/* y{qKb:~wv
**SiteFileFetch.java BG@[m
*/ g>Kh? (
package NetFox; htqC~B{1E
import java.io.*; ZP7wS
import java.net.*; `l}r&z(8
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public class SiteFileFetch extends Thread { ^F$iD (f
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SiteInfoBean siteInfoBean = null; //文件信息Bean >:U{o!N`#_
long[] nStartPos; //开始位置 Nxt z1
long[] nEndPos; //结束位置 W#[3a4%m
FileSplitterFetch[] fileSplitterFetch; //子线程对象 Fm.IRu<\`
long nFileLength; //文件长度 Z|Xv_Xo|4
boolean bFirst = true; //是否第一次取文件 xXc3#n
boolean bStop = false; //停止标志 ,HO@bCK
File tmpFile; //文件下载的临时信息 vn=0=(
DataOutputStream output; //输出到文件的输出流 <3aW3i/jTc
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) a{8g9a4
public SiteFileFetch(SiteInfoBean bean) throws IOException 8U&93$
{ `wLa.Gzj
siteInfoBean = bean; 0Z~G:$O/i
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); y <21~g=
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); EY
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if(tmpFile.exists ()) sr,8Qd0M
{ h7W<$\P
bFirst = false; B6a
read_nPos(); 8:(e~?
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} 2JRX ;s~
else * d[sja+
{ RjCEo4b-.H
nStartPos = new long[bean.getNSplitter()]; 79(Px2H2
nEndPos = new long[bean.getNSplitter()]; f<~S0[H
} }>u<,
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} mq~L1<f
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public void run() ;;l-E>X0
{ |yow(2(F@
//获得文件长度 <swYo<?J#
//分割文件 [6t!}q
//实例FileSplitterFetch |#!P!p}
//启动FileSplitterFetch线程 ? v2JuhRe
//等待子线程返回 !NFP=m1
try{ r6eApKZ>f6
if(bFirst) 0?nm`9v6
{ ,=kQJ|
nFileLength = getFileSize(); |F#L{=B
if(nFileLength == -1) t{)J#8:g
{ CK+_T}+-
System.err.println("File Length is not known!"); m`lsUN,
} Z}'"c9oB
else if(nFileLength == -2) )Dq/fW
{ :.M"M$MRp8
System.err.println("File is not access!"); KUqD<Jj?
} HNtl>H
else FsYsQ_,R3
{ ,d34v*U
for(int i=0;i<nStartPos.length;i++) ()v{HBi
{ [m3k_;[
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 6+[7UH~pm^
} f}>S"fFI
for(int i=0;i<nEndPos.length-1;i++) hd}"%9p
{ ~?)ST?&
nEndPos = nStartPos[i+1]; mT2Fn8yC1
} PjkJsH
nEndPos[nEndPos.length-1] = nFileLength; %A<|@OSdOa
} "Q ~-C|x
} z2lEHa?w
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//启动子线程 LMvsYc~]q
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; yXx}'=&!0
for(int i=0;i<nStartPos.length;i++) 7BhRt8FSD+
{ h[O!kwE
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), oLXQ#{([
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Vi~F
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nStartPos,nEndPos,i); Y"&c .
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); c*g(R.!
fileSplitterFetch.start(); ]+B#SIC;
} :8~*NSEFd
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3[L)q2;}$N
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); "K8<X
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", E}$K&<J'-
nEndPos = " + nFileLength); -l!;PV S|
// fileSplitterFetch[nPos.length-1].start(); QDC]g.x
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//等待子线程结束 X>#!s Lt
//int count = 0; QxmVImn"
//是否结束while循环 5!PU+9Kh
boolean breakWhile = false; m{bw(+r
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while(!bStop) ega< {t
{ :hp=>^$Y
write_nPos(); sGCV um}
Utility.sleep(500); WlnI`!)d
breakWhile = true; U9KnW]O%"
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for(int i=0;i<nStartPos.length;i++) N(]>(S
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{ .TURS
if(!fileSplitterFetch.bDownOver) ;TK:D=p4
{ ,zLi{a6
breakWhile = false; /EOtK|E
break; @Kd lX>i
} m3k}Q3&6Z
} v|XEC[F
if(breakWhile) hNV"{V3`{
break; GJA3
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//count++; }cll? 2
//if(count>4) PF1m :Iz`d
// siteStop(); zX!zG<<K
} 3H%oTgWk
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System.err.println("文件下载结束!"); mb*L'y2r
} ]y,6
catch(Exception e){e.printStackTrace ();} Mp~E$f
} 1@H3!V4
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//获得文件长度 AG#5_0]P~
public long getFileSize() '(kySf[
{ )ll`F7B-
int nFileLength = -1; h{]l?6`
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URL url = new URL(siteInfoBean.getSSiteURL()); "YGs<)S
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /0 ,#c2aq
httpConnection.setRequestProperty("User-Agent","NetFox"); bf
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int responseCode=httpConnection.getResponseCode(); }Y5Sf"~M
if(responseCode>=400) gUCv#:
{ V&DS+'P
processErrorCode(responseCode); Gt[!q\^?
return -2; //-2 represent access is error p3*}! ez4
} gJ>?<F;
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String sHeader; Z8Fbx+~"
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for(int i=1;;i++) itM6S$
{ nVoPTr
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ());
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//Utility.log(in.readLine()); _.Y?BAQ
sHeader=httpConnection.getHeaderFieldKey(i); Xb42R1
if(sHeader!=null) A1p;Ye>o~
{ s} ,p>8
if(sHeader.equals("Content-Length")) :?{ **&=
{ Nl7"|()e
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Fk>/
break;
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} rZZueYuXO
} u(?
else J;+iW*E:
break; L
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} &|H?J,>
} '1=t{Rw
catch(IOException e){e.printStackTrace ();} MZE8Cvq0
catch(Exception e){e.printStackTrace ();} 7
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Utility.log(nFileLength); ;*+jCL2F
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return nFileLength; j%b/1@I
} O GrVy=rd
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//保存下载信息(文件指针位置) 2<yE3:VX
private void write_nPos() y&A*/J4P
{ .8l\;/o|
try{ ]xA;*b;|h
output = new DataOutputStream(new FileOutputStream(tmpFile)); uU6+cDp
output.writeInt(nStartPos.length); iU{F\>
for(int i=0;i<nStartPos.length;i++) c0u!V+V%
{ dV8mI,h
// output.writeLong(nPos); !tFs(![
output.writeLong(fileSplitterFetch.nStartPos); m"~$JA u
output.writeLong(fileSplitterFetch.nEndPos); [z`U9J
} N>7INK
output.close(); `R fhxzI
} cgm]{[f
catch(IOException e){e.printStackTrace ();} ^!1mChf
catch(Exception e){e.printStackTrace ();} 9rtcI[&?0
} $ W(m
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//读取保存的下载信息(文件指针位置) d$kGYMT"
private void read_nPos() y_38;8ex
{ YQiTx)_
try{ VLc=!W}
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); d> `9!)
int nCount = input.readInt(); (H<S&5[
nStartPos = new long[nCount]; sn/^#Aa=N
nEndPos = new long[nCount]; G1vWHa7n;f
for(int i=0;i<nStartPos.length;i++) *\I?gDON
{ myFjw@
nStartPos = input.readLong(); 7Cx%G/(
nEndPos = input.readLong(); wnP#.[,V
} <Jo_f&&{
input.close(); c{6!}0Q4
} MMD4b}p
catch(IOException e){e.printStackTrace ();} 3.?PdK&C
catch(Exception e){e.printStackTrace ();} Ej
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} ;_,=
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private void processErrorCode(int nErrorCode) 6YQ&+4
{ sE-E\+
System.err.println("Error Code : " + nErrorCode); GNqw]@'Yf
} ~9p*zC3M
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//停止文件下载 ITRv^IlF
public void siteStop() uY,&lX+!
{ *n N;!*J
bStop = true; oJUVW"X6
for(int i=0;i<nStartPos.length;i++) ,+KZn}>
fileSplitterFetch.splitterStop(); s$:F^sxb
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} VieC+Kk
} C6ZM#}I$l
//负责部分文件的抓取 T#Qn\8
**FileSplitterFetch.java #]oVVf_
*/ .:*V
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package NetFox; =E8lpN'
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import java.io.*; N't*e Ci
import java.net.*; C+cSy'VIK!
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public class FileSplitterFetch extends Thread { DT8|2"H
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String sURL; //File URL *{P"u(K
long nStartPos; //File Snippet Start Position ,o]"G[Jk
long nEndPos; //File Snippet End Position 0iinr:=u
int nThreadID; //Thread's ID !uii|"
boolean bDownOver = false; //Downing is over X5cl'J(j9
boolean bStop = false; //Stop identical bBc<yaN
FileAccessI fileAccessI = null; //File Access interface >lU[
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