Class: XmlCanonicalizer
- Inherits:
-
Object
- Object
- XmlCanonicalizer
- Defined in:
- lib/xmlcanonicalizer.rb
Constant Summary collapse
- BEFORE_DOC_ELEMENT =
0
- INSIDE_DOC_ELEMENT =
1
- AFTER_DOC_ELEMENT =
2
- NODE_TYPE_ATTRIBUTE =
3
- NODE_TYPE_WHITESPACE =
4
- NODE_TYPE_COMMENT =
5
- NODE_TYPE_PI =
6
- NODE_TYPE_TEXT =
7
Instance Attribute Summary collapse
-
#logger ⇒ Object
Returns the value of attribute logger.
-
#prefix_list ⇒ Object
Returns the value of attribute prefix_list.
Instance Method Summary collapse
- #add_inclusive_namespaces(prefix_list, element, visible_namespaces) ⇒ Object
- #canonicalize(document) ⇒ Object
- #canonicalize_element(element, logging = true) ⇒ Object
-
#initialize(with_comments, excl_c14n) ⇒ XmlCanonicalizer
constructor
A new instance of XmlCanonicalizer.
- #is_namespace_decl(attribute) ⇒ Object
- #is_namespace_node(namespace_uri) ⇒ Object
- #is_namespace_rendered(prefix, uri) ⇒ Object
- #is_node_visible(node) ⇒ Object
- #is_text_node(type) ⇒ Object
- #normalize_string(input, type) ⇒ Object
- #remove_whitespace(string) ⇒ Object
- #white_text?(text) ⇒ Boolean
- #write_attribute_axis(node) ⇒ Object
- #write_document_node(document) ⇒ Object
- #write_element_node(node, visible) ⇒ Object
- #write_namespace_axis(node, visible) ⇒ Object
- #write_node(node) ⇒ Object
-
#write_text_node(node, visible) ⇒ Object
input.each_byte{|b| if (b ==60 && (type == NODE_TYPE_ATTRIBUTE || is_text_node(type))) sb = sb + “<” elsif (b == 62 && is_text_node(type)) sb = sb + “>” elsif (b == 38 && (is_text_node(type) || is_text_node(type))) #Ampersand sb = sb + “&” elsif (b == 34 && is_text_node(type)) #Quote sb = sb + “"” elsif (b == 9 && is_text_node(type)) #Tabulator sb = sb + “	” elsif (b == 11 && is_text_node(type)) #CR sb = sb + “
” elsif (b == 13 && (type == NODE_TYPE_ATTRIBUTE || (is_text_node(type) && type != NODE_TYPE_WHITESPACE) || type == NODE_TYPE_COMMENT || type == NODE_TYPE_PI)) sb = sb + “
” elsif (b == 13) next else sb = sb.concat(b) end } sb end.
Constructor Details
#initialize(with_comments, excl_c14n) ⇒ XmlCanonicalizer
Returns a new instance of XmlCanonicalizer.
90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 |
# File 'lib/xmlcanonicalizer.rb', line 90 def initialize(with_comments, excl_c14n) @with_comments = with_comments @exclusive = excl_c14n @res = "" @state = BEFORE_DOC_ELEMENT @xnl = Array.new() @prevVisibleNamespacesStart = 0 @prevVisibleNamespacesEnd = 0 @visibleNamespaces = Array.new() @inclusive_namespaces = Array.new() @prefix_list = nil @rendered_prefixes = Array.new() @logger = nil#Logger.new("xmlcanonicalizer.log") #@logger.level = Logger::DEBUG end |
Instance Attribute Details
#logger ⇒ Object
Returns the value of attribute logger.
77 78 79 |
# File 'lib/xmlcanonicalizer.rb', line 77 def logger @logger end |
#prefix_list ⇒ Object
Returns the value of attribute prefix_list.
77 78 79 |
# File 'lib/xmlcanonicalizer.rb', line 77 def prefix_list @prefix_list end |
Instance Method Details
#add_inclusive_namespaces(prefix_list, element, visible_namespaces) ⇒ Object
106 107 108 109 110 111 112 113 114 115 116 117 118 |
# File 'lib/xmlcanonicalizer.rb', line 106 def add_inclusive_namespaces(prefix_list, element, visible_namespaces) namespaces = element.attributes() namespaces.each_attribute{|ns| if (ns.prefix=="xmlns") if (prefix_list.include?(ns.local_name())) visible_namespaces.push(NamespaceNode.new("xmlns:"+ns.local_name(), ns.value())) end end } parent = element.parent() add_inclusive_namespaces(prefix_list, parent, visible_namespaces) if (parent) visible_namespaces end |
#canonicalize(document) ⇒ Object
120 121 122 123 124 |
# File 'lib/xmlcanonicalizer.rb', line 120 def canonicalize(document) write_document_node(document) @logger.debug("\nCanonicalized result\n" + @res.to_s()) if @logger @res end |
#canonicalize_element(element, logging = true) ⇒ Object
126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 |
# File 'lib/xmlcanonicalizer.rb', line 126 def canonicalize_element(element, logging = true) @logger.debug("Canonicalize element:\n" + element.to_s()) if @logger @inclusive_namespaces = add_inclusive_namespaces(@prefix_list, element, @inclusive_namespaces) if (@prefix_list) @preserve_document = element.document() tmp_parent = element.parent() body_string = remove_whitespace(element.to_s().gsub("\n","").gsub("\t","").gsub("\r","")) document = Document.new(body_string) tmp_parent.delete_element(element) element = tmp_parent.add_element(document.root()) @preserve_element = element document = Document.new(element.to_s()) ns = element.namespace(element.prefix()) document.root().add_namespace(element.prefix(), ns) write_document_node(document) @logger.debug("Canonicalized result:\n" + @res.to_s()) if @logger @res end |
#is_namespace_decl(attribute) ⇒ Object
364 365 366 367 368 |
# File 'lib/xmlcanonicalizer.rb', line 364 def is_namespace_decl(attribute) #return true if (attribute.name() == "xmlns") return true if (attribute.prefix().index("xmlns") == 0) return false end |
#is_namespace_node(namespace_uri) ⇒ Object
291 292 293 |
# File 'lib/xmlcanonicalizer.rb', line 291 def is_namespace_node(namespace_uri) return (namespace_uri == "http://www.w3.org/2000/xmlns/") end |
#is_namespace_rendered(prefix, uri) ⇒ Object
295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 |
# File 'lib/xmlcanonicalizer.rb', line 295 def is_namespace_rendered(prefix, uri) is_empty_ns = prefix == nil && uri == nil if (is_empty_ns) start = 0 else start = @prevVisibleNamespacesStart end @visibleNamespaces.each{|ns| if (ns.prefix() == "xmlns:"+prefix.to_s() && ns.uri() == uri) return true end } return is_empty_ns #(@visibleNamespaces.size()-1).downto(start) {|i| # ns = @visibleNamespaces[i] # return true if (ns.prefix() == "xmlns:"+prefix.to_s() && ns.uri() == uri) # #p = ns.prefix() if (ns.prefix().index("xmlns") == 0) # #return ns.uri() == uri if (p == prefix) #} #return is_empty_ns end |
#is_node_visible(node) ⇒ Object
317 318 319 320 321 322 323 |
# File 'lib/xmlcanonicalizer.rb', line 317 def is_node_visible(node) return true if (@xnl.size() == 0) @xnl.each{|element| return true if (element == node) } return false end |
#is_text_node(type) ⇒ Object
370 371 372 373 |
# File 'lib/xmlcanonicalizer.rb', line 370 def is_text_node(type) return true if (type == NODE_TYPE_TEXT || type == NODE_TYPE_CDATA || type == NODE_TYPE_WHITESPACE) return false end |
#normalize_string(input, type) ⇒ Object
325 326 327 328 |
# File 'lib/xmlcanonicalizer.rb', line 325 def normalize_string(input, type) sb = "" return input end |
#remove_whitespace(string) ⇒ Object
375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 |
# File 'lib/xmlcanonicalizer.rb', line 375 def remove_whitespace(string) new_string = "" in_white = false string.each_byte{|b| #if (in_white && b == 32) #else if !(in_white && b == 32) new_string = new_string + b.chr() end if (b == 62) #> in_white = true end if (b == 60) #< in_white = false end } new_string end |
#white_text?(text) ⇒ Boolean
359 360 361 362 |
# File 'lib/xmlcanonicalizer.rb', line 359 def white_text?(text) return true if ((text.strip() == "") || (text.strip() == nil)) return false end |
#write_attribute_axis(node) ⇒ Object
253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 |
# File 'lib/xmlcanonicalizer.rb', line 253 def write_attribute_axis(node) list = Array.new() node.attributes.sort.each{|key, value| attr = REXML::Attribute.new(key, value) list.push(attr) if (!is_namespace_node(attr.value()) && !is_namespace_decl(attr)) # && is_node_visible( } if (!@exclusive && node.parent() != nil && node.parent().parent() != nil) cur = node.parent() while (cur != nil) #next if (cur.attributes() == nil) cur.each_attribute{|attribute| next if (attribute.prefix() != "xml") next if (attribute.prefix().index("xmlns") == 0) next if (node.namespace(attribute.prefix()) == attribute.value()) found = true list.each{|n| if (n.prefix() == "xml" && n.value() == attritbute.value()) found = true break end } next if (found) list.push(attribute) } end end list.each{|attribute| if (attribute != nil) if (attribute.name() != "xmlns") @res = @res + " " + normalize_string(attribute.to_string(), NODE_TYPE_ATTRIBUTE).gsub("'",'"') end # else # @res = @res + " " + normalize_string(attribute.name()+'="'+attribute.to_s()+'"', NODE_TYPE_ATTRIBUTE).gsub("'",'"') #end end } end |
#write_document_node(document) ⇒ Object
144 145 146 147 148 149 150 151 152 153 154 |
# File 'lib/xmlcanonicalizer.rb', line 144 def write_document_node(document) @state = BEFORE_DOC_ELEMENT if (document.class().to_s() == "REXML::Element") write_node(document) else document.each_child{|child| write_node(child) } end @res end |
#write_element_node(node, visible) ⇒ Object
181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 |
# File 'lib/xmlcanonicalizer.rb', line 181 def write_element_node(node, visible) savedPrevVisibleNamespacesStart = @prevVisibleNamespacesStart savedPrevVisibleNamespacesEnd = @prevVisibleNamespacesEnd savedVisibleNamespacesSize = @visibleNamespaces.size() state = @state state = INSIDE_DOC_ELEMENT if (visible && state == BEFORE_DOC_ELEMENT) @res = @res + "<" + node.() if (visible) write_namespace_axis(node, visible) write_attribute_axis(node) @res = @res + ">" if (visible) node.each_child{|child| write_node(child) } @res = @res + "</" +node.() + ">" if (visible) @state = AFTER_DOC_ELEMENT if (visible && state == BEFORE_DOC_ELEMENT) @prevVisibleNamespacesStart = savedPrevVisibleNamespacesStart @prevVisibleNamespacesEnd = savedPrevVisibleNamespacesEnd @visibleNamespaces.slice!(savedVisibleNamespacesSize, @visibleNamespaces.size() - savedVisibleNamespacesSize) if (@visibleNamespaces.size() > savedVisibleNamespacesSize) end |
#write_namespace_axis(node, visible) ⇒ Object
201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 |
# File 'lib/xmlcanonicalizer.rb', line 201 def write_namespace_axis(node, visible) doc = node.document() has_empty_namespace = false list = Array.new() cur = node #while ((cur != nil) && (cur != doc) && (cur.node_type() != :document)) namespaces = cur.node_namespaces() namespaces.each{|prefix| next if ((prefix == "xmlns") && (node.namespace(prefix) == "")) namespace = cur.namespace(prefix) next if (is_namespace_node(namespace)) next if (node.namespace(prefix) != cur.namespace(prefix)) next if (prefix == "xml" && namespace == "http://www.w3.org/XML/1998/namespace") next if (!is_node_visible(cur)) rendered = is_namespace_rendered(prefix, namespace) @visibleNamespaces.push(NamespaceNode.new("xmlns:"+prefix,namespace)) if (visible) if ((!rendered) && !list.include?(prefix)) list.push(prefix) end has_empty_namespace = true if (prefix == nil) } if (visible && !has_empty_namespace && !is_namespace_rendered(nil, nil)) @res = @res + ' xmlns=""' end #TODO: ns of inclusive_list #=begin if ((@prefix_list) && (node.to_s() == node.parent().to_s())) #list.push(node.prefix()) @inclusive_namespaces.each{|ns| prefix = ns.prefix().split(":")[1] list.push(prefix) if (!list.include?(prefix) && (!node.attributes.prefixes.include?(prefix))) } @prefix_list = nil end #=end list.sort!() list.insert(0, "xmlns") unless list.delete("xmlns").nil? list.each{|prefix| next if (prefix == "") next if (@rendered_prefixes.include?(prefix)) @rendered_prefixes.push(prefix) ns = node.namespace(prefix) ns = @preserve_element.namespace(prefix) if (ns == nil) @res = @res + normalize_string(" " + prefix + '="' + ns + '"', NODE_TYPE_TEXT) if (prefix == "xmlns") @res = @res + normalize_string(" xmlns:" + prefix + '="' + ns + '"', NODE_TYPE_TEXT) if (prefix != nil && prefix != "xmlns") } if (visible) @prevVisibleNamespacesStart = @prevVisibleNamespacesEnd @prevVisibleNamespacesEnd = @visibleNamespaces.size() end end |
#write_node(node) ⇒ Object
156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 |
# File 'lib/xmlcanonicalizer.rb', line 156 def write_node(node) visible = is_node_visible(node) if ((node.node_type() == :text) && white_text?(node.value())) res = node.value() res.gsub("\r\n","\n") #res = res.delete(" ").delete("\t") res.delete("\r") @res = @res + res #write_text_node(node,visible) if (@state == INSIDE_DOC_ELEMENT) return end if (node.node_type() == :text) write_text_node(node, visible) return end if (node.node_type() == :element) write_element_node(node, visible) if (!node.rendered?()) node.rendered=(true) end if (node.node_type() == :processing_instruction) end if (node.node_type() == :comment) end end |
#write_text_node(node, visible) ⇒ Object
input.each_byte{|b| if (b ==60 && (type == NODE_TYPE_ATTRIBUTE || is_text_node(type))) sb = sb + “<” elsif (b == 62 && is_text_node(type)) sb = sb + “>” elsif (b == 38 && (is_text_node(type) || is_text_node(type))) #Ampersand sb = sb + “&” elsif (b == 34 && is_text_node(type)) #Quote sb = sb + “"” elsif (b == 9 && is_text_node(type)) #Tabulator sb = sb + “	” elsif (b == 11 && is_text_node(type)) #CR sb = sb + “
” elsif (b == 13 && (type == NODE_TYPE_ATTRIBUTE || (is_text_node(type) && type != NODE_TYPE_WHITESPACE) || type == NODE_TYPE_COMMENT || type == NODE_TYPE_PI)) sb = sb + “
” elsif (b == 13) next else sb = sb.concat(b) end } sb end
353 354 355 356 357 |
# File 'lib/xmlcanonicalizer.rb', line 353 def write_text_node(node, visible) if (visible) @res = @res + normalize_string(node.value(), node.node_type()) end end |