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Can't read JSON file from network

 
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I am on a mac and trying to read a json file located on a network connected raspberry pi. The pi and the file are visible in Finder and can also be reached via ssh. But when I try to read the file from Java the error message is /nsp/pi/sprinkler/schedule.json (No such file or directory)"

Here is the Code:
 
Rancher
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I don't know pi programming. But, try creating a java.net.URL with the file path and then use URL's openStream() method to get an InputStream and read the file.
 
Mike Gauthier
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We had visitors for a few days so now I am back to this problem.

I tried to change to a url type read but couldn't get that to work either. I tried prepending:
http:
file:
ftp:
and even //nsp.local/pi/sprinkler/schedule.json

but all these resulted in timeout or no protocol errors.

The has to be some way of reading the pi file over the network, but I have not found it.

 
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What protocol is the PI using to share the files/file-system: SAMBA/SMB/CIFS, NFS, HTTP/WebDAV, FTP, etc?
 
Ron McLeod
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What is the operating system running on the PI device?
 
Mike Gauthier
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The pi is running samba under the latest stretch (debian) operating system.
The Mac Finder can see the pi, drill down, and open the schedule.json file so there must be a way to do this. I just haven't found it yet.
I'll be happy to supply any other information that might help.
 
Mike Gauthier
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In case it helps, this is the samba configuration file

[global]
workgroup = WORKGROUP
netbios name = NSP
realm = NSP
oplocks = no
kernel oplocks = no
max protocol = NT1
dns proxy = no
log file = /var/log/samba/log.%m
max log size = 1000
syslog = 0

panic action = /usr/share/samba/panic-action %d
server role = standalone server
passdb backend = tdbsam
obey pam restrictions = yes
unix password sync = yes
passwd program = /usr/bin/passwd %u
passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
pam password change = yes
map to guest = bad user
usershare allow guests = yes

[homes]
comment = Home Directories
browseable = no
read only = yes
create mask = 0700
directory mask = 0700
valid users = %S

[printers]
comment = All Printers
browseable = no
path = /var/spool/samba
printable = yes
guest ok = no
read only = yes
create mask = 0700

[print$]
comment = Printer Drivers
path = /var/lib/samba/printers
browseable = yes
read only = yes
guest ok = no

[pi]
path = /home/pi
valid users = pi
read only = no

[Raspi]
path = /
valid users = pi
read only = no

 
Ron McLeod
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You need to specify a UNC path in the form \\computer\folders\file

Either of these should work:
    "\\\\nsp\\pi\\sprinkler\\schedule.json"
    "\\\\nsp/pi/sprinkler/schedule.json"
 
Mike Gauthier
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i went back to the original code but changed the file name to
"\\\\nsp\\pi\\sprinkler\\schedule.json" and then I tried "\\\\nsp/pi/sprinkler/schedule.json"
I also tried both of the above with nsp.local instead of just nsp.

All cases result in file not found error.

run:
\\nsp\pi\sprinkler\schedule.json (No such file or directory)
BUILD SUCCESSFUL (total time: 8 seconds)

 
Ron McLeod
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Mike Gauthier wrote:run:
\\nsp\pi\sprinkler\schedule.json (No such file or directory)
BUILD SUCCESSFUL (total time: 8 seconds)


Hmm ... I would have expected that to work - must be a MAC thing.

One last suggestion is to try: "file:///nsp/pi/sprinkler/schedule.json"

If that doesn't work, you could looking at the JCIFS library.
 
Mike Gauthier
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Thanks, already tried that.

On the jcifs subject, I stumbled upon that and at first blush it looks to me that Mac must mount the shared resource first and then read it maybe with smb.

Definitely looks like a Mac thing here so I am headed over to that forum.

Thanks for assisting here.
 
Mike Gauthier
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After a good deal of research and experimenting, I was able to read the shared file using jcifs and SmbFileInputStream.

Here is the code I ended up with:
 
Ron McLeod
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Great - have a cow for figuring it out and for reporting back with your solution  

 
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Java file APIs (DOC, XLS, PDF, and many more)
https://products.aspose.com/total/java
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