Add docs from gofiber/fiber@a42ddc1

Author: github-actions[bot]

docs/core/api/ctx.md

@@ -484,6 +484,54 @@ app.Get("/", func(c fiber.Ctx) error {
 })
 ```
 
+## End
+
+End immediately flushes the current response and closes the underlying connection.
+
+```go title="Signature"
+func (c fiber.Ctx) End() error
+```
+
+```go title="Example"
+app.Get("/", func(c fiber.Ctx) error {
+    c.SendString("Hello World!")
+    return c.End()
+})
+```
+
+:::caution
+Calling `c.End()` will disallow further writes to the underlying connection.
+:::
+
+End can be used to stop a middleware from modifying a response of a handler/other middleware down the method chain
+when they regain control after calling `c.Next()`.
+
+```go title="Example"
+// Error Logging/Responding middleware
+app.Use(func(c fiber.Ctx) error {
+    err := c.Next()
+  
+    // Log errors & write the error to the response
+    if err != nil {
+        log.Printf("Got error in middleware: %v", err)
+        return c.Writef("(got error %v)", err)
+    }
+
+    // No errors occured
+    return nil
+})
+
+// Handler with simulated error
+app.Get("/", func(c fiber.Ctx) error {
+    // Closes the connection instantly after writing from this handler
+    // and disallow further modification of its response
+    defer c.End()
+
+    c.SendString("Hello, ... I forgot what comes next!")
+    return errors.New("some error")
+})
+```
+
 ## Format
 
 Performs content-negotiation on the [Accept](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept) HTTP header. It uses [Accepts](ctx.md#accepts) to select a proper format from the supplied offers. A default handler can be provided by setting the `MediaType` to `"default"`. If no offers match and no default is provided, a 406 (Not Acceptable) response is sent. The Content-Type is automatically set when a handler is selected.

docs/core/whats_new.md

@@ -341,6 +341,7 @@ testConfig := fiber.TestConfig{
 - **String**: Similar to Express.js, converts a value to a string.
 - **ViewBind**: Binds data to a view, replacing the old `Bind` method.
 - **CBOR**: Introducing [CBOR](https://cbor.io/) binary encoding format for both request & response body. CBOR is a binary data serialization format which is both compact and efficient, making it ideal for use in web applications.
+- **End**: Similar to Express.js, immediately flushes the current response and closes the underlying connection.
 
 ### Removed Methods
 
@@ -403,6 +404,41 @@ app.Get("/sse", func(c fiber.Ctx) {
 
 You can find more details about this feature in [/docs/api/ctx.md](./api/ctx.md).
 
+### End
+
+In v3, we introduced a new method to match the Express.js API's `res.end()` method.
+
+```go
+func (c Ctx) End()
+```
+
+With this method, you can:
+
+- Stop middleware from controlling the connection after a handler further up the method chain
+  by immediately flushing the current response and closing the connection.
+- Use `return c.End()` as an alternative to `return nil`
+
+```go
+app.Use(func (c fiber.Ctx) error {
+    err := c.Next()
+    if err != nil {
+        log.Println("Got error: %v", err)
+        return c.SendString(err.Error()) // Will be unsuccessful since the response ended below
+    }
+    return nil
+})
+
+app.Get("/hello", func (c fiber.Ctx) error {
+    query := c.Query("name", "")
+    if query == "" {
+        c.SendString("You don't have a name?")
+        c.End() // Closes the underlying connection
+        return errors.New("No name provided")
+    }
+    return c.SendString("Hello, " + query + "!")
+})
+```
+
 ---
 
 ## 🌎 Client package