This is extremely important for critical enterprise applications. Very simply HA is a non-functional quality attribute for a system that allows its services to be accessible even when one or more of its components have failed. Lets first start in understanding what High Availability (HA) means. Web apps do not require a APIM in front, which is why we cannot blindly use the Microsoft reference architecture. This is the key difference to a web app, the presence of Azure APIM. I will implement the API as a ASP.Net Core app for this post but the concept will apply to function apps in consumption tier.Ī highly recommended way and adopted by most enterprises is to expose your APIs through an Azure API Management (APIM) Gateway.Ī typical API architecture will look like: Often the examples shown don’t take into account the security aspects in conjunction with HA.ĪPI apps in Azure App Service can be deployed as an ASP.Net Core application or as a function app. Web applications but my focus is on API apps which is different. Microsoft has a published reference architecture for The deployments to Azure can be done from the Azure portal, I have used Azure Cli wherever possible. My code examples will be in C#/.Net core as that is the language I am most familiar with. Of course there are more operations available on the API’s but these work similar.In this post I will delve into designing and building Highly Available APIs hosted on Azure App Service.Īpp Service is a very popular PAAS service in Azure that is used to host web applications, REST APIs and mobile backends on either Windows or Linux based server environments.Īpp Service is ultra developer friendly and at the same time offers very robust scalability and security features suitable even for large Enterprises. In this blog post I only showed how to upload a file with the Files API and how to use the XSLT API. In the Body select the raw radio button and then enter the XML message that you want to transform.Ĭlick on the Send button to transform the message. Also specify the Content-Type and what you want to Accept. In the Header enter “Ocp-Apim-Subscription-Key” as the key name and your Primary key as the value. Select POST and enter: in the Request URL. In the Body select the form-data radio button and then select the file that you want to upload.Ĭlick on the Send button to upload the file. Use a tool like Postman to call the Files API. When you are finished creating the XSLT transformation, you upload the XSLT file into your integration account. You can create a XSLT map by using the Visual Studio Enterprise Integration SDK or for example another XSLT tool like MapForce and XMLSpy from Altova. You can upload up to 10 XSLT files without any costs! On the Register page enter your details and then click on the Register button.Ĭopy the Primary key value from Your subscription details.Įvery API request you make to the Web API must be authenticated by including an Authorization Header with your API Key.Ĭlick on Files API in the Documentation menu to see the operations of the Files API. Then you get secure and optimized cloud storage for free that is only accessible by yourself. The only thing what you have to do is to create account on. The API can also be used to execute BizTalk maps as long you don’t have Custom Functoids. Therefore I created an XSLT API that you can use to transform XML messages with XSLT. This time I wanted to create something else because nowadays I’m focusing more and more on functionality in Azure. I’d like to build tools for other developers and in the past I created some small tools for BizTalk 2010 and BizTalk 2013 to test your maps.
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