CN107426331A - A kind of file uploading method and device based on JavaScript - Google Patents
A kind of file uploading method and device based on JavaScript Download PDFInfo
- Publication number
- CN107426331A CN107426331A CN201710674572.1A CN201710674572A CN107426331A CN 107426331 A CN107426331 A CN 107426331A CN 201710674572 A CN201710674572 A CN 201710674572A CN 107426331 A CN107426331 A CN 107426331A
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- file
- piecemeal
- javascript
- browser
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Classifications
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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]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/13—File access structures, e.g. distributed indices
- G06F16/137—Hash-based
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/14—Details of searching files based on file metadata
- G06F16/148—File search processing
- G06F16/152—File search processing using file content signatures, e.g. hash values
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Data Mining & Analysis (AREA)
- Databases & Information Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Library & Information Science (AREA)
- Storage Device Security (AREA)
Abstract
The present invention discloses a kind of file uploading method based on JavaScript, comprises the following steps：Selection needs the file uploaded；Piecemeal is carried out to file by JavaScript；Calculate and preserve file fingerprint.Wherein, method of partition can meet to perform many requirements such as speed, information viewpoint, memory consumption, stability, the file of each upload in need, operation program, calculate most suitable piecemeal size automatically, and implement piecemeal；Computational methods are using hash algorithm serial SHA x, compromise between security and stability.The present invention teaches skill art based on the browser second and implemented, it is necessary to which file server and Web page coordinate, when user uses transmitting file on browser, if before file on be transmitted through, without upload again, upload is completed at once, the time of upper transmitting file in browser is saved, saves broadband.
Description
Technical field
The present invention relates to field of computer technology, and in particular to a kind of file uploading method and dress based on JavaScript
Put.
Background technology
Transmitting file is conventional function from browser, mainly there is three kinds of implementations at present：1. based on the upper of Flash
Pass；2. the upload based on browser form；3. the upload based on stream.Above-mentioned three kinds of implementations are all needed in file content whole
Pass to server.It is existing to be based on client file and " second biography " is the mode that uploads a kind of common in Dropbox " ignoring formula "
A kind of optimization method uploaded, its principle are：If file exists on the server, complete text just can not be uploaded again
Part content.
The client-based second, which passes, to be needed to download particular clients, in-convenience in use.Taught skill on file based on browser
Art always needs to upload complete file content, many times has and wastes flow, wastes broadband, when increasing user time wait
Between the shortcomings that.
In view of drawbacks described above, creator of the present invention obtains the present invention finally by prolonged research and practice.
The content of the invention
To solve above-mentioned technological deficiency, the technical solution adopted by the present invention is, there is provided a kind of based on JavaScript's
File uploading method, its step are：
Step S1, selection need the file uploaded；
Step S2, piecemeal is carried out to file by JavaScript；
Step S3, calculate and preserve file fingerprint；
Step S4, fingerprint is sent to server and verified.
Preferably, method of partition is in the step S2：
Wherein,
A represents that the size of transmitting file, unit Gb need to be gone up；
B represents piecemeal size, unit Gb；
C represents piecemeal number, c ＞ 0, and c is integer；
K is additional amount, unit Gb.
Preferably, the step S4 is specially：If the verification passes, step S4-1 is performed, if checking is not by performing
Step S4-2：
Step S4-1 directly replicates from server
Can directly it be replicated from server, the content without the upper transmitting file from browser；
Step S4-2 transmitting files from browser
The content of upper transmitting file from browser.
Preferably, using the hash algorithm of SHA-x series in the step 3.
Preferably, SHA-1 algorithms are used in the step 3.
Preferably, SHA-256 algorithms are used in the step 3.
The present invention also provides a kind of file based on JavaScript and uploads device, and it includes：
Uploading unit：For selecting and upper transmitting file；
Blocking unit：Piecemeal is carried out to the file by JavaScript；
Computing unit：For calculating and preserving file fingerprint；
Authentication unit：For verifying the fingerprint.
Compared with the prior art the beneficial effects of the present invention are：
1, the present invention teaches skill art, it is necessary to which file server and Web page coordinate based on the browser second, and user uses browser
During upper transmitting file, if before file on be transmitted through, without uploading again, upload is completed at once, is saved in browser
The time of transmitting file, save broadband.This method can quickly calculate most suitable piecemeal size, abundant satisfaction execution speed,
Many requirements such as information viewpoint, memory consumption, stability, the file of each upload in need, operation program are automatic to calculate
Go out most suitable piecemeal size, and implement piecemeal.
2, the present invention also supports directly to upload catalogue in browser, if the file of identical content, phase under User Catalog
Same part only needs to take a broadband.
3, the present invention uses newest JavaScript technologies, and the file that high intensity is efficiently calculated in browser refers to
Line, it can accomplish at present or so 100MB/ seconds, such 100MB file can upload to service end, browser clients in 1 second
The network broadband of very little is only needed to be used to send message between end and server.
4, using the hash algorithm of SHA-x series, there is higher security than traditional MD5 algorithms.Collision probability is small,
Different files are effectively avoided identical hash situation occur, being capable of compromise between security and speed both sides standard.
Brief description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in various embodiments of the present invention
The accompanying drawing used is briefly described.
Fig. 1 is the flow chart of the inventive method；
Fig. 2 is the system block diagram of apparatus of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the forgoing and additional technical features and advantages are described in more detail.
Embodiment 1
The present invention provides a kind of file uploading method based on JavaScript, the implementation passed based on the browser second, it is necessary to
File server and Web page coordinate.User is using during transmitting file, file can be pressed fixed size by file server on browser
Piecemeal is carried out, calculates and preserves the file fingerprint of each piecemeal.If before file on be transmitted through, without upload again,
Upload is completed at once, can save the time of transmitting file on browser, saves broadband.
As shown in figure 1, it is a kind of flow chart of JavaScript file uploading file of the present invention, of the invention is specific
Implementation steps are as follows：
Step S1 selections need the file uploaded
User opens in browser uploads the page, and the file for needing to upload is chosen in corresponding document underedge, and clicks on
Pass.
Step S2 carries out piecemeal by JavaScript to file
The file that uploads is needed when choosing, and after clicking on upload, browser page uses
JavaScriptFileReader reads file content according to server identical piecemeal.The core concept of piecemeal is：With
Exemplified by 100Mb sizes, the carry out piecemeal more than 100Mb, otherwise monoblock reading.For the file more than 100Mb, and with 100Mb
Split for unit, guarantee is uploaded with the size no more than 100Mb every time.For example 304Mb file can be divided into
Tetra- pieces of 100Mb, 100Mb, 100Mb, 4Mb is successively read.
In the practical application that file uploads, the size of file block directly affects the speed and efficiency of file upload,
The too small information viewpoint that can influence server storage of file block, file block too conference cause stability degradation, internal memory
Consumption becomes big and even overflowed, and calculated in step S3 file fingerprint time it is elongated, or even trigger browser collapse.It can be seen that
The importance that suitable file block size uploads to file is chosen, creator of the present invention passes through prolonged research and time,
It was found that when piecemeal size and file size have following relation, it can fully meet that performing speed, information viewpoint, internal memory disappears
Many requirements such as consumption, stability：
Wherein,
A represents that the size of transmitting file, unit Gb need to be gone up；
B represents piecemeal size, unit Gb；
C represents piecemeal number, c ＞ 0, and c is integer.
If file is too big, it can be worked to piecemeal and bring great inconvenience, influenceed processor treatment effeciency, be incorporated herein additional
K is measured, unit Gb, user can be set according to being actually needed, to reach more preferable piecemeal effect.
By above-mentioned formula, most suitable piecemeal size can be quickly calculated, without largely being tested, point
Its speed data is not recorded.Above-mentioned formula uses simply, quickly, is written as JavaScript code, so, every time
The file of upload in need, operation program, most suitable piecemeal size is calculated automatically, and implement piecemeal.
Step S3 is calculated and is preserved file fingerprint
Browser and service end identical block algorithm, to each section technique file fingerprint, have been stored afterwards
Come.
When each section technique file fingerprint is corresponded in browser, the JavaScript generations of optimization are write using asm.js
Code, this code execution speed is faster than in general JavaScript, can accomplish 1/3 to 1/2 performance of identical C code,
With the fireballing advantage of execution.
Herein from the good algorithm of security, the hash algorithm of prioritizing selection SHA-x series, collision probability is small, as far as possible
Different files are avoided identical hash situation occur, being capable of compromise between security and speed both sides standard.The choosing of hash algorithm
Final execution efficiency can also be influenceed by selecting, and can be weighed according to the needs of safety and performance and selected, such as：SHA-1 is current still
Comparatively safe and performance acceptable algorithm, SHA-256 securities are also fine, but speed can be slow several times.And MD5 etc
Although algorithm is simple efficiently, have proven to unsafe, it is not recommended that use.
In order to avoid the execution efficiency of JavaScript code influences the performance of the page, the present invention uses optimization
JavaScript code, some optimisation strategies are employed in compiling procedure, to improve treatment effeciency.
Fingerprint is dealt into server and verified by step S4
File fingerprint is dealt into server to be verified, if the verification passes, then documentary evidence has been present, and performs step
S4-1, if checking is not by performing step S4-2.
Step S4-1 directly replicates from server
Can directly it be replicated from server, the content without the upper transmitting file from browser.
Step S4-2 transmitting files from browser
The content of upper transmitting file from browser.
Embodiment 2
Based on same inventive concept, the present invention also provides a kind of file based on JavaScript and uploads device, such as Fig. 2 institutes
Show, it is the system block diagram of apparatus of the present invention.The upload device includes：Uploading unit 1, blocking unit 2, computing unit 3, test
Demonstrate,prove unit 4.
The uploading unit 1 is used for selecting to need the file uploaded.User opens upload interface in a browser, corresponding
File in choose and need the file that uploads, and click on upload.
The blocking unit 2 carries out piecemeal by JavaScript to the file of upload.Use
JavaScriptFileReader piecemeals read file content, and the core concept of piecemeal is：By taking 100Mb sizes as an example, it is more than
100Mb carry out piecemeal, otherwise monoblock reading.
It is of crucial importance to file uploading operation to choose suitable file block size, piecemeal is excessive or too small can all cause
Transfer efficiency reduces, and the blocking unit 2 uses following method of partition：
Wherein,
A represents that the size of transmitting file, unit Gb need to be gone up；
B represents piecemeal size, unit Gb；
C represents piecemeal number, c ＞ 0, and c is integer.
If file is too big, it can be worked to piecemeal and bring great inconvenience, influenceed processor treatment effeciency, be incorporated herein additional
K is measured, unit Gb, user can be set according to being actually needed, to reach more preferable piecemeal effect.
By above-mentioned computational methods, most suitable piecemeal size can be quickly calculated, without largely being surveyed
Examination, records its speed data and is compared successively respectively.The piecemeal size calculated, it can fully meet to perform speed, letter
Cease many requirements such as angle, memory consumption, stability.Above-mentioned formula uses simple, quick, is written as
JavaScript code, so, the file of each upload in need, operation program, most suitable piecemeal size is calculated automatically,
And implement piecemeal.
The computing unit 3 is used for calculating and preserving file fingerprint, and browser and service end use identical block algorithm.
When corresponding to each section technique file fingerprint in a browser, the JavaScript generations of optimization are write using asm.js
Code, this code execution speed is faster than in general JavaScript, can accomplish 1/3 to 1/2 performance of identical C code,
With the fireballing advantage of execution.
It is preferred that from the hash algorithm of SHA-x series, collision probability is small, can effectively avoid different files from occurring identical
Standard of both hash situation, compromise between security and speed.The selection of hash algorithm can also influence final execution efficiency,
It can be weighed according to the needs of safety and performance and selected, such as：SHA-1 is current or comparatively safe and performance acceptable is calculated
Method, Sha-256 securities are also fine, but speed can be slow several times.And although MD5 etc algorithms are simple efficiently, by
It is proved to be unsafe, it is not recommended that use.
In order to avoid the execution efficiency of JavaScript code influences the performance of the page, the computing unit 3 uses optimization
JavaScript code, some optimisation strategies are used in compiling procedure, to improve treatment effeciency.
The authentication unit 4 is used for file fingerprint being sent on server, and is verified.If the verification passes, then
Documentary evidence has been present, and can directly be replicated from server, the content without the upper transmitting file from browser；If checking
Not by the content of upper transmitting file from browser.
Presently preferred embodiments of the present invention is the foregoing is only, is merely illustrative for the purpose of the present invention, and it is non-limiting
's.Those skilled in the art understands, many changes can be carried out to it in the spirit and scope that the claims in the present invention are limited,
Modification, in addition it is equivalent, but fall within protection scope of the present invention.
Claims (7)
1. a kind of file uploading method based on JavaScript, is comprised the following steps that：
Step S1, selection need the file uploaded；
Step S2, piecemeal is carried out to the file by JavaScript；
Step S3, calculate and preserve file fingerprint；
Step S4, the fingerprint is sent to server and verified.
It is 2. as claimed in claim 1, it is characterised in that method of partition is in the step S2：
<mfenced open = "{" close = "">
<mtable>
<mtr>
<mtd>
<mi>b</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mi>a</mi>
<mo>+</mo>
<mn>1</mn>
</mrow>
<mrow>
<mi>c</mi>
<mo>+</mo>
<mn>2</mn>
</mrow>
</mfrac>
<mo>,</mo>
<mo>(</mo>
<mn>0</mn>
<mo><</mo>
<mi>a</mi>
<mo><</mo>
<mn>1</mn>
<mo>)</mo>
</mtd>
</mtr>
<mtr>
<mtd>
<mi>b</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mi>a</mi>
<mo>+</mo>
<mi>k</mi>
<mo>+</mo>
<mn>1</mn>
</mrow>
<mrow>
<mi>c</mi>
<mo>+</mo>
<mn>4</mn>
</mrow>
</mfrac>
<mo>,</mo>
<mo>(</mo>
<mi>a</mi>
<mo>&GreaterEqual;</mo>
<mn>1</mn>
<mo>)</mo>
</mtd>
</mtr>
</mtable>
</mfenced>
Wherein,
A represents that the size of the file, unit Gb need to be uploaded；
B represents piecemeal size, unit Gb；
C represents piecemeal number, c ＞ 0, and c is integer；
K is additional amount, unit Gb.
It is 3. as claimed in claim 2, it is characterised in that the step S4 is specially：If the verification passes, step S4- is performed
1, if checking is not by performing step S4-2：
Step S4-1 directly replicates from server；
Step S4-2 transmitting files from browser.
4. as described in claim any one of 1-3, it is characterised in that calculated in the step 3 using the Hash of SHA-x series
Method.
It is 5. as claimed in claim 4, it is characterised in that SHA-1 algorithms are used in the step 3.
It is 6. as claimed in claim 4, it is characterised in that SHA-256 algorithms are used in the step 3.
7. a kind of file based on JavaScript uploads device, it is characterised in that including：
Uploading unit：For selecting and upper transmitting file；
Blocking unit：Piecemeal is carried out to the file by JavaScript；
Computing unit：For calculating and preserving file fingerprint；
Authentication unit：For verifying the fingerprint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710674572.1A CN107426331A (en) | 2017-08-09 | 2017-08-09 | A kind of file uploading method and device based on JavaScript |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710674572.1A CN107426331A (en) | 2017-08-09 | 2017-08-09 | A kind of file uploading method and device based on JavaScript |
Publications (1)
| Publication Number | Publication Date |
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| CN107426331A true CN107426331A (en) | 2017-12-01 |
Family
ID=60436778
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| CN201710674572.1A Pending CN107426331A (en) | 2017-08-09 | 2017-08-09 | A kind of file uploading method and device based on JavaScript |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108881461A (en) * | 2018-07-02 | 2018-11-23 | 深圳市茁壮网络股份有限公司 | A kind of data transmission method, apparatus and system |
| CN111586094A (en) * | 2020-03-26 | 2020-08-25 | 平安养老保险股份有限公司 | File uploading method and device and computer equipment |
| US11184423B2 (en) | 2018-10-24 | 2021-11-23 | Microsoft Technology Licensing, Llc | Offloading upload processing of a file in a distributed system using a key that includes a hash created using attribute(s) of a requestor and/or the file |
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| CN101699822A (en) * | 2009-08-06 | 2010-04-28 | 腾讯科技（深圳）有限公司 | File uploading method and device, and mass storage system |
| US20140279846A1 (en) * | 2013-03-13 | 2014-09-18 | CoralTree Inc. | System and method for file sharing and updating |
| CN104247376A (en) * | 2013-04-02 | 2014-12-24 | 华为技术有限公司 | File uploading method in cloud storage, client, application server, and cloud storage system |
| CN104639629A (en) * | 2015-01-30 | 2015-05-20 | 英华达（上海）科技有限公司 | File comparing method and system at client and cloud |
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2017
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699822A (en) * | 2009-08-06 | 2010-04-28 | 腾讯科技（深圳）有限公司 | File uploading method and device, and mass storage system |
| US20140279846A1 (en) * | 2013-03-13 | 2014-09-18 | CoralTree Inc. | System and method for file sharing and updating |
| CN104247376A (en) * | 2013-04-02 | 2014-12-24 | 华为技术有限公司 | File uploading method in cloud storage, client, application server, and cloud storage system |
| CN104639629A (en) * | 2015-01-30 | 2015-05-20 | 英华达（上海）科技有限公司 | File comparing method and system at client and cloud |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108881461A (en) * | 2018-07-02 | 2018-11-23 | 深圳市茁壮网络股份有限公司 | A kind of data transmission method, apparatus and system |
| US11184423B2 (en) | 2018-10-24 | 2021-11-23 | Microsoft Technology Licensing, Llc | Offloading upload processing of a file in a distributed system using a key that includes a hash created using attribute(s) of a requestor and/or the file |
| CN111586094A (en) * | 2020-03-26 | 2020-08-25 | 平安养老保险股份有限公司 | File uploading method and device and computer equipment |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171201 |
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| RJ01 | Rejection of invention patent application after publication |