CN109067924A - Document transmission method and device - Google Patents
Document transmission method and device Download PDFInfo
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- CN109067924A CN109067924A CN201811156466.5A CN201811156466A CN109067924A CN 109067924 A CN109067924 A CN 109067924A CN 201811156466 A CN201811156466 A CN 201811156466A CN 109067924 A CN109067924 A CN 109067924A
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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
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
-
- 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
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/104—Peer-to-peer [P2P] networks
- H04L67/1074—Peer-to-peer [P2P] networks for supporting data block transmission mechanisms
- H04L67/1078—Resource delivery mechanisms
- H04L67/108—Resource delivery mechanisms characterised by resources being split in blocks or fragments
Abstract
The present invention relates to file transfer technology fields, specifically disclose a kind of document transmission method and device, document transmission method, comprising: execute splitting step in transmitting terminal: original document is split as several subfiles；A sequence number is distributed for each subfile, sequence number corresponding to different subfiles is different；Save the sequence number of each subfile；Each subfile configured with respective sequence number is sent to receiving end；Reconstitution steps are executed in receiving end: receiving each subfile；Sequence number corresponding to each subfile is obtained from the subfile；It is matched with the transmitting terminal and obtains the sequence number being stored in transmitting terminal；It compares the sequence number obtained from subfile and the subfile is recombinated from the received sequence number of transmitting terminal if the two matches.Document transmission method and device provided by the invention are able to achieve the safe and reliable file transmission of equipment room.
Description
Technical field
The present invention relates to file transfer technology field more particularly to a kind of document transmission methods and device.
Background technique
As network is using more and more extensive, the information exchange of equipment room is more and more frequent.Information is in transmittance process
It is mostly transmitted in clear text manner, partial document can add password when transmitting, but cipher mode is too simple, is cracked
Risk is larger.Therefore, it is necessary to a kind of document transmission methods, are able to achieve the safe and reliable file transmission of equipment room.
Summary of the invention
It is an advantage of the invention to provide a kind of document transmission methods, are able to achieve the safe and reliable file of equipment room
Transmission.
It is a further object of the invention to provide a kind of file transfer means, are able to achieve the safe and reliable text of equipment room
Part transmission.
To achieve these objectives, on the one hand, the present invention provides a kind of document transmission method, comprising:
Splitting step is executed in transmitting terminal:
Original document is split as several subfiles；
A sequence number is distributed for each subfile, sequence number corresponding to different subfiles is different；
Save the sequence number of each subfile；
Each subfile configured with respective sequence number is sent to receiving end；
Reconstitution steps are executed in receiving end:
Receive each subfile；
Sequence number corresponding to each subfile is obtained from the subfile；
It is matched with the transmitting terminal and obtains the sequence number being stored in transmitting terminal；
The sequence number that obtains from subfile is compared and from the received sequence number of transmitting terminal, if the two matching, to the son
File is recombinated.
Preferably, described the step of distributing a sequence number for each subfile, includes:
Each subfile is ranked up；
It is that each subfile distributes a sequence number relevant to the order of the subfile by Encryption Algorithm.
Preferably, described the step of recombinating to the subfile, includes:
According to the sequence number of each subfile parse each subfile corresponding to order；
It resequences according to resulting secondary each subfile of ordered pair is parsed；
Each subfile after sequence is recombinated.
Preferably, described the step of each subfile configured with respective sequence number is sent to receiving end, includes:
Each subfile configured with respective sequence number is compressed into the file packet of encryption；
The file packet is sent to receiving end.
Preferably, the step of each subfile of the reception includes:
Receive the file packet；
The file packet is decrypted by the key being pre-stored in the receiving end；
File packet after decryption is decompressed to obtain each subfile.
On the other hand, a kind of file transfer means are provided, for executing any of the above-described kind of document transmission method, including are used for
The detachment device of splitting step is executed in transmitting terminal and the reconstruction unit for executing reconstitution steps in receiving end；
The detachment device includes:
Module is split, for original document to be split as several subfiles；
Sequence number distribution module is connect with the fractionation module, for distributing a sequence number for each subfile；
Sequence number corresponding to different subfiles is different；
Backup module is connect with the sequence number distribution module, for obtaining each Ziwen from the sequence number distribution module
The sequence number of acquisition is simultaneously stored in transmitting terminal by the sequence number of part；
Sending module is connect with the sequence number distribution module and backup module respectively, for that will be configured with respective sequence
Each subfile of row number is sent to receiving end；
The reconstruction unit includes:
Receiving module is connect with the sending module, the subfile sent for receiving the sending module；
First ray number obtains module, connect with the receiving module, for from the subfile that receiving module receives
Obtain sequence number corresponding to each subfile；
Second sequence number obtains module, connect with the sending module, for matching with the transmitting terminal and obtaining preservation
Sequence number in backup module；
Comparison module, obtains module and the second sequence number with the First ray number respectively and obtains module and connect, is used for pair
The sequence number of module and the sequence number of the second sequence number acquisition module are obtained than First ray number；
Recombination module is connect with the comparison module, when the comparison module determines that First ray number obtains the sequence of module
When the sequence number that row number and the second sequence number obtain module matches, the recombination module is used to carry out the subfile weight
Group.
Preferably, the sequence number distribution module includes:
First sequencing unit is connect, for each subfile to be ranked up with the fractionation module；
Sequence number generation unit is connect with first sequencing unit, for being each Ziwen by Encryption Algorithm
Part distributes a sequence number relevant to the order of the subfile.
Preferably, the recombination module includes:
Resolution unit is connect with the comparison module, for parsing each subfile institute according to the sequence number of each subfile
Corresponding order；
Second sequencing unit is connect, for what is obtained according to resolution unit respectively with the resolution unit and receiving module
Order resequences to each subfile in receiving module；
Recomposition unit is connect with second sequencing unit, for recombinating to each subfile after sequence.
Preferably, the sending module includes:
Compression unit is connect with the sequence number distribution module, for that will be configured with each subfile of respective sequence number
It is compressed into the file packet of encryption；
Transmission unit is connect with the compression unit and receiving module respectively, resulting for that will handle through compression unit
File packet is sent to receiving end.
Preferably, the receiving module includes:
Receiving unit is connect with the transmission unit, for receiving the file packet；
Decryption unit is connect with the receiving unit, for obtaining the key being pre-stored in the receiving end and by being somebody's turn to do
Key decrypts the file packet；
Decompression units are connect with the decryption unit, for the file packet decompression after decrypting, obtain each Ziwen
Part.
The beneficial effects of the present invention are: a kind of document transmission method is provided, subfile and sequence number are transmitted separately to
Then receiving end is verified sequence number in receiving end, by way of online verification, can effectively identify that file is transmitting
Occur in the process situations such as being intercepted and distort, significantly increase the safety that information in internet environment is transmitted.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is the document transmission method block diagram that the embodiment of the present invention one provides；
Fig. 2 is the schematic diagram for the file transfer means that the embodiment of the present invention four provides.
In figure:
1, detachment device；
101, module is split；102, sequence number distribution module；1021, the first sequencing unit；1022, sequence number generates single
Member；103, backup module；104, sending module；1041, compression unit；1042, transmission unit；
2, reconstruction unit；
201, receiving module；2011, receiving unit；2012, decryption unit；2013, decompression units；202, First ray number
Obtain module；203, the second sequence number obtains module；204, comparison module；205, recombination module；2051, resolution unit；2052,
Second sequencing unit；2053, recomposition unit；206, alarm module.
Specific embodiment
To enable the purpose of the present invention, feature, advantage more obvious and understandable, implement below in conjunction with the present invention
Attached drawing in example, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that reality disclosed below
Applying example is only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
In the description of the present invention, it is to be understood that, when a component is considered as " connection " another component, it can
To be directly to another component or may be simultaneously present the component being centrally located.When a component is considered as " setting
Set " another component, it, which can be, is set up directly on another component or may be simultaneously present the component being centrally located.
In addition, the indicating positions such as term " length " " short " "inner" "outside" or positional relationship for the orientation that is shown based on attached drawing or
Person's positional relationship is merely for convenience of the description present invention, rather than the device or original part of indication or suggestion meaning must have this
Specific orientation is operated with specific orientation construction, should not be understood as limitation of the invention with this.
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
Embodiment one
As shown in Figure 1, including the following steps S10 and S20 the present embodiment provides a kind of document transmission method.
S10: splitting step is executed in transmitting terminal.
Specifically, splitting step is executed in transmitting terminal, is specifically included:
S101: original document is split as several subfiles.
Specifically, original document can be split according to customized rule, the size of each subfile can be identical,
It can also be different.
S102: a sequence number is distributed for each subfile, sequence number corresponding to different subfiles is different.
Specifically, the distribution of sequence number can follow certain rule or algorithm, can also be allocated at random.When
So, it can also artificially assign each subfile one unique sequence number；Such as an original document is split into three
After subfile, artificially define 10111, second subfiles of Serial No. of first subfile Serial No. 11011, the
Serial No. 10101 of three subfiles etc..
Preferably, in order to adapt to a fairly large number of situation of subfile, first each subfile can be ranked up, then led to
Crossing Encryption Algorithm is that each subfile distributes a sequence number relevant to the order of the subfile.Due to time of each subfile
Sequence is all uniquely, so can obtain using the order of subfile as independent variable using the sequence number of subfile as dependent variable
To unique sequence number.
S103: the sequence number of each subfile is saved.
Specifically, after step S102, each subfile carries sequence number information corresponding thereto, still
These sequence number informations are documented in subfile using subfile as carrier.The purpose of this step S103 is will own
Sequence number extracted from subfile and carry out concentrate save backup, obtained backup file only includes a series of sequence
Row number does not include subfile.
S104: each subfile configured with respective sequence number is sent to receiving end.
Specifically, in this present embodiment, each subfile is directly sent to receiving end in a random order.
S20: reconstitution steps are executed in receiving end.
Specifically, reconstitution steps are carried out in receiving end, are specifically included:
S201: each subfile is received.
Specifically, receiving end by it is wired or wirelessly with transmitting terminal realize communication connection, then receive from hair
Each subfile that sending end is sent.
S202: sequence number corresponding to each subfile is obtained from subfile.
Specifically, sequence number acquired in this step S202 is the sequence as entrained by the subfile in step S201
The quantity of row number and the quantity of subfile are identical.If in step S201, when transmitting terminal and receiving end are communicated, number of files
Transmission, which is interfered, perhaps destroys situations such as causing subfile to have increase or reduce, the sequence number obtained from subfile
Quantity correspondingly will increase or reduce.
S203: matching with transmitting terminal and obtains the sequence number being stored in transmitting terminal.
Specifically, receiving end first will issue pairing request to transmitting terminal, and what it is when transmitting terminal confirmation sending request is receiving end
Afterwards, just sequence number of the backup in transmitting terminal can be sent to receiving end.Since the sequence number in backup file is in subfile
It has just backed up before outgoing, there is no increasing, reduce or change, so the sequence number in backup file can be with
Standard as check and correction.
S204: the sequence number obtained from subfile is compared and from the received sequence number of transmitting terminal: if the two matches, antithetical phrase
File is recombinated；If the two mismatches, abandon recombinating, and issue " file loading error occurring " or " file is tampered " etc. mentioning
Show information.
Specifically, it is referred specifically to from the sequence number of subfile acquisition and from the received sequence numbers match of transmitting terminal: from subfile
The sequence number of acquisition is identical with from the received sequence number quantity of transmitting terminal, and each can be from the received sequence number of transmitting terminal
Identical person is found from the sequence number that subfile obtains.
Specifically, it if the two matches, when being recombinated to subfile, may comprise steps of:
1. according to the sequence number of each subfile parse each subfile corresponding to order；
2. resequencing according to resulting secondary each subfile of ordered pair is parsed；
3. being recombinated to each subfile after sequence.
In this present embodiment, the comparison process of sequence number can be carries out online, thus avoids the quilt in transmittance process
It intercepts and distorts.
Embodiment two
The present embodiment provides a kind of document transmission method, the difference with the document transmission method of embodiment one is:
In this present embodiment, step S104: each subfile configured with respective sequence number is sent to receiving end, is wrapped
It includes:
S1041: each subfile configured with respective sequence number is compressed into the file packet of encryption；
S1042: file packet is sent to receiving end.
Correspondingly, in this present embodiment, step S201: receiving each subfile, including
S2011: file packet is received；
S2012: file packet is decrypted by the key being pre-stored in receiving end；
S2013: it decompresses the file packet after decryption to obtain each subfile.
Specifically, each subfile is compressed into compressed package, then compressed package is transmitted again, can greatly reduce text
The quantity of part transmission, to reduce the risk of loading error occurring.Further, file packet is encrypted, dual add can be formed
Privacy protection greatly improves the safety of file transmission.
Embodiment three
The present embodiment provides a kind of for executing the file transfer means of the document transmission method of embodiment one, including is used for
The detachment device 1 of splitting step is executed in transmitting terminal and the reconstruction unit 2 for executing reconstitution steps in receiving end.
In this present embodiment, detachment device 1 includes: to split module 101, sequence number distribution module 102, backup module 103
With sending module 104.Module 101 is split to be used to original document being split as several subfiles.Sequence number distribution module 102 with tear open
Sub-module 101 connects, for distributing a sequence number for each subfile；Sequence number corresponding to different subfiles is different.
Backup module 103 is connect with sequence number distribution module 102, for obtaining the sequence of each subfile from sequence number distribution module 102
Number and the sequence number of acquisition is stored in transmitting terminal.Sending module 104 respectively with sequence number distribution module 102 and backup module
103 connections, for each subfile for being configured with respective sequence number to be sent to receiving end.
Reconstruction unit 2 obtains module 202 including receiving module 201, First ray number, the second sequence number obtains module 203,
Comparison module 204, recombination module 205 and alarm module 206.Receiving module 201 is connect with sending module 104, for receiving hair
The subfile for sending module 104 to send.First ray number obtains module 202 and connect with receiving module 201, is used for from receiving module
Sequence number corresponding to each subfile is obtained in 201 subfiles received.Second sequence number obtains module 203 and sending module
104 connections, for being matched with transmitting terminal and obtaining the sequence number being stored in backup module 103.Comparison module 204 is respectively with
One sequence number obtains module 202 and the second sequence number obtains module 203 and connects, and obtains module 202 for comparing First ray number
Sequence number and the second sequence number obtain module 203 sequence number.Recombination module 205 is connect with comparison module 204, when comparison mould
The sequence number that block 204 determines that First ray number obtains the sequence number of module 202 and the second sequence number obtains module 203 matches
When, recombination module 205 is for recombinating subfile.Alarm module 206 is connect with comparison module 204, when comparison module 204
When determining that the sequence number of First ray number acquisition module 202 and the second sequence number obtain the sequence numbers of module 203, warning
Module 206 is for issuing the prompt informations such as " file loading error occurring " or " file is tampered ".
Preferably, sequence number distribution module 102 includes the first sequencing unit 1021 and sequence number generation unit 1022.First
Sequencing unit 1021 is connect with module 101 is split, for each subfile to be ranked up.Sequence number generation unit 1022 and first
Sequencing unit 1021 connects, for being that each subfile distributes a sequence relevant to the order of the subfile by Encryption Algorithm
Row number.
Correspondingly, recombination module 205 includes resolution unit 2051, the second sequencing unit 2052 and recomposition unit 2053.Solution
Analysis unit 2051 is connect with comparison module 204, for according to the sequence number of each subfile parse each subfile corresponding to it is secondary
Sequence.Second sequencing unit 2052 is connect with resolution unit 2051 and receiving module 201 respectively, for being obtained according to resolution unit 2051
To order resequence to each subfile in receiving module 201.Recomposition unit 2053 and the second sequencing unit 2052
Connection, for being recombinated to each subfile after sequence.
Example IV
As shown in Fig. 2, the file that the present embodiment provides a kind of for executing the document transmission method of embodiment two transmits dress
It sets, the difference with the file transfer means of embodiment three is:
In this present embodiment, sending module 104 includes compression unit 1041 and transmission unit 1042.Compression unit 1041 with
Sequence number distribution module 102 connects, for each subfile for being configured with respective sequence number to be compressed into the file packet of encryption.Hair
Unit 1042 is sent to connect respectively with compression unit 1041 and receiving module 201, it is resulting for that will be handled through compression unit 1041
File packet is sent to receiving end.
Correspondingly, receiving module 201 includes receiving unit 2011, decryption unit 2012 and decompression units 2013.It receives single
Member 2011 is connect with transmission unit 1042, for receiving file packet.Decryption unit 2012 is connect with receiving unit 2011, for obtaining
It takes the key being pre-stored in receiving end and file packet is decrypted by the key.Decompression units 2013 are connect with decryption unit 2012,
For the file packet decompression after decrypting, each subfile is obtained.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of document transmission method characterized by comprising
Splitting step is executed in transmitting terminal:
Original document is split as several subfiles；
A sequence number is distributed for each subfile, sequence number corresponding to different subfiles is different；
Save the sequence number of each subfile；
Each subfile configured with respective sequence number is sent to receiving end；
Reconstitution steps are executed in receiving end:
Receive each subfile；
Sequence number corresponding to each subfile is obtained from the subfile；
It is matched with the transmitting terminal and obtains the sequence number being stored in transmitting terminal；
The sequence number that obtains from subfile is compared and from the received sequence number of transmitting terminal, if the two matching, to the subfile
It is recombinated.
2. document transmission method according to claim 1, which is characterized in that described to distribute one for each subfile
The step of sequence number includes:
Each subfile is ranked up；
It is that each subfile distributes a sequence number relevant to the order of the subfile by Encryption Algorithm.
3. document transmission method according to claim 2, which is characterized in that the step recombinated to the subfile
Suddenly include:
According to the sequence number of each subfile parse each subfile corresponding to order；
It resequences according to resulting secondary each subfile of ordered pair is parsed；
Each subfile after sequence is recombinated.
4. document transmission method according to claim 1, which is characterized in that described to be configured with each of respective sequence number
Subfile is sent to the step of receiving end and includes:
Each subfile configured with respective sequence number is compressed into the file packet of encryption；
The file packet is sent to receiving end.
5. document transmission method according to claim 4, which is characterized in that the step of each subfile of the reception wraps
It includes:
Receive the file packet；
The file packet is decrypted by the key being pre-stored in the receiving end；
File packet after decryption is decompressed to obtain each subfile.
6. a kind of file transfer means require 1~5 described in any item document transmission methods for perform claim, feature exists
In including the detachment device (1) for executing splitting step in transmitting terminal and the recombination for executing reconstitution steps in receiving end
Device (2)；
The detachment device (1) includes:
It splits module (101), for original document to be split as several subfiles；
Sequence number distribution module (102) is connect with the fractionation module (101), for distributing one for each subfile
Sequence number；Sequence number corresponding to different subfiles is different；
Backup module (103) is connect with the sequence number distribution module (102), is used for from the sequence number distribution module (102)
It obtains the sequence number of each subfile and the sequence number of acquisition is stored in transmitting terminal；
Sending module (104) is connect with the sequence number distribution module (102) and backup module (103) respectively, for that will configure
There is each subfile of respective sequence number to be sent to receiving end；
The reconstruction unit (2) includes:
Receiving module (201) is connect with the sending module (104), the Ziwen sent for receiving the sending module (104)
Part；
First ray number obtains module (202), connect with the receiving module (201), for receiving from receiving module (201)
Subfile in obtain sequence number corresponding to each subfile；
Second sequence number obtains module (203), connect with the sending module (104), for matching and obtaining with the transmitting terminal
Going bail for, there are the sequence numbers in backup module (103)；
Comparison module (204) obtains module (202) with the First ray number respectively and the second sequence number obtains module (203)
Connection obtains the sequence number of module (202) and the sequence of the second sequence number acquisition module (203) for comparing First ray number
Number；
Recombination module (205) is connect with the comparison module (204), when the comparison module (204) determine that First ray number obtains
When the sequence number that the sequence number of modulus block (202) and the second sequence number obtain module (203) matches, the recombination module
(205) for being recombinated to the subfile.
7. file transfer means according to claim 6, which is characterized in that the sequence number distribution module (102) includes:
First sequencing unit (1021) is connect, for each subfile to be ranked up with the fractionation module (101)；
Sequence number generation unit (1022) is connect with first sequencing unit (1021), for being each by Encryption Algorithm
The subfile distributes a sequence number relevant to the order of the subfile.
8. file transfer means according to claim 7, which is characterized in that the recombination module (205) includes:
Resolution unit (2051) is connect with the comparison module (204), for parsing each son according to the sequence number of each subfile
Order corresponding to file；
Second sequencing unit (2052) is connect with the resolution unit (2051) and receiving module (201) respectively, for according to solution
The order that analysis unit (2051) obtains resequences to each subfile in receiving module (201)；
Recomposition unit (2053) is connect with second sequencing unit (2052), for carrying out weight to each subfile after sequence
Group.
9. file transfer means according to claim 6, which is characterized in that the sending module (104) includes:
Compression unit (1041) is connect, for that will be configured with each of respective sequence number with the sequence number distribution module (102)
Subfile is compressed into the file packet of encryption；
Transmission unit (1042) is connect with the compression unit (1041) and receiving module (201) respectively, single for that will be compressed
First (1041) handle resulting file packet and are sent to receiving end.
10. file transfer means according to claim 9, which is characterized in that the receiving module (201) includes:
Receiving unit (2011) is connect with the transmission unit (1042), for receiving the file packet；
Decryption unit (2012) is connect, for obtaining the key being pre-stored in the receiving end with the receiving unit (2011)
And the file packet is decrypted by the key；
Decompression units (2013) are connect with the decryption unit (2012), for the file packet decompression after decrypting, obtain each institute
State subfile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811156466.5A CN109067924A (en) | 2018-09-26 | 2018-09-26 | Document transmission method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811156466.5A CN109067924A (en) | 2018-09-26 | 2018-09-26 | Document transmission method and device |
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| CN109067924A true CN109067924A (en) | 2018-12-21 |
Family
ID=64767118
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811156466.5A Pending CN109067924A (en) | 2018-09-26 | 2018-09-26 | Document transmission method and device |
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| CN111565166A (en) * | 2019-12-09 | 2020-08-21 | 武汉空心科技有限公司 | File transmission method of work platform for packet |
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Application publication date: 20181221 |
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