commit ce7535fa9de5a7c36b5ba9daa47a387bb0223587
Author: Pierre HUBERT <pierre.git@communiquons.org>
Date:   Wed Mar 5 14:34:57 2025 +0100

    Parse request

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2a0038a
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new file mode 100644
index 0000000..4a89a6d
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..dbcc854
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "scep_req_parser"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+log = "0.4.26"
+env_logger = "0.11.6"
+clap = { version = "4.5.31", features = ["derive", "env"] }
+http = { version = "1.2.0" }
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\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..6a2e571
--- /dev/null
+++ b/README.md
@@ -0,0 +1,2 @@
+# SCEP requests parser
+https://www.rfc-editor.org/rfc/rfc8894.html
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..11bf567
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,74 @@
+use std::str::FromStr;
+use clap::Parser;
+
+/// Simple SCEP parser program
+#[derive(Parser, Debug)]
+#[command(version, about, long_about = None)]
+struct Args {
+    /// Name of the file containing the request (WITH HTTP headers)
+    #[arg(short, long)]
+    req_file: String,
+
+    /// Name of the file containing the response (WITH HTTP headers)
+    #[arg(short('R'), long)]
+    res_file: String,
+}
+
+/// Find a byte position in an array of bytes
+fn find_in_bytes(haystack: &[u8], needle: u8) -> Option<usize> {
+    haystack.iter().position(|&x| x == needle)
+}
+
+/// Parse HTTP request
+fn parse_request(req: &[u8]) -> anyhow::Result<http::Request<Vec<u8>>> {
+    // Extract first list
+    let first_line_end = find_in_bytes(req, b'\r').expect("No newline found in req");
+    let first_line = String::from_utf8_lossy(&req[..first_line_end]);
+    let first_line = first_line.split(' ').collect::<Vec<_>>();
+    let method = first_line[0];
+    let uri = first_line[1];
+    //let version = first_line[2];
+
+    let mut builder = http::Request::builder()
+        .method(http::method::Method::from_str(method)?)
+        .uri(uri)
+        .version(http::version::Version::HTTP_10); // FIXME: parse version properly
+
+    let mut remainder = &req[first_line_end + 2..];
+
+    // Parse following lines
+    while remainder.len() > 2 {
+        let line_end = find_in_bytes(remainder, b'\r').expect("No newline found while parsing headers");
+
+        if line_end == 0 {
+            break;
+        }
+
+        let line = String::from_utf8_lossy(&remainder[..line_end]);
+
+        let (key, value) = line.split_once(": ").unwrap();
+        builder = builder.header(key, value);
+
+        remainder = &remainder[line_end + 2..];
+    }
+
+    if remainder.len() > 2 {
+        Ok(builder.body(remainder[2..].to_vec())?)
+    }
+
+    else {
+        Ok(builder.body(Vec::new())?)
+    }
+}
+
+fn main() {
+    env_logger::init_from_env(env_logger::Env::new().default_filter_or("info"));
+
+    let args = Args::parse();
+
+    // First parse request and response
+    let request = std::fs::read(&args.req_file).expect("Failed to read request file!");
+    let request = parse_request(&request).expect("Failed to parse request file!");
+
+    println!("Request: {:?}", request);
+}