CN102790798A - Transparent proxy implementation method, device and system in content distribution network - Google Patents
Transparent proxy implementation method, device and system in content distribution network Download PDFInfo
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Abstract
The invention discloses a transparent proxy implementation method in a content distribution network. The transparent proxy implementation method is used for enabling a source server in the content distribution network to obtain network addresses of access users so as to accurately calculate the number of the access users to effectively perform operations of load balancing and the like of a content distribution network (CDN), and good operation of a CDN system can be ensured. The transparent proxy implantation method includes: enabling an edge service node to receive access request transmitted by a client side, wherein the access request at least carries the network addresses of the client side; obtaining the network addresses of the client side and storing the network addresses to a preset position of a treaty head of a hyper text transport protocol (HTTP); and transmitting the access request to a source server based on the HTTP. The invention further discloses a server and an implementation system of the transparent proxy in the content distribution network.
Description
Technical field
The present invention relates to networking technology area, relate in particular to Transparent Proxy implementation method, equipment and system in a kind of content distributing network.
Background technology
Content distributing network (Content Delivery Network; CDN) in; Need be when the source station obtain data content the user, user's visit is guided on the caching server (Cache servers), make the user obtain the corresponding data content that comes from source server of buffer memory from Cache servers; Thereby avoided not causing obtaining the slower problem of data, reached the effect of quickening visit from source server owing to access link is good.The CDN network can be in real time leads on the nearest CDN service node of user according to being connected of network traffics and each CDN service node, load state and to the access request of integrated informations such as user's distance and response time with the user again, and this CDN service node obtains the data content of user's request and is buffered in this locality (this CDN service node is Cache servers) from source server in real time according to user's access request.Make the user obtain required content like this, and need not to arrive source server, thereby solved the situation of Internet network congestion, improve the response speed of user capture website from nearest CDN service node.
But in the CDN network, the CDN service node needs to return source server in real time and obtains dynamic content; Under this situation; The received access request of source server is to come from the CDN service node, and through the TCP (ICP/IP protocol) of standard, the source network address that source server obtains is procotol (the Internet Protocol of CDN service node; IP) address; And be not to be the netizen's of request visit the network address, this just causes source server can't accurately carry out the netizen and visits statistics, for the load balancing that realizes the CDN network system etc. affects.
In the prior art; In order to address the above problem, need to realize the Transparent Proxy pattern, promptly when the access request with the user is redirected to the CDN service node that adopts the Transparent Proxy pattern to each CDN network node; The CDN service node of employing Transparent Proxy pattern is sent to source server with user's access request; And obtain the data of being asked in real time from source server, at this moment, owing to adopted the Transparent Proxy pattern; Source server is resulting to be user's access request, and is not to be the visit of CDN service node.
In the practical application, the CDN network system architecture is very complicated, and user's access request need be passed through a plurality of CDN service nodes can arrive source server, and this just needs all to adopt the Transparent Proxy pattern to each CDN service node, realizes complicacy and inefficiency.Visiting the domestic source server of national second and obtain dynamic content with the netizen of national first is example: when the netizen of national first need visit certain source server of national second and obtain dynamic content; In order to reach acceleration effect preferably; The CDN network system set up special line make the netizen of national first can fast access the domestic webserver of country's second; Its network architecture is the CDN service node A-of the netizen-national first of national first>source server of the CDN serving node B-national second of national second; Adopt the Transparent Proxy technology if only be; So that the source server of national second can be known the netizen's of national first IP address, then need the CDN service node A of national first and the CDN serving node B of national second all be set to the Transparent Proxy pattern, can make source server know the netizen's of national first IP address this moment.
In sum; A kind of simple effective method need be sought,, and then the quantity of calling party can be accurately added up so that source server can obtain the IP address of calling party; And effectively carry out the operations such as load balancing of CDN network, guarantee that the CDN network system can well operate.
Summary of the invention
The present invention provides Transparent Proxy implementation method, equipment and system in a kind of content distributing network; Use so that the source server in the content distributing network can obtain the network address of calling party; And then the quantity that can accurately add up calling party; Effectively to carry out the operations such as load balancing of CDN network, guarantee that the CDN network system can well operate.
The concrete technical scheme that the embodiment of the invention provides is following:
Transparent Proxy implementation method in a kind of content distributing network comprises:
The edge service node receives the access request that client is sent, and carries the network address of said client in this access request at least, obtains the network address of said client and is saved to the predeterminated position that hypertext transmits the protocol header of http protocol;
And said access request is sent to source server based on said http protocol.
A kind of server comprises:
Processing unit is used to receive the access request that client is sent, and carries the network address of said client in this access request at least, obtains the network address of said client and is saved to the predeterminated position that hypertext transmits the protocol header of http protocol;
Transmitting element is used for sending said access request based on said http protocol.
A kind of server comprises:
Receiving element is used to receive the access request of sending based on hypertext transmission http protocol, and the predeterminated position of the protocol header of said http protocol is preserved the network address of client;
Processing unit is used for the network address that obtains said client from the said predeterminated position of the protocol header of said http protocol.
The realization system of Transparent Proxy in a kind of content distributing network comprises:
Client is used for sending access request to said edge service node, carries the network address of said client in this access request at least;
The edge service node is used to receive the said access request that client is sent, and obtains the network address of said client and is saved to the predeterminated position that hypertext transmits the protocol header of http protocol, sends said access request based on said http protocol;
Middle-agent's service node or source server are used to receive the said access request that said edge service node sends based on said http protocol, and from the network address that the said predeterminated position of the protocol header of said http protocol obtains said client.
Based on technique scheme; In the embodiment of the invention, after the edge service node that directly is connected with client receives the access request that client sends, the network address that obtains the client of carrying in this access request; The network address of this client is saved to the predeterminated position of the protocol header of http protocol; And the access request of client is sent to source server based on this http protocol, thus make source server can obtain the network address of client, and then can accurately add up the quantity of calling party; And effectively carry out the operations such as load balancing of CDN network, guarantee that the CDN network system can well operate.
Description of drawings
Fig. 1 be in the embodiment of the invention in content distributing network Transparent Proxy realize system architecture diagram;
Fig. 2 be in the embodiment of the invention in content distributing network another Transparent Proxy realize system architecture diagram;
Fig. 3 is the server architecture figure in content distributing network in the embodiment of the invention;
Fig. 4 is another server architecture figure in content distributing network in the embodiment of the invention;
Fig. 5 is a method flow diagram of in content distributing network, realizing Transparent Proxy in the embodiment of the invention.
Embodiment
The network address that can obtain calling party for the source server that makes in the content distributing network; And then the quantity that can accurately add up calling party; And effectively carry out the operations such as load balancing of CDN network; Guarantee that the CDN network system can well operate, the embodiment of the invention provides Transparent Proxy implementation method, equipment and system in a kind of content distributing network.
Below in conjunction with accompanying drawing the preferred embodiment of the present invention is elaborated.
Among first embodiment, shown in accompanying drawing 1, the realization system of Transparent Proxy in a kind of content distributing network is provided, has mainly comprised:
In the system that the embodiment of the invention provided; Need to arrange each other between edge service node 102 and the source server 103 the preservation position of client network address in the protocol header of http protocol; After edge service node 102 receives the access request of clients 101 and therefrom obtains the network address of client, this network address is kept at the appointed position in the protocol header of http protocol.Source server is after receiving the access request of edge service node based on the http protocol transmission, and the position of from http header, arranging obtains the network address of client.In the practical application, the network address is internetworking protocol (Internet Protocol, IP) address of client.
Wherein, also be connected with at least one intermediary service node between edge service node 102 and the source server 103, edge service node 102 is sent to source server 103 based on the access request that http protocol sends behind each intermediary service node.Among this embodiment, edge service node 102 is the service node that directly is connected with client 101.
Among second embodiment, shown in accompanying drawing 2, the realization system of Transparent Proxy in another content distributing network is provided, has mainly comprised:
Middle-agent's service node 104 is used to receive the access request that edge service node 102 sends based on http protocol, and from the network address that the predeterminated position of the protocol header of http protocol obtains client 101.
In the present embodiment; After middle-agent's service node 104 obtains the network address of client 101 from the predeterminated position of the protocol header of http protocol; Also be used for based on http protocol when source server 103 sends access request; With the middle-agent's service node that carries 104 self networks address modification is the network address of client 101; By the network address that source server 103 obtains the client 101 of carrying in the http protocol, wherein, middle-agent's service node 104 is the service node that directly links to each other with source server 103.
In the system that present embodiment provided; Need edge service node 102 and the middle-agent's service node 104 preservation positions of agreement client network address in the protocol header of http protocol; After edge service node 102 receives the access request of clients 101 and therefrom obtains the network address of client, this network address is kept at the appointed position in the protocol header of http protocol.Middle-agent's service node 104 is after receiving the access request of edge service node based on the http protocol transmission, and the position of from http header, arranging obtains the network address of client.
Wherein, at least one intermediary service node is arranged between edge service node 102 and the middle-agent's service node 104, edge service node 102 is sent to middle-agent's service node 104 based on the access request that http protocol sends behind each intermediary service node.Among this embodiment, edge service node 102 is the service node that directly is connected with client 101, and middle-agent's service node 104 is the service node that directly is connected with source server 103.
Among the 3rd embodiment, based on the said system framework, shown in accompanying drawing 3, this embodiment provides a kind of server, mainly comprises with lower unit:
Transmitting element 302 is used for sending this access request based on this http protocol.
Among above-mentioned first embodiment and second embodiment edge service node 102 adopted is the server that this embodiment provided, i.e. the server of the server that provides of this embodiment for adopting with service node that client directly is connected.
Among the 4th embodiment, based on the said system framework, shown in accompanying drawing 4, this embodiment provides a kind of server, mainly comprises with lower unit:
Receiving element 401 is used to receive the access request of sending based on http protocol, and the predeterminated position of the protocol header of this http protocol is preserved the network address of client;
Source server among above-mentioned first embodiment or second embodiment or middle-agent's service node are adopted is the server that this embodiment provides; Promptly the server that provides of this embodiment is a source server, perhaps the middle-agent's service node for directly being connected with source server.
Wherein, When middle-agent's service node that this server is with source server directly is connected; Processing unit 402 also is used for after obtaining the network address of client; Based on http protocol when source server sends access request, the network address that this client is revised as in the network address of the middle-agent's service node that carries.
Among the 5th embodiment, shown in accompanying drawing 5, realize in content distributing network in the embodiment of the invention that the concrete grammar flow process of Transparent Proxy is following:
Step 501: the edge service node receives the access request that client is sent, and carries the network address of this client in this access request at least, obtains the network address of this client and is saved to the predeterminated position of the protocol header of http protocol.
Step 502: access request is sent to source server based on http protocol.
Wherein, be connected with at least one intermediary service node between edge service node and the source server.The edge service node is sent to source server based on the access request that http protocol sends behind each intermediary service node.
In a concrete realization, after source server receives the access request that the edge service node sends based on http protocol, from the network address that the predeterminated position of the protocol header of http protocol obtains client.
In another concrete realization; Suppose that with service node that source server directly links to each other be middle-agent's service node; After middle-agent's service node receives the access request that intermediary service node (like the upper level intermediary service node of intermediate code service node) sends based on http protocol, from the network address that the predeterminated position of the protocol header of http protocol obtains client.Preferably; After middle-agent's service node obtains the network address of client from the predeterminated position of the protocol header of http protocol; Middle-agent's service node based on http protocol when source server sends access request; With the network address that client is revised as in the network address of the middle-agent's service node that carries, the network address that obtains the client of carrying in the http protocol that receives by source server.Middle-agent's service node based on http protocol when source server sends request; Acquiescence is carried the self networks address; In the present embodiment; With the network address of middle-agent's service node self networks address modification that acquiescence is carried when source server sends request for the client of this request of transmission, thereby make source server can obtain the network address of the client of sending based on http protocol, this mode only needs middle proxy service node is suitably disposed and can realize.
In the practical application, in the protocol header of http protocol, set up special field, the network address of preset client in this special field.Because the information of the protocol header of http protocol has location independence, can the special field of setting up be arranged on the optional position in the protocol header of http protocol.
In the practical application; The special field of setting up in the http header can adopt arbitrary name; Only need to arrange each other to get final product with direct-connected edge service node of client and source server; Perhaps, arrange each other to get final product with the direct-connected edge service node of client with the direct-connected middle-agent's service node of source server.
For example; The name of the field of in the protocol header of http protocol, setting up is called cc-client; Concrete form is cc-client: < client ip address >; After then receiving the access request of client transmission with the direct-connected edge service node of client; Obtain the IP address of client, and the IP address of this client is saved in the cc-client field of protocol header of http protocol, then include following information: cc-client:192.168.1.1 in the protocol header of http protocol; Then the edge service node is sent to source server with access request through multistage intermediary service node based on http protocol; Source server receives the access request of sending based on http protocol, and obtains the IP address 192.168.1.1 of client in the cc-client field from the protocol header of http protocol by appointment, thereby source server can know that this access request is for being that the client of 192.168.1.1 is initiated by the IP address.
Again for example; The name of the field of in the protocol header of http protocol, setting up is called cc-client; Concrete form is cc-client: < client ip address >; After then receiving the access request of client transmission with the direct-connected edge service node of client; Obtain the IP address of client, and the IP address of this client is saved in the cc-client field of protocol header of http protocol, then include following information: cc-client:192.168.1.1 in the protocol header of http protocol; Then the edge service node is sent to access request and the direct-connected middle-agent's service node of source server through multistage intermediary service node based on http protocol; Middle-agent's service node receives the access request that upper level intermediary service node sends based on http protocol, and obtains the IP address 192.168.1.1 of client in the cc-client field from the protocol header of http protocol by appointment, and middle-agent's service node is according to the IP address of the client of obtaining; Based on http protocol when source server sends access request; With the IP address of middle-agent's service node of (in the field of the preservation source network address of http protocol) preservation in the http protocol, be revised as the IP address of preserving the client of obtaining, source server is after receiving access request based on http protocol; Only need the IP address that from http protocol, obtains transmitting terminal according to normal process, can know the IP address of the client of initiating access request.
Based on technique scheme; In the embodiment of the invention, after the edge service node that directly is connected with client receives the access request that client sends, the network address that obtains the client of carrying in this access request; The network address of this client is saved to the predeterminated position of the protocol header of http protocol; And the access request of client is sent to source server based on this http protocol, thus make source server can obtain the network address of client, and then can accurately add up the quantity of calling party; And effectively carry out the operations such as load balancing of CDN network, guarantee that the CDN network system can well operate.And, in the embodiment of the invention, through in the protocol header of http protocol, preserving the network address of client; The concurrent preservation position (or field title) of the network address in the protocol header of http protocol that takes the affair node and receive agreement client between the service node (or source server); Thereby can need not to change the existing C DN network architecture, can accurately add up the quantity of the client of visit, and all adopt the network architecture of Transparent Proxy compared to existing every grade of intermediary service node; Communication efficiency is high; Be convenient to safeguard and dispose, and can the compatible existing network architecture, realize simple.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. Transparent Proxy implementation method in the content distributing network is characterized in that, comprising:
The edge service node receives the access request that client is sent, and carries the network address of said client in this access request at least, obtains the network address of said client and is saved to the predeterminated position that hypertext transmits the protocol header of http protocol;
And said access request is sent to source server based on said http protocol.
2. the method for claim 1; It is characterized in that; Said source server receives the said access request that said edge service node sends based on said http protocol, and from the network address that the said predeterminated position of the protocol header of said http protocol obtains said client.
3. the method for claim 1 is characterized in that, is connected with at least one intermediary service node between said edge service node and the said source server;
Based on said http protocol said access request is sent to source server, comprises:
Said edge service node is sent to said source server based on the said access request that said http protocol sends behind each intermediary service node.
4. method as claimed in claim 3 is characterized in that, said edge service node is sent to said source server with said access request based on said http protocol behind each intermediary service node, comprising:
After the middle-agent's service node that directly is connected with said source server receives the said access request that the intermediary service node sends based on said http protocol, from the network address that the said predeterminated position of the protocol header of said http protocol obtains said client.
5. method as claimed in claim 4 is characterized in that, obtain the network address of said client from the said predeterminated position of the protocol header of said http protocol after, comprising:
Said middle-agent's service node based on http protocol when source server sends said access request; With the network address that said client is revised as in the network address of the said and said middle-agent's service node that carries, the network address that obtains the said client of carrying in the said http protocol by said source server.
6. a server is characterized in that, comprising:
Processing unit is used to receive the access request that client is sent, and carries the network address of said client in this access request at least, obtains the network address of said client and is saved to the predeterminated position that hypertext transmits the protocol header of http protocol;
Transmitting element is used for sending said access request based on said http protocol.
7. a server is characterized in that, comprising:
Receiving element is used to receive the access request of sending based on hypertext transmission http protocol, and the predeterminated position of the protocol header of said http protocol is preserved the network address of client;
Processing unit is used for the network address that obtains said client from the said predeterminated position of the protocol header of said http protocol.
8. server as claimed in claim 7; It is characterized in that; Said processing unit also is used for after obtaining the network address of said client, when source server sends said access request, the network address of carrying is revised as the network address of said client based on http protocol.
9. the realization system of Transparent Proxy in the content distributing network is characterized in that, comprising:
Client is used for sending access request to the edge service node, carries the network address of said client in this access request at least;
The edge service node is used to receive the said access request that client is sent, and obtains the network address of said client and is saved to the predeterminated position that hypertext transmits the protocol header of http protocol, sends said access request based on said http protocol;
Middle-agent's service node or source server are used to receive the said access request that said edge service node sends based on said http protocol, and from the network address that the said predeterminated position of the protocol header of said http protocol obtains said client.
10. system as claimed in claim 9; It is characterized in that; After said middle-agent's service node obtains the network address of said client from the said predeterminated position of the protocol header of said http protocol; Also be used for based on http protocol when source server sends said access request; With the network address that said client is revised as in the network address of the said middle-agent's service node that carries, by the network address that said source server obtains the said client of carrying in the said http protocol, said middle-agent's service node is the service node that directly links to each other with said source server.
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| CN110708328A (en) * | 2019-10-16 | 2020-01-17 | 南京焦点领动云计算技术有限公司 | Website static resource anti-stealing link method |
| CN110933190A (en) * | 2019-10-18 | 2020-03-27 | 平安科技（深圳）有限公司 | Client address obtaining method and device, storage medium and computer equipment |
| CN110933190B (en) * | 2019-10-18 | 2022-09-27 | 平安科技（深圳）有限公司 | Client address acquisition method and device, storage medium and computer equipment |
| CN112235271A (en) * | 2020-09-29 | 2021-01-15 | 新浪网技术(中国)有限公司 | Content Delivery Network (CDN) equipment and self-adaptive safe source returning method thereof |
| CN112235271B (en) * | 2020-09-29 | 2023-05-02 | 新浪技术（中国）有限公司 | CDN (content delivery network) equipment and self-adaptive safe source returning method thereof |
| CN113746918A (en) * | 2021-09-03 | 2021-12-03 | 上海幻电信息科技有限公司 | Hypertext transfer protocol proxy method and system |
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