{ "content": "

Understanding PUT-Requests<\/a><\/h1>

The PUT<\/a> method is a core component of the HTTP<\/a> protocol, specifically designed for CRUD<\/a> operations within a REST-API<\/a>. Its primary purpose is to update an existing resource or create a resource at a known URI<\/a>. When a client sends a PUT<\/a> request, it typically includes a complete JSON<\/a> or XML<\/a> representation of the resource in the request body.<\/p>

One of the most important concepts regarding this method is Idempotency<\/a>. As defined by MDN Web Docs<\/a>, an idempotent operation is one where multiple identical requests have the same effect as a single request. This contrasts with the POST<\/a> method, where repeated requests might result in the creation of duplicate records. If the server successfully updates a resource, it usually returns a 200 (OK) or 204 (No Content) status code. If the Server<\/a> successfully creates a new resource at the specified Endpoint<\/a>, a 201 (Created) response is expected, as detailed in the RFC 7231<\/a> standard.<\/p>

Developers must distinguish PUT<\/a> from the PATCH<\/a> method. While PUT<\/a> replaces the entire resource state, PATCH<\/a> is used for partial updates. For example, if a client only needs to change a user's email address without sending the full profile data, PATCH<\/a> is more efficient, whereas PUT<\/a> would require the entire user object to be sent to avoid accidental data loss or resetting fields to default values.<\/p>