class BaseWMSFactory: def __init__(self, configpath=None): self.layers = {} self.ordered_layers = [] self.styles = {} self.aggregatestyles = {} self.map_attributes = {} self.meta_styles = {} self.meta_layers = {} self.configpath = configpath self.latlonbb = None def loadXML(self, xmlfile=None, strict=False, xmlstring='', basepath=''): config = ConfigParser.SafeConfigParser() map_wms_srs = None if self.configpath: config.readfp(open(self.configpath)) if config.has_option('map', 'wms_srs'): map_wms_srs = config.get('map', 'wms_srs') tmp_map = Map(0,0) if xmlfile: load_map(tmp_map, xmlfile, strict) elif xmlstring: load_map_from_string(tmp_map, xmlstring, strict, basepath) else: raise ServerConfigurationError("Mapnik configuration XML is not specified - 'xmlfile' and 'xmlstring' variables are empty.\ Please set one of this variables to load mapnik map object.") # parse map level attributes if tmp_map.background: self.map_attributes['bgcolor'] = tmp_map.background if tmp_map.buffer_size: self.map_attributes['buffer_size'] = tmp_map.buffer_size for lyr in tmp_map.layers: layer_section = 'layer_%s' % lyr.name layer_wms_srs = None if config.has_option(layer_section, 'wms_srs'): layer_wms_srs = config.get(layer_section, 'wms_srs') else: layer_wms_srs = map_wms_srs if config.has_option(layer_section, 'title'): lyr.title = config.get(layer_section, 'title') else: lyr.title = '' if config.has_option(layer_section, 'abstract'): lyr.abstract = config.get(layer_section, 'abstract') else: lyr.abstract = '' style_count = len(lyr.styles) if style_count == 0: raise ServerConfigurationError("Cannot register Layer '%s' without a style" % lyr.name) elif style_count == 1: style_obj = tmp_map.find_style(lyr.styles[0]) style_name = lyr.styles[0] meta_s = extract_named_rules(style_obj) if meta_s: self.meta_styles['%s_meta' % lyr.name] = meta_s if hasattr(lyr,'abstract'): name_ = lyr.abstract else: name_ = lyr.name meta_layer_name = '%s:%s' % (name_,'-'.join(meta_s.names)) meta_layer_name = meta_layer_name.replace(' ','_') self.meta_styles[meta_layer_name] = meta_s meta_lyr = common.copy_layer(lyr) meta_lyr.meta_style = meta_layer_name meta_lyr.name = meta_layer_name meta_lyr.wmsextrastyles = () meta_lyr.defaultstyle = meta_layer_name meta_lyr.wms_srs = layer_wms_srs self.ordered_layers.append(meta_lyr) self.meta_layers[meta_layer_name] = meta_lyr print meta_layer_name if style_name not in self.aggregatestyles.keys() and style_name not in self.styles.keys(): self.register_style(style_name, style_obj) # must copy layer here otherwise we'll segfault lyr_ = common.copy_layer(lyr) lyr_.wms_srs = layer_wms_srs self.register_layer(lyr_, style_name, extrastyles=(style_name,)) elif style_count > 1: for style_name in lyr.styles: style_obj = tmp_map.find_style(style_name) meta_s = extract_named_rules(style_obj) if meta_s: self.meta_styles['%s_meta' % lyr.name] = meta_s if hasattr(lyr,'abstract'): name_ = lyr.abstract else: name_ = lyr.name meta_layer_name = '%s:%s' % (name_,'-'.join(meta_s.names)) meta_layer_name = meta_layer_name.replace(' ','_') self.meta_styles[meta_layer_name] = meta_s meta_lyr = common.copy_layer(lyr) meta_lyr.meta_style = meta_layer_name print meta_layer_name meta_lyr.name = meta_layer_name meta_lyr.wmsextrastyles = () meta_lyr.defaultstyle = meta_layer_name meta_lyr.wms_srs = layer_wms_srs self.ordered_layers.append(meta_lyr) self.meta_layers[meta_layer_name] = meta_lyr if style_name not in self.aggregatestyles.keys() and style_name not in self.styles.keys(): self.register_style(style_name, style_obj) aggregates = tuple([sty for sty in lyr.styles]) aggregates_name = '%s_aggregates' % lyr.name self.register_aggregate_style(aggregates_name,aggregates) # must copy layer here otherwise we'll segfault lyr_ = common.copy_layer(lyr) lyr_.wms_srs = layer_wms_srs self.register_layer(lyr_, aggregates_name, extrastyles=aggregates) def register_layer(self, layer, defaultstyle, extrastyles=()): layername = layer.name if not layername: raise ServerConfigurationError('Attempted to register an unnamed layer.') if not layer.wms_srs and not re.match('^\+init=epsg:\d+$', layer.srs) and not re.match('^\+proj=.*$', layer.srs): raise ServerConfigurationError('Attempted to register a layer without an epsg projection defined.') if defaultstyle not in self.styles.keys() + self.aggregatestyles.keys(): raise ServerConfigurationError('Attempted to register a layer with an non-existent default style.') layer.wmsdefaultstyle = defaultstyle if isinstance(extrastyles, tuple): for stylename in extrastyles: if type(stylename) == type(''): if stylename not in self.styles.keys() + self.aggregatestyles.keys(): raise ServerConfigurationError('Attempted to register a layer with an non-existent extra style.') else: ServerConfigurationError('Attempted to register a layer with an invalid extra style name.') layer.wmsextrastyles = extrastyles else: raise ServerConfigurationError('Layer "%s" was passed an invalid list of extra styles. List must be a tuple of strings.' % layername) layerproj = common.Projection(layer.srs) env = layer.envelope() llp = layerproj.inverse(Coord(env.minx, env.miny)) urp = layerproj.inverse(Coord(env.maxx, env.maxy)) if self.latlonbb is None: self.latlonbb = Envelope(llp, urp) else: self.latlonbb.expand_to_include(Envelope(llp, urp)) self.ordered_layers.append(layer) self.layers[layername] = layer def register_style(self, name, style): if not name: raise ServerConfigurationError('Attempted to register a style without providing a name.') if name in self.aggregatestyles.keys() or name in self.styles.keys(): raise ServerConfigurationError("Attempted to register a style with a name already in use: '%s'" % name) if not isinstance(style, Style): raise ServerConfigurationError('Bad style object passed to register_style() for style "%s".' % name) self.styles[name] = style def register_aggregate_style(self, name, stylenames): if not name: raise ServerConfigurationError('Attempted to register an aggregate style without providing a name.') if name in self.aggregatestyles.keys() or name in self.styles.keys(): raise ServerConfigurationError('Attempted to register an aggregate style with a name already in use.') self.aggregatestyles[name] = [] for stylename in stylenames: if stylename not in self.styles.keys(): raise ServerConfigurationError('Attempted to register an aggregate style containing a style that does not exist.') self.aggregatestyles[name].append(stylename) def finalize(self): if len(self.layers) == 0: raise ServerConfigurationError('No layers defined!') if len(self.styles) == 0: raise ServerConfigurationError('No styles defined!') for layer in self.layers.values(): for style in list(layer.styles) + list(layer.wmsextrastyles): if style not in self.styles.keys() + self.aggregatestyles.keys(): raise ServerConfigurationError('Layer "%s" refers to undefined style "%s".' % (layer.name, style))
class BaseWMSFactory: def __init__(self, configpath=None): self.layers = {} self.ordered_layers = [] self.styles = {} self.aggregatestyles = {} self.map_attributes = {} self.map_scale = 1 self.meta_styles = {} self.meta_layers = {} self.configpath = configpath self.latlonbb = None def loadXML(self, xmlfile=None, strict=False, xmlstring='', basepath=''): config = ConfigParser.SafeConfigParser() map_wms_srs = None if self.configpath: config.readfp(open(self.configpath)) if config.has_option('map', 'wms_srs'): map_wms_srs = config.get('map', 'wms_srs') tmp_map = Map(0, 0) if xmlfile: load_map(tmp_map, xmlfile, strict) elif xmlstring: load_map_from_string(tmp_map, xmlstring, strict, basepath) else: raise ServerConfigurationError( "Mapnik configuration XML is not specified - 'xmlfile' and 'xmlstring' variables are empty.\ Please set one of this variables to load mapnik map object.") # get the map scale if tmp_map.parameters: if tmp_map.parameters['scale']: self.map_scale = float(tmp_map.parameters['scale']) # parse map level attributes if tmp_map.background: self.map_attributes['bgcolor'] = tmp_map.background if tmp_map.buffer_size: self.map_attributes['buffer_size'] = tmp_map.buffer_size for lyr in tmp_map.layers: layer_section = 'layer_%s' % lyr.name layer_wms_srs = None if config.has_option(layer_section, 'wms_srs'): layer_wms_srs = config.get(layer_section, 'wms_srs') else: layer_wms_srs = map_wms_srs if config.has_option(layer_section, 'title'): lyr.title = config.get(layer_section, 'title') else: lyr.title = '' if config.has_option(layer_section, 'abstract'): lyr.abstract = config.get(layer_section, 'abstract') else: lyr.abstract = '' style_count = len(lyr.styles) if style_count == 0: raise ServerConfigurationError( "Cannot register Layer '%s' without a style" % lyr.name) elif style_count == 1: style_obj = tmp_map.find_style(lyr.styles[0]) style_name = lyr.styles[0] meta_s = extract_named_rules(style_obj) if meta_s: self.meta_styles['%s_meta' % lyr.name] = meta_s if hasattr(lyr, 'abstract'): name_ = lyr.abstract else: name_ = lyr.name meta_layer_name = '%s:%s' % (name_, '-'.join(meta_s.names)) meta_layer_name = meta_layer_name.replace(' ', '_') self.meta_styles[meta_layer_name] = meta_s meta_lyr = common.copy_layer(lyr) meta_lyr.meta_style = meta_layer_name meta_lyr.name = meta_layer_name meta_lyr.wmsextrastyles = () meta_lyr.defaultstyle = meta_layer_name meta_lyr.wms_srs = layer_wms_srs self.ordered_layers.append(meta_lyr) self.meta_layers[meta_layer_name] = meta_lyr print meta_layer_name if style_name not in self.aggregatestyles.keys( ) and style_name not in self.styles.keys(): self.register_style(style_name, style_obj) # must copy layer here otherwise we'll segfault lyr_ = common.copy_layer(lyr) lyr_.wms_srs = layer_wms_srs self.register_layer(lyr_, style_name, extrastyles=(style_name, )) elif style_count > 1: for style_name in lyr.styles: style_obj = tmp_map.find_style(style_name) meta_s = extract_named_rules(style_obj) if meta_s: self.meta_styles['%s_meta' % lyr.name] = meta_s if hasattr(lyr, 'abstract'): name_ = lyr.abstract else: name_ = lyr.name meta_layer_name = '%s:%s' % (name_, '-'.join( meta_s.names)) meta_layer_name = meta_layer_name.replace(' ', '_') self.meta_styles[meta_layer_name] = meta_s meta_lyr = common.copy_layer(lyr) meta_lyr.meta_style = meta_layer_name print meta_layer_name meta_lyr.name = meta_layer_name meta_lyr.wmsextrastyles = () meta_lyr.defaultstyle = meta_layer_name meta_lyr.wms_srs = layer_wms_srs self.ordered_layers.append(meta_lyr) self.meta_layers[meta_layer_name] = meta_lyr if style_name not in self.aggregatestyles.keys( ) and style_name not in self.styles.keys(): self.register_style(style_name, style_obj) aggregates = tuple([sty for sty in lyr.styles]) aggregates_name = '%s_aggregates' % lyr.name self.register_aggregate_style(aggregates_name, aggregates) # must copy layer here otherwise we'll segfault lyr_ = common.copy_layer(lyr) lyr_.wms_srs = layer_wms_srs self.register_layer(lyr_, aggregates_name, extrastyles=aggregates) if 'default' in aggregates: sys.stderr.write( "Warning: Multi-style layer '%s' contains a regular style named 'default'. \ This style will effectively be hidden by the 'all styles' default style for multi-style layers.\n" % lyr_.name) def register_layer(self, layer, defaultstyle, extrastyles=()): layername = layer.name if not layername: raise ServerConfigurationError( 'Attempted to register an unnamed layer.') if not layer.wms_srs and not re.match('^\+init=epsg:\d+$', layer.srs) and not re.match( '^\+proj=.*$', layer.srs): raise ServerConfigurationError( 'Attempted to register a layer without an epsg projection defined.' ) if defaultstyle not in self.styles.keys() + self.aggregatestyles.keys( ): raise ServerConfigurationError( 'Attempted to register a layer with an non-existent default style.' ) layer.wmsdefaultstyle = defaultstyle if isinstance(extrastyles, tuple): for stylename in extrastyles: if type(stylename) == type(''): if stylename not in self.styles.keys( ) + self.aggregatestyles.keys(): raise ServerConfigurationError( 'Attempted to register a layer with an non-existent extra style.' ) else: ServerConfigurationError( 'Attempted to register a layer with an invalid extra style name.' ) layer.wmsextrastyles = extrastyles else: raise ServerConfigurationError( 'Layer "%s" was passed an invalid list of extra styles. List must be a tuple of strings.' % layername) layerproj = common.Projection(layer.srs) env = layer.envelope() llp = layerproj.inverse(Coord(env.minx, env.miny)) urp = layerproj.inverse(Coord(env.maxx, env.maxy)) if self.latlonbb is None: self.latlonbb = Envelope(llp, urp) else: self.latlonbb.expand_to_include(Envelope(llp, urp)) self.ordered_layers.append(layer) self.layers[layername] = layer def register_style(self, name, style): if not name: raise ServerConfigurationError( 'Attempted to register a style without providing a name.') if name in self.aggregatestyles.keys() or name in self.styles.keys(): raise ServerConfigurationError( "Attempted to register a style with a name already in use: '%s'" % name) if not isinstance(style, Style): raise ServerConfigurationError( 'Bad style object passed to register_style() for style "%s".' % name) self.styles[name] = style def register_aggregate_style(self, name, stylenames): if not name: raise ServerConfigurationError( 'Attempted to register an aggregate style without providing a name.' ) if name in self.aggregatestyles.keys() or name in self.styles.keys(): raise ServerConfigurationError( 'Attempted to register an aggregate style with a name already in use.' ) self.aggregatestyles[name] = [] for stylename in stylenames: if stylename not in self.styles.keys(): raise ServerConfigurationError( 'Attempted to register an aggregate style containing a style that does not exist.' ) self.aggregatestyles[name].append(stylename) def finalize(self): if len(self.layers) == 0: raise ServerConfigurationError('No layers defined!') if len(self.styles) == 0: raise ServerConfigurationError('No styles defined!') for layer in self.layers.values(): for style in list(layer.styles) + list(layer.wmsextrastyles): if style not in self.styles.keys() + self.aggregatestyles.keys( ): raise ServerConfigurationError( 'Layer "%s" refers to undefined style "%s".' % (layer.name, style))
class BaseWMSFactory: def __init__(self, configpath=None): self.layers = {} self.ordered_layers = [] self.styles = {} self.aggregatestyles = {} self.map_attributes = {} self.meta_styles = {} self.meta_layers = {} self.configpath = configpath self.latlonbb = None #定义方法:加载XML配置文件 def loadXML(self, xmlfile=None, strict=False, xmlstring='', basepath=''): config = ConfigParser.SafeConfigParser() #声明变量,用于保存 map中的wms_srs map_wms_srs = None if self.configpath: config.readfp(open(self.configpath)) if config.has_option('map', 'wms_srs'): map_wms_srs = config.get('map', 'wms_srs') #声明变量tmp_map保存Map(0,0),Map从mapnik模块中导入,此处详见doc/mapnik_help.text tmp_map = Map(0, 0) #支持文件模式和字符串格式的输入 if xmlfile: load_map(tmp_map, xmlfile, strict) elif xmlstring: load_map_from_string(tmp_map, xmlstring, strict, basepath) else: #差错机制 raise ServerConfigurationError( "Mapnik configuration XML is not specified - 'xmlfile' and 'xmlstring' variables are empty.\ Please set one of this variables to load mapnik map object.") # parse map level attributes #解析地图图层特征参数 #背景颜色(待查) if tmp_map.background: self.map_attributes['bgcolor'] = tmp_map.background #buffer大小(待查) if tmp_map.buffer_size: self.map_attributes['buffer_size'] = tmp_map.buffer_size #对tmp_map中layers中所有lyr,进行参数解析 for lyr in tmp_map.layers: layer_section = 'layer_%s' % lyr.name layer_wms_srs = None if config.has_option(layer_section, 'wms_srs'): layer_wms_srs = config.get(layer_section, 'wms_srs') else: layer_wms_srs = map_wms_srs if config.has_option(layer_section, 'title'): lyr.title = config.get(layer_section, 'title') else: lyr.title = '' if config.has_option(layer_section, 'abstract'): lyr.abstract = config.get(layer_section, 'abstract') else: lyr.abstract = '' style_count = len(lyr.styles) #必须设定有lyr.styles if style_count == 0: raise ServerConfigurationError( "Cannot register Layer '%s' without a style" % lyr.name) elif style_count == 1: #.find_style方法为mapnik中Map类的方法????? style_obj = tmp_map.find_style(lyr.styles[0]) style_name = lyr.styles[0] # 对style_obj进行处理,提取参数返回为 style类 meta_s = extract_named_rules(style_obj) if meta_s: # BaseWMSFactory类的meta_styles属性 self.meta_styles['%s_meta' % lyr.name] = meta_s # 判断lyr是否含有abstract属性 if hasattr(lyr, 'abstract'): name_ = lyr.abstract else: name_ = lyr.name # 将meta_s.names中的字符串序列用“-”连接 meta_layer_name = '%s:%s' % (name_, '-'.join(meta_s.names)) # 将meta_layer_name中的空格全部替换为“_” meta_layer_name = meta_layer_name.replace(' ', '_') self.meta_styles[meta_layer_name] = meta_s meta_lyr = common.copy_layer(lyr) meta_lyr.meta_style = meta_layer_name meta_lyr.name = meta_layer_name meta_lyr.wmsextrastyles = () meta_lyr.defaultstyle = meta_layer_name meta_lyr.wms_srs = layer_wms_srs self.ordered_layers.append(meta_lyr) self.meta_layers[meta_layer_name] = meta_lyr print meta_layer_name # 如果aggregatestyles和styles中没有style_name的关键字,则注册style。.register_style为本类定义的方法 if style_name not in self.aggregatestyles.keys( ) and style_name not in self.styles.keys(): self.register_style(style_name, style_obj) # must copy layer here otherwise we'll segfault # c此处必须拷贝图层,否则将出现段错误 # common lyr_ = common.copy_layer(lyr) lyr_.wms_srs = layer_wms_srs #register_layer为本类定义的一个方法, self.register_layer(lyr_, style_name, extrastyles=(style_name, )) # 当style_count > 1时,处理步骤与style_count = 1时大致相同, elif style_count > 1: for style_name in lyr.styles: style_obj = tmp_map.find_style(style_name) meta_s = extract_named_rules(style_obj) if meta_s: self.meta_styles['%s_meta' % lyr.name] = meta_s if hasattr(lyr, 'abstract'): name_ = lyr.abstract else: name_ = lyr.name meta_layer_name = '%s:%s' % (name_, '-'.join( meta_s.names)) meta_layer_name = meta_layer_name.replace(' ', '_') self.meta_styles[meta_layer_name] = meta_s meta_lyr = common.copy_layer(lyr) meta_lyr.meta_style = meta_layer_name print meta_layer_name meta_lyr.name = meta_layer_name meta_lyr.wmsextrastyles = () meta_lyr.defaultstyle = meta_layer_name meta_lyr.wms_srs = layer_wms_srs self.ordered_layers.append(meta_lyr) self.meta_layers[meta_layer_name] = meta_lyr if style_name not in self.aggregatestyles.keys( ) and style_name not in self.styles.keys(): self.register_style(style_name, style_obj) # 与style_count = 1时的不同之处, aggregates = tuple([sty for sty in lyr.styles]) aggregates_name = '%s_aggregates' % lyr.name self.register_aggregate_style(aggregates_name, aggregates) # must copy layer here otherwise we'll segfault lyr_ = common.copy_layer(lyr) lyr_.wms_srs = layer_wms_srs self.register_layer(lyr_, aggregates_name, extrastyles=aggregates) if 'default' in aggregates: sys.stderr.write( "Warning: Multi-style layer '%s' contains a regular style named 'default'. \ This style will effectively be hidden by the 'all styles' default style for multi-style layers.\n" % lyr_.name) #注册图层 def register_layer(self, layer, defaultstyle, extrastyles=()): layername = layer.name #差错机制,检测相关参数是否有效 if not layername: #ServerConfigurationError为从ogcserver.exceptions中导入的方法,执行内容为空 raise ServerConfigurationError( 'Attempted to register an unnamed layer.') if not layer.wms_srs and not re.match('^\+init=epsg:\d+$', layer.srs) and not re.match( '^\+proj=.*$', layer.srs): raise ServerConfigurationError( 'Attempted to register a layer without an epsg projection defined.' ) if defaultstyle not in self.styles.keys() + self.aggregatestyles.keys( ): raise ServerConfigurationError( 'Attempted to register a layer with an non-existent default style.' ) layer.wmsdefaultstyle = defaultstyle # 判断是否为tuple类型,('a',)为tuple类型,aggregates也为tuple类型 # type(('a',))输出为 tuple if isinstance(extrastyles, tuple): # for stylename in extrastyles: # 如果stylename类型为str if type(stylename) == type(''): if stylename not in self.styles.keys( ) + self.aggregatestyles.keys(): raise ServerConfigurationError( 'Attempted to register a layer with an non-existent extra style.' ) else: ServerConfigurationError( 'Attempted to register a layer with an invalid extra style name.' ) # wmsextrastyles???? layer.wmsextrastyles = extrastyles else: raise ServerConfigurationError( 'Layer "%s" was passed an invalid list of extra styles. List must be a tuple of strings.' % layername) # 调用common中Projection layerproj = common.Projection(layer.srs) env = layer.envelope() llp = layerproj.inverse(Coord(env.minx, env.miny)) urp = layerproj.inverse(Coord(env.maxx, env.maxy)) if self.latlonbb is None: self.latlonbb = Envelope(llp, urp) else: self.latlonbb.expand_to_include(Envelope(llp, urp)) self.ordered_layers.append(layer) self.layers[layername] = layer # 注册style def register_style(self, name, style): # 差错处理,是否输入name,name是否已经存在,style类型是否正确 if not name: raise ServerConfigurationError( 'Attempted to register a style without providing a name.') if name in self.aggregatestyles.keys() or name in self.styles.keys(): raise ServerConfigurationError( "Attempted to register a style with a name already in use: '%s'" % name) if not isinstance(style, Style): raise ServerConfigurationError( 'Bad style object passed to register_style() for style "%s".' % name) # 在对象的style属性的dict中添加style self.styles[name] = style # 注册aggregatestyles def register_aggregate_style(self, name, stylenames): if not name: raise ServerConfigurationError( 'Attempted to register an aggregate style without providing a name.' ) if name in self.aggregatestyles.keys() or name in self.styles.keys(): raise ServerConfigurationError( 'Attempted to register an aggregate style with a name already in use.' ) self.aggregatestyles[name] = [] for stylename in stylenames: if stylename not in self.styles.keys(): raise ServerConfigurationError( 'Attempted to register an aggregate style containing a style that does not exist.' ) # 在对象的aggregatestyles属性的dict中添加name关键字,及其内容 self.aggregatestyles[name].append(stylename) def finalize(self): if len(self.layers) == 0: raise ServerConfigurationError('No layers defined!') if len(self.styles) == 0: raise ServerConfigurationError('No styles defined!') for layer in self.layers.values(): for style in list(layer.styles) + list(layer.wmsextrastyles): if style not in self.styles.keys() + self.aggregatestyles.keys( ): raise ServerConfigurationError( 'Layer "%s" refers to undefined style "%s".' % (layer.name, style))