CN103731399A - Data access method, system and device based on CDN - Google Patents
Data access method, system and device based on CDN Download PDFInfo
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- CN103731399A CN103731399A CN201210385126.6A CN201210385126A CN103731399A CN 103731399 A CN103731399 A CN 103731399A CN 201210385126 A CN201210385126 A CN 201210385126A CN 103731399 A CN103731399 A CN 103731399A
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Abstract
The invention proposes a data access method, system and device based on a CDN. The method includes the following steps that an agent CDN node receives a data access message of a client side; the agent CDN node sends the data access message to a source station; the agent CDN node receives a response message fed back by the source station, wherein the response message is relevant to data requested by the client side; the agent CDN node generates the data requested by the client side according to the response message and local data, and the data are transmitted to the client side. According to the data access method, system and device based on the CDN, the source station does not need to feed back complete data and only needs to feed back the response message relevant to the data, and therefore the amount of the data needing to be transmitted is reduced, and the access to dynamic pages can be accelerated for a user in a traditional CDN mode.
Description
Technical field
The present invention relates to communication network technology field, particularly a kind of based on CDN(ContentDelivery Network, content distributing network) data access method, system and the device of network.
Background technology
The development of the Internet brings a very large facility to life, people can stay indoors, before a computer, just can inquire various information all over the world, log in the webpage of Ge great portal website, the major issue occurring in the recent period in the world can cover all at one glance.The conceivable information of user oneself only need be inputted corresponding keyword in search column, then clicks and confirm, just having ten hundreds of relevant informations showed in moment, save the inconvenience that books and periodicals, paper and road are hurried back and forth and brought, so saved the time, can enrich our life again.
Yet, a lot of important webpages are dynamic pages at present, and so-called dynamic page or dynamic object, refer to for same URL(Uniform/Universal Resource Locator, URL(uniform resource locator)), ask all different page of possible outcome or object at every turn.Such as result of page searching.The result of the each request of this page is to be all dynamically spliced, and along with the difference of time, user's difference, or other different characteristics, have different responses.This dynamic page, cannot, by CDN buffer memory, therefore can not utilize traditional CDN to accelerate.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art.
For this reason, one object of the present invention is to propose a kind of data access method of content-based distributing network CDN network.The method makes it possible to according to the characteristic of network, transformation parameter is optimized, thereby improves the access speed of data.
Second object of the present invention is to propose a kind of data access system based on CDN network.
The 3rd object of the present invention is to propose a kind of CDN of agency node.
The 4th object of the present invention is to propose a kind of data access method based on CDN network.
The 5th object of the present invention is to propose a kind of data access system based on CDN network.
To achieve these goals, according to the data access method based on CDN network of the embodiment of first aspect present invention, comprise the following steps: act on behalf of the data access message that CDN node receives client; Act on behalf of CDN node described data access message is sent to source station; Act on behalf of the response message that CDN node receives described source station feedback, wherein, described response message is relevant to the data that described client is asked; Act on behalf of CDN node and generate according to described response message and local data the data that described client is asked, and described data are sent to described client.In an embodiment of the present invention, source station is without the data of feed back full, only need the response message that feedback is relevant to described data, therefore reduced and needed the data volume of transmission, thereby made user can apply the access that traditional CDN mode is accelerated dynamic page.
In an embodiment of the present invention, source station is without the data of feed back full, only need the response message that feedback is relevant to described data, therefore reduced and needed the data volume of transmission, thereby made user can apply the access that traditional CDN mode is accelerated dynamic page.
To achieve these goals, according to a kind of data access system based on CDN network of the proposition of the embodiment of second aspect present invention, comprise client, act on behalf of CDN node and source station, wherein, described client, for sending data access message to the described CDN node of acting on behalf of; The described CDN node of acting on behalf of, for described data access message is sent to source station, and receive the response message of described source station feedback, wherein, described response message is relevant to the data that described client is asked, and generate according to described response message and local data the data that described client is asked, and described data are sent to described client.
In an embodiment of the present invention, source station is without the data of feed back full, only need the response message that feedback is relevant to described data, therefore reduced and needed the data volume of transmission, thereby made user can apply the access that traditional CDN mode is accelerated dynamic page.
To achieve these goals, according to a kind of CDN of agency node of the proposition of the embodiment of third aspect present invention, comprise: sending module, is forwarded to source station for the data access message that client is sent; Receiver module, for receiving the response message of feedback, wherein, described response message is relevant to the data that described client is asked; And forwarding module, for generating according to described response message and local data the data that described client is asked, and described data are sent to described client.
In an embodiment of the present invention, source station is without the data of feed back full, only need the response message that feedback is relevant to described data, therefore reduced and needed the data volume of transmission, thereby made user can apply the access that traditional CDN mode is accelerated dynamic page.
To achieve these goals, according to a kind of data access method based on CDN network of the proposition of the embodiment of fourth aspect present invention, comprise the following steps: first agent CDN node receives the data access message of client; First agent CDN node is sent to second agent CDN node by described data access message; Second agent CDN node obtains data according to described data access message from source station, and generates response message according to described data, and wherein, described response message is relevant to the data that described client is asked; First agent CDN node receives the response message of described second agent CDN node feedback; First agent CDN node generates according to described response message and local data the data that described client is asked, and described data are sent to described client.
In an embodiment of the present invention, second agent CDN node is without the data of feed back full, only need the response message that feedback is relevant to described data, therefore reduced and needed the data volume of transmission, thereby made user can apply the access that traditional CDN mode is accelerated dynamic page.
To achieve these goals, according to a kind of data access system based on CDN network of the proposition of the embodiment of fifth aspect present invention, comprise client, first agent CDN node, second agent CDN node and source station, wherein, described client, for sending data access message to described first agent CDN node; First agent CDN node, for described data access message is sent to described second agent CDN node, and receive the response message of described second agent CDN node feedback, wherein, described response message is relevant to the data that described client is asked, and generate according to described response message and local data the data that described client is asked, and described data are sent to described client; Described second agent CDN node, for obtaining data according to described data access message from implementing source station, and generates response message according to described data, and described response message is sent to described first agent CDN node.
In an embodiment of the present invention, second agent CDN node is without the data of feed back full, only need the response message that feedback is relevant to described data, therefore reduced and needed the data volume of transmission, thereby made user can apply the access that traditional CDN mode is accelerated dynamic page.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Of the present invention and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:
Fig. 1 is the flow chart of the data access method based on CDN network according to an embodiment of the invention;
Fig. 2 is the structure chart of the data access system based on CDN network according to an embodiment of the invention;
Fig. 3 is a kind of according to an embodiment of the invention structured flowchart of the CDN of agency node;
Fig. 4 is the flow chart of the data access method based on CDN network in accordance with another embodiment of the present invention; And
Fig. 5 is the structure chart of the data access system based on CDN network in accordance with another embodiment of the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.On the contrary, embodiments of the invention comprise spirit and all changes within the scope of intension, modification and the equivalent that falls into additional claims.
In description of the invention, it will be appreciated that, term " first ", " second " etc. are only for describing object, and can not be interpreted as indication or hint relative importance.In description of the invention, it should be noted that, unless otherwise clearly defined and limited, term " is connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connects integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.In addition,, in description of the invention, except as otherwise noted, the implication of " a plurality of " is two or more.
In flow chart or any process of otherwise describing at this or method describe and can be understood to, represent to comprise that one or more is for realizing module, fragment or the part of code of executable instruction of the step of specific logical function or process, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can be not according to order shown or that discuss, comprise according to related function by the mode of basic while or by contrary order, carry out function, this should be understood by embodiments of the invention person of ordinary skill in the field.
Because current webpage is dynamic web page mostly, and have the content of substantial variations also few, so in the embodiment of the present invention, difference only need to be returned to partly in source station, therefore can reduce data transmission rate, thereby improve the speed of data access.
As shown in Figure 1, be the flow chart of the data access method based on CDN network according to an embodiment of the invention.
As shown in Figure 1, the data access method based on CDN network comprises the steps:
Step S101, acts on behalf of the data access message that CDN node receives client.In one embodiment of the invention, act on behalf of the benchmark version of all preserving data in CDN node and source station, the benchmark version at this by data is referred to as local data.In another embodiment of the present invention, act on behalf of in CDN node and source station and all preserve response data list, at this, also response data list can be referred to as to local data.Particularly, this response data list comprises a plurality of number information, and the corresponding response results of each number information, and these response results are also kept at and act on behalf of among CDN node simultaneously.For example, for dynamic web page, may be being all kept at and acting on behalf of among CDN node as response results of its variation, each variation may there is corresponding number information, number information only need be fed back in source station when feedback like this.
Step S102, acts on behalf of CDN node data access message is sent to source station.Wherein, as mentioned above, in source station, also preserve with act on behalf of CDN node in benchmark version or the response data list of identical data.
Step S103, source station obtains corresponding data according to described data access message.In one embodiment of the invention, these data are web data.
Step S104, source station generates response message according to these data, and wherein, the data that this response message is asked to client are relevant, and the data volume of this response message is less than the data volume of these data.Particularly, if source station and act on behalf of CDN node and all preserve benchmark version, source station further compares to generate variance data by these data and benchmark version, and according to this variance data generation response message.In another embodiment of the present invention, if source station and act on behalf of CDN node and all preserve response data list, source station is further according to this data search response data list, to obtain the number information of these data correspondence in response data list, and generate corresponding response message according to this number information.In addition, if cannot find corresponding number information by these data in response data list, source station generates response message according to these data, as known technology, does not repeat them here.
Step S105, acts on behalf of the response message that CDN node receives source station feedback.It should be noted that, act on behalf of between CDN node and source station and transmit which kind of message, for example, is variance data or number information, and it can be determined by configuration.
Step S106, acts on behalf of CDN node and generates according to response message and local data the data that client is asked.As mentioned above, the benchmark version that local data can data also can be response data list.Particularly, if response message comprises variance data, acting on behalf of CDN node needs further the benchmark version of the variance data receiving and local storage to be combined to generate the data that End-Customer end is asked.In another embodiment, if response message comprises number information, act on behalf of CDN node and further according to this number information, search local response data list of preserving to obtain corresponding data, these data should be the data that client is asked.
Step S107, acts on behalf of the data that CDN node asks according to the client obtaining and generates corresponding response message, and feed back to client.
What need to further illustrate is, the embodiment of said reference version and response data list is only the preferred embodiments of the present invention, yet in other embodiments of the invention, as long as the data volume of the data that the data volume of the data of transmission is asked than client is little.
In an embodiment of the present invention, source station is without the data of feed back full, only need the response message that feedback is relevant to described data, therefore reduced and needed the data volume of transmission, thereby made user can apply the access that traditional CDN mode is accelerated dynamic page.
As shown in Figure 2, for according to an embodiment of the invention for the structure chart of the data access system based on CDN network.
As shown in Figure 2, the data access system based on CDN network comprises client 100, acts on behalf of CDN node 200 and source station 300.
Wherein, client 100 is for sending data access message to acting on behalf of CDN node 200; In one embodiment of the invention, act on behalf of the benchmark version of all preserving data in CDN node 200 and source station 300, the benchmark version at this by data is referred to as local data.In another embodiment of the present invention, act on behalf of in CDN node 200 and source station 300 and all preserve response data list, at this, also response data list can be referred to as to local data.Particularly, this response data list comprises a plurality of number information, and the corresponding response results of each number information, and these response results are also kept at and act on behalf of among CDN node 200 simultaneously.For example, for dynamic web page, may be being all kept at and acting on behalf of among CDN node 200 as response results of its variation, each variation may there is corresponding number information, number information only need be fed back in source station 300 when feedback like this.
Act on behalf of CDN node 200, for data access message is sent to source station 300; Wherein in source station 300, preserve with act on behalf of CDN node 200 in benchmark version or the response data list of identical data.
Source station 300 obtains corresponding data according to described data access message.In one embodiment of the invention, these data are web data.
Source station 300 generates response message according to these data, and wherein, the data that this response message is asked to client are relevant, and the data volume of this response message is less than the data volume of these data.Particularly, if source station 300 and act on behalf of CDN node 200 and all preserve benchmark version, source station 300 further compares to generate variance data by these data and benchmark version, and according to this variance data generation response message.In another embodiment of the present invention, if source station 300 and act on behalf of CDN node 200 and all preserve response data list, source station 300 is further according to this data search response data list, to obtain the number information of these data correspondence in response data list, and generate corresponding response message according to this number information.In addition, if cannot find corresponding number information by these data in response data list, source station 300 generates response message according to these data, as known technology, does not repeat them here.
Acting on behalf of CDN node 200, receive the response message of source station 300 feedbacks, it should be noted that act on behalf of between CDN node 200 and source station 300 to transmit which kind of message, for example, is variance data or number information, and it can be determined by configuration.
Act on behalf of CDN node 200 and generate according to response message and local data the data that client is asked.As mentioned above, the benchmark version that local data can data also can be response data list.Particularly, if response message comprises variance data, acting on behalf of CDN node 200 needs further the benchmark version of the variance data receiving and local storage to be combined to generate the data that End-Customer end is asked.In another embodiment, if response message comprises number information, act on behalf of CDN node 200 and further according to this number information, search local response data list of preserving to obtain corresponding data, these data should be the data that client is asked.
Act on behalf of the data that CDN node 200 asks according to the client obtaining and generate corresponding response message, and feed back to client 100.
What need to further illustrate is, the embodiment of said reference version and response data list is only the preferred embodiments of the present invention, yet in other embodiments of the invention, as long as the data volume of the data that the data volume of the data of transmission is asked than client is little.
In an embodiment of the present invention, source station 300 is without the data of feed back full, only need the response message that feedback is relevant to described data, therefore reduced and needed the data volume of transmission, thereby made user can apply the access that traditional CDN mode is accelerated dynamic page.
In an embodiment of the present invention, can receive by acting on behalf of CDN node response message or the response data list of source station feedback, act on behalf of CDN node response message is generated to the data that client is asked in conjunction with local data or by the number information in response data list, and send data to client, thereby make user can apply the access that traditional CDN mode is accelerated dynamic page.
As shown in Figure 3, be a kind of according to an embodiment of the invention structured flowchart of acting on behalf of CDN node.
The CDN node of acting on behalf of as shown in Figure 3 comprises following structure.
Sending module 210, is forwarded to source station for the data access message that client is sent; Wherein, the benchmark version of data is called local data; In another embodiment of the present invention, response data list is referred to as local data.Particularly, this response data list comprises a plurality of number information, and the corresponding response results of each number information.
What need to further illustrate is, the embodiment of said reference version and response data list is only the preferred embodiments of the present invention, yet in other embodiments of the invention, as long as the data volume of the data that the data volume of the data of transmission is asked than client is little.
In an embodiment of the present invention, can receive by acting on behalf of CDN node response message or the response data list of source station feedback, act on behalf of CDN node response message is generated to the data that client is asked in conjunction with local data or by the number information in response data list, and send data to client, thereby make user can apply the access that traditional CDN mode is accelerated dynamic page.
As shown in Figure 4, be the flow chart of the data access method based on CDN network in accordance with another embodiment of the present invention.
As shown in Figure 4, the data access method based on CDN network comprises the steps:
Step S401, first agent CDN node receives the data access message of client; In one embodiment of the invention, all preserve the benchmark version of data in first agent CDN node and second agent CDN node, the benchmark version at this by data is referred to as local data.In another embodiment of the present invention, act on behalf of in CDN node and second agent CDN node and all preserve response data list, at this, also response data list can be referred to as to local data.Particularly, this response data list comprises a plurality of number information, and the corresponding response results of each number information, and these response results are also kept among first agent CDN node simultaneously.For example, for dynamic web page, may be being all kept among first agent CDN node as response results of its variation, each variation may there is corresponding number information, number information only need be fed back in source station when feedback like this.
Step S402, first agent CDN node is sent to second agent CDN node by data access message.Wherein, as mentioned above, in second agent CDN node, also preserve benchmark version or response data list with data identical in first agent CDN node.
Second agent CDN node is sent to source station by data access message.
Step S403, source station obtains corresponding data according to described data access message.In one embodiment of the invention, these data are web data.And these corresponding data are sent to second agent CDN node.
Step S404, second agent CDN node generates response message according to these data, and wherein, the data that this response message is asked to client are relevant, and the data volume of this response message is less than the data volume of these data.Particularly, if second agent CDN node and first agent CDN node are all preserved benchmark version, second agent CDN node further compares to generate variance data by these data and benchmark version, and generates response message according to this variance data.In another embodiment of the present invention, if second agent CDN node and first agent CDN node are all preserved response data list, second agent CDN node is further according to this data search response data list, to obtain the number information of these data correspondence in response data list, and generate corresponding response message according to this number information.In addition, if cannot find corresponding number information by these data in response data list, second agent CDN node generates response message according to these data, as known technology, does not repeat them here.
Step S405, first agent CDN node receives the response message of second agent CDN node feedback.It should be noted that transmit which kind of message between first agent CDN node and second agent CDN node, for example, is variance data or number information, and it can be determined by configuration.
Step S406, first agent CDN node generates according to response message and local data the data that client is asked.As mentioned above, the benchmark version that local data can data also can be response data list.Particularly, if response message comprises variance data, first agent CDN node needs further the benchmark version of the variance data receiving and local storage to be combined to generate the data that End-Customer end is asked.In another embodiment, if response message comprises number information, first agent CDN node is further searched local response data list of preserving to obtain corresponding data according to this number information, and these data should be the data that client is asked.
Step S407, the data that first agent CDN node is asked according to the client obtaining generate corresponding response message, and feed back to client.
What need to further illustrate is, the embodiment of said reference version and response data list is only the preferred embodiments of the present invention, yet in other embodiments of the invention, as long as the data volume of the data that the data volume of the data of transmission is asked than client is little.
In an embodiment of the present invention, can receive by first agent CDN node response message or the response data list of second agent CDN node feedback, first agent CDN node generates in conjunction with local data or by the number information in response data list the data that client is asked by response message, and send data to client, thereby make user can apply the access that traditional CDN mode is accelerated dynamic page.
In an embodiment of the present invention, second agent CDN node is without the data of feed back full, only need the response message that feedback is relevant to described data, therefore reduced and needed the data volume of transmission, thereby made user can apply the access that traditional CDN mode is accelerated dynamic page.
As shown in Figure 5, in accordance with another embodiment of the present invention for the structure chart of the data access system based on CDN network.
As shown in Figure 5, the data access system based on CDN network comprises:
Client 400, first agent CDN node 500, second agent CDN node 600 and source station 700.
Wherein, client 400 is for sending data access message to first agent CDN node 500; In one embodiment of the invention, all preserve the benchmark version of data in first agent CDN node 500 and second agent CDN node 600, the benchmark version at this by data is referred to as local data.In another embodiment of the present invention, in first agent CDN node 500 and second agent CDN node 600, all preserve response data list, at this, also response data list can be referred to as to local data.Particularly, this response data list comprises a plurality of number information, and the corresponding response results of each number information, and these response results are also kept among first agent CDN node 500 and second agent CDN node 600 simultaneously.For example, for dynamic web page, may be being all kept among first agent CDN node 500 as response results of its variation, each variation may there is corresponding number information, second agent CDN node 600 only need feed back number information when feedback like this.
First agent CDN node 500, for being sent to data access message second agent CDN node 600; Wherein in second agent CDN node 600, preserve benchmark version or response data list with data identical in first agent CDN node 500.
Second agent CDN node 600 is sent to source station 700 by data access message.
Source station 700 obtains corresponding data according to described data access message.In one embodiment of the invention, these data are web data, and these corresponding data are sent to second agent CDN node 600.
Second agent CDN node 600 generates response message according to these data, and wherein, this response message is relevant to the data that client 400 is asked, and the data volume of this response message is less than the data volume of these data.Particularly, if second agent CDN node 600 and first agent CDN500 node are all preserved benchmark version, second agent CDN node 600 further compares to generate variance data by these data and benchmark version, and generates response message according to this variance data.In another embodiment of the present invention, if second agent CDN node 600 and first agent CDN node 500 are all preserved response data list, second agent CDN node 600 is further according to this data search response data list, to obtain the number information of these data correspondence in response data list, and generate corresponding response message according to this number information.In addition, if cannot find corresponding number information by these data in response data list, source station generates response message according to these data, as known technology, does not repeat them here.
First agent CDN node 500, the response message that receives second agent CDN node 600 feedbacks, it should be noted that transmit which kind of message between first agent CDN node 500 and second agent CDN node 600, be for example variance data or number information, it can be determined by configuration.
First agent CDN node 500 generates according to response message and local data the data that client is asked.As mentioned above, the benchmark version that local data can data also can be response data list.Particularly, if response message comprises variance data, first agent CDN node 500 needs further the benchmark version of the variance data receiving and local storage to be combined to generate the data that End-Customer end is asked.In another embodiment, if response message comprises number information, first agent CDN node 500 is further searched local response data list of preserving to obtain corresponding data according to this number information, and these data should be the data that client is asked.
The data that first agent CDN node 500 is asked according to the client obtaining generate corresponding response message, and feed back to client 400.
What need to further illustrate is, the embodiment of said reference version and response data list is only the preferred embodiments of the present invention, yet in other embodiments of the invention, as long as the data volume of the data that the data volume of the data of transmission is asked than client 400 is little.
In an embodiment of the present invention, second agent CDN node 600 is without the data of feed back full, only need the response message that feedback is relevant to described data, therefore reduced and needed the data volume of transmission, thereby made user can apply the access that traditional CDN mode is accelerated dynamic page.
In an embodiment of the present invention, second agent CDN node is without the data of feed back full, only need the response message that feedback is relevant to described data, therefore reduced and needed the data volume of transmission, thereby made user can apply the access that traditional CDN mode is accelerated dynamic page.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, a plurality of steps or method can realize with being stored in memory and by software or the firmware of suitable instruction execution system execution.For example, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: have for data-signal being realized to the discrete logic of the logic gates of logic function, the application-specific integrated circuit (ASIC) with suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (25)
1. a data access method for content-based distributing network CDN network, is characterized in that, comprises the following steps:
Act on behalf of the data access message that CDN node receives client;
The described CDN of agency node is sent to source station by described data access message;
The described CDN of agency node receives the response message of described source station feedback, and wherein, described response message is relevant to the data that described client is asked; And
The described CDN of agency node generates according to described response message and local data the data that described client is asked, and described data are sent to described client.
2. data access method as claimed in claim 1, is characterized in that, the benchmark version of described data is all preserved in the described CDN of agency node and described source station, and wherein, the benchmark version of described data is described local data.
3. data access method as claimed in claim 1 or 2, is characterized in that, described response message comprises the variance data between described data and described benchmark version.
4. the data access method as described in claim 1-3 any one, is characterized in that, response data list is all preserved in the described CDN of agency node and described source station, and wherein, described response data list is described local data.
5. data access method as claimed in claim 4, is characterized in that, described response message comprises the number information of described data in described response data list.
6. the data access system based on CDN network, is characterized in that, comprise client, act on behalf of CDN node and source station, wherein,
Described client, for sending data access message to the described CDN node of acting on behalf of;
The described CDN node of acting on behalf of, for described data access message is sent to source station, and receive the response message of described source station feedback, wherein, described response message is relevant to the data that described client is asked, and generate according to described response message and local data the data that described client is asked, and described data are sent to described client.
7. data access system as claimed in claim 6, is characterized in that, the benchmark version of described data is all preserved in the described CDN of agency node and described source station, and wherein, the benchmark version of described data is described local data.
8. data access system as claimed in claim 7, is characterized in that, described response message comprises the variance data between described data and described benchmark version.
9. data access system as claimed in claim 6, is characterized in that, response data list is all preserved in the described CDN of agency node and described source station, and wherein, described response data list is described local data.
10. data access system as claimed in claim 9, is characterized in that, described response message comprises the number information of described data in described response data list.
Act on behalf of CDN node for 11. 1 kinds, it is characterized in that, comprising:
Sending module, is forwarded to source station for the data access message that client is sent;
Receiver module, for receiving the response message of feedback, wherein, described response message is relevant to the data that described client is asked; And
Forwarding module, for generating according to described response message and local data the data that described client is asked, and is sent to described client by described data.
The 12. CDN nodes of acting on behalf of as claimed in claim 11, is characterized in that, the benchmark version of described data is all preserved in the described CDN of agency node and described source station, and wherein, the benchmark version of described data is described local data.
The 13. CDN nodes of acting on behalf of as claimed in claim 12, is characterized in that, described response message comprises the variance data between described data and described benchmark version.
The 14. CDN nodes of acting on behalf of as claimed in claim 11, is characterized in that, response data list is all preserved in the described CDN of agency node and described source station, and wherein, described response data list is described local data.
The 15. CDN nodes of acting on behalf of as claimed in claim 14, is characterized in that, described response message comprises the number information of described data in described response data list.
16. 1 kinds of data access methods based on CDN network, is characterized in that, comprise the following steps:
First agent CDN node receives the data access message of client;
Described first agent CDN node is sent to second agent CDN node by described data access message;
Described second agent CDN node obtains data according to described data access message from source station, and generates response message according to described data, and wherein, described response message is relevant to the data that described client is asked;
Described first agent CDN node receives the response message of described second agent CDN node feedback; And
Described first agent CDN node generates according to described response message and local data the data that described client is asked, and described data are sent to described client.
17. data access methods as claimed in claim 16, is characterized in that, described first agent CDN node and described second agent CDN node are all preserved the benchmark version of described data, and wherein, the benchmark version of described data is described local data.
18. data access methods as claimed in claim 17, is characterized in that, described response message comprises the variance data between described data and described benchmark version.
19. data access methods as claimed in claim 16, is characterized in that, described first agent CDN node and described second agent CDN node are all preserved response data list, and wherein, described response data list is described local data.
20. data access methods as claimed in claim 19, is characterized in that, described response message comprises the number information of described data in described response data list.
21. 1 kinds of data access systems based on CDN network, is characterized in that, comprise client, first agent CDN node, second agent CDN node and source station, wherein,
Described client, for sending data access message to described first agent CDN node;
Described first agent CDN node, for described data access message is sent to described second agent CDN node, and receive the response message of described second agent CDN node feedback, wherein, described response message is relevant to the data that described client is asked, and generate according to described response message and local data the data that described client is asked, and described data are sent to described client; And
Described second agent CDN node, for obtaining data according to described data access message from implementing source station, and generates response message according to described data, and described response message is sent to described first agent CDN node.
22. data access systems as claimed in claim 21, is characterized in that, described first agent CDN node and described second agent CDN node are all preserved the benchmark version of described data, and wherein, the benchmark version of described data is described local data.
23. data access systems as claimed in claim 22, is characterized in that, described response message comprises the variance data between described data and described benchmark version.
24. data access systems as claimed in claim 21, is characterized in that, described first agent CDN node and described second agent CDN node are all preserved response data list, and wherein, described response data list is described local data.
25. data access systems as claimed in claim 24, is characterized in that, described response message comprises the number information of described data in described response data list.
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