JPH11242639A - Proxy server - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain improvement in the efficiency of a network by providing a proxy server for performing edition of information or access management. SOLUTION: When a user request is sent from a user terminal 5 through a LAN or dial-up 4 to a proxy server 3, the proxy server 3 watches its contents, and when it is a request for which access is inhibited by a network manager or user, a result of connection-disable is returned to the user terminal 5. When the access is not inhibited for the request, the user request is sent through an internet 2 to a hyper text transfer protocol(HTTP) server 1 as it is and information in a hyper text mark-up language(HTML) is received from the HTTP server 1. The proxy server 3 adds information to the received information in HTML or performs an edition such as deletion of description containing a list to which access is inhibited, or of unwanted information corresponding to the instruction of the network manager or user, and returns the edited information in HTML through the LAN or dial-up 4 to the user terminal 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information editing technique in a network, and more particularly to a technique for editing response information from an access destination to a request from a user in a network and returning the information to the user.

[0002]

2. Description of the Related Art Conventionally, this type of HTML (Hyper Text M
As shown in FIG. 3, the technology of editing arkup language (arkup language) information is HTTP (Hyper Text Transform) that provides information.
It has functions such as executing a script on a (fer Protocol) server and sending the result to display a message according to the access time. This is CG
I (Common Gateway Interface) and SSI (Server Sid
e Include).

As an insertion technique of an advertisement or the like, as shown in FIG. 4, an example of displaying an advertisement using a dedicated browser on a receiving terminal (ASCII / Internet freeway) is known. .

[0004]

The editing of the conventional HTML information shown in FIG. 3 can be performed only on the side that provides the information.
It must be displayed by a dedicated browser installed on the receiving terminal.

An object of the present invention is to increase the efficiency of network operation by arranging a proxy server for editing information, managing access, and the like in a network.

[0006]

SUMMARY OF THE INVENTION A proxy server according to the present invention edits information sent from a connected server in accordance with an instruction of a user or a network administrator, and provides or restricts a service. is there.

FIG. 1 shows an example of the basic configuration of the present invention. An HTTP server 1 and a user terminal 5 are connected to the Internet 2, a proxy server 3 according to the present invention, and an LA.
N or via dial-up 4.

When a user request is sent from the user terminal 5 to the proxy server 3 via the LAN or the dial-up 4, the proxy server 3 looks at the contents of the user request, and the request is accessed by the network administrator or the user. URL is prohibited
If the request is for (Uniform Resource Locator), a result indicating that connection to the user terminal 5 is not possible is immediately returned.

If the request does not prohibit access, the HTT is passed through the Internet 2 as it is.
A user request is sent to the P server 1, and the proxy server 3 receives the HTML information from the HTTP server 1. The proxy server 3 adds information to the received HTML information according to an instruction of a network administrator or a user,
It edits the description including the list of which access is prohibited and deletes unnecessary information, and transmits the edited HTML information to the user terminal 5 via the LAN or the dial-up 4.

[0010]

FIG. 2 is a block diagram showing a proxy server according to the present invention. The proxy server of the present invention comprises:
A receiving unit 31 for receiving a request from a user, a request permission / non-permission determining unit 32 for determining whether or not a request from the user is permitted with reference to an access denial list; A user terminal information storage unit 34 for temporarily storing information related to the user terminal, an access denial list storage unit 35 for storing an access denial list that prohibits user access, and an HTM transmitted from the HTTP server.
An HTML information receiving unit 36 that receives the L information; an HTML information editing unit 37 that refers to the inaccessible list and the user terminal information and edits the HTML information by adding additional information as necessary; and an additional unit that stores the additional information. Information storage unit 3
8 and H for transmitting the edited HTML information to the user terminal.
It is configured by a TML information transmitting unit 39.

The request receiving section 31 is a section for receiving a request from a user. Information on the user terminal is temporarily stored in a user terminal information storage section 34, and the other information is passed to a request permission / inhibition determining section 32. The request permission / non-permission determining unit 32 includes an access denial list storage unit 35.
In the case where the request is rejected as a result, the HTML editing unit 37 is notified, and an HTML including a result returning an error is created.
When the request is accepted, the request is notified to the request transmitting unit 33, and the request is transmitted to the target access destination.

The HTML information receiving section 36 is a section for receiving HTML information from a target access destination, and passes the received HTML information to an HTML information editing section 37. HTM
The L information editing unit 37 refers to the access denial list 35 and the user terminal information 34, and adds the additional information 3 as necessary.
8 to edit the HTML information. Edited HTML
The information is passed to the HTML information transmitting unit 39 and transmitted to the user terminal.

Next, the operation of the proxy server of the present invention will be described with reference to FIGS. When receiving the request from the user terminal 5, the request receiving unit 31 temporarily stores the user terminal information included in the request in the user terminal information storage unit 34. This user terminal information is
In addition to receiving the request simultaneously with the request from the user terminal 5, it may be set in advance by a network administrator or a user.

The request receiving section 31 passes the contents of the request to the request permission determining section 32, extracts the access destination included in the user request, and refers to the access denial list in the access denial list storage section 35.
The access denied list contains the IP address, domain name, U
Different descriptions such as RL are possible, and information indicating the mutual relationship may be provided in an external server in addition to being provided in the proxy server. The search may be either partial match or exact match.

If the user's request destination is included in the access denial list, the request permission / inhibition decision unit 32
This is notified to the TML information editor 37. The HTML information editing unit 37 creates an access error result, passes it to the HTML information transmission unit 39, and returns an inaccessible result to the user.

If the user's request destination is not included in the access denial list, the user request information is transmitted from the request transmission unit 33 to the target access destination.
The response information from the access destination to the transmitted request is received by the HTML information receiving unit 36.

The received HTML information is passed to an HTML information editing unit 37, and the HTML information editing unit 37
The user terminal information and the inaccessible list are referred to,
Further, HTML information to be transmitted to the user terminal 5 is edited in advance according to an instruction from a network administrator or a user. Editing of the HTML information includes deletion of a link destination description included in the inaccessible list, deletion of a script description that cannot be processed by the requesting user terminal 5, addition of additional information 38, and the like.

Specifically, the description including the inaccessible list is deleted when the portion described as the link destination in the received HTML information is included in the inaccessible list, as the link destination. Erase the described portion. In addition, the script description that cannot be processed by the user terminal 5 is deleted by obtaining HTML version information that can be processed by the user terminal 5 from the user terminal information and script information that can be processed, and the user terminal 5 cannot process from the received HTML information. Erase the part. Further, as the additional information 38, for example, an advertisement or the like by an Internet service provider is assumed.

Further, when the proxy server of the present invention has a cache function, the HTML information editing unit 3
Reference numeral 7 has a function of changing the display of the portion indicating the link destination and deleting the comment description portion when the link destination is cached. The edited HTML information is sent to the HTML information transmitting unit 39, and the user terminal 5
Sent to.

[0020]

When the proxy server of the present invention is installed in an Internet service provider, information such as an advertisement can be added to the HTML file received by the user. This information is described in HTML and can be displayed by a general-purpose browser. As a result, the Internet service provider can expect a profit from the advertisement fee. Also, it is not necessary for the user to install a special dedicated browser, and a familiar browser can be used, so that it can be easily introduced.

When the proxy server of the present invention is installed in a company or university, the network administrator registers in advance a home page containing information that the user does not want to display, and rejects the user's request. In the HTML received by the user, the link destination corresponding to the access prohibition can be deleted and provided to the user, so that access to a homepage that the user does not want to be displayed can be suppressed, and unnecessary access can be prevented. It is possible to reduce the communication cost and to reduce the communication cost when a contract is made with the carrier for charging the amount of information. In particular, the method of erasing the access-prohibited link destination has a great effect because the user does not notice the existence of the access-prohibited homepage itself.

Further, the proxy server of the present invention can delete in advance unnecessary comments and portions that cannot be processed by the user's browser. This makes it possible to complement a dial-up environment with a low line speed and speed up the display of the browser. Also, by displaying the information cached on the proxy server, it is possible to know that the target link destination can be displayed quickly even if the backbone capacity is small or the line is congested.

[0023]

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a network showing an embodiment of the present invention.

FIG. 2 is a block diagram showing a proxy server of the present invention.

FIG. 3 is a conceptual diagram of a conventional network.

FIG. 4 is another conceptual diagram of a conventional network.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 HTTP server 2 Internet 3 Proxy server 4 LAN or dial-up 5 User terminal (general-purpose browser) 31 Request receiving unit 32 Request permission determining unit 33 Request transmitting unit 34 User terminal information storing unit 35 Access refusal list storing unit 36 HTML information receiving unit 37 HTML information editing unit 38 Additional information storage unit 39 HTML information transmission unit

Claims (7)

[Claims] A request receiving unit that receives a request from a user; a request permission determining unit that determines whether a request from the user is permitted with reference to an access denied list; and transmits a request from the user to a server. A request transmission unit, a user terminal information storage unit for temporarily storing information about the user terminal, an access denial list storage unit for storing an access denial list for prohibiting user access, and receiving information transmitted from the server. An information editing unit that edits the received information with reference to the access denial list and the user terminal information, and an information transmission unit that transmits the edited information to the user terminal. A proxy server. 2. The proxy server includes an additional information storage unit that stores additional information, and the information editing unit includes:
2. The proxy server according to claim 1, wherein the information to be transmitted to the user terminal is edited by adding the additional information stored in the additional information storage unit. 3. The proxy server according to claim 1, wherein the information editing unit has a function of deleting and editing a link destination description included in the inaccessible list. 4. The proxy server according to claim 1, wherein the information editing unit has a function of deleting and editing a script that cannot be processed by the user terminal. 5. The editing unit has a function of changing a display of a portion indicating the link destination and deleting a comment description portion when the link destination is cached. The proxy server according to claim 1. 6. The information transmitted from the server is HT
The proxy server according to claim 1, wherein the proxy server is ML information. 7. The proxy server according to claim 2, wherein the additional information includes an advertisement by an Internet service provider.