CN110109672A - A kind of analyzing and processing method and device of expression formula - Google Patents

A kind of analyzing and processing method and device of expression formula Download PDF

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Publication number
CN110109672A
CN110109672A CN201910309202.7A CN201910309202A CN110109672A CN 110109672 A CN110109672 A CN 110109672A CN 201910309202 A CN201910309202 A CN 201910309202A CN 110109672 A CN110109672 A CN 110109672A
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expression
common
goal
formula
node
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CN110109672B (en
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程诗尧
覃永靖
王彬
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Beijing Qianxin Technology Co Ltd
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Beijing Qianxin Technology Co Ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00Arrangements for software engineering
    • G06F8/40Transformation of program code
    • G06F8/41Compilation
    • G06F8/42Syntactic analysis
    • G06F8/427Parsing

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  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
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Abstract

The embodiment of the invention discloses a kind of analyzing and processing method of expression formula and devices, method includes: to count to all expression formulas of event handling language in current network security regulation engine, the statistical magnitude of each expression formula is obtained, and common expression is determined according to the statistical magnitude of each expression formula;When parsing to the goal expression of the event handling language, if judging to know the goal expression as common expression, judge whether the corresponding target common expression of the goal expression parses;If the target common expression is parsed, according to the parsing result of the target common expression, the parsing result of the goal expression is obtained.The embodiment of the present invention passes through the common expression for determining event handling language, in the resolving of expression formula, for parsed common expression, directlys adopt its parsing result, the parsing time is greatly saved, while reducing the consumption of memory.

Description

A kind of analyzing and processing method and device of expression formula
Technical field
The present embodiments relate to technical field of network security, and in particular to a kind of analyzing and processing method and dress of expression formula It sets.
Background technique
EPL (Event Process Language, event handling language) is in the DSL of network security regulation engine It is relatively broad that (Domain Specified Language, specific area language) writes middle application.
Event handling language includes a large amount of expression formula, when parsing in the prior art to event handling language, to it Expression formula is parsed one by one, and time complexity is higher, and consumes excessive memory.
Summary of the invention
Since existing method is there are the above problem, the embodiment of the present invention proposes the analyzing and processing method and dress of a kind of expression formula It sets.
In a first aspect, the embodiment of the present invention proposes a kind of analyzing and processing method of expression formula, comprising:
All expression formulas of event handling language in current network security regulation engine are counted, each expression formula is obtained Statistical magnitude, and common expression is determined according to the statistical magnitude of each expression formula;
When being parsed to the goal expression of the event handling language, if judging to know the goal expression as public affairs Coexpression formula, then judge whether the corresponding target common expression of the goal expression parses;
If the target common expression is parsed, according to the parsing result of the target common expression, institute is obtained State the parsing result of goal expression.
Second aspect, the embodiment of the present invention also propose a kind of dissection process device of expression formula, comprising:
Expression formula statistical module, for all expression formulas to event handling language in current network security regulation engine into Row statistics, obtains the statistical magnitude of each expression formula, and determine common expression according to the statistical magnitude of each expression formula;
Analysis judgment module, when being parsed for the goal expression to the event handling language, if judgement is known The goal expression is common expression, then judges whether the corresponding target common expression of the goal expression parses It crosses;
As a result module is obtained, if parsed for the target common expression, according to the target common expression Parsing result, obtain the parsing result of the goal expression.
The third aspect, the embodiment of the present invention also propose a kind of electronic equipment, comprising:
At least one processor;And
At least one processor being connect with the processor communication, in which:
The memory is stored with the program instruction that can be executed by the processor, and the processor calls described program to refer to Order is able to carry out the above method.
Fourth aspect, the embodiment of the present invention also propose a kind of non-transient computer readable storage medium, the non-transient meter Calculation machine readable storage medium storing program for executing stores computer program, and the computer program makes the computer execute the above method.
As shown from the above technical solution, the embodiment of the present invention passes through the common expression for determining event handling language, in table Up in the resolving of formula, for parsed common expression, its parsing result is directlyed adopt, when parsing is greatly saved Between, while reducing the consumption of memory.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with Other attached drawings are obtained according to these figures.
Fig. 1 is a kind of flow diagram of the analyzing and processing method for expression formula that one embodiment of the invention provides;
Fig. 2 is a kind of flow diagram of the quantity statistics for expression formula that one embodiment of the invention provides;
Fig. 3 be another embodiment of the present invention provides a kind of expression formula analyzing and processing method flow diagram;
Fig. 4 is a kind of structural schematic diagram of the dissection process device for expression formula that one embodiment of the invention provides;
Fig. 5 is the logic diagram for the electronic equipment that one embodiment of the invention provides.
Specific embodiment
With reference to the accompanying drawing, further description of the specific embodiments of the present invention.Following embodiment is only used for more Technical solution of the present invention is clearly demonstrated, and not intended to limit the protection scope of the present invention.
Fig. 1 shows a kind of flow diagram of the analyzing and processing method of expression formula provided in this embodiment, comprising:
S101, all expression formulas of event handling language in current network security regulation engine are counted, is obtained each The statistical magnitude of expression formula, and common expression is determined according to the statistical magnitude of each expression formula.
Wherein, the statistical magnitude is the number that each expression formula occurs in event handling language.
The common expression is the expression formula that frequency of occurrence is greater than 1 in event handling language.
Specifically, the event handling language in current network security regulation engine is made of several expression formulas, It in specific storing process, is stored with tree structure, each leaf node in tree structure is an expression formula.To thing When part processing language is parsed, need successively to parse each expression formula node in tree structure, and in practical mistake Cheng Zhong, there are the identical expression formula node of multiple groups, i.e. multiple groups common expression in tree structure, every group of common expression includes more A identical expression formula, the i.e. statistical magnitude of the expression formula are greater than 1.
S102, when being parsed to the goal expression of the event handling language, if the objective expression is known in judgement Formula is common expression, then judges whether the corresponding target common expression of the goal expression parses.
Wherein, the goal expression is the expression formula for being divided into common expression.
The target common expression is the corresponding common expression of the goal expression.
Specifically, after completing the expression formula statistics of event handling language, each expression to event handling language is needed Formula is parsed one by one.It is possible before illustrating the goal expression if the goal expression currently parsed is common expression It had been resolved.
If S103, the target common expression are parsed, according to the parsing result of the target common expression, obtain To the parsing result of the goal expression.
Specifically, since goal expression is common expression, goal expression and another expression formula are identical Target common expression, and be resolved before the target common expression, since expression formula is identical, parsing result is also It is identical, therefore the parsing result of target common expression can be directly used in the parsing result of goal expression.By repeating benefit With the parsing result of common expression, the resolution speed of event handling language is accelerated, is drawn to improve network security rule The performance held up.
The present embodiment can be applied in technical field of network security, by determining the common expression of event handling language, In the resolving of expression formula, for parsed common expression, its parsing result is directlyed adopt, parsing is greatly saved Time, while reducing the consumption of memory.
Further, on the basis of above method embodiment, S101 is specifically included:
It is counted using all expression formulas of the recursive fashion to event handling language, obtains the statistical number of each expression formula Amount stores statistical magnitude into common node set greater than 1 expression formula, and by all tables in the common node set It is determined as common expression up to formula.
Wherein, the common node collection is combined into the set of storage common expression.
It is convenient to store common expression in expression formula statistics by the way that common node set is arranged, at the same facilitate it is subsequent Quickly determine whether the expression formula currently parsed is common expression when expression parsing.
Further, on the basis of above method embodiment, using recursive fashion to event handling language described in S101 All expression formulas of speech are counted, and are obtained the statistical magnitude of each expression formula, are specifically included:
S1011, when counting to the current expression of event handling language, judge the current expression in general purpose table Node mapping up to formula context whether there is.
If S1012, the current expression mapped in the node it is existing, will be the present in node mapping The statistical magnitude of one destination node carries out adding 1.
If S1013, the current expression are not present in node mapping, by the current expression corresponding the Two destination nodes are added in the node mapping, and the statistical magnitude of second destination node is set as 1.
S1014, child's expression formula of the current expression is continued to count.
Wherein, the node of the general expression context maps the parsing result for storing each expression formula, for public affairs The parsing result of coexpression formula only stores once.
Specifically, above-described embodiment can also include:
If S104, the target common expression do not parse, the target common expression is parsed, and will Obtained parsing result is parsed to store into the universal nodes code mapping.
The first object node is already present expression formula in node mapping.
Second destination node is the expression formula being not present in node mapping.
The universal nodes code mapping is used to store the parsing result of each expression formula.
In specific statistic processes, as shown in Fig. 2, EPL (event handling language) is resolved to abstract syntax tree first, lead to The general expression optimizer recursion resolution abstract syntax tree is crossed, and to the corresponding expression formula of each node of the abstract syntax tree It is counted;If there is no node mappings for current expression node, current expression node is added in node mapping, and 1 is set by node counts (statistical magnitude), continues the child nodes of recursion resolution current expression node;If current expression There are node mappings for node, then are incremented by the node counts (statistical magnitude) of current expression node, no longer recursion resolution is current The child nodes of expression formula node;After abstract syntax tree traversal, node counts are greater than 1 table by traverse node mapping It is added in common node set up to formula node.
That is: for the first object node of expression formula existing in node maps, illustrate that the expression formula is public expression Formula, no longer need to be added to node need to only be mapped in node mapping in corresponding expression formula statistical magnitude+1;For The first object node of expression formula is not present in node mapping, illustrates that the expression formula did not counted, needs to add it to node In mapping, and by node map in the statistical magnitude of the expression formula be set as 1.Since each expression formula of event handling language is using tree Shape structure is stored, therefore in statistic processes, needs to carry out recursive statistics method, continues the child's expression for counting current expression Formula;If current expression without child's expression formula, counts its fraternal expression formula;If illustrating event handling without fraternal expression formula Language statistics finish, and the statistical magnitude of all unduplicated expression formulas and each expression formula, statistics are stored in node mapping at this time It is common expression that quantity, which is greater than 1,.
Each expression formula and its statistical magnitude are stored by the node mapping of general expression context, fast and easy Determine common expression.
Further, on the basis of above method embodiment, S102 is specifically included:
S1021, when being parsed to the goal expression of the event handling language, if judging, the goal expression exists In the common node set, it is determined that the goal expression is common expression.
S1022, according in universal nodes code mapping whether there is the corresponding target public expression of the goal expression The parsing result of formula, determines whether the target common expression parses.
Specifically, since in expression formula statistic processes, common expression being stored into common node set, therefore When carrying out expression parsing, directly can determine whether to be public according to whether there is current expression in common node set Expression formula, it is convenient and efficient.
After determination is common expression, if the corresponding target common expression of the common expression has been resolved It crosses, then without carrying out secondary parsing, the parsing result that target common expression is obtained directly from universal nodes code mapping is Can, the parsing time can be greatlyd save.
Referring to Fig. 3, by expression builder Recursion process abstract syntax tree, if current expression node is in common node In set, then judge in universal nodes code mapping with the presence or absence of the corresponding parsing result of current expression node, and if it exists, then The parsing result for returning to the storage of common node code mapping if it does not exist then parses current expression node, and will solution Analysis result is stored into common node code mapping;Judgement finishes in universal nodes code mapping with the presence or absence of current expression section After the corresponding parsing result of point, no longer child nodes of recursion resolution current expression node;If current expression node does not exist In common node set, then current expression node is parsed, obtain parsing result, and continued Recursion process and currently express The child nodes of formula node, until abstract syntax tree traversal finishes.
The analyzing and processing method of common expression provided in this embodiment can solve event handling language common expression The poor problem of analysis feature is handled all expression formulas of linguistic expression by preparatory change event, extracts the public affairs of expression formula Part altogether reuses the parsing result of common expression, accelerates under the premise of guaranteeing that event handling language correctly parses The resolution speed of event handling language improves the performance of network security regulation engine, reduces time complexity, meanwhile, it is public Coexpression formula parsing result can only store portion in memory, to save EMS memory occupation, reduce space complexity, save Cost.
Fig. 4 shows a kind of structural schematic diagram of the dissection process device of expression formula provided in this embodiment, described device It include: that expression formula statistical module 401, analysis judgment module 402 and result obtain module 403, in which:
The expression formula statistical module 401 is used for all tables to event handling language in current network security regulation engine It is counted up to formula, obtains the statistical magnitude of each expression formula, and common expression is determined according to the statistical magnitude of each expression formula;
When the analysis judgment module 402 is used to parse the goal expression of the event handling language, if sentencing It is disconnected to know that the goal expression is common expression, then whether judge the corresponding target common expression of the goal expression It is parsed;
If it is parsed for the target common expression that the result obtains module 403, public according to the target The parsing result of expression formula obtains the parsing result of the goal expression.
Specifically, institute of the expression formula statistical module 401 to event handling language in current network security regulation engine There is expression formula to be counted, obtains the statistical magnitude of each expression formula, and public expression is determined according to the statistical magnitude of each expression formula Formula;When the analysis judgment module 402 parses the goal expression of the event handling language, if judging to know described Goal expression is common expression, then judges whether the corresponding target common expression of the goal expression parses;Institute It is parsed if stating result and obtaining the target common expression of module 403, according to the parsing knot of the target common expression Fruit obtains the parsing result of the goal expression.
The present embodiment passes through the common expression for determining event handling language, in the resolving of expression formula, for solution The common expression analysed directlys adopt its parsing result, the parsing time is greatly saved, while reducing the consumption of memory.
Further, on the basis of above-mentioned apparatus embodiment, the expression formula statistical module 401, which is specifically used for using, to be passed Return mode to count all expression formulas of event handling language, obtains the statistical magnitude of each expression formula, statistical magnitude is big Expression formula in 1 is stored into common node set, and all expression formulas in the common node set is determined as public Expression formula.
Further, on the basis of above-mentioned apparatus embodiment, the expression formula statistical module 401 is specifically used for:
When counting to the current expression of event handling language, judge the current expression on general expression Node mapping hereafter whether there is;
If the current expression is existing in node mapping, by first object present in node mapping The statistical magnitude of node carries out adding 1;
If the current expression is not present in node mapping, by corresponding second target of the current expression Node is added in the node mapping, and the statistical magnitude of second destination node is set as 1;
Child's expression formula of the current expression is continued to count.
Further, on the basis of above-mentioned apparatus embodiment, the analysis judgment module 402 is specifically used for:
When being parsed to the goal expression of the event handling language, if judging the goal expression in the public affairs In conode set, it is determined that the goal expression is common expression;
According to the solution that whether there is the corresponding target common expression of the goal expression in universal nodes code mapping Analysis is as a result, determine whether the target common expression parses.
Further, on the basis of above-mentioned apparatus embodiment, described device further include:
Expression parsing module, if not parsed for the target common expression, to the target public expression Formula is parsed, and the parsing result that parsing obtains is stored into the universal nodes code mapping.
The dissection process device of expression formula described in the present embodiment can be used for executing above method embodiment, principle and Technical effect is similar, and details are not described herein again.
Referring to Fig. 5, the electronic equipment, comprising: processor (processor) 501, memory (memory) 502 and total Line 503;
Wherein,
The processor 501 and memory 502 complete mutual communication by the bus 503;
The processor 501 is used to call the program instruction in the memory 502, to execute above-mentioned each method embodiment Provided method.
The present embodiment discloses a kind of computer program product, and the computer program product includes being stored in non-transient calculating Computer program on machine readable storage medium storing program for executing, the computer program include program instruction, when described program instruction is calculated When machine executes, computer is able to carry out method provided by above-mentioned each method embodiment.
The present embodiment provides a kind of non-transient computer readable storage medium, the non-transient computer readable storage medium Computer instruction is stored, the computer instruction makes the computer execute method provided by above-mentioned each method embodiment.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member It is physically separated with being or may not be, component shown as a unit may or may not be physics list Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness Labour in the case where, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation Method described in certain parts of example or embodiment.
It is noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although reference Invention is explained in detail for previous embodiment, those skilled in the art should understand that: it still can be right Technical solution documented by foregoing embodiments is modified or equivalent replacement of some of the technical features;And this It modifies or replaces, the spirit and model of technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution It encloses.

Claims (12)

1. a kind of analyzing and processing method of expression formula is applied to technical field of network security characterized by comprising
All expression formulas of event handling language in current network security regulation engine are counted, the system of each expression formula is obtained Count number, and common expression is determined according to the statistical magnitude of each expression formula;
When being parsed to the goal expression of the event handling language, if judging to know the goal expression as public sheet Up to formula, then judge whether the corresponding target common expression of the goal expression parses;
If the target common expression is parsed, according to the parsing result of the target common expression, the mesh is obtained Mark the parsing result of expression formula.
2. the method according to claim 1, wherein all expression formulas to event handling language are united Meter, obtains the statistical magnitude of each expression formula, and determine common expression according to the statistical magnitude of each expression formula, specifically includes:
It is counted using all expression formulas of the recursive fashion to event handling language, obtains the statistical magnitude of each expression formula, it will Statistical magnitude is stored greater than 1 expression formula into common node set, and by all expression formulas in the common node set It is determined as common expression.
3. according to the method described in claim 2, it is characterized in that, described own event handling language using recursive fashion Expression formula is counted, and is obtained the statistical magnitude of each expression formula, is specifically included:
When counting to the current expression of event handling language, judge the current expression in general expression context Node mapping whether there is;
If the current expression is existing in node mapping, by first object node present in node mapping Statistical magnitude carry out plus 1;
If the current expression is not present in node mapping, by corresponding second destination node of the current expression It is added in the node mapping, and the statistical magnitude of second destination node is set as 1;
Child's expression formula of the current expression is continued to count.
4. according to the method described in claim 2, it is characterized in that, the goal expression to the event handling language into When row parsing, if judging to know, the goal expression as common expression, judges the corresponding target of the goal expression Whether common expression parses, and specifically includes:
When being parsed to the goal expression of the event handling language, if judging the goal expression in the public section In point set, it is determined that the goal expression is common expression;
According to the parsing knot that whether there is the corresponding target common expression of the goal expression in universal nodes code mapping Fruit, determines whether the target common expression parses.
5. according to the method described in claim 4, it is characterized in that, the method also includes:
If the target common expression does not parse, the target common expression is parsed, and parsing is obtained Parsing result store into the universal nodes code mapping.
6. a kind of dissection process device of expression formula is applied to technical field of network security characterized by comprising
Expression formula statistical module is united for all expression formulas to event handling language in current network security regulation engine Meter, obtains the statistical magnitude of each expression formula, and determine common expression according to the statistical magnitude of each expression formula;
Analysis judgment module, when being parsed for the goal expression to the event handling language, if judging to know described Goal expression is common expression, then judges whether the corresponding target common expression of the goal expression parses;
As a result module is obtained, if parsed for the target common expression, according to the solution of the target common expression Analysis is as a result, obtain the parsing result of the goal expression.
7. device according to claim 6, which is characterized in that the expression formula statistical module is specifically used for using recurrence side Formula counts all expression formulas of event handling language, obtains the statistical magnitude of each expression formula, by statistical magnitude greater than 1 Expression formula is stored into common node set, and all expression formulas in the common node set are determined as public expression Formula.
8. device according to claim 7, which is characterized in that the expression formula statistical module is specifically used for:
When counting to the current expression of event handling language, judge the current expression in general expression context Node mapping whether there is;
If the current expression is existing in node mapping, by first object node present in node mapping Statistical magnitude carry out plus 1;
If the current expression is not present in node mapping, by corresponding second destination node of the current expression It is added in the node mapping, and the statistical magnitude of second destination node is set as 1;
Child's expression formula of the current expression is continued to count.
9. device according to claim 7, which is characterized in that the analysis judgment module is specifically used for:
When being parsed to the goal expression of the event handling language, if judging the goal expression in the public section In point set, it is determined that the goal expression is common expression;
According to the parsing knot that whether there is the corresponding target common expression of the goal expression in universal nodes code mapping Fruit, determines whether the target common expression parses.
10. device according to claim 8, which is characterized in that described device further include:
Expression parsing module, if not parsed for the target common expression, to the target common expression into Row parsing, and the parsing result that parsing obtains is stored into the universal nodes code mapping.
11. a kind of electronic equipment characterized by comprising
At least one processor;And
At least one processor being connect with the processor communication, in which:
The memory is stored with the program instruction that can be executed by the processor, and the processor calls described program to instruct energy Enough execute method as claimed in claim 1 to 5.
12. a kind of non-transient computer readable storage medium, which is characterized in that the non-transient computer readable storage medium is deposited Computer program is stored up, the computer program makes the computer execute method as claimed in claim 1 to 5.
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