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3
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1 '''
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2 redirects depending on a configuration file an index.meta purl to an viewer
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3 Created on 01.11.2012
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4
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5 @author: dwinter
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6 '''
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7
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8 import web
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9
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9 import managePurls.manageIndexMetaPURLs as manageIndexMetaPURLs
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3
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10 import logging
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11
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12 class redirector:
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13
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14 viewers={} # hash mit allen viewer name --> urls
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15 purlHandler=None
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16 def __init__(self):
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17 #read config file for the viewers
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11
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18 confFile= file("/usr/local/metadataServices/purlService/restService/viewer.config")
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3
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19
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20 self.purlHandler = manageIndexMetaPURLs.IndexMetaPURLManager()
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21
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22 for line in confFile.readlines():
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23 splitted=line.split(",")
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24
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25 list=[]
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26 if splitted[1]=="":
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27 list.append(None) # index.meta werden von dieser einstellung nicht interpretiert
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28 else:
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29 list.append(splitted[1])
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30
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31 if len(splitted)>1: # url fur image viewer
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32 if splitted[2]=="":
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33 list.append(None) # index.meta werden von dieser einstellung nicht interpretiert
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34 else:
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35 list.append(splitted[2])
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36 else:
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37 list.append(None) # null wenn keiner konfiguriert wird. TODO: handle this
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38
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39
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40 self.viewers[splitted[0]]=list
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41
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42 def GET(self,path):
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43
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44 splitted=path.split("/")
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45 if len(splitted)!=2: #pfrad sollte zwei anteile habe "flavour/purl"
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46 raise web.notfound("not found")
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47
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48 purl = splitted[1]
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49 flavour = splitted[0]
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50
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51 if flavour not in self.viewers.keys():
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52 raise web.notfound("no viewer for %s"%flavour)
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53
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54 formats = self.viewers[flavour]
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55
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56 viewerWithIndexMetaFormatString = formats[0];
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57 viewerWithImagePathFormatString = formats[1];
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58
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59
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60 # checke ob es einen Image path gibt
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61 path,validity = self.purlHandler.getImagePathValidity(purl)
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62 if path is not None and path!="":
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63 return self.handlePath(path,validity,viewerWithImagePathFormatString)
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64
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65
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66 path,validity = self.purlHandler.getPathValidity(purl)
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67
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68 if path is not None and path !="":
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69 return self.handlePath(path,validity,viewerWithIndexMetaFormatString)
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70
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71
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72
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73 #handle path
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74 def handlePath(self,path,validity,viewerFormatString):
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75
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76 if viewerFormatString is None or viewerFormatString=="":
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77 raise web.internalerror("no viewer configure for indexMeta for this flavour")
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78
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79 if path is None:
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80 raise web.notfound("Cannnot find a URL to this path")
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81
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82 if validity is manageIndexMetaPURLs.PERM_NON_VALID:
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83 raise web.notfound("PURL NON VALID ANYMORE!")
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84
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85 if validity is manageIndexMetaPURLs.TEMP_NON_VALID:
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86 return web.notfound("PURL currently not VALID try later!")
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87
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88
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89 viewerUrl = viewerFormatString%path
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90
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91 print viewerUrl
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92 raise web.redirect(viewerUrl,"302 found")
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93
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94 if __name__ == '__main__':
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11
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95 pass
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