CN103442037A - Method for achieving multithreading breakpoint upload of oversized file based on FTP - Google Patents
Method for achieving multithreading breakpoint upload of oversized file based on FTP Download PDFInfo
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Abstract
The invention discloses a method for achieving multithreading breakpoint upload of an oversized file based on the FTP. The method comprises the following steps that an FTP client terminal establishes multithreading connection to achieve multithreading upload of the file; the file is divided into a plurality of blocks which are distributed to different threads for upload, and when a file block is uploaded, a new file is distributed to the thread; the operation of uploading a transmitted data part again is avoided by uploading the part not yet uploaded of each file block through multithreads in a concurrent mode; the FTP client terminal establishes a thread in addition, and the thread is specially used for recording temporary configuration file information in real time. The method for achieving multithreading breakpoint upload of the oversized file based on the FTP is applied to FTP upload service of the oversized file, and the time required by uploading the oversized file to the FTP server can be effectively shortened through a method of multithreading concurrent upload. The data part already transmitted is prevented from being uploaded again, so that transmission amount is reduced, and the time for uploading the oversized file to the FTP server is further saved.
Description
Technical field
The present invention relates to the Internet file host-host protocol application, particularly a kind of method that realizes super large file multithreading breaking point uploading based on File Transfer Protocol.
Background technology
The FTP(file transfer protocol (FTP)) be that current network is served one of important application, it has realized reliably and effectively transmitting the function of data; Simultaneously, FTP has another outstanding advantage: as long as carry out the system of file transfer, all support File Transfer Protocol, just can carry out easily file transfer between dissimilar computer, make the user can be not influenced because of the difference of all kinds of Hosts file accumulator systems.Therefore, FTP is the upper widely used service of Internet always.
Ftp server provides the bi-directional service of file upload and download for the client, and current application and research more stress on the download technology of FTP, for the research of uploading file, relate to very few, especially to the researches of the effective uploading file of super large file.In the practical application of modern network, often need transmission with GB, or even the TB super large file that is unit, as multimedia file etc.On the super large file, the height of transfer efficiency the application such as is shared for the network of multimedia file and is seemed more and more important.But, because these file sizes are huge, transmitting procedure length consuming time, the upload procedure interruption that the most easily meets accident, the frequent operation that causes file again to be uploaded, greatly affected sharing of data.As can be seen here, the research of super large file uploading file is for promoting that network applications evolve has great meaning.
Traditional FTP adopts single-threaded upload file, and uploading speed is slow, simultaneously, once the interruption that meets accident just needs the total data of upload file again, has greatly affected the efficiency of uploading.Purpose of the present invention is exactly to upload the efficiency of super large file in order to improve FTP, has realized a kind of method of supporting the FTP upload file of multithread breakpoint continued transmission function.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art with not enough, provide a kind of and support multithreading to upload the ftp file method for uploading with the breakpoint transmission function simultaneously, can effectively improve the efficiency of FTP upload file.
Technical scheme of the present invention is: when the user needs upload file to arrive ftp server, the number of threads N used in the time of can selecting to upload, the data that client and server is set up N thread connect, Divide File is become to M piece (M>=N), the different masses of N the concurrent transmission same file of thread is to server, simultaneously, set up corresponding provisional configuration file (during for breaking point uploading in client, obtain the progress of uploading of each piece), when M piece of file all after end of transmission, server end is according to former documentary order, file is reassembled into to the original document form, client is deleted corresponding provisional configuration file, finally complete uploading of file.In the file upload procedure, the situation that accidental interruption occurs, again after connecting with server end, client can obtain the information of which part of having uploaded file from corresponding provisional configuration file, then adopt the mode of multithread breakpoint continued transmission, only need to continue the part that transmission is not uploaded, can complete the uploading operation of whole file.Purpose of the present invention realizes by following concrete technical scheme:
Realize the method for super large file multithreading breaking point uploading based on File Transfer Protocol, comprise the steps:
S1, in the situation that do not revise original File Transfer Protocol, set up by ftp client the method that multithreading connects, realize that the multithreading of file is uploaded;
In S2, multithreading upload operation, ftp client is set up a plurality of the connection by multithreading with the ftp server end, connect and comprise that data connect and control connection, size and Thread Count according to upload file, become a plurality of by the file classifying rationally, distributes to different threads and upload, after certain thread has been uploaded a blocks of files, the new blocks of files of reallocating is given this thread, has guaranteed that all threads are all in active state, completes expeditiously file and uploads task;
In S3, breaking point uploading operation, at first read breakpoint information from the provisional configuration file, the starting position of each blocks of files while resuming for arranging, then the take steps method of S2, utilize multi-thread concurrent to upload the part that each blocks of files is not yet uploaded, avoided again uploading the operation of the data division transmitted, reduced volume of transmitted data, shortened upload consuming time;
S4, in the upload operation of step S2 and step S3, ftp client is set up a thread in addition, is specifically designed to real time record provisional configuration fileinfo, guarantees to meet accident while interrupting, starting the breaking point uploading operation can be from correct document location.
Preferably, in step S2, also be included in client and set up corresponding provisional configuration file, the fileinfo needed while being used for the real time record breaking point uploading; When all pieces of file end of transmission all, after file successfully uploads to ftp server, automatically delete the provisional configuration file of client.
Preferably, in step S2, the classifying rationally method of file is: the size of piecemeal is the integral multiple of the data buffer zone of setting, and minimum is 1 times; The size of piecemeal is not less than the actual Thread Count connected, and each thread can be assigned to the task of uploading.
Preferably, the breaking point uploading process still can be used multithreading, and number of threads different when uploading for the first time can be set.
Preferably, the information of provisional configuration file including has: whether the side-play amount of the fullpath that file is deposited at the ftp server end, the size of file, the piece number that file is divided into, the size of piece, every BOB(beginning of block) position, the size that every has been uploaded, every have uploaded complete and transformat.
Preferably, after the upload operation of step S2 and step S3 indication is successfully completed, client is deleted the provisional configuration file automatically, saves disk space.
The present invention has following advantage and effect with respect to prior art:
The present invention is applicable to the FTP upload service of super large file, and the method for uploading by multi-thread concurrent can effectively shorten and upload the super large file time required to ftp server; By the method for breaking point uploading, avoid again uploading the data division transmitted, reduced transmission quantity, further saved and uploaded the time of super large file to ftp server.
The accompanying drawing explanation
Fig. 1 is File Transfer Protocol model schematic diagram;
Fig. 2 is that the applied ftp client file of the present invention multithreading is uploaded the realization flow schematic diagram;
Fig. 3 is the applied ftp client file of the present invention multithreading breaking point uploading realization flow schematic diagram.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
The File Transfer Protocol model is a kind of typical C/S(client-server) structure.When ftp client and ftp server end carry out file transfer, set up two kinds of connections---a kind of is control connection, and a kind of is that data connect.Control connection is the channel of client and server communication, and the response message that the FTP operational order that client is sent and server return all communicates by control connection; It is the channel that client and server carries out file transfer that data connect, and uploads or the download file data all realize by the data connecting channel.Fig. 1 is shown in by File Transfer Protocol model schematic diagram.
Under aggressive mode or Passive Mode at ftp server, it is all the same using principle of the present invention, therefore, only take Passive Mode herein as example, and embodiments of the present invention are described in detail:
1, ftp client uses the present invention to carry out the implementation process that ftp file uploads to be described in detail as follows:
(1) preliminary treatment work: at first, ftp client obtains that the user arranges uploads Thread Count N and wants information and the file transfer form of upload file; Then, according to file size and Thread Count N, original reasonably is divided into to the M piece, guarantees that M is more than or equal to N; Ftp client is set up corresponding provisional configuration file;
(2) ftp client is opened N thread, creates respectively local socket, and application ICP/IP protocol and destination server are set up N control connection;
(3) N of a ftp client thread send respectively USER xxx r n and PASS yyy r the n order user name (xxx) and password (yyy) are sent to ftp server, the login ftp server;
(4), after successfully logging in, the N of a ftp client thread is used respectively the data transmission format that the TYPE command set is unified, for example: when transformat is binary format, the specific instructions that sends to ftp server be TYPE I r n;
(5) ftp client N thread sends respectively PASV r n order, obtains the IP address and the interim open port numbers be connected for setting up data of ftp server from return information, sets up N data for N thread and connects;
(6) ftp client send STOR xxx r the n order, to initiate the file upload procedure to ftp server, xxx is the filename that will create on server;
(7) ftp client distributes the transformation task of a blocks of files for each thread, and N thread set up respectively data with the ftp server end and be connected, and starts uploading data.If a thread has completed the transformation task of allocate file piece, redistribute a new blocks of files to this thread, until all blocks of files have all been uploaded;
(8) ftp client is opened specially a thread and is used for developing and managing the provisional configuration file, the fileinfo needed during the real time record breaking point uploading;
(9), after the All Files piece is all uploaded, the ftp server end is reassembled into the original form according to the order information of each blocks of files by blocks of files;
(10) closeall data connect, the control connection of then closing,
(11) ftp client is deleted the provisional configuration file, and so far a file upload procedure finishes.
Above ftp client file multithreading is uploaded realization flow figure referring to Fig. 2.
If 2 are adopting the present invention to carry out when file is uploaded meeting accident interruption, realize in the following manner the breaking point uploading of file:
(1) preliminary treatment work: ftp client obtains the Thread Count N ' (annotate: the N value that N ' herein can arrange when uploading for the first time is different) of the breaking point uploading that the user arranges, and from read corresponding provisional configuration file at ftp client;
(2) ftp client is opened the individual thread of N ', creates respectively local socket, and application ICP/IP protocol and destination server are set up the individual control connection of N ';
(3) the individual thread of the N ' of ftp client send respectively USER xxx r n and PASS yyy r the n order user name (xxx) and password (yyy) are sent to ftp server, the login ftp server;
(4) after successfully logging in, the individual thread of the N ' of ftp client is used respectively the former transformat that TYPE command set data transmission format is this document, for example: while as former transformat, being binary format, the specific instructions that sends to ftp server be TYPE I r n;
(5) the individual thread of ftp client N ' sends respectively PASV r n order, obtains the IP address and the interim open port numbers be connected for setting up data of ftp server from return information, sets up the individual data of N ' for the individual thread of N ' and connects;
(6) the individual thread of ftp client N ' send respectively APPE xxx r the n order, initiate the file appending upload procedure to ftp server, xxx wants the filename of breaking point uploading file on ftp server;
(7) ftp client, according to the information of obtaining from configuration file, calculates the breakpoint location of each blocks of files, and setting starts to transmit from each breakpoint; Then, for each thread distributes the transformation task of a blocks of files, the individual thread of N ' is set up respectively data with the ftp server end and is connected, and starts uploading data.If a thread has completed the transformation task of allocate file piece, redistribute a new blocks of files to this thread, until all blocks of files have all been uploaded;
(8) ftp client is opened specially a thread and is used for managing the provisional configuration file, the fileinfo needed during the real time record breaking point uploading;
(9) interruption if the process that resumes meets accident again, jump to (1), and order is carried out (1)-(8) again; If again do not interrupt, order is carried out following steps;
(10), after the All Files piece is all uploaded, the ftp server end is reassembled into the original form according to the order information of each blocks of files by blocks of files;
(11) closeall data connect, the control connection of then closing;
(12) ftp client is deleted the provisional configuration file, and so far the document breaking point uploading process finishes.
Above ftp client file multithreading breaking point uploading realization flow figure is referring to Fig. 3.
Above-described embodiment is preferably execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (6)
1. a method that realizes super large file multithreading breaking point uploading based on File Transfer Protocol, is characterized in that, comprises the steps:
S1, in the situation that do not revise original File Transfer Protocol, ftp client is set up multithreading and is connected, and realizes that the multithreading of file is uploaded;
In S2, multithreading upload operation, ftp client is set up a plurality of the connection by multithreading with the ftp server end, connect and comprise that data connect and control connection, size and Thread Count according to upload file, Divide File is become to a plurality of, distribute to different threads and upload, after certain thread has been uploaded a blocks of files, the new blocks of files of reallocating is given this thread, has guaranteed that all threads are all in active state;
In S3, breaking point uploading operation, at first from the provisional configuration file, read breakpoint information, the starting position of each blocks of files while resuming for setting, the method for the S2 that then takes steps, utilize multi-thread concurrent to upload the part that each blocks of files is not yet uploaded;
S4, in the upload operation of step S2 and step S3, ftp client is set up a thread in addition, is specifically designed to real time record provisional configuration fileinfo, guarantees to meet accident while interrupting, starting the breaking point uploading operation can guarantee from correct document location.
2. the method that realizes super large file multithreading breaking point uploading based on File Transfer Protocol according to claim 1, it is characterized in that, in step S2, also be included in client and set up corresponding provisional configuration file, the fileinfo needed while being used for the real time record breaking point uploading; When all pieces of file end of transmission all, after file successfully uploads to ftp server, automatically delete the provisional configuration file of client.
3. the method that realizes super large file multithreading breaking point uploading based on File Transfer Protocol according to claim 1, is characterized in that, in step S2, the classifying rationally method of file is: the size of piecemeal is the integral multiple of the data buffer zone of setting, and minimum is 1 times; The size of piecemeal is not less than the actual Thread Count connected, and each thread can be assigned to the task of uploading.
4. the method that realizes super large file multithreading breaking point uploading based on File Transfer Protocol according to claim 1, is characterized in that, the breaking point uploading process still can be used multithreading, and number of threads different when uploading for the first time can be set.
5. the method that realizes super large file multithreading breaking point uploading based on File Transfer Protocol according to claim 1, it is characterized in that, the information of provisional configuration file including has: whether the side-play amount of the fullpath that file is deposited at the ftp server end, the size of file, the piece number that file is divided into, the size of piece, every BOB(beginning of block) position, the size that every has been uploaded, every have uploaded complete and transformat.
6. the method that realizes super large file multithreading breaking point uploading based on File Transfer Protocol according to claim 1, it is characterized in that, after the upload operation of step S2 and step S3 indication is successfully completed, client must be deleted the provisional configuration file automatically, saves disk space.
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