Session slice stops accepting new items

[ekkapob]

Are are any limit to the session? I have code below to append a new item to the slice. It works many items until some point I can't retrieve the new item data, like it stops accepting the new item after save.

I tried to print out the session store after session.save the data are in there. But in another handler, it can't see the new item. I registered all of the structs with gob, still not working. I have no clue because it works and then stop working like the session doesn't accept the new slice item, but editing the existing value still works.

// order.List = []Item
order.List = append(order.List, Item{name: "abc"})
session["order"] = order
session.Save(r, w)
// print here shows the new added item

but another handle doesn't see the new added item.

[elithrar]

Are you using the CookieStore? Check the error from session.Save - you might be hitting the 4KB size limit of a cookie.

…

On Mon, Mar 27, 2017 at 4:54 AM ekkapob ***@***.***> wrote: Are are any limit to the session? I have code below to append a new item to the slice. It works many items until some point I can't retrieve the new item data, like it stops accepting the new item after save. I tried to print out the session store after session.save the data are in there. But in another handler, it can't see the new item. I registered all of the structs with gob, still not working. I have no clue because it works and then stop working like the session doesn't accept the new slice item, but editing the existing value still works. // item.List = []Item item.List = append(item.List, Item{name: "abc"}) session["items"] = item session.save(r, w) // print here shows the new added item — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#109>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AABIcMVYBIFqwqsnf33lOeOqzyD_lD1Mks5rp6NrgaJpZM4MqKUe> .

[ekkapob]

@elithrar thank you! you are right the error says securecookie: the value is too long
With this, does the only option I have is using FilesystemStore instead with increase MaxLength? Checked with the session but not found any option to increase the size.

[elithrar]

- If you increase the MaxLength for the CookieStore, browsers will not accept your cookie - the typical max size per domain is 4KB. - You can use the FilesystemStore instead, or one of the many third party stores (https://github.com/gorilla/sessions#store-implementations) - the Redis one being my personal go-to - but I would sanity check the rationale for storing > 4KB per data per session as well.

…

On Mon, Mar 27, 2017 at 7:22 AM ekkapob ***@***.***> wrote: @elithrar <https://github.com/elithrar> thank you! you are right the error says securecookie: the value is too long With this, does the only option I have is using FilesystemStore instead with increase MaxLength? Checked with the session but not found any option to increase the size. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#109 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AABIcGQIONEPjAwOXYHcoQuOUDtJOTZjks5rp8YVgaJpZM4MqKUe> .

[ekkapob]

Thank you @elithrar for the answer and advice. I end up do the checking and warn the user as they shouldn't keep adding (temporary) things.