Abstract: The present invention is directed towards systems and methods for efficient Xpath matching of a document comprising Extensible Markup Language (XML) or JavaScript Object Notation (JSON). A Xpath engine identifies an Xpath expression for processing values in the document, which is represented by a stack of nodes. The device may traverse the stack from top to bottom to match each step of the Xpath expression to a type and name of one or more nodes in the stack. The device may store a flag in each node that matches a step of the Xpath expression. Responsive to encountering a leaf node, the device may trace bottom to top from the leaf node to one or more flagged nodes in the stack and compare each flagged node against a corresponding step of the path expression. Responsive to the tracing of the flagged nodes, the device determines if the path expression is matched.

Abstract: Systems and methods are described for efficiently processing, searching and/or rewriting variable width encoded data, such as UTF-8 encoded data, will be described. Embodiments of the systems and methods modify and adapt search algorithms, such as the Horspool and Wu-Manber algorithms, to efficiently process and manage searching of variable width encoded text in large blocks of text, such as text that may be carried via a stream of packets thru a network device, such as an intermediary device.

Abstract: Systems and methods are described for efficiently processing, searching and/or rewriting variable width encoded data, such as UTF-8 encoded data, will be described. Embodiments of the systems and methods modify and adapt search algorithms, such as the Horspool and Wu-Manber algorithms, to efficiently process and manage searching of variable width encoded text in large blocks of text, such as text that may be carried via a stream of packets thru a network device, such as an intermediary device.

Abstract: The present invention is directed towards systems and methods for efficient Xpath matching of a document comprising Extensible Markup Language (XML) or JavaScript Object Notation (JSON). A Xpath engine identifies an Xpath expression for processing values in the document, which is represented by a stack of nodes. The device may traverse the stack from top to bottom to match each step of the Xpath expression to a type and name of one or more nodes in the stack. The device may store a flag in each node that matches a step of the Xpath expression. Responsive to encountering a leaf node, the device may trace bottom to top from the leaf node to one or more flagged nodes in the stack and compare each flagged node against a corresponding step of the path expression. Responsive to the tracing of the flagged nodes, the device determines if the path expression is matched.