/[thuban]/branches/WIP-pyshapelib-bramz/Extensions/wms/capabilities.py
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revision 2136 by joey, Wed Mar 24 20:05:33 2004 UTC revision 2148 by joey, Thu Apr 1 10:06:13 2004 UTC
# Line 24  class WMSCapabilities: Line 24  class WMSCapabilities:
24    
25      getErrorMsg()      getErrorMsg()
26    
27      fetchCapabilities (*resource)      fetchCapabilities(resource)
28      saveCapabilities (filename)      saveCapabilities(filename)
29      loadCapabilities (filename)      loadCapabilities(filename)
30      printCapabilities ()      printCapabilities()
31    
32  Requirements:  Requirements:
33      - PyOGCLib <http://www.sourceforge.net/projects/pyogclib>      - PyOGCLib <http://www.sourceforge.net/projects/pyogclib>
# Line 54  from sys import path Line 54  from sys import path
54    
55  # Assume the PyOGCLib to be checked out next to the thuban main directory  # Assume the PyOGCLib to be checked out next to the thuban main directory
56  pyogclib = "../../../PyOGCLib"  pyogclib = "../../../PyOGCLib"
57  if os.path.isdir (pyogclib) and os.path.isdir (pyogclib + "/ogclib"):  if os.path.isdir(pyogclib) and os.path.isdir(pyogclib + "/ogclib"):
58      path.insert (0, pyogclib)      path.insert(0, pyogclib)
59    
60  # We use gettext, so we need to import it and hence need to adjust the  # We use gettext, so we need to import it and hence need to adjust the
61  # path again  # path again
62  if __name__ == "__main__":  if __name__ == "__main__":
63      path.insert (0, "../../")      path.insert(0, "../../")
64    
65  # ----------------------------------------------------------------------  # ----------------------------------------------------------------------
66    
# Line 68  from Thuban import _ Line 68  from Thuban import _
68    
69  from ogclib.WMSClient import WMSClient  from ogclib.WMSClient import WMSClient
70    
71  class WMSCapabilities (WMSClient):  class WMSCapabilities(WMSClient):
72      """      """
73      Thuban class to maintain capabilities.  This class provides      Thuban class to maintain capabilities.  This class provides
74      methods to fetch, save and load capabilities as well as methods to      methods to fetch, save and load capabilities as well as methods to
# Line 85  class WMSCapabilities (WMSClient): Line 85  class WMSCapabilities (WMSClient):
85      errorMsg = None      errorMsg = None
86      wmsVersion = None      wmsVersion = None
87    
88      def __init__ (self, *parm):      def __init__(self, *parm):
89          """          """
90          Initialises Capabilities with one optional parameter          Initialises Capabilities with one optional parameter
91    
92            param can be either a URL or a filename:
93    
94          filename -- load capabilities from file          filename -- load capabilities from file
95          url -- fetch capabilities from network          url -- fetch capabilities from network
96          """          """
97    
98          if parm and parm[0]:          if parm and parm[0]:
99              if os.path.isfile (parm[0]):              if os.path.isfile(parm[0]):
100                  self.loadCapabilities (parm[0])                  self.loadCapabilities(parm[0])
101              else:              else:
102                  if parm[0].find ("http://",0) == 0:                  if parm[0].find("http://", 0) == 0:
103                      self.fetchCapabilities (parm[0])                      self.fetchCapabilities(parm[0])
104                  else:                  else:
105                      self.errorMsg \                      self.errorMsg \
106                          = _("Resource '%s' is neither local file nor URL")                          = _("Resource '%s' is neither local file nor URL") \
107                              % parm[0]                          % parm[0]
108    
109    
110      def getErrorMsg (self):      def getErrorMsg(self):
111          return self.errorMsg          return self.errorMsg
112    
113    
114      def fetchCapabilities (self, resource):      def fetchCapabilities(self, resource):
115          """Fetches the WMS capabilities from an Internet resource"""          """Fetches the WMS capabilities from an Internet resource"""
116    
117          self.wmsVersion = "1.1"          self.wmsVersion = "1.1"
# Line 119  class WMSCapabilities (WMSClient): Line 121  class WMSCapabilities (WMSClient):
121              self.capabilities = self.getCapabilities(resource, self.wmsVersion)              self.capabilities = self.getCapabilities(resource, self.wmsVersion)
122    
123    
124      def saveCapabilities (self, fname):      def saveCapabilities(self, fname):
125          """Save capabilities to local file"""          """Save capabilities to local file"""
126    
127          if self.capabilities is None:          if self.capabilities is None:
128              self.errorMsg = _("No capabilities available")              self.errorMsg = _("No capabilities available")
129          else:          else:
130              try:              try:
131                  out = open (fname, "w")                  out = open(fname, "w")
132                  out.write (self.capabilities)                  out.write(self.capabilities)
133                  out.close()                  out.close()
134              except:              except IOError:
135                  self.errorMsg = _("Can't open file '%s' for writing") % fname                  self.errorMsg = _("Can't open file '%s' for writing") % fname
136    
137    
138      def loadCapabilities (self, fname):      def loadCapabilities(self, fname):
139          """Load capabilities from a local file"""          """Load capabilities from a local file"""
140    
141          try:          try:
142              input = open (fname, "r")              input = open(fname, "r")
143              self.capabilities = input.read ()              self.capabilities = input.read()
144              input.close()              input.close()
145          except:          except IOError:
146              self.errorMsg = _("Can't open file '%s' for reading") % fname              self.errorMsg = _("Can't open file '%s' for reading") % fname
147    
148    
149      def printCapabilities (self):      def printCapabilities(self):
150          """Prints capabilities to stdout"""          """Prints capabilities to stdout"""
151    
152          print self.capabilities          print self.capabilities
# Line 154  class WMSCapabilities (WMSClient): Line 156  class WMSCapabilities (WMSClient):
156  if __name__ == "__main__":  if __name__ == "__main__":
157      capabilities \      capabilities \
158          = WMSCapabilities("http://frida.intevation.org/cgi-bin/frida_wms?")          = WMSCapabilities("http://frida.intevation.org/cgi-bin/frida_wms?")
159      if capa.getErrorMsg() is None:      if capabilities.getErrorMsg() is None:
160          capa.saveCapabilities("frida_capabilities.xml")          capabilities.saveCapabilities("frida_capabilities.xml")
161      else:      else:
162          print "Error: " + capa.getErrorMsg()          print "Error: " + capabilities.getErrorMsg()
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