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David W.152
9 years agoNew member | Level 1
API v2 upload_session/append_v2 doc help
Hi dropbox team,
I have no idea how to upload a larger file (>= 1GB) via upload_session/* API.
Can not find any full example code with that.
APIs:
/upload_session/start /upload_session/appen...
Greg-DB
Dropbox Staff
9 years agoHi David, I unfortunately don't have a sample of using upload sessions in bash/curl directly, but here are some examples using the Python and .NET SDKs, which should serve as a useful reference for the necessary logic:
# This uses the Dropbox Python SDK https://github.com/dropbox/dropbox-sdk-python to upload a file to the Dropbox API from the local file as specified by `file_path` to the remote path as specified by `dest_path`. It also chooses whether or not to use an upload session based on the size of the file: f = open(file_path) file_size = os.path.getsize(file_path) CHUNK_SIZE = 4 * 1024 * 1024 if file_size <= CHUNK_SIZE: print dbx.files_upload(f.read(), dest_path) else: upload_session_start_result = dbx.files_upload_session_start(f.read(CHUNK_SIZE)) cursor = dropbox.files.UploadSessionCursor(session_id=upload_session_start_result.session_id, offset=f.tell()) commit = dropbox.files.CommitInfo(path=dest_path) while f.tell() < file_size: if ((file_size - f.tell()) <= CHUNK_SIZE): print dbx.files_upload_session_finish(f.read(CHUNK_SIZE), cursor, commit) else: dbx.files_upload_session_append_v2(f.read(CHUNK_SIZE), cursor) cursor.offset = f.tell() f.close()
// This example uses the Dropbox .NET library https://github.com/dropbox/dropbox-sdk-dotnet to upload a file to a Dropbox account, using upload sessions for larger files: private async Task Upload(string localPath, string remotePath) { const int ChunkSize = 4096 * 1024; using (var fileStream = File.Open(localPath, FileMode.Open)) { if (fileStream.Length <= ChunkSize) { await this.client.Files.UploadAsync(remotePath, body: fileStream); } else { await this.ChunkUpload(remotePath, fileStream, (int)ChunkSize); } } } private async Task ChunkUpload(String path, FileStream stream, int chunkSize) { ulong numChunks = (ulong)Math.Ceiling((double)stream.Length / chunkSize); byte[] buffer = new byte[chunkSize]; string sessionId = null; for (ulong idx = 0; idx < numChunks; idx++) { var byteRead = stream.Read(buffer, 0, chunkSize); using (var memStream = new MemoryStream(buffer, 0, byteRead)) { if (idx == 0) { var result = await this.client.Files.UploadSessionStartAsync(false, memStream); sessionId = result.SessionId; } else { var cursor = new UploadSessionCursor(sessionId, (ulong)chunkSize * idx); if (idx == numChunks - 1) { FileMetadata fileMetadata = await this.client.Files.UploadSessionFinishAsync(cursor, new CommitInfo(path), memStream); Console.WriteLine (fileMetadata.PathDisplay); } else { await this.client.Files.UploadSessionAppendV2Async(cursor, false, memStream); } } } } }
- ivanhigueram7 years agoExplorer | Level 4
Hi Greg! Is possible to update the SO Documentation links, they're broken now :(
- Greg-DB7 years ago
Dropbox Staff
ivanhigueram I've updated my earlier post to embed the code snippets from the now-defunct StackOverflow Documentation pages directly. Hope this helps!
- ivanhigueram7 years agoExplorer | Level 4
Hi Greg-DB Thanks for replying back and point me to the code links. I recently opened another issue in the forum (https://www.dropboxforum.com/t5/API-Support-Feedback/Python-V2-How-to-do-batch-upload/m-p/329517) with my specific problem using batch upload.
Thanks!
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