/* pY~/<lzW
**SiteFileFetch.java }Quk n
*/ U ;%cp
package NetFox;
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import java.io.*; {s7
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import java.net.*; pie8 3Wy>
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public class SiteFileFetch extends Thread { n^lr7(!6
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SiteInfoBean siteInfoBean = null; //文件信息Bean z7X,5[P
long[] nStartPos; //开始位置 Ndz'^c
long[] nEndPos; //结束位置 {*PbD;/f
FileSplitterFetch[] fileSplitterFetch; //子线程对象 `R!%k]$
long nFileLength; //文件长度 UdOO+Z_K%
boolean bFirst = true; //是否第一次取文件 GBY-WN4sc[
boolean bStop = false; //停止标志 #3knKBH
File tmpFile; //文件下载的临时信息 +HT?>k
DataOutputStream output; //输出到文件的输出流 Ur9L8EdC
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) =]fOQN`
public SiteFileFetch(SiteInfoBean bean) throws IOException .du2;`[$r
{ 0FcG;i+
siteInfoBean = bean; E[ttamU
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ]3Y J a
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); dQs>=(|t
if(tmpFile.exists ()) r_hs_n!6
{ Nu;?})tF
bFirst = false; Ya
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read_nPos(); dK Qu
} .% 79(r^
else %"Ia]0
{ /.WIED}>
nStartPos = new long[bean.getNSplitter()]; FnPn#Cv>*
nEndPos = new long[bean.getNSplitter()]; z2lT4SAv+
} }X/>WiGh:
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} %i) 0sET
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public void run() y(wb?86#W5
{ >a;LBQ0
//获得文件长度 ?PYZW5
//分割文件 7~~suQ{F4
//实例FileSplitterFetch |'``pq/}_
//启动FileSplitterFetch线程 ;$67GK
//等待子线程返回 yAFt|<
try{ *nK4XgD
if(bFirst) 29^(weT"]
{ mT/^F{c
nFileLength = getFileSize(); 'YJ~~o
if(nFileLength == -1) cw,|,uXq
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{ PXG@]$~3
System.err.println("File Length is not known!"); A34O(fE
} D_?dy4\
else if(nFileLength == -2) ;jJ4H+8
{ <iBn-EG l>
System.err.println("File is not access!"); @?jbah#
} g~2=he\C
else ^Kl*}
{ DL#y_;#3_
for(int i=0;i<nStartPos.length;i++) @ULd~
{ $o.;}
nStartPos = (long)(i*(nFileLength/nStartPos.length)); k8!:`jG
} +,g!xv4Q
for(int i=0;i<nEndPos.length-1;i++) DS9-i2
{ (+6N)9rj`/
nEndPos = nStartPos[i+1]; oWx^_wQ-=
} A)gSOC{3F)
nEndPos[nEndPos.length-1] = nFileLength; p({Lp}'
} ]a`"O
} {6O}E9
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//启动子线程 V(XZ7<& {
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ]0O3kiVQ
for(int i=0;i<nStartPos.length;i++) &grvlK
{ 0_AIKJrL
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {>PEl;,-
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), LqO=wK~
nStartPos,nEndPos,i);
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Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); aI=Q_}8-
fileSplitterFetch.start(); DAg*
} ,)N/2M\B-
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &EYoviFp
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); `A5n6*A7
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", acar-11_o/
nEndPos = " + nFileLength); \3]O?'
// fileSplitterFetch[nPos.length-1].start(); 1M6^Brx
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//等待子线程结束 ..k8HFz>"
//int count = 0; 6tjV^sjs
//是否结束while循环 u.G aMl4 (
boolean breakWhile = false; {;th~[
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while(!bStop) ,jtaTG.>
{ X&| R\v=}
write_nPos(); m`n~-_
Utility.sleep(500); Q&+)Kp]A
breakWhile = true; X h}D_c
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for(int i=0;i<nStartPos.length;i++) >4-9 @i0FV
{ hg:$H9\%
if(!fileSplitterFetch.bDownOver) |:Maa6(W
{ s[dIWYs#
breakWhile = false; pq\N2d
break; #D%6b
} 4e;$+!dlV
} *
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if(breakWhile) |W$|og'wC
break; !f&hVLs0
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//count++; >M!LC
//if(count>4) >dJ~
// siteStop(); $-~"G,;F
} nHH
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System.err.println("文件下载结束!"); LH=^3Gw
} NI.ROk1{+4
catch(Exception e){e.printStackTrace ();} =$L+J O
} =J]EVD
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//获得文件长度 _dz ZS(7M6
public long getFileSize() VCiq'LOR,<
{ 5*-RIs! 2
int nFileLength = -1; wfEL
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try{ )8eb(!}7
URL url = new URL(siteInfoBean.getSSiteURL()); 5GgH6
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); rFkZ'rp74b
httpConnection.setRequestProperty("User-Agent","NetFox"); `-{? !
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int responseCode=httpConnection.getResponseCode(); QxxPImubB
if(responseCode>=400) nnN$?'%~6
{ IbL'Z
processErrorCode(responseCode); G!=(^G@J;
return -2; //-2 represent access is error ceD6q~)
} %8%|6^,
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String sHeader; iWC}\&i
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for(int i=1;;i++) C4`&_yoP4-
{ TQNdBq5I6
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 5}Ge
//Utility.log(in.readLine()); 8!3 q:8y8
sHeader=httpConnection.getHeaderFieldKey(i); K@xMPB8in
if(sHeader!=null) sJ^Ff
{ aXQAm$/
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if(sHeader.equals("Content-Length")) -3~S{)
{ \}u/0UF97
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 77sG;8HE
break; pY3/AO=
} #>\SK
} km5gO|V>m
else );}M"W8
break; &08dW9H
} AB,(%JT/2{
} E<u(Yw6=
catch(IOException e){e.printStackTrace ();} E'D16Rhp
catch(Exception e){e.printStackTrace ();} D_$N2>I-
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Utility.log(nFileLength); '%ZKvZ-
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return nFileLength; _z%~m2SP
} q UmSB"#Z
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//保存下载信息(文件指针位置) ni2 [K`
private void write_nPos() $M0l
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{ K;rgLj0m
try{ v?6*n>R
output = new DataOutputStream(new FileOutputStream(tmpFile)); +cYDz#3%
output.writeInt(nStartPos.length); N#RC;
for(int i=0;i<nStartPos.length;i++) W.cc!8
{ nsXG@C S:
// output.writeLong(nPos); 'm|T"Ym~
output.writeLong(fileSplitterFetch.nStartPos); m;rr7{7X
output.writeLong(fileSplitterFetch.nEndPos); b&4JHyleF
} 8EdaqF
output.close(); J?dz>3Rhx9
} 4|5;nxkGm8
catch(IOException e){e.printStackTrace ();} H<q|je}e
catch(Exception e){e.printStackTrace ();} 09P2<oFLn
} SDS P4W5
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//读取保存的下载信息(文件指针位置) R<Mp$K^b
private void read_nPos() sUmpf 4/
{ 0[<'ygu
try{ o$% KbfXO]
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); B:UPSX)A
int nCount = input.readInt(); D$H&^,?N
nStartPos = new long[nCount]; Eul3 {+]
nEndPos = new long[nCount]; HOH5_E>d
for(int i=0;i<nStartPos.length;i++) "SQyy
{ HN/YuP03[
nStartPos = input.readLong(); :(/1,]bF
nEndPos = input.readLong(); {E)tzBI;^
} L8'4d'N+>
input.close(); a_[+id
} sm G?y~
catch(IOException e){e.printStackTrace ();} L[Y$ `e{zd
catch(Exception e){e.printStackTrace ();} x5smJ__/
} gN(kRhp
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private void processErrorCode(int nErrorCode) Gx4uf
{ &dj/Dq@
System.err.println("Error Code : " + nErrorCode); {|<r7K1<
} IQ~Anp^R
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//停止文件下载 !nsr( 7X2
public void siteStop() n[y^S3}%;
{ ngd4PN>{4
bStop = true; pBBKfv
for(int i=0;i<nStartPos.length;i++) vfhoN]v
fileSplitterFetch.splitterStop(); *M:p[.=1
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} eL)m(
} 'aD"v>
//负责部分文件的抓取 V8o,
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**FileSplitterFetch.java NL-PQ%lUA
*/ J?Q@f
package NetFox; ;BWWafZ
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import java.io.*; efHCPj
import java.net.*; Tb:'M:dM"
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public class FileSplitterFetch extends Thread { UaQW<6+
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String sURL; //File URL h.- o$+Sa
long nStartPos; //File Snippet Start Position r"x}=# b!
long nEndPos; //File Snippet End Position i \lr
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int nThreadID; //Thread's ID Z.aeE*Hs$
boolean bDownOver = false; //Downing is over ?G&J_L=@Y
boolean bStop = false; //Stop identical ^$oEM0h
FileAccessI fileAccessI = null; //File Access interface #q&Nd2y
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException vZ=dlu_t
{ gMZrtK`<
this.sURL = sURL; OH
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this.nStartPos = nStart; pm= s
this.nEndPos = nEnd; _R
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nThreadID = id; 'Q*lp!2>
fileAccessI = new FileAccessI(sName,nStartPos);//定位 "zFTPL"
} O=!Eqa ExW
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public void run() 1x+w|h
{ !|"LAr9u
while(nStartPos < nEndPos && !bStop) ah!RQ2hDrV
{ =`V9{$i
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try{ cI<T/~P
URL url = new URL(sURL); nqcD#HUv
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); = o1&.v2j
httpConnection.setRequestProperty("User-Agent","NetFox"); q\fai^_
String sProperty = "bytes="+nStartPos+"-"; ?V)M!
httpConnection.setRequestProperty("RANGE",sProperty); dW|S\S'&
Utility.log(sProperty); _ukBp*u
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InputStream input = httpConnection.getInputStream(); Bjb8#n04
//logResponseHead(httpConnection); r$!
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byte[] b = new byte[1024]; F4&`0y:
int nRead; nqib`U@"
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) {'f=*vMI
{ D}pNsQ
nStartPos += fileAccessI.write(b,0,nRead); lXrAsm$
//if(nThreadID == 1) 'c/Z
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// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); p=f8A71
} m' L8z
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Utility.log("Thread " + nThreadID + " is over!"); SBG.t:
bDownOver = true; OjY#xO+'
//nPos = fileAccessI.write (b,0,nRead); /q6
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} 2E=vMAS
catch(Exception e){e.printStackTrace ();} ,Je9]XT
} l Gy`{E|
} ?\T):o;/
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