优化后端

2026-09-11 17:56:56 +08:00
parent 7eed11b774
commit 812e67422d
7299 changed files with 1744959 additions and 112 deletions
@@ -0,0 +1,29 @@
+"use strict";
+
+var utils = require("../utils");
+var GenericWorker = require("./GenericWorker");
+
+/**
+ * A worker which calculate the total length of the data flowing through.
+ * @constructor
+ * @param {String} propName the name used to expose the length
+ */
+function DataLengthProbe(propName) {
+    GenericWorker.call(this, "DataLengthProbe for " + propName);
+    this.propName = propName;
+    this.withStreamInfo(propName, 0);
+}
+utils.inherits(DataLengthProbe, GenericWorker);
+
+/**
+ * @see GenericWorker.processChunk
+ */
+DataLengthProbe.prototype.processChunk = function (chunk) {
+    if(chunk) {
+        var length = this.streamInfo[this.propName] || 0;
+        this.streamInfo[this.propName] = length + chunk.data.length;
+    }
+    GenericWorker.prototype.processChunk.call(this, chunk);
+};
+module.exports = DataLengthProbe;
+