CN105204883A - Plug-in loading processing method and device - Google Patents

Plug-in loading processing method and device Download PDF

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Publication number
CN105204883A
CN105204883A CN201410299544.2A CN201410299544A CN105204883A CN 105204883 A CN105204883 A CN 105204883A CN 201410299544 A CN201410299544 A CN 201410299544A CN 105204883 A CN105204883 A CN 105204883A
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plug
shared library
unit
function
unit shared
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CN105204883B (en
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梁捷
邝耀宗
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Alibaba China Co Ltd
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Ucweb Inc
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Abstract

The invention discloses a plug-in loading processing method. The method includes the steps that when a plug-in shared library of a plug-in application program is initialized, a character string corresponding to function symbols of a set function in a character string table of the plug-in shared library is modified into a character string corresponding to function symbols of a function existing in a system library; in the plug-in loading process, the plug-in shared library with the modified character string table is loaded; the loaded plug-in shared library is called for executing operation. The invention provides a plug-in loading processing device correspondingly. According to the scheme, a browser can load plug-ins normally on an Android 4.4 platform or a platform with a higher version.

Description

A kind of plug-in unit loading processing method and device
Technical field
The present invention relates to mobile communication technology field, more specifically, relate to a kind of plug-in unit loading processing method and device.
Background technology
A lot of browser all can load various plug-in unit, to realize different functions at present.The flow process of existing browser loading of plug-in comprises step:
1, when browser resolves is to setting label such as the embed label or object label of HTML (HyperText Markup Language) page, the type property value according to embed label or object label finds the plug-in applications supporting this label.
2, the plug-in unit shared library file of NPAPI (NetscapePluginApplicationProgrammingInterface, the Netscape plug-in applications DLL (dynamic link library)) functional symbol obtaining the setting existed in this plug-in applications searched by browser; (note: NPAPI function has a lot, so-called " the NPAPI function of setting " is several NPAPI functions wherein here)
3, this plug-in unit shared library of browser dynamic load;
4, the browser NPAPI function called in this plug-in unit shared library carries out the work such as establishment, initialization of plug-in unit example.
But at present on new Android4.4 platform, browser cannot load Flash plug-in unit, Flash plug-in unit cannot be run on a web browser.This is because the plug-in unit shared library of Flash plug-in unit (AdobeFlashPlayerforAndroid) (libflashplayer.so file) cannot be loaded, the reason that cannot be loaded be in plug-in unit shared library one need the function imported from certain system library not this system library of Android4.4, that is Android4.4 platform does not provide this function.
Therefore, at present on Android4.4 and above platform, browser cannot normal load Flash plug-in unit.
Summary of the invention
In view of above-mentioned, the present invention proposes a kind of plug-in unit loading processing method and device, can on Android4.4 and above platform, make browser can normal load plug-in unit.
Technical scheme provided by the invention is as follows:
The invention provides a kind of plug-in unit loading processing method, comprise: when the plug-in unit shared library of initialization plug-in applications, the character string corresponding to the functional symbol of the setting function in the string table of described plug-in unit shared library is revised as the character string corresponding to functional symbol of the function existed in system library; When loading of plug-in, load the described plug-in unit shared library after described amendment string table; Call the plug-in unit shared library executable operations of described loading.
Preferably, wherein: described setting function is the function that plug-in unit shared library needs to import from other shared library.
Preferably, wherein: described when loading of plug-in, load the described plug-in unit shared library after described amendment string table to comprise: according to setting label lookup when resolving the page to corresponding plug-in applications, obtain in described plug-in applications the described plug-in unit shared library after having revised string table, load described plug-in unit shared library.
Preferably, described when the plug-in unit shared library of initialization plug-in applications, the character string corresponding to functional symbol character string corresponding to the functional symbol of the setting function in the string table of described plug-in unit shared library being revised as the function existed in system library comprises: when initialization plug-in unit shared library, by described plug-in unit shared library write new directory, and the character string corresponding to the functional symbol of the setting function in the string table of described plug-in unit shared library is revised as the character string corresponding to functional symbol of the function existed in Android system storehouse.
Preferably, wherein: described plug-in unit shared library is the plug-in unit shared library of Flash plug-in unit.
Preferably, wherein: the described function that exists in system library and described setting function compatible, at least meet with next condition: after modifying, it is unaffected that described plug-in unit shared library calls the execution flow process that described setting function relates to; The described function that exists in system library and described setting function have substituting.
The invention provides a kind of plug-in unit loading processing device, comprise: initialization module, for when the plug-in unit shared library of initialization plug-in applications, the character string corresponding to the functional symbol of the setting function in the string table of described plug-in unit shared library is revised as the character string corresponding to functional symbol of the function existed in system library; Load-on module, for when loading of plug-in, loads the described plug-in unit shared library after described amendment string table; Execution module, for calling the plug-in unit shared library executable operations of described loading.
Preferably, wherein: described load-on module, be according to resolve the page time setting label lookup to correspondence plug-in applications, obtain in described plug-in applications the described plug-in unit shared library after having revised string table, load described plug-in unit shared library.
Preferably, described plug-in unit loading processing device also comprises: new directory module, for providing new directory memory card shared library; Described initialization module is when initialization plug-in unit shared library, by described plug-in unit shared library write new directory, and the character string corresponding to the functional symbol of the setting function in the string table of described plug-in unit shared library is revised as the character string corresponding to functional symbol of the function existed in Android system storehouse.
Preferably, wherein: the plug-in unit shared library of described initialization module initializes is the plug-in unit shared library of Flash plug-in unit.
Utilize technique scheme, the present invention is when the plug-in unit shared library of initialization plug-in applications, character string corresponding for the setting functional symbol of string table in described plug-in unit shared library is revised as the functional symbol existed in Android system storehouse, like this when loading of plug-in, because amended functional symbol is all exist in Android system storehouse, therefore can avoid in prior art because load failed problem at Android system library lookup less than functional symbol, thus successfully can load the described plug-in unit shared library after Modification growth function sign character string, and then make plug-in unit can normal load.
In order to realize above-mentioned and relevant object, will describe in detail and the feature particularly pointed out in the claims after one or more aspect of the present invention comprises.Explanation below and accompanying drawing describe some illustrative aspects of the present invention in detail.But what these aspects indicated is only some modes that can use in the various modes of principle of the present invention.In addition, the present invention is intended to comprise all these aspects and their equivalent.
Accompanying drawing explanation
According to following detailed description of carrying out with reference to accompanying drawing, above and other object of the present invention, feature and advantage will become more apparent.In the accompanying drawings:
Fig. 1 is the first pass schematic diagram of the inventive method;
Fig. 2 is second schematic flow sheet of the inventive method;
Fig. 3 is the block diagram of apparatus of the present invention;
Fig. 4 is the block diagram of mobile terminal of the present invention.
Label identical in all of the figs indicates similar or corresponding feature or function.
Embodiment
Various aspects of the present disclosure are described below.It is to be understood that instruction herein can with varied form imbody, and in this article disclosed any concrete structure, function or both be only representational.Based on instruction herein, those skilled in the art are it is to be understood that an aspect disclosed herein can realize independent of any other side, and the two or more aspects in these aspects can combine according to various mode.Such as, aspect, implement device or the hands-on approach of any number described in this paper can be used.In addition, other structure, function or except one or more aspect described in this paper or be not the 26S Proteasome Structure and Function of one or more aspect described in this paper can be used, realize this device or put into practice this method.In addition, any aspect described herein can comprise at least one element of claim.
Scheme provided by the invention, can make the plug-in unit shared library of Flash plug-in unit can normal load on Android4.4, thus solves the problem that current each browser cannot run Flash plug-in unit on Android4.4 platform.
Main thought of the present invention is: if employ for plug-in unit shared library the function that some has not existed respective function realization in system, browser is before this plug-in unit shared library of loading, by the character string corresponding to the functional symbol of this function in the string table of plug-in unit shared library, be revised as the character string that the functional symbol of other functions is corresponding, these other function is exist in system, then loads the plug-in unit shared library after containing amendment string table.After such process, because the system function relied in plug-in unit shared library all exists in system, therefore can load successfully, can not occur because can not find the system library of function and the problem of loading failure that causes, thus make can load and run Flash plug-in unit on Android4.4 platform.It should be noted that, each function has functional symbol, and each functional symbol has corresponding character string in the string table of shared library.
The present invention carries out above-mentioned amendment, need meet compatibility, specifically meet the following conditions: 1, before and after amendment, and the execution flow process called in plug-in unit shared library involved by setting function (old function) can not be affected; 2, old function and the new function for substituting can substitute mutually, that is function signature need keep consistance in a way, can meet following condition: the number of all input parameters of (1) new, old function needs identical with type; (2) if the rreturn value type of old function is not void, then newly, the rreturn value type of old function also needs identical; (3) if old function is the member method of certain C++ class, then the new function for substituting also needs to be the member method of same C++ class.
Each embodiment of the present invention is described below with reference to accompanying drawings.
Fig. 1 is the first pass schematic diagram of the inventive method.
As shown in Figure 1, step is comprised:
Step 101, when the plug-in unit shared library of initialization plug-in applications, the character string corresponding to the functional symbol of the setting function of string table in described plug-in unit shared library is revised as the character string corresponding to functional symbol of the function existed in system library.
The function existed in this system library is compatible with setting function.This system library refers to Android system storehouse.
Wherein, described setting function is import function, and import function refers to that shared library needs the function imported from other shared library, and the function namely called in shared library, the realization of this function is in other shared library.
Wherein, described plug-in unit shared library is the plug-in unit shared library of Flash plug-in unit.
Concrete, this step is when initialization plug-in unit shared library, by described plug-in unit shared library write new directory, and the character string corresponding to the functional symbol of the setting function of string table in described plug-in unit shared library is revised as the character string corresponding with the functional symbol of the function of setting function compatibility existed in Android system storehouse.
Step 102, when loading of plug-in, load amendment string table after described plug-in unit shared library.
Wherein, this step is that obtain in described plug-in applications the described plug-in unit shared library after having revised string table, the described plug-in unit shared library after string table is revised in loading according to setting label lookup when resolving the page to corresponding plug-in applications.
Step 103, call the plug-in unit shared library executable operations of described loading.
Can find, utilize technique scheme, the present invention is when the plug-in unit shared library of initialization plug-in applications, character string corresponding to the functional symbol of the setting function of string table in described plug-in unit shared library is revised as the character string corresponding to functional symbol of the function existed in Android system storehouse, like this when loading of plug-in, because the function corresponding to amended character string is all exist in Android system storehouse, therefore can avoid in prior art because load failed problem at Android system library lookup less than function, thus the described plug-in unit shared library that can successfully load after amendment string table, and then make plug-in unit can normal load.
Fig. 2 is second schematic flow sheet of the inventive method.Fig. 2 more describes the solution of the present invention in detail compared to Fig. 1.
As shown in Figure 2, step is comprised:
Step 201, when initialization Flash plug-in unit shared library, by Flash plug-in unit shared library write new directory, and the character string corresponding to the functional symbol of the import function of string table in Flash plug-in unit shared library is revised as the character string corresponding to functional symbol of the function existed in Android system.
Browser is when initialization Flash plug-in unit shared library, read Flash plug-in unit shared library, and Flash plug-in unit shared library is written in the new directory that browser can write, simultaneously by the character string corresponding to the functional symbol of the import function of string table in Flash plug-in unit shared library, be revised as the character string corresponding to functional symbol of the function existed in Android system.
Consider and the character string corresponding to the functional symbol in the string table to Flash plug-in unit shared library is revised to some extent, therefore Flash plug-in unit shared library is written in the new directory that browser can write, to distinguish with original Flash plug-in unit shared library by the present invention.
Illustrate: the definition of the old function of needs amendment is:
voidVectorImpl::reservedVectorImpl1();
voidVectorImpl::reservedVectorImpl2();
voidVectorImpl::reservedVectorImpl3();
voidVectorImpl::reservedVectorImpl4();
voidVectorImpl::reservedVectorImpl5();
voidVectorImpl::reservedVectorImpl6();
voidVectorImpl::reservedVectorImpl7();
voidVectorImpl::reservedVectorImpl8();
In plug-in unit shared library, the functional symbol corresponding to above-mentioned old function is:
_ZN7android10VectorImpl19reservVectorImpl1Ev
_ZN7android10VectorImpl19reservVectorImpl2Ev
_ZN7android10VectorImpl19reservVectorImpl3Ev
_ZN7android10VectorImpl19reservVectorImpl4Ev
_ZN7android10VectorImpl19reservVectorImpl5Ev
_ZN7android10VectorImpl19reservVectorImpl6Ev
_ZN7android10VectorImpl19reservVectorImpl7Ev
_ZN7android10VectorImpl19reservVectorImpl8Ev
Old function is all replaced to following new function by the present invention:
VoidVectorImpl::capacity (); (this is function definition)
Functional symbol corresponding to new function is:
_ZNK7android10VectorImpl8capacityEv
It should be noted that, about the import function of plug-in unit shared library, in the version before its tangible Android4.4 system library, the function that system library provides is embodied as sky.Since the function of its correspondence is embodied as sky, what does not do, therefore just can consider to revise the character string corresponding to functional symbol in string table, make the character string corresponding to functional symbol of another one function into, as long as this function corresponding to amended character string is present in Android4.4 system library, and compatible with old function.Namely as previously described, above-mentioned amendment meets the following conditions as far as possible: 1, before and after amendment, and the execution flow process called in plug-in unit shared library involved by setting function (old function) can not be affected; 2, old function and the new function for substituting can substitute mutually, that is function signature need keep consistance in a way, can meet following condition: the number of all input parameters of (1) new, old function needs identical with type; (2) if the rreturn value type of old function is not void, then newly, the rreturn value type of old function also needs identical; (3) if old function is the member method of certain C++ class, then the new function for substituting also needs to be the member method of same C++ class.
Step 202, load Flash plug-in unit time, load amendment string table after Flash plug-in unit shared library.
This step specifically comprises: according to setting label when resolving the page if embed label lookup is to corresponding plug-in applications, obtain in described plug-in applications the described plug-in unit shared library after having revised string table, load the described plug-in unit shared library after amendment string table.
The inventive method does not need really to revise system function, only need revise the character string corresponding to functional symbol of the setting function in the string table of Flash plug-in unit shared library, and in system, there is corresponding function realization in the new function corresponding to this amended character string.
If do not revise the character string corresponding to functional symbol of the setting function in the string table of Flash plug-in unit shared library, then because original setting function can not find on Android4.4 system library, namely corresponding function is not had to realize, so browser can load failure when loading Flash plug-in unit shared library.
And after the inventive method have modified string table, because the new function corresponding to amended character string can find on Android4.4 system library, therefore browser just can successfully load when loading Flash plug-in unit shared library.
In this step, when browser finds the plug-in unit shared library that there is specific NPAPI functional symbol, then the dlopen interface of calling system carrys out this plug-in unit shared library of dynamic load, then the loading flow process of plug-in unit shared library is completed by operating system itself, if load unsuccessfully, dlopen interface returns false, otherwise returns true.
When operating system loading of plug-in shared library, this system shared library required for plug-in unit shared library can be loaded, search system function symbol that plug-in unit shared library imports simultaneously whether in system shared library, if search less than; load failure.
Step 203, the NPAPI function called in this plug-in unit shared library carry out the work such as establishment, initialization of plug-in unit example.
After browser success loading of plug-in shared library, the browser relevant NPAPI function called in plug-in unit shared library carries out the work such as establishment, initialization of plug-in unit example, thus completes the operation of Flash plug-in unit.
Above-mentionedly describe method flow of the present invention in detail, accordingly, the present invention is corresponding provides a kind of plug-in unit loading processing device.
Fig. 3 is apparatus structure schematic diagram of the present invention.
As shown in Figure 3, plug-in unit loading processing device 30 of the present invention comprises: initialization module 301, load-on module 302, execution module 303.
Initialization module 301, for when the plug-in unit shared library of initialization plug-in applications, the character string corresponding to the functional symbol of the setting function in the string table of described plug-in unit shared library is revised as the character string corresponding to functional symbol of the function existed in system library;
Load-on module 302, for when loading of plug-in, loads the described plug-in unit shared library after described amendment string table;
Execution module 303, for calling the plug-in unit shared library executable operations of described loading.
Described load-on module 302, be according to resolve the page time setting label lookup to correspondence plug-in applications, obtain in described plug-in applications the described plug-in unit shared library after having revised string table, load described plug-in unit shared library.
Further, described plug-in unit loading processing device also comprises: new directory module (not shown).
New directory module, for providing new directory memory card shared library;
Described initialization module 301 is when initialization plug-in unit shared library, by described plug-in unit shared library write new directory, and the character string corresponding to the functional symbol of the setting function in the string table of described plug-in unit shared library is revised as the character string corresponding to functional symbol of the function existed in Android system storehouse.
Interactive relation between above-mentioned each unit, see the description of previous methods process flow diagram, can repeat no more herein.
The present invention is also corresponding provides a kind of mobile terminal.Fig. 4 is the structural representation of mobile terminal of the present invention.As shown in Figure 4, this mobile terminal 40 comprises the plug-in unit loading processing device 30 of foregoing description.The structure of this device 30 is concrete as shown in Figure 3, repeats no more herein.
In addition, typically, mobile terminal of the present invention can be the various hand-held terminal device with Bluetooth function, such as, have the mobile phone of Bluetooth function, personal digital assistant (PDA).
In addition, the computer program performed by the processor (such as CPU) in mobile terminal can also be implemented as according to method of the present invention, and store in a memory in the mobile terminal.When this computer program is executed by processor, perform the above-mentioned functions limited in method of the present invention.
In addition, a kind of computer program can also be embodied as according to method of the present invention, this computer program comprises computer-readable medium, stores the computer program for performing the above-mentioned functions limited in method of the present invention on the computer-readable medium.
In addition, said method step and system unit also can utilize controller and realize for storing the computer readable storage devices making controller realize the computer program of above-mentioned steps or Elementary Function.
Those skilled in the art will also understand is that, may be implemented as electronic hardware, computer software or both combinations in conjunction with various illustrative logical blocks, module, circuit and the algorithm steps described by disclosure herein.In order to this interchangeability of hardware and software is clearly described, the function with regard to various exemplary components, square, module, circuit and step has carried out general description to it.This function is implemented as software or is implemented as hardware and depends on embody rule and be applied to the design constraint of whole system.Those skilled in the art can realize described function in every way for often kind of embody rule, but this realization determines should not be interpreted as causing departing from the scope of the present invention.
Although disclosed content shows exemplary embodiment of the present invention above, it should be noted that under the prerequisite not deviating from the scope of the present invention that claim limits, can multiple change and amendment be carried out.Need not perform with any particular order according to the function of the claim to a method of inventive embodiments described herein, step and/or action.In addition, although element of the present invention can describe or requirement with individual form, also it is contemplated that multiple, is odd number unless explicitly limited.
Although describe each embodiment according to the present invention above with reference to figure to be described, it will be appreciated by those skilled in the art that each embodiment that the invention described above is proposed, various improvement can also be made on the basis not departing from content of the present invention.

Claims (10)

1. a plug-in unit loading processing method, comprising:
When the plug-in unit shared library of initialization plug-in applications, the character string corresponding to the functional symbol of the setting function in the string table of described plug-in unit shared library is revised as the character string corresponding to functional symbol of the function existed in system library;
When loading of plug-in, load the described plug-in unit shared library after described amendment string table;
Call the plug-in unit shared library executable operations of described loading.
2. plug-in unit loading processing method according to claim 1, wherein:
Described setting function is the function that plug-in unit shared library needs to import from other shared library.
3. plug-in unit loading processing method according to claim 1, wherein:
Described when loading of plug-in, load the described plug-in unit shared library after described amendment string table and comprise:
According to setting label lookup when resolving the page to corresponding plug-in applications, obtain in described plug-in applications the described plug-in unit shared library after having revised string table, load described plug-in unit shared library.
4. the plug-in unit loading processing method according to any one of claims 1 to 3, described when the plug-in unit shared library of initialization plug-in applications, the character string corresponding to the functional symbol character string corresponding to the functional symbol of the setting function in the string table of described plug-in unit shared library being revised as the function existed in system library comprises:
When initialization plug-in unit shared library, by described plug-in unit shared library write new directory, and the character string corresponding to the functional symbol of the setting function in the string table of described plug-in unit shared library is revised as the character string corresponding to functional symbol of the function existed in Android system storehouse.
5. the plug-in unit loading processing method according to any one of claims 1 to 3, wherein:
Described plug-in unit shared library is the plug-in unit shared library of Flash plug-in unit.
6. the plug-in unit loading processing method according to any one of claims 1 to 3, wherein:
The described function that exists in system library and described setting function compatible, at least meet with next condition:
After modifying, it is unaffected that described plug-in unit shared library calls the execution flow process that described setting function relates to;
The described function that exists in system library and described setting function have substituting.
7. a plug-in unit loading processing device, comprising:
Initialization module, for when the plug-in unit shared library of initialization plug-in applications, the character string corresponding to the functional symbol of the setting function in the string table of described plug-in unit shared library is revised as the character string corresponding to functional symbol of the function existed in system library;
Load-on module, for when loading of plug-in, loads the described plug-in unit shared library after described amendment string table;
Execution module, for calling the plug-in unit shared library executable operations of described loading.
8. plug-in unit loading processing device according to claim 7, wherein:
Described load-on module, be according to resolve the page time setting label lookup to correspondence plug-in applications, obtain in described plug-in applications the described plug-in unit shared library after having revised string table, load described plug-in unit shared library.
9. the plug-in unit loading processing device according to claim 7 or 8, also comprises:
New directory module, for providing new directory memory card shared library;
Described initialization module is when initialization plug-in unit shared library, by described plug-in unit shared library write new directory, and the character string corresponding to the functional symbol of the setting function in the string table of described plug-in unit shared library is revised as the character string corresponding to functional symbol of the function existed in Android system storehouse.
10. the plug-in unit loading processing device according to claim 7 or 8, wherein:
The plug-in unit shared library of described initialization module initializes is the plug-in unit shared library of Flash plug-in unit.
CN201410299544.2A 2014-06-26 2014-06-26 A kind of plug-in unit loading processing method and device Active CN105204883B (en)

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