// ComponentMiddleware - Creates a middleware that sets given component in ctx.
func ComponentMiddleware(c *components.Component) middlewares.Handler {
return middlewares.ToHandler(func(ctx context.Context, w http.ResponseWriter, r *http.Request, next xhandler.HandlerC) {
if c != nil {
ctx = components.NewContext(ctx, c)
}
next.ServeHTTPC(ctx, w, r)
})
}
// UnmarshalFromBody - Unmarshals component from request bodyCompileInContext() on certain methods.
// Stores result in context to be retrieved with `components.FromContext`.
func UnmarshalFromBody(methods ...string) middlewares.Handler {
return middlewares.ToHandler(func(ctx context.Context, w http.ResponseWriter, r *http.Request, next xhandler.HandlerC) {
if !helpers.Contain(methods, r.Method) {
next.ServeHTTPC(ctx, w, r)
return
}
c := new(components.Component)
err := json.NewDecoder(r.Body).Decode(c)
if err != nil {
helpers.WriteError(w, r, http.StatusBadRequest, err.Error())
return
}
ctx = components.NewContext(ctx, c)
next.ServeHTTPC(ctx, w, r)
})
}
// UnmarshalFromQuery - Unmarshals component from `json` query on certain methods.
// Stores result in context to be retrieved with `components.FromContext`.
func UnmarshalFromQuery(methods ...string) middlewares.Handler {
return middlewares.ToHandler(func(ctx context.Context, w http.ResponseWriter, r *http.Request, next xhandler.HandlerC) {
if len(methods) != 0 && !helpers.Contain(methods, r.Method) {
next.ServeHTTPC(ctx, w, r)
return
}
// Read component from request
c, err := readComponent(r)
if err != nil {
helpers.WriteError(w, r, http.StatusBadRequest, err.Error())
return
}
// Create a context with component and move to next handler
ctx = components.NewContext(ctx, c)
next.ServeHTTPC(ctx, w, r)
})
}