Jooby Status Codes Overview

Jooby is a web framework for building applications in Java. One important aspect of web applications is understanding HTTP status codes, which are responses from the server indicating the outcome of a client's request. This article provides a comprehensive overview of key points related to status codes in Jooby.

What are HTTP Status Codes?

• HTTP status codes are three-digit numbers sent by the server to indicate the result of a client's request.
• They help clients understand if their request was successful, if there was an error, or if further action is needed.

Common Status Code Categories

1. Informational (100-199)
   • Indicates that the request was received and is being processed.
   • Example: 100 Continue
2. Successful (200-299)
   • Indicates that the request was successfully received, understood, and accepted.
   • Example: 200 OK - The request has succeeded.
3. Redirection (300-399)
   • Indicates that the client must take additional action to complete the request.
   • Example: 301 Moved Permanently - The resource has been permanently moved to a new URL.
4. Client Error (400-499)
   • Indicates that the client seems to have made an error.
   • Example: 404 Not Found - The requested resource could not be found.
5. Server Error (500-599)
   • Indicates that the server failed to fulfill a valid request.
   • Example: 500 Internal Server Error - The server encountered an unexpected condition.

Using Status Codes in Jooby

In Jooby, you can set the response status code easily in your routes.

Example Code

get("/hello", ctx -> {
    ctx.setResponseCode(200); // Sets the status code to 200 OK
    return "Hello, World!";
});

get("/not-found", ctx -> {
    ctx.setResponseCode(404); // Sets the status code to 404 Not Found
    return "Page not found!";
});

Conclusion

Understanding and using HTTP status codes correctly is crucial for building robust web applications. Jooby simplifies the management of these codes, enabling effective communication with clients regarding the results of their requests. By categorizing responses, developers can handle various scenarios and enhance the overall user experience.