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Getting an error 400 when using a third party app

Bholcombe

I am currently using an app to record lectures and then I upload them to my drop box. This is the second semester I've done this so I know it works. This evening when I was trying to upload the recordings I kept getting Dropbox.com error 400. What does this mean? I've tried two different recordings and neither are uploading. HELP. Everything is up to date and I just did a backup this evening trying to solve the problem.

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Greg-DB

@Bholcombe If you're receiving this error, it likely indicates that the third party app you're using is still using the now-retired API v1.

If you're not the developer of the app, you'll need to contact them and request an updated version of the app that uses API v2 instead. They can contact us and request an extension for access to API v1 if necessary.

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Ciack404

Same here. A script that's been running daily for a couple of years started getting 400s (I noticed it this morning)

The script is in go, and I'm using this package https://github.com/stacktic/dropbox

Ciack404

Ok turns out dropbox API v1 has been turned off: https://www.dropbox.com/developers/apps/create

On September 28, 2017, API v1 will be turned off, so it's time to move to API v2.
If you want your app's Dropbox integration to keep working, upgrade to API v2.
For details about the deprecation, check out the blog post.
Please acknowledge that API v1 is being deprecated by clicking the box below. If you do not acknowledge that you're aware of the deprecation, your app's users will be notified as part of the deprecation timeline.
I understand that API v1 is being deprecated

Ciack404

As a note: I've tried using the unofficial-official go package and I'm getting the same error...

https://github.com/dropbox/dropbox-sdk-go-unofficial

linked from

https://github.com/dropbox

Ciack404

Ok I managed to get it working in the end:

I am using the Download() function of the Go SDK. Up till now to request a file I had to pass the path like this

folder/filename.ext

while now it's

/folder/filename.ext

(notice the "/" at the beginning)

Greg-DB

@Bholcombe If you're receiving this error, it likely indicates that the third party app you're using is still using the now-retired API v1.

Greg-DB

@Ciack404 I'm glad to hear you got this sorted out already.

For reference, yes, stacktic/dropbox does appear to use API v1, so using it will now return a 400 error.

The dropbox-sdk-go-unofficial SDK does use API v2, but note that there are other cases that can result in a 400 error, such as not including the leading '/' as you found. (The body of the error would contain more specific error information.)

Ciack404

Thanks for the reply.

Just for information: up till yesterday both the https://github.com/stacktic/dropbox and https://github.com/dropbox/dropbox-sdk-go-unofficial (which I'm using now) worked without the leading slash.

gill5

How do I upgrade to get rid of this Error 400 message?

Greg-DB

@gill5 If you're not the developer of the app, you'll need to contact the developer for an updated version.

If you are the developer, you'll need to update your app to use API v2.

gill5

what do you mean developer of the app? I just load up the app onto my iPad and use it.

Greg-DB

@gill5 In that case it sounds like you're a user of the app, not the developer. The developer is the person who creates the app and releases it on the App Store. You'll need to contact support for that app for help with it.

bookaholixanon

I can understand upgrading DropBox, making it work better for all users, etc. but why on earth would DropBox developers "upgrade" it in such a way that would immediately cause things to break in a huge number of existing apps that use DropBox? How is that supposed to help users of DropBox? (hint: it does the very opposite)

gill5

How do I know who to contact? It is the dropbox app on the apple app store.

So what do I do?

Greg-DB

@bookaholixanon Thanks for the feedback! I'll send that along to the team. For reference, we of course didn't want to break anyone, but Dropbox continuously works on improving the functionality it offers, which sometimes requires deprecating and retiring older versions.

When we do need to do that, we always try to give as much warning and time to migrate as possible. For example, in this case, we announced that API v1 would be retired over a year ahead of the retirement date in order to give developers time to migrate their apps. Unfortunately, not all apps have been migrated.

Greg-DB

@gill5 You shouldn't be seeing a 'v1_retired' error from the official Dropbox iOS app itself. You may see a warning in the official app when linking the third party app though.

In any case, there should be a "Support" link on the App Store page for whichever third party app you're trying to link to/use. That should go to the developer of the app.