CN113438226B - Message generating and analyzing method, device and system based on hybrid transmission protocol - Google Patents
Message generating and analyzing method, device and system based on hybrid transmission protocol Download PDFInfo
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- CN113438226B CN113438226B CN202110698103.XA CN202110698103A CN113438226B CN 113438226 B CN113438226 B CN 113438226B CN 202110698103 A CN202110698103 A CN 202110698103A CN 113438226 B CN113438226 B CN 113438226B
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- 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
- H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0808—Diagnosing performance data
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- 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
- H04L69/22—Parsing or analysis of headers
Abstract
The invention provides a message generating and analyzing method, device and system, based on a hybrid transmission protocol, wherein the format of the hybrid transmission protocol defined message comprises a header field, a JSON data length field, a JSON data field, a binary data field, a check bit field corresponding to the binary data field, a total check bit field, a tail field, byte size occupied by the JSON data length field, byte size occupied by the check bit field and byte size occupied by the total check bit field which are sequentially arranged.
Description
Technical Field
The invention belongs to the technical field of data interaction, and particularly relates to a message generating and analyzing method, device and system based on a hybrid transmission protocol.
Background
In the data interaction scenario, transmission is typically through JSON or binary.
The JSON transmission has the advantages of strong universality, simplicity and comprehension, simple interaction, mature library files and codes, mature tools capable of reading and writing, and the defect that basic plaintext is transmitted, so that a third party can easily read and steal transmission contents, the JSON transmission is only suitable for transmitting data of characters, numbers, Boolean types and the like and is not suitable for transmitting binary data and files, if the formats of the binary data and the files must be converted in transmission, the transmission size is 2 times of the actual effective data length, and loss is caused to transmission time and transmission flow.
Binary transmission has the advantages that the method is suitable for transmitting binary files or binary data, for example, in an interactive scene of an upper computer and a lower computer, the binary format transmission is generally adopted, similar formats of a protocol for setting a header, a length, data, verification and a tail are used for transmission, the transmission efficiency is high, the flow is saved, certain encryption characteristics are provided, and the defects of poor readability and poor universality are caused.
Disclosure of Invention
Based on this, aiming at the technical problem, a message generating and analyzing method, device and system based on a hybrid transmission protocol are provided.
In order to solve the technical problems, the invention adopts the following technical scheme:
on one hand, a method for generating a message based on a hybrid transmission protocol is provided, wherein the format of the hybrid transmission protocol definition message includes a header field, a JSON data length field, a JSON data field, a binary data field, a check bit field corresponding to the binary data field, a total check bit field, a trailer field, and the byte size occupied by the JSON data length field, the byte size occupied by the check bit field, and the byte size occupied by the total check bit field, which are set in sequence, the method includes:
filling a header field to generate a header;
converting each second data to be transmitted into binary data, determining the JSON data length according to each first data to be transmitted and the length information of each binary data, and filling the JSON data length in a JSON data length field;
filling the length information of each first data and each binary data to be transmitted into a JSON data field according to a JSON format;
filling each binary data into a binary data field, and calculating a corresponding check value to fill a check bit field;
calculating a total check value and filling the total check value into a total check bit field;
and filling a tail field to generate a tail.
On the other hand, a method for parsing a message based on a hybrid transport protocol is provided, wherein the format of the hybrid transport protocol definition message includes a header field, a JSON data length field, a JSON data field, a binary data field, a check bit field corresponding to the binary data field, a total check bit field, a trailer field, and a byte size occupied by the JSON data length field, a byte size occupied by the check bit field, and a byte size occupied by the total check bit field, which are sequentially set, and the method includes:
intercepting effective information between the header and the trailer of the message according to the header and the trailer of the message;
acquiring a total check value from a total check bit field of the effective information, and checking the effective information through the total check value;
after the verification is successful, acquiring the JSON data length from the JSON data length field of the effective information according to the byte size occupied by the JSON data length field, and acquiring the JSON data field from the effective information according to the JSON data length;
acquiring first data in a JSON format and length information in the JSON format from the JSON data field;
and acquiring corresponding binary data from the effective information through the length information of each binary data, and verifying the binary data through corresponding verification values.
In another aspect, an electronic device is provided, wherein the electronic device is configured to execute the hybrid transmission protocol-based message generation method or the hybrid transmission protocol-based message parsing method.
On the other hand, the data interaction system is characterized by comprising a lower computer and an upper computer;
the lower computer is configured to:
executing the message generation method based on the hybrid transmission protocol, generating a message, and sending the message to the upper computer;
receiving a message sent by the upper computer, executing the message analysis method based on the hybrid transmission protocol, and analyzing the message;
the upper computer is configured to:
receiving a message sent by the lower computer, executing the message analysis method based on the hybrid transmission protocol, and analyzing the message;
and executing the message generation method based on the hybrid transmission protocol to generate a message and sending the message to the lower computer.
The invention is based on a hybrid transmission protocol, combines the advantages of JSON and binary transmission, has strong universality, is suitable for various data interaction scenes, has high transmission efficiency and effectively saves flow.
Drawings
The invention is described in detail below with reference to the following figures and detailed description:
fig. 1 is a flowchart of a message generation method based on a hybrid transmission protocol according to the present invention;
FIG. 2 is a flow chart of a message parsing method based on a hybrid transmission protocol according to the present invention;
FIG. 3 is a diagram illustrating a message format according to the present invention;
fig. 4 is a schematic structural diagram of a data interaction system according to the present invention.
Detailed Description
As shown in fig. 3, the format of the hybrid transport protocol defined packet includes a header field, a JSON data length field, a JSON data field, a binary data field, a check bit field corresponding to the binary data field, a total check bit field, a trailer field, a byte size occupied by the JSON data length field, a byte size occupied by the check bit field, and a byte size occupied by the total check bit field, which are sequentially set.
In this embodiment, the binary data field and the check bit field corresponding to the binary data field are both multiple, and as shown in fig. 3, a corresponding check bit field is set behind each binary data field.
The header is a binary header, the trailer is a binary trailer, the JSON data length field is in a binary format, the size of occupied bytes is 4 bytes, the check bit field is in a binary format, the size of occupied bytes is 1 byte, the total check bit field is in a binary format, and the size of occupied bytes is 1 byte.
As shown in fig. 1, an embodiment of the present specification provides a method for generating a packet based on a hybrid transmission protocol, including:
s101, filling a header field to generate a header.
Wherein the header may be a preset character of a preset length.
S102, converting each second data to be transmitted into binary data, determining the JSON data length according to each first data to be transmitted and the length information of each binary data, and filling the JSON data length in the JSON data length field.
The JSON data length is variable, and is determined according to the lengths of all data needing to be transmitted in the JSON format, namely the length of each first data after being converted into the JSON format is calculated, the length information of each binary data after being converted into the JSON format is calculated, and finally the JSON data length is determined through addition.
S103, filling the length information of each first data and each binary data to be transmitted into a JSON data field according to a JSON format.
Each first data is filled into a JSON data field according to the JSON format, see JSON attribute 1 and JSON attribute 2.. JSON attribute N in fig. 3, and the length information of each binary data is filled into a JSON data field according to the JSON format, see the length information of binary data a and the length information of binary data B.. the length information of binary data X in fig. 3.
Wherein, the JSON format refers to a key-value format, such as "firstname": "Joan" stands for firstname ═ Joan ", and it should be noted that this is only an example of the JSON format and does not limit the first data.
The JSON data length represents the length of the JSON data field, when the message is analyzed, the JSON data field can be intercepted from the effective information between the header and the trailer according to the JSON data length, and then JSON analysis is carried out, so that the length information of JSON attribute + binary data is obtained.
The first data refers to data suitable for being transmitted in a JSON format, such as character, number or Boolean data, and for upper and lower computer scenes, the first data refers to data such as device version information, device numbers, software version numbers and the like.
The second data refers to data suitable for binary transmission, such as data needing encryption and the like, and for upper and lower computer scenes, the second data refers to data such as firmware HEX file information, CAN data information and the like.
Since the length information of the binary data (i.e. the byte size occupied by the binary data field) belongs to the digital type and the different binary data fields can be distinguished only by depending on the length information of the binary data when the message is analyzed, the length information of the binary data needs to be conveniently analyzed and read, therefore, the length information of the binary data is also filled into the JSON data field in the JSON format, so that the length information of the binary data is transmitted in the JSON format.
And S104, filling each binary data into a binary data field, and calculating a corresponding check value to fill a check bit field.
The binary data may be calculated by using a checksum, parity, or CRC check, and the like, so as to obtain a check value, which is only an example of a check method, and is not limited to the check method, and other check methods may also be used.
And S105, calculating a total check value and filling the total check value into a total check bit field.
The total check value may be obtained by calculating all data in a check manner such as sum check, parity check, or CRC check, which is only an example of the check manner, and is not limited to the check manner, and other check manners may also be used.
And S106, filling a tail field to generate a tail.
The trailer may be a preset character with a preset length.
The header, the trailer, the length information, the occupied byte size and the check value can be quickly packaged and are not easy to stick.
The message generation method of the embodiment fills first data suitable for being transmitted in a JSON format into a JSON data field of a message, fills second data suitable for being transmitted in a binary system into a binary data field of the message, and fills length information of each binary data into the JSON data field according to the JSON format.
As shown in fig. 2, based on the same inventive concept, an embodiment of the present specification further provides a message parsing method based on a hybrid transmission protocol, which is used for parsing a message generated by the message generating method based on the hybrid transmission protocol, and includes:
s201, according to the header and the trailer of the message, intercepting effective information between the header and the trailer.
The valid information comprises a JSON data length field, a JSON data field, a binary data field, a check bit field corresponding to the binary data field and a total check bit field.
S202, obtaining a total check value from the total check bit field of the effective information, and checking the effective information through the total check value.
Since the byte size occupied by the total parity bit field is known and the position in the message is known, which data is the total parity bit field can be determined in the valid information.
During checking, a sum check, a parity check, a CRC check, or other check methods may be used to calculate all data to obtain a total check value, and the total check value is compared with the total check value obtained from the total check bit field, so as to perform checking.
S203, after the verification is successful, the JSON data length is obtained from the JSON data length field of the effective information according to the byte size occupied by the JSON data length field, and the JSON data field is obtained from the effective information according to the JSON data length.
The JSON data length represents the length of the JSON data field, and the JSON data field can be intercepted from the effective information between the header and the trailer according to the JSON data length, and then JSON parsing is performed, so that the length information of JSON attribute + binary data is obtained, see fig. 3.
S204, acquiring the first data in the JSON format and the length information in the JSON format from the JSON data field.
Since the data acquired from the JSON data field are all in the key-value form, the first data and the length information can be distinguished by the key.
S205, obtaining corresponding binary data from the effective information through the length information of each binary data, and verifying the binary data through corresponding verification values.
During the check, the binary data may be calculated by using a check method such as a sum check, a parity check, or a CRC check, and the check value is compared with the check value obtained from the corresponding check bit field, so as to perform the check.
Based on the same inventive concept, an embodiment of the present specification further provides an electronic device, where the electronic device is configured to execute the steps according to various exemplary embodiments of the present invention described in the above-mentioned hybrid transmission protocol-based message generation method section of the present specification, or execute the steps according to various exemplary embodiments of the present invention described in the above-mentioned hybrid transmission protocol-based message parsing method section of the present specification, and details of the steps are not repeated here.
Based on the same inventive concept, as shown in fig. 4, an embodiment of the present specification further provides a data interaction system, which includes a lower computer 11 and an upper computer 12.
Wherein the lower computer 11 is configured to:
the steps according to the various exemplary embodiments of the present invention described in the above-mentioned hybrid transmission protocol-based message generation method section of this specification are executed to generate a message, and the message is sent to the upper computer 12.
Receiving a message sent by the upper computer 12, executing the steps according to various exemplary embodiments of the present invention described in the above-mentioned message parsing method based on the hybrid transmission protocol part of this specification, and parsing the message.
The upper computer 12 is configured to:
receiving a message sent by the lower computer 11, executing the steps according to various exemplary embodiments of the present invention described in the above-mentioned message parsing method part based on the hybrid transmission protocol of this specification, and parsing the message;
executing the steps according to the various exemplary embodiments of the present invention described in the above-mentioned method for generating a packet based on a hybrid transmission protocol section of this specification, a packet is generated, and the packet is sent to the lower computer 11.
The data interaction system is based on a hybrid transmission protocol, combines the advantages of JSON and binary transmission, has strong universality and is suitable for various data interaction scenes.
The lower computer 11 and the upper computer 12 can be a lower computer and an upper computer of the vehicle diagnosis device respectively, the lower computer 11 can be connected with an OBD (on-board diagnostics) port 21 of the vehicle 20, the upper computer can be a smart phone or a tablet personal computer and the like, and the upper computer is connected with the lower computer in a wireless (such as a USB (universal serial bus) line) or wired (wifi, Bluetooth and the like) mode.
In an application scenario of vehicle diagnosis, the upper computer 12 generates a diagnosis instruction (message) and sends the diagnosis instruction to the lower computer 11, the lower computer 11 analyzes the diagnosis instruction and sends the diagnosis instruction to a vehicle, vehicle feedback information is sent to the lower computer 11, the lower computer 11 generates a message according to the vehicle feedback information and sends the message to the upper computer 12, and the upper computer 12 analyzes the message to perform vehicle diagnosis.
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
However, those skilled in the art should realize that the above embodiments are illustrative only and not limiting to the present invention, and that changes and modifications to the above described embodiments are intended to fall within the scope of the appended claims, provided they fall within the true spirit of the present invention.
Claims (10)
1. A message generating method based on hybrid transmission protocol is characterized in that the format of the hybrid transmission protocol definition message comprises a header field, a JSON data length field, a JSON data field, a binary data field, a check bit field corresponding to the binary data field, a total check bit field, a tail field, the byte size occupied by the JSON data length field, the byte size occupied by the check bit field and the byte size occupied by the total check bit field which are sequentially arranged, and the method comprises the following steps:
filling a header field to generate a header;
converting each second data to be transmitted into binary data, determining the JSON data length according to each first data to be transmitted and the length information of each binary data, and filling the JSON data length in a JSON data length field;
filling the length information of each first data and each binary data to be transmitted into a JSON data field according to a JSON format;
filling each binary data into a binary data field, and calculating a corresponding check value to fill a check bit field;
calculating a total check value and filling the total check value into a total check bit field;
and filling a tail field to generate a tail.
2. The method according to claim 1, wherein there are a plurality of binary data fields and check bit fields corresponding to the binary data fields.
3. The message generation method according to claim 2, wherein a corresponding check bit field is set after each binary data field.
4. The message generation method according to claim 1 or 2, wherein the header is a binary header, the trailer is a binary trailer, the JSON data length field is in a binary format, the byte size occupied by the JSON data length field is 4 bytes, the check bit field is in a binary format, the byte size occupied by the check bit field is 1 byte, the total check bit field is in a binary format, and the byte size occupied by the total check bit field is 1 byte.
5. A message parsing method based on hybrid transmission protocol is characterized in that the format of the hybrid transmission protocol definition message comprises a header field, a JSON data length field, a JSON data field, a binary data field, a check bit field corresponding to the binary data field, a total check bit field, a tail field, the byte size occupied by the JSON data length field, the byte size occupied by the check bit field and the byte size occupied by the total check bit field which are sequentially arranged, and the method comprises the following steps:
intercepting effective information between the header and the trailer of the message according to the header and the trailer of the message;
acquiring a total check value from a total check bit field of the effective information, and checking the effective information through the total check value;
after the verification is successful, acquiring the JSON data length from the JSON data length field of the effective information according to the byte size occupied by the JSON data length field, and acquiring the JSON data field from the effective information according to the JSON data length;
acquiring first data in a JSON format and length information of the JSON format from the JSON data field;
and acquiring corresponding binary data from the effective information through the length information of each binary data, and verifying the binary data through corresponding verification values.
6. The message parsing method according to claim 5, wherein there are a plurality of binary data fields and check bit fields corresponding to the binary data fields.
7. The message parsing method according to claim 6, wherein a corresponding check bit field is set after each binary data field.
8. The message parsing method according to claim 5 or 7, wherein the header is a binary header, the trailer is a binary trailer, the JSON data length field is in a binary format, the byte size occupied by the JSON data length field is 4 bytes, the check bit field is in a binary format, the byte size occupied by the check bit field is 1 byte, and the total check bit field is in a binary format, and the byte size occupied by the total check bit field is 1 byte.
9. An electronic device, characterized in that the device is configured to perform a hybrid transport protocol based message generation method according to any one of claims 1 to 4 or to perform a hybrid transport protocol based message parsing method according to any one of claims 5 to 8.
10. A data interaction system is characterized by comprising a lower computer and an upper computer;
the lower computer is configured to:
executing the message generation method based on the hybrid transmission protocol according to any one of claims 1 to 4, generating a message, and sending the message to the upper computer;
receiving a message sent by the upper computer, executing the message analysis method based on the hybrid transmission protocol according to any one of claims 5 to 8, and analyzing the message;
the upper computer is configured to:
receiving a message sent by the lower computer, executing a message analysis method based on a hybrid transmission protocol according to any one of claims 5-8, and analyzing the message;
executing the message generation method based on the hybrid transmission protocol according to any one of claims 1 to 4, generating a message, and sending the message to the lower computer.
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