download documents from business data

Q&A
1

Hi,

I have a process and subprocess which manage pdf documents stored in business data, and I want to display these documents same way as servlet DocumentImageServlet.

A REST API extension which implements RestApiController is the best way to do this? or can I extend DocumentImageServlet in order to get documents from business data?

thanks!
Saoussen

2

You can use the case document REST API to retrieve documents. For more information see:

https://documentation.bonitasoft.com/bonita/7.5/bpm-api#toc17

3

Thank you for you answer, but my documents informations are in database. So to use case document REST API, I should load them in process to have access?

I tried to implement a Rest api extension as following:
def String pdfResponse
context.resourceProvider.getResourceAsStream(“pdf/test.pdf”).withStream { InputStream s →
pdfResponse = s.getText()
}

	responseBuilder.with {
		withResponse(pdfResponse)
		withMediaType("application/pdf")
		withCharacterSet("ISO-8859-5")
		build()
	}

but I have these errors:
Error: FDICT bit set in flate stream: 120, 63
Error: Invalid XRef stream header
Have you any idea about this?

thank you!

4

Which version of the product are you using? Community or Subscription?

5

I use Community version.

6

Right, I don’t believe REST API Extensions are supported in Community. In any case, file reading is beyond the scope of Bonitasoft. Here is a code snippet I used to read a file on the file system in a REST API Extension using the Subscription version of Bonita. This is just straight up Java file reading code:
String fileAndPath = "C:\\temp\\attachments\\" + fileLoc File file = new File(fileAndPath) Path source = Paths.get(fileAndPath) String mimeType = Files.probeContentType(source) FileInputStream fis = new FileInputStream(file) byte[] bytes = new byte[fis.available()] fis.read(bytes)

7

Hi Joe, thank you for your answer.
It’s possible to add REST API Extensions with Community version, but without using Studio. we should create a zip with files Index.groovy and page.properties then import it into portal.

Now I’m using Subscription, and I have the same problem with your code.
In fact browser display pdf file but with empty pages ( it works fine with other types like xml).
I tried to extend DocumentDownloadServlet but i can’t access to bdm, BusinessObjectDAOFactory returns ClassNotFoundException.

any help?
Thanks!

8

In Subscription you can use the File Viewer widget to view files:

https://documentation.bonitasoft.com/bonita/7.6/widgets#toc25

9

Same problem with File Viewer, displayed PDF is empty.
But I fixed this issue with the following code:

*File doc = new File("fileAndPath"); responseBuilder.with { withAdditionalHeader("Content-Disposition", "inline; filename=" + doc.getName()) withMediaType("application/pdf") withCharacterSet("ISO-8859-5") withResponse(doc.getText("ISO-8859-5")) build() }*

It was an encoding issue.
Thanks!

10

Same problem with File Viewer, displayed PDF is empty.
But I fixed this issue with the following code:

*File doc = new File("fileAndPath"); responseBuilder.with { withAdditionalHeader("Content-Disposition", "inline; filename=" + doc.getName()) withMediaType("application/pdf") withCharacterSet("ISO-8859-5") withResponse(doc.getText("ISO-8859-5")) build() }*

It was an encoding issue.
Thanks!

11

Good to know! Thanks for the update

12

Cool yes