Install the "express" node module via npm

[obsolete/notmuch-web] / node_modules / express / node_modules / connect / lib / middleware / limit.js

diff --git a/node_modules/express/node_modules/connect/lib/middleware/limit.js b/node_modules/express/node_modules/connect/lib/middleware/limit.js
new file mode 100644 (file)
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+++ b/node_modules/express/node_modules/connect/lib/middleware/limit.js
@@ -0,0 +1,78 @@
+
+/*!
+ * Connect - limit
+ * Copyright(c) 2011 TJ Holowaychuk
+ * MIT Licensed
+ */
+
+/**
+ * Limit request bodies to the given size in `bytes`.
+ *
+ * A string representation of the bytesize may also be passed,
+ * for example "5mb", "200kb", "1gb", etc.
+ *
+ * Examples:
+ *
+ *     var server = connect(
+ *       connect.limit('5.5mb')
+ *     ).listen(3000);
+ *
+ * TODO: pause EV_READ
+ *
+ * @param {Number|String} bytes
+ * @return {Function}
+ * @api public
+ */
+
+module.exports = function limit(bytes){
+  if ('string' == typeof bytes) bytes = parse(bytes);
+  if ('number' != typeof bytes) throw new Error('limit() bytes required');
+  return function limit(req, res, next){
+    var received = 0
+      , len = req.headers['content-length']
+        ? parseInt(req.headers['content-length'], 10)
+        : null;
+
+    // deny the request
+    function deny() {
+      req.destroy();
+    }
+
+    // self-awareness
+    if (req._limit) return next();
+    req._limit = true;
+
+    // limit by content-length
+    if (len && len > bytes) deny();
+
+    // limit
+    req.on('data', function(chunk){
+      received += chunk.length;
+      if (received > bytes) deny();
+    });
+
+    next();
+  };
+};
+
+/**
+ * Parse byte `size` string.
+ *
+ * @param {String} size
+ * @return {Number}
+ * @api private
+ */
+
+function parse(size) {
+  var parts = size.match(/^(\d+(?:\.\d+)?) *(kb|mb|gb)$/)
+    , n = parseFloat(parts[1])
+    , type = parts[2];
+
+  var map = {
+      kb: 1024
+    , mb: 1024 * 1024
+    , gb: 1024 * 1024 * 1024
+  };
+
+  return map[type] * n;
+}
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