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**SiteFileFetch.java Jq0aDf
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package NetFox; +]I7]
import java.io.*; S<Z]gY @c
import java.net.*; y;zp*(}f$h
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public class SiteFileFetch extends Thread { N!R>L{H>
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SiteInfoBean siteInfoBean = null; //文件信息Bean lYz{#UX}
long[] nStartPos; //开始位置 m2wGg/F5
long[] nEndPos; //结束位置 {%g]Ym=
FileSplitterFetch[] fileSplitterFetch; //子线程对象 l/?Jp+]
long nFileLength; //文件长度 zN2CI6
boolean bFirst = true; //是否第一次取文件 mx`QBJ
boolean bStop = false; //停止标志 gaFOm9y.e
File tmpFile; //文件下载的临时信息 ?N*m2rv
DataOutputStream output; //输出到文件的输出流 M7U:UV)
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Q<4Sd:P`"
public SiteFileFetch(SiteInfoBean bean) throws IOException ^0oOiZs
{ %K0
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siteInfoBean = bean; F@ Sw
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); $oF0[ }S
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info");
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if(tmpFile.exists ()) \NE~k)`4j%
{ klkshlk d
bFirst = false; h-)tWJ c
read_nPos(); *F:f\9
} SUv(MA&
else XcN"orAo
{ tzH~[n,
nStartPos = new long[bean.getNSplitter()]; pC=kv ve
nEndPos = new long[bean.getNSplitter()]; .gZ1}2GF=
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}
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public void run() =i'APeNaQ
{ o$PY0~#
//获得文件长度 Sfl. &A(
//分割文件 >;wh0dBe
//实例FileSplitterFetch o:oQF[TcFO
//启动FileSplitterFetch线程 SSCyq#dl$
//等待子线程返回 lVb{bO9-O
try{ [S Jx\Os
if(bFirst) X*'i1)_h
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nFileLength = getFileSize(); -jXO9Q
if(nFileLength == -1) Epo/}y
{ mKTE%lsH
System.err.println("File Length is not known!"); 3MqyHOOv
} mbSG
else if(nFileLength == -2) yRd [$p
{ \0)v5u
System.err.println("File is not access!");
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} utSW>
else =}F}XSvXH
{ d8N{sT
for(int i=0;i<nStartPos.length;i++) ,,}&
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); eMHBY6<~=
} $U*b;'o
for(int i=0;i<nEndPos.length-1;i++) Pp{Re|.
{ KE$I!$zO
nEndPos = nStartPos[i+1]; _bsAF^ ;
} ~<Eu
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nEndPos[nEndPos.length-1] = nFileLength; t=(d, kf
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//启动子线程 ,8Eg/
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; k-CW?=
for(int i=0;i<nStartPos.length;i++) lE=&hba
{ dbe\ YE
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), f;{K+\T
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Z;'5A2
nStartPos,nEndPos,i); {TOz}=R"3h
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {JGXdp:SB
fileSplitterFetch.start(); DH9p1)L'
} _&SST)Y|
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), A>9IE(C_
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); >;s!X(6b
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", u{J\X$]
nEndPos = " + nFileLength); zg}#X6\G<_
// fileSplitterFetch[nPos.length-1].start(); v#^ _|
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//等待子线程结束 j|-{*t{/x
//int count = 0; s#BSZP
//是否结束while循环 As>-9p>v
boolean breakWhile = false; r"4&.&6
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while(!bStop) P*!~Z*"
{ 9O4\DRe5c
write_nPos(); |s!<vvp]
Utility.sleep(500); -`cNRd0n
breakWhile = true; Z,_EhEm
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for(int i=0;i<nStartPos.length;i++) ,R$U(,>_0
{ E51'TT9
if(!fileSplitterFetch.bDownOver) P[K42mm
{ y F;KyY{
breakWhile = false; "2_nN]%u-
break; %|(Cb!ySX
} UA3!28Y&E3
} W.sH
if(breakWhile) /Z1>3=G by
break; oAt{#v
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//count++; f\u5=!kjN
//if(count>4) 9i`MUE1Sh
// siteStop(); !*!i&0QC~R
} fn3DoD+I
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System.err.println("文件下载结束!"); &BOG&ot
} yD yMI
catch(Exception e){e.printStackTrace ();} t~V?p'a0ys
} u`gY/]y!
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//获得文件长度 lPA:ho/`:
public long getFileSize()
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{ 5?HoCz]l
int nFileLength = -1; z^Y4:^L~I
try{ }>yQ!3/i
URL url = new URL(siteInfoBean.getSSiteURL()); 92D :!C
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); W61nJ7@
httpConnection.setRequestProperty("User-Agent","NetFox"); zwgO|Qg;
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int responseCode=httpConnection.getResponseCode(); yP "D~u
if(responseCode>=400) ./_4D}
{ S]<%^W'
processErrorCode(responseCode); OV`#/QL
return -2; //-2 represent access is error `ZPV.u/
} a=r^?q'/
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String sHeader; mNQ*YCq.
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for(int i=1;;i++) evE$$# 6R
{ umI6# Vd`=
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Senb_?
//Utility.log(in.readLine()); U&OE*dq
sHeader=httpConnection.getHeaderFieldKey(i); Eemk2>iP?
if(sHeader!=null) >U62vX"
{ qlg?'l$03)
if(sHeader.equals("Content-Length")) I,7n-G_'
{ oLc
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); FQBAt0
break; ~+&Z4CYb
} 4*?JU
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} ^~DClZ
else 0#!Z1:Y
break; /9<62F@zJ"
} WV,j
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} ]-8yZWal
catch(IOException e){e.printStackTrace ();} 7b
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catch(Exception e){e.printStackTrace ();} $@eFSA5k,7
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Utility.log(nFileLength); %R-KkK<S
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return nFileLength; b\^9::oY
} i3<ZFR
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//保存下载信息(文件指针位置) GU]_Z!3
private void write_nPos() !A#(bC
{ ct@i]}"`
try{ ,_U3p ,
output = new DataOutputStream(new FileOutputStream(tmpFile)); Ir$:e*E>
output.writeInt(nStartPos.length); o(3`-ucD`
for(int i=0;i<nStartPos.length;i++) y R_x:,|g
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// output.writeLong(nPos); >-4kO7.V
output.writeLong(fileSplitterFetch.nStartPos); F:cenIaBF
output.writeLong(fileSplitterFetch.nEndPos); q|xic>.
} )kt,E}609
output.close(); O;SD90
} iNEE2BPp
catch(IOException e){e.printStackTrace ();} *S\/l-D
catch(Exception e){e.printStackTrace ();} :'K%&e?7s
} t_{rKb,
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//读取保存的下载信息(文件指针位置) ;`}b
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private void read_nPos() $v~I n
{ #(o( p
try{ r|JZU
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); RtScv
int nCount = input.readInt(); BV512+M
nStartPos = new long[nCount]; -: 8[
nEndPos = new long[nCount]; gs9VCaIa
for(int i=0;i<nStartPos.length;i++) f}?q
{ A"no!AN
nStartPos = input.readLong(); '`/w%OEVC5
nEndPos = input.readLong(); U
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} <"}WpT
input.close(); 3`>nQ4zC
} ZE"Z_E;r
catch(IOException e){e.printStackTrace ();} XE.Y?{,R$
catch(Exception e){e.printStackTrace ();} 6),VN>j
} "&N1$$
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private void processErrorCode(int nErrorCode) mFeoeI,Jv
{ U(u$5
System.err.println("Error Code : " + nErrorCode); #hP&;HZ2>"
} _%6Vcy
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//停止文件下载 Ilv
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public void siteStop() _5SA(0D#9
{ "%fvA;
bStop = true; =d`/BDD
for(int i=0;i<nStartPos.length;i++) ui4*vjd
fileSplitterFetch.splitterStop(); qFg"!w
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} TP?HxO_C
} b8TwV_&|X
//负责部分文件的抓取 5$Aiez~tBq
**FileSplitterFetch.java mZb[Fi
*/ t*cVDA&K