CN107493231A - A kind of CDN dynamic routing method and device - Google Patents
A kind of CDN dynamic routing method and device Download PDFInfo
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- CN107493231A CN107493231A CN201610409328.8A CN201610409328A CN107493231A CN 107493231 A CN107493231 A CN 107493231A CN 201610409328 A CN201610409328 A CN 201610409328A CN 107493231 A CN107493231 A CN 107493231A
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- access request
- cdn node
- routing iinformation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/26—Route discovery packet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
- H04L45/023—Delayed use of routing table updates
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/14—Routing performance; Theoretical aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/18—Loop-free operations
Abstract
Disclosed herein is the dynamic routing method of CDN a kind of and device, methods described includes：CDN node judges whether itself is first CDN node for receiving the access request after access request is received；When the CDN node is to receive first CDN node of the access request, the CDN node inquires about the routing iinformation of the access request, the routing iinformation inquired is added to the access request, and the access request is sent according to the routing iinformation；When the CDN node is not to receive first CDN node of the access request, the CDN node obtains routing iinformation from the access request, and sends the access request according to the routing iinformation.
Description
Technical field
The present invention relates to the technology of content distributing network (CDN, Content Delivery Network) neck
Domain, more particularly to a kind of CDN dynamic routing method and device.
Background technology
Content distributing network (CDN, Content Delivery Network) is a kind of distributed caching
System, its original function are by the content caching of the originating website to the section nearer with the geographical position of user
Point, web site contents are accessed to user and play a part of acceleration.
Current CDN typically uses double-layer structure, including fringe node and two-level node.Such as Fig. 1 institutes
Show, after CDN fringe node receives the access request of user, fringe node passes through nslookup system
System (DNS, Domain Name System) obtains the address of two-level node, and according to two-level node
The access request is transmitted to the two-level node by address, and the access request is received in two-level node
Afterwards, inquiry DNS obtains the address of the source station of the access request, and the two-level node is according to source station
Location sends the access request to source station.
When it is dynamic content that user, which accesses content, because dynamic content needs real-time update, therefore, move
State content needs to obtain from corresponding source station, i.e. user accesses dynamic content and is required to Hui Yuan every time.Ginseng
According to shown in Fig. 1, when the access request of user is forwarded into source station, forwarding every time accesses CDN node
Request is required for inquiring about DNS, can not meet the acceleration demand that dynamic content accesses.
The content of the invention
It is the general introduction of the theme to being described in detail herein below.It is to limit claim that this general introduction, which is not,
Protection domain.
The embodiment of the present application provides a kind of CDN dynamic routing method and device, disclosure satisfy that in dynamic
Hold the acceleration demand accessed.
The embodiment of the present application provides a kind of CDN dynamic routing method, including：CDN node is receiving
After access request, judge whether itself is first CDN node for receiving the access request；Institute
It is that the CDN node is looked into when receiving first CDN node of the access request to state CDN node
The routing iinformation of the access request is ask, please added to the access by the routing iinformation inquired
Ask, and the access request is sent according to the routing iinformation；It is not to receive institute in the CDN node
When stating first CDN node of access request, the CDN node obtains from the access request
Routing iinformation, and the access request is sent according to the routing iinformation.
Alternatively, methods described also includes：When the CDN node determines institute according to the routing iinformation
When stating the next-hop routing address of access request and corresponding to the source station of the access request, the CDN node
The access request for not carrying routing iinformation is sent to the source station.
Alternatively, methods described also includes：The access can not be asked when the CDN node detects
Ask when being forwarded to node corresponding to next-hop routing address, the CDN node will not carry routing iinformation
Access request be sent to the source station of the access request.
Alternatively, the CDN node judges whether itself is to receive the access to ask in the following manner
First CDN node asked：
The CDN node judges whether the access request carries predetermined information, in the access request
When not carrying predetermined information, it is receive the access request first to judge the CDN node
CDN node, when the access request carries predetermined information, judge that the CDN node does not connect
Receive first CDN node of the access request；Or
The CDN node judges the node whether transmitting terminal of the access request belongs in CDN, if
The transmitting terminal of the access request is not belonging to the node in CDN, then the CDN node is reception institute
First CDN node of access request is stated, if the transmitting terminal of the access request belongs in CDN
Node, then the CDN node is not first CDN node for receiving the access request.
Alternatively, the CDN node inquires about the routing iinformation of the access request, including：
The routing iinformation of access request described in caching query of the CDN node from this node, and/or,
The routing iinformation of the access request is inquired about from routing center.
Alternatively, after the CDN node inquires the routing iinformation of the access request, or,
After the CDN node obtains routing iinformation from the access request, methods described also includes：
Parse and verify the routing iinformation, obtain next-hop routing address；
It is described that the access request is sent according to the routing iinformation, including：It is route according to the next-hop
Address, send the access request.
The embodiment of the present application also provides the dynamic routing device of CDN a kind of, is arranged at CDN node, bag
Include：
Route acquisition module, for the CDN node where after access request is received, judging whether be
Receive first CDN node of the access request；CDN node where judging is to receive
During first CDN node of the access request, the routing iinformation of the access request is inquired about；Sentencing
The CDN node broken where is not when receiving first CDN node of the access request, from institute
State and routing iinformation is obtained in access request；
Add module is route, for the route letter in the route acquisition module polls to the access request
After breath, the routing iinformation inquired is added to the access request；
Routing module, for the routing iinformation inquired to be added into institute in the route add module
After stating access request, the access request is sent according to the routing iinformation；In the route acquisition mould
After block obtains routing iinformation from the access request, sending the access according to the routing iinformation please
Ask.
Alternatively, the routing module, it is additionally operable to that the access request ought be determined according to the routing iinformation
Next-hop routing address when corresponding to the source station of the access request, please by the access for not carrying routing iinformation
Ask and be sent to the source station.
Alternatively, the routing module, it is additionally operable to detect and the access request can not be forwarded to down
Corresponding to one jump routing address during node, the access request for not carrying routing iinformation is sent to the access
The source station of request.
Alternatively, the route acquisition module judge in the following manner where CDN node whether be
Receive first CDN node of the access request：
Judge whether the access request carries predetermined information, predetermined letter is not carried in the access request
During breath, it is to receive first CDN node of the access request to judge the CDN node,
When the access request carries predetermined information, it is not to receive the access to ask to judge the CDN node
First CDN node asked；Or
The node whether transmitting terminal of the access request belongs in CDN is judged, if the access request
Transmitting terminal be not belonging to node in CDN, then the CDN node is receives the access request
First CDN node, if the node that the transmitting terminal of the access request belongs in CDN, described
CDN node is not first CDN node for receiving the access request.
Alternatively, the route acquisition module inquires about the route letter of the access request in the following manner
Breath：The routing iinformation of access request described in caching query from the CDN node at place, and/or, from road
The routing iinformation of the access request is inquired about by center.
Alternatively, described device also includes：Routing resolution and correction verification module, in the route acquisition
Module polls obtain routing iinformation to the routing iinformation of the access request or from the access request
Afterwards, parse and verify the routing iinformation, obtain next-hop routing address；
The routing module sends the access request according to the routing iinformation in the following manner：According to
The next-hop routing address, sends the access request.
In addition, the embodiment of the present application also provides a kind of computer-readable recording medium, being stored with computer can
Execute instruction, the computer executable instructions realize above-mentioned CDN dynamic routing method when being performed.
The embodiment of the present application in first CDN node for receiving access request by inquiring about dynamic road
It is added to by information, and by dynamic routing iinformation in access request, follow-up CDN node is from access
Routing iinformation is obtained in request, so as to meet that dynamic content accesses the route need accelerated, is realized in dynamic
Hold to access and accelerate.
After reading and understanding accompanying drawing and being described in detail, it can be appreciated that other aspects.
Brief description of the drawings
Fig. 1 is the CDN structural representations in correlation technique；
Fig. 2 is the flow chart of the dynamic routing method for the CDN that the embodiment of the present application one provides；
Fig. 3 is the schematic diagram of the dynamic routing device for the CDN that the embodiment of the present application one provides；
Fig. 4 is the schematic diagram of the dynamic routing method for the CDN that the embodiment of the present application two provides；
Fig. 5 is the schematic diagram of the dynamic routing device for the CDN that the embodiment of the present application two provides.
Embodiment
The embodiment of the present application is described in detail below in conjunction with accompanying drawing, it will be appreciated that described below
Embodiment is merely to illustrate and explained the application, is not used to limit the application.
If it should be noted that not conflicting, each feature in the embodiment of the present application and embodiment can
To be combined with each other, within the protection domain of the application.Patrolled in addition, though showing in flow charts
Volume order, but in some cases, can be shown or described to be performed different from order herein
Step.
Fig. 2 is the flow chart of the dynamic routing method for the CDN that the embodiment of the present application provides.Such as Fig. 2 institutes
Show, the dynamic routing method for the CDN that the present embodiment provides comprises the following steps：
Step 201：CDN node judges whether itself is to receive the access after access request is received
First CDN node of request.
In the present embodiment, the access request is HTTP (HTTP, Hyper Text
Transfer Protocol) request.
Alternatively, the CDN node judges whether itself is to receive the access to ask in the following manner
First CDN node asked：
The CDN node judges whether the access request carries predetermined information, in the access request
When not carrying predetermined information, it is receive the access request first to judge the CDN node
CDN node, when the access request carries predetermined information, judge that the CDN node does not connect
Receive first CDN node of the access request.
Wherein, the predetermined information for example including：The routing iinformation of the access request or other are specific
Information.In the present embodiment, receiving first CDN node of access request can add in access request
Add routing iinformation, therefore, whether CDN node can carry route letter according to the access request received
Cease judge itself whether be receive the access request first CDN node.In the access received
When request is without routing iinformation is carried, then the CDN node for receiving the access request is the reception access
First CDN node of request；When the access request received carries routing iinformation, then receive
The CDN node of the access request is not to receive first CDN node of the access request.In addition,
It is (such as specific to carry corresponding customizing messages after being forwarded by first CDN node for access request
Mark etc.), therefore, it is specific whether CDN node can also carry this according to the access request received
Information come judge itself whether be receive the access request first CDN node.
Alternatively, the CDN node can also judge whether itself is described in reception in the following manner
First CDN node of access request：The CDN node judges the transmitting terminal of the access request
The node whether belonged in CDN, if the transmitting terminal of the access request is not belonging to the node in CDN,
Then the CDN node is receives first CDN node of the access request, if the access please
The node that the transmitting terminal asked belongs in CDN, then the CDN node is not to receive the access request
First CDN node.
Wherein, CDN node can according to the procotol of the transmitting terminal of the access request received (IP,
Internet Protocol) address come judge itself whether be receive the access request first CDN section
Point.Because the IP address of all nodes in CDN is known, therefore, CDN node can be with
Check whether the IP address of the transmitting terminal of the access request received belongs to the IP of CDN interior nodes
Address, so as to identify itself whether be receive the access request first CDN node.Please accessing
When the IP address for the transmitting terminal asked is not belonging to the IP address of CDN interior nodes, then it is currently received
The CDN node of the access request is to receive first CDN node of the access request；Please accessing
When the IP address for the transmitting terminal asked belongs to the IP address of CDN interior nodes, then this is currently received
The CDN node of access request is not first CDN node for receiving the access request.Need to illustrate
, the transmitting terminal of access request herein is for the CDN node for receiving the access request
Opposite end, be not limited to send the user terminal of the access request.
Step 202：When the CDN node is to receive first CDN node of the access request,
The CDN node inquires about the routing iinformation of the access request, and the routing iinformation inquired is added
The access request is added to, and the access request is sent according to the routing iinformation.
Alternatively, the CDN node inquires about the routing iinformation of the access request, including：
The routing iinformation of access request described in caching query of the CDN node from this node, and/or,
The routing iinformation of the access request is inquired about from routing center.
Wherein, the routing center can be according to the real-time routing iinformation and CDN between CDN node
Real-time routing iinformation between the source station of node domain name corresponding with access request, generates the access request pair
The optimal time source-routed information answered.The optimal time source-routed information is dynamic.In this way, CDN node
Dynamic routing information corresponding to corresponding access request can be inquired about from routing center, to support to user's dynamic
The access of content accelerates.
Alternatively, in step 202, the route of the access request in the caching of CDN node be present
During information, CDN node can obtain the routing iinformation from this nodal cache, in this nodal cache
In be not present the access request routing iinformation when, CDN node inquires about to obtain the road from routing center
By information, and the routing iinformation that inquiry is obtained is cached.Wherein, CDN node can be according to phase
CDN caching mechanisms in the technology of pass carry out local slow to the routing iinformation for inquiring about to obtain from routing center
Deposit, and CDN node can be at predetermined time intervals from the routing iinformation of routing center renewal local cache.
CDN node is referred in correlation technique to the caching mechanism of routing iinformation on CDN node to quiet
State accesses the caching technology of content, therefore is repeated no more in this.
In step 202, after CDN node obtains the routing iinformation inquired, can be obtained described
The routing iinformation taken all added to the access request, or, by partial routing infor-mation (such as this
Routing iinformation after CDN node) add the access request.The present embodiment is not limited this,
As long as follow-up CDN node can ask the access according to the routing iinformation added to the access request
Ask and be forwarded to source station.In the present embodiment, the routing iinformation can for example add the access please
In the head (header) asked.However, the present embodiment is not limited this.
Step 203：It is not first CDN node for receiving the access request in the CDN node
When, the CDN node obtains routing iinformation from the access request, and according to the routing iinformation
Send the access request.
In the present embodiment, because first CDN node for receiving the access request has accessed this
The routing iinformation of request is added to the access request, therefore, the access that follow-up CDN node receives
Request can carry corresponding routing iinformation, and follow-up CDN node can obtain road from the access request
By information, the access request is sent further according to the routing iinformation.
Alternatively, in step 203, receive the access request first in CDN node it is not
During CDN node, after the CDN node obtains routing iinformation from the access request received, it is determined that
The next-hop routing address and follow-up routing iinformation of the access request.Afterwards, the CDN node can be with
Directly the access request for carrying routing iinformation is sent to next-hop routing address.Or the CDN
Node can delete the routing iinformation wherein carried when receiving the access request, will pass through this node and parse
Forwarded again added to the access request again after obtained routing iinformation is processed, such as the CDN
When node receives the access request, the routing iinformation that the access request carries is the complete of the access request
Routing iinformation, the access request is sent in the next-hop routing address that the CDN node obtains according to parsing
When, routing iinformation that the access request carries can be that the partial routing infor-mation of the access request (such as wraps
Include the routing iinformation of the routing address after this CDN node).However, the present embodiment to this and it is unlimited
It is fixed.
Alternatively, after CDN node inquires the routing iinformation of access request in step 202, or
Person, in step 203, after CDN node obtains routing iinformation from access request, methods described
Also include：
Parse and verify the routing iinformation, obtain next-hop routing address；
It is described that the access request is sent according to the routing iinformation in step 202 and step 203,
Including：According to the next-hop routing address, the access request is sent.
Wherein, CDN node parses obtained routing iinformation, determines next-hop routing address and follow-up
Routing iinformation, and being verified to the obtained routing iinformation of parsing, wherein, verification content includes but unlimited
In domain name and the uniformity of routing iinformation, current domain name can be determined after routing iinformation is by inspection
Routing iinformation is not tampered with.
Alternatively, the method that the present embodiment provides also includes：When CDN node is according to the routing iinformation
It is described when determining that the next-hop routing address of the access request corresponds to the source station of the access request
The access request for not carrying routing iinformation is sent to the source station by CDN node.
Wherein, when the CDN node to receive first CDN node of the access request, and the CDN
Node determines that the next-hop routing address of the access request please to that should access according to the routing iinformation of acquisition
During the source station asked, the CDN node does not perform the step of routing iinformation is added into the access request, should
The access request is directly sent to source station by CDN node；When the CDN node is not to receive access request
First CDN node, and the CDN node determines the access request according to the routing iinformation of acquisition
Next-hop routing address to should access request source station when, access that the CDN node will receive
Routing iinformation in request is deleted, and the access request only is sent into source station.In other words, source station receives
Access request do not carry routing iinformation.
Alternatively, the method that the present embodiment provides also includes：Described in detecting and can not incite somebody to action when CDN node
When access request is forwarded to node corresponding to next-hop routing address, the CDN node will not carry road
The source station of the access request is sent to by the access request of information.
Wherein, when CDN node detects that mistake occurs in the transfer of access request, such as there is CDN
Situations such as link interruption between node and next-hop node, cause the CDN node can not be according to route
When information is forwarded the access request, the access request directly can be sent to by the CDN node
The source station of the access request, wherein, routing iinformation need not be carried by being sent to the access request of source station.
In the present embodiment, by receiving first CDN node (such as CDN edge of access request
Node) on queried access request dynamic routing information, and dynamic routing information is added to access request
In forwarded, follow-up CDN node obtains corresponding routing iinformation from access request, so as to real
The route need that now dynamic accelerates.
Fig. 3 is the schematic diagram of the CDN of the embodiment of the present application one dynamic routing device.As shown in figure 3,
The dynamic routing device for the CDN that the present embodiment provides includes：Route acquisition module, route add module
And routing module.
Route acquisition module, for the CDN node where after access request is received, judging whether be
Receive first CDN node of the access request；CDN node where judging is to receive
During first CDN node of the access request, the routing iinformation of the access request is inquired about；Sentencing
The CDN node broken where is not when receiving first CDN node of the access request, from institute
State and routing iinformation is obtained in access request；
Add module is route, for the route letter in the route acquisition module polls to the access request
After breath, the routing iinformation inquired is added to the access request；
Routing module, for the routing iinformation inquired to be added into institute in the route add module
After stating access request, the access request is sent according to the routing iinformation；In the route acquisition mould
After block obtains routing iinformation from the access request, sending the access according to the routing iinformation please
Ask.
Alternatively, the routing module, it is additionally operable to that the access request ought be determined according to the routing iinformation
Next-hop routing address when corresponding to the source station of the access request, please by the access for not carrying routing iinformation
Ask and be sent to the source station.
Alternatively, the routing module, it is additionally operable to detect and the access request can not be forwarded to down
Corresponding to one jump routing address during node, the access request for not carrying routing iinformation is sent to the access
The source station of request.
Alternatively, the route acquisition module judge in the following manner where CDN node whether be
Receive first CDN node of the access request：
Judge whether the access request carries predetermined information, predetermined letter is not carried in the access request
During breath, it is to receive first CDN node of the access request to judge the CDN node,
When the access request carries predetermined information, it is not to receive the access to ask to judge the CDN node
First CDN node asked；Or
The node whether transmitting terminal of the access request belongs in CDN is judged, if the access request
Transmitting terminal be not belonging to node in CDN, then the CDN node is receives the access request
First CDN node, if the node that the transmitting terminal of the access request belongs in CDN, described
CDN node is not first CDN node for receiving the access request.
Alternatively, the route acquisition module inquires about the route letter of the access request in the following manner
Breath：The routing iinformation of access request described in caching query from the CDN node at place, and/or, from road
The routing iinformation of the access request is inquired about by center.
Alternatively, the routing module is specifically used for parsing and verifies the routing iinformation, obtains next-hop
Routing address, according to the next-hop routing address, send the access request.
Alternatively, described device also includes：Routing resolution and correction verification module, it is described for parsing and verifying
Routing iinformation, obtain next-hop routing address；
The routing module sends the access request according to the routing iinformation in the following manner：According to
The next-hop routing address, sends the access request.
Method of the specific handling process described in embodiment one on said apparatus, thus it is no longer superfluous in this
State.
In practical application, route acquisition module, route add module, routing resolution and correction verification module example
Such as there is the element of information processing capability for processor, routing module is, for example, that transmitter etc. has information
The communication device of emissivities.However, the present embodiment is not limited this.Above-mentioned route acquisition module,
Route add module, routing module and the function of routing resolution and correction verification module can be held by processor
Row is stored in the program/instruction in memory to realize.That is, above-mentioned route acquisition module, route addition
Module, routing module and routing resolution and correction verification module can be the combinations of software, hardware or both.
Fig. 4 is the schematic diagram of the dynamic routing method for the CDN that the embodiment of the present application two provides.Yu Benshi
Apply in example, access request is HTTP request, and with three CDN nodes, (CDN node 1, CDN are saved
Point 2 and CDN node 3) forwarding access request to source station exemplified by illustrate.
As shown in figure 4, when CDN node 1 receives HTTP request, judge it itself is the HTTP
Ask the first hop node in CDN, i.e. whether be first CDN for receiving the HTTP request
Node.In this, CDN node 1 is carried out according to whether the HTTP request received carries routing iinformation
Judging, the HTTP request that CDN node 1 is judged to receive does not carry routing iinformation, therefore, from
Body is the first hop node of the HTTP request, then CDN node 1 is from local cache or routing center
The routing iinformation of domain name corresponding to the access request is obtained, and the routing iinformation is attached to the HTTP and asked
In asking, the HTTP request is forwarded to next node further according to the routing iinformation of acquisition, in Fig. 4
CDN node 2.After CDN node 2 receives the access request comprising routing iinformation, judge to come from
Body is not the first hop node of the HTTP request, no longer from routing center acquisition routing iinformation, but from
Routing iinformation is obtained in the HTTP request, continues to forward according to the routing iinformation of acquisition, by this
HTTP request is transmitted to CDN node 3.The HTTP for including route letter is received in CDN node 3
After request, routing iinformation is obtained from the HTTP request, and according to the routing iinformation of acquisition by the HTTP
Request is forwarded to source station.Wherein, CDN node 3 first believes the route in the HTTP request received
Breath is deleted, then the HTTP request is sent into source station, i.e. the HTTP request for being transmitted to source station is not taken
Band routing iinformation.
Wherein, each CDN node after routing iinformation is obtained, it is necessary to parse routing iinformation, it is determined that under
One jumps routing address and follow-up routing iinformation, and the routing iinformation to obtaining verifies, wherein, school
Test content and include but is not limited to domain name and the uniformity of routing iinformation, current domain name can be determined by verification
Routing iinformation whether be tampered.
Wherein, if CDN node 1 is found between CDN node 2 when forwarding HTTP request
Link error, then CDN node 1, can be by the HTTP without adding routing iinformation in the HTTP request
Request is transmitted directly to source station；Similarly, if CDN node 2 is found when forwarding HTTP request
Error is linked between CDN node 3, then CDN node 2 can delete the HTTP request and include
Routing iinformation, and the HTTP request after deletion routing iinformation is sent to source station.That is, it is sent to source station
HTTP request do not include routing iinformation.
Fig. 5 is the schematic diagram of the dynamic routing device for the CDN that the embodiment of the present application two provides.Such as Fig. 5
Shown, the dynamic routing device for the CDN that the present embodiment provides includes：Route acquisition module, route add
Add module, routing resolution and inspection module and routing module.
The CDN node 1 shown in Fig. 4 is arranged in the dynamic routing device for the CDN that the present embodiment provides
When, route acquisition module judges whether CDN node 1 is to receive the HTTP after HTTP request is received
First CDN node of request, in this, route acquisition module is according to the HTTP request received
No carrying routing iinformation is judged that the HTTP request that route acquisition module is judged to receive does not carry
Routing iinformation, therefore, CDN node 1 are first hop node of the HTTP request in CDN, this
When, route acquisition module obtains the routing iinformation of the HTTP request from local cache or routing center.Road
The routing iinformation obtained by parsing and correction verification module parsing, determines next-hop routing address and follow-up route
Information, and routing iinformation is verified.After the routing iinformation is by verification, the route addition
The routing iinformation of acquisition is added in the HTTP request by module.Routing module is according to the next-hop of determination
Routing address, HTTP request of the forwarding comprising routing iinformation to CDN node 2.
The CDN node 2 shown in Fig. 4 is arranged in the dynamic routing device for the CDN that the present embodiment provides
When, route acquisition module judges whether CDN node 2 is to receive the HTTP after HTTP request is received
First CDN node of request, in this, route acquisition module is according to the HTTP request received
No carrying routing iinformation is judged that the HTTP request that route acquisition module is judged to receive carries road
By information, therefore, CDN node 2 is not first hop node of the HTTP request in CDN, this
When, route acquisition module obtains the routing iinformation of the HTTP request from the HTTP request.Route solution
The routing iinformation that analysis and correction verification module parsing obtain, determine next-hop routing address and follow-up route letter
Breath, and routing iinformation is verified.After the routing iinformation is by verification, routing module is according to really
Fixed next-hop routing address, HTTP request of the forwarding comprising routing iinformation to CDN node 3.
The CDN node 3 shown in Fig. 4 is arranged in the dynamic routing device for the CDN that the present embodiment provides
When, route acquisition module judges whether CDN node 3 is to receive the HTTP after HTTP request is received
First CDN node of request, in this, route acquisition module is according to the HTTP request received
No carrying routing iinformation is judged that the HTTP request that route acquisition module is judged to receive carries road
By information, therefore, CDN node 3 is not first hop node of the HTTP request in CDN, this
When, route acquisition module obtains the routing iinformation of the HTTP request from the HTTP request.Route solution
The routing iinformation that analysis and correction verification module parsing obtain, determine next-hop routing address and follow-up route letter
Breath, and routing iinformation is verified.After the routing iinformation is by verification, routing module is according to really
Fixed next-hop routing address, forwarding delete the HTTP request of routing iinformation to source station.
In addition, the embodiment of the present application also provides a kind of computer-readable recording medium, being stored with computer can
Execute instruction, the computer executable instructions realize above-mentioned CDN dynamic road when being executed by processor
By method.
In a typical configuration, computing device includes one or more processors (CPU), input
/ output interface, network interface and internal memory.Internal memory may include computer-readable recording medium in it is non-forever
The forms such as long property memory, random access memory (RAM) and/or Nonvolatile memory, it is such as read-only
Memory (ROM) or flash memory (flash RAM).Internal memory is the example of computer-readable recording medium.
Computer-readable recording medium includes permanent and non-permanent, removable and non-removable media, can be with
Realize that information stores by any method or technique.Information can be computer-readable instruction, data structure,
The module of program or other data.The example of computer-readable recording medium includes but is not limited to：In phase transformation
Deposit (PRAM), static RAM (SRAM), dynamic random access memory (DRAM),
Other kinds of random access memory (RAM), read-only storage (ROM), electric erasable can
Program read-only memory (EEPROM), fast flash memory bank or other memory techniques, read-only optical disc are read-only
Memory (CD-ROM), digital versatile disc (DVD) or other optical storages, magnetic box type magnetic
Band, magnetic tape type disk storage or other magnetic storage apparatus or any other non-transmission medium, available for depositing
Store up the information that can be accessed by a computing device.
One of ordinary skill in the art will appreciate that all or part of step in the above method can pass through journey
Sequence instructs the related hardware (such as processor) to complete, and described program can be stored in computer-readable deposit
In storage media, such as read-only storage, disk or CD.Alternatively, the whole of above-described embodiment or portion
It can also be realized step by step using one or more integrated circuits.Correspondingly, it is each in above-described embodiment
Module/unit can be realized in the form of hardware, such as realize its corresponding function by integrated circuit,
It can also be realized in the form of software function module, such as be stored in by computing device in memory
Program/instruction realize its corresponding function.The application is not restricted to the hardware of any particular form and soft
The combination of part.
The advantages of general principle and principal character and the application of the application has been shown and described above.This Shen
It please be not restricted to the described embodiments, simply explanation the application described in above-described embodiment and specification
Principle, on the premise of the application spirit and scope are not departed from, the application also has various changes and modifications,
These changes and improvements are both fallen within the range of claimed the application.
Claims (12)
- A kind of 1. content distributing network CDN dynamic routing method, it is characterised in that including：CDN node judges whether itself is receive the access request the after access request is received One CDN node；When the CDN node is to receive first CDN node of the access request, the CDN The routing iinformation of access request described in querying node, the routing iinformation inquired is added to the visit Request is asked, and the access request is sent according to the routing iinformation；It is described when the CDN node is not to receive first CDN node of the access request CDN node obtains routing iinformation from the access request, and according to being sent the routing iinformation Access request.
- 2. according to the method for claim 1, it is characterised in that methods described also includes：When the CDN node determines that the next-hop of the access request route ground according to the routing iinformation When location corresponds to the source station of the access request, the CDN node please by the access for not carrying routing iinformation Ask and be sent to the source station.
- 3. according to the method for claim 1, it is characterised in that methods described also includes：The access request can not be forwarded to next-hop routing address pair when the CDN node detects During the node answered, the access request for not carrying routing iinformation is sent to the access by the CDN node The source station of request.
- 4. according to the method for claim 1, it is characterised in that the CDN node passes through following Mode judges whether itself is first CDN node for receiving the access request：The CDN node judges whether the access request carries predetermined information, in the access request When not carrying predetermined information, it is receive the access request first to judge the CDN node CDN node, when the access request carries predetermined information, judge that the CDN node does not connect Receive first CDN node of the access request；OrThe CDN node judges the node whether transmitting terminal of the access request belongs in CDN, if The transmitting terminal of the access request is not belonging to the node in CDN, then the CDN node is reception institute First CDN node of access request is stated, if the transmitting terminal of the access request belongs in CDN Node, then the CDN node is not first CDN node for receiving the access request.
- 5. according to the method for claim 1, it is characterised in that described in the CDN node inquiry The routing iinformation of access request, including：The routing iinformation of access request described in caching query of the CDN node from this node, and/or, The routing iinformation of the access request is inquired about from routing center.
- 6. according to the method for claim 1, it is characterised in that the CDN node inquires institute After the routing iinformation for stating access request, or, the CDN node obtains from the access request After routing iinformation, methods described also includes：Parse and verify the routing iinformation, obtain next-hop routing address；It is described that the access request is sent according to the routing iinformation, including：It is route according to the next-hop Address, send the access request.
- 7. a kind of content distributing network CDN dynamic routing device, is arranged at CDN node, it is special Sign is, including：Route acquisition module, for the CDN node where after access request is received, judging whether be Receive first CDN node of the access request；CDN node where judging is to receive During first CDN node of the access request, the routing iinformation of the access request is inquired about；Sentencing The CDN node broken where is not when receiving first CDN node of the access request, from institute State and routing iinformation is obtained in access request；Add module is route, for the route letter in the route acquisition module polls to the access request After breath, the routing iinformation inquired is added to the access request；Routing module, for the routing iinformation inquired to be added into institute in the route add module After stating access request, the access request is sent according to the routing iinformation；In the route acquisition mould After block obtains routing iinformation from the access request, sending the access according to the routing iinformation please Ask.
- 8. device according to claim 7, it is characterised in that the routing module, be additionally operable to Asked when the next-hop routing address that the access request is determined according to the routing iinformation corresponds to the access During the source station asked, the access request for not carrying routing iinformation is sent to the source station.
- 9. device according to claim 7, it is characterised in that the routing module, be additionally operable to When detect the access request can not be forwarded to node corresponding to next-hop routing address when, will not take Access request with routing iinformation is sent to the source station of the access request.
- 10. device according to claim 7, it is characterised in that the route acquisition module passes through Whether the CDN node where in the following manner judges is the first CDN sections for receiving the access request Point：Judge whether the access request carries predetermined information, predetermined letter is not carried in the access request During breath, it is to receive first CDN node of the access request to judge the CDN node, When the access request carries predetermined information, it is not to receive the access to ask to judge the CDN node First CDN node asked；OrThe node whether transmitting terminal of the access request belongs in CDN is judged, if the access request Transmitting terminal be not belonging to node in CDN, then the CDN node is receives the access request First CDN node, if the node that the transmitting terminal of the access request belongs in CDN, described CDN node is not first CDN node for receiving the access request.
- 11. device according to claim 7, it is characterised in that the route acquisition module passes through In the following manner inquires about the routing iinformation of the access request：From the caching query institute of the CDN node at place The routing iinformation of access request is stated, and/or, from the routing iinformation of the routing center inquiry access request.
- 12. device according to claim 7, it is characterised in that described device also includes：Route Parsing and correction verification module, for the routing iinformation in the route acquisition module polls to the access request Or parse after acquisition routing iinformation from the access request and verify the routing iinformation, obtain Next-hop routing address；The routing module sends the access request according to the routing iinformation in the following manner：According to The next-hop routing address, sends the access request.
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