CN102611756B - Method and system for sending access request - Google Patents

Method and system for sending access request Download PDF

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Publication number
CN102611756B
CN102611756B CN201210085192.1A CN201210085192A CN102611756B CN 102611756 B CN102611756 B CN 102611756B CN 201210085192 A CN201210085192 A CN 201210085192A CN 102611756 B CN102611756 B CN 102611756B
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access request
address
task list
dns
domain
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CN102611756A (en
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周兴博
宗劼
李健松
黄东
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Beijing Blue It Technologies Co ltd
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Beijing Blue It Technologies Co ltd
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Abstract

The invention relates to the field of content distribution network technique, in particular to a method and a system for sending an access request, which are used for improving the efficiency of accessing domain name information to be accelerated. The method comprises the following steps of: generating an operation task list according to the domain name information obtained after the access request of a user is analyzed by a DNS (Domain Name System); sending an acquisition permission command to the DNS; by the acquisition permission command, permitting the DNS to acquire the operation task list at operation task list generation equipment; according to the operation task list and the domain name information acquired by the DNS, determining a virtual server corresponding to the access request; sending request information carrying the access request and an IP address obtained by analyzing the access request to the determined virtual server; judging whether the acceleration operation needs to be carried out on the access request by the determined virtual server; and if determining that the acceleration is needed, forwarding the access request to a server corresponding to the IP address. Therefore, according to the method, the domain name information to be accelerated can be efficiently and accurately acquired.

Description

A kind of method and system sending access request
Technical field
The present invention relates to content distributing network technical field, particularly relate to a kind of method and system sending access request.
Background technology
Content distributing network (Content Delivery Network, CDN) conventional accelerated method is comprised: traditional accelerated method and oppositely accelerated method.Wherein traditional accelerated method process is as follows:
As shown in Figure 1, the domain-name information to be accelerated that content supplier provides by CDN acceleration service provider is stored in domain-name information system (Domain Name System); After the domain-name information of the website that user will be accessed by browser sends to DNS, when DNS determines that this domain-name information is the domain-name information wait accelerating, this domain-name information is resolved, determine the IP address of the CDN node of this domain-name information the most applicable, and this IP address is sent to user, the content of website needed for the CDN node request that user indicates to this IP address;
In reverse accelerated method, content supplier does not accelerate service provider to CDN and provides domain-name information to be accelerated, and therefore, needs to pre-determine out domain-name information to be accelerated, and by the domain-name information determined stored in DNS; Can realize accelerating to this domain-name information according to traditional accelerated method after DNS receives the domain-name information of user's transmission; At present, reverse accelerated method determines domain-name information to be accelerated by the following method:
The first, senior CDN accelerates service provider according to the industry experience of self, judges the domain-name information of a large amount of acceleration carried out operations and relevant information thereof;
The second, network provider, by the visit information of netizen in long-time statistical net, excavates the domain-name information and relevant information thereof that can carry out accelerating;
The third, by manually accessing website corresponding to domain-name information, check access result, determines whether this domain-name information possesses the condition of acceleration according to access result;
4th kind, in DNS, first add domain-name information to be accelerated, when the website that user is corresponding to this domain-name information conducts interviews, unsuccessfully may complain if accessed, therefore, by collecting the complaint quantity of user, determine whether to carry out acceleration operation to this domain-name information.
When using first and second kind of method, although the domain-name information validity provided by CDN acceleration service provider or network provider is very high, but this resource is not free and easily obtains, and the validity of acquired domain-name information also cannot keep always, there is situation about losing efficacy, just need to regain after domain-name information lost efficacy, therefore, the cost obtaining domain-name information is very high.Next, the quantity of the domain-name information that CDN acceleration service provider or network provider provide also is limited;
When using third and fourth kind of method, very high cost of labor, inefficiency can be produced, and likely produce a large amount of mistakes.
Visible, the method for the determination fast domain-name information to be added used when will realize in prior art oppositely accelerating, will waste a large amount of man power and materials, the possibility of makeing mistakes also can improve greatly
Summary of the invention
The embodiment of the present invention provides a kind of method and system sending access request, for solving in prior art when oppositely accelerating content distributing network, cannot obtaining of efficiently and accurately wait to accelerate domain-name information problem.
Send a method for access request, described method comprises:
Operation task list generates equipment according to the domain-name information obtained after the access request by domain name system DNS parsing user got, generating run task list; Send to described DNS and allow to obtain order; Described permission obtains order and allows DNS to generate the list of equipment acquisition operation task from described operation task list; Described operation task list comprises corresponding VIP address unique with each domain-name information; A network address translation apparatus virtual server is uniquely pointed in described VIP address;
Described DNS, according to the operation task list got and domain name information, determines and the virtual server corresponding to described access request; The solicited message of carrying described access request and resolving the IP address that described access request obtains is sent to the virtual server determined;
The described virtual server determined judges whether to need to carry out acceleration operation to described access request; When determining to need to accelerate, described access request is transmitted to the server corresponding with described IP address.
Send a system for access request, described system comprises:
Operation task list generates equipment, for the domain-name information obtained after the access request by domain name system DNS parsing user that basis gets, and generating run task list; Send to described DNS and allow to obtain order; Described permission obtains order and allows DNS to generate the list of equipment acquisition operation task from described operation task list; Described operation task list comprises corresponding VIP address unique with each domain-name information; A network address translation apparatus virtual server is uniquely pointed in described VIP address;
Described DNS, for according to the operation task list got and domain name information, determines and the virtual server corresponding to described access request; The solicited message of carrying described access request and resolving the IP address that described access request obtains is sent to the virtual server determined;
Described virtual server, needs to carry out acceleration operation to described access request for judging whether; When determining to need to accelerate, described access request is transmitted to the server corresponding with described IP address.
The domain-name information generating run task list that method provided by the invention parses the access request that user sends according to DNS; This operation task list comprises corresponding VIP address unique with each domain-name information; A virtual server is uniquely pointed in this VIP address, sends allow to obtain order to DNS; Described permission obtains order and allows DNS to generate the list of equipment acquisition operation task from described operation task list; DNS is after receiving permission acquisition order, obtain operation task list, and according to the operation task list got, determine and the VIP address of resolving corresponding to domain-name information that access request obtains, by carrying the access request of user, the solicited message of IP address sends to virtual server indicated by VIP address; After virtual server receives this solicited message, when determining to need to carry out acceleration operation to this access request, this access request is sent to the server indicated by IP address; Visible, the method is before oppositely accelerating, can judge which domain name needs to carry out acceleration to operate by virtual server, which does not need to carry out acceleration operation, realize accelerating operation to needing the access request of carrying out acceleration operation, therefore, use the method oppositely accelerate to need in operation the domain-name information carrying out acceleration operation be not accelerate the experience of service provider by CDN, content supplier provides and artificially judges and obtain, therefore, the efficiency obtaining and wait to accelerate domain-name information and speed can greatly be improved.
Accompanying drawing explanation
Fig. 1 is the networking side structure schematic diagram of content distributing network in prior art;
The method flow schematic diagram of the transmission access request that Fig. 2 provides for the embodiment of the present invention;
The networking side structure schematic diagram that Fig. 3 provides for the embodiment of the present invention;
The schematic flow sheet of the method performed by the operation task list generation equipment that Fig. 4 provides for the embodiment of the present invention;
The schematic flow sheet of the method performed by the DNS that Fig. 5 provides for the embodiment of the present invention;
The flow chart schematic diagram of the method performed by the virtual server that Fig. 6 provides for the embodiment of the present invention;
A kind of structural representation sending the system of access request that Fig. 7 provides for the embodiment of the present invention.
Embodiment
The domain-name information generating run task list that method provided by the invention parses the access request that user sends according to DNS; This operation task list comprises corresponding VIP address unique with each domain-name information; A virtual server is uniquely pointed in this VIP address, sends allow to obtain order to DNS; Described permission obtains order and allows DNS to generate the list of equipment acquisition operation task from described operation task list; DNS is after receiving permission acquisition order, obtain operation task list, and according to the operation task list got, determine and the VIP address of resolving corresponding to domain-name information that access request obtains, by carrying the access request of user, the solicited message of IP address sends to virtual server indicated by VIP address; After virtual server receives this solicited message, when determining to need to carry out acceleration operation to this access request, this access request is sent to the server indicated by IP address; Visible, the method is before oppositely accelerating, can judge which domain name needs to carry out acceleration to operate by virtual server, which does not need to carry out acceleration operation, realize accelerating operation to needing the access request of carrying out acceleration operation, therefore, use the method oppositely accelerate to need in operation the domain-name information carrying out acceleration operation be not accelerate the experience of service provider by CDN, content supplier provides and artificially judges and obtain, therefore, the efficiency obtaining and wait to accelerate domain-name information and speed can greatly be improved.As shown in Figure 2, detailed process is as follows:
Step 21, operation task list generates equipment according to the domain-name information obtained after the access request by domain name system DNS parsing user got, generating run task list; Send to described DNS and allow to obtain order; Described permission obtains order and allows DNS to generate the list of equipment acquisition operation task from described operation task list; Described operation task list comprises corresponding VIP address unique with each domain-name information; A network address translation apparatus virtual server is uniquely pointed in described VIP address;
Step 22, described DNS, according to the operation task list got and domain name information, determines and the virtual server corresponding to described access request; The solicited message of carrying described access request and resolving the IP address that described access request obtains is sent to the virtual server determined;
Step 23, described in the virtual server determined judge whether to need to carry out acceleration operation to described access request; When determining to need to accelerate, described access request is transmitted to the server corresponding with described IP address.
Concrete, the domain-name information obtained after the access request according to the dns resolution user got can generate an information list, and this information list comprises at least one operation task list; Because the number of virtual server in system and VIP is limited, and in subsequent operation, be the virtual server sending to VIP corresponding the access request of the user corresponding with domain-name information in operation task list, therefore, the number of the domain-name information comprised in operation task list is not more than the number of virtual server in system, so that ensure can being assigned to the access request equilibrium in operation task list corresponding to domain-name information on each virtual server, proof load divides balancing;
Concrete, in order to the acquisition operation task list ensureing that DNS at every turn can both be orderly, before sending to DNS and allowing to obtain order, to comprise further after the described operation task list of generation:
The state of described operation task list is set to state to be obtained; Now, described transmission to described DNS allows the permission acquisition order of acquisition operation task list to comprise:
The permission acquisition order that permission acquisition state is operation task list to be obtained is sent to described DNS.
Concrete, in order to the acquisition operation task list ensureing that DNS at every turn can both be orderly, obtain operation task list and comprise:
Acquisition state is operation task list to be obtained.
Preferably, because multiple domain name may correspond to a port, therefore, can black and white lists be pre-set, contain the port information that can carry out acceleration operation in this black and white lists, therefore, can determine whether the access request received can carry out acceleration operation, and detailed process is as follows according to port information:
Judge whether described port information is contained in the white list pre-set; When being contained in described white list, determine that described access request needs to carry out acceleration operation.
Concrete, above-mentioned all methods can be carried out in DNS; But in order to improve DNS oppositely accelerating the processing speed in operation, said method should be run in the equipment independent of DNS, in following examples, this equipment being called that operation task list generates equipment.
Below with specific embodiment introduction:
Embodiment:
The method can be used for, but is not limited in network environment as shown in Figure 3, accelerates operation for realizing reverse CDN; User in network sends the access request of carrying domain-name information to DNS by browser; DNS parse after receiving access request this domain-name information corresponding with this domain-name information, the IP address of CDN node that distance users is nearest or the IP address at former station, the server that this IP address is used in reference to network side (conveniently introduces the present embodiment for the IP address of CDN node, such as user needs the domain-name information of accessing to be www.sina.com, the IP address, former station that then this domain-name information is corresponding is 202.108.33.60), and generate the log information comprising domain-name information and IP, the domain-name information in every bar log information and IP address one_to_one corresponding; Realize a kind of method sending access request that the present embodiment provides, detailed process is as follows:
The flow chart of the method for Fig. 4 performed by operation task list generation equipment in the present embodiment, the flow chart of the method for Fig. 5 performed by DNS, the flow chart of the method for Fig. 6 performed by virtual server:
Step 31, operation task list generates all log informations that equipment obtains the current generation of DNS;
Preferably, because the workload of DNS is comparatively large, and higher to requirement of real-time, in order to ensure the operating efficiency of DNS, equipment can be generated by operation task list and obtaining DNS log information;
Step 32, operation task list generates equipment and extract domain-name information from each log information got, and the IP address of the CDN node corresponding with this domain-name information;
Concrete, the IP address of domain-name information and CDN node to be resolved according to the access request of user by DNS and is drawn;
Step 33, operation task list generates equipment according to the content information generated list got, and this information list comprises at least one operation task list; The detailed process of generating run task list is as follows:
Form a task record for the domain-name information in every bar log information of getting distributes a unique corresponding VIP address, now, a task record comprises: the IP address of domain-name information, CDN node and VIP address; Using one or more task record as an operation task list; When an operation task list comprises many task records, the VIP address in every bar task record is not identical; A network address translation apparatus virtual server is uniquely pointed in VIP address;
In this step, when an operation task list comprises multiple task record, the number of task record is less than or equal to the number of VIP address; Can ensure in subsequent operation can by each virtual server distributed in network of the access request equilibrium of user, to reach the object of load balancing;
Because the quantity of VIP address in network and the quantity of virtual server are limited, VIP address can corresponding one or more virtual server; Virtual server operates the forwarding of the related data packets such as user's request for realizing;
Step 34, operation task list generates equipment and operation task list is sent to database hub; Database hub can embedded or independent of operation task list generate equipment;
Operation task list is sent to database hub by IP, VIP of the domain-name information in every bar task record, CDN node and between corresponding relation be updated to database hub;
Preferably, in this step, corresponding relation is updated to database hub and can facilitates follow-up secondary development or later inquiry work;
Step 35, the state of the operation task list of the pending operation received is set to state to be obtained by database hub; And send permission acquisition order to DNS;
Step 36, after DNS receives permission acquisition order, from described database, acquisition state is the operation task list of state to be obtained, has obtained rear database hub and the state of this operation task list has been set to obtain state;
Step 37, the access request of the user in operation task list corresponding to domain-name information is sent to the virtual server pointed by the VIP corresponding with this domain-name information by DNS; Such as, the operation task list got comprises following task record:
Task record 1: IP1, VIP1 of domain-name information 1, CDN node;
Task record 2: IP2, VIP2 of domain-name information 2, CDN node;
Task record 3: IP3, VIP3 of domain-name information 3, CDN node;
Then the access request corresponding to domain-name information 1 is sent to the virtual server pointed by VIP1 by DNS;
Preferably, the VIP that the every bar task record in an operation task list comprises is not identical, all task records in same operation task list can be ensured to be evenly distributed on all virtual servers in network;
Step 38, after virtual server receives the access request that DNS sends, judges whether the port information entrained by this access request is stored in the white list pre-set, if be kept in white list, performs step 39; Otherwise, process by prior art;
Port information is generally available is divided into following three classes:
The first kind, generally acknowledges port (Well Known Ports): from 0 to 1023, their tight bindings are served in some.Usually the communication of these ports clearly indicates the agreement of certain service.Such as: the in fact always HTTP communication of 80 ports, therefore, when receiving domain-name information, can determine to need the service of being bound by 80 ports to process;
Equations of The Second Kind, registered port (Registered Ports): from 1024 to 49151.Their looselys are bound to some services.That is have many service bindings in these ports, these ports also can be used for other objects many.Such as: many system process dynamic ports are from about 1024;
3rd class, dynamic and/or privately owned port (Dynamic and/or Private Ports): from 49152 to 65535.In theory, not should be service and distribute these ports.
Concrete, the domain-name information that can be undertaken processing by the service of the port binding corresponding with each port information all can carry out acceleration operation;
Step 39, the access request of user is transmitted to the server corresponding to IP address of CDN node by virtual server, realizes accelerating user to the access of webpage;
Concrete, access request is transmitted to the server corresponding with IP address and comprises:
Be server ip address by IP address transition; Described access request is transmitted to the server corresponding to described server ip address.
Step 310, virtual server notice DNS task completes, and makes DNS complete follow-up access request according to existing task.
Preferably, all operations of operation task list generation equipment also can be completed by DNS;
Preferably, in this programme, obtain domain-name information, IP, VIP and port information, and the method for the corresponding relation obtained between it can be applicable in any scheme, and be not only be applied to reverse-dns to accelerate in the scheme of operation.
As shown in Figure 7, the embodiment of the present invention also provides a kind of system sending access request, and described system comprises:
Operation task list generates equipment 71, for according to get resolve the access request of user by domain name system DNS 72 after the domain-name information that obtains, generating run task list; Send to described DNS72 the permission allowing to obtain operation task list and obtain order; Described operation task list comprises corresponding VIP address unique with each domain-name information; A network address translation apparatus virtual server 73 is uniquely pointed in described VIP address;
Described DNS72, for according to the operation task list got and domain name information, determines and the virtual server 73 corresponding to described access request; The solicited message of carrying described access request and resolving the IP address that described access request obtains is sent to the virtual server 73 determined;
Described virtual server 73, needs to carry out acceleration operation to described access request for judging whether; When determining to need to accelerate, described access request is transmitted to the server corresponding with described IP address.
Described operation task list generate equipment 71 also for, the state of described operation task list is set to state to be obtained;
Operation task list generate equipment 71 specifically for, send to described DNS72 and allow acquisition state to be that the permission of operation task list to be obtained obtains order.
Acquisition state is operation task list to be obtained.
Described request information also carries the port information corresponding to described access request;
Described virtual server 73 specifically for, judge whether described port information is contained in the white list pre-set; When being contained in described white list, determine that described access request needs to carry out acceleration operation.
Described virtual server 73 also for, be server ip address by described IP address transition; Described access request is transmitted to the server corresponding to described server ip address.
In sum, beneficial effect:
The domain-name information generating run task list that method provided by the invention parses the access request that user sends according to DNS; This operation task list comprises corresponding VIP address unique with each domain-name information; A virtual server is uniquely pointed in this VIP address, sends the permission allowing to obtain operation task list obtain order to DNS; DNS is after receiving permission acquisition order, obtain operation task list, and according to the operation task list got, determine and the VIP address of resolving corresponding to domain-name information that access request obtains, by carrying the access request of user, the solicited message of IP address sends to virtual server indicated by VIP address; After virtual server receives this solicited message, when determining to need to carry out acceleration operation to this access request, this access request is sent to the server indicated by IP address; Visible, the method is before oppositely accelerating, can judge which domain name needs to carry out acceleration to operate by virtual server, which does not need to carry out acceleration operation, realize accelerating operation to needing the access request of carrying out acceleration operation, therefore, use the method oppositely accelerate to need in operation the domain-name information carrying out acceleration operation be not accelerate the experience of service provider by CDN, content supplier provides and artificially judges and obtain, therefore, the efficiency obtaining and wait to accelerate domain-name information and speed can greatly be improved;
Preferably, the VIP that the every bar task record in an operation task list comprises is not identical, all task records in same operation task list can be ensured to be evenly distributed on all virtual servers in network;
Preferably, all operations of operation task list generation equipment also can be completed by DNS;
Preferably, in this programme, obtain domain-name information, IP, VIP and port information, and the method for the corresponding relation obtained between it can be applicable in any scheme, and be not only be applied to reverse-dns to accelerate in the scheme of operation.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (8)

1. send a method for access request, it is characterized in that, described method comprises:
Operation task list generates equipment according to the domain-name information obtained after the access request by domain name system DNS parsing user got, generating run task list; Described operation task list generates equipment and sends permission acquisition order to described DNS; Described permission obtains order and allows DNS to generate the list of equipment acquisition operation task from described operation task list; Described operation task list comprises task record, described task record comprises: the IP address of domain-name information, CDN node and VIP address, or described task record comprises: the IP address at domain-name information, former station and VIP address, described VIP address is uniquely corresponding with each domain-name information; A network address translation apparatus virtual server is uniquely pointed in described VIP address;
Described DNS is according to the operation task list got and domain name information, determine and the virtual server corresponding to the access request of user, and to the virtual server transmission request information determined, the access request of user is carried in described request information, port information corresponding to described access request, and the IP address of CDN node or the IP address at former station of resolving that the access request of user obtains;
Described virtual server judges whether described port information is contained in the white list pre-set;
When being contained in described white list, determine that described access request needs to carry out acceleration operation;
When determining to need to accelerate, by server corresponding for the access request of user is transmitted to the access request of resolving user obtains IP address.
2. the method for claim 1, is characterized in that, before sending to described DNS and allowing to obtain order, to comprise further after the described operation task list of generation:
The state of described operation task list is set to state to be obtained;
Described transmission to described DNS allows acquisition order to comprise:
The permission acquisition order that permission acquisition state is operation task list to be obtained is sent to described DNS.
3. method as claimed in claim 2, is characterized in that, described DNS obtains operation task list and comprises:
Described DNS obtains the operation task list that state is state to be obtained.
4. the method for claim 1, is characterized in that, describedly described access request is transmitted to the server corresponding with described IP address and comprises:
Be server ip address by described IP address transition; Described access request is transmitted to the server corresponding to described server ip address.
5. send a system for access request, it is characterized in that, described system comprises:
Operation task list generates equipment, for the domain-name information obtained after the access request by domain name system DNS parsing user that basis gets, and generating run task list; Described operation task list generates equipment and sends permission acquisition order to described DNS; Described permission obtains order and allows DNS to generate the list of equipment acquisition operation task from described operation task list; Described operation task list comprises task record, described task record comprises: the IP address of domain-name information, CDN node and VIP address, or described task record comprises: the IP address at domain-name information, former station and VIP address, described VIP address is uniquely corresponding with each domain-name information; A network address translation apparatus virtual server is uniquely pointed in described VIP address;
Described DNS, the operation task list got for basis and domain name information, determine and the virtual server corresponding to the access request of user, and to the virtual server transmission request information determined, the access request of user is carried in described request information, port information corresponding to described access request, and the IP address of CDN node or the IP address at former station of resolving that the access request of user obtains;
Described virtual server, for judging whether described port information is contained in the white list pre-set; When being contained in described white list, determine that described access request needs to carry out acceleration operation; When determining to need to accelerate, by server corresponding for the access request of user is transmitted to the access request of resolving user obtains IP address.
6. system as claimed in claim 5, is characterized in that, described operation task list generate equipment also for, the state of described operation task list is set to state to be obtained;
Operation task list generate equipment specifically for, send to described DNS and allow acquisition state to be that the permission of operation task list to be obtained obtains order.
7. system as claimed in claim 6, is characterized in that, described DNS also for, acquisition state is operation task list to be obtained.
8. system as claimed in claim 5, is characterized in that, described virtual server also for, be server ip address by described IP address transition; Described access request is transmitted to the server corresponding to described server ip address.
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