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**SiteFileFetch.java tS[@?qP
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package NetFox; R'aA\k-
import java.io.*; 8-)@q|
import java.net.*; }SGb`l
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public class SiteFileFetch extends Thread { 8b $e)
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SiteInfoBean siteInfoBean = null; //文件信息Bean ?DC;Hk<
long[] nStartPos; //开始位置 &FDWlrGg
long[] nEndPos; //结束位置 I_na^sh*
FileSplitterFetch[] fileSplitterFetch; //子线程对象 ^/7Y3n!|3
long nFileLength; //文件长度 a7e.Z9k!
boolean bFirst = true; //是否第一次取文件 0V'XE1h
boolean bStop = false; //停止标志 9<"l!noy
File tmpFile; //文件下载的临时信息 ]Waa7)}DM
DataOutputStream output; //输出到文件的输出流 hJ(S]1B~G
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) *YWk.
public SiteFileFetch(SiteInfoBean bean) throws IOException eX o@3/
{ cnM`ywKW
siteInfoBean = bean; ^ ]SU (kY
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); rv%^2h<&
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ]dnB,
if(tmpFile.exists ()) I(+%`{Wv
{ 3E;<aCG?
bFirst = false; _8OSDW*D5t
read_nPos(); 7niI65
} Pol
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else "XKd#ncP
{ kj!mgu#T
nStartPos = new long[bean.getNSplitter()]; TL([hR _
nEndPos = new long[bean.getNSplitter()]; 3@mW/l>X
} d0-T\\U
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public void run() *vu
{ LZApz}
//获得文件长度 Ve4@^Jy;
//分割文件 +<n8O~h
//实例FileSplitterFetch pv,I_"
//启动FileSplitterFetch线程 Dqm;twd>
//等待子线程返回 7
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try{ =%9j8wHX
if(bFirst) 0/zgjT|fe
{ m"mU:-jk`
nFileLength = getFileSize(); x: 2 o$+v3
if(nFileLength == -1) .$"69[1H
{ axdRV1+s
System.err.println("File Length is not known!"); xMo'SpVz:
} ?4 lDoP{
else if(nFileLength == -2) Eo_;Nc
{ %o#|zaK
System.err.println("File is not access!"); u$mp%d8
} (W_U<~`t
else &(rR)cG
{ Z_[jah
for(int i=0;i<nStartPos.length;i++) TXK82qTdf
{ Iqb|.v LG
nStartPos = (long)(i*(nFileLength/nStartPos.length)); iPt{v5}]
} 4$8\IJ7G
for(int i=0;i<nEndPos.length-1;i++) S{c;n*xf
{ ??=7pFm
nEndPos = nStartPos[i+1]; oOHr~<
} IsP!ZcV;
nEndPos[nEndPos.length-1] = nFileLength; Vc|uQ8Mi
} G:{\-R'
} r#/Bz5Jb*
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//启动子线程 (Kaunp5_`
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; K"9V8x3Wg
for(int i=0;i<nStartPos.length;i++) y`-5/4
{ Qb&gKQtt@
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), F[==vte|
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), RTv zS]
nStartPos,nEndPos,i); oH kjMqju
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qn~:B7f
fileSplitterFetch.start(); 5`[B:<E4
} w1
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), kIYV%O
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); &p:GB_
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", N!^5<2z@eT
nEndPos = " + nFileLength); kS$m$
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// fileSplitterFetch[nPos.length-1].start(); a1#
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//等待子线程结束 2~2j?\AEd.
//int count = 0; FK.Qj P:
//是否结束while循环 *p7_rY
boolean breakWhile = false; \x+ "1
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while(!bStop) \9s x_T
{ -87]$ ax
write_nPos(); 6T{SRN{
Utility.sleep(500); z+%74O"c
breakWhile = true; Shb"Jc_i
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for(int i=0;i<nStartPos.length;i++) 9U~sRj=D
{ $|r
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if(!fileSplitterFetch.bDownOver) !x1ivP
{ s+XDtO
breakWhile = false; dNgjM
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break; APT/z0X>
} :Y2J7p[+
} sn.&|)?Fi
if(breakWhile) "N*i!h
break; X"3Za[9j
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//count++; ,Frdi>7 ~
//if(count>4) OFcqouGE
// siteStop(); rLOdQN
} (w{C*iB
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System.err.println("文件下载结束!"); R
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} 7T}r]C.
catch(Exception e){e.printStackTrace ();} o!ycVY$yW
} )NCkq~M
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//获得文件长度 ;m cu(J
public long getFileSize() *]RCfHo\=
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int nFileLength = -1; 2%(RB4+
try{ *oU-V#
URL url = new URL(siteInfoBean.getSSiteURL()); '`fz|.|cbB
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <tp#KZE
httpConnection.setRequestProperty("User-Agent","NetFox"); u.Z,HsEO b
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int responseCode=httpConnection.getResponseCode(); 6`l7saHXE
if(responseCode>=400) l9X\\uG&
{ T&PLvyBL
processErrorCode(responseCode); |8YP8o
return -2; //-2 represent access is error {r2fIj~V
} 8'6$t@oT9w
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String sHeader; a#o6Nv
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for(int i=1;;i++) fK{[=xMr@
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); =j{r95)|u
//Utility.log(in.readLine()); b&1-tYV
sHeader=httpConnection.getHeaderFieldKey(i); <m3or
if(sHeader!=null) c/\$AJV.H
{ #\)tz z
if(sHeader.equals("Content-Length")) yL>wCD,L
{ t=Um@;wh
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ,Y3wXmG
break; I_h{n{,sr
} 81<0B@E
} X0"f>.Lg
else hpVu
break; Qo;#}%}^^
} 8${Yu
} eX@7f!uz
catch(IOException e){e.printStackTrace ();} J\ V.J/
catch(Exception e){e.printStackTrace ();} GxR, 3
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Utility.log(nFileLength); }lzN)e
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return nFileLength; OnKPD=<
} AZTn!hrU
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//保存下载信息(文件指针位置) &G"r>,HU
private void write_nPos() &RP}w%I1
{ j$8i!C
try{ q
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output = new DataOutputStream(new FileOutputStream(tmpFile)); {UR&Y
output.writeInt(nStartPos.length); j2/3NF5&
for(int i=0;i<nStartPos.length;i++) sUP!'Av
{ @~l?hf
// output.writeLong(nPos); Jqt&TqX@s
output.writeLong(fileSplitterFetch.nStartPos); >`@yh-'r
output.writeLong(fileSplitterFetch.nEndPos); S=wJ{?gzAK
} njy^<7;
output.close(); V^U1o[`
} i!=28|_
catch(IOException e){e.printStackTrace ();} ?98]\pI
catch(Exception e){e.printStackTrace ();} Dxwv\+7]
} 0y3<Ho,+$
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//读取保存的下载信息(文件指针位置) %$l^C!qcY
private void read_nPos() 8uO@S*)0
{ qWzzUM1=
try{ l^IPN'O@
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); {vJ)!'Eh
int nCount = input.readInt(); #!FLX*,
nStartPos = new long[nCount]; Bw[jrK
nEndPos = new long[nCount]; l?/.uNw
for(int i=0;i<nStartPos.length;i++) 8zRb)B+
{ %ycCNS
nStartPos = input.readLong(); :~2An-V
nEndPos = input.readLong(); kH43 T
} [?$|
input.close(); Gkr^uXNg#
} ?"aj&,q+
catch(IOException e){e.printStackTrace ();} R "&(Ae?LR
catch(Exception e){e.printStackTrace ();} /Lc=
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} 2z\4?HJy
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private void processErrorCode(int nErrorCode) Vd{h|=J
{ #NVqS5
System.err.println("Error Code : " + nErrorCode); ] _/d
} YW}1iT/H
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//停止文件下载 $J |oVVct
public void siteStop() Dk'EKT-
{ a*pZcv<
bStop = true; %acy%Sy
for(int i=0;i<nStartPos.length;i++) B=;pyhc
fileSplitterFetch.splitterStop(); G@)I
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} vl@t4\@3
} 1 ]@}+H
//负责部分文件的抓取 9@yP;{Q
**FileSplitterFetch.java bw7!MAXd
*/ LC/w".oq?
package NetFox; ^/W7Xd(s
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import java.io.*; 6[9E^{(z
import java.net.*; 4M8AYh2)
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public class FileSplitterFetch extends Thread { /s%I(iP4
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String sURL; //File URL ~^.&nph
long nStartPos; //File Snippet Start Position 6,xoxNoPP3
long nEndPos; //File Snippet End Position g)'tr
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int nThreadID; //Thread's ID `~(C\+gUp
boolean bDownOver = false; //Downing is over Siw9_c
boolean bStop = false; //Stop identical r2T?LO0N{
FileAccessI fileAccessI = null; //File Access interface LoG@(g&)
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 33kI#45s
{ Yf:utCvv
this.sURL = sURL; Kfj*uzKB
this.nStartPos = nStart; 2t { Cpw
this.nEndPos = nEnd; s8|#sHT
nThreadID = id; A*pihBo7
fileAccessI = new FileAccessI(sName,nStartPos);//定位 2H<?
} N,ik&NIWy
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public void run() yT&