JP2009031852A - Relay device, relay method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology for carrying out processing to a content already received by the terminal even when there is not any operation input in a terminal. <P>SOLUTION: In relaying an HTML file transmitted by a server 110, a relay device 200 inserts a script Sc including a virtual file name and a request cyclic time into the HTML file, and transmits it to a terminal 310. The terminal 310 reads the script Sc from the HTML file, and when an elapsed time since the HTML file has been received exceeds a request cyclic time, the terminal 310 outputs an http request requesting an advertisement file to the relay device 200. The relay device 200 transmits an advertisement file to the terminal 310 as a reply in response to the http request. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to communication technology.

  As a technology for inserting information into content displayed on a Web browser or the like, there is a technology for dynamically editing an HTML (HyperText Markup Language) file on an HTTP (HyperText Transfer Protocol) server. Technology has also been developed in which a relay device inserts information into the content to be transmitted and transmits it to the client. For example, Patent Document 1 discloses a technique for arranging a proxy server in a network and performing information editing or access management. With such a proxy server, it is possible to determine whether or not a user can request, or to add an advertisement to an HTML file sent from an http server.

Japanese Patent Laid-Open No. 11-242639

  However, in the technique of Patent Publication 1, since the proxy server inserts only static information such as an image file into the content, the content once inserted is updated on the web page on the terminal. Unless changed, there was no change.

  The present invention has been made in view of such a background, and an object of the present invention is to provide a technology that enables processing for content that has already been received by the terminal without any operation input in the terminal. is there.

  In order to solve the above-described problem, a relay device according to the present invention is a relay device that relays information transmitted and received between a terminal and a server, and a predetermined transmission condition is described and read into the terminal. And inserting the file in which the transmission condition is set in the terminal into the information transmitted from the server, and transmitting the information transmitted from the terminal, Is a data request transmitted according to the transmission condition, a transmission means for transmitting predetermined data to the terminal.

  Preferably, the insertion unit includes a determination unit that analyzes information transmitted from the server and determines whether to insert the file into the information according to an analysis result. When it is determined to insert, the file may be inserted into the information.

  Preferably, the predetermined data is arranged at a plurality of addresses, and each time the transmitting unit transmits the predetermined data to the terminal, data at an address different from the previous one from the plurality of addresses. Select and send.

  Preferably, the predetermined data is arranged at a plurality of addresses, and the transmission means analyzes information transmitted from the terminal, and the information is a data request transmitted according to the transmission condition. Further includes a counting means for counting this, and a number storage means for storing the count result of the counting means, and selecting and transmitting data at an address corresponding to the count result stored in the number storage means Good.

  Preferably, the predetermined data is arranged at a plurality of addresses, and the transmission means further comprises capacity observation means for observing the capacity of the communication line, and the capacity of the communication line observed by the capacity observation means. It is advisable to select and send data at an address corresponding to the above.

  In addition, it is preferable to further include data storage means for storing the predetermined data at a plurality of addresses.

  In the above aspect, the transmission condition includes a numerical value to be compared with time data indicating time measured by the terminal, and when the comparison between the numerical value and the time data is in a predetermined state, It is desirable that the conditions be described so as to cause the terminal to transmit the data request.

  Preferably, the file includes a second transmission condition, and the rewrite file that causes the terminal to rewrite the predetermined transmission condition set in the terminal is the second transmission condition. Transmission condition rewriting means for transmitting to the terminal may be provided.

  Preferably, the apparatus further includes a combination storage unit that stores a combination of the predetermined data and the rewrite file in advance, and the transmission condition rewriting unit is configured to transmit the predetermined data when the transmission unit transmits the predetermined data. A corresponding rewrite file may be transmitted with reference to the combination storage means.

  Preferably, the insertion means includes second determination means for analyzing the information transmitted from the server and determining whether or not to delete a part of the information according to the analysis result. 2 When the determination means determines to delete, a part of the information may be deleted.

  The relay method according to the present invention is a relay method for relaying information transmitted and received between a terminal and a server, in which a predetermined transmission condition is described and read into the terminal so that the transmission condition is The file set in the terminal is inserted into the information transmitted from the server, the insertion process of transmitting to the terminal, the information transmitted from the terminal is analyzed, and the information is transmitted according to the transmission condition. A transmission process for transmitting predetermined data to the terminal in the case of the received data request.

  In addition, the program according to the present invention allows a computer provided in a relay device that relays information transmitted and received between a terminal and a server to be described in the transmission condition by describing a predetermined transmission condition and reading the computer into the terminal. Inserts the file set in the terminal into the information transmitted from the server, analyzes the information transmitted from the terminal, and the insertion means for transmitting the information to the terminal. In the case of the data request transmitted by, the program is made to function as a transmission means for transmitting predetermined data to the terminal.

  According to the present invention, there is an effect that a relay apparatus arranged in a network can process a content already received by the terminal even if there is no operation input at the terminal.

(A-1: Overall configuration of advertising system)
FIG. 1 is a diagram showing an overall configuration of an advertising system using a relay device according to an embodiment of the present invention. Reference numeral 100 denotes a WAN (Wide Area Network) configured by a communication network laid over a wide area, for example, the Internet. Reference numeral 110 denotes one of servers connected to the WAN 100. The server 110 has a function of receiving an http request via the WAN 100, generating an HTML file according to a URI (Uniform Resource Identifier) included in the http request, and transmitting an http response including the HTML file. There are various types of such servers. In the present embodiment, a case where the server 110 is a search server will be described. More specifically, the server 110 periodically acquires an HTML file via the WAN 100 and analyzes the contents thereof to automatically store the correspondence between the character string included in the acquired HTML file and its URI. It has become. Then, by referring to this database based on the search character string received by the http request, an HTML file in which a list of URIs related to the search character string is described is generated, and an http response including the HTML file is transmitted. . In the description of the present embodiment, descriptions of devices other than the server 110 connected to the WAN 100 are omitted.

  Reference numeral 300 denotes a LAN (Local Area Network) configured by a communication network laid in a limited facility such as an Internet cafe or a hotel. The LAN 300 accommodates terminals such as one or a plurality of personal computers used in the facility. 310 is one of these terminals. The terminal 310 and other terminals connected to the LAN 300 include an arithmetic device such as a CPU (Central Processing Unit), a storage device such as a ROM (Read Only Memory), a RAM (Random Access Memory), and an HDD (Hard Disk Drive). And a basic OS (Operating System) capable of communicating according to a predetermined communication protocol (“IP (Internet Protocol)” in the present embodiment) is running. In addition, a WEB browser operates on this basic OS. Communication according to http is performed by this WEB browser, and a script Sc described in a script language such as ECMAScript operates. Further, the arithmetic device of the terminal 310 has a built-in timer, and the WEB browser refers to time data indicating the time output by the timer via the basic OS. In the description of the present embodiment, descriptions of terminals other than the terminal 310 connected to the LAN 300 are omitted.

  Reference numeral 200 denotes a relay device installed in the facility where the LAN 300 is laid. The relay device 200 receives a packet Pa transmitted from the WAN 100 or the LAN 300 according to a predetermined communication protocol, and corresponds to the destination and data content of the packet Pa. The processing is performed. Hereinafter, the configuration and operation of the relay apparatus 200 that clearly show the features of the present invention will be mainly described.

(A-2: Configuration of relay apparatus 200)
FIG. 2 is a diagram illustrating a hardware configuration of the relay apparatus 200. As shown in FIG. 2, the relay device 200 includes a control unit 210, a first communication interface (hereinafter “IF”) unit 230, a second communication IF unit 240, a storage unit 250, and between these components. It has a bus 260 that mediates data exchange.

  The control unit 210 is, for example, a CPU, executes a program stored in a storage unit 250 described later, and controls other components. The control unit 210 performs a notification operation according to ICMP (Internet Control Message Protocol) when any failure occurs in the communication path, but the description is omitted here.

  Both the first communication IF unit 230 and the second communication IF unit 240 are NICs (Network Interface Cards), and are connected to different communication networks. Specifically, the first communication IF unit 230 is connected to the WAN 100, and the second communication IF unit 240 is connected to the LAN 300. The first communication IF unit 230 and the second communication IF unit 240 receive a packet Pa transmitted via a communication network to which each of the first communication IF unit 230 and the second communication IF unit 240 is connected, and deliver the packet Pa to the control unit 210. The first communication IF unit 230 and the second communication IF unit 240 send the packet Pb delivered from the control unit 210 to the communication network to which each packet Pb is connected.

As illustrated in FIG. 2, the storage unit 250 includes a volatile storage unit 251 and a nonvolatile storage unit 252.
The volatile storage unit 251 is a RAM, and is used as a work area by the control unit 210 operating according to a program. The volatile storage unit 251 stores a packet storage area 2511 and a virtual file table 2512.

  The packet storage area 2511 is a work area for reconstructing the original data Da from the packet Pa. FIG. 3 is a view showing an example of the virtual file table 2512. As shown in FIG. 3, the virtual file table 2512 stores the connection identifier ID, the virtual file name SF, and the advertisement transmission count CNT as a set of records (the connection identifier ID, the virtual file name SF, and the advertisement transmission count CNT. Details will be described later).

  On the other hand, the nonvolatile storage unit 252 includes an EPROM (Erasable Programmable Read Only Memory), a ROM, a hard disk, and the like. The nonvolatile storage unit 252 stores a program for causing the control unit 210 to execute a script insertion operation to be described later, and also stores an advertisement file database 2521 and an advertisement target URI list 2522.

  The advertisement file database 2521 stores advertisement files as a list. Each advertisement file is assigned a continuous file number FN starting from 0, and the advertisement file is specified by this file number FN. For example, when three advertisement files are stored in the advertisement file database 2521, the file numbers FN are three of 0, 1, and 2. In the present embodiment, the advertisement file is an HTML file to which an image including a link to a specific company site is pasted.

  The advertisement target URI list 2522 stores in advance a list of URIs that provide HTML files that are permitted to be inserted into the advertisement file. For example, the host name of the main search site is stored as a URI in this list, and in this embodiment, the host name of the server 110 is included.

Next, a functional configuration of the relay device 200 will be described.
FIG. 4 is a diagram illustrating a functional configuration of the relay device 200. The packet analysis module 2101, the content management module 2102, the advertisement management module 2103, and the script insertion module 2104 shown in the broken line frame are functional blocks realized by the control unit 210. When these functional blocks perform the following operations, the control unit 210 executes a script insertion operation.

The packet analysis module 2101 has the following four functions.
The first function of the packet analysis module 2101 is a function that analyzes an input packet Pa, identifies a connection to which the packet Pa belongs, and generates a connection identifier ID.

  More specifically, the packet analysis module 2101 determines whether or not the packet Pa is a connection establishment request. In this embodiment, when the transport protocol of the packet Pa is TCP (Transmission Control Protocol) and the predetermined code bit indicates a specific value, it is determined that the packet Pa is a connection establishment request. To do. When it is determined that the packet Pa is a connection establishment request, the packet analysis module 2101 extracts the start point IP address and the end point IP address from the IP header of the packet Pa, and extracts the start point port number and the end point port number from the TCP header. . Then, from these extracted values, a character string uniquely determined for this connection is generated as a connection identifier ID.

  The second function of the packet analysis module 2101 is a data reconstruction function for storing the packet Pa sent under each connection in the packet storage area 2511 for each connection and reconstructing the original data Da from the packet Pa. is there. When the reconstruction of the data Da is completed, the packet analysis module 2101 stores the data Da in the packet storage area 2511 and releases the storage area of the packet storage area 2511 in which the original packet Pa is stored.

  A third function of the packet analysis module 2101 is a data extraction function that extracts a part from the reconstructed data Da and delivers it to the content management module 2102. More specifically, the packet analysis module 2101 extracts a URI (hereinafter referred to as a request URI) indicated by an http request transmitted from the LAN 300 side to the WAN 100 side from the reconstructed data Da. Then, the request URI and the connection identifier ID indicating the connection used for transmitting the http request are delivered to the content management module 2102 as a pair.

  The fourth function of the packet analysis module 2101 is a function of delivering the reconstructed data Da to the script insertion module 2104 together with the connection identifier ID, start point IP address, end point IP address, start point port number, and end point port number. .

The content management module 2102 has the following three functions.
The first function of the content management module 2102 is a determination function for determining whether to insert a script Sc and transmit an advertisement file based on the request URI delivered from the packet analysis module 2101.

  More specifically, the content management module 2102 determines whether or not the requested URI matches any of the URIs stored in advance in the advertisement target URI list 2522. It is decided to insert a predetermined script Sc into the requested HTML file. Here, the term “match” includes not only complete match but also partial match. For example, the content management module 2102 extracts the host name from the request URI, searches the advertisement target URI list 2522, and determines that the script Sc is inserted into the HTML file when a URI including the host name is found. .

  Further, when the above request URI indicates a file name, the content management module 2102 searches the virtual file table 2512 for a record including the file name as the virtual file name SF. When the above record is found, it is determined that the advertisement file is transmitted as a response to the request URI. Then, after passing the connection identifier ID and advertisement transmission count CNT described in the found record to the advertisement management module 2103, 1 is added (incremented) to the advertisement transmission count CNT, and this value is overwritten on the record. To do.

  The second function of the content management module 2102 is a function for generating a virtual file name SF based on the connection identifier ID delivered together with the request URI when the above-described script Sc is determined to be inserted. Then, the content management module 2102 creates a record in which 0 is written as the connection identifier ID, virtual file name SF, and advertisement transmission count CNT, and adds this record to the virtual file table 2512.

  A third function of the content management module 2102 is a function for instructing the script insertion module 2104. Specifically, when the content management module 2102 determines to insert the script Sc using the determination function, the content management module 2102 sends the connection identifier ID to the script insertion module 2104 and instructs “insert script Sc”. Further, when it is determined to transmit the advertisement file, the script identifier module 2104 is transmitted with the connection identifier ID and the file number FN sent from the advertisement management module 2103 by the process described later, and instructed to “send advertisement file”. .

  The function that the advertisement management module 2103 is responsible for is a file number calculation function for calculating the file number FN of the advertisement file to be transmitted.

  More specifically, when receiving the connection identifier ID and the advertisement transmission count CNT from the content management module 2102, the advertisement management module 2103 divides the advertisement transmission count CNT by the number of advertisement files stored in the advertisement file database 2521. The remainder is calculated as the file number FN. Then, the calculated file number FN is sent to the content management module 2102 together with the above-described connection identifier ID.

  For example, when the number of advertisement files is 3, when the advertisement management module 2103 first receives the advertisement transmission count CNT for the connection, the “advertisement transmission count CNT” is 0, and the remainder of the division is 0. It is. Therefore, in this case, the advertisement file is specified by the file number “0”. When the number of advertisement files is 3 and the “advertisement transmission count CNT” is 4, the remainder is 1, so the advertisement file is specified by the file number “1”.

The script insertion module 2104 has the following three functions.
The first function of the script insertion module 2104 is a function for inserting the script Sc into the HTML file.

  More specifically, when there is an instruction “insert script Sc” from the content management module 2102, the script insertion module 2104 identifies an http response by the connection identifier ID sent together with the instruction, and is included in this The HTML file is analyzed to determine a position suitable for insertion of the script Sc, such as immediately after a predetermined HTML tag. Then, a script Sc for causing the Web browser to periodically request the advertisement file is created and inserted into the above-described position in the HTML file to generate a modified HTML file. Although it takes time from the time when the relay apparatus 200 transmits an http request until it receives an http response to this, the reply is sent through the same connection as the http request by using the connection identifier ID in this way. Specified http responses can be identified.

The second function of the script insertion module 2104 is a function of reading an advertisement file by the file number FN.
Specifically, when there is an instruction “send advertisement file” from the content management module 2102, the script insertion module 2104 reads the advertisement file from the advertisement file database 2521 by the file number FN sent together with the instruction. Then, the http request that requested the advertisement file is specified by the connection identifier ID sent together with the instruction, and this is discarded.

  The third function of the script insertion module 2104 is a function of dividing the advertisement file, the modified HTML file, and other reconstructed data Da into a predetermined size, attaching a header, and transmitting the packet Pb. However, only when the advertisement file is transmitted, the header is adjusted so that transmission is performed toward the transmission source that requested the advertisement file. For other transmissions, the header is adjusted so that the packet is transmitted to the same destination through the same connection as the original packet Pa. Such header adjustment is performed by referring to the start point IP address, end point IP address, start point port number, and end point port number delivered from the packet analysis module 2101.

(B: Operation of relay device 200)
Next, the operation of the relay apparatus 200 according to the present invention will be described.
FIG. 5 is a sequence diagram illustrating an operation of communication performed by the terminal 310 and the server 110 via the relay device 200. A web browser is running on the terminal 310. Upon receiving an operation by the user, the web browser generates an http request for requesting an HTML file from the server 110 (step S1). This http request is divided into packets Pa by the basic OS of the terminal 310, and is transmitted to the relay device 200 via the LAN 300 (step S2).

  When the relay device 200 receives the packet Pa, the packet analysis module 2101 analyzes the packet Pa (step S3). Here, the above-mentioned http request is a request sent to the server 110 for the first time, and the packet Pa includes a connection establishment request. Therefore, the packet analysis module 2101 generates a connection identifier ID. Hereinafter, a case where the connection identifier ID generated by the packet analysis module 2101 is “1bde5f7d” will be described as an example.

  The packet analysis module 2101 reconstructs the original data Da from the packet Pa, and delivers it to the script insertion module 2104 together with the connection identifier ID “1bde5f7d”, the start point IP address, the end point IP address, the start point port number, and the end point port number. In addition, the request URI included in the http request among the data Da is delivered to the content management module 2102. Based on the request URI, the content management module 2102 determines whether to insert an advertisement into the HTML file sent as a response to the http request.

  Here, the host name of the server 110 is described in the request URI, and the host name of the server 110 is stored in the advertisement target URI list 2522 as a URI permitted to insert an advertisement file. Therefore, the content management module 2102 determines to insert an advertisement into the HTML file, and generates the virtual file name SF “File-1bde5f7d” based on the connection identifier ID “1bde5f7d”. Then, the content management module 2102 creates a record in which 0 is written as the connection identifier ID “1bde5f7d”, the virtual file name SF “File-1bde5f7d”, and the advertisement transmission count CNT, and this record is added to the virtual file table 2512. .

  Then, the http request is again divided into a predetermined size by the script insertion module 2104 and sent to the server 110 as a packet Pb with a predetermined header (step S4). In response to this, the server 110 transmits an HTML file to the terminal 310 (step S5).

  The HTML file transmitted by the server 110 is received by the relay apparatus 200 as a packet Pa, and the packet analysis module 2101 reconstructs the original HTML file and sends it to the script insertion module 2104. The script insertion module 2104 analyzes the reconstructed HTML file, and inserts the script Sc in which the virtual file name SF “File-1bde5f7d” and a predetermined request cycle time are described at a predetermined position, and the corrected HTML file is inserted. It is generated (step S6), divided into packets Pb, and sent to the terminal 310 (step S7).

  Upon receiving this packet Pb, the Web browser of the terminal 310 reconstructs the modified HTML file that is the original data from the packet Pb, reads the script Sc inserted by the script insertion module 2104 out of the modified HTML file, and activates it. (Step S8). Content other than the script Sc is interpreted by a normal function of the Web browser and displayed in the window. FIG. 6 is a display example of a modified HTML file by a Web browser. As illustrated in FIG. 6, when the Web browser starts the script Sc, the advertising space R is secured on the right side of the window, and when the Web browser receives the advertising file, the image indicated by the image data is displayed as the advertising space. Display in R.

  By executing the script Sc, the Web browser of the terminal 310 refers to time data indicating the time output by the timer via the basic OS, and starts measuring the elapsed time from when the modified HTML file is received. Then, the Web browser compares the elapsed time with the request cycle time described in the script Sc (step S9), and if the elapsed time exceeds the request cycle time, the advertisement file is transmitted via the connection that has received the modified HTML file. The http request for requesting is divided into packets Pa and output (step S10). Here, the request URI of the http request includes the virtual file name SF “File-1bde5f7d” as the requested file name.

  When the relay apparatus 200 receives this packet Pa, the packet analysis module 2101 analyzes this packet (step S11). Since this packet is not a connection establishment request, the packet analysis module 2101 does not generate a connection identifier ID that is used when establishing a connection, but reconstructs the original http request from the received packet and manages the request URI contained therein in the content management Send to module 2102.

  The content management module 2102 searches the virtual file table 2512 for a record including the file name “File-1bde5f7d” described in the request URI as the virtual file name SF. Here, since the record including the file name “File-1bde5f7d” as the virtual file name SF has already been added to the virtual file table 2512, the record is found, and the content management module 2102 receives the advertisement file as a response to the request URI. Is determined to be sent. Then, the content management module 2102 delivers the connection identifier ID and the advertisement transmission count CNT described in the record to the advertisement management module 2103, and then increments the advertisement transmission count CNT. The advertisement management module 2103 calculates the file number FN of the advertisement file to be transmitted from the advertisement transmission count CNT, and sends it to the content management module 2102 together with the above-described connection identifier ID. The content management module 2102 sends these to the script insertion module 2104. And send the advertisement file. In response to this instruction, the script insertion module 2104 uses the sent connection identifier ID, so that the request URI includes the virtual file name SF “File-1bde5f7d”, that is, the http requesting the advertisement file. Identify the request and discard it. As a result, the http request is not transmitted from the relay apparatus 200 to the WAN 100 side. Then, the script insertion module 2104 reads the advertisement file from the advertisement file database 2521 based on the file number FN, divides it, generates a packet Pb, and returns it to the terminal 310 (step S12).

  The terminal 310 reconstructs the returned packet Pb, and the Web browser displays the reconstructed advertisement file as a still image in the advertisement space R on the screen and newly starts measuring elapsed time. (Step S13).

  After this, since the processing from step S9 to step S13 is repeated, the same processing as described above is performed. However, since the “advertisement transmission count CNT” is increased by the increment processing every time the processing is circulated, Change. For example, when the content management module 2102 delivers the advertisement transmission count CNT to the advertisement management module 2103 for the second time, the “advertisement transmission count CNT” is “1”, so the remainder number is also 1. Therefore, since the advertisement file indicated by the file number “1” is returned to the terminal 310, the Web browser of the terminal 310 displays the advertisement file having the file number “1” in the advertisement frame R on the screen.

  In this way, even if no operation input is performed at the terminal 310, the relay device 200 can circularly execute the advertisement file stored in the advertisement file database 2521 by executing the script Sc by the Web browser. The advertisement file is periodically displayed on the screen of the terminal 310. In addition, an http request periodically transmitted by the execution of the script Sc is detected by collation of the virtual file name and discarded without being transmitted to the WAN 100 side.

  Since the advertisement file displayed as a still image on the screen includes a link to a specific company site, when the user operates the mouse or the like and clicks on the still image, the web browser Generate an http request based on the link. Since the virtual file name is not used in the request URI described in the http request, the request is transmitted to the company site without being discarded by the relay apparatus 200. Therefore, the user can obtain information provided by the company site.

(C: Modification)
As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, It can implement with another various form. An example is shown below. In addition, you may combine each following aspect suitably.

(1) In the above-described embodiment, the advertisement file is a still image, but the advertisement file is not limited to this. For example, it may be a moving image, a character string, audio, or the like, or dynamic content such as a script.

(2) In the above-described embodiment, the relay device 200 transmits the advertisement file regardless of the size of the communication line capacity (here, the amount of information that can be transmitted per unit time). The type of advertisement file to be transmitted may be selected according to the size of the file. In this case, one or more threshold values for dividing the communication line capacity into a plurality of groups and a table showing the correspondence between each group and the type of advertisement file are stored in the nonvolatile storage unit 252, and the control unit 210 The type of advertisement file to be transmitted may be selected by comparing the observed communication line capacity with the above threshold. The file type is not limited to a file format such as a moving image, a still image, or a character string, and different file types are used as long as the sizes are different even if the file format is the same.

(3) In the above-described embodiment, the relay device 200 inserts the script Sc into the HTML file sent from the server 110. However, other processing may be performed simultaneously with the insertion of the script Sc. For example, if an HTML file already sent from the server 110 contains advertisements or scripts, these may be detected and removed. In this case, a list of tags of content to be removed is stored in the nonvolatile storage unit 252 and the content to be removed is detected based on the list when analyzing the HTML file. do it. In addition, the script Sc may be inserted at a position where the removed content was present. That is, content replacement may be performed.

(4) In the above-described embodiment, there is only one window of the Web browser, and the still image of the advertisement file is the advertisement frame R (FIG. 6) secured in the same window as the other contents of the modified HTML file. These display destinations are not limited to the same window. For example, as shown in FIG. 7, a window different from the window for displaying content other than the advertisement may be created, and the advertisement file image may be displayed therein.

(5) In the above-described embodiment, the advertisement transmission count CNT is processed by the relay device 200. However, the advertisement transmission count CNT may be processed by the terminal 310. For example, the advertisement transmission count CNT stored in the RAM of the terminal 310 may be incremented each time the Web browser executes the script Sc and outputs an http request. Further, since the script Sc is stored in the RAM of the terminal 310, a sequence number is added to the end of the virtual file name described therein, and the advertisement transmission count CNT can be expressed by rewriting the sequence number. Good. Specifically, when the advertisement transmission count CNT is 3, the virtual file name and the advertisement transmission count CNT may be expressed in the script Sc by setting the virtual file name to “File-1bde5f7d-003”. . In this case, the virtual file table 2512 does not need the field of the advertisement transmission count CNT. When the content management module 2102 determines whether the advertisement file can be transmitted, the virtual file table 2512 includes a sequence of the virtual file names. What is necessary is just to make the part except a number into a comparison object.

(6) In the above-described embodiment, the request cycle time is not rewritten in the terminal 310, but the relay apparatus 200 transmits a rewrite file describing the new request cycle time, and sends the request cycle to the terminal 310. The time may be rewritten. In this case, the advertisement file database 2521 may store a rewrite file for each advertisement file. The new request cycle time described in the rewrite file may be a uniform value for all advertisement files or may be different for each advertisement file. Further, the script insertion module 2104 transmits the advertisement file and the request cycle time of the advertisement file as a pair, and the Web browser that has received this sends the elapsed time from the moment when the advertisement file is received and the request cycle time. By comparing, the next timing for requesting the advertisement file may be determined. In this way, since the request cycle time can be set for each advertisement file, the advertisement fee for each advertisement file can be set flexibly, for example, the advertisement fee is set higher for an advertisement file having a longer request cycle time.

(7) In the above-described embodiment, the relay apparatus 200 reconstructs all the packets Pa regardless of the contents of the data Da. However, only a part of the packets Pa may be reconstructed. For example, if it is found that the data is not described according to http during the reconstruction, or if it is found that the packet Pa is described according to a transport protocol other than TCP, the reconstruction is stopped at that point. May be. Then, the relay device 200 stores the canceled reconstructed original packet Pa as it is to the transmission destination described in the header, and then stores the reconstructed data and the already transmitted packet Pa. You just need to free up space.

(8) In the above-described embodiment, the advertisement file database 2512 is stored in the non-volatile storage unit 252 of the relay device 200. However, the advertisement file is stored in the external storage device, and the first communication IF unit 230 and the first communication The advertisement file may be read via the two-communication IF unit 240. In this case, the storage unit 250 stores the URI of the advertisement file, and the relay apparatus 200 may read the advertisement file with reference to this URI. That is, the relay apparatus 200 stores an address indicating the area of the storage unit 250 and an address such as a URI indicating the area of the external storage apparatus, and reads the advertisement file based on the address. Note that there may be one or more such external storage devices.

  Further, the advertisement file may be periodically transmitted from the external storage device to the relay device 200, and the relay device 200 may store the advertisement file database 2512 with a file number assigned to the transmitted advertisement file.

  Further, the external storage device may detect the installation location where each of the plurality of relay devices 200 is installed, and change the advertisement file transmitted to each relay device 200 for each installation location. In this case, the external storage device may store the correspondence between the character string indicating the installation location and the advertisement file in advance. In this way, an advertisement for a store in the vicinity of the facility where the terminal 310 is installed can be displayed on the screen of the terminal 310, so that a more effective advertisement can be displayed. There are various methods for the external storage device to detect the installation location of each relay device 200. For example, the external storage device stores in advance a pair of a character string indicating the installation location of the IP address of the relay device 200 in the table. You may keep it.

(9) In the above-described embodiment, the content management module 2102 determines whether to insert the script Sc and transmit the advertisement file based on the request URI. The search character string to be sought may be monitored, and this determination may be made based on this. In this case, the packet analysis module 2101 may extract the search character string from the http request and deliver it to the content management module 2102.

(10) The advertisement file to be inserted may be determined according to the contents of the search character string. In this case, the control unit 210 that stores the advertisement file and the keyword related to the advertisement file in the advertisement file database 2521 as a pair and obtains the search character string from the http request collates the search character string with the keyword. Thus, the advertisement file to be inserted may be determined.

(11) In the above-described embodiment, the advertisement transmission count CNT is used to specify the file number FN as the address of the advertisement file. However, it may not be used. For example, the file number FN of the advertisement file transmitted to the terminal 310 is stored in the volatile storage unit 251, and a plurality of file numbers excluding the stored previous file number FN when the file number FN is newly determined. What is necessary is just to select one from FN. For this selection, for example, a random number may be used. In this case, the random numbers may be generated uniformly in all the file numbers FN, but may be multiplied by a predetermined weight coefficient. Further, such a weight coefficient may be stored in a predetermined area of the nonvolatile storage unit 252 for each file number FN. In short, every time data (advertisement file etc.) is sent to the terminal 310, it is possible to select and send data from a plurality of addresses (file number FN etc.) different from the previous one. It is only necessary that the device 200 can identify the address.

(12) The relay apparatus 200 according to the present invention can be composed of various devices. For example, the relay device 200 may be configured by providing the router with the functions described above.

It is a figure showing the whole advertising system composition using a relay device which is one embodiment of this invention. 2 is a diagram illustrating a hardware configuration of a relay device 200. FIG. 6 is a diagram showing an example of a virtual file table 2512. FIG. 3 is a diagram illustrating a functional configuration of a relay device 200. FIG. FIG. 6 is a sequence diagram illustrating an operation of communication performed by the terminal 310 and the server 110 via the relay device 200. It is an example of a display of the correction | amendment HTML file by a web browser. It is the example of a display of the advertisement by the web browser which opened two windows.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... WAN, 200 ... Relay apparatus, 210 ... Control part, 2101 ... Packet analysis module, 2102 ... Content management module, 2103 ... Advertisement management module, 2104 ... Script insertion module, 230 ... 1st communication IF part, 240 ... 2nd Communication IF unit, 250 ... storage unit, 251 ... volatile storage unit, 2511 ... packet storage area, 2512 ... virtual file table, 252 ... non-volatile storage unit, 2521 ... advertisement file database, 2522 ... advertisement target URI list, 260 ... Bus, 300 ... LAN, 310 ... terminal

Claims (12)

A relay device that relays information transmitted and received between a terminal and a server,
Inserting means for inserting a file in which a predetermined transmission condition is described and read into the terminal so that the transmission condition is set in the terminal is inserted into information transmitted from the server and transmitted to the terminal ,
Analyzing the information transmitted from the terminal, and when the information is a data request transmitted according to the transmission condition, transmitting means for transmitting predetermined data to the terminal;
A relay apparatus comprising: The inserting means comprises analyzing means for analyzing information transmitted from the server, and determining whether or not to insert the file into the information according to the analysis result. The relay apparatus according to claim 1, wherein the file is inserted into the information when the information is received. The predetermined data is arranged at a plurality of addresses,
3. The transmission unit according to claim 1, wherein the transmission unit selects and transmits data having an address different from the previous one from the plurality of addresses each time predetermined data is transmitted to the terminal. Relay device. The predetermined data is arranged at a plurality of addresses,
The transmitting means analyzes information transmitted from the terminal, and stores the counting result when the information is a data request transmitted according to the transmission condition, and the counting result of the counting means. The relay apparatus according to claim 1, further comprising a number storage unit, and selecting and transmitting data at an address corresponding to a count result stored in the number storage unit. The predetermined data is arranged at a plurality of addresses,
The transmission means further comprises capacity observation means for observing the capacity of a communication line, and selects and transmits data at an address corresponding to the capacity of the communication line observed by the capacity observation means. 3. The relay device according to 1 or 2. 6. The relay apparatus according to claim 3, further comprising data storage means for storing the predetermined data at a plurality of addresses. The transmission condition includes a numerical value to be compared with time data indicating time measured by the terminal, and transmits the data request to the terminal when the comparison between the numerical value and the time data is in a predetermined state. The relay device according to any one of claims 1 to 6, wherein the conditions are described so as to be performed. A transmission that includes a second transmission condition, and that transmits a rewrite file to be rewritten by the terminal so that the predetermined transmission condition set in the terminal is the second transmission condition. The relay device according to claim 1, further comprising a condition rewriting unit. A combination storage means for storing a combination of the predetermined data and the rewrite file in advance;
The relay apparatus according to claim 8, wherein the transmission condition rewriting unit transmits a corresponding rewriting file with reference to the combination storage unit when the transmission unit transmits the predetermined data. The insertion means includes second determination means for analyzing information transmitted from the server and determining whether or not to delete a part of the information according to the analysis result, and the second determination means deletes the information. The relay apparatus according to any one of claims 1 to 9, wherein a part of the information is deleted when it is determined. A relay method for relaying information transmitted and received between a terminal and a server,
An insertion process in which a predetermined transmission condition is described and a file in which the transmission condition is set in the terminal by being read by the terminal is inserted into information transmitted from the server and transmitted to the terminal. ,
Analyzing information transmitted from the terminal, if the information is a data request transmitted according to the transmission condition, a transmission process of transmitting predetermined data to the terminal;
The relay method characterized by comprising. A computer provided in a relay device that relays information transmitted and received between the terminal and the server,
Inserting means for inserting a file in which a predetermined transmission condition is described and read into the terminal so that the transmission condition is set in the terminal is inserted into information transmitted from the server and transmitted to the terminal ,
A program for analyzing information transmitted from the terminal and, if the information is a data request transmitted according to the transmission condition, functioning as transmission means for transmitting predetermined data to the terminal.

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