# obspy.arclink
**URL:** https://discourse.obspy.org/t/obspy-arclink/48
**Category:** Users Mailing List Archive
**Tags:** archive
**Created:** [March 31, 2011, 2:58pm UTC](https://discourse.obspy.org/t/obspy-arclink/48 "2011-03-31T14:58:09Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@Wang\_Xiao](https://discourse.obspy.org/u/Wang_Xiao)
#### Post date: [March 31, 2011, 2:58pm UTC](https://discourse.obspy.org/t/obspy-arclink/48/1 "2011-03-31T14:58:09Z")
Hi,
I deploy an ArcLink server and it works when I use telnet. But it doesn’t work if I access ArcLink server by using obspy.arclink client class. There is no any message to display when I run the obspy.arclink.
Any idea?
Thanksm
Xiao
1. Following is the procedures of using telnet. It works.
xiaowang@linux-5sog:~\> telnet [dh113045.esc.liv.ac.uk](http://dh113045.esc.liv.ac.uk) 18001
Trying 138.253.113.45…
Connected to [dh113045.esc.liv.ac.uk](http://dh113045.esc.liv.ac.uk).
Escape character is ‘^]’.
user xiao
OK
request waveform format=MSEED
OK
2010,04,06,00,00,00 2010,04,06,00,05,00 YF AGUA HHE
end
21
status 21
\
END
bye
Connection closed by foreign host.
1. Following is the file using obspy.arclink, but it doesn’t work:
from obspy.core import UTCDateTime
from obspy.arclink.client import Client
client = Client(“[dh113045.esc.liv.ac.uk](http://dh113045.esc.liv.ac.uk)”, 18001)
start = UTCDateTime(“2010-04-06 00:03:00”)
st = client.getWaveform(‘YF’, ‘AGUA’, ‘’, ‘HHE’, start - 3, start + 15)
st.plot()
---
### Author:  [@Wang\_Xiao](https://discourse.obspy.org/u/Wang_Xiao)
#### Post date: [March 31, 2011, 3:37pm UTC](https://discourse.obspy.org/t/obspy-arclink/48/2 "2011-03-31T15:37:15Z")
just dig log message from ArcLink server side and find a interesting thing:
I used st = client.getWaveform('YF', 'AGUA', '', 'HHE', start - 3, start + 15) to request waveform, but why the log message says "REQUEST ROUTING"?
Following is the log message from ArcLink server:
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63707 : opening connection
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63708 : opening connection
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63707 : closing connection
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63708 : HELLO
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63708 : USER ObsPy client
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63708 : INSTITUTION Anonymous
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63709 : opening connection
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63708 : closing connection
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63709 : HELLO
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63709 : USER ObsPy client
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63709 : INSTITUTION Anonymous
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63709 : REQUEST ROUTING
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63709 : END
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63709 : invalid request: STATUS
Mar 31 16:13:49 dh113045 arclink: 138.253.113.204:63709 : STATUS requires 1 argument
Mar 31 16:13:49 dh113045 arclink: [8073] STATUS LINE 0 PROCESSING routing
Mar 31 16:13:49 dh113045 arclink: [8073] STATUS LINE 0 OK
Mar 31 16:13:49 dh113045 arclink: [8073] STATUS VOLUME routing SIZE 392
Mar 31 16:13:49 dh113045 arclink: [8073] STATUS VOLUME routing OK
Mar 31 16:13:49 dh113045 arclink: [8073] END
Regards,
Xiao
---
### Author:  [@barsch](https://discourse.obspy.org/u/barsch)
#### Post date: [March 31, 2011, 5:32pm UTC](https://discourse.obspy.org/t/obspy-arclink/48/3 "2011-03-31T17:32:00Z")
Hi Xiao,
unfortunately I'm not able to run the example given below because the
ArcLink note dh113045.esc.liv.ac.uk:18001 is not public.
However, could you please initialize the obspy.arclink client with the
debug=True flag and send me the client output, the corresponding server
logs and the used ArcLink server version number - I will see what I can
do ...
Also, please make sure to use the latest developer version of the
ArcLink client - I fixed a few things in the last days but didn't had
time to create a new package yet.
Thanks + best,
Robert
Wang, Xiao schrieb:
---
### Author:  [@megies](https://discourse.obspy.org/u/megies)
#### Post date: [March 31, 2011, 5:55pm UTC](https://discourse.obspy.org/t/obspy-arclink/48/4 "2011-03-31T17:55:53Z")
Hi Xiao,
I have the feeling that it is a trivial problem:
Could you please try the Client initialization with "http://" in front
of the server name (like in the default for the kwarg "base\_url")?
I.e.:
client = Client("[http://dh113045.esc.liv.ac.uk](http://dh113045.esc.liv.ac.uk)", 18001)
best,
Tobias
Robert Barsch wrote:
---
### Author:  [@megies](https://discourse.obspy.org/u/megies)
#### Post date: [March 31, 2011, 6:00pm UTC](https://discourse.obspy.org/t/obspy-arclink/48/5 "2011-03-31T18:00:35Z")
Oh sorry, I mixed up the seishub and arclink clients. Please ignore the
previous mail.
best,
Tobias
Tobias Megies wrote:
---
### Author:  [@Wang\_Xiao](https://discourse.obspy.org/u/Wang_Xiao)
#### Post date: [April 1, 2011, 10:06am UTC](https://discourse.obspy.org/t/obspy-arclink/48/6 "2011-04-01T10:06:05Z")
Hi Robert,
> unfortunately I'm not able to run the example given below because the
> ArcLink note dh113045.esc.liv.ac.uk:18001 is not public.
Sorry, the dh113045.esc.liv.ac.uk is within the firewall.
> However, could you please initialize the obspy.arclink client with the
> debug=True flag and send me the client output, the corresponding server
> logs and the used ArcLink server version number - I will see what I can
> do ...
1. Please see the obspy.client file:
xiaowang@linux-5sog:~/Develop-Code/code-test/obspy-test\> more obspy-liv-arclink.py
from obspy.core import UTCDateTime
from obspy.arclink.client import Client
client = Client(host="dh113045.esc.liv.ac.uk", port=18001, debug=True)
start = UTCDateTime("2010-04-06 00:03:00")
st = client.getWaveform('YF', 'AGUA', '', 'HHE', start - 3, start + 15)
st.plot()
2. please see the debug message:
xiaowang@linux-5sog:~/Develop-Code/code-test/obspy-test\> python obspy-liv-arclink.py
> > > HELLO
... ArcLink v1.2 (2010.256)
... SeisLiv
> > > USER ObsPy client
... OK
> > > INSTITUTION Anonymous
... OK
> > > REQUEST ROUTING
> > > 2010,4,6,0,2,56,0 2010,4,6,0,3,16,0 YF AGUA
> > > END
... OK
> > > STATUS
... ERROR
...
...
...
^Z
[3]+ Stopped python obspy-liv-arclink.py
3. please see the ArcLink server log message:
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60052 : opening connection
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60053 : opening connection
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60052 : closing connection
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60053 : HELLO
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60053 : USER ObsPy client
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60053 : INSTITUTION Anonymous
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60054 : opening connection
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60053 : closing connection
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60054 : HELLO
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60054 : USER ObsPy client
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60054 : INSTITUTION Anonymous
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60054 : REQUEST ROUTING
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60054 : END
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60054 : invalid request: STATUS
Apr 1 10:48:44 dh113045 arclink: 138.253.113.204:60054 : STATUS requires 1 argument
Apr 1 10:48:44 dh113045 arclink: [7860] STATUS LINE 0 PROCESSING routing
Apr 1 10:48:44 dh113045 arclink: [7860] STATUS LINE 0 OK
Apr 1 10:48:44 dh113045 arclink: [7860] STATUS VOLUME routing SIZE 392
Apr 1 10:48:44 dh113045 arclink: [7860] STATUS VOLUME routing OK
Apr 1 10:48:44 dh113045 arclink: [7860] END
Apr 1 10:48:58 dh113045 dhclient: XMT: Solicit on eth0, interval 120220ms.
4. please see the ArcLink server version:
xiao@dh113045:~/seiscomp3/arclink/bin\> ./arclink -V
ArcLink v1.2 (2010.256)
> Thanks + best,
Regards,
Xiao
---
### Author:  [@barsch](https://discourse.obspy.org/u/barsch)
#### Post date: [April 2, 2011, 7:48am UTC](https://discourse.obspy.org/t/obspy-arclink/48/7 "2011-04-02T07:48:29Z")
Hi Xiao,
seems like you use a very recent version of the ArcLink server which is
a bit more restrictive using a STATUS request without a status id - old
notes such as our version 1.1 note in Munich return on a plain STATUS
request the status id - version 1.2 quits with an error.
I'm going to fix that and report back to you.
Cheers,
Robert
- --
Dr. Robert Barsch
Department of Earth and Environmental Sciences, Geophysics
LMU Munich
Theresienstr. 41/IV
D-80333 Munich
Germany
Tel: +49 (0) 89 2180 4201
Fax: +49 (0) 89 2180 9942010
Mail: barsch@lmu.de
---
### Author:  [@barsch](https://discourse.obspy.org/u/barsch)
#### Post date: [April 2, 2011, 9:45am UTC](https://discourse.obspy.org/t/obspy-arclink/48/8 "2011-04-02T09:45:19Z")
Dear Xiao,
the issue should be fixed within the latest obspy.arclink revision -
please report back of there are still problems.
Thanks + best,
Robert
- --
Dr. Robert Barsch
Department of Earth and Environmental Sciences, Geophysics
LMU Munich
Theresienstr. 41/IV
D-80333 Munich
Germany
Tel: +49 (0) 89 2180 4201
Fax: +49 (0) 89 2180 9942010
Mail: barsch@lmu.de
---
### Author:  [@Wang\_Xiao](https://discourse.obspy.org/u/Wang_Xiao)
#### Post date: [April 4, 2011, 10:36am UTC](https://discourse.obspy.org/t/obspy-arclink/48/9 "2011-04-04T10:36:37Z")
Hi Robert,
Thanks to fix it.
Can the updated code be checked out from [https://svn.obspy.org](https://svn.obspy.org)?
I checked out from the above link, but failed to install. Please see the following message when I install it:
linux-5sog:/home/xiao/updated-obspy/obspy # /usr/lib/python/site-packages/easy\_install -N -d /usr/lib/python/site-packages/ obspy.arclink
Searching for obspy.arclink
Best match: obspy.arclink 0.4.5.dev-r2079
Processing obspy.arclink-0.4.5.dev\_r2079-py2.6.egg
obspy.arclink 0.4.5.dev-r2079 is already the active version in easy-install.pth
Using /usr/lib/python2.6/site-packages/obspy.arclink-0.4.5.dev\_r2079-py2.6.egg
Regards,
Xiao
---
### Author:  [@megies](https://discourse.obspy.org/u/megies)
#### Post date: [April 4, 2011, 6:01pm UTC](https://discourse.obspy.org/t/obspy-arclink/48/10 "2011-04-04T18:01:19Z")
Hi Xiao,
add option "-U" to update an already installed package and you also have
to specify version "==dev" to get the latest developer revision.
See [Home · obspy/obspy Wiki · GitHub](http://obspy.org/wiki/InstallationInstructions:)
easy\_install -N -U obspy.arclink==dev -d ...
..should do the trick.
best,
Tobias
Wang, Xiao wrote:
---
### Author:  [@Wang\_Xiao](https://discourse.obspy.org/u/Wang_Xiao)
#### Post date: [April 5, 2011, 10:11am UTC](https://discourse.obspy.org/t/obspy-arclink/48/11 "2011-04-05T10:11:28Z")
I did a try, but it still request routing, not request waveform.
Any idea?
Xiao
Here is my obspy.client file:
xiao@linux-5sog:~/Develop-Code/code-test/obspy-test\> more obspy-liv-arclink.py
from obspy.core import UTCDateTime
from obspy.arclink.client import Client
client = Client(host="dh113045.esc.liv.ac.uk", port=18001, debug=True)
start = UTCDateTime("2010-04-06 00:03:00")
st = client.getWaveform('YF', 'AGUA', '', 'HHE', start - 3, start + 15)
st.plot()
here is the output message:
xiao@linux-5sog:~/Develop-Code/code-test/obspy-test\> python obspy-liv-arclink.py
Connected to dh113045.esc.liv.ac.uk:18001
> > > HELLO
... ArcLink v1.2 (2010.256)
... SeisLiv
> > > USER ObsPy client
... OK
> > > INSTITUTION Anonymous
... OK
> > > REQUEST ROUTING
... OK
> > > 2010,4,6,0,2,56,0 2010,4,6,0,3,16,0 YF AGUA
> > > END
... 43
> > > STATUS 43
... \
\
\
\
\
\
\
\
END
> > > STATUS 43
... \
\
\
\
\
\
\
\
END
> > > STATUS 43
... \
\
\
\
\
\
\
\
END
> > > STATUS 43
... \
\
\
\
\
\
\
\
END
> > > STATUS 43
... \
\
\
\
\
\
\
\
END
> > > DOWNLOAD 43
\
\
\
\
\
\
> > > PURGE 43
> > > BYE
Requesting localhost:18001
Traceback (most recent call last):
File "obspy-liv-arclink.py", line 6, in \
st = client.getWaveform('YF', 'AGUA', '', 'HHE', start - 3, start + 15)
File "/usr/lib/python2.6/site-packages/obspy.core-0.4.5.dev\_r2095-py2.6.egg/obspy/core/util.py", line 427, in echo\_func
return func(\*args, \*\*kwargs)
File "/usr/lib/python2.6/site-packages/obspy.arclink-0.4.6.dev\_r2311-py2.6.egg/obspy/arclink/client.py", line 321, in getWaveform
endtime, format=format, compressed=compressed)
File "/usr/lib/python2.6/site-packages/obspy.core-0.4.5.dev\_r2095-py2.6.egg/obspy/core/util.py", line 427, in echo\_func
return func(\*args, \*\*kwargs)
File "/usr/lib/python2.6/site-packages/obspy.arclink-0.4.6.dev\_r2311-py2.6.egg/obspy/arclink/client.py", line 405, in saveWaveform
data = self.\_fetch(rtype, rdata)
File "/usr/lib/python2.6/site-packages/obspy.arclink-0.4.6.dev\_r2311-py2.6.egg/obspy/arclink/client.py", line 177, in \_fetch
self.open(self.host, self.port, self.timeout)
File "/usr/lib/python2.6/telnetlib.py", line 225, in open
self.sock = socket.create\_connection((host, port), timeout)
File "/usr/lib/python2.6/socket.py", line 514, in create\_connection
raise error, msg
socket.error: [Errno 111] Connection refused
---
### Author:  [@Wang\_Xiao](https://discourse.obspy.org/u/Wang_Xiao)
#### Post date: [April 5, 2011, 10:36am UTC](https://discourse.obspy.org/t/obspy-arclink/48/12 "2011-04-05T10:36:17Z")
figured out the problem: reconfigure arclink server from localhost to real hostname. So it looks working and I can display waveform.
Regards,
Xiao