Question: How Do I Return HTML Web API?

Should I return 500 API?

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 is bad request in Web API?

The HyperText Transfer Protocol (HTTP) 400 Bad Request response status code indicates that the server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).

What is return OK in Web API?

For all other return types, Web API uses a media formatter to serialize the return value. Web API writes the serialized value into the response body. The response status code is 200 (OK). … Web API uses the Accept header in the request to choose the formatter.

How do I fix an API error?

To fix the API call for those two situations, make sure that the credentials you are using have the access-level required by the endpoint, or that the access token has the correct permissions. A less common reason we might see this error is if we’re not explicit about the Accept header value.

What is REST API example?

An application implementing a RESTful API will define one or more URL endpoints with a domain, port, path, and/or querystring — for example, https://mydomain/user/123?format=json .

What does API error mean?

If you get an ‘API Error’ message, it means something went wrong with the API request, maybe due to a missing parameter or module. API (Application Programming Interface) requests are messages that your Core web application uses to interact with our web servers.


REST or RESTful API design (Representational State Transfer) is designed to take advantage of existing protocols. While REST can be used over nearly any protocol, it usually takes advantage of HTTP when used for Web APIs. … REST API Design was defined by Dr. Roy Fielding in his 2000 doctorate dissertation.

Can Web API return HTML?

. Net Web API returns html contentIn our webmthod we just need to add an attribute [Produces(“text/html”)] , This attribute indicates that the output will be in html not a simple string.If you want to understand the difference between with and without [Produces(“text/html”)] attribute, here are two different outputs.More items…

How do I return error code in Web API?

You can use the CreateErrorResponse extension method in your Web API controller method to return meaningful error codes and error messages. Note that the CreateErrorResponse method creates an HttpError object and then wraps it inside an HttpResponseMessage object.

How do I return JSON in Web API?

Let’s explore them:Change the default formatter for Accept: text/html to return JSON. … Change the default formatter for Accept: text/html to return JSON, and also return a valid Content-Type: application/json header. … Completely remove the XML formatter, forcing ASP.NET Web API to return JSON by default.

What is the difference between Web API and REST API?

While Web API in the time of Web 1.0 was synonymous with SOAP-based web services, today in Web 2.0, the term SOAP is edging towards REST-style web resources….Differences between REST and SOAP APIs.REST APISOAP APIMore secure since it boasts SSL and HTTPSIt only features SSL6 more rows•Sep 14, 2020

What is the biggest disadvantage of other return types in Web API?

What is the disadvantage of “Other Return Types” in Web API? Ans. The main disadvantage of this approach is that you cannot directly return an error code like 404 error.

What is Web API for beginners?

ASP.NET Web API is a framework for building HTTP services that can be accessed from any client including browsers and mobile devices. It is an ideal platform for building RESTful applications on the . … These tutorials are designed for beginners and professionals who want to learn Web API step-by-step.

How do I debug REST API?

Debugging REST applicationsCheck the HTTP response code. Commonly used response codes include the following: 200. The request was successful. … Check the response message in the HTTP header for additional information.Check the log files for any relevant messages. Messages might appear in the following files: $COLLATION_HOME/log/tomcat.

How do I debug an API?

Debugging an API requestDownload and install Postman. This free App will let you simulate requests to the API.In Postman, set up the same request you’re doing in your code by setting the endpoint, http method, and body/params. … Click on “Generate Code” and select cURL from the list.

How do I return a web API view?

So, if you want to return a View you need to use the simple ol’ Controller . The WebApi “way” is like a webservice where you exchange data with another service (returning JSON or XML to that service, not a View). So whenever you want to return a webpage ( View ) for a user you don’t use the Web API.

How do you handle API errors?

What Are Good API Errors?Good API errors differentiate client and server errors. … Good API errors use status codes appropriately. … Tip 1: Stick with well-known codes. … Tip 2: Avoid codes you don’t understand. … Tip 3: Provide the right number of errors. … Tip 4: Roll up to the most relevant error. … Tip 5: Explain what went wrong.More items…•

When should HTTP 400 be returned?

400 Bad Request: The request cannot be fulfilled due to bad syntax. In this case, your client sent you an XML payload that had an invalid zip code, which is a form of invalid syntax; therefore, sending a 400 Bad Request is an appropriate error code to return in this situation.

How do you handle API failure?

3.1. The simplest way we handle errors is to respond with an appropriate status code. Some common response codes include: 400 Bad Request — Client sent an invalid request — such as lacking required request body or parameter. 401 Unauthorized — Client failed to authenticate with the server.

Is Web API a Web service?

A Web API is a development in Web services where emphasis has been moving to simpler representational state transfer (REST) based communications. Restful APIs do not require XML-based Web service protocols (SOAP and WSDL) to support their interfaces.

What are API codes?

An API is a set of programming code that enables data transmission between one software product and another. It also contains the terms of this data exchange.

What does API mean?

application programming interfaceAPI stands for application programming interface. This is a concept in software technology that essentially refers to how multiple applications can interact with and obtain data from one another.

How do I return a web API list?

Web API: How To Return List Of Custom Type (JSON)In the Templates pane, select Installed Templates and expand visual C# node and select web. In the list of project Templates, select ASP.NET Web Application and Click OK. … In the new ASP.NET Project dialog, select Web API and Click Ok.We got StudentApp (our Application Name) application with all needed files.

What is Web API example?

The ASP.NET Web API is an extensible framework for building HTTP based services that can be accessed in different applications on different platforms such as web, windows, mobile etc. It works more or less the same way as ASP.NET MVC web application except that it sends data as a response instead of html view.