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1 """
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2 request dispatcher
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3 """
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4
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5 __all__ = ['MapserverMiddleware', 'SVGSiteMap']
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6
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7 import os
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8 from pygraphviz import AGraph
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9 from webob import Request, exc
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10
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11 class MapserverMiddleware(object):
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12 """silly middleware to serve just the svg"""
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13 def __init__(self, app, svgmap, path='/map'):
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14 self.app
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15 self.svgmap = svgmap
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16 self.path = path
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17
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18 def __call__(self, environ, start_response):
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19 request = Request(environ)
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20 if request.path_info == self.path or not self.path:
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21 content = file(self.svgmap).read()
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22 return Response(content_type='image/svg+xml', body=content)
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23 return app(environ, start_response)
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24
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25
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26 class SVGSiteMap(object):
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27
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28 ### class level variables
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29 defaults = { 'app': None,
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30 'name': 'k0s.org',
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31 'file': None,
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32 'output': None,
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33 'bgcolor': 'black',
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34 'fontcolor': 'white',
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35 'fontname': 'Helvetica',
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36 'nodecolor': 'aqua',
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37 'edgecolor': 'lime',
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38 'shape': 'box'
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39 }
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40
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41 def __init__(self, app, **kw):
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42 self.app = app
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43 self.edges = {}
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44 for key in self.defaults:
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45 setattr(self, key, kw.get(key, self.defaults[key]))
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46 assert self.output, "Please give an output file"
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47 assert self.file, "Cannot save file!"
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48 if os.path.exists(self.file):
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49 self.graph = AGraph(self.file, directed=True)
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50 for edge in self.graph.edges():
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51 self.edges[(edge[0], edge[1])] = int(edge.attr['label'])
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52 else:
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53 self.graph = AGraph(directed=True)
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54 self.graph.graph_attr['title'] = self.name
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55 self.graph.graph_attr['label'] = self.name
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56 self.graph.graph_attr['fontname'] = self.fontname
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57 self.graph.graph_attr['fontcolor'] = self.fontcolor
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58 self.graph.graph_attr['bgcolor'] = self.bgcolor
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59 self.graph.node_attr['color'] = self.nodecolor
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60 self.graph.node_attr['fontcolor'] = self.fontcolor
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61 self.graph.node_attr[
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62 self.graph.node_attr['shape'] = self.shape
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63 self.graph.edge_attr['color'] = self.edgecolor
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64 self.graph.edge_attr['fontcolor'] = self.fontcolor
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65
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66 ### methods dealing with HTTP
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67 def __call__(self, environ, start_response):
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68 request = Request(environ)
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69 import pdb; pdb.set_trace()
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70 return self.app(environ, start_response)
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71
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72 def add(self, from_url, to_url):
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73 if (from_url, to_url) in self.edges:
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74 count = self.edges[(from_url, to_url)]
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75 count += 1
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76 self.edges[(from_url, to_url)] = count
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77 edge = self.graph.get_edge(from_url, to_url)
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78 edge.attr['label'] = str(count)
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79 else:
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80 self.edges[(from_url, to_url)] = 1
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81 self.graph.add_edge(from_url, to_url, label='1')
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82
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83 for url in from_url, to_url:
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84 node = self.graph.get_node(url)
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85 node.attr['label'] = url
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86 node.attr['href'] = url
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87
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88 if self.file:
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89 self.graph.write(self.file)
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90 if self.output:
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91 self.graph.draw(self.output, prog='dot')
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