Zabbix API: Error 412 Precondition Failed

[fandingo]

I'm trying to get started with the Zabbix API, but I always get HTTP 412 responses no matter what I try.

I'm using Python and Zabbix 2.0.3.

import urllib2
import simplejson

a = { 'jsonrpc': '2.0', 'method': 'user.login', 'params': { 'user': 'Admin', 'password' : '*******'}, 'id' : 1}
b = simplejson.dumps(a)
c = urllib2.urlopen('http://MYSERVER/zabbix/api_jsonrpc.php', data=b)

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.6/urllib2.py", line 126, in urlopen
    return _opener.open(url, data, timeout)
  File "/usr/lib64/python2.6/urllib2.py", line 397, in open
    response = meth(req, response)
  File "/usr/lib64/python2.6/urllib2.py", line 510, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib64/python2.6/urllib2.py", line 435, in error
    return self._call_chain(*args)
  File "/usr/lib64/python2.6/urllib2.py", line 369, in _call_chain
    result = func(*args)
  File "/usr/lib64/python2.6/urllib2.py", line 518, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 412: Precondition Failed

I've tried some other operations like host.create, but I always get the same 412 error.

In the Apache access logs, I see

MYSERVERIP - - [22/Jan/2013:14:47:55 -0600] "POST /zabbix/api_jsonrpc.php HTTP/1.1" 412 - "-" "Python-urllib/2.6"

Has anyone experienced this problem and know of a workaround?

Thanks,

[fandingo]

I figured it out.

API calls must set the Content-Type header to application/json.

Here's a working example:

import urllib2
import simplejson
a = { 'jsonrpc': '2.0', 'method': 'user.authenticate', 'params': { 'user': 'Admin', 'password' : '*****'}, 'id' : 1}
b = js.dumps(a)
c = urllib2.Request('http://MYSERVER/zabbix/api_jsonrpc.php', b, {'Content-Type': 'application/json'})
d = urllib2.urlopen(c)
d.read()

'{"jsonrpc":"2.0","result":"7f4901b22b63cd2***************","id":1}'

[Pavels]

Keep in mind that the user.authenticate method is deprecated starting from 2.2. You should use user.login instead:

https://www.zabbix.com/documentation/2.0/manual/appendix/api/user/authenticate

[fandingo]

Pavels thanks for the reminder.

I did review the migration guide. No use in writing code that's already deprecated.

[SergejZ]

Many thanks for the post

[SergejZ]

It works as expected with Python2.7.
But my be someone know how to use it with Python3.3 ?