[feat] Centralize basic utility functions

1 files changed, 23 insertions, 0 deletions

diff --git a/app/utils.js b/app/utils.js
new file mode 100644
index 0000000..2ff2b9c
--- /dev/null
+++ b/app/utils.js
@@ -0,0 +1,23 @@
+"use strict";
+
+const ct = module.exports.ct = (res, mime, code, head) =>
+  res.writeHead(code||200, Object.apply({"Content-Type": mime||"application/json"}, head));
+module.exports.sj = (res, data, {code, head}={}) => { ct(res, null, code, head); res.end(JSON.stringify(data)); }
+
+module.exports.res204 = (res) => { res.statusCode = 204; res.end(); }
+module.exports.err400 = (res, msg) => { ct(res, "text/plain", 400); res.end(""+(msg||"400 Bad Request")); }
+module.exports.err401 = (res, msg) => { ct(res, "text/plain", 401); res.end(""+(msg||"401 Unauthorized")); }
+module.exports.err403 = (res, msg) => { ct(res, "text/plain", 403); res.end(""+(msg||"403 Forbidden")); }
+module.exports.err404 = (res, msg) => { ct(res, "text/plain", 404); res.end(""+(msg||"404 Not Found")); }
+module.exports.err500 = (res, msg) => { ct(res, "text/plain", 500); res.end(""+(msg||"500 Internal Server Error"));
+                                        console.log(Date.now+" [ERROR] 500"); }
+
+module.exports.cors = fn => (req, res, ...rest) => {
+  res.setHeader("Access-Control-Allow-Origin", "*");
+  res.setHeader("Access-Control-Allow-Methods", "GET, POST");
+  fn(req, res, ...rest); };
+
+module.exports.parseCookies = req =>
+  req.headers.cookie?.split(";")
+    .map(c => c.split("=").map(s => decodeURIComponent(s.trim())))
+    .reduce((a,c) => (a[c[0]]=c[1],a), {});