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32 lines
761 B
Rust
32 lines
761 B
Rust
#![warn(rust_2018_idioms)]
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#![allow(elided_lifetimes_in_paths)]
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use std::error::Error;
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use std::io;
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fn http_get_main(url: &str) -> Result<(), Box<dyn Error>> {
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// Send the HTTP request and get a response.
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let mut response = reqwest::blocking::get(url)?;
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if !response.status().is_success() {
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Err(format!("{}", response.status()))?;
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}
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// Read the response body and write it to stdout.
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let stdout = io::stdout();
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io::copy(&mut response, &mut stdout.lock())?;
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Ok(())
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}
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fn main() {
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let args: Vec<String> = std::env::args().collect();
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if args.len() != 2 {
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eprintln!("usage: http-get URL");
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return;
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}
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if let Err(err) = http_get_main(&args[1]) {
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eprintln!("error: {}", err);
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}
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}
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