JP4233386B2 - Information resource server and information resource providing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an information resource server capable of obtaining an alternative information resource indicator when an information resource indicator received from a client terminal cannot be accessed.
[0002]
[Prior art]
In recent years, it has become common to use a global network such as the Internet as a medium for collecting and distributing various information. In particular, information providing means called WWW (World Wide Web) is growing rapidly.
[0003]
In the WWW, information resource groups are distributed and shared among users, and by specifying a URL (Uniform Resource Locator) as an indicator, the storage location of the target information resource is specified, and from the specified storage location By acquiring the information resource, the target information resource can be browsed.
[0004]
By the way, the URL that is the information resource indicator on the WWW does not exist permanently. For example, the storage location of the information resource is changed by changing the configuration of the Web site where the information resource is stored or by changing the data server where the information resource is stored. For this reason, there is a problem that the URL is changed and the target information resource cannot be accessed.
[0005]
A homepage address registration device that can easily access the page even when the URL is changed has been proposed (see, for example, Patent Document 1). In this device, homepage search target data is stored in association with the homepage address, and when it is detected that the homepage address does not exist, the homepage search target data is stored in association with the homepage address. Search the home page address. In the invention described in this document, the search target data includes character strings, image data, and graphic data extracted from the corresponding home page.
[0006]
In the described invention, when it is determined that the URL cannot be accessed due to a change in the URL, an alternative home page can be searched from the search target data.
[0007]
Also, in the case of a hyperlink that writes the URL, which is an information resource of another person, in its own information and makes it public on the network, the other person moves or closes his / her site for some reason, or the URL itself When changing the URL, there is a problem that the hyperlinked URL cannot be accessed.
[0008]
[Patent Document 1]
JP 2001-273185 A (Claim 1, paragraphs 0027 to 0028)
[0009]
[Problems to be solved by the invention]
However, the homepage address registration device described in the above document stores necessary search target data from the selected homepage. That is, the operator needs to register in advance a homepage from which access information is to be obtained, select necessary search target data from the homepage, and register it. The user also needs to perform an address update operation as appropriate. For this reason, there exists a problem that a user's burden is large.
[0010]
In addition, when selecting the search target data from the home page, there is a problem that the home page accessed by the alternative home page address is different from the original home page unless appropriate data is selected.
[0011]
Furthermore, URLs hyperlinked in the home page can be registered as search target data in the home page. However, there is a problem that access is not possible when an information resource indicator such as a URL is changed.
[0012]
The present invention has been made in view of the above. The purpose of the present invention is to change the information resource indicator even if the information resource indicator such as the URL is changed, or even if the user does not perform a special operation such as a registration operation. An object is to provide an information resource server from which a resource indicator can be easily obtained.
[0013]
[Means for Solving the Problems]
In order to solve the above problems, the information resource server of the present invention includes a search expression used for an information resource search request from a plurality of client terminals accessing the information resource server, and an information resource instruction specified by the search expression. The child is stored in the information resource server, and the stored data is used to acquire another information resource indicator that replaces the information resource indicator that cannot access the information resource. That is, the present invention is as follows.
[0014]
The information resource server of the present invention is an information resource server connected to a data server for accumulating information resources and a client terminal for searching for information resources via a network, and the search formula received from the client terminal An information resource specifying means for specifying a corresponding information resource in the data server searched based on a storage means for storing the search formula and an information resource indicator for identifying the specified information resource in association with each other; An access determination unit that determines whether the information resource indicated by the information resource indicator received from the client terminal is accessible; and the information resource indicator that is determined to be inaccessible by the access determination unit is stored in the storage unit. Memory determination means for determining whether or not it is stored, and storage Alternative information resource indicator acquisition means for acquiring another information resource indicator specified by the search expression corresponding to the information resource indicator being specified, and transmission for transmitting the acquired other information resource indicator to the client terminal Means.
[0015]
According to this configuration, the information resource server of the present invention specifies the corresponding information resource in the data server searched based on the search formula received from the client terminal, and the search formula and the specified information resource Are stored in association with information resource indicators for identifying. Further, when the information resource indicator designated by the client terminal cannot be accessed, another information resource indicator can be obtained from the stored data using a search result including the information resource indicator. There is no special burden on the person.
[0016]
Such a storage means includes a search result storage table for storing a search expression received from a client terminal and an information resource indicator specified by the search expression in association with a user ID of the client terminal, an information resource instruction A search expression usage count storage table for storing a search expression specifying a child and the number of times the search expression is used to specify an information resource indicator in association with the information resource indicator, and a search expression. The information resource indicator and the number of times the information resource indicator has been selected may be stored as long as the information resource indicator selection number storage table is stored in association with the search formula.
[0017]
In the search result storage table, a search expression associated with the user ID of the client terminal and an information resource indicator specified by the search expression are stored. As a result, search results based on search requests received from a plurality of client terminals accessing the information resource server can be used.
[0018]
The retrieval formula use count storage table stores the search formula used to obtain each information resource indicator and the number of uses thereof. As a result, even when the information resource indicator received from the client terminal cannot be accessed, the retrieval formula used many times to obtain the resource indicator can be found, so another valid information resource indicator is obtained. It becomes easy. In particular, another information resource indicator that can be effectively accessed can be easily obtained from an information resource indicator in which only the information resource indicator is known, as in the case of hyperlinks.
[0019]
In the information resource indicator selection number storage table, the information resource indicator obtained from each search expression and the number of times of actually accessing the information resource indicated by the information resource indicator are stored. As a result, it becomes easy to find another effective information resource indicator from the number of selections of the information resource indicator.
[0020]
The storage means is requested to access the information resource from the client terminal, and when the information resource can actually be accessed, the search expression stored in the search expression use count storage table corresponding to the information resource for which access is requested. Is updated, and the number of selections of the information resource indicator corresponding to the information resource for which access is requested is updated and stored. As a result, as the number of accesses increases, it is considered that the information resource indicator is more likely to be accessed effectively. Therefore, other effective information resources can be easily acquired.
[0021]
Therefore, the alternative information resource indicator acquisition means selects from the list of search formulas corresponding to the information resource indicator determined to be inaccessible in order from the search formula having the highest number of uses, and is searched by the selected search formula. Attempts to obtain other information resource indicators.
[0022]
In the information resource providing method of the present invention, in response to an information resource request from a client terminal received via a network, information corresponding to the information resource is acquired from the data server, and the obtained information resource is transmitted to the client terminal. A resource providing method for identifying a corresponding information resource in a data server searched based on a search expression received from a client terminal, and an information resource indicator for identifying the search expression and the specified information resource Are stored in association with each other, an access determination step for determining whether the information resource indicated by the information resource indicator received from the client terminal is accessible, and the access determination means determines that access is not possible. The information resource indicator is stored in the storage means. A storage determination step for determining whether the information is stored; an alternative information resource indicator acquisition step for acquiring another information resource indicator specified by a search expression corresponding to the stored information resource indicator; and the acquisition A transmission step of transmitting the other information resource indicator to the client terminal.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In addition, this invention is not limited by these. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
[0024]
(Embodiment 1)
FIG. 1 shows a block diagram in which an information resource server of the present invention is connected to a client terminal and a data server via a network. In this figure, reference numeral 10 denotes a client terminal A, a client terminal B, a client terminal C,... (Hereinafter referred to as a client terminal 10) that can be connected to a network 11 such as the Internet and has a browser function. Reference numeral 12 denotes a search result or information resource necessary for the client terminal 10 to access the data server A, the data server B, the data server C,... (Hereinafter referred to as the data server 13) via the network 11. It is an information resource server that transmits an indicator to the client terminal 10.
[0025]
When the client terminal 10 starts up a browser, accesses predetermined information content, and makes a search request, the information resource server 12 transmits a search result or an information resource indicator to the client terminal 10.
[0026]
Next, the internal configuration of the information resource server 12 will be described. Reference numeral 21 denotes a control unit that controls data in the information resource server 12. The storage unit 22 stores a search expression received from the client terminal 10 and an information resource indicator specified by the search expression in association with the user ID of the client terminal, an information resource instruction A search expression use count storage table 22b for storing a search expression specifying a child and the number of times the search expression is used to specify an information resource indicator in association with the information resource indicator, and specifying the search expression And an information resource indicator selection count storage table 22c that stores the information resource indicator and the number of times the information resource indicator has been selected in association with the search formula. The receiving unit 23 receives the search request from the receiving unit 10 via the network 11. When the search request is a search expression, the information resource specifying unit 24 specifies the information resource. As a result, when the information resource indicator is found, the search result received from the client terminal and the information resource indicator specified by the search equation are associated with the user ID of the client terminal and stored as a search result. Store in table 22a. In addition, the search expression use count storage table 22b stores the search formula specifying the information resource indicator and the number of times the search formula is used to specify the information resource indicator in association with each other. The number of times the search expression is used is set to 0 and stored in association with the information resource indicator. The information resource indicator selection number storage table 22c selects the information resource indicator when the information resource indicator specified by the search formula and the number of times the information resource indicator is selected are not stored in association with each other. The number of times is set to 0 and stored in association with the search expression. The identified information resource indicator is transmitted from the transmission unit 28 to the client terminal 10.
[0027]
When the search request is an information resource indicator, the access determination unit 25 determines whether the information resource indicated by the information resource indicator can be accessed. As a result, when the information resource can be accessed, the data obtained from the data server 13 is returned to the client terminal 10. At the same time, the number of times the search expression is used to identify the information resource indicator in the search expression usage count storage table 22b, and the number of times the information resource indicator is selected in the information resource indicator selection count storage table 22c. Is increased by one each. When it is determined that the information resource indicator cannot access the information resource, the storage determination unit 26 determines whether the information resource indicator is stored in the storage unit 22. When the information resource indicator is stored, the alternative information resource acquisition unit 27 acquires another information resource indicator similar to the information resource indicator using a search expression corresponding to the information resource indicator. The The acquired other information resource indicator is transmitted from the transmission unit 28 to the client terminal 10. The user attempts to access the information resource using the other information resource indicator.
[0028]
The network 11 can use various communication lines such as the Internet and wireless data communication. Although not shown, the client terminal 10 is connected to a display device such as a CRT or a liquid crystal display device and an input / output device such as a keyboard or a mouse. The data server 13 is managed by a company, an organization, an individual, etc., is opened on a network, and has a function of transmitting information.
[0029]
Each unit of the information resource server 12 described above may be realized by dedicated hardware, and each unit is configured by a memory and a CPU (central processing unit) to realize the function of each unit. It may be a thing. The memory includes a non-volatile memory such as a hard disk device, a magneto-optical disk device, and a flash memory, a recording medium such as a CD-ROM that can only be read, and a volatile memory such as a RAM (Random Access Memory). Or a computer-readable / writable recording medium based on a combination thereof.
[0030]
Next, each storage table in the storage unit 22 will be described. In the examples of FIGS. 2 to 4, a URL is used as an information resource indicator.
[0031]
FIG. 2 is a diagram showing a storage example of the search result storage table 22a. As shown in FIG. 2, the search result storage table 22a stores a search expression and a search result corresponding to the search expression in association with the user ID of the user who uses the client terminal 10. For example, an IP (Internet Protocol) address may be used as the user ID. In the example of this figure, the search result is a URL.
[0032]
FIG. 3 is a diagram showing a storage example of the search expression usage count storage table 22b. As shown in FIG. 3, a search expression specifying the information resource indicator and the number of times the search expression is used to specify the information resource indicator are stored in association with the information resource indicator. When the information resource server 12 receives the information resource indicator from the client terminal 10 and can access the information resource corresponding to the information resource indicator, the information resource server 12 uses the number of uses of the search expression that searched for the information resource indicator. Increase by one. Specifically, when URL1 is able to access the information resource, the number of uses of search formula 1, search formula 3, and other search formulas searched for URL 1 is increased by one.
[0033]
As described above, when the information resource indicator becomes inaccessible to the information resource by increasing the number of times the search expression used to search for the information resource indicator that can access the information resource is used, the information resource indicator is acquired. A useful search formula can be easily obtained.
[0034]
FIG. 4 is a diagram showing a storage example of the information resource indicator selection count storage table 22c. As shown in FIG. 4, the information resource indicator specified by the search expression and the number of times the information resource indicator is selected are stored in association with the search expression. The information resource server 12 receives the information resource indicator from the client terminal, and when the information resource indicator can access the corresponding information resource, the URL obtained from the search expression that searched for the information resource indicator The number of uses increases by 1. Specifically, when the URL 1 is obtained by the search formula 1 and the search formula 3, the number of times of use of the URL 1 obtained by the search formula 1 and the number of uses of the URL 1 obtained by the search formula 3 are 1 respectively. To increase.
[0035]
When the information resource indicator becomes inaccessible to the information resource, another information resource indicator obtained from the search expression for searching for the information resource indicator can be used.
[0036]
When these three storage tables are used, from the information resource indicator that cannot access the information resource, the information resource indicator is included in the search result, and the search expression that is frequently used is referred to. Other information resources can be obtained.
[0037]
Next, the processing operation of the information resource server according to the present embodiment will be described with reference to the flowchart shown in FIG. FIG. 5 is a flowchart showing the processing operation of the information resource server according to this embodiment. In the example of FIG. 5, a description will be given using a URL as an information resource indicator.
[0038]
First, in the client terminal 10, a user starts a browser and accesses the information resource server 12. The information resource server 12 receives user input data from the client terminal 10 (step S1). The information resource server 12 determines whether the received input data is a search request based on a search formula (step S2).
[0039]
(For a search request using a search expression)
If the input data is a search request based on a search formula, the data in the data server 13 is searched based on the search formula (step S3). This search process uses a known search technique. For example, a search process used in a WWW search engine such as Google (http://www.google.co.jp) is used.
[0040]
Next, it is determined whether or not one or more URLs have been found in the search process. If found, the process proceeds to step S5, and if not found, the process proceeds to step S10. If the URL is not found, the result that the URL was not found is sent from the sending unit to the client terminal 10 (step S10). The information resource specifying unit 24 stores the search formula and the URL searched from the search formula in the search result storage table 22a of the recording unit 22 in association with the user ID for the found URL (step S5). ).
[0041]
The information resource specifying unit 24 checks whether or not the search expression that searched for this URL and the number of times of use are stored for each one or more URLs found in the search expression use count storage table 22b (step S6). If not stored, this retrieval formula is stored, and the number of times this retrieval formula is used is set to 0 (step S7). If stored, the process proceeds to step S8.
[0042]
The information resource specifying unit 24 checks whether or not one or more found URLs and the number of selections thereof are stored for each search expression received from the client terminal in the information resource indicator selection number storage table 22c (step S8). If not stored, this URL is stored, and the number of times this URL is selected is set to 0 (step S9). If stored, the process proceeds to step S10.
[0043]
The URL found by the search expression is transmitted from the transmission unit 28 to the client terminal 10 as a search result.
[0044]
In step S2, if the information resource server 12 determines that the search request is not a search expression, it determines whether the input data is a URL (step S11). If not, the process proceeds to step S18. If the URL is not input, a process corresponding to the received data is performed (step S18), and the process proceeds to step S1.
[0045]
(When URL is received)
If the input from the client terminal is a URL, the access determination unit 25 determines whether the information resource corresponding to the URL can be accessed (step S12). If it can be accessed, the process proceeds to step S13. If it cannot be accessed, the process proceeds to step S19.
[0046]
If the URL can access the information resource, the storage determination unit 26 determines whether this URL is stored in the search result storage table 22a. If it is stored, the process proceeds to step S14 and is stored. If not, the process proceeds to step S17. If the URL is not stored in the search result storage table 22a, the data indicated by the input URL is acquired from the data server 13 from the transmission unit 28 and transmitted to the client terminal 10 (step S17).
[0047]
When the URL is stored in the search result storage table 22a, the search expression including the input URL in the search result among the search expressions associated with the user ID of the user with reference to the search result storage table 22a. Is acquired (step S14).
[0048]
For the search formula acquired in step S12, the search formula usage count in the search formula usage count storage table 22b is incremented by 1 (step S15). Next, the number of information resource indicator selections in the information resource indicator selection count storage table 22c is incremented by 1 for the URL associated with the search expression acquired in step S12 (step S16). Next, the data indicated by the input URL is acquired from the data server 13 from the transmission unit 28 and transmitted to the client terminal 10 (step S17), and the process proceeds to step S1.
[0049]
If the access determination unit 25 determines in step S12 that the URL received from the client terminal 10 cannot be accessed, the search expression associated with the received URL is referred to by referring to the search expression usage count table 22b. It is checked whether it exists (step S19). If there is a search expression associated with the received URL, the process proceeds to step S20, and if not, the process proceeds to step S27. If there is no search expression associated with the received URL, the transmission unit 28 transmits information indicating that the received URL cannot be accessed to the client terminal 10 (step S27), and proceeds to step S1.
[0050]
If there is a search expression associated with the received URL, the search expression associated with the received URL is acquired from the search expression use count storage table 22b (step S20). If there are a plurality of acquired search expressions, the search expression with the highest number of uses is selected (step S21). Next, the URL stored in association with the search formula is acquired from the information resource indicator selection count table 22c (step S22).
[0051]
Next, it is determined whether or not a URL other than the received URL is included in the acquired URL (step S23). If the acquired URL includes a URL other than the received URL, the process proceeds to step S24. If not, the process proceeds to step S25. Another URL that is different from the URL that cannot be accessed from the information resource received from the client terminal is transmitted as an alternative information resource indicator from the transmitting unit 28 to the client terminal 10 (step S24), and the process proceeds to step S1.
[0052]
If there is no URL other than the received URL in the acquired URL, whether there is another search expression associated with the received URL with reference to the search expression usage count storage table 22b. Is determined (step S25). If there is another search expression associated with the received URL, the process proceeds to step S26, and if there is no other search expression, the process proceeds to step S27. If there is no other search expression, the transmission unit 28 transmits information indicating that the received URL cannot be accessed to the client terminal 10 (step S27), and proceeds to step S1.
[0053]
If there is another search expression associated with the received URL, the search expression use count storage table 22b is referred to, and the search expression having the next highest use count is selected after the previously selected search expression (step). S26). Next, the process returns to step S22, and the same operation as described above is repeated based on the selected search expression.
[0054]
As described above, the information resource server of the present invention associates the search request result by the search expression from the client terminal accessing the server with the user ID, and associates the search expression and the search result with the search expression. The information resource indicator and the number of selections thereof are stored in association with the information resource indicator and the search expression and the number of uses thereof are stored. When the input information resource indicator cannot access the information resource indicator, an attempt is made to acquire another information resource indicator using the stored information. As a result, it is possible to access an information resource that is the same as or similar to a desired information resource without requiring the user to pay a special burden such as an address update operation. In addition, since an information resource indicator that can be accessed is acquired based on the number of times the search expression is used or the number of times the information resource indicator is selected, it is relatively simple that there is no need to check the validity of the information resource indicator every fixed period. An information resource server having a configuration can be obtained.
[0055]
In the above embodiment, the URL is used as the information resource indicator. However, the URL is not limited to the URL, and other indicators such as URN (Uniform Resource Name) and URI (Uniform Resource Identifiers) may be used. .
[0056]
In the above embodiment, the information resource server and the data server have different configurations, but may be a data server that also serves as the information resource server of the present invention.
[0057]
(Modified embodiment)
In the above embodiment, when the information resource cannot be accessed by the URL received from the client terminal and another alternative URL cannot be obtained, the client terminal cannot access the received URL. 10 (step S25), the process proceeds to step S1. In this modification, a search process is performed by regarding a character string of a URL that cannot be accessed as a search keyword. The URL obtained as a result of the search process is transmitted to the client terminal 10. Opportunities for obtaining an alternative information resource indicator corresponding to an information resource indicator that has become inaccessible can be expanded.
[0058]
An object of the present invention is to supply a storage medium storing software program codes for realizing the functions of the above-described embodiments to a system or apparatus, and store the computer (or CPU or MPU) of the system or apparatus in the storage medium. It is also achieved by reading and executing the programmed program code.
[0059]
In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention.
[0060]
As a storage medium for supplying the program code, for example, a floppy disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.
[0061]
Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (operating system) operating on the computer based on the instruction of the program code. It goes without saying that a case where the function of the above-described embodiment is realized by performing part or all of the actual processing and the processing is included.
[0062]
Further, after the program code read from the storage medium is written into a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. It goes without saying that the CPU or the like provided in the board or the function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are realized by the processing.
[0063]
【The invention's effect】
As described above, the information resource server of the present invention uses the search formula and the search result as a search formula by associating the search request result by the search formula from the client terminal accessing the server with the user ID. The information resource indicator and its number of selections are stored in association with each other, and the search expression and the number of uses thereof are stored in association with the information resource indicator. When the input information resource indicator cannot access the information resource indicator, an attempt is made to acquire another information resource indicator using the stored information. As a result, it is possible to access an information resource that is the same as or similar to a desired information resource without requiring the user to pay a special burden such as an address update operation. In addition, since an information resource indicator that can be accessed is acquired based on the number of times the search expression is used or the number of times the information resource indicator is selected, it is relatively simple that there is no need to check the validity of the information resource indicator every fixed period. An information resource server having a configuration can be obtained.
Further, from the information resource indicator that cannot access the information resource, this information resource indicator is included in the search result, a search expression that is frequently used is searched, and other information resources searched by this search expression are acquired. Therefore, another information resource indicator that can be effectively accessed can be easily obtained from an information resource indicator in which only the information resource indicator is known, as in the case of hyperlinking.
[Brief description of the drawings]
FIG. 1 shows a block diagram in which an information resource server of the present invention is connected to a client terminal and a data server via a network.
FIG. 2 is a diagram illustrating a storage example of a search result storage table 22a.
FIG. 3 is a diagram showing a storage example of a search expression usage count storage table 22b.
FIG. 4 is a diagram illustrating a storage example of an information resource indicator selection count storage table 22c.
FIG. 5 is a flowchart showing a processing operation of the information resource server according to the exemplary embodiment.
[Explanation of symbols]
10 Client terminal
11 Network
12 Information resource server
13 Data server
21 Control unit
22 Memory unit
22a Search result storage table
22b Search expression usage count storage table
22c Information resource indicator storage table
23 Receiver
24 Information resource identification section
25 Access determination part
26 Memory determination unit
27 Alternative information resource indicator acquisition means
28 Transmitter

Claims (6)

An information resource server connected via a network to a data server that stores information resources and a client terminal that searches for information resources,
Information resource specifying means for specifying the corresponding information resource in the data server searched based on the search formula received from the client terminal;
Storage means for storing the search expression and an information resource indicator for identifying the identified information resource in association with each other;
An access determination means for determining whether the information resource indicated by the information resource indicator received from the client terminal is accessible;
A storage determination unit that determines whether or not an information resource indicator that is determined to be inaccessible by the access determination unit is stored in the storage unit;
An alternative information resource indicator acquiring means for acquiring another information resource indicator specified by a search expression corresponding to the stored information resource indicator;
An information resource server, comprising: a transmission unit that transmits the acquired other information resource indicator to a client terminal. The storage means
A search result storage table for storing the search formula received from the client terminal and the information resource indicator specified by the search formula in association with the user ID of the client terminal;
A search expression usage count storage table that stores a search expression that identifies an information resource indicator, and the number of times that the search expression is used to identify the information resource indicator, in association with the information resource indicator;
2. An information resource indicator selection number storage table for storing an information resource indicator specified by a search expression and the number of times the information resource indicator is selected in association with the search expression. Information resource server described in. The storage means
When a client device requests access to information resources,
Updating the number of times the search expression is used in the search expression use count storage table corresponding to the information resource for which access is requested;
The information resource server according to claim 1 or 2, wherein the information resource indicator is updated and stored with the number of selections of the information resource indicator corresponding to the information resource requested to be accessed. The alternative information resource indicator obtaining means includes
Search from the list of search expressions corresponding to the information resource indicator determined to be inaccessible in order from the most frequently used search expression,
4. The information resource server according to claim 1, wherein another information resource indicator is tried to be acquired from the selected search expression. In response to an information resource request from a client terminal received via a network, an information resource providing method for acquiring a corresponding information resource from a data server and transmitting the obtained information resource to the client terminal,
Identifying a corresponding information resource in the data server searched based on the search expression received from the client terminal;
A storage step of storing the search formula and an information resource indicator that identifies the specified information resource in association with each other;
An access determination step for determining whether the information resource indicated by the information resource indicator received from the client terminal is accessible;
A storage determination step for determining whether or not the information resource indicator determined to be inaccessible by the access determination means is stored in the storage means;
An alternative information resource indicator acquisition step of acquiring another information resource indicator specified by a search expression corresponding to the stored information resource indicator;
And a transmitting step of transmitting the acquired other information resource indicator to the client terminal. A computer program for causing a computer to function as the information providing server according to claim 1.

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