consts"
)

func main() {
	h := server.Default()
	h.GET("/ping", func(c context.Context, ctx *app.RequestContext) {
		ctx.JSON(consts.StatusOK, utils.H{"ping": "pong"})
	})
	routeInfo := h.Routes()
	hlog.Info(routeInfo)
	h.Spin()
}

NoRoute And NoMethod

Hertz provides NoRoute and NoMethod methods for global handling of HTTP 404 and 405 requests. Use NoMethod in conjunction with WithHandleMethodNotAllowed.

Sample Code:

package main

import (
	"context"
	"github.com/cloudwego/hertz/pkg/app"
	"github.com/cloudwego/hertz/pkg/app/server"
	"github.com/cloudwego/hertz/pkg/common/utils"
	"github.com/cloudwego/hertz/pkg/protocol/consts"
)

func main() {
	h := server.Default(server.WithHandleMethodNotAllowed(true))
	h.POST("/ping", func(c context.Context, ctx *app.RequestContext) {
		ctx.JSON(consts.StatusOK, utils.H{"ping": "pong"})
	})
	// set NoRoute handler
	h.NoRoute(func(c context.Context, ctx *app.RequestContext) {
		ctx.String(consts.StatusOK, "no route")
	})
	// set NoMethod handler
	h.NoMethod(func(c context.Context, ctx *app.RequestContext) {
		ctx.String(consts.StatusOK, "no method")
	})

	h.Spin()
}