October 2019
Intermediate to advanced
444 pages
10h 37m
English
Content preview from Rust Programming Cookbook
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How it works...
actix-web uses an error trait to convert Rust errors into HttpResponses. This trait is automatically implemented for a range of default errors but only by responding with the default Internal Server Error message.
In step 1 and step 2, we are setting up custom errors so that we can return messages that are relevant to what the user is currently doing (or trying to do). As with other errors (see Chapter 5, Handling Errors and Other Results), we are using enums to provide an umbrella to match error variations to. Each of the variants is augmented with an attribute that provides a corresponding error message with a format string—an ability provided by the failure crate (https://crates.io/crates/failure). The message here is ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.