JP2000132449A - Proxy access method, device therefor and record medium recorded with proxy access program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a user to obtain a display free of illegal character without changing settings of a Web browser in a system comprising the Web browser, the proxy access device, and a Web server. SOLUTION: A result HTML file from the Web server 3 after being received by an access repeating part 21 is given to a tag analysis part 22. The tag analysis part 22 received the result HTML file and checks whether or not there is a META tag. When no META tag is present, the HTML file is given to a character code discrimination part 23. When a META tag is found, the setting of charset (character set) properties in the tag is checked and when no setting is made, the result HTML file is given to the character code discrimination part 23. The character code discrimination part 23 checks the given HTML to discriminates its character code and character set and gives the discrimination results to the tag analysis part 22. The tag analysis part 22 embeds the META tag and charset properties in the result HTML file and returns it to the Web browser through the access repeating part 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a proxy access method for receiving an access request from a Web browser to a Web server, reissuing the request to the Web server, and then returning the file returned from the Web server to the Web browser. And equipment.

[0002]

2. Description of the Related Art In a Web browser, a received file is displayed in accordance with a character code and a character set (set of characters) (or a default character set) set by a user in advance. If the settings and the character code and character set of the actually received file are different, the characters will be garbled, but the user will deal with them by changing the settings each time.

[0003] In addition, when a conventional proxy access device relays access from a Web browser to a Web server, the proxy access device converts the character code of a received file and then converts the character code into a W code.
Return it to the web browser. According to this technology, the file is converted into a predetermined character code and returned to the Web browser regardless of the character code of the original file and the type of character set. W
By setting the character code after conversion on the web browser in advance, garbled characters are avoided.

[0004]

In the Web browser, when the setting differs from the character code and character set of the actual file as described in the above-mentioned prior art, the user needs to change the setting each time. In a Web browser in a multilingual environment, a situation in which a user changes the setting frequently occurs, and the setting load becomes a serious problem. Therefore, a mechanism for reducing the set load as much as possible is required.

A conventional proxy access device converts a file received from a Web server into a predetermined character code. However, this method performs character code conversion without being aware of the character code and character set of the file, so that the file to be browsed is changed. Does not work well if the file is multilingual. For example,
Assume that the proxy access device converts all files to SJIS. JIS whose character code to be viewed is Japanese
If the file is an ASCII file, copy it to SJ
Since conversion to IS is possible, the Web browser can normally display the converted file. However, if a Korean or Chinese EUC file is included in the browsing target, the EUC file cannot be converted to SJIS, so that the Web browser that receives the converted file will have garbled characters. More problematic is Korean EUC (Extended
Even if the file is a Unix Code) file, it is forcibly converted to SJIS, and the character code of the converted file is undefined. Therefore, We
b. No matter how much you change the settings on the browser side, the file cannot be browsed forever.

If the character code and character set are explicitly specified in all files returned from the Web server, the above-described problem does not occur, and the Web browser displays characters according to the specification and garbles characters. Can be avoided.
However, such a designation is hardly made in an actual file, and the above-mentioned problem occurs because the Web browser cannot obtain the information. For example, in HTML (Hyper Text Markup Language), M
The ETA tag is a tag for specifying a character code and a character set. The meta tag is a charset as its attribute
(Character set) attribute, and the character code and character set can be specified by the attribute value. These are intended to explicitly indicate what character codes and character sets are described in the HTML file. W
If there is a META tag and a charset attribute, the web browser performs display according to the character code and character set without depending on the setting of the user. However, H in the current Web server
Only a very small number of TME files specify the META tag and the charset attribute, and the Web browser cannot use the information effectively. Web
The browser uses character code and character set information set by the user to supplement the information.

[0007] It is an object of the present invention to provide a proxy access method and apparatus, and a recording medium on which a proxy access program is recorded, which allows a user to perform display without garbled characters without changing settings of a Web browser. .

[0008]

In a system comprising a Web browser, a proxy access device, and a Web server,
The access request from the Web browser is once accepted by the proxy access device, and is again
Issued to server b. The file returned from the Web server is once received by the proxy access device, and checks whether there is any information for character code and character set designation in the file. If not set, the character code and character set of the file are identified, the identification information is added, and the file is returned to the Web browser. W
Since the web browser performs display in accordance with the designated information, it is possible to perform display without garbled characters without changing the browser settings even in a browser in a multilingual environment. Also, even if the identification by the proxy access device fails and the characters are garbled on the browser side, the code conversion of the file itself is not performed unlike the conventional proxy access device, so that the display can be made by changing the settings on the browser side.

In the case of HTML, the charset of the META tag
If the attribute is not used and the information is not specified, the information is embedded in the file and returned to the Web browser. As a result, all HTML files returned to the Web browser are provided with a META tag and a charset attribute, and can be displayed based on the information.

[0010]

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

Referring to FIG. 1, a system according to an embodiment of the present invention includes a Web browser 1, a proxy access device 2, and a W
It is composed of an eb server 3. The proxy access device 2 includes an access relay unit 21, an analysis unit 22, and a character code identification unit 23.
including.

FIG. 2 is a diagram showing the procedure of the process of the embodiment of FIG. In this example, an HTML file is returned from the Web server 3. The user can use the URL (Uniform Resource) of the target Web server 2 with the Web browser 1.
Locator), an access request is issued (step 31). At this time, the user can use the Web server 3 via the proxy access device 2 by setting the proxy designation of the browser in the proxy access device 2. The access relay unit 21 once receives an access request from the browser 1 and issues the same request again to the Web server 3 (step 32).
The TML file is once received by the access relay unit 21 and passed to the tag analysis unit 22 (steps 33 and 3).
4). The tag analysis unit 22 receives the HTML file returned from the Web server 3, and first checks whether there is a META tag (step 35). If the META tag is not set, the character code and character set of the HTML file are not explicitly specified, and are passed to the character code identification unit 23 (step 36). M
If an ETA tag has been set, it is checked whether the Charset attribute in the tag has been specified (step 37). char
If the set attribute is specified, the HTML
The character code and character set of the file are specified, and the HTML is directly transmitted to the access relay unit 21 as it is.
The file is returned (step 38). If the charset attribute is not specified, the character code and character set of the HTML file are not explicitly specified, and the character code identification unit 23 performs the identification (step 3).
6).

The character code identification section 23 receives the HTM
The L file is inspected and its character code and character set are identified. For example, Japanese Patent Application Laid-Open No. 9-21
The method described in 2334 can be used. The character code and character set information of the identification result are returned to the tag analysis unit 22 (step 39).

The tag analysis unit 22 adds a META tag and a charset attribute to the result HTML file and returns them to the access relay unit 21 (steps 40 and 41). FIG.
(1) and FIG. 3 (2) show examples of a META tag and a charset attribute embedded in an HTML file.

Result H after processing by proxy access device 2
The TML file is returned to the Web browser 1 (Step 42).

HT finally returned to Web browser 1
Since the character code and character set of all ML files are explicitly specified by the META tag and its charset attribute, the Web browser 1 displays the resulting HTML file according to the specification, thereby enabling display without garbled characters. .

Referring to FIG. 4, the proxy access device according to one embodiment of the present invention includes a receiving device 51, a storage device 52, a transmitting device 53, a recording medium 54, and a data processing device 55. The receiving device 51 receives the access request from the Web browser 1 and outputs the result HTM from the Web server 3.
Receive the L file. The transmitting device 53 transmits the access request to the Web server 3 and transmits the resulting HTML file to the Web browser 1. The storage device 52 is a hard disk. The recording medium 54 is a recording medium such as a floppy disk, CD-ROM, or magneto-optical disk in which the processing of the proxy access device 2 shown in FIG. 2 is recorded as a proxy access program. The data processing device 55 is a CPU that reads the proxy access program from the recording medium 54 into the storage device 52 and executes the program.

[0018]

As described above, according to the present invention, it is possible to display characters without garbled characters without changing the settings of the Web browser, and to greatly reduce the load for the settings. Can be.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of an embodiment of the present invention.

FIG. 2 is a diagram showing a processing flow in the embodiment of FIG. 1;

FIG. 3 is a diagram illustrating an example of a META tag and a Charset attribute embedded in an HTML file.

FIG. 4 is a configuration diagram showing another embodiment of the proxy access device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Web browser 2 Proxy access device 3 Web server 21 Access relay unit 22 Tag analysis unit 23 Character code identification unit 31 to 42 Step 51 Receiving device 52 Storage device 53 Transmitting device 54 Recording medium 55 Data processing device

Claims (6)

[Claims] 1. A proxy access method for receiving an access request from a Web browser to a Web server, reissuing the request to the Web server, receiving a file returned from the Web server, and returning the file to the Web browser. Analyzing whether the character code and character set information is explicitly described in the received file, and if not described, identifying the character code and character set and specifying the identification result in the file A proxy access method, wherein the file is returned to the Web browser after the data is embedded. 2. The file is an HTML file, the character code and the character set are META tags, cha
The method of claim 2, wherein the method is an rset attribute. 3. A method for relaying an access request from a Web browser to a Web server, receiving a result file returned from the Web server, and transmitting the result file to the Web server.
An access relay unit for returning to a browser, analyzing whether a character code and a character set information are explicitly described in the received result file, and embedding an identification result in the file as the result file A tag analysis unit to be output to the access relay unit; and, as a result of the analysis by the tag analysis unit, when it is determined that the information of the character code and the character set is not explicitly described in the file, the character code and the character information A proxy access device having a character code identification unit for performing identification and outputting the identification result to the tag analysis unit. 4. The file is an HTML file, and the character code and character set are META tags,
4. The device of claim 3, wherein the device is a set attribute. 5. A method for relaying an access request from a Web browser to a Web server, receiving a result file returned from the Web server, and transmitting the result file to the Web server.
Access relay processing for returning to the plaza, analyzing whether character code and character set information is explicitly described in the received file, embedding the identification result in the file, and then accessing the file as the result file The tag analysis processing to be output to the relay processing and, as a result of the analysis by the tag analysis processing, when it is determined that the set of the character code and the character information is not explicitly described in the file, the character code and the character information are identified. Do
A recording medium recording a proxy access program for causing a computer to execute a character code identification process for outputting the identification result to the tag analysis process. 6. The file is an HTML file, the character code and the character set are META tags,
The recording medium according to claim 5, wherein the recording medium has a charset attribute.