/* M,:GMO:?a
**SiteFileFetch.java ^cd+W?
*/ 5^[V%4y>
package NetFox; WG<D+P
import java.io.*; y~;Kf0~
import java.net.*; 'R?;T[s%
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public class SiteFileFetch extends Thread { ^O4.$4t|
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SiteInfoBean siteInfoBean = null; //文件信息Bean %J7 ;b<}To
long[] nStartPos; //开始位置 H7*/
long[] nEndPos; //结束位置 a+IU<O-J?
FileSplitterFetch[] fileSplitterFetch; //子线程对象 |no '^
long nFileLength; //文件长度 *cJ GrLC
boolean bFirst = true; //是否第一次取文件 9aYCU/3
boolean bStop = false; //停止标志 H 2\KI(
File tmpFile; //文件下载的临时信息 d+Pfi)+(I
DataOutputStream output; //输出到文件的输出流 BY6QJkI9x
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) &`GQS|
public SiteFileFetch(SiteInfoBean bean) throws IOException _=8x?fC:rl
{ sZ7{_}B
siteInfoBean = bean; EnZrnoGM
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); %YA=W=Yd
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 4w\cS&X~C
if(tmpFile.exists ()) (+(YO\ng6
{ ,J~kwJ$L
bFirst = false; Tw);`&Ulo
read_nPos(); PO]z'LD
} cYq<.A(hVj
else yiiYq(\{
{ g#T8WX{(V
nStartPos = new long[bean.getNSplitter()]; #:e52=
nEndPos = new long[bean.getNSplitter()]; RT4ns +J1
} C]p3,G,oN
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} 2/x+7F}w5
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public void run() 9#xcp/O
{ mn)kd
//获得文件长度 &U*=D8!0
//分割文件 A#\NVN8sk
//实例FileSplitterFetch V)oUSHillH
//启动FileSplitterFetch线程 /T!S)FD\/v
//等待子线程返回 *O+G}_}
try{ |ffM6W1:
if(bFirst) oyiEOC
{ udMDE=1~L
nFileLength = getFileSize(); ;|5m;x/a
if(nFileLength == -1) FcB]wz
{ #%rXDGDS
System.err.println("File Length is not known!"); !
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} Uo#%f+t
else if(nFileLength == -2)
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{ t-)C0<
System.err.println("File is not access!"); }E+#*R3auB
} K1AI:$H
else G>qzAgA
{ qCi6kEr
for(int i=0;i<nStartPos.length;i++) %(79;#2`
{ 2j+v\pjYC
nStartPos = (long)(i*(nFileLength/nStartPos.length)); za`
} @2yi%_]h
for(int i=0;i<nEndPos.length-1;i++) sk.<|-(o
{ iP6$;Y{ZA
nEndPos = nStartPos[i+1]; ?kqo~twJ
} ,W;\6"Iwx'
nEndPos[nEndPos.length-1] = nFileLength; {L$ ]NQdz
} W9D]s~bO;
} ?6P
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//启动子线程 4W
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fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; CqDKQQ
for(int i=0;i<nStartPos.length;i++) q90eB6G0g
{ Mhc!v, D$
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (iXo\y`z
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), N:[22`NP
nStartPos,nEndPos,i); eZ#nZB
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m_LW<'
fileSplitterFetch.start(); i Tg?JoE2
} B{^o}:e
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), HS =qK
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); uO%G,b
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", \$n?J(N
nEndPos = " + nFileLength); po~V{>fUm
// fileSplitterFetch[nPos.length-1].start(); ;cgc\xm>
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//等待子线程结束 ~3<Li}W
//int count = 0; {p&LwTnf
//是否结束while循环 .{%~4$yu7
boolean breakWhile = false; gDU~hv
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while(!bStop) =(Y 1y$
{ n8n(<
write_nPos(); -`x$a&}
Utility.sleep(500); [HGGXgN
breakWhile = true; .]}kOw:(#
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for(int i=0;i<nStartPos.length;i++) eY^;L_7}p
{ MQ>.^]B]o
if(!fileSplitterFetch.bDownOver) 6m"_=.k%
{ %T4htZa
breakWhile = false; *u^N_y
break; b0|q@!z>
} {KYbsD
} m`l3@Z
if(breakWhile) ,y@`wq>O
break; >Ng7q?h
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//count++; x;ym_UZ6e
//if(count>4) \' (_r
// siteStop(); iTJSW
} t>p!qKrE'J
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System.err.println("文件下载结束!"); teh$W<C
} jsL\{I^>
catch(Exception e){e.printStackTrace ();} 0O+[z9
} YcW[BMy5h
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//获得文件长度 mVFz[xI
public long getFileSize() $xqI3UaX
{ <Hw)},_*
int nFileLength = -1; ckFnQhW
try{ R
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URL url = new URL(siteInfoBean.getSSiteURL()); ~RGZY/4
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); tr3Rn :0]
httpConnection.setRequestProperty("User-Agent","NetFox"); (GB2("p`
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int responseCode=httpConnection.getResponseCode(); a-w=LpVM
if(responseCode>=400) Ba==Ri8$
{ Gh;Ju[6
processErrorCode(responseCode); `|@# ~
return -2; //-2 represent access is error A;VjMfoB
} <8#Q5
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String sHeader; VbR/k,Co
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for(int i=1;;i++) ? ->:,I=<~
{ Vp{e1xpY
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Khd"
//Utility.log(in.readLine()); "J:~Aa%_
sHeader=httpConnection.getHeaderFieldKey(i); xE%1C6~C<
if(sHeader!=null) q2v:lSFY
{ 0\3mS{s
if(sHeader.equals("Content-Length")) nk.m Gny
{ j/"{tMqQp
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); U(#)[S,
break; wcz|Zy
} pm$ZKM
} |tL57Wu93
else tj:3R$a
break; H}G=%j0
} =*EIe z*.x
} @pq#?
catch(IOException e){e.printStackTrace ();} *xm(K+j
catch(Exception e){e.printStackTrace ();} HsrIw
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Utility.log(nFileLength); TS0x8,'$q
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return nFileLength; sjh>i>t
} q;co53.+P)
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//保存下载信息(文件指针位置) 4u}"ng
private void write_nPos() |GPR3%9
{ o!.\+[
try{ %jaB>4.A:
output = new DataOutputStream(new FileOutputStream(tmpFile)); B&^WRM;7t
output.writeInt(nStartPos.length); ke.{wh\0
for(int i=0;i<nStartPos.length;i++) VrL==aTYXs
{ V=yRE
// output.writeLong(nPos); gp07I{0~m
output.writeLong(fileSplitterFetch.nStartPos); 2kg<O%KA`c
output.writeLong(fileSplitterFetch.nEndPos); :|hFpLt
} +Kc1a;
output.close(); x1:#rb'
} ^`b&fbv
catch(IOException e){e.printStackTrace ();} Tj
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catch(Exception e){e.printStackTrace ();} {v&c5B~,\
} ~F5JN^5Y
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//读取保存的下载信息(文件指针位置) l5sBDiir%
private void read_nPos() z{h#l!Edh
{ `J*~B
try{ :eaqUW!Y
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 3w&fN3
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int nCount = input.readInt(); En&bwLu:s
nStartPos = new long[nCount]; f:$LVpXS-
nEndPos = new long[nCount]; Hya ";'
for(int i=0;i<nStartPos.length;i++) 5rG&Z5
{ _@es9
nStartPos = input.readLong(); K:}~8 P>^
nEndPos = input.readLong(); ^/;W;C{4
} diXb8L7B;
input.close(); Wtl0qug
} rBBA`Ut@F
catch(IOException e){e.printStackTrace ();} y!6+jrI
catch(Exception e){e.printStackTrace ();} HN'r
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} =)Z!qjf1U
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private void processErrorCode(int nErrorCode) eIVCg-l}
{ X8!=Xjl)
System.err.println("Error Code : " + nErrorCode); Z2z"K<Z W
} 7%rSo^t,L
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//停止文件下载 -fF1vJ7L
public void siteStop() r()%s3$q
{ ]W,K}~!
bStop = true; a`}b'X:
for(int i=0;i<nStartPos.length;i++) C N9lK29F)
fileSplitterFetch.splitterStop(); m9*Lo[EXO
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} s3m]rC
} ?h`Ned0P
//负责部分文件的抓取 ibDMhW$n
**FileSplitterFetch.java |&