Per-chunk filenames

Use:
query: (fileObj, chunk) => {
   // Upload "foobar.bin" first chunk at "segments/000-foobar.bin"
   chunk.filename = 'segments/' + chunk.offset.toString().padStart(3, 0) + '-' + fileObj.file.name;
}

Author: Raphaël Droz

src/flow.js

@@ -1169,6 +1169,12 @@
      */
     this.startByte = this.offset * this.chunkSize;
 
+    /**
+     * A specific filename for this chunk which otherwise default to the main name
+     * @type {string}
+     */
+    this.filename = null;
+
     /**
       * Compute the endbyte in a file
       *
@@ -1512,7 +1518,9 @@
         each(query, function (v, k) {
           data.append(k, v);
         });
-        if (typeof blob !== "undefined") data.append(this.flowObj.opts.fileParameterName, blob, this.fileObj.file.name);
+        if (typeof blob !== "undefined") {
+            data.append(this.flowObj.opts.fileParameterName, blob, this.filename || this.fileObj.file.name);
+        }
       }
 
       this.xhr.open(method, target, true);