/
middleware.go
73 lines (62 loc) · 2.07 KB
/
middleware.go
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package goweb
import (
"fmt"
"net/http"
)
// Middleware contains a set of Handler functions that will
// be applied in the same order in which they were
// registered.
type Middleware struct {
chain []Handler
engine *Engine
}
func (m *Middleware) apply(handler Handler) Handler {
return func(c *Context) Responder {
for _, mw := range m.chain {
if res := mw(c); res != nil {
return res
}
}
return handler(c)
}
}
// Middleware returns a new middleware chain.
func (m *Middleware) Middleware(middleware ...Handler) *Middleware {
return &Middleware{
chain: append(m.chain, middleware...),
engine: m.engine,
}
}
// GET registers a route for method GET.
func (m *Middleware) GET(path string, handler Handler) {
m.engine.GET(path, m.apply(handler))
}
// PUT registers a route for method PUT.
func (m *Middleware) PUT(path string, handler Handler) {
m.engine.PUT(path, m.apply(handler))
}
// POST registers a route for method POST.
func (m *Middleware) POST(path string, handler Handler) {
m.engine.POST(path, m.apply(handler))
}
// PATCH registers a route for method PATCH.
func (m *Middleware) PATCH(path string, handler Handler) {
m.engine.PATCH(path, m.apply(handler))
}
// DELETE registers a route for method DELETE.
func (m *Middleware) DELETE(path string, handler Handler) {
m.engine.DELETE(path, m.apply(handler))
}
// HEAD registers a route for method HEAD.
func (m *Middleware) HEAD(path string, handler Handler) {
m.engine.HEAD(path, m.apply(handler))
}
// Resource creates multiple REST handlers from given interface.
func (m *Middleware) Resource(resourceName string, resource Resource) {
resourcePath := fmt.Sprintf("%s/{%s}", resourceName, resource.Identifier())
m.engine.registerRoute(http.MethodGet, resourceName, m.apply(resource.Index))
m.engine.registerRoute(http.MethodGet, resourcePath, m.apply(resource.Get))
m.engine.registerRoute(http.MethodPut, resourcePath, m.apply(resource.Put))
m.engine.registerRoute(http.MethodDelete, resourcePath, m.apply(resource.Delete))
m.engine.registerRoute(http.MethodPost, resourceName, m.apply(resource.Post))
}