The type of resource is determined by the URL of the request. The body of the request should contain a JSON object describing the resource to create. The object in the request body determines the initial state of the resource will be when it is created. Some resources require certain properties be provided when they are created, others can be created with an empty JSON object.
Sometimes resources are created that are meant to belong to another resource. For example, if applications must belong to a web site and someone wanted to create a new application then they would specify that relationship during the creation of the application as shown below.
There are two main methods to retrieve resources. The first method involves requesting a list of resources, the second method is when a single resource is requested. This resembles PUT, but the body contains a set of instructions describing how a resource currently residing on the server should be modified to produce a new version.
PATCH is neither safe nor idempotent. However, a PATCH request can be issued in such a way as to be idempotent, which also helps prevent bad outcomes from collisions between two PATCH requests on the same resource in a similar time frame.
Collisions from multiple PATCH requests may be more dangerous than PUT collisions because some patch formats need to operate from a known base-point or else they will corrupt the resource. Clients using this kind of patch application should use a conditional request such that the request will fail if the resource has been updated since the client last accessed the resource.
On successful deletion, return HTTP status OK along with a response body, perhaps the representation of the deleted item often demands too much bandwidth , or a wrapped response see Return Values below. As mentioned previously, usage statistics and measurements may be updated while still considering the service idempotent as long as no resource data is changed. Using POST for non-idempotent resource requests is recommended.
This, by some opinions, makes DELETE operations no longer idempotent, however, the end-state of the resource is the same. There are four HTTP methods that correspond to these actions, one for each, like so:. We can tell from the name of the action and, let's be real, the comment that this action is supposed to create a movie.
So we should use the POST verb on this action, like so:. However, there are a few other methods we could utilize if the need arises. Technically speaking, you could use either for the Create or Update scenarios, and in fact this is rather common.
The difference lies in the details. PUT is idempotent. What this means is that if you make the same request twice using PUT, with the same parameters both times, the second request will have no effect. This is why PUT is generally used for the Update scenario; calling Update more than once with the same parameters doesn't do anything more than the first call did. However, doing so is liable to cause a horde of angry server admins to show up at your desk and beat you with ethernet cables.
Don't say I didn't warn you. For that we need to create two different applications. If you are very much interested in seeing the HTTP Protocol a little more closely, then I hope this article will be gratifying. So, let's start our talking. HTTP is the protocol by which you are reading this article, you buy your book in Anazon. Let's think about the scenario when you have clicked on this article link to read it. A couple of operations has fired without your knowledge. What are the operations?
You have clicked on a link, your browser has formed a HTTP GET message with relevant information and made a request to the c-sharocorner. Now, the question is what does the request look? Ok, here we will get one overview that is a little over-simplified but very similar to the real one of the GET request. The simplest example is here. Now, I have already said that this might not be the exact request, because in the exact request there might be many header information to help the server for a better response.
Method : It defines the request type. Here the request type is GET. Obviously this URL is an arbitrary one and provided for our understanding. We are seeing that the HTTP version is 1. Ok, we have learned the meaning of the first line. Now let's go to the second line. The second line is nothing but one header information. The header name is Host.
In the HTTP request and response there might be n number of headers. The host header contains the server name. Ok, we will not go much deepper into the HTTP protocol to concentrate on our actual topic. Have a look at the following code. The Get action is implemented very simply, we are just sending a collection of strings to the client.
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