File Upload Limit

[ShiminCai]

Hi there,

In our iOS app we are uploading files to our Dropbox with this Swift method:

func upload(_ destinationPath: String, fileUrl: URL, completion: @escaping (Bool) -> Void) {

        client.files.upload(path: destinationPath, input: fileUrl)

            .response { response, error in

                if error != nil {

                    print(error?.description)

                }

                if let response = response {

                    completion(true)

                } else {

                    print(error)

                    completion(false)

                }

                DispatchQueue.main.async {

                    SVProgressHUD.dismiss()

                }

            }

            .progress { progressData in

                let completedUnitCount = Float(progressData.completedUnitCount)

                let totalUnitCount = Float(progressData.totalUnitCount)

                let progress = completedUnitCount / totalUnitCount

                DispatchQueue.main.async {

                    SVProgressHUD.show(withStatus: "Uploading Plan documents to dropbox...\n\(Int(progress * 100))% completed")

                }

            }

}

It's been working fine until now...

One of our users was uploading a big file (521.5 mb) and encountered an uploading failure error at last moment having reached 100% upload. The Dropbox API threw this error and as a result no file was uploaded:

However, uploading works fine with smaller files. Just wondering if there is any file size upload limit in Dropbox?  How could we fix the upload failure? Your help is much appreciated.

Cheers,

Shimin

[Здравко · Accepted solution]

Hi @ShiminCai,

There isn't file size limit (there is actually but it's big enough, so doesn't matter), but it's a single transaction limit - not guaranteed more than 150MB. As can be seen in your code you are using single transaction upload only. Is it so, or just something is missing in your post. In such a case you are setting implicit limitation from transaction size to the file size! You can use upload sessions for bigger files, so to spread upload to multiple transactions (every one smaller than 150MB). 😉

Hope this helps.

[Greg-DB]

@ShiminCai Yes, as Здравко mentioned, the upload method only officially supports uploading files up to 150 MB in size. For larger files, like the "521.5 mb" file you mentioned, you will need to use "upload sessions".

[ShiminCai]

Hi @Greg-DB,

Upload sessions worked. I found the Swift sample using upload sessions you posted in another discussion thread, which worked a treat. Thank you so much for your help.

Cheers,

Shimin