Which function in Fiber makes the logic similar to func (c *Context) Set(key string, value any) in gin ?

Question content

Which function in Fiber makes the logic similar to func (c *Context) Set(key string, value any) in gin?

I'm looking for a function that writes key/value pairs in a specific context but I didn't find it, please tell me if there is such a chance

Correct answer

Looks like (*ctx).locals is what you want.

The following content is copied from the official document:

locals

A way to store variables that are scoped to the request, so they are only available to routes that match the request.

sign

func (c *ctx) locals(key interface{}, value ...interface{}) interface{}

Example

app.Use(func(c *fiber.Ctx) error {
  c.Locals("user", "admin")
  return c.Next()
})

app.Get("/admin", func(c *fiber.Ctx) error {
  if c.Locals("user") == "admin" {
    return c.Status(fiber.StatusOK).SendString("Welcome, admin!")
  }
  return c.SendStatus(fiber.StatusForbidden)
})

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