CN109922120A - Improve the method and terminal of DNS availability - Google Patents
Improve the method and terminal of DNS availability Download PDFInfo
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Abstract
The present embodiments relate to technical field of domain name resolution, disclose a kind of method and terminal for improving DNS availability.In the embodiment of the present invention, the method for improving DNS availability includes: to initiate DNS request respectively to preset primary dns server and alternative DNS server；If judging the response results for receiving primary dns server in time threshold, then, when the response results of primary dns server are available, using the response results of primary dns server as the corresponding domain name mapping result of DNS request, when the response results of primary dns server are unavailable, using the response results of the alternative DNS server received as the corresponding domain name mapping result of DNS request.The embodiment of the invention also provides a kind of terminals.Technical solution provided in an embodiment of the present invention, while guaranteeing resolution speed, it is ensured that the preferential parsing result for using primary dns server guarantees the dns resolution scheduling inside operator.
Description
Technical field
The present embodiments relate to technical field of domain name resolution, in particular to a kind of method for improving DNS availability and end
End.
Background technique
DNS (Domain Name System, domain name system), one mutually mapped as domain name and IP address on WWW
A distributed data base is able to use family and more easily accesses internet, remembers can be directly read by machine without spending
IP number string.By domain name, the process for finally obtaining the corresponding IP address of the domain name is called domain name mapping (or hostname resolution).
When dns server exception or configuration error etc., when domain name mapping being caused to fail, terminal can not be obtained correctly
IP is corresponded to domain name, will result in access failure, user can not correctly obtain resource.It is current to improve dns resolution success rate master
There is following two method: scheme 1, when the original dns resolution failure of user, is parsed using spare DNS；Scheme 2, when
When the original dns resolution of user fails, the DNS that modification user uses uses spare DNS as main DNS.
Inventor discovery at least there are the following problems in the prior art: at present improve dns resolution success rate method or
In domain name mapping failure, user needs to wait spare parsing time or with may changing the original dns server of user
Location, cause DNS scheduling result poor and some operators inside domain name can not parse.
Summary of the invention
Embodiment of the present invention is designed to provide a kind of method and terminal for improving DNS availability, so that guaranteeing
While resolution speed, it is ensured that the preferential parsing result for using primary dns server guarantees the dns resolution tune inside operator
Degree.
In order to solve the above technical problems, embodiments of the present invention provide a kind of method for improving DNS availability, packet
It includes: initiating DNS request respectively to preset primary dns server and alternative DNS server；Judge be in preset time threshold
The no response results for receiving the primary dns server；If receiving the sound of the primary dns server in the time threshold
It answers as a result, then, when the response results of the primary dns server are available, using the response results of the primary dns server as institute
The corresponding domain name mapping of DNS request is stated as a result, when the response results of the primary dns server are unavailable, the institute that will be received
The response results of alternative DNS server are stated as the corresponding domain name mapping result of the DNS request.
Embodiments of the present invention additionally provide a kind of terminal, comprising: at least one processor；And with it is described at least
The memory of one processor communication connection；Wherein, the memory be stored with can by least one described processor execute
Instruction, described instruction is executed by least one described processor, so that at least one described processor is able to carry out above-mentioned raising
The method of DNS availability.
Embodiments of the present invention additionally provide a kind of computer readable storage medium, are stored with computer program, described
The method of above-mentioned raising DNS availability is realized when computer program is executed by processor.
Embodiment of the present invention in terms of existing technologies, is initiated respectively to primary dns server and alternative DNS server
DNS request, and a time threshold has been preset, if receiving the response results of primary dns server in time threshold,
The response results that primary dns server is used in the available situation of the response results, only in the not available situation of the response results
The lower response results for just using alternative DNS server guarantee the parsing result for preferentially using primary dns server, guarantee operation
Dns resolution scheduling inside quotient；Simultaneously as DNS request is initiated respectively to primary dns server and alternative DNS server, because
This, alternative DNS server can as quickly as possible feedback response as a result, when receiving primary dns server in time threshold
When response results are unavailable, the response results of alternative DNS server can be received and used as quickly as possible, to guarantee to understand
Analyse speed.
In addition, if not receiving the response results of the primary dns server in the time threshold, when described
The response results that the response results of the alternative DNS server and the alternative DNS server are had received in time threshold are
When available, using the response results of the alternative DNS server as the corresponding domain name mapping of the DNS request as a result, when in institute
When stating the response results for not receiving the alternative DNS server in time threshold, judge first to connect after the time threshold
Whether the response results of the dns server received can be used；If the response results of the dns server first received are available,
Using the response results of the dns server first received as the corresponding domain name mapping result of the DNS request；If first receiving
The response results of the dns server arrived are unavailable, then the response results of the server received after are as described in
The corresponding domain name mapping result of DNS request；Wherein, the dns server is the primary dns server or the spare DNS clothes
Business device；When the response results and the spare DNS server for receiving the alternative DNS server in the time threshold
Response results be it is unavailable, using the response results of the primary dns server received after the time threshold as described in
The corresponding domain name mapping result of DNS request.Present embodiments provide for the sound for not receiving primary dns server in time threshold
Answer a kind of specific implementation when result.
In addition, if receive the response results of the primary dns server in the time threshold, and work as the main DNS
When the response results of server are unavailable, further includes: judge that the response results of the alternative DNS server received whether may be used
With；If the response results of the alternative DNS server received are available, enter the spare DNS that will be received
The response results of server are as the corresponding domain name mapping result of the DNS request；If the alternative DNS server received
Response results it is unavailable, then using the response results of the primary dns server as the corresponding domain name mapping knot of the DNS request
Fruit.In the present embodiment, in the response results of primary dns server and all not available situation of the response results of alternative DNS server
Under, or select using the response results of primary dns server as the corresponding domain name mapping of DNS request as a result, can equally make
In the case where at access failure, or preferably access path, the time that such user is unsuccessfully fed back can be shorter for selection
(if access fails, and can show error in terminal, and at this moment user may know that this access failure).
In addition, the quantity of the preset alternative DNS server is multiple；It is described to preset primary dns server and standby
DNS request is initiated respectively with dns server, specifically: Xiang Suoshu primary dns server and multiple alternative DNS servers point
It Fa Qi not DNS request；Whether the response results for judging the alternative DNS server received can be used, specifically, judgement
Whether at least one is available in the response results of the multiple alternative DNS servers received；If the multiple institutes received
It is available to state at least one in the response results of alternative DNS server, then the spare DNS server that will be received
Response results as the corresponding domain name mapping of the DNS request as a result, specifically, one of them is available described spare
The response results of dns server are as the corresponding domain name mapping result of the DNS request；If what is received is multiple described spare
The response results of dns server are all unavailable, then enter and request the response results of the primary dns server as the DNS
The step of corresponding domain name mapping result.In present embodiment, multiple alternative DNS servers are preset, DNS can be improved
Request is parsed into power.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the flow chart of the method for the raising DNS availability of first embodiment according to the present invention；
Fig. 2 is the flow chart of the method for the raising DNS availability of second embodiment according to the present invention；
Fig. 3 is the flow chart of the method for the raising DNS availability of third embodiment according to the present invention；
Fig. 4 is the flow chart of the method for the raising DNS availability of the 4th embodiment according to the present invention；
Fig. 5 is the block diagram of the terminal of the 5th embodiment according to the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Each embodiment be explained in detail.However, it will be understood by those skilled in the art that in each embodiment party of the present invention
In formula, in order to make the reader understand this application better, many technical details are proposed.But even if without these technical details
And various changes and modifications based on the following respective embodiments, the application technical solution claimed also may be implemented.
The first embodiment of the present invention is related to a kind of methods for improving DNS availability, including, it is taken to preset main DNS
Business device and alternative DNS server initiate DNS request；Judge the main DNS service whether is received in preset time threshold
The response results of device；If receiving the response results of primary dns server in preset time threshold, work as primary dns server
Response results it is available when, using the response results of primary dns server as the corresponding domain name mapping of the DNS request as a result, working as
When the response results of primary dns server are unavailable, asked the response results of the alternative DNS server received as the DNS
Seek corresponding domain name mapping result.
Present embodiment initiates DNS in terms of existing technologies, to primary dns server and alternative DNS server respectively
Request, and a time threshold has been preset, if receiving the response results of primary dns server in time threshold, in the sound
The response results that primary dns server is used in the available situation of result are answered, only in the not available situation of the response results
Using the response results of alternative DNS server, that is, guarantees the parsing result for preferentially using primary dns server, guarantee in operator
The dns resolution in portion is dispatched；Simultaneously as DNS request is initiated respectively to primary dns server and alternative DNS server, it is therefore, standby
With dns server can as quickly as possible feedback response as a result, when the response knot that receive in time threshold primary dns server
When fruit is unavailable, the response results of alternative DNS server can be received and used as quickly as possible, to ensure that parsing speed
Degree.
The realization details of the method for the raising DNS availability of present embodiment is specifically described below, it is interior below
Hold only for convenience of the realization details provided is understood, not implements the necessary of this programme.
Fig. 1 is the flow chart of the method for the raising DNS availability of present embodiment, specifically includes following steps.
Step 101, DNS request is initiated respectively to preset primary dns server and alternative DNS server.
The method of the raising DNS availability of the present embodiment is applied to terminal, such as mobile phone.When the need for receiving user's input
When the domain name to be accessed, terminal inner generates domain name mapping and requests DNS request.Specifically, terminal includes guiding module and DNS generation
Module is managed, DNS request is drained into DNS for filtering out DNS request from the various requests that terminal generates by guiding module
Proxy module.Terminal inner prestores the address of primary dns server and the address of alternative DNS server, and DNS proxy module can be with
DNS request is sent to primary dns server and alternative DNS server simultaneously.
Wherein, guiding module described here and DNS proxy module, are all functional modules, and each functional module is ok
It is interpreted as one section of program instruction, the corresponding function of each functional module can be realized in each section of program instruction after processor executes.
Step 102, judge the response results that primary dns server whether is received in preset time threshold；If so,
Enter step 103；If it is not, then entering step 104.
Step 103, judge whether the response results of primary dns server can be used；If it is not, then entering step 110；If so,
Enter step 106；
Step 104, judge the response results that alternative DNS server whether is had received in time threshold；If so, into
Enter step 105, if it is not, then entering step 107；
Step 105, judge whether the response results of the alternative DNS server received can be used；If so, entering step
111；If it is not, then entering step 112；
Step 106, using the response results of primary dns server as the corresponding domain name mapping result of DNS request.
Step 107, judge whether the response results of the dns server first received after time threshold can be used；If available,
Then enter step 108；If unavailable, 109 are entered step.
Wherein, dns server is primary dns server or alternative DNS server；
Step 108, using the response results of the dns server first received as the corresponding domain name mapping result of DNS request；
Step 109, the response results of the server received after are as the corresponding domain name mapping result of DNS request；
Step 110, using the response results of the alternative DNS server received as the corresponding domain name mapping knot of DNS request
Fruit；
Step 111, using the response results of alternative DNS server as the corresponding domain name mapping result of DNS request.
Step 112, corresponding using the response results of the primary dns server received after time threshold as DNS request
Domain name mapping result.
A time threshold is preset in terminal, that is, terminal is sent out respectively to primary dns server and alternative DNS server
Start timing after playing DNS request, in timing arrival time threshold value, if receiving the response results of primary dns server, says
The response of bright primary dns server, which may be considered, compares timely, at this point, paying the utmost attention to the response results of primary dns server.Tool
Body, if (judging result of step 103 is yes) can be used in the response results of primary dns server, just main DNS is serviced
The response results of device are as the corresponding domain name mapping result (step 106) of DNS request；If the response results of primary dns server
Unavailable (judging result of step 103 is no), then just using the response results of the alternative DNS server received as DNS
Request corresponding domain name mapping result (step 110), it should be noted that in the present embodiment, in step 110, no matter it receives
The response results of alternative DNS server whether can be with as the corresponding domain name mapping result of DNS request.
If not receiving the response results of primary dns server in time threshold, illustrate that the response of primary dns server goes out
Existing bigger delay, it may be possible to which primary dns server goes wrong or network transmission goes wrong, at this point, in order to obtain as early as possible
To the corresponding domain name mapping result of DNS request, it can be determined that whether have received alternative DNS server in time threshold
Response results (step 104).
If receiving the response results (judging result of step 104 is yes) of alternative DNS server, what judgement received
Whether available (the step 105) of the response results of alternative DNS server.If the response results of the alternative DNS server received are
(judging result of step 105 is yes) can be used, then the response results of the alternative DNS server are corresponding as DNS request
Domain name mapping result (step 111).The response results of the alternative DNS server received are unavailable (the judgement knot of step 105
Fruit is no), then using the response results of the primary dns server received after time threshold as the corresponding domain of DNS request
Name parsing result (step 112).
If receiving the response results (judging result of step 104 is no) of alternative DNS server, time threshold is judged
Whether available (the step 107) of the response results of the dns server first received later.If the sound of the dns server first received
Should result can be used (judging result of step 107 is yes), then using the response results of the dns server first received as DNS
Request corresponding domain name mapping result (i.e. step 108)；If unavailable (the step of the response results of the dns server first received
Rapid 107 judging result is no), then the response results of the dns server received after are as the corresponding domain name of DNS request
Parsing result (step 109).
Dns server described here can be primary dns server or alternative DNS server.Assuming that is first received is
The response results of primary dns server, then what is received afterwards is the response results of alternative DNS server；If first receiving main DNS
The response results of server are available, then the response results of primary dns server will first be received as the corresponding domain name of DNS request
Parsing result；If the response results for first receiving primary dns server are unavailable, then the alternative DNS server received by after
Response results as the corresponding domain name mapping result of DNS request.Assuming that is first received is the response knot of alternative DNS server
Fruit, then what is received afterwards is the response results of primary dns server；If the response results of the alternative DNS server first received can
With then using the response results of the alternative DNS server first received as the corresponding domain name mapping result of DNS request；If first
The response results of the alternative DNS server received are unavailable, then the response results of the dns server received after as
The corresponding domain name mapping result of DNS request.
In the present embodiment, comprising return code and parsing in the response results of primary dns server or alternative DNS server
IP；Judge whether the response results of primary dns server or alternative DNS server can be used, specifically can be such as under type: sentencing
Return code in disconnected response results directly determines the response results not if the numerical representation method of return code is that parsing is abnormal
It can use；If the numerical representation method of return code is that parsing is normal, it can be determined that the response results are available；Alternatively, working as return code
Numerical representation method be parsing it is normal when, further judge whether the IP parsed in response results normal, if it is judged that solve
If the IP of precipitation is normal, so that it may determine that the response results are available.
Wherein, when the judging result of step 104 is no, there are two types of possible situations；Situation (1), in time threshold not
Receive the response results of alternative DNS server；Situation (2) receives the response knot of alternative DNS server in time threshold
The response results of fruit and the alternative DNS server are disabled.For situation (2), due to having been received that this is standby
It with the response results of dns server, therefore is only possible to receive the response results of primary dns server after time threshold, i.e.,
What is first received after time threshold must be the response results of primary dns server.
In addition, in the timing course of time threshold (non-arrival time threshold value), even if first having received spare DNS service
The response results of device remain on the response results that wait primary dns server to be received, until the timing of time threshold terminates (to arrive
Up to time threshold)；The judging result of step 102 can just be made；I.e. if there is following situations, the response of alternative DNS server
As a result it is received in time threshold with the response results of primary dns server, and the response results of alternative DNS server connect
Prior to the receiving time of the response results of primary dns server between time receiving, then, the judging result of step 102, which remains as, is.
In present embodiment, time threshold be may be set according to actual conditions, for example, time threshold can be set as just
The maximum duration of the response results of primary dns server is received under reason condition (network is normal, primary dns server is normal etc.).
After terminal has determined the corresponding domain name mapping result of DNS request, it can be carried out according to the domain name mapping result subsequent
Business processing；It include the corresponding IP of the domain name in domain name mapping result, terminal can be according to IP that is, including domain name in DNS request
Access Resource Server.
Wherein, primary dns server is usually the dns server that operator distributes automatically after consumer wideband dialing, this DNS
The network of server cooperation operator can generally guarantee that preferably access experience, such as operator's Intranet deploy some domain
The domain name mapping to this CDN node is improved access body by the CDN node etc. of name corresponding server, the dns server of operator
It tests, so ordinary circumstance wishes the dns server (i.e. primary dns server) preferentially distributed automatically using operator.Spare DNS
The dns server of in addition public network that server is usually chosen, scheduling is so accurate unlike the dns server of operator, and having can
The domain name mapping can be serviced to the server outside this operator, access experience may be poor.The scheme of the present embodiment
It ensure that the preferential parsing result for using primary dns server, it can guarantee preferentially dispatches the dns resolution of operator, no
It only ensure that resolution speed, can also guarantee preferably access experience as far as possible.
Preferably, when judging not receive the response results of primary dns server in time threshold, i.e., in step
When 102 judging result is no, it can also include step, generate the prompt information in characterization response.Specifically, in time threshold
When not receiving the response results of primary dns server inside, there are following situations, and situation one has received standby in time threshold
With the response results of dns server, and using the response results of alternative DNS server as domain name mapping as a result, to access
(judging result of step 104 is yes, and is entered step 105)；Situation two does not receive spare DNS service in time threshold
The response results of device, then using the available response results of first received dns server as domain name mapping after time threshold
As a result, to access, (judging result of step 104 is no, and is entered step 107).In situation one, taken with spare DNS
The response results of business device access, and access path access path corresponding compared to the response results of primary dns server must
Surely can be long, therefore access time can be longer；And in situation two, the sound of dns server is just received after time threshold
It answers as a result, receive the waiting time of the response results of dns server long (can not receive compared in time threshold
The response results of dns server), therefore either situation one or situation two, compared to receiving main DNS in time threshold
The response results of server, and accessed using the response results of primary dns server, it can all consume a longer time, Yong Huke
Can because wait it is too long, with to go wrong and the turn-off request page.Wherein, the prompt information in characterization response for example can be with
It is the printed words for showing " making great efforts to load, patience is asked to wait until ".
It should be noted that in other embodiments, if not receiving the sound of primary dns server in time threshold
It answers as a result, the response results of the alternative DNS server received can be directly used when the judging result of i.e. step 102 is no；
That is, the response results regardless of alternative DNS server are received in the time threshold or are received outside the time threshold
It arrives, and the response results regardless of whether receiving primary dns server after the time threshold, can all be taken using spare DNS
The response results of business device are as the corresponding domain name mapping result of DNS request.
Second embodiment of the present invention is related to a kind of method for improving DNS availability.Second embodiment is real with first
It is roughly the same to apply mode, is in place of the main distinction: in second embodiment of the invention, if received in time threshold
The response results of main DNS server, and the response results of primary dns server are unavailable, and the response knot of alternative DNS server
Fruit is also unavailable, then or using the response results of primary dns server as the corresponding domain name mapping result of DNS request.
It is illustrated in figure 2 the flow chart of the method for the raising DNS availability of second embodiment, wherein step 201~
209,211,213~214 is roughly the same with step 101~112 in Fig. 1, and details are not described herein again；The difference is that this reality
Applying example further includes step 210；
Step 210, judge whether the response results of the alternative DNS server received can be used；If so, entering step
211；If it is not, then entering step 212.
Step 212, using the response results of primary dns server as the corresponding domain name mapping result of DNS request.
That is, judging to receive standby when the response results of the primary dns server received in time threshold are unavailable
Whether can be used with the response results of dns server；If the response results of alternative DNS server are also unavailable, or will
The response results of primary dns server are as the corresponding domain name mapping result of DNS request.
It is all not available in the response results of primary dns server and the response results of alternative DNS server in the present embodiment
In the case of, or select using the response results of primary dns server as the corresponding domain name mapping of DNS request as a result, can be to avoid
The dns resolution of terminal is arrived in excessive intervention；When cannot provide better parsing result, holding user is original as far as possible
Parsing result prevents from bringing other possible problems (such as the failure cause that returns not parity problem).
Third embodiment of the present invention is related to a kind of method for improving DNS availability.Third embodiment is real with second
It is roughly the same to apply mode, be in place of the main distinction: in third embodiment of the invention, alternative DNS server includes multiple.
It is illustrated in figure 3 the flow chart of the method for the raising DNS availability of third embodiment, wherein step 302~
303,306~309,312,314 in Fig. 2 step 202~203,206~209,212, it is 214 roughly the same, herein no longer
It repeats；The difference is that
Step 301 specifically, initiate DNS request to primary dns server and multiple alternative DNS servers respectively；
Step 304 is specifically, judge the response for whether having received at least one alternative DNS server in time threshold
As a result；
Step 305 specifically, in the response results of multiple alternative DNS servers that judgement receives whether at least one
It can use；
Step 313 is specifically, corresponding using the response results of one of them available alternative DNS server as DNS request
Domain name mapping result；
Step 310 specifically, in the response results of multiple alternative DNS servers that judgement receives whether at least one
It can use；
Step 311 is specifically, corresponding using the response results of one of them available alternative DNS server as DNS request
Domain name mapping result.
Due to there is multiple alternative DNS servers, in step 305, as long as judging that there are a spare DNS clothes
The response results of business device are available, then can be using the response results of alternative DNS server as the corresponding domain name of DNS request
That is, within step 306 parsing result selects the response results of one of them available alternative DNS server to request as DNS
Corresponding domain name mapping result.In present embodiment, multiple alternative DNS servers have been preset, DNS request can be improved
Be parsed into power.
Preferably, priority can be set to multiple standby servers, if there is the response knot of multiple alternative DNS servers
Fruit is available, can choose the response results of the higher standby server of priority.Wherein it is possible to according to each standby server for
The corresponding access path length of the IP that the DNS request of the terminal parses to set priority for each standby server, parses
The corresponding access path of IP it is shorter, then the priority of the standby server is higher.
It should be noted that present embodiment is also possible to improvement on the basis of first embodiment.
Of the invention the 4th applies mode and is related to a kind of method for improving DNS availability.4th embodiment is implemented with first
Mode is roughly the same, is in place of the main distinction: in four embodiment of the invention, having preset a delay time, if
Again without the response results for receiving the dns server in delay time after the time threshold, then indicating delay too
Long, the prompt information of characterization access error is generated.
It is illustrated in figure 4 the flow chart of the method for the raising DNS availability of the 4th embodiment, wherein step 401~
406,409~414 is roughly the same with step 101~112 in Fig. 1, and details are not described herein again；The difference is that in step
When 404 judging result is no, 407 are entered step；
Step 407: judging the response knot of the dns server whether received in the delay time after time threshold
Fruit.If it is not, then step 408；If so, step 409；
Step 408: generating the prompt information of characterization access error.
Wherein, which can set according to practical experience, for example, during multiple actual access can be counted,
The waiting time that user when access error situation occurs can select maximum value from the multiple waiting time or calculate multiple etc.
To the average value of time, as the summation of time threshold and delay time, to calculate delay time；It is only for example herein
It is bright, it is not limited thereto.
In present embodiment, user can be notified to access failure in time, and after avoiding user from waiting the long period always still
So obtain the result of access failure.
It should be noted that present embodiment can also be that is carried out on the basis of second or third real-time mode changes
Into.
The step of various methods divide above, be intended merely to describe it is clear, when realization can be merged into a step or
Certain steps are split, multiple steps are decomposed into, as long as including identical logical relation, all in the protection scope of this patent
It is interior；To adding inessential modification in algorithm or in process or introducing inessential design, but its algorithm is not changed
Core design with process is all in the protection scope of the patent.
Fifth embodiment of the invention is related to a kind of terminal, as shown in Figure 5, comprising:
At least one processor 51；And
With the memory 52 of at least one described processor 51 communication connection；Wherein,
The memory 52 is stored with the instruction that can be executed by least one described processor 51, described instruction by it is described extremely
A few processor 51 executes, so that at least one described processor 51 is able to carry out above method embodiment.
The terminal can also include: input unit 53 and output device 54.
Wherein, processor 51, memory 52, input unit 53 and output device 54 can pass through bus or other modes
It connects, in Fig. 5 for being connected by bus.Bus may include the bus and bridge of any number of interconnection, and bus is by one
Or the various circuit connections of multiple processors 51, memory 52, input unit 53, output device 54 are together.Bus can be with
By such as peripheral equipment, voltage-stablizer together with various other circuit connections of management circuit or the like, these are all these
Well known to field, therefore, it will not be further described herein.Bus interface is provided between bus and transceiver and is connect
Mouthful.Transceiver can be an element, is also possible to multiple element, such as multiple receivers and transmitter, provides for passing
The unit communicated on defeated medium with various other devices.The data handled through processor 51 are carried out on the radio medium by antenna
Transmission, further, antenna also receives data and transfers data to processor 51.
Processor 51 is responsible for management bus and common processing, can also provide various functions, including timing, periphery connects
Mouthful, voltage adjusting, power management and other control functions.
Memory 52 is used as a kind of non-transient computer readable storage medium, can be used for storing non-transient software program, non-
Transient computer executable program and module, the non-transient software journey that processor 51 is stored in memory 52 by operation
Sequence, instruction and module, thereby executing the various function application and data processing of server.
Memory 52 may include storing program area and storage data area, wherein storing program area can storage program area,
Application program required at least one function；Storage data area can store the use institute according to the processing unit of list items operation
The data etc. of creation.In addition, memory 52 may include high-speed random access memory 52, it can also include non-transient memory
52, a for example, at least magnetic disk storage 52, flush memory device or other non-transient solid-state memories 52.In some implementations
In example, optional memory 52 includes the memory 52 remotely located relative to processor 51, these remote memories 52 can lead to
Network connection is crossed to processor 51.The example of above-mentioned network includes but is not limited to internet, intranet, local area network, movement
Communication network and combinations thereof.
Input unit 53 can receive the number or character information of input, and generation has with user setting and function control
The key signals of pass input.Output device 54 may include that display screen etc. shows equipment.
In the present embodiment, when the one or more modules stored in memory 52 are by one or more of processors 51
When execution, processor 51 executes above-mentioned any means embodiment
Method provided by the embodiment of the present application can be performed in the said goods, has the corresponding functional module of execution method and has
Beneficial effect.The not technical detail of detailed description in the present embodiment, reference can be made to method provided by the embodiment of the present application.
Sixth embodiment of the invention is related to a kind of computer readable storage medium, is stored with computer program.Computer
Above method embodiment is realized when program is executed by processor.
That is, it will be understood by those skilled in the art that implement the method for the above embodiments be can be with
Relevant hardware is instructed to complete by program, which is stored in a storage medium, including some instructions are to make
It obtains an equipment (can be single-chip microcontroller, chip etc.) or processor (processor) executes side described in each embodiment of the application
The all or part of the steps of method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-
Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can be with
Store the medium of program code.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiments of the present invention,
And in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of method for improving DNS availability characterized by comprising
DNS request is initiated respectively to preset primary dns server and alternative DNS server；
Judge the response results that the primary dns server whether is received in preset time threshold；
If receiving the response results of the primary dns server in the time threshold, when the primary dns server
When response results can be used, using the response results of the primary dns server as the corresponding domain name mapping of the DNS request as a result,
When the response results of the primary dns server are unavailable, using the response results of the alternative DNS server received as
The corresponding domain name mapping result of the DNS request.
2. the method according to claim 1 for improving DNS availability, which is characterized in that the method also includes:
If not receiving the response results of the primary dns server in the time threshold,
When the response results and the alternative DNS server for having received the alternative DNS server in the time threshold
Response results when being available, using the response results of the alternative DNS server as the corresponding domain name mapping of the DNS request
As a result；
When not receiving the response results of the alternative DNS server in the time threshold, judge in the time threshold
Whether the response results of the dns server first received after value can be used；If the response knot of the dns server first received
Fruit is available, then using the response results of the dns server first received as the corresponding domain name mapping knot of the DNS request
Fruit；If the response results of the dns server first received are unavailable, the response knot of the server received by after
Fruit is as the corresponding domain name mapping result of the DNS request；Wherein, the dns server is the primary dns server or described
Alternative DNS server；
When the response results and the alternative DNS server for receiving the alternative DNS server in the time threshold
When response results are unavailable, using the response results of the primary dns server received after the time threshold as described in
The corresponding domain name mapping result of DNS request.
3. the method according to claim 1 for improving DNS availability, which is characterized in that if inscribed in the time threshold
The response results for receiving the primary dns server, when the response results of the primary dns server are unavailable, further includes:
Judge whether the response results of the alternative DNS server received can be used；
If the response results of the alternative DNS server received are available, enter the spare DNS that will be received
The response results of server are as the corresponding domain name mapping result of the DNS request；
If the response results of the alternative DNS server received are unavailable, by the response results of the primary dns server
As the corresponding domain name mapping result of the DNS request.
4. the method according to claim 3 for improving DNS availability, which is characterized in that the preset spare DNS service
The quantity of device is multiple；
It is described to initiate DNS request respectively to preset primary dns server and alternative DNS server, specifically: to the main DNS
Server and multiple alternative DNS servers initiate DNS request respectively；
Whether the response results for judging the alternative DNS server received can be used, specifically, judging to receive more
Whether at least one is available in the response results of a alternative DNS server；
If at least one in the response results of the multiple alternative DNS servers received is available, described to receive
The alternative DNS server response results as the corresponding domain name mapping of the DNS request as a result, specifically, will wherein
The response results of one available alternative DNS server are as the corresponding domain name mapping result of the DNS request；
If the response results of the multiple alternative DNS servers received are all unavailable, enter the primary dns server
Response results corresponding as the DNS request domain name mapping result the step of.
5. the method according to claim 4 for improving DNS availability, which is characterized in that multiple alternative DNS servers
It has been set priority；
It is described using the response results of one of them available alternative DNS server as the corresponding domain name of the DNS request
Parsing result, specifically, being to select the higher spare DNS of priority in the available alternative DNS server from response results
The response results of server are as the corresponding domain name mapping result of the DNS request.
6. the method according to claim 2 for improving DNS availability, which is characterized in that do not connect in the time threshold
When receiving the response results of the primary dns server, further includes:
Generate the prompt information in characterization response.
7. it is according to claim 2 improve DNS availability method, which is characterized in that when in the time threshold not
When receiving the response results of the alternative DNS server, and first received after the time threshold in the judgement
Before whether the response results of dns server are available, further includes:
Judge the response knot of the dns server whether received in the preset delay time after the time threshold
Fruit；If so, whether may be used into the response results for judging the dns server first received after the time threshold
With；If it is not, then generating the prompt information of characterization access error.
8. the method according to claim 1 for improving DNS availability, which is characterized in that described described standby by what is received
Use the response results of dns server as the corresponding domain name mapping of the DNS request as a result, specifically:
The response results that the alternative DNS server whether has been received in the time threshold are judged, if so, will connect
The response results of the alternative DNS server received are as the corresponding domain name mapping result of the DNS request；If it is not, then after
It is continuous to wait until the response results for receiving the alternative DNS server, and by the alternative DNS server received
Response results are as the corresponding domain name mapping result of the DNS request.
9. a kind of terminal characterized by comprising
At least one processor；And
The memory being connect at least one described processor communication；Wherein,
The memory is stored with the instruction that can be executed by least one described processor, and described instruction is by described at least one
It manages device to execute, so that at least one described processor is able to carry out the raising DNS as described in any in claim 1 to 8 and can be used
The method of property.
10. a kind of computer readable storage medium, is stored with computer program, which is characterized in that the computer program is located
Reason device realizes the method described in any item of the claim 1 to 8 for improving DNS availability when executing.
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| CN201811501909.XA CN109922120B (en) | 2018-12-10 | 2018-12-10 | Method and terminal for improving DNS availability |
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