CN113497829A - Method for controlling electronic class cards based on websocket - Google Patents
Method for controlling electronic class cards based on websocket Download PDFInfo
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- CN113497829A CN113497829A CN202110614651.XA CN202110614651A CN113497829A CN 113497829 A CN113497829 A CN 113497829A CN 202110614651 A CN202110614651 A CN 202110614651A CN 113497829 A CN113497829 A CN 113497829A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000003860 storage Methods 0.000 claims abstract description 61
- 230000005540 biological transmission Effects 0.000 claims abstract description 30
- 238000007689 inspection Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 abstract description 9
- 230000002457 bidirectional effect Effects 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/10—Services
- G06Q50/20—Education
- G06Q50/205—Education administration or guidance
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/161—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
- H04L69/162—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields involving adaptations of sockets based mechanisms
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- General Health & Medical Sciences (AREA)
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- Educational Technology (AREA)
- Strategic Management (AREA)
- Tourism & Hospitality (AREA)
- Health & Medical Sciences (AREA)
- Economics (AREA)
- Computer Security & Cryptography (AREA)
- Human Resources & Organizations (AREA)
- Marketing (AREA)
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
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- Medical Informatics (AREA)
- Storage Device Security (AREA)
Abstract
The invention discloses a websocket-based method for controlling an electronic class board. Compared with the existing one-way polling type electronic class board instruction sending mode, the method has the advantages that the bidirectional data exchange between the client and the server can reduce the pressure of the campus server and improve the response time of the electronic class board through the application of the WebSocket transmission protocol; and further, the condition that the instructions of the electronic class board and the server side are repeatedly sent is reduced, and redundant data are prevented from occupying storage spaces of a transmission channel, the server and a third-party database. Meanwhile, the third-party database is connected with the plurality of electronic class cards and the server through a network, so that the response speed of the electronic class cards is facilitated, and the network transmission and memory load of the server side in operation is reduced.
Description
Technical Field
The invention belongs to the field of communication equipment in a school, and particularly relates to a method for controlling an electronic class board based on websocket.
Background
The existing electronic class board control mainly adopts distributed management, namely the electronic class board is in communication connection with a server to obtain an information storage instruction from the server, then responds to the information storage instruction, stores information to be stored, obtains an information calling instruction and calls the stored information; and responding to the information calling instruction, and displaying the stored information, so that the information displayed by the electronic class board is more time-efficient. Meanwhile, the existing electronic class board is easily interfered by other terminal equipment to cause the loss of display data.
Disclosure of Invention
The purpose of the invention is as follows: the method for controlling the electronic class cards based on the websocket is provided, and the problems in the prior art are solved.
The technical scheme is as follows: a method for controlling an electronic class card based on websocket includes that the electronic class card and a server end are built in the same local area network, and are communicated with a third-party database through an external network, and the method includes the steps of
The client side handshakes to the server side to establish a connection channel, and the client side sends an instruction to the server side;
the server judges whether the command is a storage command or not, and if the command is the storage command, the server transmits the storage command to the appointed electronic class board;
the designated electronic class board uploads data to a third-party cloud database after receiving the storage instruction, sends a message to the server after uploading is successful, and the server acquires the uploaded storage path and then sends the acquired storage path to the client;
the server side judges whether the operation instruction is a storage instruction or not, performs second identification judgment, judges whether the operation instruction is sent by the client side, transmits the operation instruction to the electronic class board application layer for execution if the operation instruction is judged by the server side, and judges whether the operation instruction is repeatedly executed or not; if the repeated execution condition exists, returning a message to the server, and forbidding the client to send the instruction again;
if the server side judges that the operation instruction is not the operation instruction, judging the type of the inspection instruction;
and if the repeated execution does not exist, the electronic class card is transmitted to the application layer to be operated and executed.
In a further embodiment, a unique device serial number is set in the single electronic class board, and before the further client handshakes to the server to establish the connection channel, the client handshakes to the server to establish the connection channel and transmits and encrypts the sending instruction through a WebSocket transmission protocol.
In a further embodiment, after the designated electronic shift board uploads the data to the third-party cloud database after receiving the storage instruction, a clearing program is set to clear the storage instruction which is not called in the third-party cloud database within three months.
In a further embodiment, the transmission encryption method is as follows:
the method comprises the steps that end-to-end transmission of a plurality of electronic class cards and a server is achieved through a client of an electronic class card control system; an encryption algorithm is arranged in each electronic class board transmission module to encrypt transmission information;
the server side establishes an encryption system and an encryption system database corresponding to an encryption algorithm;
the equipment serial number and the instruction of a single electronic class board are encrypted by an encryption algorithm and then sent to a server to obtain a ciphertext,
after receiving the ciphertext, the server encrypts the ciphertext again;
the server encryption system carries out decryption inquiry on the ciphertext subjected to secondary encryption through the encryption system database;
if the matching is correct, the electronic class card is connected with the electronic class card through a handshake protocol;
in a further embodiment, the third party cloud database cleaning procedure includes the steps of:
sending a storage instruction to a server through a client control system, and sending the storage instruction to a third-party database after the storage instruction is forwarded to a designated electronic class board through the server;
before the appointed electronic class board sends the storage instruction to the third-party database, the server acquires a timestamp when the storage instruction is uploaded and a ciphertext of the serial number of the electronic class board equipment, and then archiving and recording the uploading operation;
the third-party database provides a temporary shield for the server side and hides an encryption key in the encryption system;
and the server clears the storage instruction in the third-party database according to the time stamp of the archived data and the ciphertext of the equipment serial number, and sends the time stamp data of the deleting instruction to the server for archiving, so that the data can be recovered at the later stage.
Has the advantages that: compared with the existing one-way polling type electronic class board instruction sending mode, the method has the advantages that the bidirectional data exchange between the client and the server can reduce the pressure of the campus server and improve the response time of the electronic class board through the application of the WebSocket transmission protocol; and further, the condition that the instructions of the electronic class board and the server side are repeatedly sent is reduced, and redundant data are prevented from occupying storage spaces of a transmission channel, the server and a third-party database. Meanwhile, the third-party database is connected with the plurality of electronic class cards and the server through a network, so that the response speed of the electronic class cards is facilitated, and the network transmission and memory load of the server side in operation is reduced.
Drawings
FIG. 1 is a structural framework diagram of the websocket-based control electronic class board system of the present invention.
FIG. 2 is a flow chart of the websocket-based control electronic class board work flow of the present invention.
Fig. 3 is a flow chart of the operation of the encrypted transmission of the present invention.
Fig. 4 is a flowchart of the operation of the third party data executing the delete command of the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
The applicant finds that the existing electronic class board control is mainly distributed management, namely the electronic class board is in communication connection with a server to obtain an information storage instruction from the server, then responds to the information storage instruction, stores information to be stored, obtains an information retrieval instruction and retrieves the stored information; and responding to the information calling instruction, and displaying the stored information, so that the information displayed by the electronic class board is more time-efficient. Meanwhile, the existing electronic class board is easily interfered by other terminal equipment to cause the loss of display data.
In addition, the existing server is adopted to send a storage instruction and then respond to an information storage instruction and then obtain a calling instruction, the time delay causes the control effect to be always untimely, and the instruction is easy to be repeated and the calling instruction is returned without response, so that the server is not only stressed but also is a potential fault hazard of a class card. The server side sends an information storage instruction to the equipment, then the electronic class board responds to the storage instruction, then the server calls the information storage instruction and sends a calling instruction, and the class board responds. The storage of the instruction and the return of the instruction are all that the server sends to the electronic class board without the feedback of the electronic class board, if the electronic class board is in a fault state or in a standby state and cannot receive the instruction of the server, the server continues to request not only the waste of resources but also return error information.
As shown in fig. 1 to 2, in the method for controlling an electronic class board based on a websocket, the electronic class board and a server side in the method are constructed in the same local area network, and are communicated with a third-party database through an external network.
The method comprises the following steps:
step one, a client side handshakes to a server side to establish a connection channel, and the client side sends an instruction to the server side;
step two, the server judges whether the command is a storage command, and if the command is the storage command, the server transmits the storage command to the appointed electronic class board;
thirdly, the appointed electronic class board uploads the data to a third-party cloud database after receiving the storage instruction, a message is sent to a server side after the uploading is successful, and the server side sends the obtained storage path to a client side after obtaining the uploaded storage path;
step four, the server side judges whether the storage instruction is a storage instruction or not, performs second identification judgment, judges whether the client side sends an operation instruction or not, transmits the operation instruction to the electronic class board application layer for execution if the server side judges that the operation instruction is the operation instruction, and judges whether the operation instruction is repeatedly executed or not; if the repeated execution condition exists, returning a message to the server, and forbidding the client to send the instruction again;
step five, if the server side judges that the operation instruction is not the operation instruction, judging the type of the inspection instruction;
and step six, if the repeated execution does not exist, the electronic class card is transmitted to an operating system for operation execution.
The application of a WebSocket transmission protocol enables bidirectional data exchange between the client and the server to reduce the pressure of the campus server and improve the response time of the electronic class board; and further, the condition that the instructions of the electronic class board and the server side are repeatedly sent is reduced, and redundant data are prevented from occupying storage spaces of a transmission channel, the server and a third-party database.
And a unique equipment serial number is set in a single electronic class board, and in a further step, a client handshake connection channel is established from the client to the server to transmit and encrypt the sending instruction through a WebSocket transmission protocol.
Considering that the purposes and the distribution scenes of each electronic class board are different, the identity authentication is carried out through the equipment serial number inside the local area network, and then operation instructions and different tasks are dispatched. The steps of the transmission encryption method for the electronic class cards shown in fig. 3 are as follows:
step 1.1, end-to-end transmission of a plurality of electronic class cards and a server is realized through a client of an electronic class card control system; an encryption algorithm is arranged in each electronic class board transmission module to encrypt transmission information;
step 1.2, the server side establishes an encryption system and an encryption system database corresponding to an encryption algorithm;
step 1.3, the equipment serial number and the command of the single electronic class board are encrypted by an encryption algorithm and then sent to a server to obtain a ciphertext,
step 1.4, after receiving the ciphertext, the server encrypts the ciphertext again;
step 1.5, the server encryption system carries out decryption query on the secondarily encrypted ciphertext through the encryption system database;
step 1.6, if the matching is correct, the electronic class card is connected with the electronic class card through a handshake protocol;
and clearing the memory instructions which are not called in three months in the third-party cloud database in the third step. And secondly, the condition of searching and recovering the deleted data is considered.
Considering that the third-party database also has memory limitation, the clearing algorithm is adopted to sequentially clear the data in the third-party database according to the time stamp of the storage instruction as the identification basis, and the time interval for starting the clearing algorithm can be self-timed, for example, the clearing algorithm is set to be cleared once in march. The third party cloud database purging step as shown in fig. 4 further includes:
step 3.1, sending a storage instruction to a server side through a client side control system, and sending the storage instruction to a third-party database after the storage instruction is forwarded to a designated electronic class board through the server side;
3.2, before the appointed electronic class board sends the storage instruction to a third-party database, the server acquires a timestamp of the storage instruction during uploading and a ciphertext of the serial number of the electronic class board equipment, and then archives and records the uploading operation;
3.3, the third-party database provides a temporary shield for the server side and hides the encryption key in the encryption system; the temporary shield is equivalent to a password for a period of time, and is different at intervals of time, so that the privacy and the security of the third-party file are protected
And 3.4, the server side clears the storage instruction in the third-party database according to the time stamp of the archived data and the ciphertext of the equipment serial number, and simultaneously sends the time stamp data of the deleting instruction to the server side for archiving, so that the document can be conveniently searched and deleted and the data can be conveniently recovered at the later stage.
In addition, the invention can repeatedly call functions, can operate a plurality of electronic class boards, can modify the functions, modify the ciphertext rules, and modify the timed deletion storage instructions of a third-party library, which use remote connection to operate different types of equipment.
The third-party database is connected with the electronic class cards and the server through a network, so that the response speed of the electronic class cards is facilitated, network transmission and memory load of operation of the server are reduced, the situation that instructions of the electronic class cards and the server are repeatedly sent is reduced, and the fact that the storage space of the transmission channel, the server and the third-party database is occupied by the quantity of redundant data is avoided.
Compared with the existing one-way polling type electronic class board instruction sending mode, the method has the advantages that the bidirectional data exchange between the client and the server can reduce the pressure of the campus server and improve the response time of the electronic class board through the application of the WebSocket transmission protocol; and further, the condition that the instructions of the electronic class board and the server side are repeatedly sent is reduced, and redundant data are prevented from occupying storage spaces of a transmission channel, the server and a third-party database. Meanwhile, the third-party database is connected with the plurality of electronic class cards and the server through a network, so that the response speed of the electronic class cards is facilitated, and the network transmission and memory load of the server side in operation is reduced.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the embodiments, and various equivalent changes can be made to the technical solution of the present invention within the technical idea of the present invention, and these equivalent changes are within the protection scope of the present invention.
Claims (5)
1. A websocket-based method for controlling an electronic class card is characterized in that the electronic class card and a server end in the method are built in the same local area network and are communicated with a third-party database through an external network, and the method comprises the following steps of
The client side handshakes to the server side to establish a connection channel, and the client side sends an instruction to the server side;
the server judges whether the command is a storage command or not, and if the command is the storage command, the server transmits the storage command to the appointed electronic class board;
the designated electronic class board uploads data to a third-party cloud database after receiving the storage instruction, sends a message to the server after uploading is successful, and the server acquires the uploaded storage path and then sends the acquired storage path to the client;
the server side judges whether the operation instruction is a storage instruction or not, performs second identification judgment, judges whether the operation instruction is sent by the client side, transmits the operation instruction to the electronic class board application layer for execution if the operation instruction is judged by the server side, and judges whether the operation instruction is repeatedly executed or not; if the repeated execution condition exists, returning a message to the server, and forbidding the client to send the instruction again;
if the server side judges that the operation instruction is not the operation instruction, judging the type of the inspection instruction;
and if the repeated execution does not exist, the electronic class card is transmitted to the application layer to be operated and executed.
2. The WebSocket-based electronic class board control method according to claim 1, wherein a unique device serial number is set in a single electronic class board, and before a client side handshakes a server side to establish a connection channel, the client side handshakes the server side to establish the connection channel and transmits and encrypts the transmission instruction through a WebSocket transmission protocol.
3. The websocket-based electronic class board control method according to claim 1, wherein after the designated electronic class board receives the storage instruction and uploads data to a third-party cloud database, a clearing program is set to clear the storage instruction which is not called in the third-party cloud database within three months.
4. The websocket-based electronic class board control method according to claim 2, wherein the transmission encryption method is as follows:
the method comprises the steps that end-to-end transmission of a plurality of electronic class cards and a server is achieved through a client of an electronic class card control system; an encryption algorithm is arranged in each electronic class board transmission module to encrypt transmission information;
the server side establishes an encryption system and an encryption system database corresponding to an encryption algorithm;
the equipment serial number and the instruction of a single electronic class board are encrypted by an encryption algorithm and then sent to a server to obtain a ciphertext,
after receiving the ciphertext, the server encrypts the ciphertext again;
the server encryption system carries out decryption inquiry on the ciphertext subjected to secondary encryption through the encryption system database;
if the matching is correct, the electronic class card is connected with the electronic class card through a handshake protocol.
5. The websocket-based electronic class board control method according to claim 3, wherein the third-party cloud database clearing program comprises the following steps:
sending a storage instruction to a server through a client control system, and sending the storage instruction to a third-party database after the storage instruction is forwarded to a designated electronic class board through the server;
before the appointed electronic class board sends the storage instruction to the third-party database, the server acquires a timestamp when the storage instruction is uploaded and a ciphertext of the serial number of the electronic class board equipment, and then archiving and recording the uploading operation;
the third-party database provides a temporary shield for the server side and hides an encryption key in the encryption system;
and the server clears the storage instruction in the third-party database according to the time stamp of the archived data and the ciphertext of the equipment serial number, and sends the time stamp data of the deleting instruction to the server for archiving, so that the data can be recovered at the later stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110614651.XA CN113497829B (en) | 2021-06-02 | 2021-06-02 | Method for controlling electronic ban card based on websocket |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110614651.XA CN113497829B (en) | 2021-06-02 | 2021-06-02 | Method for controlling electronic ban card based on websocket |
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| CN113497829A true CN113497829A (en) | 2021-10-12 |
| CN113497829B CN113497829B (en) | 2024-02-13 |
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