CN102790798B - Transparent proxy implementation, equipment and system in a kind of content distributing network - Google Patents
Transparent proxy implementation, equipment and system in a kind of content distributing network Download PDFInfo
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Abstract
The invention discloses transparent proxy implementation in a kind of content distributing network, in order to the network address making the source server in content distributing network can obtain calling party, and then the quantity of accurate statistics calling party, effectively to carry out the operations such as the load balancing of CDN, ensure that CDN system can well operate.The method is: edge service node receives the access request that client sends, the network address of described client is at least carried in this access request, obtain the network address of described client and be saved to the predeterminated position of the protocol header of Hyper text transfer http protocol, and based on described http protocol, described access request being sent to source server.What the present invention discloses Transparent Proxy in a kind of server and a kind of content distributing network realizes system.
Description
Technical field
The present invention relates to networking technology area, particularly relate to transparent proxy implementation, equipment and system in a kind of content distributing network.
Background technology
Content distributing network (ContentDeliveryNetwork, CDN) in, when user needs to obtain data content from source station, the access of user is guided on caching server (Cache servers), user is made to obtain the corresponding data content coming from source server of buffer memory from Cache servers, thus avoid because access link is good and cause obtaining the slower problem of data from source server, reach the effect accelerating access.CDN can in real time according to the connection of network traffics and each CDN service node, load state and the access request of user again to be led from the nearest CDN service node of user to the integrated information such as Distance geometry response time of user, and this CDN service node obtains the data content of user's request from source server in real time according to the access request of user and is buffered in this locality (this CDN service node is Cache servers).Make user can obtain required content from nearest CDN service node like this, and without the need to arriving source server, thus solve the crowded situation of Internet network, improve the response speed of user's access websites.
But, in CDN, CDN service node needs to return source server in real time and obtains dynamic content, in this situation, access request received by source server comes from CDN service node, by the TCP/IP (ICP/IP protocol) of standard, the source network address that source server obtains is the procotol (InternetProtocol of CDN service node, IP) address, and be not the network address of the netizen of request access, this just causes source server accurately cannot carry out netizen's acess control, for the load balancing etc. realizing CDN system affects.
In prior art, in order to solve the problem, need to realize Transparent Proxy pattern for each CDN node, namely when the access request of user being redirected to the CDN service node adopting Transparent Proxy pattern, adopt the CDN service node of Transparent Proxy pattern that the access request of user is sent to source server, and from the data that source server Real-time Obtaining is asked, now, owing to have employed Transparent Proxy pattern, the access request for user that source server obtains, and be not the access of CDN service node.
In practical application, CDN system architecture is very complicated, and the access request of user needs can arrive source server through multiple CDN service node, and this just needs all to adopt Transparent Proxy pattern for each CDN service node, realizes complexity and inefficiency.Access the domestic source server of national second for the netizen of national first and obtain dynamic content: when the netizen of national first needs to access certain source server of national second and obtains dynamic content, in order to reach good acceleration effect, the webserver that CDN system erection special line enables netizen's fast access of national first country second domestic, its network architecture is the source server of the CDN service Node B-> country second of the CDN service node A-> country second of the netizen-> country first of national first, if be only adopt Transparent Proxy technology, with the IP address enabling the source server of national second know the netizen of national first, the CDN service node A of national first and the CDN service Node B of national second is then needed all to be set to Transparent Proxy pattern, source server now can be made to know the IP address of the netizen of national first.
In sum, need to seek a kind of simple effective method, with the IP address enabling source server obtain calling party, and then can the quantity of accurate statistics calling party, and effectively carry out the operations such as the load balancing of CDN, ensure that CDN system can well operate.
Summary of the invention
The invention provides transparent proxy implementation, equipment and system in a kind of content distributing network, in order to the network address making the source server in content distributing network can obtain calling party, and then can the quantity of accurate statistics calling party, effectively to carry out the operations such as the load balancing of CDN, ensure that CDN system can well operate.
The concrete technical scheme that the embodiment of the present invention provides is as follows:
Transparent proxy implementation in a kind of content distributing network, comprising:
Edge service node receives the access request that client sends, and at least carries the network address of described client in this access request, obtains the network address of described client and is saved to the predeterminated position of the protocol header of Hyper text transfer http protocol;
And based on described http protocol, described access request is sent to source server.
A kind of server, comprising:
Processing unit, for receiving the access request that client sends, at least carries the network address of described client in this access request, obtain the network address of described client and be saved to the predeterminated position of the protocol header of Hyper text transfer http protocol;
Transmitting element, for sending described access request based on described http protocol.
A kind of server, comprising:
Receiving element, for receiving the access request sent based on Hyper text transfer http protocol, the predeterminated position of the protocol header of described http protocol preserves the network address of client;
Processing unit, the described predeterminated position for the protocol header from described http protocol obtains the network address of described client.
In content distributing network Transparent Proxy realize a system, comprising:
Client, for sending access request to described edge service node, at least carries the network address of described client in this access request;
Edge service node, for receiving the described access request that client sends, obtaining the network address of described client and being saved to the predeterminated position of the protocol header of Hyper text transfer http protocol, sending described access request based on described http protocol;
Middle-agent's service node or source server, for receiving the described access request that described edge service node sends based on described http protocol, and obtain the network address of described client from the described predeterminated position of the protocol header of described http protocol.
Based on technique scheme, in the embodiment of the present invention, after the edge service node be directly connected with client receives the access request that client sends, obtain the network address of 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 based on this http protocol, the access request of client is sent to source server, thus make source server can obtain the network address of client, and then can the quantity of accurate statistics calling party, and effectively carry out the operations such as the load balancing of CDN, ensure that CDN system can well operate.
Accompanying drawing explanation
Fig. 1 is that in the embodiment of the present invention, in content distributing network, Transparent Proxy realizes system architecture diagram;
Fig. 2 is that in the embodiment of the present invention, in content distributing network, another Transparent Proxy realizes system architecture diagram;
Fig. 3 is the server architecture figure in the embodiment of the present invention in content distributing network;
Fig. 4 is another server architecture figure in the embodiment of the present invention in content distributing network;
Fig. 5 is the method flow diagram realizing Transparent Proxy in the embodiment of the present invention in content distributing network.
Embodiment
In order to the network address making the source server in content distributing network can obtain calling party, and then can the quantity of accurate statistics calling party, and effectively carry out the operations such as the load balancing of CDN, ensure that CDN system can well operate, embodiments provide transparent proxy implementation, equipment and system in a kind of content distributing network.
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is described in detail.
In first embodiment, as shown in Figure 1, what provide Transparent Proxy in a kind of content distributing network realizes system, mainly comprises:
Client 101, for sending access request to edge service node, at least carries the network address of client in this access request;
Edge service node 102, for receiving the access request that client 101 sends, obtain the network address of client 101 and be saved to the predeterminated position of the protocol header of Hyper text transfer (HypertextTransportProtocol, HTTP) agreement, sending access request based on this http protocol;
Source server 103, for receiving the access request that edge service node 102 sends based on http protocol, and obtains the network address of client 101 from the predeterminated position of the protocol header of http protocol.
In the system that the embodiment of the present invention provides, need the preservation position of the mutual subscribed client network address in the protocol header of http protocol between edge service node 102 and source server 103, edge service node 102 receives the access request of client 101 and after therefrom obtaining 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 that edge service node sends based on http protocol, and the position of arranging from http header obtains the network address of client.In practical application, the network address is internetworking protocol (InternetProtocol, the IP) address of client.
Wherein, be also connected with at least one intermediary service node between edge service node 102 and source server 103, the access request that edge service node 102 sends based on http protocol is sent to source server 103 after each intermediary service node.In this embodiment, edge service node 102 is the service node be directly connected with client 101.
In second embodiment, as shown in Figure 2, what provide Transparent Proxy in another content distributing network realizes system, mainly comprises:
Client 101, for sending access request to edge service node 102, at least carries the network address of client 101 in this access request;
Edge service node 102, for receiving the access request that client 101 sends, obtaining the network address of client 101 and being saved to the predeterminated position of the protocol header of http protocol, sending this access request based on http protocol;
Middle-agent's service node 104, for receiving the access request that edge service node 102 sends based on http protocol, and obtains the network address of client 101 from the predeterminated position of the protocol header of http protocol.
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 for when sending access request based on http protocol to source server 103, the network address of the middle-agent's service node 104 carried self is revised as the network address of client 101, the network address of the client 101 of carrying in http protocol is obtained by source server 103, wherein, middle-agent's service node 104 is the service node be directly connected with source server 103.
In the system that the present embodiment provides, need edge service node 102 and the middle-agent's service node 104 subscribed client network address preservation position in the protocol header of http protocol, edge service node 102 receives the access request of client 101 and after therefrom obtaining 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 that edge service node sends based on http protocol, and the position of arranging from http header obtains the network address of client.
Wherein, have at least one intermediary service node between edge service node 102 and middle-agent's service node 104, the access request that edge service node 102 sends based on http protocol is sent to middle-agent's service node 104 after each intermediary service node.In this embodiment, edge service node 102 is the service node be directly connected with client 101, and middle-agent's service node 104 is the service node be directly connected with source server 103.
In 3rd embodiment, based on said system framework, as shown in Figure 3, this embodiment offers a kind of server, mainly comprise with lower unit:
Processing unit 301, for receiving the access request that client sends, at least carries the network address of client in this access request, obtain the network address of this client and be saved to the predeterminated position of the protocol header of http protocol;
Transmitting element 302, for sending this access request based on this http protocol.
The server provided for this embodiment that edge service node 102 in above-mentioned first embodiment and the second embodiment adopts, the server that namely this embodiment provides is the server that the service node be directly connected with client adopts.
In 4th embodiment, based on said system framework, as shown in Figure 4, this embodiment offers a kind of server, mainly comprise with lower unit:
Receiving element 401, for receiving the access request sent based on http protocol, the predeterminated position of the protocol header of this http protocol preserves the network address of client;
Processing unit 402, the predeterminated position for the protocol header from this http protocol obtains the network address of client.
The server that this embodiment that what the source server in above-mentioned first embodiment or the second embodiment or middle-agent's service node adopted be provides, namely the server that this embodiment provides is source server, or the middle-agent's service node for being directly connected with source server.
Wherein, when this server is the middle-agent's service node be directly connected with source server, processing unit 402 is also for behind the network address obtaining client, when sending access request based on http protocol to source server, the network address of the middle-agent's service node carried is revised as the network address of this client.
In 5th embodiment, as shown in Figure 5, the concrete grammar flow process realizing Transparent Proxy in the embodiment of the present invention in content distributing network is as follows:
Step 501: edge service node receives the access request that client sends, and at least carries the network address of this client in this access request, 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, at least one intermediary service node is connected with between edge service node and source server.The access request that edge service node sends based on http protocol is sent to source server after each intermediary service node.
In a concrete realization, after source server receives the access request that edge service node sends based on http protocol, from the network address of the predeterminated position acquisition client of the protocol header of http protocol.
In the realization that another is concrete, suppose that the service node be directly connected with source server is middle-agent's service node, after middle-agent's service node receives the access request that intermediary service node (the upper level intermediary service node as intermediate code service node) sends based on http protocol, from the network address of the predeterminated position acquisition client of the protocol header of http protocol.Preferably, after middle-agent's service node obtains the network address of client from the predeterminated position of the protocol header of http protocol, when middle-agent's service node sends access request based on http protocol to source server, the network address of the middle-agent's service node carried is revised as the network address of client, is obtained the network address of the client of carrying in the http protocol received by source server.Middle-agent's service node is when sending request to source server based on http protocol, give tacit consent to the network address of carrying self, in the present embodiment, the network address that the client sending this request is revised as in the network address of self of carrying is given tacit consent to when being sent request to source server by middle-agent's service node, thus making source server can obtain the network address of the client sent based on http protocol, which only needs to carry out suitably configuration to middle proxy service node and can realize.
In practical application, in the protocol header of http protocol, set up special field, in this special field, preset the network address of client.Because the information of the protocol header of http protocol has location independence, the special field of setting up can be arranged on the optional position in the protocol header of http protocol.
In practical application, the special field of setting up in http header can adopt arbitrary name, the edge service node that only directly need be connected with client and source server are arranged mutually, or, the edge service node be directly connected with client and mutually arranging with middle-agent's service node that source server is directly connected.
Such as, the name of the field of setting up in the protocol header of http protocol is called cc-client, concrete form is cc-client:< client ip address >, after the edge service node be then directly connected with client receives the access request that client sends, obtain the IP address of client, and the IP address of this client is saved in the cc-client field of the protocol header of http protocol, following information is included: cc-client:192.168.1.1 in the protocol header of then http protocol, then access request is sent to source server through multistage intermediary service node based on http protocol by edge service node, source server receives the access request sent based on http protocol, and from the cc-client field the protocol header of http protocol, the IP address 192.168.1.1 of client is obtained according to agreement, thus source server can know that this access request is that the client being 192.168.1.1 by IP address is initiated.
Again such as, the name of the field of setting up in the protocol header of http protocol is called cc-client, concrete form is cc-client:< client ip address >, after the edge service node be then directly connected with client receives the access request that client sends, obtain the IP address of client, and the IP address of this client is saved in the cc-client field of the protocol header of http protocol, following information is included: cc-client:192.168.1.1 in the protocol header of then http protocol, then access request is sent to the middle-agent's service node be directly connected with source server by edge service node 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 from the cc-client field the protocol header of http protocol, the IP address 192.168.1.1 of client is obtained according to agreement, middle-agent's service node is according to the IP address of the client obtained, when sending access request based on http protocol to source server, by the IP address of middle-agent's service node that (in the field of the preservation source network address of http protocol) in http protocol preserves, be revised as the IP address of preserving the client obtained, source server is after receiving access request based on http protocol, only need obtain the IP address of transmitting terminal from http protocol according to normal process, the IP address of the client initiating access request can be known.
Based on technique scheme, in the embodiment of the present invention, after the edge service node be directly connected with client receives the access request that client sends, obtain the network address of 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 based on this http protocol, the access request of client is sent to source server, thus make source server can obtain the network address of client, and then can the quantity of accurate statistics calling party, and effectively carry out the operations such as the load balancing of CDN, ensure that CDN system can well operate.And, in the embodiment of the present invention, by preserving the network address of client in the protocol header of http protocol, the concurrent preservation position (or field name) of the network address in the protocol header of http protocol sent service node and receive subscribed client between service node (or source server), thus can without the need to changing existing CDN framework, get final product the quantity of the client of accurate statistics access, and the network architecture of Transparent Proxy is all adopted 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 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 (5)
1. a transparent proxy implementation in content distributing network, is characterized in that, comprising:
Edge service node receives the access request that client sends, and at least carries the network address of described client in this access request, obtains the network address of described client and is saved to the predeterminated position of the protocol header of Hyper text transfer http protocol;
And based on described http protocol, described access request is sent to source server, receive by described source server the described access request that described edge service node sends based on described http protocol, and obtain the network address of described client from the described predeterminated position of the protocol header of described http protocol;
Wherein, the preservation position of the network address in the protocol header of http protocol of described client is mutually arranged between described edge service node and described source server.
2. the method for claim 1, is characterized in that, is connected with at least one intermediary service node between described edge service node and described source server;
Based on described http protocol, described access request is sent to source server, comprises:
The described access request that described edge service node sends based on described http protocol is sent to described source server after each intermediary service node.
3. method as claimed in claim 2, it is characterized in that, described access request is sent to described source server based on described http protocol by described edge service node after each intermediary service node, comprising:
The middle-agent's service node be directly connected with described source server obtains the network address of described client after receiving the described access request that intermediary service node sends based on described http protocol from the described predeterminated position of the protocol header of described http protocol.
4. an edge service node, is characterized in that, comprising:
Processing unit, for receiving the access request that client sends, at least carries the network address of described client in this access request, obtain the network address of described client and be saved to the predeterminated position of the protocol header of Hyper text transfer http protocol;
Transmitting element, for sending described access request to source server based on described http protocol, receive by described source server the described access request that described edge service node sends based on described http protocol, and obtain the network address of described client from the described predeterminated position of the protocol header of described http protocol;
Wherein, the preservation position of the network address in the protocol header of http protocol of described client is mutually arranged between edge service node and described source server.
5. in content distributing network Transparent Proxy realize a system, it is characterized in that, comprising:
Client, for sending access request to edge service node, at least carries the network address of described client in this access request;
Edge service node, for receiving the described access request that client sends, obtaining the network address of described client and being saved to the predeterminated position of the protocol header of Hyper text transfer http protocol, sending described access request based on described http protocol;
Middle-agent's service node or source server, for receiving the described access request that described edge service node sends based on described http protocol, and obtain the network address of described client from the described predeterminated position of the protocol header of described http protocol.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103856413A (en) * | 2012-11-30 | 2014-06-11 | 英业达科技有限公司 | Information processing system and method thereof |
| CN103001967B (en) * | 2012-12-13 | 2016-12-21 | 北京奇虎科技有限公司 | Source station server and service push method |
| CN103209222A (en) * | 2013-04-24 | 2013-07-17 | 网宿科技股份有限公司 | Method and device for processing requests with overlapped and unordered ranges in content delivery network |
| CN103237031B (en) * | 2013-04-26 | 2016-04-20 | 网宿科技股份有限公司 | Time source side method and device in order in content distributing network |
| CN107347015B (en) * | 2016-05-06 | 2020-12-04 | 阿里巴巴集团控股有限公司 | Method, device and system for identifying content distribution network |
| CN107493232B (en) * | 2016-06-12 | 2020-12-01 | 阿里巴巴集团控股有限公司 | CDN access acceleration method and device |
| CN109246164A (en) * | 2017-07-10 | 2019-01-18 | 中兴通讯股份有限公司 | A kind of access method, apparatus and system virtualizing network based on cloud |
| CN109769023B (en) * | 2019-01-16 | 2021-11-19 | 网宿科技股份有限公司 | Data transmission method, related server and storage medium |
| CN109831511B (en) * | 2019-02-18 | 2020-10-23 | 华为技术有限公司 | Method and equipment for scheduling content delivery network CDN edge nodes |
| CN110636068B (en) * | 2019-09-24 | 2022-01-28 | 杭州安恒信息技术股份有限公司 | Method and device for identifying unknown CDN node in CC attack protection |
| CN110708328B (en) * | 2019-10-16 | 2022-04-05 | 南京焦点领动云计算技术有限公司 | Website static resource anti-stealing link method |
| 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 |
| 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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| CN101202684A (en) * | 2006-12-15 | 2008-06-18 | 中国电信股份有限公司 | Method for close judgment of user in content distributing network |
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| US7865585B2 (en) * | 2007-03-12 | 2011-01-04 | Citrix Systems, Inc. | Systems and methods for providing dynamic ad hoc proxy-cache hierarchies |
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