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**SiteFileFetch.java ' pN[H\Ia
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package NetFox; R`HC
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import java.io.*; ye^*Z>|
import java.net.*; (/ qOY
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public class SiteFileFetch extends Thread { ~NV 8avZ
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SiteInfoBean siteInfoBean = null; //文件信息Bean ,wYA_1$$H
long[] nStartPos; //开始位置 yQz6K6p
long[] nEndPos; //结束位置 ?h|&kRq
FileSplitterFetch[] fileSplitterFetch; //子线程对象 G4;5$YGG
long nFileLength; //文件长度 QWQJSz5
boolean bFirst = true; //是否第一次取文件 [:BD9V
boolean bStop = false; //停止标志 I6e[K(7NY
File tmpFile; //文件下载的临时信息 Cm"7f!(#
DataOutputStream output; //输出到文件的输出流 _c $F?9:
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) A)%!9i)
public SiteFileFetch(SiteInfoBean bean) throws IOException p6c&vEsNj
{ {9Ug9e{
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siteInfoBean = bean; %o
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); [,0[\NC
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 2
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if(tmpFile.exists ()) Ys@OgdS@:
{ V'^E'[Dd{
bFirst = false; I83 _x|$FZ
read_nPos(); %M5{-pJ|C
} or
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else e.VQ!)>
{
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nStartPos = new long[bean.getNSplitter()]; b!4Z~d0=
nEndPos = new long[bean.getNSplitter()]; ?#~km0~F)
} q@&6&cd
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} SVn $!t
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public void run() 9<Ks2W.N
{ A}4 ",
//获得文件长度 Tf40lv+{
//分割文件 +5x{|!Pn
//实例FileSplitterFetch AL{iQxQ6
//启动FileSplitterFetch线程 e'|IRhr
//等待子线程返回 -2B3 xIZJ
try{ pEp$J;
if(bFirst) HChlkj'7w0
{ |)*9BN
nFileLength = getFileSize(); s4`,Z*H
if(nFileLength == -1) 7{lWg x
{ NjbIt=y
System.err.println("File Length is not known!"); : G'a"%x
} v^dQ%+}7>
else if(nFileLength == -2) l4gZHMh'
{ m.68ctaa
System.err.println("File is not access!"); Ou`;HN;[
} "&C>=
else c'DNO~H
{ 3b?8<*
for(int i=0;i<nStartPos.length;i++) Y|6gg
{ =Eb$rc)
nStartPos = (long)(i*(nFileLength/nStartPos.length)); lhX4MB"
} 4_-L1WH
for(int i=0;i<nEndPos.length-1;i++) K;ocs?rk/
{ O%f{\Fr
nEndPos = nStartPos[i+1]; T"3:dkQw
} 2cjbb kq
nEndPos[nEndPos.length-1] = nFileLength; &2nICAN[
} ;+1ooeU
} /r8sL)D+
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//启动子线程 z.|[g$F
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 5+2qx)FZ
for(int i=0;i<nStartPos.length;i++) CfT(a!;Eox
{ ~ike&k{
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @&x'.2[nv
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), A
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nStartPos,nEndPos,i); ,Jx.Kj.,
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); EE*|#
fileSplitterFetch.start(); LLL;SNY
} A2!pbeG
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), M/,lP
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); b7y#uL1AE
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 6tGF
nEndPos = " + nFileLength); kQp*+ras
// fileSplitterFetch[nPos.length-1].start(); 2UIZ<#|D>s
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//等待子线程结束 _gEojuaN
//int count = 0; ;oO_5[,M
//是否结束while循环 ?Yx2q_KZk
boolean breakWhile = false; Q!r&vQ/g
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while(!bStop) P$]K
{ lavy?tFer
write_nPos(); )%<,JD
Utility.sleep(500); x=-(p}0o;<
breakWhile = true; v4K! BW
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for(int i=0;i<nStartPos.length;i++) =q>lP+
{ <m0=bm{j
if(!fileSplitterFetch.bDownOver) I
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{ A
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breakWhile = false; S;u.Ds&
break; qO/3:-
} \6bvk _
} `l6OQdB3W
if(breakWhile) 138v{Z
break; +p&zM3:9w
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//count++; !E|R3eX_
//if(count>4) 8C[eHC*r
// siteStop(); I!}V+gu=
} 2bG92
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System.err.println("文件下载结束!");
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} w%::~]
catch(Exception e){e.printStackTrace ();} |`pBI0Sjo
} _yF@k~
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//获得文件长度 hsJ^Au=})w
public long getFileSize() nf[KD,f
{ i[MBO`FF
int nFileLength = -1; EQk omjv
try{ deq5u>
URL url = new URL(siteInfoBean.getSSiteURL()); +Z-{6C
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); C1(RgY|
httpConnection.setRequestProperty("User-Agent","NetFox"); %%I:L~c
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int responseCode=httpConnection.getResponseCode(); x>,wmk5)
if(responseCode>=400) ~C3J-z<
{ i3KAJ@
processErrorCode(responseCode); XH0o8\.
return -2; //-2 represent access is error X\w["!B
} o(
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String sHeader; mkPqxzxbrL
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for(int i=1;;i++) O/$41mK+!
{ ZsCwNZR
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); XiV
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//Utility.log(in.readLine()); N H:Bdl3
sHeader=httpConnection.getHeaderFieldKey(i); ,aq>9\pi
if(sHeader!=null) N)a5~<fBG
{ !KT.p2\
if(sHeader.equals("Content-Length")) t/%[U,m
{ 90,UhNz9D
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); h,-i\8gq
break; fZS'e{V
}
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} `Fe/=]<$
else 3RI6+Cgmn
break; @3 +
} lPC{R k.\C
} ^vv1cft
catch(IOException e){e.printStackTrace ();} T-lP=KF=
catch(Exception e){e.printStackTrace ();} oK<H/76x
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Utility.log(nFileLength); ar'VoL}
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return nFileLength; blP8"(U
} xF YHv@g
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//保存下载信息(文件指针位置) ep`8LQf
private void write_nPos() EG_P^<z
{ mq(K_
try{ >MhZ(&iD
output = new DataOutputStream(new FileOutputStream(tmpFile)); HCYy9
output.writeInt(nStartPos.length); ae2I,Qt%
for(int i=0;i<nStartPos.length;i++) -]YsiE?r
{ muBl~6_mb2
// output.writeLong(nPos); P!)F1U]!
output.writeLong(fileSplitterFetch.nStartPos); t: ,lz8Y~
output.writeLong(fileSplitterFetch.nEndPos); EiDpy#f}
} '!4\H"t
output.close(); -- IewW
} p]toDy-}
catch(IOException e){e.printStackTrace ();} naeppBo
catch(Exception e){e.printStackTrace ();} l Dwq[ I]w
} }XRfHQk
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//读取保存的下载信息(文件指针位置) D$D;'Kij
private void read_nPos() @00&J~D
{ Q'j00/K
try{ eSW}H_3
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); -:Juxh
int nCount = input.readInt(); V.yDZ"
nStartPos = new long[nCount]; dWo$5Bls<A
nEndPos = new long[nCount]; |h((SreO
for(int i=0;i<nStartPos.length;i++) hsQ*ozv[)
{ k>E/)9%ep2
nStartPos = input.readLong(); 3cNr~`7
nEndPos = input.readLong(); 'k<~HQr
} K8QEHc:
input.close(); ,ob)6P^rw
} [W dxMU
catch(IOException e){e.printStackTrace ();} JxRn)D
catch(Exception e){e.printStackTrace ();} .g=D70
} 78]( ZYJV
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private void processErrorCode(int nErrorCode) -9s&OKo`({
{ F)S?>P&
System.err.println("Error Code : " + nErrorCode);
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} xR&Le/3+
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//停止文件下载 P4s,N|bs`
public void siteStop() TLz>|gr
{ _o>?\ :A
bStop = true; #!4
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for(int i=0;i<nStartPos.length;i++) 'W~6-c9y
fileSplitterFetch.splitterStop(); KM-7w66V
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} [>:9#n
} #ePtfRzJ
//负责部分文件的抓取 dp'k$el
**FileSplitterFetch.java Z.U8d(
*/ Cs^'g'
package NetFox; j$z!kd+%
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import java.io.*; 1X#gHstD
import java.net.*; qu/b:P
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public class FileSplitterFetch extends Thread { XhJYs q]]J
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String sURL; //File URL
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long nStartPos; //File Snippet Start Position [4\n(/
long nEndPos; //File Snippet End Position l}9E0^AS
int nThreadID; //Thread's ID |6Qn/N$+f
boolean bDownOver = false; //Downing is over \7*"M y*
boolean bStop = false; //Stop identical Q^oB`)k
FileAccessI fileAccessI = null; //File Access interface JcW<