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**SiteFileFetch.java o{`x:
*/ CuvY^["
package NetFox; !'p<Kh[i
import java.io.*; @uCi0P t
import java.net.*; jH!;}q
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public class SiteFileFetch extends Thread { rDhQ3iCqo
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SiteInfoBean siteInfoBean = null; //文件信息Bean ZY]$MZf5yo
long[] nStartPos; //开始位置 ^4+NPk
long[] nEndPos; //结束位置 kN
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FileSplitterFetch[] fileSplitterFetch; //子线程对象 lZL+j6Q
long nFileLength; //文件长度 1W{ oj
boolean bFirst = true; //是否第一次取文件 "nCK%w=
boolean bStop = false; //停止标志 5WJ ~%"O
File tmpFile; //文件下载的临时信息 n qO*z<
DataOutputStream output; //输出到文件的输出流 G)%V 3h
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) )9_W"'V
public SiteFileFetch(SiteInfoBean bean) throws IOException xc 1d[dCdp
{ _<#92v!F
siteInfoBean = bean; q+9->D(6
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); nPdkvs
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); i .uyfV&F
if(tmpFile.exists ()) q
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{ O>qlWPht
bFirst = false; 41<h|WA
read_nPos(); T`":Q1n
} ))f@9m
else z+7V}aPM
{ bE.<vF&
nStartPos = new long[bean.getNSplitter()]; 4@3 \Ihv
nEndPos = new long[bean.getNSplitter()]; c-(RjQ~M5
} N,-C+r5}<4
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} SyVXXk 0
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public void run() ) hs&?:)
{ 6E-eD\?I&
//获得文件长度 JCnHEH
//分割文件 O}zHkcL
//实例FileSplitterFetch npltsK):
//启动FileSplitterFetch线程 4 H0rS'5d
//等待子线程返回 +_J@8k
try{ UTh2?Rh/
if(bFirst) )/@KdEA:
{ fc@<' -VA
nFileLength = getFileSize(); v77UE"4|c
if(nFileLength == -1) 2=fM\G
{ Rf8Obk<
System.err.println("File Length is not known!"); `WOoC
} ftTD-d
else if(nFileLength == -2) DSqA}r
{ NMK$$0U
System.err.println("File is not access!"); ygnZ9ikh<-
} hRX9Du`$
else =Pw{1m|k
{ $I*}AUp
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for(int i=0;i<nStartPos.length;i++) ,.p
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{ Ve%ua]qA
nStartPos = (long)(i*(nFileLength/nStartPos.length)); U<0Wa>3zj
} ;&=CZ6vH
for(int i=0;i<nEndPos.length-1;i++) }.)R#hG?
{ S8dfe~ |7:
nEndPos = nStartPos[i+1]; /B?wn=][
} aC2Vz9e
nEndPos[nEndPos.length-1] = nFileLength; 8QJr!#u
} jFdgFKc)
} 36(qe"s
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//启动子线程 ~/K&=xE
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; #rX^)2
for(int i=0;i<nStartPos.length;i++) WUie`p
{ qfl!>
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Zqm%qm:
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), X5/j8=G H`
nStartPos,nEndPos,i); =t-Ud^3
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); !9
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fileSplitterFetch.start(); ;%2+Tc-7I
}
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), lhYJectJa
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Al*=%nY
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", j1g$LAe
nEndPos = " + nFileLength); '+/mt_re=
// fileSplitterFetch[nPos.length-1].start(); 9ns( F:
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//等待子线程结束 Ur< (TM
//int count = 0; J[6/dM
//是否结束while循环 elGBX
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boolean breakWhile = false; `PtB2,?
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while(!bStop) .jqil0#)Y"
{ jc_k\
write_nPos(); /r'Fq
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Utility.sleep(500); Z72%Bv
breakWhile = true; c!6v-2ykv
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for(int i=0;i<nStartPos.length;i++) y|O3*`&m
{ TDR|*Cs
if(!fileSplitterFetch.bDownOver) L@[}sMdq(
{ V)~b+D
breakWhile = false; 3l~7
break; 1YMi4.
} n]#YL4j
} !O!:=wq
if(breakWhile) kYkA^Aq
break; +1cr6a
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//count++; yxu7YGp%
//if(count>4) ]SA/KV
// siteStop(); v2]N5
} ?SYmsaSr5
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System.err.println("文件下载结束!"); X1B)(|7$
} H?r~% bh
catch(Exception e){e.printStackTrace ();} :^?-bppYW
} ,/p+#|>C=
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//获得文件长度 Hfj.8$
public long getFileSize() nX7F<k4G2
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int nFileLength = -1; WNjG/U
try{ bvB7d`wx
URL url = new URL(siteInfoBean.getSSiteURL()); #B?lU"f8q^
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); k8n9zJ8
httpConnection.setRequestProperty("User-Agent","NetFox"); ECL{`m(#n
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int responseCode=httpConnection.getResponseCode(); 8hww({S2
if(responseCode>=400) X=?9-z]
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{ ~P}ng{x4z
processErrorCode(responseCode); cy6YajOk7
return -2; //-2 represent access is error TW 1`{SM
} 4s|qxCks
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String sHeader; #lMIs4i.
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for(int i=1;;i++) H'$H@Kn]-
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); S3HyB
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//Utility.log(in.readLine()); )Dhx6xM[a
sHeader=httpConnection.getHeaderFieldKey(i); :_HdOm
if(sHeader!=null) /z!y[ri+J
{ W^HE1Dt]
if(sHeader.equals("Content-Length")) 6X'0 T}
{ 7fWZ/;p
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Xajt][
break; wU'+4N".
} J=kf KQV
} +pK 35u
else mBye)q$
break; XkUwO ]
} @||nd,i`n~
} &QQ6F>'T
catch(IOException e){e.printStackTrace ();} D5Rp<PBq,
catch(Exception e){e.printStackTrace ();} } @3q;u )
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Utility.log(nFileLength); d7X7_
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return nFileLength; MR4k#{:w
} '.%Omc
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//保存下载信息(文件指针位置) e+#k\x
private void write_nPos() Ht}?=ZzW
{ [q0^Bn}h
try{ ,bM):
output = new DataOutputStream(new FileOutputStream(tmpFile)); <h+UC# .x
output.writeInt(nStartPos.length); nRX'J5Q
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for(int i=0;i<nStartPos.length;i++) (u@X5O(a
{ NyC&j`d
// output.writeLong(nPos); 2Kr8#_) 0
output.writeLong(fileSplitterFetch.nStartPos); 7;.Iat9gMf
output.writeLong(fileSplitterFetch.nEndPos); z^9rM"
} fWIWRsy%
output.close(); lOb(XH9
} -+2A@kmEJ
catch(IOException e){e.printStackTrace ();} 4%<wxrod
catch(Exception e){e.printStackTrace ();} G[`2Nd<
} B )\;Ja
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//读取保存的下载信息(文件指针位置) aS>cXJ;=
private void read_nPos() ;U a48pSv
{ ?Ec{%N%
try{ C^_m>H3b
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); L"c.15\
int nCount = input.readInt(); e^;:iJS
nStartPos = new long[nCount]; E}0g
nEndPos = new long[nCount]; 1jBIi
for(int i=0;i<nStartPos.length;i++) ~-sG&u>
{
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nStartPos = input.readLong(); j-i>Jd7
nEndPos = input.readLong(); 6h&t%T
} \v{HjqVkC
input.close(); 5K&A2zC|
} }2c&ARQ.m>
catch(IOException e){e.printStackTrace ();} 3)e{{]6
catch(Exception e){e.printStackTrace ();} kQ2WdpZ/
} <dXeP/1w`
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private void processErrorCode(int nErrorCode)
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{ W"t^t|H'~
System.err.println("Error Code : " + nErrorCode); -I*vl
} ApggTzh@
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//停止文件下载 ^e\$g2).
public void siteStop() 9R-2\D]
{ d mTZEO
bStop = true; M,oZ_tY%
for(int i=0;i<nStartPos.length;i++) Ui1s]R
fileSplitterFetch.splitterStop(); dxS5-aWy9w
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} y
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} Jko=E
//负责部分文件的抓取
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**FileSplitterFetch.java <4zSh3
*/ fceO|mSz_
package NetFox; T>hm\ !
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import java.io.*; "So"oT1
import java.net.*; +RiI5.$=Z
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public class FileSplitterFetch extends Thread { X -=M>H^
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String sURL; //File URL oxI?7dy5
long nStartPos; //File Snippet Start Position 7GErh,
long nEndPos; //File Snippet End Position &U([Wd?E2
int nThreadID; //Thread's ID BbL]0i
boolean bDownOver = false; //Downing is over =CdrhP_
boolean bStop = false; //Stop identical 6p&uifY}tR
FileAccessI fileAccessI = null; //File Access interface >b:5&s\9
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException DH i@ujr
{ f|/ ,eP$
this.sURL = sURL; g "c7$
this.nStartPos = nStart; 2BT+[
this.nEndPos = nEnd; (_3'nFg
nThreadID = id; wQ9@
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fileAccessI = new FileAccessI(sName,nStartPos);//定位 LZ&I<ID`-
} udc9KuR@
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public void run() TnKOr~ @*
{ hOFvM&$
while(nStartPos < nEndPos && !bStop) >r}?v3QW
{ }!|$;3t+c
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try{ 6p3cMJ'8y
URL url = new URL(sURL); Y;E'gP-J
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); xh25 *y
httpConnection.setRequestProperty("User-Agent","NetFox"); i],~tT|P
String sProperty = "bytes="+nStartPos+"-"; 7A$mZPKh
httpConnection.setRequestProperty("RANGE",sProperty); O@dK^o
Utility.log(sProperty); -Edi"B4K
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InputStream input = httpConnection.getInputStream(); /t2H%#v{
//logResponseHead(httpConnection); *Utx0Me
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byte[] b = new byte[1024]; B
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int nRead; 4N3O<)C)@
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) k$DRX)e
{ <QaUq`,
nStartPos += fileAccessI.write(b,0,nRead); w`M`F<_\:
//if(nThreadID == 1) RjrQDh|((
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 7;r3Bxa
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} 8$IUit h
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Utility.log("Thread " + nThreadID + " is over!"); `JGW8 _
bDownOver = true; jzWgyI1b
//nPos = fileAccessI.write (b,0,nRead); #~qzaETv,
} fwUF5Y
catch(Exception e){e.printStackTrace ();} Zz'g&ew