/* dM"Suw
**SiteFileFetch.java YX38*Ml+V
*/ dXgj
package NetFox; zk8s?$
import java.io.*; 1euL+zeh
import java.net.*; gZ6]\l]J{
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public class SiteFileFetch extends Thread { )`?Es8uW
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SiteInfoBean siteInfoBean = null; //文件信息Bean wzhM/Lmo\z
long[] nStartPos; //开始位置 :eqDEmr>
long[] nEndPos; //结束位置 \"B oTi'2!
FileSplitterFetch[] fileSplitterFetch; //子线程对象 /*J}7
long nFileLength; //文件长度 is K~=
boolean bFirst = true; //是否第一次取文件 fNOsB^Y
boolean bStop = false; //停止标志 t b5k|
File tmpFile; //文件下载的临时信息 kW>Q9Nc=V
DataOutputStream output; //输出到文件的输出流 z+5l:f
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) kBYZNjSz
public SiteFileFetch(SiteInfoBean bean) throws IOException UD6D![e
{ '3B`4W,
siteInfoBean = bean; 1SoKnfz{6
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); L<bZVocOb_
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Onoi ^MDy
if(tmpFile.exists ()) ZzET8?8
{ HlEp
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bFirst = false; "TB4w2?=
read_nPos(); -:IG{3fnu
} ],vUW#6$N
else 6B
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nStartPos = new long[bean.getNSplitter()]; 9B&QY 2v
nEndPos = new long[bean.getNSplitter()]; 0MDdcjqw
} :|/bEP]p/
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} ro{q':Z3
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public void run() w5,p9f}.
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//获得文件长度 Ek\fx*Lz
//分割文件 uJVu:E.#1
//实例FileSplitterFetch EacqQFErl
//启动FileSplitterFetch线程 i-oi?x<u&(
//等待子线程返回 KfpDPwP@
try{ OU+oS,
if(bFirst) PGZ .\i
{ kb<Nuw
nFileLength = getFileSize(); u=B_c A}:
if(nFileLength == -1) Z'c{4b`N
{ %Hdg,NH
System.err.println("File Length is not known!"); Oq~>P!=
} ;n?72&h
else if(nFileLength == -2) W70J2
{ g`~c|bx
System.err.println("File is not access!"); lN94 b3_W
} BEM_y:#
else OMG.64DX .
{ p-n_
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for(int i=0;i<nStartPos.length;i++) Pk444_"=
{ D)z'FOaI
nStartPos = (long)(i*(nFileLength/nStartPos.length)); q]Gym 7o
} R~u0!
for(int i=0;i<nEndPos.length-1;i++) DArEIt6Q
{ [OJ@{{U%
nEndPos = nStartPos[i+1]; K%9PIqK?4
} AnVj
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nEndPos[nEndPos.length-1] = nFileLength; v w$VRPW
} .&d]7@!qy
} @=ABO"CQ
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//启动子线程 zA[6rYXY
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; PZ2$ [s0W
for(int i=0;i<nStartPos.length;i++) et]-;(M
{ \F=w~
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fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ^luAX
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), (9q61zA
nStartPos,nEndPos,i); "orZje9AC
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); cQEK>aAd
fileSplitterFetch.start(); AP.WTFf
} %0 (,f
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hPtSY'_@_
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); w :2@@)pr
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Sd?:+\bS;
nEndPos = " + nFileLength); :@KU_U)\
// fileSplitterFetch[nPos.length-1].start(); {`fhcEC
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//等待子线程结束 ]F5?>du@~
//int count = 0; ##VS%&{
//是否结束while循环 g+8{{o=
boolean breakWhile = false; +P,hT
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while(!bStop) lVY`^pw?
{ !fF1tW
write_nPos(); D-*`b&i48
Utility.sleep(500); S8;Dk@rr(y
breakWhile = true; g+BW~e)
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for(int i=0;i<nStartPos.length;i++) z VleJ!d
{ tU7,nE>p
if(!fileSplitterFetch.bDownOver) A2 r1%}{
{ )@)wcf!b
breakWhile = false; |GgFdn`>
break; ? _36uJo}
} "e62g
} +@D [%l|
if(breakWhile) SPKGbp&
break; ,lSt}Lml
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//count++; _YzItge*
//if(count>4) Q" BIk
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// siteStop(); 8
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} kQ4-W9u
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System.err.println("文件下载结束!"); k&|L"N|w
}
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catch(Exception e){e.printStackTrace ();} JmB7tRM8
} Lf _`8Ux
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//获得文件长度 o>x*_4[
public long getFileSize() @czNiWU"4;
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int nFileLength = -1; +')\,m "z
try{ Sz4YPl
URL url = new URL(siteInfoBean.getSSiteURL()); )70-q yA
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); I]N?}]uZ
httpConnection.setRequestProperty("User-Agent","NetFox"); $ ;cZq
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int responseCode=httpConnection.getResponseCode(); l6ayV
if(responseCode>=400) NT?Gl(
{ PR?Ls{}p\
processErrorCode(responseCode); %rVC3}
return -2; //-2 represent access is error Up?w>ly
} d5&avL\
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String sHeader; +O
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for(int i=1;;i++) E
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{ /Zw^EM6c
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); j4H]HGHv
//Utility.log(in.readLine()); ]kUF>Wp
sHeader=httpConnection.getHeaderFieldKey(i); Yt79W
if(sHeader!=null) F9(*MP|
{ /bm$G"%d
if(sHeader.equals("Content-Length")) !4zSE,1
{ Dz$GPA
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); V+My]9ki
break; urmx})=
} M.|O+K z
} 71`)@y,Z,
else mX))*e4k
break; {xb8H
} dLl/V3C6t
} lA}(63j+b
catch(IOException e){e.printStackTrace ();} e]-bB#-A
catch(Exception e){e.printStackTrace ();} LAqmM3{fA
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Utility.log(nFileLength); x*GGO)r
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return nFileLength; ^hPREbD+f
} "&(.Z (
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//保存下载信息(文件指针位置) `j+aAxJ=\
private void write_nPos() Wt=QCutt
{ WK;X6`
try{ ?v8.3EE1\o
output = new DataOutputStream(new FileOutputStream(tmpFile)); $g? ]9}p
output.writeInt(nStartPos.length); :D(4HXHK%
for(int i=0;i<nStartPos.length;i++) W@<(WI3
{ e<wA["^
// output.writeLong(nPos); C-Y~T;53
output.writeLong(fileSplitterFetch.nStartPos); 4%#Y)zo.e
output.writeLong(fileSplitterFetch.nEndPos); V<&x+?>S
} x {Z_rD
output.close(); J`/ t;xk
} >*/\Pg6^
catch(IOException e){e.printStackTrace ();} Q;A1&UA2
catch(Exception e){e.printStackTrace ();} =+24jHs
} +>BLox6
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//读取保存的下载信息(文件指针位置) u0^Vy#@_
private void read_nPos() TC 7&IqT
{ c^ $_epc*
try{ B->3/dp2c'
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); )BI6nU
int nCount = input.readInt(); QN`K|,}H^
nStartPos = new long[nCount]; m~`d<RM/
nEndPos = new long[nCount]; rqJ'm?>cr
for(int i=0;i<nStartPos.length;i++) N]gJ(g
{ >2Z0XEe
nStartPos = input.readLong(); G Y? ?q8
nEndPos = input.readLong(); pW{Q%"W
} O |45r
input.close(); ?U+^ctwv7
} {C+blzh6
catch(IOException e){e.printStackTrace ();} Wtl/xA_
catch(Exception e){e.printStackTrace ();} Zj,1)ii
} 37C'knW
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