CN106686078B - Data transmission method and device - Google Patents
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- CN106686078B CN106686078B CN201611219660.4A CN201611219660A CN106686078B CN 106686078 B CN106686078 B CN 106686078B CN 201611219660 A CN201611219660 A CN 201611219660A CN 106686078 B CN106686078 B CN 106686078B
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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]
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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
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
Abstract
The invention discloses a data transmission method and a data transmission device. Wherein, the method comprises the following steps: acquiring a to-be-sent issued file; splitting the issued file into a plurality of subfiles, wherein the data volume of each subfile accords with the transmission data volume of a preset issuing protocol; and sequentially sending the plurality of subfiles to the terminal, wherein the terminal splices the plurality of received subfiles into a delivered file. The invention solves the technical problem that the issued file can not be issued normally because the data volume of the issued file is larger than the transmission data volume of the issuing protocol.
Description
Technical Field
The invention relates to the field of data transmission, in particular to a data transmission method and device.
Background
With the development of scientific technology, the internet of vehicles system becomes the main development direction of the future motor vehicle network. The car networking system utilizes advanced sensing technology, network technology, computing technology, control technology, intelligent technology and safety technology to comprehensively sense roads and traffic, realizes interaction of large-range and large-capacity data among a plurality of systems, and provides technical support for establishing a real-time, accurate, efficient and safe traffic transportation comprehensive management and control system. According to statistics, by the end of 2013, the reserved quantity of domestic private car markets is 1.37 hundred million, the proportion of private cars supporting an OBD standard interface exceeds 90%, the existing file issuing mode agreed by the 808 protocol is too simple, the supported files are limited, particularly, the issued files supported by the 808 protocol can only be smaller than 1024 bytes, and the issued files with the data quantity larger than 1024 bytes cannot be normally issued.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a data transmission method and a data transmission device, which at least solve the technical problem that a delivered file cannot be normally delivered due to the fact that the data volume of the delivered file is larger than the transmission data volume of a delivery protocol.
According to an aspect of an embodiment of the present invention, there is provided a data transmission method, including: acquiring a to-be-sent issued file; splitting the issued file into a plurality of subfiles, wherein the data volume of each subfile accords with the transmission data volume of a preset issued protocol; and sequentially sending the plurality of subfiles to a terminal, wherein the terminal splices the received plurality of subfiles into the issued file.
Further, sequentially sending the plurality of subfiles to the terminal includes: sending a file issuing notification to the terminal, wherein the file issuing notification comprises attribute information and verification information of an issued target subfile; receiving first information sent by the terminal in response to the file delivery notification, wherein the first information includes indication information or request information, the indication information is used for indicating that the terminal finishes receiving the target subfile according to the attribute information and the verification information, the request information is used for requesting downloading of the target subfile, and the request is sent when the terminal fails to verify the attribute information and the verification information; and sending the target subfile to the terminal according to the received first information.
Further, when the first information is request information, the sending the target subfile to the terminal according to the received first information includes: extracting task information and file information in the request information, wherein the file information comprises a file identifier and initial position information of a data segment requested to be downloaded; judging whether the task information is consistent with the task of issuing the target subfile, judging whether the file identifier is consistent with the information of the target subfile, and judging whether the initial position information of the data segment requested to be downloaded exceeds the file size of the target subfile; if the task information is judged to be inconsistent with the task of issuing the target subfile or the file identification is judged to be inconsistent with the information of the target subfile, or judging that the initial position information exceeds the file size of the target subfile, sending a data packet downloading request response to the terminal, wherein, when the task information is judged to be inconsistent with the task of issuing the target subfile, the download request packet reply includes first information indicating that the task IDs do not match, when the file identification is judged to be inconsistent with the information of the target subfile, the request downloading data packet response comprises second information used for indicating that the file ID is not matched, when the initial position information is judged to exceed the file size of the target subfile, the request downloading data packet response comprises third information used for indicating that the initial position of the request data is out of range; if the task information is judged to be consistent with the task of issuing the target subfile, the file identifier is judged to be consistent with the information of the target subfile, and the initial position information is judged not to exceed the file size of the target subfile, the file is read from the offset position of the initial byte of the data segment requested to be downloaded in the issuing file, and the read file is filled in a data packet response requested to be downloaded and sent to the terminal.
Further, after filling the read file in a download request packet response and sending the download request packet response to the terminal, the method further includes: receiving a receiving completion indication sent by the terminal, wherein the receiving completion indication is used for indicating that the terminal completes receiving the target subfile; and sending a general notification to the terminal according to the receiving completion indication, wherein the general notification is used for indicating the end of the file delivery.
Further, before sequentially sending the plurality of subfiles to the terminal, the method further includes: detecting whether the terminal is on-line; if the terminal is on-line, sending the file issuing notification to send the plurality of sub-files to the terminal; if the terminal is not on-line, the file issuing notification is saved, and the plurality of sub-files are sent to the terminal after the terminal is on-line.
Further, after sending the file delivery notification to the terminal, the method further includes: the terminal verifies whether the attribute information of the target subfile is consistent with the attribute information indicated by the file issuing notification; if yes, the terminal checks whether the check code of the target subfile is consistent with the check information indicated by the file issuing notification; if the check code of the target subfile is consistent with the check information indicated by the file delivery notification, the terminal sends the indication information; and if the attribute information of the target subfile is not consistent with the attribute information indicated by the file delivery notification, or the check code of the target subfile is not consistent with the check information indicated by the file delivery notification, the terminal sends the request information.
Further, before receiving the reception completion indication sent by the terminal, the method further includes: the terminal judges whether the data enlightenment position and the data length in the request downloading data packet response are consistent with those in the request information; if the received data is consistent with the received data, the terminal sends the receiving completion indication; if not, the terminal sends the request information again.
According to another aspect of the embodiments of the present invention, there is also provided a data transmission apparatus, including: the device comprises an acquisition unit, a sending unit and a sending unit, wherein the acquisition unit is used for acquiring a sent down file to be sent; the splitting unit is used for splitting the issued file into a plurality of subfiles, wherein the data volume of each subfile accords with the transmission data volume of a preset issuing protocol; and the first sending unit is used for sequentially sending the plurality of subfiles to a terminal, wherein the terminal splices the received plurality of subfiles into the delivered file.
Further, the first transmitting unit includes: the first sending module is used for sending a file issuing notification to the terminal, wherein the file issuing notification comprises attribute information and verification information of an issued target subfile; a receiving module, configured to receive first information sent by the terminal in response to the file delivery notification, where the first information includes indication information or request information, the indication information is used to indicate that the terminal completes receiving the target subfile according to the attribute information and the verification information, the request information is used to request downloading of the target subfile, and the request is sent when the terminal fails to verify the attribute information and the verification information; and the second sending module is used for sending the target subfile to the terminal according to the received first information.
Further, the second sending module includes: the extraction submodule is used for extracting task information and file information in the request information when the first information is the request information, wherein the file information comprises a file identifier and initial position information of a data segment requested to be downloaded; a first judging sub-module, configured to judge whether the task information is consistent with a task of issuing the target sub-file, judge whether the file identifier is consistent with information of the target sub-file, and judge whether the initial location information of the data segment requested to be downloaded exceeds a file size of the target sub-file; a response submodule, configured to send a response to the terminal for requesting downloading of a data packet, where the response includes first information, second information, or third information, when a determination result of the first determination submodule is inconsistent, where the first information is used to indicate that a task ID is not matched, the second information is used to indicate that a file ID is not matched, and the third information is used to indicate that a start position of the requested data is out of bounds; and the first sending submodule is used for reading the file from the offset position of the initial byte of the data fragment requested to be downloaded in the issued file when the judgment results of the first judging submodule are consistent, filling the read file below the response of the data packet requested to be downloaded and sending the file to the terminal.
Further, the second sending module further includes: a receiving submodule, configured to receive a reception completion instruction sent by the terminal after the read file is filled in a download request packet response and is sent to the terminal, where the reception completion instruction is used to instruct the terminal to complete receiving the target subfile; and the second sending submodule is used for sending a general notification to the terminal according to the receiving completion indication, wherein the general notification is used for indicating the end of file sending.
Further, the above apparatus further comprises: a detecting unit, configured to detect whether the terminal is online before the plurality of subfiles are sequentially sent to the terminal; a second sending unit, configured to send the file delivery notification to send the plurality of subfiles to the terminal if the terminal is online; and the storage unit is used for storing the file issuing notification under the condition that the terminal is not on line, and sending the plurality of sub-files to the terminal after waiting for the terminal to be on line.
Further, the first sending unit further includes: a first verification module, configured to verify, by the terminal, whether attribute information of the target subfile is consistent with the attribute information indicated by the file delivery notification after the file delivery notification is sent to the terminal; a second verification module, configured to verify, by the terminal, whether a check code of the target sub-file is consistent with the check information indicated by the file delivery notification if the check code of the target sub-file is consistent with the check information indicated by the file delivery notification; a third sending module, configured to enable the terminal to send the indication information when the check code of the target sub-file is consistent with the check information indicated by the file delivery notification; a fourth sending module, configured to, if the attribute information of the target subfile is not consistent with the attribute information indicated by the file delivery notification, or if the check code of the target subfile is not consistent with the check information indicated by the file delivery notification, enable the terminal to send the request information.
Further, the second sending module further includes: a second judgment sub-module, configured to enable the terminal to judge whether a data enlightenment position and a data length in the download request packet response are consistent with those in the request information before receiving a reception completion instruction sent by the terminal; a third sending submodule, configured to enable the terminal to send the receiving completion instruction in a case of consistency; and a fourth transmission submodule for causing the terminal to retransmit the request message if the request message is inconsistent with the request message.
In the embodiment of the invention, the method of splitting the issued file into the plurality of subfiles to enable the data volume of the subfiles to be in accordance with the transmission data volume of the issued protocol is adopted, the plurality of subfiles are sent to the terminal, and the plurality of subfiles are spliced into the issued file by the terminal.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of an alternative method of data transmission according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an alternative data transmission apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
In accordance with an embodiment of the present invention, there is provided a data transmission method embodiment, it should be noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
Fig. 1 is a flowchart of an alternative data transmission method according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
step S102, acquiring a to-be-sent down file.
In the embodiment of the invention, the Internet of vehicles platform is responsible for the interaction of large-scale and large-capacity data among a plurality of systems, and when the issued file is sent to the terminal, the issued file to be sent is firstly obtained.
And step S104, splitting the issued file into a plurality of subfiles, wherein the data volume of each subfile accords with the transmission data volume of a preset issuing protocol.
In the embodiment of the invention, the Internet of vehicles platform sends the issued file to the terminal, and the issued file is required to conform to the issued protocol, wherein the issued file must be smaller than the transmission data volume supported by the issued protocol, otherwise, the issued file cannot be normally transmitted. As a preferred implementation manner of the embodiment of the present invention, a distributed file with a data volume larger than a transmission data volume supported by a distributed protocol is split into a plurality of subfiles, where the data volume of each subfile is smaller than the data volume of the distributed file, the sum of the data volumes of the plurality of subfiles is equal to the distributed file, and each subfile of the assistant conforms to the transmission data volume supported by the distributed protocol, so as to ensure that each subfile can be frequently sent.
And step S106, sequentially sending a plurality of subfiles to the terminal, wherein the terminal splices the received subfiles into an issued file.
In the embodiment of the invention, the plurality of the sub-files obtained by splitting are sent to the terminal through the platform, and the terminal splices the plurality of the sub-files after receiving the plurality of the sub-files to obtain the issued file, thereby realizing the normal issuing of the issued file with the data volume larger than the transmission data volume supported by the issuing protocol.
In the embodiment of the invention, the method of splitting the issued file into the plurality of subfiles to enable the data volume of the subfiles to be in accordance with the transmission data volume of the issued protocol is adopted, the plurality of subfiles are sent to the terminal, and the plurality of subfiles are spliced into the issued file by the terminal.
Optionally, sequentially sending the plurality of subfiles to the terminal includes: sending a file issuing notification to a terminal, wherein the file issuing notification comprises attribute information and verification information of an issued target subfile; receiving first information sent by a terminal response file issuing notification, wherein the first information comprises indication information or request information, the indication information is used for indicating the terminal to complete receiving of the target subfile according to the attribute information and the verification information, the request information is used for requesting downloading of the target subfile, and the request is sent out when the terminal fails to verify the attribute information and the verification information; and sending the target subfile to the terminal according to the received first information.
As a preferred implementation manner of the embodiment of the present invention, when sending a plurality of divided subfiles to a terminal, a platform first sends a file delivery notification to the terminal, where the file delivery notification includes attribute information and verification information of a target subfile to be delivered, where the attribute information of the target subfile may include: the file ID, the file length, the file type, the storage path of the file in the platform, the file name of the file in the platform, the storage path of the file in the terminal, the file name of the file in the terminal, and the like, and the verification information of the target file may include: file CRC-32 check code, file version number, terminal manufacturer code, terminal hardware version number, etc. The terminal responds to the file delivery notification, if the terminal finishes receiving the target subfile, the terminal sends indication information of the finished receiving of the target subfile, and if the terminal fails to verify the attribute information and the verification information, the terminal sends request information for requesting downloading of the target subfile. And after receiving the response information sent by the terminal, sending the target subfile to the terminal according to the specific content of the response information.
Optionally, when the first information is request information, sending the target subfile to the terminal according to the received first information includes: extracting task information and file information in the request information, wherein the file information comprises a file identifier and initial position information of a data segment requested to be downloaded; judging whether the task information is consistent with the task of issuing the target subfile, judging whether the file identifier is consistent with the information of the target subfile, and judging whether the initial position information of the data segment requested to be downloaded exceeds the file size of the target subfile; if the task information is judged to be inconsistent with the task of issuing the target subfile, or the file identifier is judged to be inconsistent with the information of the target subfile, or the initial position information is judged to exceed the file size of the target subfile, sending a request download data packet response to the terminal, wherein the request download data packet response comprises first information used for indicating that the task ID is not matched when the task information is judged to be inconsistent with the task of issuing the target subfile, the request download data packet response comprises second information used for indicating that the file ID is not matched when the file identifier is judged to be inconsistent with the information of the target subfile, and the request download data packet response comprises third information used for indicating that the initial position of the request data is out of bounds when the initial position information is judged to exceed the file size of the target subfile; if the task information is judged to be consistent with the task of issuing the target subfile, the file identifier is judged to be consistent with the information of the target subfile, and the initial position information is judged not to exceed the file size of the target subfile, the file is read from the offset position of the initial byte of the data fragment requested to be downloaded in the issuing file, and the read file is filled below the request downloading data packet response and is sent to the terminal.
As a preferred implementation manner of the embodiment of the present invention, if the response information received by the platform is request information requesting to download the target subfile, the response requesting to download the data packet is sent to the terminal by determining information included in the request information. Specifically, the request information includes task information and file information, where the file information includes: the file identification, the offset position of the first byte of the data segment requested to be downloaded in the next file and the byte length of the data segment requested to be downloaded, wherein the offset position of the first byte of the data segment requested to be downloaded in the next file represents the starting position of the data segment requested to be downloaded. By judging the information included in the request information, if the task information is judged to be inconsistent with the task of issuing the target subfile, sending a request downloading data packet response to the terminal, wherein the response state is 'no matching of task ID'; if the task information is consistent with the task of issuing the target subfile, judging whether the file identifier is consistent with the information of the target subfile or not, if the file identifier is not consistent with the information of the target subfile, sending a response of requesting to download a data packet to the terminal, wherein the response state is 'no matching of file ID'; if the file identification is consistent with the information of the target subfile, judging whether the offset position of the first byte of the data fragment requested to be downloaded in the next file exceeds the file size of the target subfile, and if the offset position of the first byte of the data fragment requested to be downloaded in the next file exceeds the file size of the target subfile, sending a data packet response requested to be downloaded to the terminal, wherein the response state is' data exceeding initial position crossing. And if the offset position of the first byte of the data fragment requested to be downloaded in the downlink file does not exceed the file size of the target subfile, reading the file from the offset position of the first byte of the data fragment requested to be downloaded in the downlink file, and sending a request downloading data packet response to the terminal, wherein the request downloading data packet response comprises the read file.
Optionally, after filling the read file in a download request packet response and sending the download request packet response to the terminal, the method further includes: receiving a receiving completion indication sent by the terminal, wherein the receiving completion indication is used for indicating the terminal to complete receiving the target subfile; and sending a general notification to the terminal according to the receiving completion indication, wherein the general notification is used for indicating the end of the file delivery.
As a preferred implementation manner of the embodiment of the present invention, after the receiving end completes receiving the target subfile, the receiving end sends a receiving completion indication to the platform, and the platform receives the receiving completion indication sent by the terminal, and sends a general notification to the terminal according to the receiving completion indication, which indicates that the file delivery is finished.
Optionally, before sequentially sending the plurality of subfiles to the terminal, the method further includes: detecting whether the terminal is on-line; if the terminal is on line, sending a file issuing notification to send a plurality of subfiles to the terminal; if the terminal is not on line, the file is saved, the notice is issued, and a plurality of subfiles are sent to the terminal after the terminal is on line.
As a preferred implementation manner of the embodiment of the present invention, before the platform sends the target sub-file to the terminal, the platform detects whether the terminal is online, if the terminal is online, the platform sends a file delivery notification to the terminal, if the terminal is not online, the platform saves the notification of the file delivery, and after the terminal is online, the platform sends the file delivery notification to the terminal.
Optionally, after sending the file delivery notification to the terminal, the method further includes: the terminal verifies whether the attribute information of the target subfile is consistent with the attribute information indicated by the file issuing notification; if the verification codes are consistent, the terminal verifies whether the verification codes of the target subfiles are consistent with the verification information indicated by the file issuing notification; if the check code of the target subfile is consistent with the check information indicated by the file issuing notification, the terminal sends indication information; and if the attribute information of the target subfile is inconsistent with the attribute information indicated by the file delivery notification, or the check code of the target subfile is inconsistent with the check information indicated by the file delivery notification, the terminal sends the request information.
As a preferred implementation manner of the embodiment of the present invention, after receiving a file delivery notification sent by a platform, a terminal verifies whether a target subfile exists, and whether attribute information of the target subfile is consistent with attribute information included in the file delivery notification, for example: the file downloading method comprises the steps that whether a file ID, a file length, a file type, a file name, a file storage path and the like are consistent or not, if the attribute information of the file is consistent with the file attribute information of a target subfile included in a file issuing notice or not, whether a check code of the target subfile is consistent with the check information included in the file issuing notice or not is checked, wherein the file check code can be a file CRC-32 check code, if the file check code is consistent with the check information included in the file issuing notice, indication information that the target subfile is received is sent to a platform, and if the attribute information of the target subfile is inconsistent with the attribute information included in the issuing notice or the check code of the target subfile is inconsistent with the check information included in the file issuing notice, request information for requesting to download.
Optionally, before receiving the reception completion indication sent by the terminal, the method further includes: the terminal judges whether the data initial position and the data length in the response of the data packet requesting to be downloaded are consistent with those in the request information; if the two are consistent, the terminal sends a receiving completion indication; if not, the terminal sends the request message again.
As a preferred implementation manner of the embodiment of the present invention, after receiving the response of the request to download the data packet, the requesting terminal determines that the data start position and the data length in the response of the request to download the data packet are consistent with those in the request information of the terminal, if so, stores the file data content in the response of the request to download the data packet, and sends the indication information of completion of reception to the platform, and if not, sends the request information to the platform again to request to download the target subfile.
Example 2
According to another aspect of the embodiments of the present invention, there is also provided a data transmission apparatus, and fig. 2 is a schematic diagram of an alternative data transmission apparatus according to the embodiments of the present invention, as shown in fig. 2, the apparatus includes:
the obtaining unit 210 is configured to obtain a to-be-sent down file.
In the embodiment of the present invention, the car networking platform is responsible for interaction of large-scale and large-capacity data among multiple systems, and when sending a delivered file to a terminal, the obtaining unit 210 first obtains the delivered file to be sent.
The splitting unit 220 is configured to split the delivered file into a plurality of subfiles, where a data size of each subfile corresponds to a transmission data size of a preset delivery protocol.
In the embodiment of the invention, the Internet of vehicles platform sends the issued file to the terminal, and the issued file is required to conform to the issued protocol, wherein the issued file must be smaller than the transmission data volume supported by the issued protocol, otherwise, the issued file cannot be normally transmitted. As a preferred implementation manner of the embodiment of the present invention, the splitting unit 220 splits the issued file, whose data size is larger than the transmission data size supported by the issued protocol, into a plurality of subfiles, where the data size of each subfile is smaller than the data size of the issued file, the sum of the data sizes of the plurality of subfiles is equal to the issued file, and each subfile is in accordance with the transmission data size supported by the issued protocol, so as to ensure that each subfile can be frequently sent.
The first sending unit 230 is configured to send the multiple subfiles to the terminal in sequence, where the terminal splices the received multiple subfiles into an issued file.
In the embodiment of the present invention, the first sending unit 230 sends the plurality of split subfiles to the terminal, and after receiving the plurality of subfiles, the terminal splices the plurality of subfiles to obtain an issued file, thereby implementing normal issuing of the issued file with a data volume greater than a transmission data volume supported by an issued protocol.
In the embodiment of the invention, the method of splitting the issued file into the plurality of subfiles to enable the data volume of the subfiles to be in accordance with the transmission data volume of the issued protocol is adopted, the plurality of subfiles are sent to the terminal, and the plurality of subfiles are spliced into the issued file by the terminal.
Optionally, the first sending unit includes: the first sending module is used for sending a file issuing notification to the terminal, wherein the file issuing notification comprises attribute information and verification information of an issued target subfile; the receiving module is used for receiving first information sent by a terminal response file issuing notification, wherein the first information comprises indicating information or request information, the indicating information is used for indicating the terminal to complete receiving of the target subfile according to the attribute information and the verification information, the request information is used for requesting downloading of the target subfile, and the request is sent out when the terminal fails to verify the attribute information and the verification information; and the second sending module is used for sending the target subfile to the terminal according to the received first information.
As a preferred implementation manner of the embodiment of the present invention, when the platform sends the plurality of divided subfiles to the terminal, the first sending module first sends a file delivery notification to the terminal, where the file delivery notification includes attribute information and verification information of a target subfile to be delivered, where the attribute information of the target subfile may include: the file ID, the file length, the file type, the storage path of the file in the platform, the file name of the file in the platform, the storage path of the file in the terminal, the file name of the file in the terminal, and the like, and the verification information of the target file may include: file CRC-32 check code, file version number, terminal manufacturer code, terminal hardware version number, etc. The terminal responds to the file delivery notification, if the terminal finishes receiving the target subfile, the terminal sends indication information of the finished receiving of the target subfile, and if the terminal fails to verify the attribute information and the verification information, the terminal sends request information for requesting downloading of the target subfile. And after the receiving module receives the response information sent by the terminal, the second sending module sends the target subfile to the terminal according to the specific content of the response information.
Optionally, the second sending module includes: the extraction submodule is used for extracting task information and file information in the request information when the first information comprises the request information, wherein the file information comprises a file identifier and initial position information of a data segment requested to be downloaded; the first judgment sub-module is used for judging whether the task information is consistent with the task of issuing the target subfile, judging whether the file identifier is consistent with the information of the target subfile and judging whether the initial position information of the data segment requested to be downloaded exceeds the file size of the target subfile; a response submodule, configured to send a response to the terminal for requesting downloading of a data packet, where the response includes first information, second information, or third information, when a determination result of the first determination submodule is inconsistent, where the first information is used to indicate that a task ID is not matched, the second information is used to indicate that a file ID is not matched, and the third information is used to indicate that a start position of the requested data is out of bounds; and the first sending submodule is used for reading the file from the offset position of the initial byte of the data fragment requested to be downloaded in the issued file when the judgment results of the first judging submodule are consistent, filling the read file below the response of the data packet requested to be downloaded and sending the file to the terminal.
As a preferred implementation manner of the embodiment of the present invention, if the response information received by the platform is request information requesting to download the target subfile, the first determining sub-module determines information included in the request information, and further sends a response requesting to download the data packet to the terminal. Specifically, the request information includes task information and file information, where the file information includes: the file identification, the offset position of the first byte of the data segment requested to be downloaded in the next file and the byte length of the data segment requested to be downloaded, wherein the offset position of the first byte of the data segment requested to be downloaded in the next file represents the starting position of the data segment requested to be downloaded. Judging the information included in the request information through a first judging submodule, if the task information is judged to be inconsistent with the task of issuing the target subfile, sending a request downloading data packet response to the terminal by a response submodule, wherein the response state is 'no task ID matching'; if the task information is consistent with the task of issuing the target subfile, the first judging submodule judges whether the file identifier is consistent with the information of the target subfile or not, and if the file identifier is not consistent with the information of the target subfile, the response submodule sends a request downloading data packet response to the terminal, wherein the response state is 'no file ID matching'; if the file identification is consistent with the information of the target subfile, the first judgment sub-module judges whether the offset position of the first byte of the data fragment requested to be downloaded in the next file exceeds the file size of the target subfile, and if the offset position of the first byte of the data fragment requested to be downloaded in the next file exceeds the file size of the target subfile, the response sub-module sends a response of the data packet requested to be downloaded to the terminal, wherein the response state is' data request initial position crossing. And if the offset position of the first byte of the data segment requested to be downloaded in the downlink file does not exceed the file size of the target subfile, reading the file from the offset position of the first byte of the data segment requested to be downloaded in the downlink file, and filling the read file into a request download data packet response by the first sending submodule so as to send the request download data packet response to the terminal, wherein the request download data packet response comprises the read file.
Optionally, the second sending module further includes: the receiving submodule is used for receiving a receiving completion indication sent by the terminal after the read file is filled below a request downloading data packet response and is sent to the terminal, and the receiving completion indication is used for indicating the terminal to complete receiving the target subfile; and the second sending submodule is used for sending a general notification to the terminal according to the receiving completion indication, wherein the general notification is used for indicating the end of the file sending.
As a preferred implementation of the embodiment of the present invention, after the receiving end finishes receiving the target subfile, the receiving end module sends a receiving end instruction to the platform, the receiving submodule receives the receiving end instruction sent by the terminal, and the second sending submodule sends a general notification to the terminal according to the receiving end instruction, indicating that the file delivery is finished.
Optionally, the apparatus further comprises: the detection unit is used for detecting whether the terminal is on line or not before the plurality of subfiles are sequentially sent to the terminal; the second sending unit is used for sending a file issuing notification to send a plurality of subfiles to the terminal under the condition that the terminal is on line; and the storage unit is used for storing the file issuing notification under the condition that the terminal is not on line, and sending a plurality of sub-files to the terminal after the terminal is on line.
As a preferred implementation manner of the embodiment of the present invention, before the platform sends the target subfile to the terminal, the detection unit may detect whether the terminal is online, if the terminal is online, the second sending unit sends a file delivery notification to the terminal, if the terminal is not online, the storage unit stores the notification of the file delivery, and after the terminal is online, the file delivery notification is sent to the terminal.
Optionally, the first sending unit further includes: the first verification module is used for verifying whether the attribute information of the target subfile is consistent with the attribute information indicated by the file delivery notification or not by the terminal after the file delivery notification is sent to the terminal; the second verification module is used for verifying whether the verification code of the target subfile is consistent with the verification information indicated by the file issuing notification or not by the terminal under the condition of consistency; the third sending module is used for enabling the terminal to send the indication information under the condition that the check code of the target subfile is consistent with the check information of the file issuing notification indication; and the fourth sending module is used for enabling the terminal to send the request information under the condition that the attribute information of the target subfile is inconsistent with the attribute information indicated by the file delivery notification, or the check code of the target subfile is inconsistent with the check information indicated by the file delivery notification.
As a preferred implementation manner of the embodiment of the present invention, after the terminal receives the file delivery notification sent by the platform, the first verification module may verify whether the target subfile exists, and whether the attribute information of the target subfile is consistent with the attribute information included in the file delivery notification, for example: the file system comprises a first verification module, a second verification module, a third sending module and a fourth sending module, wherein the first verification module is used for verifying whether a file ID, a file length, a file type, a file name, a file storage path and the like are consistent, if attribute information of the file ID is consistent with file attribute information of a target subfile included in a file delivery notice, the second verification module is used for verifying whether a check code of the target subfile is consistent with the check information included in the file delivery notice, the file check code can be a file CRC-32 check code, if the file check code is consistent, the third sending module sends indication information that the target subfile is received to a platform, and if the attribute information of the target subfile is inconsistent with the attribute information included in the delivery notice or the check code of the target subfile is inconsistent with the check information included in the file delivery notice, the fourth.
Optionally, the second sending module further includes: a second judgment submodule, configured to enable the terminal to judge whether a data enlightenment position and data length in a response of a request to download a data packet are consistent with those in the request information before receiving a reception completion indication sent by the terminal; the third sending submodule is used for enabling the terminal to send a receiving completion instruction under the condition of consistency; and the fourth sending submodule is used for enabling the terminal to send the request information again under the condition of inconsistency.
As a preferred implementation manner of the embodiment of the present invention, after the request terminal receives the download request packet response, the second determining submodule determines that the data start position and the data length in the download request packet response are consistent with those in the terminal request information, if so, the file data content in the download request packet response is stored, the third sending submodule sends receiving completion indication information to the platform, and if not, the fourth sending submodule sends the request information to the platform again to request to download the target subfile.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (12)
1. A method of data transmission, comprising:
acquiring a to-be-sent issued file;
splitting the issued file into a plurality of subfiles, wherein the data volume of each subfile conforms to the transmission data volume of a preset issuing protocol;
sequentially sending the plurality of subfiles to a terminal, wherein the terminal splices the plurality of received subfiles into the issued file;
wherein sequentially sending the plurality of subfiles to the terminal comprises: sending a file issuing notification to the terminal, wherein the file issuing notification comprises attribute information and verification information of an issued target subfile; receiving first information sent by the terminal in response to the file delivery notification, wherein the first information comprises indication information or request information, the indication information is used for indicating the terminal to complete receiving the target subfile according to the attribute information and the verification information, the request information is used for requesting downloading of the target subfile, and the request is sent out when the terminal fails to verify the attribute information and the verification information; sending the target subfile to the terminal according to the received first information; wherein the attribute information of the target subfile comprises at least one of: the verification information of the target subfile comprises at least one of the following information: file CRC-32 check code, file version number, terminal manufacturer code and terminal hardware version number;
when the first information is request information, sending the target subfile to the terminal according to the received first information comprises:
extracting task information and file information in the request information, wherein the file information comprises a file identifier and initial position information of a data segment requested to be downloaded;
judging whether the task information is consistent with the task of issuing the target subfile, judging whether the file identifier is consistent with the information of the target subfile, and judging whether the initial position information of the data segment requested to be downloaded exceeds the file size of the target subfile;
and according to the judgment result, determining to send a response of requesting to download the data packet to the terminal.
2. The method of claim 1, wherein determining that a response is sent to the terminal requesting downloading of the data packet according to the determination result comprises:
if the task information is judged to be inconsistent with the task of issuing the target subfile or the file identification is judged to be inconsistent with the information of the target subfile, or judging that the initial position information exceeds the file size of the target subfile, sending a data packet downloading request response to the terminal, wherein, when the task information is judged to be inconsistent with the task of issuing the target subfile, the request download packet reply includes first information indicating that the task IDs do not match, when the file identification is judged to be inconsistent with the information of the target subfile, the request downloading data packet response comprises second information used for indicating that the file ID is not matched, when the initial position information is judged to exceed the file size of the target subfile, the request downloading data packet response comprises third information used for indicating that the initial position of the request data is out of range;
and if the task information is judged to be consistent with the task of issuing the target subfile, the file identifier is judged to be consistent with the information of the target subfile, and the initial position information is judged not to exceed the file size of the target subfile, reading the file from the offset position of the initial byte of the data fragment requested to be downloaded in the issued file, filling the read file in a data packet request to be downloaded, and sending the data packet request to the terminal.
3. The method as claimed in claim 2, wherein after the step of sending the read file to the terminal in response to the download request packet, the method further comprises:
receiving a receiving completion indication sent by the terminal, wherein the receiving completion indication is used for indicating the terminal to complete receiving the target subfile;
and sending a general notification to the terminal according to the receiving completion indication, wherein the general notification is used for indicating the end of the file delivery.
4. The method of claim 1, wherein before sequentially sending the plurality of subfiles to the terminal, the method further comprises:
detecting whether the terminal is on-line;
if the terminal is on line, sending the file issuing notification to send the plurality of subfiles to the terminal;
and if the terminal is not on-line, the file issuing notification is saved, and the plurality of subfiles are sent to the terminal after the terminal is on-line.
5. The method of claim 1, wherein after sending the file delivery notification to the terminal, the method further comprises:
the terminal verifies whether the attribute information of the target subfile is consistent with the attribute information indicated by the file issuing notification;
if yes, the terminal checks whether the check code of the target subfile is consistent with the check information indicated by the file issuing notification;
if the check code of the target subfile is consistent with the check information indicated by the file issuing notification, the terminal sends the indication information;
and if the attribute information of the target subfile is inconsistent with the attribute information indicated by the file delivery notification, or the check code of the target subfile is inconsistent with the check information indicated by the file delivery notification, the terminal sends the request information.
6. The method according to claim 3, wherein before receiving the reception completion indication sent by the terminal, the method further comprises:
the terminal judges whether the data initial position and the data length in the request downloading data packet response are consistent with those in the request information;
if the received data is consistent with the received data, the terminal sends the receiving completion indication;
and if the request information is inconsistent with the request information, the terminal sends the request information again.
7. A data transmission apparatus, comprising:
the device comprises an acquisition unit, a sending unit and a sending unit, wherein the acquisition unit is used for acquiring a sent down file to be sent;
the splitting unit is used for splitting the issued file into a plurality of subfiles, wherein the data volume of each subfile accords with the transmission data volume of a preset issuing protocol;
the first sending unit is used for sequentially sending the plurality of subfiles to a terminal, wherein the terminal splices the plurality of received subfiles into the issued file;
wherein the first transmitting unit includes: the first sending module is used for sending a file issuing notification to the terminal, wherein the file issuing notification comprises attribute information and verification information of an issued target subfile; a receiving module, configured to receive first information sent by the terminal in response to the file delivery notification, where the first information includes indication information or request information, the indication information is used to indicate that the terminal completes receiving the target subfile according to the attribute information and the verification information, the request information is used to request downloading of the target subfile, and the request is sent when the terminal fails to verify the attribute information and the verification information; a second sending module, configured to send the target subfile to the terminal according to the received first information; wherein the attribute information of the target subfile comprises at least one of: the verification information of the target subfile comprises at least one of the following information: file CRC-32 check code, file version number, terminal manufacturer code and terminal hardware version number;
the second sending module includes:
the extraction submodule is used for extracting task information and file information in the request information when the first information is the request information, wherein the file information comprises a file identifier and initial position information of a data segment requested to be downloaded;
the first judgment sub-module is used for judging whether the task information is consistent with the task of issuing the target subfile, judging whether the file identifier is consistent with the information of the target subfile, and judging whether the initial position information of the data segment requested to be downloaded exceeds the file size of the target subfile;
and the second sending module is used for determining to send a response of requesting to download the data packet to the terminal according to the judgment result.
8. The apparatus of claim 7, wherein the second sending module comprises:
a response submodule, configured to send a response to the terminal for requesting downloading of a data packet, where the response includes first information, second information, or third information, when a determination result of the first determination submodule is inconsistent, where the first information is used to indicate that a task ID is not matched, the second information is used to indicate that a file ID is not matched, and the third information is used to indicate that a start position of the requested data is out of bounds;
and the first sending submodule is used for reading the file from the offset position of the initial byte of the data fragment requested to be downloaded in the issued file when the judgment results of the first judging submodule are consistent, filling the read file below the response of the data packet requested to be downloaded and sending the file to the terminal.
9. The apparatus of claim 8, wherein the second sending module further comprises:
the receiving submodule is used for receiving a receiving completion indication sent by the terminal after the read file is filled in a request downloading data packet response and is sent to the terminal, and the receiving completion indication is used for indicating the terminal to complete receiving the target subfile;
and the second sending submodule is used for sending a general notification to the terminal according to the receiving completion indication, wherein the general notification is used for indicating the end of the file sending.
10. The apparatus of claim 7, further comprising:
the detection unit is used for detecting whether the terminal is online or not before the plurality of subfiles are sequentially sent to the terminal;
a second sending unit, configured to send the file delivery notification to send the multiple subfiles to the terminal when the terminal is online;
and the storage unit is used for storing the file issuing notification under the condition that the terminal is not on line, and sending the plurality of subfiles to the terminal after waiting for the terminal to be on line.
11. The apparatus of claim 7, wherein the first sending unit further comprises:
the first verification module is used for verifying whether the attribute information of the target subfile is consistent with the attribute information indicated by the file delivery notification by the terminal after the file delivery notification is sent to the terminal;
the second verification module is used for verifying whether the check code of the target subfile is consistent with the check information indicated by the file issuing notification by the terminal under the condition of consistency;
a third sending module, configured to enable the terminal to send the indication information when the check code of the target subfile is consistent with the check information indicated by the file delivery notification;
a fourth sending module, configured to enable the terminal to send the request information when the attribute information of the target subfile is inconsistent with the attribute information indicated by the file delivery notification, or when the check code of the target subfile is inconsistent with the check information indicated by the file delivery notification.
12. The apparatus of claim 9, wherein the second sending module further comprises:
a second judging submodule, configured to enable the terminal to judge whether a data start position and a data length in the request download data packet response are consistent with those in the request information before receiving a reception completion indication sent by the terminal;
a third sending submodule, configured to enable the terminal to send the receiving completion indication in a case of consistency;
and the fourth sending submodule is used for enabling the terminal to send the request information again under the condition of inconsistency.
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| CN109525542A (en) * | 2017-09-20 | 2019-03-26 | 中兴通讯股份有限公司 | Data reconstruction method, transmitting/receiving means and computer readable storage medium |
| CN107809423A (en) * | 2017-10-20 | 2018-03-16 | 国信嘉宁数据技术有限公司 | A kind of electronic evidence data transmission method, system and equipment |
| CN109451030B (en) * | 2018-11-19 | 2021-11-19 | 视联动力信息技术股份有限公司 | Method and system for downloading video network file |
| CN112883427A (en) * | 2019-11-29 | 2021-06-01 | 航天信息股份有限公司 | Method and device for detecting integrity of file |
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