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I again want to emphasize the importance of having a clean and updated documentation (If there is one thing you wanna
#SWAGGER EDITOR DESCRIPTION HEADER HOW TO#
I hope you now know how to setup Swagger UI for Go APIs, and hope you do this for your APIs going forward. Target named run, which generates the swagger docs before running the application.Ġ 08:12:24 Generate general API Info, search dir./Ġ 08:12:24 create docs.go at docs/docs.goĠ 08:12:24 create swagger.json at docs/swagger.jsonĠ 08:12:24 create swagger.yaml at docs/swagger.yaml The swag init command to be executed everytime we run the application. To automate this, we can setup a makefile and configure Often, wouldn’t it be nice if this is automated? Since this is something we’ll find ourselves doing The documentation get updated automatically? Unfortunately, no ? We’ll have to run the swag init command to regenerate the docs to reflect the updated API.
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Now, what happens when we update our APIs (Add a new one, modify the request/response of existing ones, etc)? Does On the execute button invokes the API and displays the response details (payload + headers).
Request with values generated based on the example values we provided earlier (We can edit it if required). There should be a Try it out button at the top right corner for each API, clicking this should display a In addition to viewing the API documentation, we can see an API in action by trying it out directly from the Swagger
Half of the page shows the swagger UI on the right half. You can just copy the contents of doc.json or doc.yaml and pasting it on the editor on the left Swagger also provides an option to visualize the swagger docs using the Swagger editor online. To run the app, navigate to your project directory, and run the following commands:
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The above code snippet shows our main method after adding the Swag annotations, and a route for swagger UI.įinally, once we are done with all the APIs, and it’s time take them for a spin. Create a new order with the input paylodįunc createOrder ( w http. The method definition, as you can see below. These annotations are nothing but comments before We start by adding a general description for the entire project by annotating our main method. Adding annotations in code General API info Serving the Swagger UI using the specs generated in the previous stepġ.Generating Swagger specs ( swagger.json and swagger.yaml).Let us divide this whole process of API documentation into 3 steps: This dependency is required in the docs.go file generated by swag, and we’ll see an error while
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The third command is to install template, a fork of Go’s text/template package. Http-swagger - This library helps to serve the Swagger UI using the docs generated by swag Swag - This library converts Go annotations to Swagger 2.0 docs (swagger.json/swagger.yaml), which is later used by The first two commands install swag and http-swagger respectively: Run the following commands from the commandline: Our first task is to install the libraries we are dependent on.
We will retain the same for this post, and build upon it byĪdding swagger-specific libraries and annotations. In our previous post on Go APIs, we used Go’s built-in net/http library in combination with Gorilla Mux for routing. To provide some comparisons between both. I will write another post on doing the same with go-swagger and try Starting point for documenting APIs in Go. However, I found Swaggo to be simple and hassle-free and can be a good Popular frameworks available for generating Swagger docs and UI (Looking at the number of stars on Github, go Swaggo and go-swagger are two of the most , and the changes are incorporated when the API doc is generated next. , updating/maintaining API documentation is a breeze - the developer just has to add/tweak annotations in the code Once setup, Swagger UI provides a convenient way for consumers to explore the API and play around with it.Īlso, APIs evolve over time and the documentation should reflect the changes accordingly (The number of bugs thatĪrise due to improper(or non-existent) communication of changes to APIs is just too damn high!). Without a clear documentation of APIs, consumers are going toįind it hard to do all of the above, which leads to a serious loss in developer productivity. Building an API is only half the job ? The other half is enablingĬlients to use, explore and test the API without too much hassle. Once we have our super-cool API ready, the next step is to share it with consumers and make it easy for them to Setup Swagger UI for our APIs using Swaggo. This post is intended as a follow-up, and explains how to generate swagger documentation and In a previous post - Go REST API, we saw how to build a simple Swagger UI setup for Go REST API using Swaggo Dec 1, 2019