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Forum Discussion
upload API only works for very small files
Hello,
I try this command from my raspberry pi 2 with raspbian buster:
curl -v -X POST https://content.dropboxapi.com/2/files/upload --header "Authorization: Bearer xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx...
ags65 We looked into this, and it seems like you may be running in to this issue:
https://www.raspberrypi.org/forums/viewtopic.php?t=223026
As noted there, you can try:
To stop sending DFs, you can change net.ipv4.ip_no_pmtu_disc value to 1 in sysctl.
I would also try reducing the MTU on the interface in order to advertise a smaller MSS to the TCP peer.
Hi ags65,
That's a old curl feature currently almost deprecated. The idea is when relatively big file have to be passed, credentials to be check in advance, so prevents get notification for invalid credentials after passing everything. Generally something useful. But seems your curl version doesn't behave as expected. Actual files data have to be passed after the confirmation, but seems passed before that. Probably your network connection is very slow and that's why response delay is more than 1 second (the default threshold). You can try set this threshold to something appropriate in your case or try disable this check by explicitly set "Expect" header with empty value, for example. :wink:
Hope this gives the right direction.
Hi,
Thank you very much for your help, but the problem persists:
my network connection is fast, the raspberry pi is connected by ethernet cable to the router and my internet connection works with optic fibre cable.
cURL version is the last in raspbian: 7.64.0
the cURL command with option -H 'Expect:' does not send the "Expect: 100-continue" to dropbox but directly send the file. But the error is the same:
> POST /2/files/upload HTTP/1.1
> Host: content.dropboxapi.com
> User-Agent: curl/7.64.0
> Accept: */*
> Authorization: Bearer xxxxxxx
> Dropbox-API-Arg: {"path": "/README.md","mode": "add","autorename": true,"mute": false,"strict_conflict": false}
> Content-Type: application/octet-stream
> Content-Length: 8900
>
* upload completely sent off: 8900 out of 8900 bytes
* TLSv1.2 (IN), TLS alert, close notify (256):
* Empty reply from server
* Connection #0 to host content.dropboxapi.com left intact
curl: (52) Empty reply from serverIf there is a problem in my system, why it does not affect with small files to upload ?
From dropbox, is there a way to see the log of connection attempts?
Thank you for your help
Wow... That's strange. :thinking:
Make your own investigation, what's going on. Try crosscompile working desktop version and see if the behaviour changes. If I'm in your shoes, this would be the first check. Try if same file transfer gonna completes on desktop version.
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