CN110659431B - Disk cache optimization method for Android television browser - Google Patents
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- CN110659431B CN110659431B CN201910897112.4A CN201910897112A CN110659431B CN 110659431 B CN110659431 B CN 110659431B CN 201910897112 A CN201910897112 A CN 201910897112A CN 110659431 B CN110659431 B CN 110659431B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/955—Retrieval from the web using information identifiers, e.g. uniform resource locators [URL]
- G06F16/9566—URL specific, e.g. using aliases, detecting broken or misspelled links
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/957—Browsing optimisation, e.g. caching or content distillation
- G06F16/9574—Browsing optimisation, e.g. caching or content distillation of access to content, e.g. by caching
Abstract
The invention discloses a disk cache optimization method for an Android television browser, which can effectively accelerate the access speed of the browser to webpage resources, particularly on a television platform, can effectively avoid the situation that the webpage cannot be loaded due to network problems of the browser and the like, can also effectively update cache resources, and can prevent a user from loading an old webpage.
Description
Technical Field
The invention relates to the technical field of browsers, in particular to a disk cache optimization method for an Android television browser.
Background
With the rapid development of internet technology, especially the continuous improvement and perfection of mobile internet technology and television functions, the hardware performance level is promoted year by year, internet surfing and video playing through a television platform become more and more popular, generally, webpage resources required to be loaded by a browser are various and include resources such as pictures, media, webpage codes and the like, and an important premise that the browser can normally browse webpages is that the network must be connected, otherwise, only local webpages can be loaded. The existing form of the browser on the current television platform is no longer a simple browser which is only used for accessing a webpage in the traditional sense, but rather exists as a technology and a platform mode, for example, based on the H5 application operated by the browser, if the H5 application needs to access network resources, the application is used under the condition of no network or poor network state, caching becomes impotent, the browser can preferentially use the network resources when the network is connected, the network loading can be automatically switched to the caching loading of a local disk medium when the network is not smooth or the network is unavailable, and meanwhile, the timely updating of the caching resources on the disk medium can be guaranteed.
In the existing Cobalt browser kernel technology, the inventor finds that: the browser does not have a cache function, and in a no-network state, the browser can only load a local page and cannot load a network page or network resources, so that many functions based on network operation are limited based on the H5 application operated by the browser kernel platform, for example, a waterfall flow page for providing a movie and television list, a page for providing movie and television information introduction, and the like cannot be loaded, and the user experience is greatly examined. And other kernel browsers, the caching technology provided by which is based on http protocol and the like, have complex function realization and are not suitable for television platforms.
Disclosure of Invention
Data resources with different formats, contents and information content exist on a webpage accessed by a browser, an effective method is used for storing the webpage resources, a set of matching method is established, so that the browser can accurately identify and retrieve the stored network resources, cache intervention is performed when the browser requests the data resources from a network by means of multi-dimension judgment, the browser is guaranteed to preferentially load the network resources, the cache resources are continuously read and processed after a problem occurs in the loading process, the webpage can be normally displayed no matter what network environment the browser is in, and local disk cache resources are updated and maintained.
The invention aims to solve the problems, and provides an Android television browser disk cache optimization method, which can effectively accelerate the loading of a webpage by a browser, improve the display speed of the webpage of the browser, enable the browser to preferentially access network resources and then local disk cache resources, and simultaneously achieve the synchronous updating of the local disk cache resources under the condition that the webpage is updated.
The invention realizes the purpose through the following technical scheme:
a disk cache optimization method for an Android television browser comprises the following steps:
1 creates a global data structure for storing each of the Url information processed by the browser.
2, creating a global data structure for recording the cache information of the network resource in the local disk, wherein the data structure mainly comprises information of the absolute Url of the resource, the local storage path of the resource, the check value of the resource md5, the size of the resource data, the type of the resource data, the frequency of the resource being accessed, the time of the resource being accessed, and the like.
3 when creating a new Url link request, the browser firstly inquires the network connection state of the current device, creates a record information for recording the current network connection state for the connection object, and sets and starts a timer for judging whether the Url request object generates a resource request overtime, and the timer triggers a function to judge after the timer reaches the time.
4 if the network connection is abnormal, entering a disk cache module to inquire whether the resource corresponding to the Url has web cache data stored on a disk medium, if the cache resource exists, entering a browser layout manager, changing the Url information of the resource on the web node into the local path information of the disk cache resource, changing the reading of the network Url resource by the browser into the reading of the local cache resource, and simultaneously recording the processing of the Url to the data structure created in the step 2.
And 5 if the network connection is normal, creating a space in the memory at the downloading stage of the webpage resources, and backing up a data segment every time a segment of data is received because the downloading transmission of the webpage resources can be performed in a segmented manner, and transferring the data segment into the space created in the memory.
6 when the Url connection is closed, calculating whether the total length of the data resource that the Url should need to receive is consistent with the length of the data backed up in the memory, if not, abandoning the data in the memory and not processing the data, if the data are consistent, entering md5 check value calculation, searching whether the cache data of the Url resource exists in the local disk cache or not, if yes, reading the md5 check value of the Url resource in the data structure of the cache information stored in the step 2, further judging whether the received md5 check value of the webpage resource is consistent with the md5 check value of the local data resource with the Url cache, if the data are consistent, the new data and the old data are the same, the newly received network resource is not processed, the memory resource is directly released, if not, the webpage resource is updated, the newly received network data resource in the memory is stored in the local disk medium, and the data structure of the cache information stored in the step 2 is updated.
7 if the network connection is abnormal, such as the network is unstable, or the network speed is slow. The overtime timer set in step 3 will play a detection role, if the network state is good, the web page resource can receive the data before the timer finishes timing, then the overtime judgment will be cancelled, if the network state is not good, the web page resource can not receive the data before the timer finishes timing, at this time, the timer triggers the overtime judgment function, the browser will judge that the current network module receives the data header information of the Url and the requested partial data information, and simultaneously enter the disk cache module to inquire whether the resources corresponding to the Url have web page cache data stored on the disk medium, if the cache resources exist, the received network data will be cleared, simultaneously the server return code in the Url header data information is modified, then the cache data on the disk medium and the data format and other information are read, the read cache data will be directly pushed into the data decoder related to the Url resource for decoding operation, continuously updating the data structure of the cache information stored in the step 2; if the cache of the Url is not inquired in the cache module, the request flow is not modified, and the processing flow of the browser is kept.
In the step 1, the created data structure is mainly used to record state information generated in the process of requesting resources by each network Url processed by the browser kernel, and provide an information basis for subsequent intervention operations of cache.
In the step 2, the created data structure is mainly used for recording index information of the browser kernel cache, the data structure mainly includes information of the absolute Url of the resource, a local resource storage path, a resource md5 check value, a resource data size, a resource data type, a resource access frequency, a resource access time and the like, when the browser is started, the local record information is read and filled into the data structure, and the data structure is synchronously updated by the following newly added cache, cache update and cache removal, so that the index data structure is ensured to be unique and effective in the current browser and to be updated in real time.
In the step 3, each network Url is an independent network request object, and the judgment of the network connection state is helpful for providing the judgment result of the network state when the judgment is provided according to the Url connection request to the browser loading cache in the first time, and the judgment result is synchronously recorded in the data structure in the step 1. If the network connection is not normal, the browser directly enters step 4, whether the current browser has the cache of the Url is inquired from the data structure in step 2, if the current browser has the cache, the browser directly enters a browser layout manager, the network Url information of the resource on the webpage node is changed into the local path information of the disk cache resource, the browser is changed from reading the network Url resource to reading the local cache resource, and meanwhile, the operation is recorded to the data structure in step 2. If the network connection is normal, the browser creates a timer when initiating a network Url resource request, and the timer is used for judging whether the network data acceptance is overtime.
The step 5 is the case where the network connection is normal. When receiving network data, a space needs to be opened up in the memory, and when receiving network Url resources, the browser can backup a copy of data and store the data in the newly opened memory space. Under the condition that the network state is relatively good, the data can be successfully downloaded within the timeout time set in the step 3, the step 6 is entered, when the data reception is completed, the network connection is to be closed, the total length of the data resource which should be received by the network Url is calculated, whether the total length is consistent with the length of the data backed up in the memory or not is calculated, if the total length is not consistent with the length of the data backed up in the memory, the data in the memory is abandoned for non-processing, if the total length is consistent with the length of the data, the md5 check value calculation is entered, meanwhile, whether the cache data of the Url resource exists in the local disk cache in the data structure of the step 2 or not is searched, if the cache data exists, the md5 check value of the Url resource is read from the data structure, whether the md5 check value and the data format of the new and old cache data are consistent or not is judged, if the new and old cache data are consistent, the new and old data are not processed, the newly received network resource is directly released, if the new and the web resource is not consistent, the web resource is updated, and (3) storing the newly received network data resources in the memory into the local disk medium, and synchronously updating the data structure information in the step (2).
In the step 7, if there is network connection but the network is unstable, a resource request of the network Url is opened, and a problem may occur in the request process, if the network Url resource cannot be downloaded within the timeout period set in the step 3, or an error code exists in the data header returned by the network request, the network request is synchronously updated to the data structure in the step 1, and meanwhile, the data structure in the step 2 is queried whether the Url has cache data locally; if the cache data exists, emptying the received network data, simultaneously modifying an error code in a data header returned by the network request, reading the cache data on the disk medium at the time, information such as the format of the data and the like, directly pushing the read cache data into a data decoder related to the Url resource for decoding operation, and synchronously updating the operation to the data structure in the step 2; if the cache data does not exist, the request flow is not modified, and the processing flow of the browser is kept.
The invention has the beneficial effects that:
according to the disk cache optimization method for the Android television browser, disclosed by the invention, when a user browses a webpage by using the browser, the user does not need to worry about the current network environment of the browser, particularly the network condition when using a web app, the disk cache optimization measure can ensure the normal and rapid loading of the web app application to the webpage, particularly the problem that data cannot be refreshed due to poor network conditions of a television launcher application interface realized in a web app manner can be solved, meanwhile, the local cache resources can be effectively updated, the page loading speed is increased, and the user experience is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the embodiments or the drawings needed to be practical in the prior art description, and obviously, the drawings in the following description are only some embodiments of the embodiments, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a cache optimization module for a disk in a browser core;
fig. 2 is a schematic diagram of a working flow of a disk cache in a browser kernel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
In any embodiment, as shown in fig. 1-2, the invention adopts the following technical scheme:
fig. 1 is a disk cache optimization module of a browser kernel, wherein the second layer "network state and Url request state detection", "cache operation", and "index information synchronization" are three major information modules that need to be solved.
The third layer is a part of the specific implementation technical scheme and mainly comprises a computing unit.
The fourth layer is another part in the specific implementation technical scheme, and optimizes the operation of the browser on the local disk cache according to the calculation result, including the application and the update of the cache and the update of the index table.
A.1.1.5.1 the method for optimizing a disk cache based on an Android system Cobalt kernel browser according to the patent specification mainly relates to three cache intervention operations and an update operation on a local cache file under a normal Url resource request, which are shown in fig. 2 respectively. When the Cobalt browser is started, two key data structures are created, one is used for recording the network state of a Url request object and the characteristic information value in the Url request process, and the characteristic information value is mainly used for judging whether the Url request process needs to be subjected to cache intervention operation by a cache module and is called a data structure A; and the index information is used for recording all caches, the index information comprises the size of each Url cache file, the md5 check value, the file type, the number of times of access, the last access time and the creation or update time, and is called a data structure B, and the browser kernel reads the existing cache information from the local disk medium and fills the cache information into the data structure B when starting.
A.1.1.5.2 when the browser detects a new network Url, it will create a new Url request object and initiate a network request operation, at this time, it will preferably make a judgment on the current network connection status of the browser, and record the judgment result in the data structure a in a.1.1.5.1, if the network connection is not normal, it will try to find other lines in 2. Entering a data structure B in A.1.1.5.1 to inquire whether the Url has cache data or not, if so, directly entering a browser layout manager, calculating a webpage Dom tree again, finding out the node position of the Url, changing the network Url address of the resource on the node into a path address of a local disk cache, changing the reading of the network Url resource by the browser into the reading of the local cache resource, and simultaneously recording the operation into the data structure B in A.1.1.5.1; if the cache is not available, the original request processing flow of the browser is not modified.
A.1.1.5.3 if the network connection state of the browser is normal, synchronously creating a timeout timer when creating the network Url connection, and if the data header information returned by the remote server is detected to have an error code, then trying other lines in 2. Under the condition of error codes, synchronously updating the characteristic information value of the data structure A in A.1.1.5.1, further inquiring whether cache data exist in the Url in the data structure B, if the cache data exist, directly correcting the error codes in the data header, modifying the error codes into correct error codes, abandoning the received error network data in the processing stage of the Url resources, reading a local offline disk cache file, simultaneously correcting the data type and the data length in the Url data processing unit, correcting the two parameter values into the same data type and the same data length as those of the local cache file, and then directly sending the read cache data into the Url data processing unit to perform corresponding decoding operation; if the cache is not available, the original request processing flow of the browser is not modified.
A.1.1.5.4 if the network connection state of the browser is normal, but the reception of network Url resources has exceeded the time of the timeout timer set in a.1.1.5.3, at which time the timeout operation will be triggered, then the other lines in fig. 2 will be tried. Inquiring whether the Url has cache data in a data structure B, if so, synchronously updating the characteristic information value of the data structure A in A.1.1.5.1, indicating that overtime occurs, carrying out overtime calibration on the Url connection, directly entering a browser layout manager, recalculating a webpage Dom tree, finding out the node position of the Url, changing the network Url address of the resource on the node into the path address of a local disk cache, changing the reading of the network Url resource by the browser into reading of a local cache resource, and simultaneously recording the operation into the data structure B in A.1.1.5.1; if the cache is not available, the original request processing flow of the browser is not modified.
A.1.1.5.5, if the current network connection state of the browser is normal, the network Url resource generates no error code in the request process, and the resource request is not overtime, it indicates that the network request of the Url resource is normal, at this time, when receiving network data, a section of space needs to be opened up in the memory, the browser will copy and sequentially add and store in the memory space each time it receives a data, at the stage that the network data is closed, it will be further judged whether the resource needs to be cached and updated.
Calculating the total length of data resources which should be received by the network Url connection, comparing the total length with the length of data backed up in a memory to see whether the total length is consistent, if the total length is inconsistent, indicating that the data is incomplete, directly discarding the data in the memory without processing, if the total length is consistent, entering data md5 check value calculation, then inquiring whether cache data of the Url resources exist in a local disk cache in a data structure B in A.1.1.5.1, if the cache data does not exist, indicating that the Url cache does not exist currently, needing to newly create a cache data, directly storing the network data resources backed up in the memory into a local disk medium, and synchronously updating the information of the data structure B in A.1.1.5.1; if the data exists, the current existing cache data of the Url needs to be judged whether the update operation needs to be carried out on the local cache, the md5 check value of the Url resource is read from the data structure B in A.1.1.5.1, whether the md5 check value and the data format of the new and old cache data are consistent or not is judged, if so, the new and old data are the same, the newly received network resource is not processed, the resource is directly released, if not, the webpage resource is updated, the network data resource backed up in the memory is stored in the local disk medium, and the information of the data structure B in A.1.1.5.1 is synchronously updated.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims. It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition. In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (6)
1. A disk cache optimization method for a Cobalt kernel browser in an Android system is characterized by comprising the following steps:
step 1, establishing a global data structure for storing each Url information processed by a browser;
step 2, establishing a global data structure for recording the cache information of the network resource in the local disk, wherein the data structure comprises the information of the absolute Url of the resource, the local storage path of the resource, the check value of the md5 of the resource, the size of the resource data, the type of the resource data, the access frequency of the resource and the access time of the resource;
step 3, when the browser creates a new Url link request, the browser firstly inquires the network connection state of the current equipment, creates a record message for recording the current network connection state aiming at the connection object, and simultaneously sets and starts a timer for judging whether the Url request object generates a resource request overtime or not, and the timer triggers a function to judge after the timer reaches the time;
step 4, if the network connection is not normal, entering a disk cache module to inquire whether the resource corresponding to the Url has web page cache data stored on a disk medium, if the cache resource exists, entering a browser layout manager, changing the Url information of the resource on the web page node into the local path information of the disk cache resource, changing the reading of the network Url resource by the browser into the reading of the local cache resource, and simultaneously recording the processing of the Url to the data structure created in the step 2;
step 5, if the network connection is normal, a space is created in the memory in the downloading stage of the webpage resources, and as the downloading transmission of the resources on the webpage can be performed in a segmented manner, a data segment is backed up and is transferred to the space created in the memory every time a segment of data is received;
step 6, when the Url connection is closed, calculating whether the total length of the data resources which should be received by the Url is consistent with the length of the data backed up in the memory, if not, abandoning the data in the memory and not processing the data, if the data are consistent, entering md5 check value calculation, searching whether the cache data of the Url resource exists in the local disk cache or not, if so, the md5 check value of the Url resource in the data structure of the storage cache information in the step 2 is read, judging whether the received md5 check value of the webpage resource is consistent with the md5 check value of the local identical Url cache data resource, if so, indicating that the new and old data are identical, not processing the newly received network resource, directly releasing the memory resource, if not, indicating that the webpage resource is updated, storing the newly received network data resource in the memory into a local disk medium, and updating the data structure of the cache information stored in the step 2;
and 7, if the network connection is abnormal, the overtime timer set in the step 3 plays a detection role, if the network state is good, the webpage resource can finish receiving data before the timer finishes timing, the overtime judgment is cancelled, if the network state is not good, the webpage resource cannot finish receiving data before the timer finishes timing, at the moment, the timer triggers an overtime judgment function, the browser judges that the current network module receives the data header information of the Url and partial requested data information, and simultaneously enters a disk cache module to inquire whether the resources corresponding to the Url have webpage cache data stored on a disk medium.
2. The method for optimizing the disk cache of the Android system Cobalt core browser according to claim 1, wherein in the step 1, the created data structure is used for recording state information of each network Url processed by the browser core in a resource request process, so as to provide an information basis for intervention operation of subsequent caching.
3. The method for optimizing the disk cache of the Android system Cobalt core browser according to claim 1, wherein in the step 2, the created data structure is used for recording index information of a browser core cache, when the browser is started, local record information is read and filled in the data structure, and the data structure is synchronously updated by the aid of the subsequently added cache, cache update and cache removal, so that the index data structure is guaranteed to be uniquely and effectively updated in the current browser in real time.
4. The method for optimizing the disk cache of the Android system Cobalt kernel browser according to claim 1, wherein in step 3, each network Url is an independent network request object, the judgment of the network connection state is helpful for providing a judgment basis for loading the cache for the browser at the first time, and the judgment result of the network state in the Url connection request is synchronously recorded in the data structure in step 1; if the network connection is abnormal, the browser directly enters step 4, whether the current browser has the cache of the Url is inquired from the data structure in step 2, if the current browser has the cache, the browser directly enters a browser layout manager, the network Url information of the resource on the webpage node is changed into the local path information of the disk cache resource, the browser is changed from reading the network Url resource to reading the local cache resource, and meanwhile, the operation is recorded to the data structure in step 2; if the network connection is normal, the browser creates a timer when initiating a network Url resource request, and the timer is used for judging whether the network data acceptance is overtime.
5. The method for optimizing the disk cache of the Cobalt kernel browser in the Android system according to claim 1, wherein the step 5 is performed under a normal network connection condition; when receiving network data, a section of space needs to be opened up in the memory, and when receiving network Url resources, the browser can backup a copy of data and store the data in the newly opened memory space; under the condition that the network state is relatively good, the data can be successfully downloaded within the timeout time set in the step 3, the step 6 is entered, when the data reception is completed, the network connection is to be closed, the total length of the data resource which should be received by the network Url is calculated, whether the total length is consistent with the length of the data backed up in the memory or not is calculated, if the total length is not consistent, the data in the memory is abandoned and is not processed, if the total length is consistent, the md5 check value calculation is entered, meanwhile, whether the cache data of the Url resource exists in the local disk cache is searched in the data structure of the step 2, if the cache data exists, the md5 check value of the Url resource is read from the data structure, whether the md5 check value and the data format of the new and old cache data are consistent or not is judged, if the check value and the data format are consistent, the new and old data are the same, the newly received network resource is not processed, the resource is directly released, if the check value is inconsistent, the web resource is updated, and (3) storing the newly received network data resources in the memory into the local disk medium, and synchronously updating the data structure information in the step (2).
6. The method for optimizing the disk cache of the Android system Cobalt kernel browser according to claim 1, wherein in step 7, when there is a network connection but a network is unstable, a problem may occur in a request process of opening a resource request of a network Url, and if the resource of the network Url cannot be downloaded within the timeout period set in step 3, or an error code exists in a data header returned by the network request, the data structure in step 1 is updated synchronously, and meanwhile, whether the Url has cache data locally is queried for the data structure in step 2; if the cache data exists, emptying the received network data, simultaneously modifying an error code in a data header returned by the network request, reading the cache data on the disk medium and format information of the data, directly pushing the read cache data into a data decoder related to the Url resource for decoding operation, and synchronously updating the operation to the data structure in the step 2; if the cache data does not exist, the request flow is not modified, and the processing flow of the browser is kept.
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