文件传输 3断点续传与多线程传输（3 file transfer http and multi-threaded transfer）

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1、文件传输3断点续传与多线程传输（3filetransferHTTPandmulti-threadedtransfer）FollowingtheDIYTrojanprogrammingontwo,nowwebegantodiscusstheimplementationoftheHTTPandmulti-threadedfiletransfer.Infact,thesetwofunctionsistodownloadthesoftwareEssentialfunction,nowweaddittoourownTrojanhorse

2、toexperiencethefeelings.Referringtomulti-threadeddownload,firstofalltothenetworkantsauthorThetributetoHongYirong'spredecessoristhatmultithreadeddownloadshavecaughttheattentionoftheInternetandbecomepopular.Inthisarticle,we'llsimplyimplementitSupportforHTTPandmulti-th

3、readedtransferprocedures.Inordertoexplainmoreclearly,wewillHTTPandmulti-threadedtransferrespectivelywithtwoprocedurestoachieveImplementationofmultithreadedtransmissionRealizationprincipleThesourcefileisdividedintoNblocksbylength,andthenNthreadsareopened,eachthreadtr

4、ansfersonepiece,andfinallyallthreadthreadsaremergedAfile500Mwecantransferby5threadsbylength.Thefirstthreadmergesthe5threadfilesfrom0-100M,secondthreadsfrom100M-200MImplementationprocessThe1.clientrequeststhefileinformation(name,length)totheserver2.clientwiththefilel

5、engthtoopenupNthreadstoconnecttheserver3.,theservertoopennewthreads,communicatewiththeclientandtransferfilesThe4.clientsaveseachthreadofdatatoafile5.mergeallthreadfilesCodeimplementationGenerallyspeaking,accordingtotheabovesteps,detailedimplementationandsomemainpoin

6、ts,wefollowtheaboveprocessincodingStructuredefinitionInthecommunicationprocess,weneedtotransferinformationincludingfilename,filelength,fileoffset,operationinstructionsandotherinformation.Inordertofacilitatetheoperation,wedefinethefollowingstructuretypedefstruct{Char

7、Name[100];//filenameIntFileLen;//filelengthIntCMD;//operationinstructionIntseek;//threadstartpositionSOCKETsockid;}FILEINFO;Copycode1.torequestfileinformationTheclientcodeisasfollows:FILEINFOfi;Memset((char*)&fi,0,sizeof(FI));Fi.CMD=1;//getfileinformationIf(send(cli

8、ent,(char*),&fi,sizeof(FI),0)==SOCKET_ERROR){Cout<<"SendGetFileInfoError"";}TheservercodeisasfollowsWhile(true){SOCKETclient;If(client=a