/[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 2147 by joey, Thu Apr 1 09:58:30 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            xml = None
118          self.wmsVersion = "1.1"          self.wmsVersion = "1.1"
119          self.capabilities = self.getCapabilities(resource, self.wmsVersion)          xml = self.getCapabilities(resource, self.wmsVersion)
120          if not self.capabilities:          if not self.capabilities:
121              self.wmsVersion = "1.0"              self.wmsVersion = "1.0"
122              self.capabilities = self.getCapabilities(resource, self.wmsVersion)              xml = self.getCapabilities(resource, self.wmsVersion)
123    
124    
125      def saveCapabilities (self, fname):      def saveCapabilities(self, fname):
126          """Save capabilities to local file"""          """Save capabilities to local file"""
127    
128          if self.capabilities is None:          if self.capabilities is None:
129              self.errorMsg = _("No capabilities available")              self.errorMsg = _("No capabilities available")
130          else:          else:
131              try:              try:
132                  out = open (fname, "w")                  out = open(fname, "w")
133                  out.write (self.capabilities)                  out.write(self.capabilities)
134                  out.close()                  out.close()
135              except:              except IOError:
136                  self.errorMsg = _("Can't open file '%s' for writing") % fname                  self.errorMsg = _("Can't open file '%s' for writing") % fname
137    
138    
139      def loadCapabilities (self, fname):      def loadCapabilities(self, fname):
140          """Load capabilities from a local file"""          """Load capabilities from a local file"""
141    
142          try:          try:
143              input = open (fname, "r")              input = open(fname, "r")
144              self.capabilities = input.read ()              xml = input.read()
145              input.close()              input.close()
146          except:          except IOError:
147              self.errorMsg = _("Can't open file '%s' for reading") % fname              self.errorMsg = _("Can't open file '%s' for reading") % fname
148    
149    
150      def printCapabilities (self):      def printCapabilities(self):
151          """Prints capabilities to stdout"""          """Prints capabilities to stdout"""
152    
153          print self.capabilities          print self.capabilities
# Line 154  class WMSCapabilities (WMSClient): Line 157  class WMSCapabilities (WMSClient):
157  if __name__ == "__main__":  if __name__ == "__main__":
158      capabilities \      capabilities \
159          = WMSCapabilities("http://frida.intevation.org/cgi-bin/frida_wms?")          = WMSCapabilities("http://frida.intevation.org/cgi-bin/frida_wms?")
160      if capa.getErrorMsg() is None:      if capabilities.getErrorMsg() is None:
161          capa.saveCapabilities("frida_capabilities.xml")          capabilities.saveCapabilities("frida_capabilities.xml")
162      else:      else:
163          print "Error: " + capa.getErrorMsg()          print "Error: " + capabilities.getErrorMsg()
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