question Error: file type not permitted or mime type does not match the file content? in Developer forum

Error: file type not permitted or mime type does not match the file content?

astanley — Tue, 24 May 2022 23:41:55 GMT

Hello I am getting the following error when trying to upload an excel file:

The field:

List of file extensions (comma-separated) that can be attached to documents via the attachment dialog. Extensions should not include the dot (.) e.g. xls,xlsx,doc,docx. Leave blank to allow all extensions.

found in System Properties > Security is left blank meaning all file types are permitted. The file type that pulled this error code was an .xls file type "Microsoft Excel 97-2002 Worksheet" at 17,034 KB. Another excel sheet of this same file type (.xls) at 4,506 KB was able to be uploaded with no issues. As a workaround, this excel sheet at 17,034 KB was converted to a zip to be uploaded (as per the servicenow KB article suggests: https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0718011). Is there another workaround for this issue? Also what is causing this issue for this excel file if other excel files are able to be uploaded?

Re: Error: file type not permitted or mime type does not match the file content?

shloke04 — Wed, 25 May 2022 04:13:23 GMT

@astanley

There is a very good article from ServiceNow on this issue. There might be multiple cause for this and a solution for each of them has been provided.

Please refer the HI article below which I think should get you to a solution.

https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0718011

Hope this helps. Please mark the answer as correct/helpful based on impact.

Regards,
Shloke

Re: Error: file type not permitted or mime type does not match the file content?

shloke04 — Wed, 25 May 2022 04:16:41 GMT

@astanley

Adding to my previous note here, there is another way mentioned by ServiceNow to handle this is by setting the below property to FALSE

Property Name : glide.security.file.mime_type.validation -- Set this to False

Property URL:

https://instance.service-now.com/nav_to.do?uri=sys_properties.do?sys_id=fa55aa66a5380110c0a0e1db2cdc95b2


Replace "instance' with your instance name.

HI Article Reference: https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0998558

Hope this helps. Please mark the answer as correct/helpful based on impact.

Regards,
Shloke

Re: Error: file type not permitted or mime type does not match the file content?

MarkM1172412930 — Wed, 24 Aug 2022 20:51:24 GMT

I have a question on this. I have turned this option off but still continue to get the error for a DLL file I am trying to upload to the MID Server JAR Files. I have even checked to make sure that dll is added to the list of allowed extensions to upload.