JP2002366415A - Redirection system and redirection device - Google Patents

Abstract

(57) [Problem] To provide a redirect system capable of notifying a client terminal of a redirect destination adapted to the client terminal. When a redirection device receives an IP packet from a client accommodation device, the redirection device extracts content information and identification information, and checks whether there is content information matching the content information from a content information database. If there is content information in the content information database, the identification information database is searched based on the identification information, the IP address of the mirror Web server 42 that matches the identification information is obtained, and the content information and the mirror information are passed through the client accommodation device 20. Client terminal 11
Send to

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an original Web server for providing contents and a plurality of mirrors holding the contents of the original Web server in whole or in part.
Web server and IP address are uniquely assigned,
The present invention relates to a redirection system in which a client terminal receiving content from an original web server or a mirror web server is connected to a network, and when a client requests content to be mirrored, a content request is redirected from the original web server to the mirror web server.

[0002]

2. Description of the Related Art When a client terminal requests mirror target content, a mirror W is sent from an original Web server.
As a method of redirecting to the eb server, there are known a method of specifying a redirect destination by a DNS (Domain Name Service Server) and a method of specifying by an HTML document of an original Web server.

The method of specifying the redirect destination by DNS is as follows:
This method redirects the DNS server settings that convert the domain name in the URL entered in the Web browser of the client terminal to an IP address to the mirror Web server instead of the original Web server. Obtain the IP address of the mirror Web server at the name search request stage and make an Http request to the mirror Web server.

[0004] Further, a method of specifying the redirect destination by the HTML document of the original Web server is as follows.
H to the mirror Web server described in the HTML document of the server again
Make a ttp connection.

[0005] These redirection methods use mirror Web
This method uses the IP addresses of the server and the client terminal to redirect to the mirror Web server based on hop count, ping response time, hash function, round robin information, and the like.

[0006]

That is, in the conventional technology, the IP address is redirected based on the IP address,
Since addresses are assigned without regard to the geographical location or importance of client terminals or Web servers, at present, it is not possible to change the redirect destination depending on the classification of clients other than IP addresses.

An object of the present invention is to provide a redirect system which can notify a client terminal of a redirect destination adapted.

[0008]

In order to achieve the above object, a redirection system according to the present invention has a client accommodating device connected to a network and accommodating at least one client terminal, and a redirection device.

When the client accommodating device detects an IP packet sent from the client terminal accommodated therein, it has means for notifying the redirect device of unique identification information preset for itself.

The redirect device includes an identification information database storing the identification information of the client accommodation device, the IP address of the mirror Web server, and the identification information in association with each other;
When the identification information is acquired from the content information database that manages the content information of the mirror Web server and the client accommodation device, a mirror Web server associated with the client accommodation device is searched from the identification information database with the identification information corresponding to the identification information. Means for selecting, and, when a content request from the client terminal is obtained, means for confirming whether or not there is content information matching the content request from the content information database;
It has means for returning to the content terminal a redirect request and a content request confirming the existence of the content information.

According to the present invention, a redirect destination for a content request from a client terminal is assigned based on identification information of the client terminal and the mirror Web server.

[0012] Thus, the redirect destination adapted to the client terminal can be notified to the client terminal.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 1, a redirect system according to an embodiment of the present invention includes a client accommodation device 20,
Redirect device 30 and original Web server 41
And mirror Web servers 42a and 42b, which are connected to each other via the Internet 100, and are assigned unique IP addresses on the network. The client terminal 11 is connected to the client accommodation terminal 20.

The original Web server 41 and the mirror Web servers 42a and 42b can transmit the requested contents to the client IP address when the client terminal 11 requests the contents. Also,
The mirror Web servers 42a and 42b are the original Web servers 4.
One or all of the files are stored.

The client terminal 11 is a terminal that receives an Internet service. The client terminal 11 is assigned a unique IP address in the Internet communication network. The client terminal 11 has a Web browser for browsing Web information, and the Web server 4
Request Web content from 1, 42a, 42b
The content can be received and viewed from the servers 41, 42a, and 42b.

The client accommodation device 20 is located between the Internet 100 and the client terminal 11. When the client terminal 11 transmits an IP packet to the redirect device 30, the identification information held by the client accommodation device 20 is transmitted to the redirect device 30. Notice.

The redirect device 30 is used to identify the client accommodating device 20 and the IP address of the original Web server 41.
It holds an address, an IP address of the mirror Web servers 42a and 42b and an identification information database for managing the identification information, and a content database of the mirror Web servers 42a and 42b. The redirection device 30 uses the mirror Web based on the identification information acquired from the client accommodation device 20.
The IP addresses of the servers 42a and 42b are searched from the identification information management database, and a redirect destination and a content request to the client terminal 11 are transmitted to a URL (Uniform Resource Locato).
r) and has the function of notifying.

The identification information is for enabling the classification of clients such as geographical locations such as prefectures and municipalities and the degree of importance, and the identification information stored in the client accommodating device 20 and the redirect device 30. Are the same.

As shown in FIG. 2, the client accommodating device 20 includes a control unit 21 and a client-side interface 2.
2, an Internet-side interface 23, and an identification information storage unit 24.

The client accommodating device 20 communicates with the client terminal 11 via the client-side interface 22.
The Internet interface 23 connects to the Internet 100. The client interface 22 and the Internet interface 23 have physical input / output ports, and perform IP packet communication for transmitting and receiving IP packets to and from the outside via the physical input / output ports. It is a device having functions. The control unit 21 has a function of adding the identification information of the identification information storage unit 24 to the IP packet received from the client-side interface 22 and outputting the IP packet to the Internet-side interface 23, and a function of transmitting the IP packet received from the Internet-side interface unit 23 to the client side. It has a function of outputting to the interface 22.

As shown in FIG. 3, the redirect device 30 includes a control unit 31 and an Internet interface 32.
And a program section 33, an identification information database 34, a content information database 35, and a client IP address storage section 36.

The Internet interface 32
It has a packet communication function of transmitting and receiving IP packets via physical input / output ports. This is to input the IP packet received at the physical input / output port to the control unit 31,
It has a function of transmitting an IP packet output from the control unit 31 from a physical input / output port. In the identification information database 34, the IP address of the original Web server 41, the IP addresses of the mirror Web servers 42a and 42b and the identification information,
The identification information of the client accommodation device 20 is set in advance. The content information database 35 is a mirror Web
The content information (the part excluding the domain name of the URL) of the servers 42a and 42b is set in advance.

FIG. 4 shows a control unit 31 of the redirect device 30.
It is an explanatory view showing the operation of.

When the control unit 31 receives an IP packet from the Internet interface 32 (), the content information of the packet and the identification information of the client accommodating device 20 are sent to the program unit 33 (), and the source IP address is stored in the client IP address. It is transmitted to the unit 36 (). When the Web server IP address and the content information are sent from the program unit 33 (), the client IP address is extracted from the client IP address storage unit 36 (), and the Internet interface 3 is sent to the client terminal 11 as a redirect request.
(2).

FIG. 5 is an explanatory diagram showing the operation of the program unit 33 in the redirect device 30.

When the program unit 33 receives the content information and the identification information from the control unit 31 (), first,
It is confirmed from the content information database 35 whether or not there is content information that matches the content request (). If there is content information in the content information database 35, the identification information is transferred to the identification information database 34.
The search is performed based on the identification information (), and the IP address of the mirror Web server 42 that matches the identification information is obtained (). If it does not match the identification information in the identification information database 34, the IP address of the original Web server 41 is obtained (). If there is no content information in the content information database 35 (), the identification information database 34
The IP address of the original Web server 41 corresponding to the domain of the content provider is obtained from (). When acquiring the IP address from the identification information database 34, the program unit 33 sends the IP address and the content information to the control unit 31 ().

The IP address and the content information sent to the control unit 31 are sent to the client terminal 11 via the client accommodation device 20. The client terminal 11 requests the Web server indicated by the IP address for the content indicated by the content information, and receives and browses the content.

[0029]

As described above, according to the present invention, by providing identification information to a client accommodating device, it becomes possible to notify the client terminal of a redirect destination adapted to the client terminal. By associating the identification information of the redirect device with the identification information of the redirect device, it is possible to provide a service that differentiates a client that is not accommodated in the client accommodation device from a client that is accommodated.

[Brief description of the drawings]

FIG. 1 is a block diagram of a redirect system according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a client accommodation device 20.

FIG. 3 is a block diagram showing a configuration of a redirect device 30.

FIG. 4 is an explanatory diagram showing an operation of a control unit of the redirect device 30.

FIG. 5 is an explanatory diagram showing an operation of a program unit of the redirect device 30.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Client terminal 20 Client accommodation device 21 Control part 22 Client side interface 23 Internet side interface 24 Identification information storage part 30 Redirect device 31 Control part 32 Internet interface 33 Program part 34 Identification information database 35 Content information database 36 Client IP address storage part 41 Original Web server 42a, 42b Mirror Web server 100 Internet

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuyuki Okumura 2-3-1 Otemachi, Chiyoda-ku, Tokyo Within Nippon Telegraph and Telephone Corporation (72) Keiichi Hishikawa 3-19, Nishishinjuku, Shinjuku-ku, Tokyo No. 2 Tonichi Fukushima Telegraph and Telephone Corporation F-term (reference) 5B082 DE03 HA08 HA09 5B085 BG07 CA04

Claims (8)

[Claims] An original Web server that provides contents, a plurality of mirror Web servers that hold all or part of the contents of the original Web server, and an IP address that is uniquely assigned to the original Web server.
In a redirect system in which a client terminal receiving content from a server or a mirror web server is connected to a network and the client requests mirror target content, a content request is redirected from the original web server to the mirror web server. A client accommodating device accommodating at least one, and a redirect device are connected to the network, and the client accommodating device detects an IP packet transmitted from a client terminal accommodated therein,
The redirect device has means for notifying the redirect device of unique identification information preset to itself, and the redirect device stores the identification information of the client accommodation device, the IP address of the mirror Web server and the identification information in association with each other. An identity database that
When the content information database managing the content information of the mirror web server and the identification information are acquired from the client accommodation device, the IP of the mirror web server associated with the client accommodation device with the identification information corresponding to the identification information. Means for retrieving and selecting an address from the identification information database, means for acquiring a content request from the client terminal, for confirming whether there is content information matching the content request from the content information database, And a means for returning a content request confirming the existence of content information to the client terminal. 2. The redirection device, if there is no mirror Web server corresponding to the identification information acquired from the client accommodation device and the identification information, the original W
The system of claim 1, further comprising means for selecting an eb server instead of a mirror web server. 3. The redirection device according to claim 1, wherein the redirection device has a unit for designating the original web server as a redirection destination if a content database matching the content request does not exist in the content information database. system. 4. The method according to claim 1, wherein the identification information of the client accommodating device enables classification of the client, and is the same classification as the identification information stored in the identification information database of the redirect device. A system according to any one of the preceding claims. 5. The system according to claim 1, wherein said network is an Internet communication network. 6. An original Web server that provides contents, a plurality of mirror Web servers that hold all or part of the contents of the original Web server, and an IP address that is uniquely assigned to the original Web server.
A redirect device in a redirect system in which a client terminal receiving content from a server or a mirror web server is connected to a network, and when the client requests content to be mirrored, a content request is redirected from the original web server to the mirror web server. A client accommodating apparatus, which accommodates at least one client terminal and, when detecting an IP packet transmitted from the client terminal accommodated therein, outputs a unique identification information preset in itself. An identification information database that stores identification information in association with an IP address of the mirror web server and identification information, a content information database that manages content information of the mirror web server, When acquiring the identification information from the accommodation device, the identification information database searches for the mirror Web server associated with the client accommodation device with the identification information corresponding to the identification information from the identification information database, and selects a content request from the client terminal. When it is obtained, a redirection comprising means for confirming the presence or absence of content information matching the content request from the content information database, a redirect destination, and means for returning the content request confirming the existence of the content information to the client terminal apparatus. 7. The system according to claim 6, further comprising means for selecting the original Web server instead of the mirror Web server if there is no mirror Web server whose identification information matches the identification information obtained from the client accommodation device. Equipment. 8. The apparatus according to claim 6, further comprising means for designating the original Web server as a redirect destination if a content database matching the content request does not exist in the content information database.