CN104978319A - Method and equipment used for classified transmission of files - Google Patents
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- CN104978319A CN104978319A CN201410132401.2A CN201410132401A CN104978319A CN 104978319 A CN104978319 A CN 104978319A CN 201410132401 A CN201410132401 A CN 201410132401A CN 104978319 A CN104978319 A CN 104978319A
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Abstract
The invention discloses a method and equipment used for the classified transmission of files. The method comprises the following steps: recognizing the data formats of a plurality of files to be transmitted, wherein the data formats are divided into compressed formats and uncompressed formats; and for the files of which the data formats belong to the uncompressed formats, classifying the files according to the data format of each file; for the files which belong to the same category, determining the compression strategy for each file according to the size of each file under the category, compressing each file according to the compression strategy of each file so as to form one or a plurality of packages under the category, determining a data channel corresponding to the category, and transmitting the one or the plurality of packages under the category through the determined data channel. Therefore, the files are subjected to classified compression and transmission, the size of the files can be effectively reduced, and a data flow is reduced so as to improve transmission efficiency.
Description
Technical field
The present invention relates to field of data transmission, particularly, relate to a kind of method and apparatus for document classification transmission.
Background technology
In network application, usually need carry out file download and upload.Along with the development of network, data volume is increased sharply day by day, more and more higher to the requirement of the transfer efficiency of file transfer.
The existing method for file transfer is mostly be transferred to user in the file set of user being asked.Such as, if the file of user's request comprises the file of text formatting and the file of picture format, so, by existing document transmission method, the file of text formatting can be sent to client together with the file of picture format.If the file of picture format is comparatively large, so direct these two kinds of files are sent the bandwidth that may take too much data channel together, this just causes transfer efficiency too low.For mobile client, also can cause the flow that mobile client consumption is too much, thus user needs to pay more expense.In addition, if due to the file of picture format excessive and cause bust this time, user also may cannot obtain the file (relatively little file) of the text formatting that it needs.Thus, the demand of user may all can not be met.In this case, mobile client may need to carry out continually reconnecting and retry, increases load pressure further, consumes more flow.
Summary of the invention
The object of this invention is to provide a kind of method and apparatus for document classification transmission, by classifying to the file of different data format, to realize classified compression and the transmission of file, thus can transfer efficiency be improved, reduce data traffic.
To achieve these goals, the invention provides a kind of method for document classification transmission, the method comprises: the data layout identifying multiple file waiting for transmission, and described data layout is divided into compressed format and unpacked format; The file of described unpacked format is belonged to: according to the data layout of each file, file is classified for its data layout; For the file belonged under same classification, determine the Compression Strategies for each file according to the size of each file under this classification, and according to the Compression Strategies of each file, each file is compressed, to form one or more compressed package under this classification; Determine the data channel corresponding with this classification, and pass through determined data channel transmit this classification under described one or more compressed package.
The present invention also provides a kind of equipment for document classification transmission, and this equipment comprises: for identifying the device of the data layout of multiple file waiting for transmission, described data layout is divided into compressed format and unpacked format; For belonging to the file of described unpacked format for its data layout, the device of file being classified according to the data layout of each file; For for the file belonged under same classification, the Compression Strategies for each file is determined according to the size of each file under this classification, and according to the Compression Strategies of each file, each file is compressed, to form the device of one or more compressed package under this classification; And for determining the data channel corresponding with this classification, and pass through the device that determined data channel transmits the described one or more compressed package under this classification.
In technique scheme, by classifying to the file of unpacked format, sub-categoryly afterwards carrying out compressing file, can ensure that the file in same compressed package has identical data layout thus.In addition, determine corresponding data channel according to file class, can realize the classification transmission of file, the transmission of the file under a kind can not by the impact of the transmission of the file under other classifications.By carrying out classified compression and transmission to file, effectively can reduce file size, thus reduce data traffic, reduce I/O (I/O) load pressure.Further, can also transfer efficiency be improved by said method, under the environment of mobile network, effectively can reduce the number of times with retry that reconnects of mobile terminal, thus meet consumers' demand.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the process flow diagram of the method for document classification transmission according to the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Fig. 1 shows the method for document classification transmission according to the embodiment of the present invention.As shown in Figure 1, the method can comprise: step S101, and identify the data layout of multiple file waiting for transmission, described data layout is divided into compressed format and unpacked format; Belong to the file of described unpacked format for its data layout: step S102, according to the data layout of each file, file is classified; Step S103, for the file belonged under same classification, determine the Compression Strategies for each file according to the size of each file under this classification, and according to the Compression Strategies of each file, each file is compressed, to form one or more compressed package under this classification; Step S104, determines the data channel corresponding with this classification, and pass through determined data channel transmit this classification under described one or more compressed package.
The classification to file can be realized by said method.First, first multiple file waiting for transmission can be divided into two large classes, and one is non-compressed format files, and one is compressed format files.This grade of classification can be referred to as first-level class.After first-level class, for unpacked format file, then secondary classification can be carried out, as described below.
Described unpacked format can comprise following at least one: scale-of-two unpacked format (such as, unpressed picture format, video format etc.), Rich Text Format, Long Binary form.Described Rich Text Format typically refers to the less text formatting of file size, and large text format typically refers to the larger text formatting of file size.Such as, preset size by one and demarcate Rich Text Format and Long Binary form.That is, when the size of text is more than or equal to described default size, the form of text file is Long Binary form; And when the size of text is less than described default size, the form of text file is Rich Text Format.
Suppose that the data layout of file waiting for transmission comprises these three kinds of forms of described scale-of-two unpacked format, described Rich Text Format and Long Binary form.So, after carrying out first-level class, secondary classification can be carried out again for unpacked format file.Such as, the file that its data layout can be belonged to scale-of-two unpacked format is divided into the first kind, and the file that its data layout belongs to Rich Text Format is divided into Equations of The Second Kind, and the file its data layout being belonged to Long Binary form is divided into the 3rd class.
After carrying out secondary classification, for the file belonged under same classification, the Compression Strategies for each file can be determined according to the size of each file under this classification.Such as, the Compression Strategies determining for each file according to the size of each file under every kind can be carried out in the following manner:
1) if the size of file is more than a threshold value, then this file is split into multiple son file, and described multiple son file is compressed respectively, be no more than described threshold value with the size of the son file after making each compression.
Preferably, the maxsize of each son file first can be determined according to compressibility and described threshold value.Then, according to the size of the file that will split and the maxsize of son file, determine to split into how many son files by minimum for file.Such as, file size is 30M, and the maxsize of the son file determined is 10M.So, file declustering should be become 3 son files, such as, file declustering can be become the son file of 3 10M, and file declustering not become the son file of 6 5M.Like this, while ensureing that the size of the son file after meeting each compression is no more than this condition of described threshold value, the number of son file can be reduced as far as possible, thus too much compressed package can be prevented, realize optimum fractionation.
2) if the size of file does not exceed described threshold value, then first the alternative document under this file and this classification is packaged into grouping, and described grouping is compressed, be no more than described threshold value to make the size of the grouping after compression.That is, when the size of file does not exceed described threshold value, choose generic under which file and this file to carry out packing be no more than this principle of described threshold value according to the size of the grouping after compressing to carry out.
Preferably, the maxsize of a grouping can be determined according to compressibility and described threshold value.Afterwards, when packing, how many files can be selected to be packaged into a grouping according to the maxsize of this grouping.Such as, the size of a file is 1M, and the size of another file is 2M, and the size of another file is 7M, and the maxsize of the grouping determined is 10M.So, these three files should be packed together, instead of only two wherein be packed.Like this, while ensureing that the size of the grouping after meeting compression is no more than this condition of described threshold value, the number of grouping can be reduced as far as possible, thus too much compressed package can be prevented, realize optimum packing.
3) if the size of file does not exceed described threshold value, and be not also packaged into grouping by with the alternative document under this classification, then direct this file compressed separately, become an independently compressed package.
In the present invention, described threshold value is that the file size that can carry based on the transmission bandwidth of data channel is determined.In addition, in the present invention, the compression algorithms such as LZ77, LZMA, RLE can be adopted to carry out squeeze operation.But it should be understood that other compression algorithms are also applicable to the present invention.
Thus, just one or more compressed package can be formed under often kind of file class.
The classified compression of the file to unpacked format can be realized by aforesaid operations.Different Compression Strategies is adopted (such as according to the size of file, direct compression, packing compression, compression of unpacking), the optimal compression for each file can be realized, and effectively can reduce data traffic, reduce I/O load pressure, thus improve transfer efficiency.
After completing the classified compression to the file of unpacked format, the data channel corresponding with this classification can be determined according to the classification of file.Such as, for the file of Rich Text Format and Long Binary form, a data channel can be set up.This data channel can adopt Transmission Control Protocol.After classified compression is carried out to the file of Rich Text Format and Long Binary form, transmit the compressed package under these two classifications one by one by this data channel.
And for the file of scale-of-two unpacked format, the data channel that multiple (such as, 2 ~ 5) are concurrent can be set up.Each data channel can adopt the long connection of TCP.After the file of scale-of-two unpacked format is compressed, carry out the compressed package under this classification of parallel transfer by described multiple data channel.Like this, transfer efficiency can be improved.And carrying out file transfer by setting up multiple parallel data channel, client can be made not need to set breakpoint.Client just can be allowed to carry out segmentation by these parallel data channel, breakpoint is downloaded and uploads.
As shown in Figure 1, method provided by the invention can also comprise: the file belonging to described compressed format for its data layout, step S105, determine the data channel corresponding with described compressed format, and pass through the file that determined data channel transmission its data layout described belongs to described compressed format.Wherein, described compressed format can comprise scale-of-two compressed format (such as, picture compression bag, video compress bag etc.).
That is, in the present invention, by carrying out first-level class (that is, file being divided into compressed format files and unpacked format file) to file, can determine which file is compressed.For by compressed file, carry out squeeze operation again with regard to not needing, thus can operation time be saved.
Of the present invention one preferred embodiment in, the method can also comprise: the file belonging to described compressed format for its data layout, passing through before determined data channel transmission its data layout described belongs to the file of described compressed format, the first size determination file according to each file is the need of being split, need by the file split if exist, then corresponding document is split into multiple son file, pass through the file that determined data channel is transmitted described son file and do not needed fractionation afterwards again.
By with under type according to the size determination file of each file the need of being split: if the size of file is more than a threshold value, then determine this file need split.Wherein, the file size that described threshold value can be able to carry based on the transmission bandwidth of data channel is determined.
That is, in this one preferred embodiment, for by the file compressed, though do not need to compress again, judge this file whether excessive and need split.It should be noted that the size of each son file should not exceed described threshold value after needs are become multiple son file by the file declustering split.Preferably, can, according to the size of the file that will split and described threshold value, determine to split into how many son files by minimum for file.Afterwards, file is split according to this minimum number.Like this, while this condition of described threshold value can being no more than in the size ensureing to meet each son file, reducing the number of son file as far as possible, thus too much compressed package can be prevented, realize optimum fractionation.Like this, transmit after large files is splitted into several son file, can transfer efficiency be improved, save flow.
As mentioned above, described compressed format can comprise scale-of-two compressed format.For the file of this scale-of-two compressed format, the data channel that multiple (such as, 2-5) is concurrent can be set up.Each data channel can adopt the long connection of TCP.The compressed package under parallel transfer scale-of-two compressed format files classification is carried out by described multiple data channel.
In the present invention, the multiple data channel for transmitting the file of scale-of-two compressed format can be identical with multiple data channel of the file for transmitting scale-of-two unpacked format.Data channel for transmitting the file of Rich Text Format can be identical with the data channel of the file for transmitting Long Binary form.That is, in the present invention, the file of text formatting is by a data channel transmission, and the file of binary format is by multiple concurrent data channel parallel transfer.
Thus, for the file of text formatting and the file of binary format, transmit by different data channel.Like this, the transmission of the transmission of the file of text formatting and the file of binary format can be made separately to carry out, even if the file transfer of certain form goes wrong, also can not affect the transmission of the file of extended formatting, thus at least make user can receive a part of file.Or suppose that the file of text formatting is less, and the file of binary format is more, by separately transmission, the file of text formatting first can complete transmission, completes transmission after the file of binary format.Like this, user can be made first can to learn the file of text formatting, to meet its portion requirements.And after the file transfer of binary format is complete, user learns the file of binary format again, thus meet whole demands of user.
Under preferable case, when the data channel (that is, corresponding with described Rich Text Format and Long Binary form data channel) of the file for transmitting text formatting is idle, such as, the file of text formatting completes transmission, this data channel can be used for the file transmitting binary format.Like this, can transmit for binary file increases a data channel, thus improve transfer efficiency further.
By carrying out classified compression and transmission to file, the optimal compression of file can be realized, effectively reduce file size, thus reduce data traffic, reduce I/O (I/O) load pressure.Further, can also transfer efficiency be improved by said method, under the environment of mobile network, effectively can reduce the number of times with retry that reconnects of mobile terminal, thus meet consumers' demand.
Of the present invention another preferred embodiment in, no matter be the file belonging to unpacked format for its data layout, or the file of compressed format is belonged to for its data layout, as long as there is file to be split into son file, so, one identifier is set in each son file, to indicate this son file from which file declustering.Like this, by this identifier, user, after receiving these son files, can identify which son file belongs to same file.
The present invention also provides a kind of equipment for document classification transmission.This equipment can comprise: for identifying the device of the data layout of multiple file waiting for transmission, described data layout is divided into compressed format and unpacked format; For belonging to the file of described unpacked format for its data layout, the device of file being classified according to the data layout of each file; For for the file belonged under same classification, the Compression Strategies for each file is determined according to the size of each file under this classification, and according to the Compression Strategies of each file, each file is compressed, to form the device of one or more compressed package under this classification; And for determining the data channel corresponding with this classification, and pass through the device that determined data channel transmits the described one or more compressed package under this classification.
This equipment can also comprise: for belonging to the file of described compressed format for its data layout, determine the data channel corresponding with described compressed format, and pass through the device that determined data channel transmission its data layout described belongs to the file of described compressed format.
This equipment can also comprise: for belonging to the file of described compressed format for its data layout, passing through before determined data channel transmission its data layout described belongs to the file of described compressed format, the first size determination file according to each file is the need of being split, need by the file split if exist, then corresponding document is split into the device of multiple son file; And for belonging to the file of described compressed format for its data layout, determine the data channel corresponding with described compressed format, and pass through device that determined data channel transmission its data layout described belongs to the file of described compressed format and pass through the file that determined data channel transmits described son file and do not need fractionation.
Can to come according to the size determination file of each file the need of being split in the following manner: if the size of file is more than a threshold value, then determine that this file needs to be split; And after needs are become multiple son file by the file declustering split, the size of each son file is no more than described threshold value.
The Compression Strategies determining for each file according to the size of each file under every kind can be carried out in the following manner: if the size of file is more than a threshold value, then this file is split into multiple son file, and described multiple son file is compressed respectively, be no more than described threshold value with the size of the son file after making each compression; If the size of file does not exceed described threshold value, then first the alternative document under this file and this classification is packaged into grouping, and described grouping is compressed, be no more than described threshold value to make the size of the grouping after compression; If the size of file does not exceed described threshold value, and be not also packaged into grouping by with the alternative document under this classification, then direct this file compressed separately.
In the present invention, the file size that described threshold value can be able to carry based on the transmission bandwidth of data channel is determined.
Preferably, each son file has identifier, and this identifier indicates this son file from which file declustering.
Described compressed format can comprise scale-of-two compressed format, and described unpacked format can comprise following at least one: scale-of-two unpacked format, Rich Text Format, Long Binary form.
Preferably, the number of corresponding with described Rich Text Format and described Long Binary form data channel is one; And the number of the data channel corresponding with described scale-of-two unpacked format and described scale-of-two compressed format is multiple.
In sum, in technique scheme, by classifying to the file of unpacked format, sub-categoryly afterwards carrying out compressing file, can ensure that the file in same compressed package has identical data layout thus.In addition, determine corresponding data channel according to file class, can realize the classification transmission of file, the transmission of the file under a kind can not by the impact of the transmission of the file under other classifications.By carrying out classified compression and transmission to file, effectively can reduce file size, thus reduce data traffic, reduce I/O (I/O) load pressure.Further, can also transfer efficiency be improved by said method, under the environment of mobile network, effectively can reduce the number of times with retry that reconnects of mobile terminal, thus meet consumers' demand.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out combination in any between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1., for a method for document classification transmission, it is characterized in that, the method comprises:
Identify the data layout of multiple file waiting for transmission, described data layout is divided into compressed format and unpacked format;
The file of described unpacked format is belonged to for its data layout:
According to the data layout of each file, file is classified;
For the file belonged under same classification, determine the Compression Strategies for each file according to the size of each file under this classification, and according to the Compression Strategies of each file, each file is compressed, to form one or more compressed package under this classification; Determine the data channel corresponding with this classification, and pass through determined data channel transmit this classification under described one or more compressed package.
2. method according to claim 1, is characterized in that, the method also comprises:
The file of described compressed format is belonged to for its data layout, determine the data channel corresponding with described compressed format, and according to the size determination file of each file the need of being split, need by the file split if exist, then corresponding document is split into multiple son file, pass through the file that determined data channel is transmitted described son file and do not needed fractionation afterwards.
3. method according to claim 2, is characterized in that, to come according to the size determination file of each file the need of being split in the following manner: if the size of file is more than a threshold value, then determine that this file needs to be split; And
After needs are become multiple son file by the file declustering split, the size of each son file is no more than described threshold value, and wherein said threshold value is that the file size that can carry based on the transmission bandwidth of data channel is determined.
4. method according to claim 1, is characterized in that, carrys out the Compression Strategies determining for each file according to the size of each file under every kind in the following manner:
If the size of file is more than a threshold value, then this file is split into multiple son file, and described multiple son file is compressed respectively, be no more than described threshold value with the size of the son file after making each compression;
If the size of file does not exceed described threshold value, then first the alternative document under this file and this classification is packaged into grouping, and described grouping is compressed, be no more than described threshold value to make the size of the grouping after compression;
If the size of file does not exceed described threshold value, and be not also packaged into grouping by with the alternative document under this classification, then directly compress separately this file, wherein said threshold value is that the file size that can carry based on the transmission bandwidth of data channel is determined.
5. method according to claim 1, is characterized in that, described compressed format comprises scale-of-two compressed format, and described unpacked format comprise following at least one: scale-of-two unpacked format, Rich Text Format, Long Binary form.
6., for an equipment for document classification transmission, it is characterized in that, this equipment comprises:
For identifying the device of the data layout of multiple file waiting for transmission, described data layout is divided into compressed format and unpacked format;
For belonging to the file of described unpacked format for its data layout, the device of file being classified according to the data layout of each file;
For for the file belonged under same classification, the Compression Strategies for each file is determined according to the size of each file under this classification, and according to the Compression Strategies of each file, each file is compressed, to form the device of one or more compressed package under this classification; And
For determining the data channel corresponding with this classification, and pass through the device that determined data channel transmits the described one or more compressed package under this classification.
7. equipment according to claim 6, is characterized in that, this equipment also comprises:
For belonging to the file of described compressed format for its data layout, determine the data channel corresponding with described compressed format, and according to the size determination file of each file the need of being split, need by the file split if exist, then corresponding document is split into multiple son file, pass through the device that determined data channel is transmitted described son file and do not needed the file split afterwards.
8. equipment according to claim 7, is characterized in that, to come according to the size determination file of each file the need of being split in the following manner: if the size of file is more than a threshold value, then determine that this file needs to be split; And
After needs are become multiple son file by the file declustering split, the size of each son file is no more than described threshold value, and wherein said threshold value is that the file size that can carry based on the transmission bandwidth of data channel is determined.
9. equipment according to claim 6, is characterized in that, carrys out the Compression Strategies determining for each file according to the size of each file under every kind in the following manner:
If the size of file is more than a threshold value, then this file is split into multiple son file, and described multiple son file is compressed respectively, be no more than described threshold value with the size of the son file after making each compression;
If the size of file does not exceed described threshold value, then first the alternative document under this file and this classification is packaged into grouping, and described grouping is compressed, be no more than described threshold value to make the size of the grouping after compression;
If the size of file does not exceed described threshold value, and be not also packaged into grouping by with the alternative document under this classification, then directly compress separately this file, wherein said threshold value is that the file size that can carry based on the transmission bandwidth of data channel is determined.
10. equipment according to claim 6, is characterized in that, described compressed format comprises scale-of-two compressed format, and described unpacked format comprise following at least one: scale-of-two unpacked format, Rich Text Format, Long Binary form.
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