1 files changed, 40 insertions, 0 deletions
diff --git a/src/encoding/response.rs b/src/encoding/response.rs
new file mode 100644
index 0000000..3564b34
--- /dev/null
+++ b/src/encoding/response.rs
@@ -0,0 +1,40 @@
+use super::headermap::HeaderMap;
+use anyhow::{anyhow, bail, Context};
+use std::str::FromStr;
+
+#[derive(Debug)]
+pub struct Response {
+    pub code: u16,
+    pub headers: HeaderMap,
+}
+
+impl FromStr for Response {
+    type Err = anyhow::Error;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let mut lines = s.lines();
+        let statusline = lines.next().ok_or(anyhow!("status line missing"))?;
+        let (sipver, rest) = statusline
+            .split_once(" ")
+            .ok_or(anyhow!("status line malformed"))?;
+        let (code, _status_str) = rest
+            .split_once(" ")
+            .ok_or(anyhow!("status line malformed"))?;
+        let code = u16::from_str(code).context("status code")?;
+
+        let Some(ver) = sipver.strip_prefix("SIP/") else {
+            bail!("sip version malformed");
+        };
+        if ver != "2.0" {
+            bail!("sip version {ver:?} is not supported");
+        }
+
+        let mut headers = HeaderMap::new();
+        for line in lines {
+            // TODO multiline values
+            let (key, value) = line.split_once(":").ok_or(anyhow!("header malformed"))?;
+            headers.insert_raw(key.trim().to_string(), value.trim().to_string())
+        }
+
+        Ok(Self { code, headers })
+    }
+}