CN101729562A - Reliable data transmission method under unreliable network connection - Google Patents

Abstract

The invention provides a reliable data transmission method under unreliable network connection to solve the problems that how to completely and reliably transmit data between networks under the condition of intermittent or occasional connection of the networks. The method comprises the following steps of network access proxy, network state judgment, automatic data transmission and automatic data cache. The method is applied to the government industry and large-scale group enterprises on a large scale, a user offline makes documents or submits data under the condition that a user is transitory online by dialing or a gate keeper automatically intermittently communicate with inner and outer nets, and the data is automatically transmitted by the method when the network is communicated. The method has the characteristics of simple operation and safe, effective data uploading, and excellent promotion and use value.

Description

Reliable data transmission method under a kind of unreliable network connects

Technical field

The present invention relates to a kind of Computer Applied Technology, provided the reliable data transmission method under a kind of unreliable network connection specifically, solved under the situation that network connects off and on or connects once in a while, how complete between network, transmit the problem of data reliably.

Background technology

Adopt the information system of multi-layer framework often to require network to continue to connect and have enough bandwidth, therefore also more and more higher to the network degree of dependence, however in reality, network connects can't guarantee availability anywhere or anytime again.

The user of some industry or enterprise may temporarily lose network because of going on business and connect, perhaps have the network connection but exist and postpone or bandwidth problem, some part that perhaps may need to dismantle network is safeguarded, perhaps has a mind to by the automatic UNICOM's intranet and extranet at interval of gateway.But business can not be owing to the unreliable of network suspends, for partial service, single such as system, can pass through automatically at this machine buffer memory bills data, by a backstage service autopolling network state, when network UNICOM, automatically data are sent in the information system and go again.So just can increase work efficiency effectively.

Summary of the invention

The invention provides the reliable data transmission method under a kind of unreliable network connection.

1. information system direct access network services, but conduct interviews by the access to netwoks agency; The access to netwoks agency comprises that data are kept at client automatically to the access request of information system; The access to netwoks agency detects network state automatically, uploads data download when network UNICOM automatically.

2. access to netwoks agency's definition code is:

class?WebServiceProxy

{

void?AddReuest(Request?request)；

bool?DoWhenOnLine()；

bool?IsConnected{get；}

}

Wherein, the definition code of request class Request is:

public?class?Request

{

public?object[]CallParameters{get；set；}

public?string?Endpoint{get；set；}

public?string?MethodName{get；set；}

public?Guid?RequestId{get；set；}

Type?ProxyType{get；set；}

}

3. during the information system access network services, at first according to the definition of the network service of visit, make up the example of a Request class, AddReuest (Requestrequest) method of calling the WebServiceProxy class then increases a network access request.

4. when information system called AddReuest (Request request) method, this method inside was saved in request in the local database by following code and goes.

public?void?AddReuest(Request?request)

{

DBClient?client＝DBFactory.OpenClient()；

client.Set(request)；

client.Close()；

}

5. the access to netwoks agency network service request of reading buffer memory from the database of this locality makes up Request class example, makes up URL according to the EndPoint attribute of Request class, sends the HTTP request then, judges whether UNICOM of network according to request return state sign indicating number.When network UNICOM, the access to netwoks agency finishes the visit of network service according to ProxyType, MethodName, the CallParameters attribute of Request class example.Code is:

public?bool?DoWhenOnLine()

{

if(！IsConnected)return?false；

IList<Request>rqs＝null；

DBClien?db＝DBFactory.OpenClient()；

rqs＝db.Query<Request>(typeof(Request))；

foreach(Request?rq?in?rqs)

{

Object?proxy＝Activator.CreateInstance(rq.ProxyType)；

proxy.Url＝EndPoint；

MethodInfo?method＝rq.ProxyType.GetMethod(rq.MethodName)；

object?result＝method.Invoke(proxy，rq.CallParameters)；

db.Delete(rq)；

}

db.Close()；

return?true；

}

Excellent effect of the present invention is: can not only allow the user use its application program to carry out working when off-line fruitfully, and can in time upload off-line data when network UNICOM, improve customer productivity and operating efficiency effectively.This invention makes the off-line of information system use and obtains good support, has very high popularization and economic worth.

Embodiment

The invention provides the reliable data transmission method under a kind of unreliable network connection, comprise the access to netwoks agency; Network state is judged; Automatic data transmission; The automatic buffer memory of data.Access to netwoks agency is cached to this machine automatically with data, when network-in-dialing, automatically data upload is downloaded to this machine to server end or from server end then, so just can be under the state of unstable networks using system.

For make advantage of the present invention, purpose be more readily understood, understandable, do a detailed description with regard to concrete execution mode below.

1. every place that needs access network services in information system, the AddReuest of WebServiceProxy class (Request request) method.

2. when os starting, start the access to netwoks Agent automatically.For example: the access to netwoks Agent is put into " c: Documents and Settings All Users the Start menu program start " under the catalogue.

This system has light small and exquisite, the characteristics that are easy to dispose, can solve because of losing network to connect the problem that the information system that causes can't use.

The present invention at present widely applies in government's industry and large-scale synthesis type conglomerate, can not only allow the user when off-line, use its application program to carry out working fruitfully, and can when network UNICOM, in time upload off-line data, improve customer productivity and operating efficiency effectively.This invention makes the off-line of information system use and obtains good support, has very high popularization and economic worth.

Claims (3)

1. the reliable data transmission method under a unreliable network connects is characterized in that, comprises the access to netwoks agency; Network state is judged; Automatic data transmission; The automatic buffer memory of data, access to netwoks agency is cached to this machine automatically with data, when network-in-dialing, automatically data upload is downloaded to this machine to server end or from server end then, is implemented in using system under the state of unstable networks, may further comprise the steps:

1) the not direct access network services of information system, but conduct interviews by the access to netwoks agency; Its definition code is acted on behalf of in access to netwoks:

class?WebServiceProxy

{

void?AddReuest(Request?request)；

bool?DoWhenOnLine()；

bool?IsConnected{get；}

}

Wherein, the definition code of request class Request is:

public?class?Request

{

public?object[]CallParameters{get；set；}

public?string?Endpoint{get；set；}

public?string?MethodName{get；set；}

public?Guid?RequestId{get；set；}

Type?ProxyType{get；set；}

}；

2) the access to netwoks agency comprises that data are kept at client automatically to the access request of information system;

3) the access to netwoks agency detects network state automatically, when network UNICOM, upload data download automatically "; concrete steps are as follows: access to netwoks agency reads buffer memory from the database of this locality network service request; make up Request class example; the EndPoint attribute according to the Request class makes up URL; send the HTTP request then; judge whether UNICOM of network according to request return state sign indicating number, when network UNICOM, the access to netwoks agency is according to the ProxyType of Request class example, MethodName, the CallParameters attribute, finish the visit of network service, code is:

public?bool?DoWhenOnLine()

{

if(！IsConnected)return?false；

IList<Request>rqs＝null；

DBClien?db＝DBFactory.OpenClient()；

rqs＝db.Query<Request>(typeof(Request))；

foreach(Request?rq?in?rqs)

{

Object?proxy＝

Activator.CreateInstance(rq.ProxyType)；

proxy.Url＝EndPoint；

MethodInfo?method＝

rq.ProxyType.GetMethod(rq.MethodName)；

object?result＝method.Invoke(proxy，

rq.Cal?lParameters)；

db.Delete(rq)；

}

db.Close()；

return?true；

}

2. according to the described method of claim 1, it is characterized in that, during the information system access network services, the at first definition of serving according to the network of visit, make up the example of a Request class, AddReuest (Request request) method of calling the WebServiceProxy class then increases a network access request.

3. according to the described method of claim 2, it is characterized in that when information system called AddReuest (Request request) method, this method inside was saved in request in the local database by following code and goes;

public?void?AddReuest(Request?request)

{

DBClient?client＝DBFactory.OpenClient()；

client.Set(request)；

client.Close()；

}。