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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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15
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11 import urllib
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18
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12 import urllib2
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3
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13
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14 class redirector:
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15
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16 viewers={} # hash mit allen viewer name --> urls
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17 purlHandler=None
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18 def __init__(self):
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19 #read config file for the viewers
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18
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20 confFile= file("/usr/local/metadataServices/purlService/restService/viewer.config")
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21 #confFile= file("/Users/dwinter/Documents/Projekte/MetaDataManagement/purlService/restService/viewer.config")
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3
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22 self.purlHandler = manageIndexMetaPURLs.IndexMetaPURLManager()
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23
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24 for line in confFile.readlines():
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25 splitted=line.split(",")
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26
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27 list=[]
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28 if splitted[1]=="":
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29 list.append(None) # index.meta werden von dieser einstellung nicht interpretiert
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30 else:
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31 list.append(splitted[1])
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32
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33 if len(splitted)>1: # url fur image viewer
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34 if splitted[2]=="":
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35 list.append(None) # index.meta werden von dieser einstellung nicht interpretiert
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36 else:
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37 list.append(splitted[2])
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38 else:
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39 list.append(None) # null wenn keiner konfiguriert wird. TODO: handle this
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40
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41
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42 self.viewers[splitted[0]]=list
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43
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44 def GET(self,path):
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45
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15
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46
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47 params = web.input()
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18
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48
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49 for key in params.keys():
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50 if key=="query" and params[key]=="()": #leere frage wegwerfen
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51 del params[key]
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52
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53
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54
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55
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3
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56 splitted=path.split("/")
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57 if len(splitted)!=2: #pfrad sollte zwei anteile habe "flavour/purl"
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58 raise web.notfound("not found")
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59
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60 purl = splitted[1]
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61 flavour = splitted[0]
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62
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63 if flavour not in self.viewers.keys():
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64 raise web.notfound("no viewer for %s"%flavour)
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65
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66 formats = self.viewers[flavour]
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67
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12
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68 viewerWithIndexMetaFormatString = formats[0].rstrip().lstrip().replace("\n",'')
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69 viewerWithImagePathFormatString = formats[1].lstrip().lstrip().replace("\n",'')
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3
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70
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71
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72 # checke ob es einen Image path gibt
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73 path,validity = self.purlHandler.getImagePathValidity(purl)
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74 if path is not None and path!="":
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75 return self.handlePath(path,validity,viewerWithImagePathFormatString,params)
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3
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76
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77
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78 path,validity = self.purlHandler.getPathValidity(purl)
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79
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80 if path is not None and path !="":
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81 return self.handlePath(path,validity,viewerWithIndexMetaFormatString,params)
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3
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82
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83
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84
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85 #handle path
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86 def handlePath(self,path,validity,viewerFormatString,params):
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3
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87
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88 if viewerFormatString is None or viewerFormatString=="":
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89 raise web.internalerror("no viewer configure for indexMeta for this flavour")
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90
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91 if path is None:
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92 raise web.notfound("Cannnot find a URL to this path")
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93
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94 if validity is manageIndexMetaPURLs.PERM_NON_VALID:
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95 raise web.notfound("PURL NON VALID ANYMORE!")
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96
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97 if validity is manageIndexMetaPURLs.TEMP_NON_VALID:
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98 return web.notfound("PURL currently not VALID try later!")
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99
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15
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100
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101
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18
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102
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103 if len(params.keys())>0:
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104 ret=[key+"="+params[key] for key in params.keys()]
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105 viewerUrl = viewerFormatString%path+'&'+u'&'.join(ret)
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106
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107
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108 else:
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109 viewerUrl = viewerFormatString%path
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18
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110
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3
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111 raise web.redirect(viewerUrl,"302 found")
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112
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113 if __name__ == '__main__':
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11
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114 pass
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