antspy opened a new issue, #46073:
URL: https://github.com/apache/arrow/issues/46073
### Describe the bug, including details regarding any error messages,
version, and platform.
Hi,
**TL;DR** Calling `const table = await arrow.tableFromIPC(response.body!)`
results in `Error: Unrecognized type: "undefined" (24)`. Not sure how to keep
debugging.
I have a backend which which takes a polars dataframe and returns it in IPC
format:
```python
@router.get('/df')
def df() -> Response:
"""Returns a sample polars dataframe in ipc format."""
...
buffer = df.select(pl.col('string_column')).write_ipc(None,
compression='uncompressed')
buffer.seek(0)
return Response(
buffer.getvalue(),
media_type='application/octet-stream',
headers={'Content-Type': 'application/octet-stream'},
)
```
If I try to parse this request on the frontend using `tableFromIPC`, I keep
getting the error above:
```typescript
const response = await fetch(url, {method: 'GET' })
const table = await arrow.tableFromIPC(response.body!)
```
This fails with `Error: Unrecognized type: "undefined" (24)`.
**Note**
I have also tried to visit the backend directly, save its response to a
local disk, and read from disk instead:
```typescript
const temp = readFileSync('/download')
const table = arrow.tableFromIPC(temp)
```
but this fails with the same error (`Error: Unrecognized type: "undefined"
(24)`).
I have tried many things, but without success. The error message offers no
real insights and I don't know how else to keep going.
Would appreciate any help!
### Component(s)
JavaScript
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