ExpressJS HTTP Methods

• ExpressJS HTTP Methods refer to the different types of HTTP requests that can be handled by an Express application.
• Express supports various HTTP methods, including GET, POST, PUT, DELETE, PATCH, HEAD, and more.
• Each HTTP method has a specific purpose and is used to perform different actions on the server.

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1. Overview

ExpressJS HTTP Methods define the actions that can be performed on resources in an Express application. They correspond to the standard HTTP methods defined in the HTTP specification.

Common HTTP methods used in Express applications include:

• GET: Retrieves data from the server.
• POST: Submits data to the server to create a new resource.
• PUT: Updates an existing resource on the server.
• DELETE: Removes a resource from the server.
• PATCH: Partially updates a resource on the server.
• HEAD: Retrieves metadata about a resource without fetching the resource itself.

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2. Example

Here's an example demonstrating the use of different HTTP methods in Express:

// GET request handler
app.get('/users', (req, res) => {
    // Retrieve and send user data
});

// POST request handler
app.post('/users', (req, res) => {
    // Create a new user based on request data
});

// PUT request handler
app.put('/users/:id', (req, res) => {
    // Update user data based on request data
});

// DELETE request handler
app.delete('/users/:id', (req, res) => {
    // Delete a user based on ID
});

In this example, different HTTP methods are used to handle various actions related to user resources, such as retrieving, creating, updating, and deleting users.

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3. Handling Other HTTP Methods

In addition to the commonly used HTTP methods mentioned above, Express also supports handling other HTTP methods such as OPTIONS, TRACE, CONNECT, and TRACE.

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4. Conclusion

ExpressJS HTTP Methods provide a flexible and powerful way to handle different types of HTTP requests in an Express application. By defining route handlers for specific HTTP methods, developers can create robust APIs and web applications that interact with clients effectively.