Hi all,

I set up the data upload using nginx as described in the wiki 
(https://wiki.galaxyproject.org/Admin/Config/nginxProxy, using the subdirectory 
/galaxy).
The uploaded file also appears inside the uploade_store folder on the galaxy 
server, but galaxy does not add the file.
Investigating the log files, I found the corresponding lines in the 
nginx.error.log:

# Post request is received
2016/02/29 12:55:37 [notice] 13156#0: *4 "^(GET|HEAD|POST)$" matches "POST", 
client: 172.16.17.17, server: , request: "POST /_upload HTTP/1.1", host: 
"172.16.12.122", referrer: http://172.16.12.122/galaxy/
# Upload starts
2016/02/29 12:55:37 [info] 13156#0: *4 started uploading file "boxes.txt" to 
"/mnt/idrive1/database/tmp/upload_store/0020132707" (field "files_0|file_data", 
content type "text/plain"), client: 172.16.17.17, server: , request: "POST 
/_upload HTTP/1.1", host: "172.16.12.122", referrer: 
http://172.16.12.122/galaxy/
# Upload done, the file is present in the given path
2016/02/29 12:55:37 [info] 13156#0: *4 finished uploading file "boxes.txt" to 
"/mnt/idrive1/database/tmp/upload_store/0020132707", client: 172.16.17.17, 
server: , request: "POST /_upload HTTP/1.1", host: "172.16.12.122", referrer: 
"http://172.16.12.122/galaxy/";
# Redirection starts?
2016/02/29 12:55:37 [notice] 13156#0: *4 "^(GET|HEAD|POST)$" matches "POST", 
client: 172.16.17.17, server: , request: "POST /_upload HTTP/1.1", host: 
"172.16.12.122", referrer: "http://172.16.12.122/galaxy/";
2016/02/29 12:55:37 [notice] 13156#0: *4 "nginx_redir=([^&]+)" does not match 
"", client: 172.16.17.17, server: , request: "POST /_upload HTTP/1.1", host: 
"172.16.12.122", referrer: "http://172.16.12.122/galaxy/";
2016/02/29 12:55:37 [notice] 13156#0: *4 "" matches "/_upload_done", client: 
172.16.17.17, server: , request: "POST /_upload HTTP/1.1", host: 
"172.16.12.122", referrer: "http://172.16.12.122/galaxy/";
# Redirection should be done here
2016/02/29 12:55:37 [notice] 13156#0: *4 rewritten data: "/galaxy/api/tools", 
args: "", client: 172.16.17.17, server: , request: "POST /_upload HTTP/1.1", 
host: "172.16.12.122", referrer: "http://172.16.12.122/galaxy/";
# ModSecurity seems to block the redirect?
2016/02/29 12:55:37 [info] 13156#0: *4 ModSecurity: invalid "Content-Length" 
header, client: 172.16.17.17, server: , request: "POST /_upload HTTP/1.1", 
host: "172.16.12.122", referrer: "http://172.16.12.122/galaxy/";
2016/02/29 12:55:37 [notice] 13156#0: *4 "^(GET|HEAD|POST)$" matches "GET", 
client: 172.16.17.17, server: , request: "POST /_upload HTTP/1.1", host: 
"172.16.12.122", referrer: "http://172.16.12.122/galaxy/";

A ModSecurityEnabled off; within the /_upload and /_upload_done of the nginx 
config did not help.
Any idea why the Content-Length header causes problems and is blocked by 
modSec? Any workaround for ModSec to accept everything that goes from internal 
to internal?

Thanks for your help!

Best,
Jens

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