KR20010064812A - Method for transmitting effective file in internet - Google Patents

Abstract

PURPOSE: A method for transmitting an intellectual file on the Internet is provided to increase the reliability of file transmission by excluding unnecessary network traffic in the course of file transmission, and by providing an alternative plan according to communication failure. CONSTITUTION: A name of a file is inputted as an intermediate variable(201). A type-1 packet is generated in order to check the file and send information on the file to be transmitted to a server(202). It is judged whether the type-1 packet is successfully generated(203). In case that the packet isn't successfully generated, it is processed as a file transmission error(204). In case that the packet is generated, the packet is transmitted to the server(205). It is confirmed whether communication disorder is generated(206). In case that the disorder is generated, it is processed as file transmission error(207). In case that the disorder isn't generated, an arbitrary response packet from the server is waited(208). It is confirmed whether communication disorder is generated(209). It is processed as the file transmission error(210).

Description

Intelligent file transfer method on the Internet {METHOD FOR TRANSMITTING EFFECTIVE FILE IN INTERNET}

The present invention relates to an intelligent file transfer method on the Internet and a computer-readable recording medium recording a program for realizing the method. In particular, the present invention relates to a method for dealing with communication failures by eliminating unnecessary network traffic during file transfer. The present invention relates to an intelligent file transfer method for effectively transferring files and a computer-readable recording medium having recorded thereon a program for realizing the method.

In general, the typical technology for file transfer is the FTP (File Transfer Protocol) protocol.

The FTP protocol is simply a file transfer protocol. Therefore, there is no function to check whether the file can be received by checking the file system of the other party before transmitting the file. In addition, when an error occurs during the file transfer, since the resend function for the previously transmitted file is not implemented, it is not only inconvenient to retransmit the corresponding file from the beginning, but there is also a problem in that communication traffic increases accordingly. .

The present invention has been made to solve the problems described above, to eliminate unnecessary network traffic during the file transfer process to users who want to transfer files on the Internet, and to provide a countermeasure according to communication failure to file transfer It is an object of the present invention to provide an intelligent file transfer method for providing reliability and a computer-readable recording medium recording a program for realizing the method.

1 is an exemplary configuration diagram of a file transfer system to which the present invention is applied.

2A to 2D are flowcharts of one embodiment of a client-side file transfer method on the Internet according to the present invention.

3A to 3D are flowcharts of one embodiment of a server-side file transfer method on the Internet according to the present invention.

* Explanation of symbols for the main parts of the drawings

11: File transfer module for client 12: File transfer module for server

13: TCP / IP

In order to achieve the above object, the present invention provides an intelligent file transfer method on the Internet that is applied to a file transfer system. Before transmitting a file, the transmitting side informs the receiving side of information about a file to be transmitted. A first step of notifying a transmitting side whether a file can be received; A second step of sequentially storing information about the received file while receiving the file; And a third step of checking and notifying a file reception result between the transmitting parties.

In addition, the present invention, before transmitting a file to the file transfer system having a processor, the transmitting side informs the receiving side of the information about the file to be transmitted, and the receiving side informs the transmitting side whether or not the file can be received. ; Storing information on the received file while receiving the file in sequence; And a computer-readable recording medium having recorded thereon a program for realizing a function of checking and notifying a file reception result between the transmitting parties.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary configuration diagram of a file transfer system to which the present invention is applied.

As shown in FIG. 1, the present invention assumes a transmission network (TCP / IP) 13 as a lower network. The file transfer module 11 for a client supports both a personal computer (PC) and a UNIX (UNIX) environment, and the file transfer module 12 for a server supports a UNIX environment. Once the subscriber wants to transfer the file, he executes the client file transfer module 11 shown in FIG. The executed file transfer module 11 for a client establishes a virtual connection with the file transfer module 12 for a server operated in a server, and then generates packets to perform a file transfer operation.

The present invention relates to a method for transmitting an effective file on the Internet and is configured in a client / server manner. The client file transfer module checks whether the other party can receive the file by analyzing information on the file before sending the file, that is, file name, file length, etc. Notify the client of the packet.

Therefore, in the present invention, it is possible to eliminate unnecessary network traffic due to file transfer, and also by sending the file size and file size information to be transmitted in each step of transmitting the file content in the packet, in the file transfer process In order to prepare for a situation where an error occurs in the communication terminal, a file extensibility function may be additionally implemented.

Here, an example of a packet structure exchanged between a client and a server is shown in Tables 1 to 6 below.

[Table 1] is a type-1 packet structure diagram generated to send information on a file to be sent to a server.

[Table 2] is a type-2 packet structure diagram generated to notify the other party when an error occurs in the file transmission process.

[Table 3] is a Type-3 packet structure generated by the server to inform the client that the file can be received.

[Table 4] is a Type-4 packet structure diagram that is actually generated to transmit file contents.

[Table 5] is a Type-5 packet structure diagram generated to notify the other party that there is no content to transmit for the corresponding file.

[Table 6] is a type-6 packet structure diagram showing a response packet for type-5 at a server, that is, a file receiving side.

2A to 2D are flowcharts of an embodiment of a client-side file transfer method on the Internet according to the present invention.

As shown in Fig. 2a to 2d, first receives a file name to be transmitted as a parameter (201) generates a type-1 packet generated to check the file and to send information about the file to be sent to the server After that (202), it is determined whether the type-1 packet was successfully generated (203).

As a result, if it is not generated, it is treated as a file transfer error (204), and if it is generated, after transmitting a type-1 packet generated to send information about a file to be sent to the server (205), whether a communication failure has occurred. Confirm (206).

As a result, if a communication failure occurs, it is treated as a file transfer error (207). If a communication failure does not occur, the server waits for an arbitrary response packet from the server (208), and then again checks whether a communication failure occurs (209).

As a result, if a communication failure occurs, it is treated as a file transmission error (210), and if a communication failure does not occur, it is checked whether or not a type-2 packet is generated to notify the other party of an error in the file transmission process. 211).

As a result of the check, if a type-2 packet is received, it is treated as a file transmission error (212). Check (213).

As a result, if the type-3 packet is not received, it is treated as a file transfer error (214). If it is received, the file length is checked (215), and then "S_FILE_DATA structure" (that is, in the program) A structure that manages information about the file (216), and generates a type-4 packet generated to actually transmit the file content and transmits it to the server (217).

Then again, it is checked whether a communication failure has occurred (218).

As a result, if a communication failure occurs, it is treated as a file transfer error (219). If it does not occur, it waits for an arbitrary packet from the server (220) and again checks whether a communication failure occurs (221).

As a result, if a communication failure occurs, it is treated as a file transmission error (222). If a failure does not occur, it is checked whether or not a type-2 packet is generated to notify the other party of an error in the file transmission process (223).

As a result, if it is received, it is treated as a file transmission error (224). If it is not received, it is checked whether a type-3 packet generated by the server is received (225) to inform the client that the file can be received.

As a result, if it is not received, it is treated as a file transmission error (226). If it is received, the file information is fetched (227).

If it remains, the process proceeds to the process of filling the S_FILE_DATA structure to transmit the file (216), and if it does not exist, generates and sends a type-5 packet generated to inform the other party that there is no further content for the file After that (229) it is confirmed whether a communication failure has occurred (230).

As a result, if a communication failure occurs, it is treated as a file transfer error (231). If a communication failure does not occur, after receiving an arbitrary packet from the server (232), it is checked whether a communication failure occurs (233).

As a result, if a communication failure occurs, it is treated as a file transfer error (234), and if a communication failure does not occur, it is checked whether a type-6 packet, which is a response packet for the type-5, is received by the server, that is, the file receiving party. 235).

As a result of the check, if a type-6 packet is not received, it is processed as a file transfer error (236). If a type-6 packet is received, it is processed as a file reception success (237).

3A to 3D are flowcharts of an embodiment of a server-side file transfer method on the Internet according to the present invention.

As shown in FIGS. 3A to 3D, first, a directory to store a file is received as a parameter (301), and a random packet is waited for from a client (302).

As a result, if a communication failure occurs, it is treated as a file reception error (304). If the communication failure does not occur, it is checked whether a type-1 packet generated to send information about a file to be transmitted to the server is received (305).

As a result, if the type-1 packet is not received, it is treated as a file reception error (306). If the type-1 packet is received, the S_FILE_NAME information is generated from the type-1 packet generated to send information about the file to be sent to the server. Extract (307), open the file with the intended name (308), and verify that the file was successfully opened (309).

As a result of the check, if an error occurs in the file transmission process to notify the other party if it is not opened, it generates and transmits a type-2 packet generated to notify the other party as a file reception error (310). A type-3 packet generated by the server is generated and transmitted to inform the client that it is possible (311).

Then again, it is checked whether a communication failure has occurred (312).

As a result, if a communication failure occurs, it is treated as a file reception error (313). If the communication failure does not occur, it waits for a random packet from the client (314) and checks whether a communication failure has occurred (315).

As a result, if a communication failure occurs, it is treated as a file reception error (316). If the communication failure does not occur, it is checked whether a type-4 packet generated for actually transmitting a file content is received (317).

As a result, if a type-4 packet is not received, it is treated as a file reception error (318). If a type-4 packet is received, the S_FILE_DATA structure is extracted from the type-4 packet generated to actually transmit the file contents. In step 319, it is checked whether an error occurs in extracting data.

As a result of the check, if an error occurs, a type-2 packet is generated and transmitted to notify the other party when an error occurs in the file transmission process and processed as a file reception error (321). After copying the buffer contents and storing the received file size (322), a type-3 packet generated by the server is generated and transmitted (323) to inform the client that the file can be received.

Then again, it is checked whether a communication failure has occurred (324).

As a result, if a communication failure occurs, it is treated as a file reception error (325). If the communication failure does not occur, it waits for a random packet from the client (326) and checks whether a communication failure has occurred (327).

As a result, if a communication failure occurs, it is treated as a file reception error (328). If the communication failure does not occur, it is checked whether a type-4 packet generated for actually transmitting the file content is received (329).

As a result of the check, if a type-4 packet is received, the process proceeds to step 319 of extracting the S_FILE_DATA structure from the type-4 packet that is actually generated to transmit the file contents. In step 330, it is determined whether a type-5 packet is generated to inform the other party that there is no content to transmit.

As a result, if a type-5 packet is not received, the server receives a file reception error (331). If a type-5 packet is received, a response packet for the type-5 is received from the server, that is, the file receiving the response packet. After generating and transmitting the IN-6 packet (332), it is checked whether a communication failure occurs (333).

As a result of the check, if a communication failure occurs, it is processed as a file reception error (334), and if a communication failure does not occur, it is processed as a file reception success (335).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

As described above, the present invention can effectively remove unnecessary network traffic during file transmission / reception process by providing effective file transfer on the Internet, provide reliability according to file transfer, and give file contents. By managing the file length transmitted for each client / server at each stage of receiving, there is an excellent effect to enable the file transfer to extend its performance, such as file transfer function in case of communication failure.

Claims (6)

In the intelligent file transfer method on the Internet applied to the file transfer system, A first step of informing the receiving side of the information about the file to be transmitted before transmitting the file, and informing the receiving side of whether the reception of the file is possible; A second step of sequentially storing information about the received file while receiving the file; And A third step of checking and notifying a file reception result between the transmitting parties Intelligent file transfer method on the Internet comprising a. The method of claim 1, If an error occurs during the file transfer process of the second step, Intelligent file transfer method on the Internet, characterized in that only the remaining portion of the file is transferred. The method according to claim 1 or 2, The first step is, A fourth step of receiving a packet of a first type sent to a receiver to send information on a file to be transmitted at a transmitter, and extracting information on a file name and a file size; A fifth step of checking whether the receiving side can receive a file from the transmitting side based on the extracted information; A sixth step of generating a second type of packet and notifying the other party if an error occurs during the checking process; And A seventh step of generating a third type of packet for notifying the transmitting side that the file can be received from the transmitting side; Intelligent file transfer method on the Internet comprising a. The method of claim 3, wherein The second step, An eighth step of extracting packet file contents of a fourth type which is actually generated for transmitting the file contents; A ninth step of notifying the sender when an error occurs and processing it as a file receiving error; And A tenth step of copying the contents of the buffer to the opened file and storing information on the received file size; And An eleventh step of receiving the file contents sequentially by notifying the transmitting side Intelligent file transfer method on the Internet comprising a. The method of claim 4, wherein The third step, A twelfth step of confirming whether a received packet of the fifth type is generated to notify the receiving party that there is no further content to be transmitted for the file; And A thirteenth step of transmitting a sixth type of packet generated to respond to the sender that file reception has been successfully processed; Intelligent file transfer method on the Internet comprising a. In a file transfer system having a processor, A function of notifying the receiving side of information about a file to be transmitted to the receiving side before transmitting the file, and notifying the transmitting side of whether the receiving side can receive the corresponding file; Storing information on the received file while receiving the file in sequence; And A function of checking and notifying a file reception result between the sending parties A computer-readable recording medium having recorded thereon a program for realizing this.