How to access file uploaded via form

Flowable Engine
1

I start a process with a form with a file upload.

When I use execution.getVariable(‘uploadedfile’) a number (e.g. 23740) is returned. How can I access the content of the uploaded file?

Thanks,
Pascal

1 Like
2

The variable contains the id (e.g. 23740) of the content item stored by the content engine, but how can I access the content item?

3

Discovered that it is possible to access the content via the rest api (e.g. content-api/content-service/content-items/23740/data).

Another alternative would be ContentService#getContentItemData(String contentItemId), but how can I access the ContentService in a process execution?

4

The solution is:

InputStream is = ContentEngines.getDefaultContentEngine().getContentService().getContentItemData(execution.getVariable(‘uploadedfile’));

1 Like
5

When I am using the given script i.e

InputStream is = ContentEngines.getDefaultContentEngine().getContentService().getContentItemData(execution.getVariable(‘propertyfile’));

It is giving me error:

org.flowable.common.engine.api.FlowableException: problem evaluating script: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: ContentEngines for class: Script12
at org.flowable.common.engine.impl.scripting.ScriptingEngines.evaluate(ScriptingEngines.java:89) ~[flowable-engine-common-6.3.1.jar:6.3.1]

I am using groovy script format. Can any help me.

6

Did you use ContentEngines in your script? It seems they are not defined.

Regards
Martin

7

HI Martin,

Thanks for your response.
This is the complete code in groovy script which I am trying to run

import org.flowable.*

File file = new File(filepath)
if (propertyfile){
println execution.getVariable('propertyfile')
println propertyfile

InputStream is = ContentEngines.getDefaultContentEngine().getContentService().getContentItemData(execution.getVariable('propertyfile'));

OutputStream outputStream = new FileOutputStream(filepath);
IOUtils.copy(is, outputStream);
outputStream.close();
}

The property file is the upload field name. But when I am print it. It is just printing the UUID. The ContentEngines is not working to read the file.

8

Could you check what is going on in getContentItemData?

9

At the beginning, create a form with a file upload widget named file and then choose a png image.

Then the following code is working in a groovy script task:

import org.flowable.content.engine.ContentEngines;
import org.apache.commons.io.IOUtils;

file = execution.getVariable('file')
InputStream is = ContentEngines.getDefaultContentEngine().getContentService()
.getContentItemData(file);

OutputStream outputStream = new FileOutputStream("/tmp/test.png");
IOUtils.copy(is, outputStream);
outputStream.close();