CN103258055B - A kind of file download equipment and method - Google Patents

Abstract

The present invention provides a file downloading device, comprising: a webpage parsing module, adapted to receive a call request from the page for a file when a webpage is loaded on the browser side; a file judging module, adapted to judge whether the file exists in In the file storage unit preset on the browser side; and a file download module, adapted to obtain the file directly from the file storage unit when the file exists, and obtain the file according to the calling request when the file does not exist The server corresponding to the web page downloads the file. The invention also provides a corresponding file downloading method. According to the present invention, some network resources are built in the browser side, which improves the response speed of the website.

Description

A file downloading device and method

technical field

The invention relates to the field of the Internet, in particular to a file downloading device and a corresponding file downloading method.

Background technique

According to statistics, more than 55% of the top 10,000 most visited websites in the world are using jQuery, which is a free, open source javascript library compatible with multiple browsers, which allows developers to more easily Process HTML documents, events and achieve animation effects, etc., and easily develop powerful static or dynamic web pages.

When a user browses a website with a browser, the browser will automatically download the jQuery script library from the website, so that the local webpage can present a variety of js interactive effects; it may take some time for the browser to automatically download the jQuery script library from the website. Especially when the network status is not good, the time spent will significantly affect the response speed of the web page and prolong the user's waiting time.

In order to improve the website access speed, the local client will automatically store the visited website content in the cache of the local browser. Once the website is accessed again, the website content can be directly fetched from the local cache for loading and displaying. The caching mechanism of the browser itself can enable the client to directly call from the local cache when accessing the same network resource for the second time, but the user must download the network resource from the network when accessing the network resource for the first time. Therefore, for a new user visiting for the first time, downloading the network resource will definitely cause a certain response delay.

Contents of the invention

In view of the above problems, the present invention provides a file downloading device and a corresponding file downloading method, so as to overcome the above problems or at least partly solve the above problems.

According to one aspect of the present invention, a file download device is provided, comprising:

The web page parsing module is suitable for receiving the calling request of the page for the file when the web page is loaded on the browser side;

A file judging module, adapted to judge whether the file exists in the file storage unit preset on the browser side; and

File download module, suitable for

If the file exists, obtaining the file directly from the file storage unit; and

If the file does not exist, the file is downloaded from the server corresponding to the web page according to the calling request.

Optionally, multiple files named after their specific attribute values are stored in the file storage unit, wherein the file judging module is adapted to include a file name matching the file in the file storage unit according to whether the call request contains to determine whether the file exists.

Optionally, the file judging module is adapted to: if the call request contains a specific field, and the value associated with the specific field matches the file name of the file in the file storage unit, then judge that the file exists ; If the value associated with the specific field contained in the call request does not match the file name of the file in the file storage unit, or the call request does not contain the specific field, then determine that the file does not exist.

Optionally, the file downloading device also includes:

The file name calculation module is adapted to obtain the specific attribute value of the file downloaded by the file download module, and the file storage module is adapted to match the value of the specific field included in the call request if the file attribute value matches the value of the specified field in the call request. The downloaded file is stored in the file storage unit and named after the specific attribute value; and if the file attribute value does not match the value of the specific field contained in the call request, the downloaded file is not stored.

Optionally, the specific attribute value is a value obtained after performing a hash calculation on the file content.

Optionally, the file is a javascript script file.

According to another aspect of the present invention, a file download method is provided, comprising:

When the web page is loaded on the browser side, receiving the calling request of the page for the file;

Judging whether the file exists in the file storage unit preset on the browser side;

If the file exists, obtaining the file directly from the storage unit; and

If the file does not exist, the file is downloaded from the server corresponding to the web page according to the calling request.

Optionally, multiple files named after their specific attribute values are stored in the file storage unit, wherein the judging step judges whether Said file exists.

Optionally, the judging step includes: if the call request contains a specific field, and the value associated with the specific field matches the file name of the file in the file storage unit, then judging that the file exists; and If the value associated with the specific field contained in the call request does not match the file name of the file in the file storage unit, or the call request does not contain the specific field, it is determined that the file does not exist.

Optionally, the file download method further includes: obtaining a specific attribute value of the downloaded file, and if the file attribute value matches the value of a specific field contained in the call request, storing the file in the file storage unit The downloaded file is named after the specific attribute value; if the file attribute value does not match the value of the specific field contained in the call request, the downloaded file is not stored.

Optionally, the specific attribute value is a value obtained after performing a hash calculation on the file content.

Optionally, the file is a javascript script file.

The file downloading device and the corresponding file downloading method provided by the present invention preset a file storage unit containing multiple files locally, so that when the browser needs to call a file when accessing a network page, it first searches whether there is a file in the local file storage unit. If the required file to be called exists, it will directly call the local file without downloading it from the network, so as to avoid the long response time of the webpage caused by the browser downloading the file from the website server, and the fast webpage response Speed can greatly improve user experience satisfaction.

Further, the file downloading device and method provided by the present invention verify the correctness of the downloaded file through the specific attribute value of the downloaded file; if it is correct, it is stored in the file storage unit, realizing the The security addition also enables the file downloading device and method of the present invention to save more downloading time of network resources.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the specific embodiments of the present invention are enumerated below.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:

FIG. 1 shows a schematic structural diagram of a file downloading device according to an embodiment of the present invention; and

Fig. 2 shows a schematic flowchart of a file downloading method according to an embodiment of the present invention.

detailed description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

Fig. 1 shows a schematic structural diagram of a file downloading device according to an embodiment of the present invention, including: a web page parsing module 101, a file judging module 102, a file downloading module 103, a file storage unit 104, a file name calculation module 105 and a file storage module 106. In the present invention, the file downloading device may be a computer browser terminal, or other electronic devices capable of accessing the Internet for web browsing such as mobile phones.

The user loads the page of website A http://www.a.com/index.htm on the browser side, and the content of the page is:

<html>

<script

src="http://www.a.com/jquery-1.7.1.min.js?localFile=abcdabcd.js"></script>

<font>Helloworld!</font>

</html>

Among them, jquery-1.7.1.min.js is the javascript script file to be called to load the website A, localFile is a specific field contained in it, and its value is abcdabcd.js.

At this time, the webpage parsing module 101 receives the call request of the website A page to the javascript script file jquery-1.7.1.min.js. Usually, the browser side needs to download the script file from the web server side, so that the A website page can display the JS interaction effect.

The inventor has noticed that this javascript script file is a common network resource, and its content is standard. It is not necessary for all users who visit the A website page for the first time to download the script file. Waste, the second is how much it will respond to the browser's response speed to the webpage, especially when the network condition is not very good.

According to the file downloading device of the embodiment of the present invention, a file storage unit 104 is provided, in which are stored a plurality of common network resources of content standards, such as javascript script files of jquery-1.7.1.min.js. In this way, when the webpage is loaded by the browser, the script file in the local file storage unit 104 can be used instead of downloading the file from the network server side, thereby increasing the network access speed.

In the file storage unit 104, the stored script files are all named after their specific attribute values, so that the contents of the script files can uniquely and correctly correspond to their file names. In this embodiment, the specific attribute value is a value after hash calculation is performed on the file content, more specifically, the specific attribute value is an md5 value obtained after performing md5 calculation on the file content.

Optionally, the file storage unit 104 may be a storage unit set under the browser installation directory, or may also be set under a subdirectory of the browser installation directory.

Next, the file judging module 102 judges whether the file exists in the file storage unit 104 according to the calling request. In the above loading of the A website page, the script file invocation request received by the web page analysis module 101 is http://www.a.com/jquery-1.7.1.min.js?localFile=abcdabcd.js. In this case, the file judging module 102 matches the localFile field value abcdabcd.js with the file names of the files stored in the file storage unit 104 , thereby judging whether there is a script file to be called in the file storage unit 104 . In the present embodiment, if the script file name in the file storage unit 104 matches abcdabcd.js, then it is judged that there is a script file jquery-1.7.1.min.js that needs to be called to load the A website webpage; if not match, it is judged that the script file does not exist.

Of course, if the call request does not include the specific field localFile, the file judging module 102 also judges that the file to be called does not exist in the file storage unit 104 .

If there is a file to be called in the file storage unit 104, the browser directly obtains the file from the file storage unit 104 and loads it, and the page of the website A can display the interactive effect of the JS.

If there is no file to be called in the file storage unit 104, the file download module 103 downloads the file from the server responsible for providing the file according to the call request, and then the browser loads and displays the file.

Furthermore, the file downloading device of the present invention also includes a file name calculation module 105, which is used to calculate the specific attribute value of the file downloaded by the file download module 103; in this embodiment, the file name calculation module 105 uses the The hash algorithm calculates the downloaded file to obtain its specific attribute value.

The file downloading device can also include a file storage module 106, which compares the specific attribute value of the downloaded file calculated by the file name calculation module 105 with the value of the specific field localFile in the call request, and if the two match, determine the downloaded file. The file content is not modified, it is a script file of standard content, then store the downloaded file in the file storage unit 104 and name it with the specific attribute value; if the calculated specific attribute value is consistent with the specific field localFile value does not match, it is judged that the content of the downloaded file has been modified (maliciously or benignly), and the script file with non-standard content will not store the downloaded file.

In the description of this embodiment, javascript script files are used as an example, but those skilled in the art understand that the files involved in the file download device of the present invention are not limited to javascript script files, and can also include all other files that need to be downloaded from the server side. The file to call.

Fig. 2 shows a schematic flowchart of a file downloading method according to another embodiment of the present invention, the method is suitable for being executed in a file downloading device. The method begins in step 201, and in step S201, when the browser side loads the A website page of the embodiment shown in Figure 1, the page of the A website to the javascript script file jquery-1.7.1.min.js is received An invocation request, optionally, the invocation request further includes a specific field localFile and its value. Subsequently, in step 202, it is determined whether the requested file exists in the file downloading device (for example, in the file storage unit 104 of the file downloading device) according to the call request received in step S201.

Specifically, it is judged whether the requested file exists according to whether the calling request includes a file name matching the file in the file downloading device. According to an embodiment of the present invention, if the call request contains a specific field, and the value associated with the specific field matches the file name of the file in the file download, it is determined that the file exists; If the value associated with the specific field does not match the file name of the file in the file download device, or the call request does not contain the specific field, then it is determined that the requested file does not exist.

Next, if there is a script file to be called, go to step 203, directly obtain the file locally and load it through the browser;

On the other hand, if there is no script file to be called, go to step 204, and download the file from the corresponding server according to the call request.

After downloading the file, go to step 205 to obtain the specific attribute value of the downloaded file; in this embodiment, calculate the downloaded file through a hash algorithm such as md5 to obtain its specific attribute value.

Next, in step 206, it is judged whether the specific attribute value of the file matches the value of the specific field included in the call request;

If it matches, enter step 207, store the downloaded file locally and name it with the specific attribute value;

If not, go directly to step 208 and end, without saving the downloaded file.

The file downloading device and corresponding file downloading method provided by the present invention actually propose a protocol for replacing network resources with local files. According to this agreement, the file storage unit is preset locally to store network resources such as script files, and the script files are named after their specific attribute values (such as md5 values); A field, for example, the field name is localFile, and the field is assigned with a specific attribute value (such as an md5 value) of the script file. In this way, when the browser accesses the website using the protocol, it can directly call the script file in the file storage unit, reducing the downloading of the script file from the website and improving the response speed of the visit.

Further, since the files stored in the file storage unit of the present invention are all named after their specific attribute values (such as md5 values), the reliability of the called files is guaranteed through the verification of the localFile field in the call request, so that the website uses its own At the same time as the reliable resources of the network, there is also the opportunity to call network resources from other sources more quickly.

B11. The method according to any one of B7-10, wherein the specific attribute value is a value obtained after performing hash calculation on the file content. B12. The method as described in any one of B7-11, wherein the file is a javascript script file.

The algorithms and displays presented herein are not inherently related to any particular computer, virtual system, or other device. Various generic systems can also be used with the teachings based on this. The structure required to construct such a system is apparent from the above description. Furthermore, the present invention is not specific to any particular programming language. It should be understood that various programming languages can be used to implement the content of the present invention described herein, and the above description of specific languages is for disclosing the best mode of the present invention.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, in order to streamline this disclosure and to facilitate an understanding of one or more of the various inventive aspects, various features of the invention are sometimes grouped together in a single embodiment, figure, or its description. This method of disclosure, however, is not to be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the Detailed Description are hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art can understand that the modules in the device in the embodiment can be adaptively changed and arranged in one or more devices different from the embodiment. Modules or units or components in the embodiments may be combined into one module or unit or component, and furthermore may be divided into a plurality of sub-modules or sub-units or sub-assemblies. All features disclosed in this specification (including accompanying claims, abstract and drawings), as well as any method or method so disclosed, may be used in any combination, except that at least some of such features and/or processes or units are mutually exclusive. All processes or units of equipment are combined. Each feature disclosed in this specification (including accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will understand that although some embodiments described herein include some features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of the invention. and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.

The various component embodiments of the present invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all functions of some or all components in the device according to the embodiments of the present invention. The present invention can also be implemented as an apparatus or an apparatus program (for example, a computer program and a computer program product) for performing a part or all of the methods described herein. Such a program for realizing the present invention may be stored on a computer-readable medium, or may be in the form of one or more signals. Such a signal may be downloaded from an Internet site, or provided on a carrier signal, or provided in any other form.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

Claims (6)

1. a file download equipment, comprises

Webpage parsing module, is suitable for, in the time of the browser side Web page loading page, receiving the described pageTo the call request of file;

File judge module, is suitable for judging whether described file is present in browser side presetIn file storage unit; In described file storage unit, store with the name of its particular attribute-valueMultiple files, wherein whether file judge module is suitable for comprising with described according to described call requestThe filename that file in file storage unit matches judges whether to exist described file; InstituteStating file judge module is further adapted for: if described call request comprises specific fields, and with instituteThe filename of stating the file in value and the file storage unit that specific fields is associated matches,There is described file in judgement; If the value that the specific fields that described call request comprises is associated withThe filename of the file in described file storage unit does not mate, or described call request does not compriseDescribed specific fields, there is not described file in judgement;

File download module, is suitable for: if there is described file, directly from described file storageIn unit, obtain described file; If there is not described file, download according to described call requestDescribed file;

Described file download equipment also comprises

Filename computing module, is suitable for obtaining the specific of file that described file download module downloadsProperty value, and

File storage module, is suitable for: if the particular attribute-value of described file and described call requestThe value of the specific fields comprising matches, and in file storage unit, stores downloaded fileAnd with this particular attribute-value name; If the particular attribute-value of described file and described call request bagThe value of the specific fields containing is not mated, and does not store downloaded file.

2. equipment as claimed in claim 1, wherein said particular attribute-value is to file contentCarry out the value obtaining after Hash calculation.

3. as the equipment as described in any in claim 1-2, wherein said file isJavascript script file.

4. a document down loading method, comprises

In the time of the browser side Web page loading page, receive the call request of the described page to file;

Judge whether described file is present in the preset file storage unit of browser side; DescribedIn file storage unit, store the multiple files with its particular attribute-value name, wherein judgement stepSuddenly according to described call request whether comprise with described file storage unit in file matchFilename judges whether to exist described file; Further, if described call request comprises specificField, and the file of file in the value and the file storage unit that are associated with described specific fieldsName matches, and judgement exists described file; If the specific fields that described call request comprisesThe value being associated is not mated with the filename of the file in described file storage unit, or described tuneWith asking not comprise described specific fields, there is not described file in judgement;

If there is described file, directly from described memory cell, obtain described file; If noThere is described file, download institute according to described call request from server corresponding to described webpageState file;

Described document down loading method also comprises:

Obtain the particular attribute-value of downloaded file, and

If the value phase of the specific fields that the particular attribute-value of described file and described call request compriseCoupling is stored downloaded file and names with this particular attribute-value in file storage unit;If the value of the specific fields that the particular attribute-value of described file and described call request comprise is notJoin, do not store downloaded file.

5. method as claimed in claim 4, wherein said particular attribute-value is to file contentCarry out the value obtaining after Hash calculation.

6. as the method as described in arbitrary in claim 4-5, wherein said file isJavascript script file.