SeoulSKY Posts - Answer Overflow

SeoulSKY

•Created by SeoulSKY on 3/12/2025 in #questions-issues

Custom Page for 404 Not Found

Based on the pull request here, I attempted to run the following code:

# sol.py

import solara

clicks = solara.reactive(0)

added = False


def add_exception_handler():
    global added
    print("add_exception_handler", added)
    if not added:
        import solara.server.starlette
        from starlette.responses import HTMLResponse

        async def server_error(request, exc):
            return HTMLResponse(content="My custom 404", status_code=exc.status_code)

        solara.server.starlette.app.add_exception_handler(404, server_error)
        added = True


@solara.component
def Page():
    # add the handler after all the imports are done to avoid a circular import
    add_exception_handler()
    solara.Text("hello world")

# sol.py

import solara

clicks = solara.reactive(0)

added = False


def add_exception_handler():
    global added
    print("add_exception_handler", added)
    if not added:
        import solara.server.starlette
        from starlette.responses import HTMLResponse

        async def server_error(request, exc):
            return HTMLResponse(content="My custom 404", status_code=exc.status_code)

        solara.server.starlette.app.add_exception_handler(404, server_error)
        added = True


@solara.component
def Page():
    # add the handler after all the imports are done to avoid a circular import
    add_exception_handler()
    solara.Text("hello world")

After running the solara:

solara run sol.py

solara run sol.py

If I visit the http://localhost:8765/invalid, it still shows "Page not found by Solara router" instead of "My custom 404". How to fix this code to make it work?

2 replies

SSolara

•Created by SeoulSKY on 1/30/2025 in #questions-issues

How to add an event listener to reacton.ipyvuetify.FileInput?

The following code correctly renders the FileInput component.

import solara
from reacton import ipyvuetify as rv

@solara.component
def Page() -> None:
  uploader = rv.FileInput(on_v_model=lambda e: print(e))

  uploader.on("click", lambda e: print(e))
  uploader.on("change", lambda e: print(e))

import solara
from reacton import ipyvuetify as rv

@solara.component
def Page() -> None:
  uploader = rv.FileInput(on_v_model=lambda e: print(e))

  uploader.on("click", lambda e: print(e))
  uploader.on("change", lambda e: print(e))

However, selecting a file doesn't trigger any lambda functions. I want to call an event listener when a file is selected. Does anyone know how to add a listener properly?

4 replies

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