Understanding Jooby's Send Methods

Jooby is a web framework that simplifies the process of building web applications in Java. One of its key features is the ability to send responses back to clients using various methods. This guide provides an overview of the send methods in Jooby.

Key Concepts

• Send Methods: Functions provided by Jooby to send different types of responses to clients.
• Response Types: Jooby supports various response types, including plain text, JSON, HTML, and more.

Main Send Methods

Jooby provides several methods to send responses, each tailored for specific needs:

send(InputStream stream)
Description: Sends data from an InputStream, suitable for large files.
Example:

get("/file", () -> send(new FileInputStream("largefile.zip")));

send(byte[] bytes)
Description: Sends raw bytes, useful for files or binary data.
Example:

get("/image", () -> send(Files.readAllBytes(Paths.get("image.png"))));

send(Object object)
Description: Automatically converts an object to JSON and sends it as a response.
Example:

get("/json", () -> send(new User("John", "Doe")));

send(String message)
Description: Sends a plain text response to the client.
Example:

get("/text", () -> send("Hello, World!"));

Additional Features

• Custom Headers: Set custom headers in your response.

Status Codes: Specify HTTP status codes to enhance your API's robustness.
Example with status:

get("/error", () -> {
    response.status(404);
    return send("Not Found");
});

Conclusion

Jooby's send methods provide a straightforward way to handle various response types. By using these methods, developers can easily create APIs that respond with text, JSON, binary data, or files, thereby enhancing the client-server interaction in their web applications.