File upload to Akamai NetStorage causes error "SSH_FX_BAD_MESSAGE"

[cyberduck]

b012d94 created the issue

Version: 3.3 (5552)

Connecting to Akamai NetStorage (Akamai Storage in the cloud) via SSH. Can login and browse files successfully. When I drap and drop a file from the Finder in to cyberduck, the upload process connects and then errors out with the following

Bad message (SSH_FX_BAD_MESSAGE: A badly formatted packet or other SFTP protocol incompatibility was detected.).

No information is available in the trace window

Note that I can upload correctly on same machine to same host using Filezilla

[cyberduck]

paul167 commented

Same issue here, can't upload to akamai over sftp

[cyberduck]

@dkocher commented

I would need a test account at Akamai to debug this issue.

[cyberduck]

b012d94 commented

I can take care of this

[cyberduck]

@dkocher commented

Replying to [comment:4 graeme@…]:

I can take care of this

I have written an email to [ccare@akamai.com] about this.

[cyberduck]

9a8d2c8 commented

Replying to [comment:5 dkocher]:

Replying to [comment:4 graeme@…]:

I can take care of this

I have written an email to [ccare@akamai.com] about this.
Anyway I can help out ? I dig cyberduck and this is a feature I could really use.
I tried checking out the code but couldn't figure out anyway to debug the Java stuff which seems to be the interesting part.
I did manage to upload a file with a simple project that uses Ganymed, so it doesn't seem to be broken in there.

[cyberduck]

@dkocher commented

Replying to [comment:6 paul167@…]:

Anyway I can help out ? I dig cyberduck and this is a feature I could really use.
I tried checking out the code but couldn't figure out anyway to debug the Java stuff which seems to be the interesting part.
I did manage to upload a file with a simple project that uses Ganymed, so it doesn't seem to be broken in there.

That is interesting. How does your setup of Ganymed differ from what you can find in [source:trunk/source/ch/cyberduck/core/sftp/SFTPSession.java SFTPSession]?

[cyberduck]

9a8d2c8 commented

Replying to [comment:7 dkocher]:

That is interesting. How does your setup of Ganymed differ from what you can find in [source:trunk/source/ch/cyberduck/core/sftp/SFTPSession.java SFTPSession]?
Hard to say, my code is only about 10 lines long. All it does is create a connection, do public key auth then create a client and call put() on that client. Is there anyway I can debug the Java code / Instantiate SFTP Session without too much hassle ? There seems to be a buch of dependencies on preferences and so on.

[cyberduck]

@dkocher commented

Before trying to debug it might also help to look closer at the log. Using defaults in Terminal.app set the logging level of Cyberduck to debug:

defaults write ch.sudo.cyberduck logging debug

[cyberduck]

@dkocher commented

To debug Cyberduck, build it as usual but copy the file Info.plist.debug to build/Release/Cyberduck.app/Contents/Info.plist. You can then attach the Java remote debugger to port 5005`.

[cyberduck]

9a8d2c8 commented

So enabling logging only got me an "Upload failed" trace, but debugging got me a bit further (?).
The problem seems to happen in SFTPv3Client.java here.
The code expects a type of SSH_FXP_HANDLE but is getting a value of 101, so SSH_FXP_STATUS. I don't know about the protocol so this doesn't help me. Maybe you have an idea / tip ?
In the meanwhile I'll try to see how that execution differs from my lightweight test.

[cyberduck]

9a8d2c8 commented

It seems that my test only uses SCPClient and never SFTPv3Client, the latter seems to be a more complex implementation (and experimental according to the javadoc).

[cyberduck]

9a8d2c8 commented

Found the problem! This is it.
The remote file is created with read/write permissions (0x3), and akamai apparently only allows write. So If I replace that with 0x2 for write-only, I can upload fine.

My guess is you don't need read-write anyway, if you're creating/truncating a file, why would you read it ?
Can we incorporate a fix for the next release ? That'd be great.

[cyberduck]

@dkocher commented

Replying to [comment:13 paul167@…]:

Found the problem! This is it.
The remote file is created with read/write permissions (0x3), and akamai apparently only allows write. So If I replace that with 0x2 for write-only, I can upload fine.

My guess is you don't need read-write anyway, if you're creating/truncating a file, why would you read it ?
Can we incorporate a fix for the next release ? That'd be great.

I am hesitant to change this as it might break compatiblity with other servers.

[cyberduck]

2f05b9c commented

Any chance we could beta test this? Or find a different way to incorporate this like a bookmark option ?

[cyberduck]

@dkocher commented

In 3b0432f. Please test with the snapshot build available later today at (http://update.cyberduck.ch/nightly/).