+fn get_voter(request: &cgi::Request) -> Result<&[u8], cgi::Response> {
+ // Expect exactly one cookie, exactly as we generate it.
+ let cookie = request
+ .headers()
+ .get(cgi::http::header::COOKIE)
+ .map(|c| c.as_bytes())
+ .and_then(|c| c.strip_prefix(COOKIE_NAME))
+ .and_then(|c| c.strip_prefix(b"="))
+ .ok_or_else(|| cgi::text_response(400, "Invalid cookie"))?;
+ if cookie.len() != COOKIE_LENGTH || cookie.contains(&b' ') || cookie.contains(&b';') {
+ Err(cgi::text_response(400, "Invalid cookie"))
+ } else {
+ Ok(cookie)
+ }
+}
+
+fn tally_votes(dir: PathBuf) -> std::io::Result<HashMap<String, HashSet<String>>> {
+ let mut tally: HashMap<String, HashSet<String>> = HashMap::new();
+ if let Ok(vfile) = std::fs::File::open(dir.join("votes")) {
+ for liner in std::io::BufReader::new(vfile).lines() {
+ let line = liner?;
+ if let Some((voter, datum)) = line.split_once(' ') {
+ if voter.len() == COOKIE_LENGTH {
+ if let Some((vote, candidate)) = datum.split_once(' ') {
+ if vote == "0" {
+ if let Some(entry) = tally.get_mut(candidate) {
+ entry.remove(voter);
+ }
+ } else if vote == "1" {
+ tally
+ .entry(candidate.to_owned())
+ .or_default()
+ .insert(voter.to_owned());
+ }
+ }
+ }
+ }
+ }
+ }
+ Ok(tally)
+}
+
+fn make_random_id() -> [u8; COOKIE_LENGTH] {
+ let mut id = [0; COOKIE_LENGTH];
+ for i in 0..COOKIE_LENGTH {
+ while !(b'A'..=b'Z').contains(&id[i])
+ && !(b'a'..=b'z').contains(&id[i])
+ && !(b'0'..=b'9').contains(&id[i])
+ {
+ id[i] = random()
+ }
+ }
+ id
+}
+
+fn set_cookie(mut response: cgi::Response, path: &str) -> Result<cgi::Response, cgi::Response> {
+ response.headers_mut().append(
+ cgi::http::header::SET_COOKIE,
+ cgi::http::header::HeaderValue::from_bytes(
+ &[
+ COOKIE_NAME,
+ b"=",
+ &make_random_id(),
+ b"; Secure; HttpOnly; SameSite=Strict; Max-Age=30000000; Path=",
+ path.as_bytes(),
+ ]
+ .concat(),
+ )
+ .map_err(|_| cgi::text_response(503, "Couldn't make cookie"))?,
+ );
+ Ok(response)
+}
+
+const HTML_HEADER: &str = "<!DOCTYPE html>
+<html>
+ <head>
+ <meta charset=\"utf-8\">
+ <title>Vote!</title>
+ <style>
+ th { font-size: 70%; text-align: left }
+ input { transform: scale(1.5) }
+ div { animation: 2s infinite linear spin }
+ @keyframes spin {
+ from { transform:rotate(0) }
+ to { transform:rotate(1turn) }
+ }
+ </style>
+ <script>
+ window.onload = function() {
+ for (cb of document.getElementsByTagName('input')) {
+ cb.addEventListener('click', (function(cb) {
+ return function() {
+ cb.style.display = 'none'
+ const spin = document.createElement('div')
+ spin.appendChild(document.createTextNode('⏳'))
+ cb.parentElement.insertBefore(spin, cb)
+
+ const req = new XMLHttpRequest()
+ req.addEventListener('load', function(e) {
+ cb.parentElement.removeChild(cb.previousElementSibling)
+ if (req.status == 200) {
+ cb.style.display = ''
+ const delta = cb.checked ? 1 : -1
+ const count_td = cb.parentElement.previousElementSibling
+ count_td.textContent = parseInt(count_td.textContent) + delta
+ } else {
+ cb.parentElement.insertBefore(document.createTextNode('❗'), cb)
+ }
+ })
+ req.open('PUT', window.location.href)
+ req.send((cb.checked ? 1 : 0) + ' ' + cb.parentElement.nextElementSibling.innerHTML)
+ }
+ })(cb))
+ cb.disabled = false
+ }
+ }
+ function num_cmp(a, b) {
+ return parseInt(b.textContent) - parseInt(a.textContent)
+ }
+ function str_cmp(a, b) {
+ if (a.textContent < b.textContent) return -1
+ if (a.textContent > b.textContent) return 1
+ return 0
+ }
+ function checked_cmp(a, b) {
+ vs = [a, b].map(x => {
+ const v = x.children[0].checked + 0
+ return isNaN(v) ? -1 : v
+ })
+ return vs[1] - vs[0]
+ }
+ function sort_table(col, cmp) {
+ const rows = Array.from(document.getElementsByTagName('tr'))
+ rows.shift()
+ rows.sort((a, b) => cmp(a.children[col], b.children[col]))
+ for (row of rows) {
+ row.parentElement.appendChild(row)
+ }
+ }
+ </script>
+ </head>
+ <body>
+ <table>
+ <tr>
+ <th onclick='sort_table(0, num_cmp)'>Count</th>
+ <th onclick='sort_table(1, checked_cmp)'>Vote</th>
+ <th onclick='sort_table(2, str_cmp)'>Candidate</th>
+ </tr>";
+const HTML_FOOTER: &str = "
+ </table>
+ </body>
+</html>";
+
+fn supports(tally: &HashMap<String, HashSet<String>>, me: &str, candidate: &str) -> bool {
+ tally
+ .get(candidate)
+ .map(|supporters| supporters.contains(me))
+ .unwrap_or(false)
+}
+
projects / voter / blobdiff