CN108600373A - A kind of Picture Generation Method, server and computer readable storage medium - Google Patents
A kind of Picture Generation Method, server and computer readable storage medium Download PDFInfo
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- CN108600373A CN108600373A CN201810388571.5A CN201810388571A CN108600373A CN 108600373 A CN108600373 A CN 108600373A CN 201810388571 A CN201810388571 A CN 201810388571A CN 108600373 A CN108600373 A CN 108600373A
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- picture
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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
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/54—Interprogram communication
- G06F9/546—Message passing systems or structures, e.g. queues
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
Abstract
The present invention provides a kind of Picture Generation Methods, including：Server carries out initial work；Receive the request of picture card, handles message queue；It draws clamping and receives drawing for order, carry out mapping operation；The picture for drawing card drafting is transmitted to browser by HTTP modes to show.Method through the invention can determine it is that client or server-side draw card according to business scenario, part is calculated and has been transferred to client, both without excessive additional development cost, further reduces the pressure of machine server.
Description
Technical field
It can the present invention relates to a kind of a kind of graphic processing method more particularly to Picture Generation Method, server and computer
Read storage medium.
Background technology
With universal and bandwidth the upgrading of modern the Internet, the content that network generates above is more and more with picture
Mode is propagated, and the scene for being related to freely customizing picture generation content among these is more and more, concurrently generates image content
Quantity is increasing.It is typically all to be generated by Graphics2D that JAVA, which generates picture, is made by oneself based on Target Photo layout calculation
Target content, is then drawn in specified painting canvas by adopted content position step by step, finally the picture number calculated in memory
Picture is generated according to export.Realize picture generate also have it is other can be with based on the modes such as ImageMagick or pure substrate
It uses, principle is realized in background by the way that target content is rendered by specified calculating logic.
In the prior art, generating picture based on server-sides such as JAVA or ImageMagick needs server to possess by force
Big calculated performance, because being calculated to a large amount of involved in the generating process of picture, when business scenario needs concurrently a large amount of generate
When picture, several servers cannot also efficiently produce self-defined picture；In addition, based on services such as JAVA or ImageMagick
The mode that end generates picture needs constantly to write the customized logic for calculating layout according to custom content, and consumption is big among these
The debug time of amount, and picture rendering effect is generally bad.
Invention content
In view of this, present invention contemplates that providing a kind of express servers and HTML5 canvas based on nodeJS
Picture Generation Method.Server can be significantly improved by using the event-based model based on the non-obstructive type lightweights of nodeJS
I/O throughput.The picture component of HTML5 canvas draws card compared to traditional Java can promote rendering efficiency.Using HTML5
The picture component of canvas can be multiplexed in client and server-side, be that client or server-side are drawn according to business scenario decision
Card calculates part and has been transferred to client, both without excessive additional development cost, further reduces machine server
Pressure.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
In a first aspect, the present invention provides a kind of Picture Generation Method, the method includes：
Server carries out initial work；
Receive the request of picture card, handles message queue；
It draws clamping and receives drawing for order, carry out mapping operation；
The picture for drawing card drafting is transmitted to browser by HTTP modes to show.
Particularly, wherein server progress initial work is specially：
The startup of reading service device configures；Establish route mapping relationship；Message queue is created, picture card message queue is initialized；Just
Beginningization preloads page data without interface browser；Initialize node event sniffers.
Particularly, the receiving request, processing message queue are specially：
The request of picture card is received every time, and a record is just being added in message queue；
Draw card server consumer record from message queue；
According to the type of message drawn in card request, it is loaded into one or more draw in card module.
Particularly, drawing for order is received in the picture clamping, is carried out mapping operation and is specially：
The picture strap form creates Drawing Object；The drawing image in Drawing Object；Drawing board is saved as into picture.
Optionally, the Drawing Object is canvas Drawing Objects.
Optionally, described drawing board is saved as into picture to be specially：Call canvas.toDataURL that drawing board is saved as figure
Piece.
Optionally, the message queue is redis message queues.
Optionally, the server is nodeJS servers.
In addition, to achieve the above object, the present invention also provides a kind of server, the server includes：Memory, processing
The picture that device and being stored in can be run on the memory and on the processor generates program, and the picture generates program quilt
The step of processor realizes Picture Generation Method as described in any one of the above embodiments when executing.
In addition, to achieve the above object, it is described computer-readable the present invention also provides a kind of computer readable storage medium
It is stored with picture on storage medium and generates program, the picture is generated when program is executed by processor and realized such as any of the above-described institute
The step of Picture Generation Method stated.
The picture life of the object of the present invention is to provide a kind of express servers and HTML5 canvas based on nodeJ
At method.Wherein server-side draws the single picture of card business and generates service logic and uncomplicated, but has many identical tasks
It concurrently carries out, has the characteristics that I/O intensive type.It can be bright using the event-based model based on the non-obstructive type lightweights of nodeJS
The aobvious I/O throughput for improving server.The picture component of HTML5 canvas draws card compared to traditional Java can promote rendering effect
Rate.It can be multiplexed in client and server-side using the picture component of HTML5 canvas, be client according to business scenario decision
End or server-side draw card, and part is calculated and has been transferred to client, both without excessive additional development cost, further drop
The low pressure of machine server.
Description of the drawings
Fig. 1 shows a kind of flow chart of Picture Generation Method of the present invention；
Fig. 2 shows the message processing flow-charts of one embodiment of the invention；
Fig. 3 shows that one embodiment of the invention draws card service flow diagram.
Specific implementation mode
In order to more fully hereinafter understand the features of the present invention and technology contents, below in conjunction with the accompanying drawings to the reality of the present invention
It is now described in detail, appended attached drawing purposes of discussion only for reference, is not used for limiting the present invention.
As described in Figure 1, Fig. 1 shows a kind of flow chart of Picture Generation Method of the present invention.
As shown in Figure 1, the present invention provides a kind of Picture Generation Method, the method includes：
Server carries out initial work；
Receive the request of picture card, handles message queue；
It draws clamping and receives drawing for order, carry out mapping operation；
The picture for drawing card drafting is transmitted to browser by HTTP modes to show.
For example, when user browses in a browser, there are many pictures for browsing pages, then browser meeting at this time
It sends in request message to server.Or it is sent in picture card HTTP request to node service layers by Java application service layers.
Wherein, hypertext transfer protocol（HTTP, HyperText Transfer Protocol) it is to interconnect web-based applications most
For a kind of extensive procotol.HTTP is the standard of client and server end a request and response（TCP）.Client is
Terminal user, server end are websites.One is initiated by using Web browser, web crawlers or other tools, client
It is a to designated port on server（Default port is 80）HTTP request.
According to embodiments of the present invention, wherein server progress initial work is specially：
The startup of reading service device configures；Establish route mapping relationship；Message queue is created, picture card message queue is initialized；Just
Beginningization preloads page data without interface browser；Initialize node event sniffers.
It should be noted that startup configuration can be administrator or the pre-set configuration mode of user, including but not
It is limited to the program of server operation, draws the driving initialization program etc. of card.
The routing relation of foundation can be the link maps relationship established between server and client, can also be service
Link maps relationship is established between device and other processing servers, by the mapping relations of routing, the data that can be oriented are logical
Letter.
Initialization preloads page data without interface browser.It is the browser for first loading not interface, that is to say, that
Any interface data is not shown in browser at this moment, then the page data of pre-loaded setting.
Initialize node event sniffers.It should be understood by those skilled in the art that most module in Node.js, all
It is inherited from Event modules.Event modules（events.EventEmitter）It is the reality of a simple event sniffer pattern
Existing class.Its object has addListener, on, once, removeListener, removeAllListeners, emit etc.
The method of basic action listener pattern is realized.Certainly, initialization node event sniffers of the invention are not limited thereto, and are appointed
What achievable node action listener is both fallen in the scope of the invention.
According to embodiments of the present invention, the receiving request, processing message queue are specially：
The request of picture card is received every time, and a record is just being added in message queue；
Draw card server consumer record from message queue；
According to the type of message drawn in card request, it is loaded into one or more draw in card module.
The request message stored in message queue can be arranged according to the time sequencing of reception, can also be according to preset
Priority is arranged.The message queue being arranged in front then can preferentially be sent to node service layers and carry out canvas picture card processing.
For example, sequentially carrying out arrangement between when employed to be being then to use first in, first out（FIFO, First Input First
Output）Mode, i.e., the request of advanced enqueue first handled；Then it is according to finger when using when being ranked sequentially of priority
Surely the priority orders asked are handled, for example, request 1 priority be 5, ask 2 priority be 3, ask 3 it is preferential
Grade is 1, and it is high priority that priority, which is 5, then after priority arrangement, the request 1 that first processing priority is 5, so ask
Asking 1 can be handled earlier than priority 2 and 3, that is, is carried out subsequent canvas and drawn card processing.
Wherein, it is either one or more to draw card module, it, can be with parallel processing figure number in the case of multiple
According to increasing the speed of processing.According to request type, different picture strap forms is loaded, can be set in pre-set server
Each solicited message type drawn card and executed is set, then carries out the place of picture card according to the rule pre-set when processing
Reason；Certainly, it will be appreciated by those skilled in the art that the present invention can also be after server receives different requests, according to request
The complexity and complexity of processing, the selective different picture card that is assigned to are handled.It draws strap form and creates canvas objects；
The drawing image in canvas objects；Call canvas.toDataURL that drawing board is saved as picture.Callback method is executed, is passed back
Pictorial information carries out the display of browser.
According to embodiments of the present invention, drawing for order is received in the picture clamping, is carried out mapping operation and is specially：
The picture strap form creates Drawing Object；The drawing image in Drawing Object；Drawing board is saved as into picture.
It should be noted that the Drawing Object is canvas Drawing Objects.Canvas is painted by JavaScript
2D figures processed.Canvas is rendered pixel-by-pixel.Developer can realize arbitrary drawing by javascript scripts.
Canvas elements are used for the graphing on webpage.The canvas elements of HTML5 are using JavaScript on webpage
Draw 2D images.
Drawing board is saved as into picture it is specially it should be noted that described：Canvas.toDataURL is called to protect drawing board
Save as picture.Those skilled in the art are it will be clear that canvas.toDataURL is treatment technology commonly used in the prior art.
It should be noted that the message queue is redis message queues.Redis is a use ANSI C to increase income
Language writes, support network, can based on memory also can persistence log type, Key-Value databases, and provide multilingual
API.Redis is a key-value storage system.Similar with Memcached, it supports the value types of storage opposite
More, including string (character string), list (chained list), set (set), zset (sorted set -- ordered set) and
hash（Hash type）.
It should be noted that the server is nodeJS servers.Node.js is a Javascript running environment
(runtime), it is published in May, 2009, is developed by Ryan Dahl, is encapsulated to Chrome V8 engines.
Node.js optimizes some special cases, provides the API of replacement so that V8 runs more preferably under non-browser environment.
By the way of Node supports event loop using a series of " non-obstruction " libraries.Substantially it is exactly for file system, database etc
Resource provide interface.When sending a request to file system, without waiting for hard disk（Address simultaneously retrieval file）, hard disk preparation
Non-blocking interface is notified that Node when good.
Fig. 2 shows the message processing flow-charts of one embodiment of the invention.
Under Picture Generation Method based on nodeJS servers and HTML5 canvas proposed by the invention includes mainly
Row step：
（1）Express task server initiations.
Reading service device starts configuration；Establish route mapping relationship；Redis examples are created, picture card message queue is initialized；
Initialization preloads page data without interface browser；Initialize node event sniffers.
（2）Receive request, handles message queue.
Each interface is asked to picture card, and a record is added in redis message queues；Card server is drawn from message
Consumer record in queue；It draws card server and executes specific picture card flow, triggering readjustment after completing, and trial is from message queue
Consume new record.
The request message stored in message queue can be arranged according to the time sequencing of reception, can also be according to preset
Priority is arranged.The message queue being arranged in front then can preferentially be sent to node service layers and carry out canvas picture card processing.
For example, sequentially carrying out arrangement between when employed to be being then to use first in, first out（FIFO, First Input First
Output）Mode, i.e., the request of advanced enqueue first handled；Then it is according to finger when using when being ranked sequentially of priority
Surely the priority orders asked are handled, for example, request 1 priority be 5, ask 2 priority be 3, ask 3 it is preferential
Grade is 1, and it is high priority that priority, which is 5, then after priority arrangement, the request 1 that first processing priority is 5, so ask
Asking 1 can be handled earlier than priority 2 and 3, that is, is carried out subsequent canvas and drawn card processing.
（3）It is specific to draw card implementation procedure.
According to request type, different picture strap forms is loaded；It draws strap form and creates canvas objects；In canvas objects
Drawing image；Call canvas.toDataURL that drawing board is saved as picture.Callback method is executed, it is clear to pass pictorial information progress back
Look at the display of device.According to request type, different picture strap forms is loaded, can be set in pre-set server each
The solicited message type that card executes is drawn, then carries out the processing of picture card according to the rule pre-set when processing；Certainly,
It will be appreciated by those skilled in the art that the present invention can also be after server receives different requests, according to answering for request processing
Miscellaneous and complexity, the selective different picture card that is assigned to are handled.
In embodiments of the present invention, the business characteristic of card functional requirement is drawn：At peak period, can concentrate in a short time big
The concurrently picture card of amount is asked while being reached.
Event-based model based on the non-obstructive type lightweights of nodeJS has good performance in this scene.
Message queue realizes that key assignments of the redis mono- based on memory stores database, keeps the original of data using redis
Sub- property has very high efficiency again.
The program is with good expansibility, when drawing the accumulation of card message queue, it is only necessary to directly increase deployment
The machines of same services.
The picture component of HTML5 canvas draws not only to have compared to Java draws efficiency faster, and develops more
Simplicity has higher development efficiency.
It can be multiplexed in client and server-side using the drawing template component of HTML5 canvas, determined according to business scenario
Surely it is that client or server-side draw card, part is calculated and has been transferred to client, development cost is both reduced, further drops
The low pressure of machine server.
Java before draws card server, a card of effect same, the machine of 4 core 8G configurations, processing picture card industry per second
Business number 12；Using the picture card server of this method, in comparable configuration, processing picture card business number 25 per second compares Java
It draws card and promotes 108%；In the case that drawing template component is reusable, about 80% picture card business can hand over to client progress.
In conclusion it is based on this picture chucking method, server process improved efficiency 108%.
Fig. 3 shows that one embodiment of the invention draws card service flow diagram.
By Fig. 3 as it can be seen that the present invention can be divided into three parts, Java application service layers, node service layers, data Layer.Wherein,
Processing is made requests in node service layers and canvas draws card service function；Redis message queues are provided in data Layer, it can be into
Row addition and consumption processing, consumption processing are then that request to the canvas picture card services in assignment messages queue are handled.
Picture card HTTP request is sent in Java application service layers to node service layers, and institute is had received in node service layers
It is then added in redis message queues after stating request, i.e., each interface to picture card is asked, and is added in redis message queues
Add a record.The request message stored in message queue can be arranged according to the time sequencing of reception, can also be according to pre-
If priority arranged.The message queue being arranged in front then can preferentially be sent to node service layers and carry out canvas pictures Ka Chu
Reason.The graph data handled well is subjected to picture resource readjustment HTTP request hair after it have passed through canvas and draw card service processing
It send to Java application service layers.Subsequently, then the graph data of processing is shown in a browser.
It can be multiplexed in client and server-side using the drawing template component of HTML5 canvas, determined according to business scenario
Surely it is that client or server-side draw card, part is calculated and has been transferred to client, development cost is both reduced, further drops
The low pressure of machine server.
Java before draws card server, a card of effect same, the machine of 4 core 8G configurations, processing picture card industry per second
Business number 12；Using the picture card server of this method, in comparable configuration, processing picture card business number 25 per second compares Java
It draws card and promotes 108%；In the case that drawing template component is reusable, about 80% picture card business can hand over to client progress.
The present invention also provides a kind of server, the server includes：Memory, processor and it is stored in the memory
Picture that is upper and can running on the processor generates program, and the picture is generated when program is executed by the processor and realized
The step of Picture Generation Method as described in any one of the above embodiments.
Wherein, the picture generation program run on the processor is performed realized method and can refer to the present invention
The each embodiment of Picture Generation Method, details are not described herein.
The present invention also provides a kind of computer readable storage medium, picture is stored on the computer readable storage medium
Program is generated, the picture generates the step that Picture Generation Method as described in any one of the above embodiments is realized when program is executed by processor
Suddenly.
Wherein, the picture generation program run on the processor is performed realized method and can refer to the present invention
The each embodiment of Picture Generation Method, details are not described herein.
The present invention provides a kind of Picture Generation Method of express servers and HTML5 canvas based on nodeJ.
Wherein server-side draws the single picture of card business and generates service logic and uncomplicated, but have many identical tasks concurrently into
Row, has the characteristics that I/O intensive type.It can be significantly improved using the event-based model based on the non-obstructive type lightweights of nodeJS
The I/O throughput of server.The picture component of HTML5 canvas draws card compared to traditional Java can promote rendering efficiency.It adopts
Can be multiplexed in client and server-side with the picture component of HTML5 canvas, according to business scenario decision be client or
Server-side draws card, and part is calculated and has been transferred to client, both without excessive additional development cost, further reduces machine
The pressure of device server.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.Apparatus embodiments described above are merely indicative, for example, the division of the unit, only
A kind of division of logic function, formula that in actual implementation, there may be another division manner, such as：Multiple units or component can combine, or
It is desirably integrated into another system, or some features can be ignored or not executed.In addition, shown or discussed each composition portion
It can be the INDIRECT COUPLING by some interfaces, equipment or unit to divide mutual coupling or direct-coupling or communication connection
Or communication connection, can be electrical, mechanical or other forms.
The above-mentioned unit illustrated as separating component can be or may not be and be physically separated, aobvious as unit
The component shown can be or may not be physical unit；Both it can be located at a place, may be distributed over multiple network lists
In member；Some or all of wherein unit can be selected according to the actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in various embodiments of the present invention can be fully integrated into a processing unit, also may be used
It, can also be during two or more units be integrated in one unit to be each unit individually as a unit；It is above-mentioned
The form that hardware had both may be used in integrated unit is realized, can also be realized in the form of hardware adds SFU software functional unit.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in computer read/write memory medium, which exists
When execution, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes：Movable storage device read-only is deposited
Reservoir（ROM, Read-Only Memory）, random access memory（RAM, Random Access Memory）, magnetic disc or
The various media that can store program code such as CD.
If alternatively, the above-mentioned integrated unit of the present invention is realized in the form of software function module and as independent product
Sale in use, can also be stored in a computer read/write memory medium.Based on this understanding, the present invention is implemented
Substantially the part that contributes to existing technology can be expressed in the form of software products the technical solution of example in other words,
The computer software product is stored in a storage medium, including some instructions are used so that a computer equipment（It can be with
It is personal computer, server or network equipment etc.）Execute all or part of each embodiment the method for the present invention.
And storage medium above-mentioned includes：Movable storage device, ROM, RAM, magnetic disc or CD etc. are various can to store program code
Medium.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of Picture Generation Method, which is characterized in that the method includes：
Server carries out initial work；
Receive the request of picture card, handles message queue；
It draws clamping and receives drawing for order, carry out mapping operation；
The picture for drawing card drafting is transmitted to browser by HTTP modes to show.
2. according to the method described in claim 1, it is characterized in that, the wherein described server progress initial work is specially：
The startup of reading service device configures；Establish route mapping relationship；Message queue is created, picture card message queue is initialized；Just
Beginningization preloads page data without interface browser；Initialize node event sniffers.
3. according to the method described in claim 1, it is characterized in that, the receiving request, processing message queue are specially：
The request of picture card is received every time, and a record is just being added in message queue；
Draw card server consumer record from message queue；
According to the type of message drawn in card request, it is loaded into one or more draw in card module.
4. according to the method described in claim 1, it is characterized in that, drawing for order, progress mapping operation tool are received in picture clamping
Body is：
The picture strap form creates Drawing Object；The drawing image in Drawing Object；Drawing board is saved as into picture.
5. according to the method described in claim 4, it is characterized in that, the Drawing Object is canvas Drawing Objects.
6. according to the method described in claim 4, it is characterized in that, described save as picture by drawing board and be specially：It calls
Drawing board is saved as picture by canvas.toDataURL.
7. according to the method described in claim 1, it is characterized in that, the message queue is redis message queues.
8. according to the method described in claim 1, it is characterized in that, the server is nodeJS servers.
9. a kind of server, which is characterized in that the server includes：It memory, processor and is stored on the memory
And the picture that can be run on the processor generates program, the picture is generated when program is executed by the processor and is realized such as
The step of Picture Generation Method described in any item of the claim 1 to 8.
10. a kind of computer readable storage medium, which is characterized in that be stored with picture life on the computer readable storage medium
At program, the picture generates and realizes that picture described in any item of the claim 1 to 8 such as generates when program is executed by processor
The step of method.
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