Document upload size limit

An upload passes through several layers, each with its own maximum size — a file is only accepted if it fits within all of them. So an error like Maximum upload size exceeded means that one layer is still set too low.

Layer	Default	Setting
1a. GZAC frontend	5 MB	caseFileSizeUploadLimitMB
1b. form.io upload component	5 MB	customOptions.maxFileSize
2. GZAC backend	1 MB	SPRING_SERVLET_MULTIPART_MAX_FILE_SIZE & SPRING_SERVLET_MULTIPART_MAX_REQUEST_SIZE
3. Documenten API (Open Zaak)	4 GB	MIN_UPLOAD_SIZE

Layer 1 (GZAC frontend)

Angular src/environment.(prod).ts config, 50 MB example:

export const environment: ValtimoConfig = {
  ...
  caseFileSizeUploadLimitMB: 50
  ...
}

Form.io upload components, 50 MB example:

"customOptions": {"maxFileSize": 50, ...}

Layer 2 (GZAC backend)

Environment properties, 50 MB example:

SPRING_SERVLET_MULTIPART_MAX_FILE_SIZE=50MB
SPRING_SERVLET_MULTIPART_MAX_REQUEST_SIZE=50MB

Layer 3 (Documenten API)

Environment properties, 50 MB example:

MIN_UPLOAD_SIZE=52428800