From 1c7a3b3b6cfca98b8fcf98e18c235d63d7015532 Mon Sep 17 00:00:00 2001
From: Dmitrii Stepanov <d.stepanov@yadro.com>
Date: Mon, 28 Oct 2024 12:26:33 +0300
Subject: [PATCH] [#173] s3: Support variable key length

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>
---
 scenarios/libs/keygen.js   | 43 ++++++++++++++++++++++++++------------
 scenarios/run_scenarios.md |  1 +
 2 files changed, 31 insertions(+), 13 deletions(-)

diff --git a/scenarios/libs/keygen.js b/scenarios/libs/keygen.js
index f6a9aa5..2691337 100644
--- a/scenarios/libs/keygen.js
+++ b/scenarios/libs/keygen.js
@@ -1,17 +1,34 @@
-import {uuidv4} from './k6-utils-1.4.0.js';
+import { uuidv4 } from './k6-utils-1.4.0.js';
 
 export function generateS3Key() {
-    let width = parseInt(__ENV.DIR_WIDTH || '0');
-    let height = parseInt(__ENV.DIR_HEIGHT || '0');
-  
-    let key = ''
-    if (width > 0 && height > 0) {
-      for (let index = 0; index < height; index++) {
-        const w = Math.floor(Math.random() * width) + 1;
-        key = key + 'dir' + w + '/';
-      }
+  let width = parseInt(__ENV.DIR_WIDTH || '0');
+  let height = parseInt(__ENV.DIR_HEIGHT || '0');
+
+  let key = ''
+  if (width > 0 && height > 0) {
+    for (let index = 0; index < height; index++) {
+      const w = Math.floor(Math.random() * width) + 1;
+      key = key + 'dir' + w + '/';
     }
-  
-    key += (__ENV.OBJ_NAME || uuidv4());
-    return key;
+  }
+
+  key += objName();
+  return key;
+}
+
+const asciiLetters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"
+
+function objName() {
+  if (__ENV.OBJ_NAME) {
+    return __ENV.OBJ_NAME;
+  }
+  const length = parseInt(__ENV.OBJ_NAME_LENGTH || '0');
+  if (length > 0) {
+    let name = "";
+    for (let i = 0; i < length; i++) {
+      name += asciiLetters.charAt(Math.floor(Math.random() * asciiLetters.length));
+    }
+    return name;
+  }
+  return uuidv4();
 }
\ No newline at end of file
diff --git a/scenarios/run_scenarios.md b/scenarios/run_scenarios.md
index 468340a..d0e8330 100644
--- a/scenarios/run_scenarios.md
+++ b/scenarios/run_scenarios.md
@@ -138,6 +138,7 @@ Options (in addition to the common options):
   * `DELETE_AGE` - age of object in seconds before which it can not be deleted. This parameter can be used to control how many objects we have in the system under load.
   * `SLEEP_DELETE` - time interval (in seconds) between deleting VU iterations.
   * `OBJ_NAME` - if specified, this name will be used for all write operations instead of random generation.
+  * `OBJ_NAME_LENGTH` - if specified, then name of the object will be generated with the specified length of ASCII characters.
   * `DIR_HEIGHT`, `DIR_WIDTH` - if both specified, object name will consist of `DIR_HEIGHT` directories, each of which can have `DIR_WIDTH` subdirectories, for example for `DIR_HEIGHT = 3, DIR_WIDTH = 100`, object names will be `/dir{1...100}/dir{1...100}/dir{1...100}/{uuid || OBJ_NAME}`
 
 ## S3 Multipart