initial commit

2026-09-01 18:33:56 +00:00
commit c24449ee0a
2761 changed files with 302737 additions and 0 deletions
@@ -0,0 +1,42 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _stream = require('stream');
+
+class OverflowError extends Error {}
+
+class MeterSream extends _stream.Transform {
+  constructor() {
+    let maxSize = arguments.length <= 0 || arguments[0] === undefined ? Infinity : arguments[0];
+
+    super();
+    this.maxSize = maxSize;
+    this.byteCount = 0;
+  }
+  _transform(chunk, encoding, cb) {
+    // if this is called, _flush isn't called
+    if (this.err) return cb(this.err);
+    if (this.maxSize === Infinity) return cb(null, chunk);
+    this.byteCount += chunk.length;
+    if (this.byteCount > this.maxSize) {
+      const remainingBytes = this.maxSize - this.byteCount;
+      const lastChunk = chunk.slice(0, remainingBytes);
+      this.err = new OverflowError(`Stream exceeded specified max of ${ this.maxSize } bytes.`);
+      // flush remaining chunk and wait until next
+      // _transform or _flush call to emit error
+      return cb(null, lastChunk);
+    }
+    cb(null, chunk);
+  }
+  // if error detected on last call to _transform
+  // flush will be called with the error
+  _flush(cb) {
+    cb(this.err);
+  }
+}
+MeterSream.OverflowError = OverflowError;
+
+exports.default = MeterSream;