How to find the size of all files attached through bpm file uploader without using the cmis query?

Question

I wanted to restrict the files from the bpm file uploader after reaching the files attached size equal to 10 MB. I wanted to find the size of all the files attached without using the Cmis query.

Answer 1

The uploader knows the size of every file before it sends it: the browser's File object has size in bytes. Keep a running total in the coach and refuse uploads past the limit - no CMIS query needed:

// UI Toolkit File Uploader "on file selected" / "before upload" event (older toolkits: wrap the input in a custom view)
var LIMIT = 10 * 1024 * 1024;                       // 10 MB
var total = ${Total}.getData() || 0;                // hidden number control / tw.local.uploadedBytes
var f = event && event.file ? event.file : me.context.element.querySelector("input[type=file]").files[0];
if (total + f.size > LIMIT) {
  ${Msg}.setText("Attachments would exceed 10 MB (" + Math.round((total + f.size) / 1048576 * 10) / 10 + " MB)");
  return false;                                     // cancels the upload on toolkits that support it
}
// after a successful upload ("on upload"): ${Total}.setData(total + f.size);

For documents that were uploaded earlier (other tasks), read their sizes once when the coach loads - the BPM document store returns the size without CMIS:

GET /rest/bpm/wle/v1/process/{piid}?parts=documents      -> data.documents[].size (bytes), name, mimeType
// or the Document List control's data: ${DocList}.getData().forEach(function (d) { total += d.size || d.contentSize || 0; });

Server-side (service flow) the same information is tw.system.currentProcessInstance.documents (TWDocument.size) for the BPM document store, and tw.system.ecm / the ECM document properties (cmis:contentStreamLength) for FileNet - that one is a property fetch, not a search query.

References

• Process REST API - process documents
• JavaScript API - TWDocument