echo/website/content/guide/request.md

title	menu
Request	side parent weight guide 5

Handler path

Context#Path() returns the registered path for the handler, it can be used in the middleware for logging purpose.

Example

e.Use(func(c *echo.Context) error {
    println(c.Path()) // Prints `/users/:name`
    return nil
})
e.Get("/users/:name", func(c *echo.Context) error) {
    return c.String(http.StatusOK, name)
})

golang.org/x/net/context

echo.Context embeds context.Context interface, so all it's properties are available right from echo.Context.

Example

e.Get("/users/:name", func(c *echo.Context) error) {
    c.Context = context.WithValue(nil, "key", "val")
    // Pass it down...
    // Use it...
    println(c.Value("key"))
    return c.String(http.StatusOK, name)
})

Path parameter

Path parameter can be retrieved either by name Context#Param(name string) string or by index Context#P(i int) string. Getting parameter by index gives a slightly better performance.

Example

e.Get("/users/:name", func(c *echo.Context) error {
	// By name
	name := c.Param("name")

	// By index
	name := c.P(0)

	return c.String(http.StatusOK, name)
})

$ curl http://localhost:1323/users/joe

Query parameter

Query parameter can be retrieved by name using Context#Query(name string).

Example

e.Get("/users", func(c *echo.Context) error {
	name := c.Query("name")
	return c.String(http.StatusOK, name)
})

$ curl -G -d "name=joe" http://localhost:1323/users

Form parameter

Form parameter can be retrieved by name using Context#Form(name string).

Example

e.Post("/users", func(c *echo.Context) error {
	name := c.Form("name")
	return c.String(http.StatusOK, name)
})

$ curl -d "name=joe" http://localhost:1323/users