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Error handling.

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This commit is contained in:
Lyle Mantooth 2023-05-13 16:24:05 -04:00
parent a9d5459cb4
commit e3946c8129
Signed by: IslandUsurper
GPG key ID: 6DB52EAE123A5789
3 changed files with 181 additions and 9 deletions
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163
Cargo.lock generated
View file

@ -2,12 +2,42 @@
# It is not intended for manual editing.
version = 3
[[package]]
name = "addr2line"
version = "0.19.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a76fd60b23679b7d19bd066031410fb7e458ccc5e958eb5c325888ce4baedc97"
dependencies = [
"gimli",
]
[[package]]
name = "adler"
version = "1.0.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
[[package]]
name = "autocfg"
version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
[[package]]
name = "backtrace"
version = "0.3.67"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "233d376d6d185f2a3093e58f283f60f880315b6c60075b01f36b3b85154564ca"
dependencies = [
"addr2line",
"cc",
"cfg-if",
"libc",
"miniz_oxide",
"object",
"rustc-demangle",
]
[[package]]
name = "base64"
version = "0.21.0"
@ -36,6 +66,7 @@ checksum = "89b2fd2a0dcf38d7971e2194b6b6eebab45ae01067456a7fd93d5547a61b70be"
name = "catscii"
version = "0.1.0"
dependencies = [
"color-eyre",
"reqwest",
"serde",
"tokio",
@ -53,6 +84,33 @@ version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
[[package]]
name = "color-eyre"
version = "0.6.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5a667583cca8c4f8436db8de46ea8233c42a7d9ae424a82d338f2e4675229204"
dependencies = [
"backtrace",
"color-spantrace",
"eyre",
"indenter",
"once_cell",
"owo-colors",
"tracing-error",
]
[[package]]
name = "color-spantrace"
version = "0.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1ba75b3d9449ecdccb27ecbc479fdc0b87fa2dd43d2f8298f9bf0e59aacc8dce"
dependencies = [
"once_cell",
"owo-colors",
"tracing-core",
"tracing-error",
]
[[package]]
name = "core-foundation"
version = "0.9.3"
@ -99,6 +157,16 @@ dependencies = [
"libc",
]
[[package]]
name = "eyre"
version = "0.6.8"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4c2b6b5a29c02cdc822728b7d7b8ae1bab3e3b05d44522770ddd49722eeac7eb"
dependencies = [
"indenter",
"once_cell",
]
[[package]]
name = "fastrand"
version = "1.9.0"
@ -177,6 +245,12 @@ dependencies = [
"pin-utils",
]
[[package]]
name = "gimli"
version = "0.27.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ad0a93d233ebf96623465aad4046a8d3aa4da22d4f4beba5388838c8a434bbb4"
[[package]]
name = "h2"
version = "0.3.19"
@ -298,6 +372,12 @@ dependencies = [
"unicode-normalization",
]
[[package]]
name = "indenter"
version = "0.3.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ce23b50ad8242c51a442f3ff322d56b02f08852c77e4c0b4d3fd684abc89c683"
[[package]]
name = "indexmap"
version = "1.9.3"
@ -386,12 +466,27 @@ dependencies = [
"cfg-if",
]
[[package]]
name = "memchr"
version = "2.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
[[package]]
name = "mime"
version = "0.3.17"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
[[package]]
name = "miniz_oxide"
version = "0.6.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b275950c28b37e794e8c55d88aeb5e139d0ce23fdbbeda68f8d7174abdf9e8fa"
dependencies = [
"adler",
]
[[package]]
name = "mio"
version = "0.8.6"
@ -432,6 +527,15 @@ dependencies = [
"libc",
]
[[package]]
name = "object"
version = "0.30.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ea86265d3d3dcb6a27fc51bd29a4bf387fae9d2986b823079d4986af253eb439"
dependencies = [
"memchr",
]
[[package]]
name = "once_cell"
version = "1.17.1"
@ -482,6 +586,12 @@ dependencies = [
"vcpkg",
]
[[package]]
name = "owo-colors"
version = "3.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c1b04fb49957986fdce4d6ee7a65027d55d4b6d2265e5848bbb507b58ccfdb6f"
[[package]]
name = "parking_lot"
version = "0.12.1"
@ -602,6 +712,12 @@ dependencies = [
"winreg",
]
[[package]]
name = "rustc-demangle"
version = "0.1.23"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d626bb9dae77e28219937af045c257c28bfd3f69333c512553507f5f9798cb76"
[[package]]
name = "rustix"
version = "0.37.19"
@ -703,6 +819,15 @@ dependencies = [
"serde",
]
[[package]]
name = "sharded-slab"
version = "0.1.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "900fba806f70c630b0a382d0d825e17a0f19fcd059a2ade1ff237bcddf446b31"
dependencies = [
"lazy_static",
]
[[package]]
name = "signal-hook-registry"
version = "1.4.1"
@ -761,6 +886,16 @@ dependencies = [
"windows-sys 0.45.0",
]
[[package]]
name = "thread_local"
version = "1.1.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3fdd6f064ccff2d6567adcb3873ca630700f00b5ad3f060c25b5dcfd9a4ce152"
dependencies = [
"cfg-if",
"once_cell",
]
[[package]]
name = "tinyvec"
version = "1.6.0"
@ -854,6 +989,28 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0955b8137a1df6f1a2e9a37d8a6656291ff0297c1a97c24e0d8425fe2312f79a"
dependencies = [
"once_cell",
"valuable",
]
[[package]]
name = "tracing-error"
version = "0.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d686ec1c0f384b1277f097b2f279a2ecc11afe8c133c1aabf036a27cb4cd206e"
dependencies = [
"tracing",
"tracing-subscriber",
]
[[package]]
name = "tracing-subscriber"
version = "0.3.17"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "30a651bc37f915e81f087d86e62a18eec5f79550c7faff886f7090b4ea757c77"
dependencies = [
"sharded-slab",
"thread_local",
"tracing-core",
]
[[package]]
@ -894,6 +1051,12 @@ dependencies = [
"percent-encoding",
]
[[package]]
name = "valuable"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
[[package]]
name = "vcpkg"
version = "0.2.15"

1
Cargo.toml
View file

@ -5,6 +5,7 @@ authors = ["Amos Wenger <amos@fasterthanli.me>"]
edition = "2018"
[dependencies]
color-eyre = "0.6"
reqwest = { version = "0.11", features = ["json"] }
serde = { version = "1", features = ["derive"] }
tokio = { version = "1", features = ["full"] }

26
src/main.rs
View file

@ -2,11 +2,18 @@ use serde::Deserialize;
#[tokio::main]
async fn main() {
let res = reqwest::get("https://api.thecatapi.com/v1/images/search")
.await
.unwrap();
let url = get_cat_image_url().await.unwrap();
println!("The image is at {}", url);
}
async fn get_cat_image_url() -> color_eyre::Result<String> {
let api_url = "https://api.thecatapi.com/v1/images/search";
let res = reqwest::get(api_url).await?;
if !res.status().is_success() {
panic!("Request failed with HTTP {}", res.status());
return Err(color_eyre::eyre::eyre!(
"The Cat API returned HTTP {}",
res.status()
));
}
#[derive(Deserialize)]
@ -14,9 +21,10 @@ async fn main() {
url: String,
}
let images: Vec<CatImage> = res.json().await.unwrap();
let image = images
.first()
.expect("the cat API should return at least one image");
println!("The image is at {}", image.url);
let mut images: Vec<CatImage> = res.json().await?;
if let Some(image) = images.pop() {
Ok(image.url)
} else {
Err(color_eyre::eyre::eyre!("The Cat API returned no images"))
}
}