Question 1

How do I send a JSON POST request with Http.fs?

Accepted Answer

Use the BodyString method with a JSON string and set the ContentType header to 'application/json'. For example, in the request builder, add |> Request.bodyString "{\"key\":\"value\"}" and |> Request.setHeader (ContentType "application/json"). The library handles encoding and headers fluently.

Question 2

Http.fs vs F# HttpClient: which is better for my project?

Accepted Answer

Http.fs offers a functional, immutable API ideal for F# developers preferring composition and no side effects, while F# HttpClient is more imperative and closer to .NET standards. Choose Http.fs for functional style and abstraction, or HttpClient for simplicity and broader .NET compatibility.

Question 3

How to handle errors and exceptions in Http.fs?

Accepted Answer

Errors are handled by inspecting the response status code, as Http.fs doesn't throw exceptions for non-2xx responses by default. Use Hopac's error handling or check response.StatusCode to manage failures programmatically, requiring manual error logic for robustness.

Question 4

Does Http.fs support HTTP/2 or advanced protocols?

Accepted Answer

Http.fs uses .NET's HttpClient under the hood, so it may support HTTP/2 if configured, but the library doesn't provide explicit APIs for HTTP/2 features. For advanced protocols, you might need to access HttpClient directly, limiting built-in functionality.

Question 5

How to download large files without buffering in Http.fs?

Accepted Answer

Use the getResponseStream function to access the response stream directly, then copy it to a file or process it incrementally. The README shows an example with FileStream to avoid memory overhead, ensuring efficient handling of large downloads.

Question 6

Can I use Http.fs with standard async/await instead of Hopac?

Accepted Answer

Http.fs is built on Hopac and uses Job for asynchronous operations, so direct async/await integration isn't straightforward. You can convert Jobs to async tasks, but it's designed for Hopac, making Hopac knowledge essential for optimal use.

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