CN100407642C - Realtime updating method for net page data - Google Patents
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- CN100407642C CN100407642C CN2004100968080A CN200410096808A CN100407642C CN 100407642 C CN100407642 C CN 100407642C CN 2004100968080 A CN2004100968080 A CN 2004100968080A CN 200410096808 A CN200410096808 A CN 200410096808A CN 100407642 C CN100407642 C CN 100407642C
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Abstract
The present invention discloses a method for updating web page data real-timely. The process that the method realizes the real-time update of the web page data comprises: a browser sends out a web page access request to a background server; the background server sends a web page including web page elements querying data update to a client, the web page elements querying data update start working, and query the background server real-timely and get updated data to the client. The method for updating web page data real-timely of the present invention has the advantages of convenient use and high universality, and simultaneously, the method transmits data to the client only when the background data changes, so that much unnecessary web page data transmission is reduced, and the web page data transmission efficiency is improved.
Description
Technical field
The present invention relates to the update method of web data, refer to a kind of real time updating method of web data especially.
Background technology
Along with the develop rapidly of Internet technology, the data message of social life various aspects all depends on the network issue and transmits.The data content of transmission over networks is abundant, have and the closely-related information of popular life, as Internet news, stock index, securities information or weather information etc., the specific information at particular functional area is arranged, data such as the various places reservoir water yield of obtaining as reservoir supervision department, electric weight.The data of transmission over networks offer the user with the form of web data mostly, are the information that continues variation in time for data content itself, and there is the real-time update demand to this web data in user side.
The characteristics that continue to change in time based on data content, and consequent real time data upgrades demand, the real-time update technology of web data progressively grows up.The real-time update technology of web data is a kind of automatically updating data technology, adopt this technology can guarantee data obtain end according to the variation of monitored data automatically more new data obtain the local data of end, thereby guarantee that data obtain end and in the very first time variation of monitored data is made a response.Herein, monitored data refer to owing to continuing to change the data that need real-time update in time.The real-time update technology of web data is widely used in data are had the field of real-time update demand, as network management, portfolio management, hydrology monitoring, and meteorological monitoring etc.
The real-time update technology of web data can be based on two kinds of patterns: client/server (C/S) pattern and browser/server (B/S) pattern.For C/S model, server adopts high performance work station or minicomputer, and user side need be installed special-purpose user side program, and the cost that installation, maintenance and the upgrading etc. of user side program are handled is all very expensive.For the B/S pattern, user side reads the real-time update data of server end based on general browser.At present, general browser has: the Internet Explorer (ProductName) of Microsoft's exploitation, the Netscape Navigator (ProductName) of Netscape's exploitation etc.
Along with the extensive use of B/S pattern, progressively grow up based on the web data real-time update technology of B/S pattern.The system configuration simplified schematic diagram of web data real-time update technology of the prior art as shown in Figure 1, current display web page 103 is by browser 102 and background server 101 contacts, and wherein the contact between browser 102 and the background server 101 meets HTTP(Hypertext Transport Protocol).
At present, the web data real-time update technology based on the B/S pattern comprises following several:
The webpage embedded control technology of the first.This technology is actually the applied in any combination of C/S model and B/S pattern.For the webpage that has control, the real-time update data on the webpage need be similar to the dedicated program of C/S model user side program and resolve, and this dedicated program is called the control program.The control program need be downloaded and install to the user side browser, just can open and read this webpage.
There is following shortcoming in webpage embedded control technology when realizing the real-time update of web data:
(1) because the control program need be passed through a series of processing procedures such as loading, installation and initialization, so it is slower to have the web page browsing speed of embedded control.
(2) on internet security, may carry internet worm with the webpage of embedded control, so in the control installation process, carry virulent control program, may damage user end computer, thereby cause immeasurable disastrous effect if the client has installed.
(3) under the situation that the control program is not installed, browser can't be opened the webpage that has embedded control.Such as: Microsoft's later version of declaration IE6.0 is no longer supported the JAVA technology, user side is when browsing the Applet webpage of realizing with the JAVA mode, must install and resolve the Applet necessary JAVA running environment of webpage (JRE), and need to guarantee that the employed JDK program version JRE program version required with resolving the Applet webpage is consistent.
It two is server push (Server Push) technology.This technology adopts special http response form, send a response data that does not have end mark by server to each visiting browser, between server and browser, keep HTTP to connect forever, no longer include Data Update and send end signal up to server to browser, perhaps user side interrupts connecting, and this HTTP connects just end.In this technology owing to remain connection between server and the browser, server can according to its data more new situation initiatively send more new data to user side.
There is following shortcoming in the server push feed technique when realizing the real-time update of web data:
(1) because server remains with user side and is connected,, server distributes a TCP/IP port so being necessary for each user's connection.Because the TCP/IP port number of server is limited, so this network system can't be supported the access request of a large number of users, and this server and user side remain the resource that the status pole the earth that is connected has been wasted server end.
(2) adopt real-time update that the server push mode the realizes stability requirement height to communication link, so adopt this method to need extra being used to prevent the handling procedure that interrupts, complexity improves.
(3) be not all http response forms of back-level server push technology of all browser, so the scope of application of this method has very big limitation.
(4) existing communication standard code, browser adopts user side to pull (Pull) technology to the server requests webpage.The course of work of this technology is as follows: browser sends request to server; Server is replied the request of browser; After server acknowledge finished, the communication of setting up between browser and the server was connected interruption at once.And in the server push feed technique, system has kept the HTTP between server and the browser to connect.This thought has been run counter to the original intention of design of protocol, so need develop complete corresponding application at each particular problem in actual applications, the development cost costliness.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of real time updating method of web data, automatically realize the real-time update of web data at user side, and guaranteeing the versatility of this method, that is: there is not specific (special) requirements in the web data real-time update of using this method to realize to the user side browser.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of real time updating method of web data, this method may further comprise the steps:
A. user side sends the web page access request to background server;
B. the background server webpage that will comprise the web page element that data query upgrades is sent to user side, the web page element startup work that data query upgrades, in real time inquire the web data that changes, and the web data that changes is sent to user side to background server.
Preferably, the web page element of described data query renewal comprises: timer, and data update module;
Then the web page element startup work that data query upgrades among the step b comprises:
When b1. browser was opened webpage, timer startup work picked up counting;
B2. timer arrives update time, and the trigger data update module is carried out Data Update.
Further, the data updating process of the described data update module of step b2 comprises:
B21. being connected of browser end and background server set up in data update module startup work, and to background server query webpage data situation;
B22. background server judges whether web data changes, if web data changes, and execution in step b23 then, if web data does not change, then data updating process finishes, browser end disconnects with background server and being connected;
B23. the web data after background server will upgrade is delivered to user side, and data update module upgrades the user side data, and data updating process finishes, and browser end disconnects with background server and being connected.
Further, step b21 comprises: data update module sends whether change request of query webpage data to browser; Browser is received this request, sends whether change request of query webpage data to background server.
Further, the described method of judging whether web data changes of step b22 is: background server is that web data is provided with the sign position; By judging whether the sign position changes and then judging whether web data changes, if the sign position changes, judge that then web data changes, if the sign position does not change, judge that then web data does not change.
Preferably, background server is provided with the sign position of the update time of web data as this web data.
Further, the described data update module renewal of step b23 user side data comprise: the web data after data update module relatively upgrades and the data of current display web page; For more new data and the different content of current display web page data, data update module in a covered manner more new data write current display web page.
Further, the described data update module of step b23 upgrades the user side data and comprises: data update module with the mode of whole coverings more new data write current display web page.
Preferably, described web page element is a frame, or web page element is the territory, or web page element is a layer.
Further, described web page element is hiding frame, or described web page element is non-hiding frame.
As seen from the above technical solutions, the real time updating method of this web data of the present invention has increased the web page element that data query upgrades in webpage, the web page element that data query upgrades can be in real time inquired about and obtain more new data to user side to background server.Therefore, for user side, the user is as long as send access request by generic browser and obtain required webpage, and get final product by the webpage that generic browser is read its acquisition, and the real-time update of web data is finished by the web page element of the data query renewal that webpage carries.In this process, it is generic web page or the webpage with real-time update function that the user needn't distinguish the webpage that will visit.For background server, this method only just transfers data to user side when back-end data changes, so reduced many unnecessary web datas transmission, access request that can better the network enabled user.As seen by above-mentioned, the real time updating method of web data all brings great convenience for user side and application developer.
Description of drawings
Fig. 1 realizes the more network architecture schematic diagram of new business of data in real time in the prior art;
Fig. 2 is for realizing the more network architecture schematic diagram of new business of data in real time among the present invention;
Fig. 3 is that trigger data is upgraded flow chart in a preferred embodiment of the present invention;
Fig. 4 finishes the flow chart of Data Update for the data update module of a preferred embodiment of the present invention.
Embodiment
Core concept of the present invention is: user side sends the web page access request to background server; The webpage that background server will comprise the web page element that data query upgrades is sent to user side, and the web page element startup work that data query upgrades is inquired about and obtain more new data to user side to background server in real time.
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
The system configuration simplified schematic diagram of a preferred embodiment of the present invention as shown in Figure 2.As seen from Figure 2, the web page element 204 that data query upgrades is by browser 202 and background server 201 contacts, and wherein the contact between browser 202 and the background server 201 meets http protocol; The web page element 204 that data query upgrades passes to current display page 203 with information, and wherein the data of the web page element 204 of the data of current display page 203 and data query renewal all will be resolved by browser 202.
Web page element 204 and current display page 203 that above-mentioned data query upgrades all are the parts that is downloaded to the webpage of subscriber's local by background server, just the effect difference of the two.Current display page 203 provides to the user and reads, and is the platform that the user obtains information; The web page element 204 that data query upgrades is functional modules of webpage, can regularly upgrade the data of current display page 203.
Among the present invention, the web page element 204 that data query upgrades comprises with lower module: timer 2 05, and data update module 206.This web page element 204 can use but be not limited to use following page unit to realize: frame, territory, or layer.Described frame refers to a kind of web page frame, can be divided into father's frame and sub-frame in the framework again.Described territory is the zone of preserving data on the webpage, such as: the input frame on the webpage, the perhaps choice box on the webpage.Described layer is meant the page unit that adopts the method for layering realization to obtain to webpage.The attribute of above-mentioned frame can be set to hide attribute, that is: the user can't see this frame by browser; Also can be set to non-hiding attribute.
System configuration simplified schematic diagram below in conjunction with Fig. 2 is done detailed description to the real-time update process of web data, and the web page element 204 that data query upgrades in the following process uses hides the frame technique realization.
The real-time update of web data comprises two processes: trigger renewal process and finish data updating process.Wherein, trigger renewal process, be implemented as follows referring to Fig. 3:
Step 301: the user sends the accessed web page request by browser 202 to background server 201.
Step 302: background server 201 sends to subscriber's local with webpage, opens this webpage by browser 202.
Step 303: hide the timer 2 05 startup work in the frame, pick up counting.
The webpage that downloads to subscriber's local from background server comprises current display page 203 and hiding frame, so when browser is opened this webpage, show the user to read current display page on the one hand, triggers the timer 2 05 startup work of hiding in the frame on the other hand.
Step 304: timer 2 05 arrives update time, triggers the data update module of hiding in the frame 206 and carries out the data update functions.
Wherein, the update time of described timer, can be set to equally spaced update time by system's setting, also can be set to unequal interval.Timer arrives just the data update module to be produced once update time at every turn and triggers, and needn't waiting for update time last time and triggering of task is finished and just initiated triggering next time.And background server can be adjusted the update time of timer as required flexibly.
Finish data updating process and finished by the data update module of hiding in the frame 206, concrete steps are referring to Fig. 4:
Step 401: whether data update module 206 sends request to browser, require the query webpage data to change; Browser is received request, then sends the HTTP request to background server, connects with background server, carries out query manipulation.
In the practical application, browser is when receiving the request that data update module 206 sends, and possibility is because other tasks of execution set up with background server to be connected, so browser can utilize the connection of having set up to send the HTTP request to background server.
Step 402: after background server is received request, judge whether web data changes, if data change, then execution in step 403; If data do not change, then this data updating process finishes, and disconnects between browser end and the background server connecting.
In the practical application, under data did not have situation of change, browser may be because other tasks of execution need be used the connection of having set up, and the connection between browser end and the background server at this moment can not disconnect immediately.
Wherein, background server can adopt following method to judge whether web data changes: background server is that web data is provided with the sign position; Then, server judges by judging whether the sign position changes whether web data changes.If the sign position changes, judge that then web data changes; If the sign position does not change, judge that then web data does not change.
The method to set up of above-mentioned Data Identification position is: system with web data in update time of background server the sign as this web data, when whether browser changes in the query webpage data, whether drop on the update time of background server judgment data between browser query time last time and this query time, if then judgment data changes.For example: be respectively 8:05am and 8:20am the update time of two secondary data before and after the background server, query time last time of browser is 8:04am, if this query time of browser is 8:15am, because the data of background server do not change between 8:04am and 8:15am, so the background server judgment data does not change, promptly web data need not to upgrade; If this query time of browser is 8:21am, because the data of background server change when 8:20am, so the background server judgment data changes.
Step 403: the data after background server will upgrade by network are delivered to subscriber's local, finish the Data Update of subscriber's local by data update module, and this data updating process finishes, and disconnect between browser end and the background server connecting.
A kind of implementation method of above-mentioned subscriber's local Data Update is: the more new data that more current display web page data of data update module in the hiding frame and background server send, for the two different data content, data update module in a covered manner will be more new data write current display web page, allow the user read data updated.
The another kind of implementation method of above-mentioned subscriber's local Data Update is: the data update module of hiding in the frame is write current display web page with the more new data that background server sends in the mode of the current display web page of whole coverings, allows the user read data updated.
By the above embodiments as seen, the real time updating method of this web data of the present invention is easy to use, highly versatile.Simultaneously, this method only just transfers data to user side when back-end data changes, so reduced many unnecessary web data transmission, the web data efficiency of transmission is improved.
Claims (10)
1. the real time updating method of a web data is characterized in that, this method may further comprise the steps:
A. user side sends the web page access request to background server;
B. the background server webpage that will comprise the web page element that data query upgrades is sent to user side, the web page element startup work that data query upgrades, in real time inquire the web data that changes, and the web data that changes is sent to user side to background server.
2. web data real time updating method according to claim 1 is characterized in that, the web page element that described data query upgrades comprises: timer, and data update module;
Then the web page element startup work that data query upgrades among the step b comprises:
When b1. browser was opened webpage, timer startup work picked up counting;
B2. timer arrives update time, and the trigger data update module is carried out Data Update.
3. web data real time updating method according to claim 2 is characterized in that, the data updating process of the described data update module of step b2 comprises:
B21. being connected of browser end and background server set up in data update module startup work, and to background server query webpage data situation;
B22. background server judges whether web data changes, if web data changes, and execution in step b23 then, if web data does not change, then data updating process finishes, browser end disconnects with background server and being connected;
B23. the web data after background server will upgrade is delivered to user side, and data update module upgrades the user side data, and data updating process finishes, and browser end disconnects with background server and being connected.
4. web data real time updating method according to claim 3 is characterized in that step b21 comprises: data update module sends whether change request of query webpage data to browser; Browser is received this request, sends whether change request of query webpage data to background server.
5. web data real time updating method according to claim 3 is characterized in that, the described method of judging whether web data changes of step b22 is: background server is that web data is provided with the sign position; By judging whether the sign position changes and then judging whether web data changes, if the sign position changes, judge that then web data changes, if the sign position does not change, judge that then web data does not change.
6. web data real time updating method according to claim 5 is characterized in that, background server is provided with the sign position of the update time of web data as this web data.
7. web data real time updating method according to claim 3 is characterized in that, the described data update module of step b23 upgrades the user side data and comprises: the web data after data update module relatively upgrades and the data of current display web page; For more new data and the different content of current display web page data, data update module in a covered manner more new data write current display web page.
8. web data real time updating method according to claim 3 is characterized in that, the described data update module of step b23 upgrades the user side data and comprises: data update module with the mode of whole coverings more new data write current display web page.
9. according to each described web data real time updating method in the claim 1～8, it is characterized in that described web page element is a frame, or web page element is the territory, or web page element is a layer.
10. web data real time updating method according to claim 9 is characterized in that, described web page element is hiding frame, or described web page element is non-hiding frame.
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