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use std::{env, process};
use reqwest::{Client, Response};
use url::Url;
#[tokio::main]
async fn main() {
// Get the command line arguments
let args: Vec<String> = env::args().collect();
// Ensure a URL is provided
if args.len() != 2 {
eprintln!("USAGE: {} <url>", args[0]);
process::exit(1);
}
let url = &args[1];
// Validate the URL
if Url::parse(url).is_err() {
eprintln!("Error: The provided URL '{}' is not valid.", url);
process::exit(1);
}
// Perform the TRACE request
match perform_trace(url).await {
Ok(response) => {
println!("{}", response);
process::exit(0);
}
Err(e) => {
eprintln!("TRACE request to '{}' failed: {}", url, e);
process::exit(1);
}
}
}
async fn perform_trace(url: &str) -> Result<String, String> {
let client = Client::new();
// Perform the TRACE request
let response = client
.request(reqwest::Method::TRACE, url)
.send()
.await
.map_err(|e| format!("Failed to send TRACE request: {}", e))?;
// Ensure the response was successful
if response.status().is_success() {
format_trace_response(response).await
} else {
Err(format!(
"Received non-success status code: {}",
response.status()
))
}
}
async fn format_trace_response(response: Response) -> Result<String, String> {
let version = match response.version() {
reqwest::Version::HTTP_09 => "0.9",
reqwest::Version::HTTP_10 => "1.0",
reqwest::Version::HTTP_11 => "1.1",
reqwest::Version::HTTP_2 => "2",
reqwest::Version::HTTP_3 => "3",
_ => "Unknown",
};
let status_line = format!("HTTP/{} {} {}",
version,
response.status().as_u16(),
response.status().canonical_reason().unwrap_or(""));
let headers = response
.headers()
.iter()
.map(|(key, value)| format!("{}: {}", key, value.to_str().unwrap_or("<invalid UTF-8>")))
.collect::<Vec<_>>()
.join("\n");
let body = response
.text()
.await
.map_err(|e| format!("Failed to read response body: {}", e))?;
Ok(format!("{}\n{}\n\n{}", status_line, headers, body))
}
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