In the previous part of this series, we looked at creating our first API. But how do you determine which API is being invoked? This is accomplished with routing.
If you have a Products class your entry (end point) might look like this:
[Function(nameof(Products))]
public IActionResult Run(HttpTrigger(AuthorizationLevel.Anonymous,
"get", Route="products/{category}/{id: int}")]
HttpRequest req, string category, int id)
{
return new OkObjectResult(new {category, id});
}
Notice the routing property (“products/{category}/{id: int}” — this allows us to customize and restrict the arguments from the desired endpoint. The customer/user can now use the same endpoint for a variety of situations.
You can go further and restrict the type of the parameters, and even provide default values:
Route="products/{category:alpha}/{id: int?}")]
Here we are saying that the category must consist only of standard characters, and the id is optional.
Next up: Options
Note, this material is based on our book Programming APIs with C# and .NET from Packt by Jesse Liberty and Joseph Deluzen.
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I do agree with all of the concepts you have presented for your post. They’re really convincing and can certainly work. Nonetheless, the posts are too brief for beginners. May just you please prolong them a bit from subsequent time? Thanks for the post.
Great breakdown of routing in APIs, Jesse. I’ve been working on a small project recently and was struggling with how to structure my endpoints cleanly—your examples really clarified the concept for me. Do you have any tips for handling nested routes without making the code too messy?
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Great breakdown of routing in APIs, Jesse. I’ve been building a small project with Express and your explanation of how route parameters and query strings differ really cleared up some confusion I had about structuring endpoints. Do you have any tips for handling nested routes cleanly without making the code too messy?
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