CN104052808A - Digital content acquiring method and system based on CDN - Google Patents
Digital content acquiring method and system based on CDN Download PDFInfo
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- CN104052808A CN104052808A CN201410265855.7A CN201410265855A CN104052808A CN 104052808 A CN104052808 A CN 104052808A CN 201410265855 A CN201410265855 A CN 201410265855A CN 104052808 A CN104052808 A CN 104052808A
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Abstract
The invention provides a digital content acquiring method and system based on a CDN. The method comprises the steps that a server receives the acquisition message of the digital content sent by a local client side; the server sends a first search instruction to the local client side; the local client side searches for whether the digital content is included or not in a local personal data warehouse; under the condition that the digital content is not included in the local personal data warehouse, a first search result is sent to the server; the server receives the first search result, the digital content is acquired in the centralized CDN, and the digital content is sent to the local client side; the digital content is cached in the local personal data warehouse through the local client side. Whether the cached needed digital content is included in the local personal data warehouse or not is searched for through the local client side, under the condition that the needed digital content is not included in the local personal data warehouse, the digital content is acquired in the centralized CDN through the server, and therefore unnecessary cross-operator acquisition time is reduced.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of digital content acquisition methods and system based on CDN (Content Delivery Network, content distributing network).
Background technology
Along with developing rapidly of Internet technology, online request watches the request of video frequency program to be on the increase, these are asked from different regions or operator, and centralized video distribution and management mode need a large amount of server and the network switching equipment, and this brings immense pressure to portal website.
The scheme of prior art has proposed a kind of CDN technology, and CDN technology is a kind of digital content to be distributed to the Edge Server near user from central server, thereby realizes the distributed method of access nearby of content.In the time searching required digital content, first ask the operator at this user place apart from searching and whether comprise this digital content in the nearest node in this locality, in the situation that not comprising described digital content, in the centralized node of this user place operator of continuation request, search whether comprise this digital content, in the situation that not comprising this digital content, continue to search this digital content in the nearest node of all operators, in the situation that not comprising this digital content, continue in the centralized node of all operators, to search whether comprise this digital content, until find this digital content.
But user, in the case of not finding in this operator of local domain needed number content, needs cross operator and cross-region to obtain needed number content, the user that slowed down gets the speed of needed number content.
Summary of the invention
In view of this, the invention provides a kind of digital content acquisition methods based on CDN and a kind of digital content based on CDN is obtained system, to solve in prior art user in the case of not finding in this operator of local domain needed number content, need cross operator and the cross-region to obtain needed number content, the user that slowed down gets the speed issue of needed number content.
First aspect, provides a kind of digital content acquisition methods based on CDN, comprising:
What server received digital content that local client sends obtains message;
Described in server basis, obtain message, send the first look-up command of described digital content to local client;
Local client, according to the first look-up command, is searched and whether is comprised described digital content in local personal data warehouse;
The in the situation that of not comprising described digital content in local personal data warehouse, send the first lookup result that does not comprise described digital content in described local personal data warehouse to server;
Server receives the first lookup result that does not comprise described digital content in described local personal data warehouse, obtains described digital content, and described digital content is sent to local client in concentrated content distributing network CDN;
Described digital content is cached to local personal data warehouse by local client.
Preferably, described server receives the first lookup result that does not comprise described digital content in described local personal data warehouse, in concentrated content distributing network CDN, obtain described digital content, and described digital content sent to local client, specifically comprise:
Server receives the first lookup result that does not comprise described digital content in described local personal data warehouse, to client same operator in send the second look-up command of described digital content with the nearest adjacent clients in this locality;
Adjacent clients, according to the second look-up command, is searched and whether is comprised described digital content in the personal data warehouse of this adjacent clients;
In the personal data warehouse of adjacent clients, do not comprise described digital content, send the second lookup result that does not comprise described digital content in the personal data warehouse of described adjacent clients to server;
Server receives the second lookup result that does not comprise described digital content in the personal data warehouse of described adjacent clients, obtains described digital content concentrating in CDN.
Preferably, described in concentrated content distributing network CDN, obtain described digital content after, comprising:
Server, according to the described digital content of obtaining, extracts the preference demand of described digital content, obtains the preference content of described digital content, and described preference content is sent to local client according to described preference demand in concentrated CDN;
The preference content caching that local client sends server is in local personal data warehouse.
Preferably, described method comprises:
The default maximum storage value that local client sends according to server, clears up local personal data warehouse;
The Preset Time section that local client sends according to server, upgrades local personal data warehouse.
Preferably, the preference content caching that described local client sends server, in personal data warehouse, comprising:
Local client to server send preference content be encrypted, by encrypt after preference content caching in local personal data warehouse.
Second aspect, provides a kind of digital content based on CDN to obtain system, comprising:
Server, obtains message for what receive digital content that local client sends; According to the described message of obtaining, send the first look-up command of described digital content to local client; Receive the first lookup result that does not comprise described digital content in described local personal data warehouse, in concentrated content distributing network CDN, obtain described digital content, and described digital content is sent to local client;
Local client for according to the first look-up command, is searched and whether is comprised described digital content in local personal data warehouse; The in the situation that of not comprising described digital content in local personal data warehouse, send the first lookup result that does not comprise described digital content in described local personal data warehouse to server; Described digital content is cached to local personal data warehouse.
Preferably, server, specifically for receiving the first lookup result that does not comprise described digital content in described local personal data warehouse, to client same operator in send the second look-up command of described digital content with the nearest adjacent clients in this locality;
Described system also comprises: adjacent clients;
Adjacent clients for according to the second look-up command, is searched and whether is comprised described digital content in the personal data warehouse of this adjacent clients; In the personal data warehouse of adjacent clients, do not comprise described digital content, send the second lookup result that does not comprise described digital content in the personal data warehouse of described adjacent clients to server;
Server, specifically for receiving the second lookup result that does not comprise described digital content in the personal data warehouse of described adjacent clients, obtains described digital content concentrating in CDN.
Preferably, described server, for according to the described digital content of obtaining, extracts the preference demand of described digital content, in concentrated CDN, obtain the preference content of described digital content according to described preference demand, and described preference content is sent to local client;
Local client, for by server send preference content caching to local personal data warehouse.
Preferably,
Local client, for the default maximum storage value sending according to server, clears up local personal data warehouse; The Preset Time section sending according to server, upgrades local personal data warehouse.
Preferably,
Local client, for to server send preference content be encrypted, by encrypt after preference content caching in local personal data warehouse.
The embodiment of the present invention provides a kind of digital content acquisition methods and system based on CDN, in local personal data warehouse, search the needed number content that whether comprises buffer memory by local client, the in the situation that of not comprising needed number content in local personal data warehouse, utilize server to obtain in concentrated CDN, thereby reduced the time that unnecessary cross operator obtains.
Brief description of the drawings
Fig. 1 is the method flow diagram that the embodiment of the present invention provides;
Fig. 2 is the method flow diagram that further embodiment of this invention provides;
Fig. 3 is the system configuration schematic diagram that the embodiment of the present invention provides.
Embodiment
According to prior art, in the time searching required digital content, first ask the operator at this user place apart from searching and whether comprise this digital content in the nearest node in this locality, in the situation that not comprising described digital content, in the centralized node of this user place operator of continuation request, search whether comprise this digital content, in the situation that not comprising this digital content, continue to search this digital content in the nearest node of all operators, in the situation that not comprising this digital content, continue in the centralized node of all operators, to search whether comprise this digital content, until find this digital content.But user, in the case of not finding in this operator of local domain needed number content, needs cross operator and cross-region to obtain needed number content, the user that slowed down gets the speed of needed number content.
As shown in Figure 1, for the problems referred to above, the embodiment of the present invention provides a kind of digital content acquisition methods based on CDN, comprising:
Step 101: what server received digital content that local client sends obtains message;
Step 102: obtain message described in server basis, send the first look-up command of described digital content to local client;
Step 103: local client, according to the first look-up command, is searched and whether comprised described digital content in local personal data warehouse;
Step 104: the in the situation that of not comprising described digital content in local personal data warehouse, send the first lookup result that does not comprise described digital content in described local personal data warehouse to server;
Step 105: server receives the first lookup result that does not comprise described digital content in described local personal data warehouse is obtained described digital content, and described digital content is sent to local client in concentrated content distributing network CDN;
Step 106: described digital content is cached to local personal data warehouse by local client.
According to such scheme, the applied server of the method can be traditional server apparatus, also can be the equipment that other except server have similar functions, search and whether comprise needed number content in local personal data warehouse by local client, and local client directly obtains this needed number content comprise needed number content in local personal data warehouse in the situation that, the in the situation that of not comprising needed number content in local personal data warehouse, utilize server to obtain this needed number content in concentrated CDN, thereby reduce the time that unnecessary cross operator obtains.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 2, further embodiment of this invention provides a kind of digital content acquisition methods based on CDN, comprising:
Step 201: what server received digital content that local client sends obtains message.
In embodiments of the present invention, the in the situation that of local client search needed number content, send the message of obtaining of digital content to server, server receiving digital contents obtain message.The video that for example local client search exercise question is " the 5th collection of escaping from prison ", server " the 5th collection of escaping from prison " video obtain message.
Wherein, client can be smart mobile phone, computer, panel computer etc.
Step 202: obtain message described in server basis, send the first look-up command of described digital content to local client.
Step 203: local client, according to the first look-up command, is searched and whether comprised described digital content in local personal data warehouse: video " the 5th collection of escaping from prison ".In the situation that local personal data warehouse comprises described digital content, obtain this digital content and read digital content; In local personal data warehouse, do not comprise the situation of described digital content, execution step 204.
Wherein, local personal data warehouse can be the hard disk of client, can be also the spatial cache of client self.
Step 204: local client sends the first lookup result that does not comprise described digital content in described local personal data warehouse to server.
Step 205: server receives the first lookup result that does not comprise described digital content in described local personal data warehouse, to client same operator in send the second look-up command of described digital content with the nearest adjacent clients in this locality.In the present embodiment, " adjacent clients nearest with this locality " refers to: the client nearest with local client physical distance, it is higher that setting physical distance can ensure to obtain efficiency recently to greatest extent.
Step 206: adjacent clients, according to the second look-up command, is searched and whether comprised described digital content in the personal data warehouse of this adjacent clients; Comprise described digital content in the personal data warehouse of adjacent clients, described digital content is sent to server, and perform step 209; In the personal data warehouse of adjacent clients, do not comprise described digital content execution step 207.
Wherein, client operator can be any one in movement, UNICOM, telecommunications, Netcom, Tie Tong, Wei Tong, broadcasting and TV etc.
In embodiments of the present invention, with local client same operator and the personal data warehouse nearest with this locality, can be the personal data warehouse with the adjacent clients of local client in same local area network (LAN).
Taking the operator of local client as mobile operator is as example.
The in the situation that of not comprising described digital content in local personal data warehouse, search and in mobile operator, whether comprise the client nearest with this locality, if comprise the client nearest with this locality at mobile operator, search this with the personal data warehouse of local nearest client in whether comprise described digital content.
Wherein, if the personal data warehouse of adjacent clients that should be nearest with this locality comprises described digital content, show that this and local nearest adjacent clients obtained described digital content before step 206, and this digital content has been cached in personal data warehouse.If do not comprise described digital content in the personal data warehouse of the nearest adjacent clients in this this locality, show that this and local nearest adjacent clients do not obtain described digital content or this digital content were not cached in personal data warehouse before step 206.
In addition, the speed of obtaining content due to cross operator is slower, therefore obtains the efficiency of this digital content in order to ensure client, can only be to judge whether to comprise this digital content in the personal data warehouse in operator that client is identical.
Step 207: adjacent clients sends the second lookup result that does not comprise described digital content in the personal data warehouse of described adjacent clients to server.
Step 208: server receives the second lookup result that does not comprise described digital content in the personal data warehouse of described adjacent clients, in concentrated CDN, search whether comprise described digital content, in the situation that concentrated CDN comprises described digital content, and perform step 209.
Wherein, concentrating CDN to distinguish by operator, field, take Beijing as example, and for example mobile operator comprises a concentrated CDN, and operator of UNICOM comprises a concentrated CDN.If do not comprise some digital contents in the concentrated CDN in mobile operator, and in operator of UNICOM, each end concentrates CDN to comprise this some digital content, and the client of mobile operator is obtained this some digital content to the concentrated CDN of operator of UNICOM.
Wherein, in step 208 concentrating in CDN to search whether comprise that the process of described digital content is as follows: first in the operator at the requesting client place node nearest apart from this locality, search whether comprise this digital content, in the situation that not comprising described digital content, in the centralized node of this client place operator of continuation request, search whether comprise this digital content, in the situation that not comprising this digital content, continue to search this digital content in the nearest node of all operators, in the situation that not comprising this digital content, continue in the centralized node of all operators, to search whether comprise this digital content, until find this digital content.
Step 209: described digital content is sent to local client by server; Described digital content is cached to local personal data warehouse by local client.
In actual applications, user is in the time checking a certain digital content, we can predict: this user tends to check based on this digital content other digital contents that are associated with this digital content, for example user watches video " first collection of escaping from prison " based on local client, " second collection of escaping from prison " ... after " the 5th collection of escaping from prison ", tend to continue to watch follow-up several collection of " the 5th collection of escaping from prison ", server can be according to " first collection of escaping from prison, second collection of escaping from prison ... the 5th collection of escaping from prison " history obtain message and predict local client and obtain possibly " the 6th collection of escaping from prison ".Server obtains record according to the history of client and can predict digital content type and the digital content that user likes thus, i.e. preference demand and preference content.In the present embodiment, preference demand can be label, duration, form, suffix name of digital content etc.
Based on above-mentioned situation, obtain the efficiency of digital content in order further to improve local client, accelerate local client in the upper speed that once needs the preference content of obtaining described digital content, such as local client obtains " the 6th collection of escaping from prison " etc., local client send obtain message in comprise preference demand, the present embodiment also comprises accordingly:
Step 210: server, according to the described digital content of obtaining, extracts the preference demand of described digital content is obtained the preference content of described digital content according to described preference demand, and described preference content is sent to local client in concentrated CDN; The preference content caching that local client sends server is in local personal data warehouse.
In embodiments of the present invention, in can first carry out step 209, the digital content getting is cached in local personal data warehouse, then in carry out step 210, server extracts the preference demand of this digital content, to concentrate the preference content of obtaining this digital content in CDN to send to client, by client-cache in personal data warehouse.Also can two steps carry out simultaneously.
Wherein, the preference demand of digital content can comprise multiple latitudes.As continuity latitude and relevance latitude etc.
Wherein, continuity latitude can be: for example local client gets exercise question for the video of " the 5th collection of escaping from prison ", and this preference demand can be for the follow-up exercise question video that is " the 6th collection of escaping from prison " etc.
Relevance latitude can be: the client of for example obtaining " escaping from prison ", pass through the excavation to mass data in concentrating CDN at server, judge client and can obtain the video of " anti-terrorism 24 hours ", this preference demand can be the video of " anti-terrorism 24 hours " for exercise question.
In embodiments of the present invention, by by the preference content caching of digital content in local personal data warehouse, thereby accelerated the speed of client in the follow-up preference content of obtaining digital content.
In embodiments of the present invention, local client by preference content caching to before local personal data warehouse, need to be encrypted preference content, and by the preference content caching after encrypting in local personal data warehouse.Wherein, this preference content is stored in local personal data warehouse, can be in the collapse directories of operating system, to be divided into data block according to certain rule to arrange.The in the situation that client being obtained preference content in follow-up local personal data warehouse, need to be decrypted the preference content of obtaining, to read the preference content after deciphering.
In addition, the personal data warehouse that server is client is provided with cleaning mechanism.This cleaning mechanism can comprise:
(1) local client, according to the default maximum storage value of Servers installed, is cleared up the content of buffer memory in local personal data warehouse;
Local client, according to maximum storage value or the stored ratio value in the local personal data warehouse of Servers installed, is cleared up local personal data warehouse, thereby the digital content reading is cleaned out, to ensure the follow-up buffer memory in local personal data warehouse.
(2) local client, according to the Preset Time section of Servers installed, upgrades the described preference content of buffer memory in local personal data warehouse.
In order to ensure that the content of buffer memory in local personal data warehouse is up-to-date content, the preference content of the follow-up needed number content of local client is regularly reported to server, get preference content by server and send to local client.Local client, according to the Preset Time section of Servers installed, carries out regular update to the content of buffer memory in local personal data warehouse, thus can more effectively guarantee personal data warehouse effective utilization.
The scheme providing according to above-described embodiment, in local personal data warehouse, search the needed number content that whether comprises buffer memory by local client, the in the situation that of not comprising needed number content in local personal data warehouse, personal data warehouse to adjacent clients obtains needed number content, in the personal data warehouse of adjacent clients, do not comprise needed number content, utilize server to obtain in concentrated CDN, thereby reduced the time that unnecessary cross operator obtains.
As shown in Figure 3, the embodiment of the present invention provides the digital content based on CDN to obtain system, it is characterized in that, comprising:
Server 301, obtains message for what receive digital content that local client sends; According to the described message of obtaining, send the first look-up command of described digital content to local client; Receive the first lookup result that does not comprise described digital content in described local personal data warehouse, in concentrated content distributing network CDN, obtain described digital content, and described digital content is sent to local client;
Local client 302 for according to the first look-up command, is searched and whether is comprised described digital content in local personal data warehouse; The in the situation that of not comprising described digital content in local personal data warehouse, send the first lookup result that does not comprise described digital content in described local personal data warehouse to server; Described digital content is cached to local personal data warehouse.
Further, server, specifically for receiving the first lookup result that does not comprise described digital content in described local personal data warehouse, to client same operator in send the second look-up command of described digital content with the nearest adjacent clients in this locality;
Described system also comprises: adjacent clients;
Adjacent clients 303 for according to the second look-up command, is searched and whether is comprised described digital content in the personal data warehouse of this adjacent clients; In the personal data warehouse of adjacent clients, do not comprise described digital content, send the second lookup result that does not comprise described digital content in the personal data warehouse of described adjacent clients to server;
Server, specifically for receiving the second lookup result that does not comprise described digital content in the personal data warehouse of described adjacent clients, obtains described digital content concentrating in CDN.
Further, described server, for according to the described digital content of obtaining, extracts the preference demand of described digital content, in concentrated CDN, obtain the preference content of described digital content according to described preference demand, and described preference content is sent to local client;
Local client, for by server send preference content caching to local personal data warehouse.
Wherein, client operator can be any one in movement, UNICOM, telecommunications, Netcom, Tie Tong, Wei Tong, broadcasting and TV etc.
In embodiments of the present invention, with local client same operator and the personal data warehouse nearest with this locality, can be the personal data warehouse with the adjacent clients of local client in same local area network (LAN).
Taking the operator of local client as mobile operator is as example.
The in the situation that of not comprising described digital content in local personal data warehouse, search and in mobile operator, whether comprise the client nearest with this locality, if comprise the client nearest with this locality at mobile operator, search this with the personal data warehouse of local nearest client in whether comprise described digital content.
Wherein, if should comprise described digital content with the personal data warehouse of the nearest adjacent clients in this locality, show that this and local nearest adjacent clients obtained described digital content before, and this digital content has been cached in personal data warehouse.If do not comprise described digital content in the personal data warehouse of the nearest adjacent clients in this this locality, show this with local nearest adjacent clients not obtaining before described digital content or this digital content be not cached in personal data warehouse.
In addition, the speed of obtaining content due to cross operator is slower, therefore obtains the efficiency of this digital content in order to ensure client, can only be to judge whether to comprise this digital content in the personal data warehouse in operator that client is identical.
Wherein, concentrating CDN to distinguish by operator, field, take Beijing as example, and for example mobile operator comprises a concentrated CDN, and operator of UNICOM comprises a concentrated CDN.If do not comprise some digital contents in the concentrated CDN in mobile operator, and in operator of UNICOM, each end concentrates CDN to comprise this some digital content, and the client of mobile operator is obtained this some digital content to the concentrated CDN of operator of UNICOM.
Wherein, concentrating in CDN to search whether comprise that the process of described digital content is as follows: first search whether comprise this digital content in the operator at the requesting client place node nearest apart from this locality, in the situation that not comprising described digital content, in the centralized node of this client place operator of continuation request, search whether comprise this digital content, in the situation that not comprising this digital content, continue to search this digital content in the nearest node of all operators, in the situation that not comprising this digital content, continue in the centralized node of all operators, to search whether comprise this digital content, until find this digital content.
Further,
Local client, for the default maximum storage value sending according to server, clears up local personal data warehouse; The Preset Time section sending according to server, upgrades local personal data warehouse.
Further,
Local client, for to server send preference content be encrypted, by encrypt after preference content caching in local personal data warehouse.
Wherein, the preference demand of digital content can comprise multiple latitudes.As continuity latitude and relevance latitude etc.
Wherein, continuity latitude can be: for example local client gets exercise question for the video of " the 5th collection of escaping from prison ", and this preference demand can be for the follow-up exercise question video that is " the 6th collection of escaping from prison " etc.
Relevance latitude can be: the client of for example obtaining " escaping from prison ", pass through the excavation to mass data in concentrating CDN at server, judge client and can obtain the video of " anti-terrorism 24 hours ", this preference demand can be the video of " anti-terrorism 24 hours " for exercise question.
In embodiments of the present invention, by by the preference content caching of digital content in local personal data warehouse, thereby accelerated the speed of client in the follow-up preference content of obtaining digital content.
In embodiments of the present invention, local client by preference content caching to before local personal data warehouse, need to be encrypted preference content, and by the preference content caching after encrypting in local personal data warehouse.Wherein, this preference content is stored in local personal data warehouse, can be in the collapse directories of operating system, to be divided into data block according to certain rule to arrange.The in the situation that client being obtained preference content in follow-up local personal data warehouse, need to be decrypted the preference content of obtaining, to read the preference content after deciphering.
In addition, the personal data warehouse that server is client is provided with cleaning mechanism.This cleaning mechanism can comprise:
(1) local client, according to the default maximum storage value of Servers installed, is cleared up the content of buffer memory in local personal data warehouse;
Local client, according to maximum storage value or the stored ratio value in the local personal data warehouse of Servers installed, is cleared up local personal data warehouse, thereby the digital content reading is cleaned out, to ensure the follow-up buffer memory in local personal data warehouse.
(2) local client, according to the Preset Time section of Servers installed, upgrades the described preference content of buffer memory in local personal data warehouse.
In order to ensure that the content of buffer memory in local personal data warehouse is up-to-date content, the preference content of the follow-up needed number content of local client is regularly reported to server, get preference content by server and send to local client.Local client, according to the Preset Time section of Servers installed, carries out regular update to the content of buffer memory in local personal data warehouse, thus can more effectively guarantee personal data warehouse effective utilization.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (10)
1. the digital content acquisition methods based on CDN, is characterized in that, comprising:
What server received digital content that local client sends obtains message;
Described in server basis, obtain message, send the first look-up command of described digital content to local client;
Local client, according to the first look-up command, is searched and whether is comprised described digital content in local personal data warehouse;
The in the situation that of not comprising described digital content in local personal data warehouse, send the first lookup result that does not comprise described digital content in described local personal data warehouse to server;
Server receives the first lookup result that does not comprise described digital content in described local personal data warehouse, obtains described digital content, and described digital content is sent to local client in concentrated content distributing network CDN;
Described digital content is cached to local personal data warehouse by local client.
2. method according to claim 1, it is characterized in that, described server receives the first lookup result that does not comprise described digital content in described local personal data warehouse, in concentrated content distributing network CDN, obtain described digital content, and described digital content is sent to local client, specifically comprise:
Server receives the first lookup result that does not comprise described digital content in described local personal data warehouse, to client same operator in send the second look-up command of described digital content with the nearest adjacent clients in this locality;
Adjacent clients, according to the second look-up command, is searched and whether is comprised described digital content in the personal data warehouse of this adjacent clients;
In the personal data warehouse of adjacent clients, do not comprise described digital content, send the second lookup result that does not comprise described digital content in the personal data warehouse of described adjacent clients to server;
Server receives the second lookup result that does not comprise described digital content in the personal data warehouse of described adjacent clients, obtains described digital content concentrating in CDN.
3. method according to claim 1, is characterized in that, described in concentrated content distributing network CDN, obtain described digital content after, comprising:
Server, according to the described digital content of obtaining, extracts the preference demand of described digital content, obtains the preference content of described digital content, and described preference content is sent to local client according to described preference demand in concentrated CDN;
The preference content caching that local client sends server is in local personal data warehouse.
4. method according to claim 1, is characterized in that, described method comprises:
The default maximum storage value that local client sends according to server, clears up local personal data warehouse;
The Preset Time section that local client sends according to server, upgrades local personal data warehouse.
5. method according to claim 3, is characterized in that, the preference content caching that described local client sends server, in personal data warehouse, comprising:
Local client to server send preference content be encrypted, by encrypt after preference content caching in local personal data warehouse.
6. the digital content based on CDN is obtained a system, it is characterized in that, comprising:
Server, obtains message for what receive digital content that local client sends; According to the described message of obtaining, send the first look-up command of described digital content to local client; Receive the first lookup result that does not comprise described digital content in described local personal data warehouse, in concentrated content distributing network CDN, obtain described digital content, and described digital content is sent to local client;
Local client for according to the first look-up command, is searched and whether is comprised described digital content in local personal data warehouse; The in the situation that of not comprising described digital content in local personal data warehouse, send the first lookup result that does not comprise described digital content in described local personal data warehouse to server; Described digital content is cached to local personal data warehouse.
7. system according to claim 6, it is characterized in that, server, specifically for receiving the first lookup result that does not comprise described digital content in described local personal data warehouse, to client same operator in send the second look-up command of described digital content with the nearest adjacent clients in this locality;
Described system also comprises: adjacent clients;
Adjacent clients for according to the second look-up command, is searched and whether is comprised described digital content in the personal data warehouse of this adjacent clients; In the personal data warehouse of adjacent clients, do not comprise described digital content, send the second lookup result that does not comprise described digital content in the personal data warehouse of described adjacent clients to server;
Server, specifically for receiving the second lookup result that does not comprise described digital content in the personal data warehouse of described adjacent clients, obtains described digital content concentrating in CDN.
8. system according to claim 6, it is characterized in that, described server, the described digital content of obtaining for basis, extract the preference demand of described digital content, in concentrated CDN, obtain the preference content of described digital content according to described preference demand, and described preference content is sent to local client;
Local client, for by server send preference content caching to local personal data warehouse.
9. system according to claim 6, is characterized in that,
Local client, for the default maximum storage value sending according to server, clears up local personal data warehouse; The Preset Time section sending according to server, upgrades local personal data warehouse.
10. system according to claim 8, is characterized in that,
Local client, for to server send preference content be encrypted, by encrypt after preference content caching in local personal data warehouse.
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| CN201410265855.7A CN104052808A (en) | 2014-06-13 | 2014-06-13 | Digital content acquiring method and system based on CDN |
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| Publication number | Priority date | Publication date | Assignee | Title |
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