### What problem does this PR solve?
Actually fix#6241
Hello, I ran into the same problem as #6241. When I'm testing my agent
flow in the web ui using `Run` button with a file input, the retrieval
component always gave an empty output.
In the code I found that:
`web/src/pages/flow/debug-content/index.tsx`:
```tsx
const onOk = useCallback(async () => {
const values = await form.validateFields();
const nextValues = Object.entries(values).map(([key, value]) => {
const item = parameters[Number(key)];
let nextValue = value;
if (Array.isArray(value)) {
nextValue = ``;
value.forEach((x) => {
nextValue +=
x?.originFileObj instanceof File
? `${x.name}\n${x.response?.data}\n----\n` // Here, the file content always ends in '\n'
: `${x.url}\n${x.result}\n----\n`;
});
}
return { ...item, value: nextValue };
});
ok(nextValues);
}, [form, ok, parameters]);
```
while in the `agent/component/retrieval.py`:
```python
def _run(self, history, **kwargs):
query = self.get_input()
query = str(query["content"][0]) if "content" in query else ""
lines = query.split('\n') # inputs are split to ['xxx','yyy','----','']
query = lines[-1] if lines else "" # Here we always get '', thus no result
kbs = KnowledgebaseService.get_by_ids(self._param.kb_ids)
if not kbs:
return Retrieval.be_output("")
```
so the code will never got correct result.
I'm not sure why the input needs such a split here, so I just removed
the splitting, and it works well on my side.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
- [ ] New Feature (non-breaking change which adds functionality)
- [ ] Documentation Update
- [ ] Refactoring
- [ ] Performance Improvement
- [ ] Other (please describe):
ad4e59edb2