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**SiteFileFetch.java (=7Cs
*/ 9$2/MT't
package NetFox; 0a80 LAK
import java.io.*; th;{V%:LW
import java.net.*; *98$dQR$
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public class SiteFileFetch extends Thread { !pD*p)`s
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SiteInfoBean siteInfoBean = null; //文件信息Bean ~\ J}Kqg
long[] nStartPos; //开始位置 /!c${W!sY
long[] nEndPos; //结束位置 j4qJ.i
FileSplitterFetch[] fileSplitterFetch; //子线程对象 %Dwk
long nFileLength; //文件长度 w.[ "p9tc
boolean bFirst = true; //是否第一次取文件 YW7b)uYf
boolean bStop = false; //停止标志 >0"+4<72
File tmpFile; //文件下载的临时信息 @Y1s$,=xB
DataOutputStream output; //输出到文件的输出流 EK4d_L]I
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) V4_=<W
public SiteFileFetch(SiteInfoBean bean) throws IOException P9T}S
{ 17`1SGZ
siteInfoBean = bean; e)(wss+d7P
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); nDHTV!]<
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); oH_;4QU4y
if(tmpFile.exists ()) =3L;Z[^9
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bFirst = false; @)fd}tV
read_nPos(); ouuuc9x]
} J:Qa5MTWp
else Z'\h
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nStartPos = new long[bean.getNSplitter()]; DAXX;4
nEndPos = new long[bean.getNSplitter()]; e
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public void run() h2XfC.f
{ 7eAX*Kgt<_
//获得文件长度 ev*k*0
//分割文件 Ru>MFG
//实例FileSplitterFetch oM>Z;QVRC:
//启动FileSplitterFetch线程 G|!on<l&
//等待子线程返回 ?.Ca|H<
try{ <$IM8Y5p+w
if(bFirst) .=s&EEF
{ EwvoQ$#jv
nFileLength = getFileSize(); g\&g N
if(nFileLength == -1) K1M%!JKh)x
{ TA4!$7b$
System.err.println("File Length is not known!"); E>D_V@,/
} E&[{4Ml
else if(nFileLength == -2) 5:KQg
{ Y2~nBb
System.err.println("File is not access!"); gcl5jB5)>
} @X#F3;
else }f6HYU
{ .nx2";oi
for(int i=0;i<nStartPos.length;i++) M 0U0;QJ
{ VgZsB$Ori
nStartPos = (long)(i*(nFileLength/nStartPos.length)); J^Wa8Q;9lX
} [J?aD`{#O
for(int i=0;i<nEndPos.length-1;i++) hYG6 pTCb
{ kY-N>E:
nEndPos = nStartPos[i+1]; Z/Dx,zIR
} ;'#8tGv=
nEndPos[nEndPos.length-1] = nFileLength; woGAf)vV#
} 0"28'
} 9
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//启动子线程 ~d|A!S`
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; m8d!<
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for(int i=0;i<nStartPos.length;i++) Bf ~vA4
{ i#vYyVr[
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), gc-@"wI?
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), G}b]w~ML~
nStartPos,nEndPos,i); #Y
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Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ix)M`F%P3
fileSplitterFetch.start(); $QN"wL||
} wsI`fO^A8
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), K;?m';z0
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); w"-Lc4t+
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", /<|%yE&KhJ
nEndPos = " + nFileLength); U`, 6 * MS
// fileSplitterFetch[nPos.length-1].start(); "Q@ronP(~
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//等待子线程结束 Y)* #)f
//int count = 0; Z`ID+
//是否结束while循环 5B3G
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boolean breakWhile = false; \fz<.l]
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while(!bStop) Q ayPo]O
{ )rn*iJ.e8
write_nPos(); OEA&~4&{7
Utility.sleep(500); 'vbsv T
breakWhile = true; }ppN k:B
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for(int i=0;i<nStartPos.length;i++) n|Q@UPb/=
{ *x@Onj
if(!fileSplitterFetch.bDownOver) .WA-&b_
{ CQF:Rnb
breakWhile = false; 5Ha9lM2gh
break; 5q3JI
} gmw|H?]
} Lo{
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if(breakWhile) G|!Tj X7s
break; |"ls\ 7
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//count++; &^ 1$^=
//if(count>4) +"
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// siteStop(); snE8 K}4
} [=6]+V83M
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System.err.println("文件下载结束!"); f-vCm 5f
} Dp,L/1GQ8
catch(Exception e){e.printStackTrace ();} !/'t5~x[
} <J<{l
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//获得文件长度 ,w<S|#W~+
public long getFileSize() md)c0Bg8~
{ LG{,c.Qj*
int nFileLength = -1; %9KldcQ}~
try{ N7b8m?!
URL url = new URL(siteInfoBean.getSSiteURL()); Xv ]W(f1
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3%#3iZ=_
httpConnection.setRequestProperty("User-Agent","NetFox"); nv*FT
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int responseCode=httpConnection.getResponseCode(); )WNzWUfn=z
if(responseCode>=400) }7|1
{ Yb|c\[ %
processErrorCode(responseCode); 2b}t,&bv?
return -2; //-2 represent access is error Hq'`8f8N
} hZ?Rof
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String sHeader; (y=C_wvqZ
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for(int i=1;;i++) >?2M
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{ TaZmRL
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); !"?#6-,Xn
//Utility.log(in.readLine()); '.IW.{;$
sHeader=httpConnection.getHeaderFieldKey(i); #++lg{
if(sHeader!=null) &FMc?wq
{ QO<jI#
if(sHeader.equals("Content-Length")) `06;
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nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); K
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break; ~ (|5/
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} ! E<[JM
} (5$!MUS~9
else Ec3}_`
break; |7'df &CA
} *v;2PP[^
} -u6bAQ
catch(IOException e){e.printStackTrace ();} \:%(q/v"X
catch(Exception e){e.printStackTrace ();} T,,WoPU8t
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Utility.log(nFileLength); |HiE@
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return nFileLength; [owWiN4`s
} Ci@o|Y }tP
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//保存下载信息(文件指针位置) =_.l8IYX$%
private void write_nPos() dN$0OS`s[
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output = new DataOutputStream(new FileOutputStream(tmpFile)); X&tF;<m^
output.writeInt(nStartPos.length); Ep9nsX*
for(int i=0;i<nStartPos.length;i++) ;km`P|<U
{ zJq~!#pZ
// output.writeLong(nPos); j8v8uZ;x
output.writeLong(fileSplitterFetch.nStartPos); >8~.wXyoC
output.writeLong(fileSplitterFetch.nEndPos); !a{^=#qq&I
} LC,F
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output.close(); b o6d)Q
} k :(SCHf
catch(IOException e){e.printStackTrace ();} ISYXH9V
catch(Exception e){e.printStackTrace ();}
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} ]FJjgu<