1 files changed, 106 insertions, 0 deletions
diff --git a/python/qpid/mimetype.py b/python/qpid/mimetype.py
new file mode 100644
index 0000000000..f512996b9f
--- /dev/null
+++ b/python/qpid/mimetype.py
@@ -0,0 +1,106 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+import re, rfc822
+from lexer import Lexicon, LexError
+from parser import Parser, ParseError
+
+l = Lexicon()
+
+LPAREN = l.define("LPAREN", r"\(")
+RPAREN = l.define("LPAREN", r"\)")
+SLASH = l.define("SLASH", r"/")
+SEMI = l.define("SEMI", r";")
+EQUAL = l.define("EQUAL", r"=")
+TOKEN = l.define("TOKEN", r'[^()<>@,;:\\"/\[\]?= ]+')
+STRING = l.define("STRING", r'"(?:[^\\"]|\\.)*"')
+WSPACE = l.define("WSPACE", r"[ \n\r\t]+")
+EOF = l.eof("EOF")
+
+LEXER = l.compile()
+
+def lex(st):
+  return LEXER.lex(st)
+
+class MimeTypeParser(Parser):
+
+  def __init__(self, tokens):
+    Parser.__init__(self, [t for t in tokens if t.type is not WSPACE])
+
+  def parse(self):
+    result = self.mimetype()
+    self.eat(EOF)
+    return result
+
+  def mimetype(self):
+    self.remove_comments()
+    self.reset()
+
+    type = self.eat(TOKEN).value.lower()
+    self.eat(SLASH)
+    subtype = self.eat(TOKEN).value.lower()
+
+    params = []
+    while True:
+      if self.matches(SEMI):
+        params.append(self.parameter())
+      else:
+        break
+
+    return type, subtype, params
+
+  def remove_comments(self):
+    while True:
+      self.eat_until(LPAREN, EOF)
+      if self.matches(LPAREN):
+        self.remove(*self.comment())
+      else:
+        break
+
+  def comment(self):
+    start = self.eat(LPAREN)
+
+    while True:
+      self.eat_until(LPAREN, RPAREN)
+      if self.matches(LPAREN):
+        self.comment()
+      else:
+        break
+
+    end = self.eat(RPAREN)
+    return start, end
+
+  def parameter(self):
+    self.eat(SEMI)
+    name = self.eat(TOKEN).value
+    self.eat(EQUAL)
+    value = self.value()
+    return name, value
+
+  def value(self):
+    if self.matches(TOKEN):
+      return self.eat().value
+    elif self.matches(STRING):
+      return rfc822.unquote(self.eat().value)
+    else:
+      raise ParseError(self.next(), TOKEN, STRING)
+
+def parse(addr):
+  return MimeTypeParser(lex(addr)).parse()
+
+__all__ = ["parse", "ParseError"]