Which of the following HTTP method should be used to fetch resource using RESTful web service?

The HTTP GET method is used to **read** (or retrieve) a representation of a resource. In the “happy” (or non-error) path, GET returns a representation in XML or JSON and an HTTP response code of 200 (OK). In an error case, it most often returns a 404 (NOT FOUND) or 400 (BAD REQUEST).

What method does a Web API use to ensure that a request is valid?

Since a GET request is only requesting data and not modifying any resources, it’s considered a safe and idempotent method.

• Testing an API with GET requests.
• Testing an API with POST requests.
• Testing an API with PUT requests.
• Testing an API with PATCH requests.
• Testing an API with DELETE requests.

What are the HTTP methods supported by rest?

The following subset of HTTP methods are supported for the REST BC:

• GET. The GET method retrieves specific information from the server as identified by the request URI.
• PUT. The PUT method requests that the message body sent with the request be stored under the location provided in the HTTP message.
• DELETE.
• POST.
• HEAD.

Is HTTP required for REST?

It’s important to remember that the use of HTTP is not required for a RESTful system. It just so happens that HTTP is a good starting because it exhibits many RESTful qualities. Let’s take a closer look at some of the qualities that make HTTP a RESTful protocol.

Does REST use HTTP?

This is because REST is an architectural style, while SOAP is a protocol. REST is not a standard in itself, but RESTful implementations make use of standards, such as HTTP, URI, JSON, and XML.

What is the client-side error status for a REST API?

In particular, a REST API must not be compromised in an effort to accommodate less sophisticated HTTP clients. 400 is the generic client-side error status, used when no other 4xx error code is appropriate. For errors in the 4xx category, the response body may contain a document describing the client’s error (unless the request method was HEAD).

What does it mean when a REST API is 400?

In particular, a REST API must not be compromised in an effort to accommodate less sophisticated HTTP clients. 400 (Bad Request) may be used to indicate nonspecific failure 400 is the generic client-side error status, used when no other 4xx error code is appropriate.

Which should be used to indicate API malfunction 500?

500 (Internal Server Error) should be used to indicate API malfunction 500 is the generic REST API error response. Most web frameworks automatically respond with this response status code whenever they execute some request handler code that raises an exception.

What are the rules for HTTP response status codes?

Always make proper use of the HTTP response status codes as specified by the rules in this section. In particular, a REST API must not be compromised in an effort to accommodate less sophisticated HTTP clients. 400 is the generic client-side error status, used when no other 4xx error code is appropriate.