/* uP4yJ/]
**SiteFileFetch.java Pjq'c+4.yL
*/ LcLHX
package NetFox; N+~
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import java.io.*; [(
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import java.net.*; \=({T_j4
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public class SiteFileFetch extends Thread { -sHX
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SiteInfoBean siteInfoBean = null; //文件信息Bean ?uCL[
long[] nStartPos; //开始位置 fFEB#l!oUb
long[] nEndPos; //结束位置 &CRgi488b
FileSplitterFetch[] fileSplitterFetch; //子线程对象 o0AT&<K
long nFileLength; //文件长度 bV:<%l]
boolean bFirst = true; //是否第一次取文件 ="G2I\
boolean bStop = false; //停止标志 'xd8rN%T
File tmpFile; //文件下载的临时信息 FVNTE+LW
DataOutputStream output; //输出到文件的输出流 S/Ic=
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) v2gk1a&
public SiteFileFetch(SiteInfoBean bean) throws IOException !4v>|t q!
{ .{eMN[ n@
siteInfoBean = bean; ]@y%j'e
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 3L2NenJB
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); r5[pT(XT]
if(tmpFile.exists ()) L5UZ@R,
{ !Th5x2
bFirst = false; bOU"s>?
read_nPos(); Sa)sDf1+`
} aid1eF
else ,J 2qLH1
{ NPv.7,
nStartPos = new long[bean.getNSplitter()]; w\[l4|g`
nEndPos = new long[bean.getNSplitter()]; x+~!M:fAc9
} P,zQl;
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public void run() NxA4*_|H9
{ 6wT ])84
//获得文件长度 %J'/ cmR&
//分割文件 ;k0Jl0[}
//实例FileSplitterFetch .dYv.[?hL
//启动FileSplitterFetch线程 zT}vaU6
//等待子线程返回 h#Rza-?"\
try{ hrJ(] [8
if(bFirst) G8'{nPA~
{ t<c7%i#Od
nFileLength = getFileSize(); ObZhQ.&
if(nFileLength == -1) RFsUb:%V7-
{ q'trd};xR
System.err.println("File Length is not known!"); L!Tvz(_7f6
} 8wO4;
else if(nFileLength == -2) vr"Pr4z4i
{ k:7Gb7\
System.err.println("File is not access!"); a:GM|X
} ic}TiTK
else o6w8Y/VPu
{ zrSYLG
for(int i=0;i<nStartPos.length;i++) CN` ~DD{
{ 22ySMtxn
nStartPos = (long)(i*(nFileLength/nStartPos.length)); PI$i_3N
} 9%21Q>Y?b
for(int i=0;i<nEndPos.length-1;i++) g :B4zlKG
{ )^P54_2
nEndPos = nStartPos[i+1]; 2oc18#iG(
} jLn#%Ia}
nEndPos[nEndPos.length-1] = nFileLength; AMB{Fssz
} sWse
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} z80(+`
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//启动子线程 7MZH'nO
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ,j{tGj_
for(int i=0;i<nStartPos.length;i++) EF$ASNh"
{ UsA fZg8
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), E ,ilJl\
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 5|jY
nStartPos,nEndPos,i); a0k;way
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]Hl{(v\HO
fileSplitterFetch.start(); :B=Gb8?
} &:ZR% f
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); S W6oaa81
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", K 0o F=|
nEndPos = " + nFileLength); xR$T/] /
// fileSplitterFetch[nPos.length-1].start(); f`;w@gR`=
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//等待子线程结束 x'?p?u~[
//int count = 0; SAitufS
//是否结束while循环 "~.4z,ha
boolean breakWhile = false; Yh^8
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while(!bStop) 0=U|7%dOL
{ $8(QBZq
write_nPos(); a_0I)'
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Utility.sleep(500); )l!
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breakWhile = true; u^MRKLn
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for(int i=0;i<nStartPos.length;i++) m rsmul{
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if(!fileSplitterFetch.bDownOver) pl[@U<8aw
{ XUVj<U
breakWhile = false; 31 <0Nw;l
break; S"?fa)~
} N<b2xT
} IUEpE9_
if(breakWhile) L58#ri=
break; lw~
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//count++; \6MM7x(U3
//if(count>4) 4sORp^t'Q
// siteStop();
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} k18v{)i~
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System.err.println("文件下载结束!"); o
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} <[
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catch(Exception e){e.printStackTrace ();} ZI1]B944ni
} #C.
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//获得文件长度 xk/-TXB
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public long getFileSize() {irc~||4
{ &b^~0Z
int nFileLength = -1; gjz-CY.hz
try{ _()1"5{
URL url = new URL(siteInfoBean.getSSiteURL()); n6t@ e^
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ?ZGsh7<k
httpConnection.setRequestProperty("User-Agent","NetFox"); U$OI]Dd9
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int responseCode=httpConnection.getResponseCode(); z7sDaZL?_
if(responseCode>=400) z k}AGw
{ >EFWevT{
processErrorCode(responseCode); p[xGL }
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return -2; //-2 represent access is error yZ[g2*1L
} N>*+Wg$Ne
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String sHeader; U+>M@!=
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for(int i=1;;i++) z7AWWr=H
{ 8TAJ#Lm
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); <B0f
//Utility.log(in.readLine()); Xj{fM\,"9
sHeader=httpConnection.getHeaderFieldKey(i); M!i|,S
if(sHeader!=null) \5! 7zPc
{ B K=w'1U
if(sHeader.equals("Content-Length")) ToPjBvD
{ RzL(Gnb
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); |BZrV3;H
break; =+wd"Bu
} jZkc
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} NNbdP;=:u
else %aw.o*@:
break; gELG/6l
} kD;pj3o&"2
} ^Z;zA@[wt
catch(IOException e){e.printStackTrace ();} AnX<\7bc}
catch(Exception e){e.printStackTrace ();} ZfqN4
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Utility.log(nFileLength); /u.ZvY3,
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return nFileLength; ]7K2S{/o{
} 7`A]X,:
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//保存下载信息(文件指针位置) YcDKRyrt
private void write_nPos() }kr?+)wB
{ ;XawEG7" U
try{ T#3@r0M
output = new DataOutputStream(new FileOutputStream(tmpFile)); 0&]1s
output.writeInt(nStartPos.length); :(X3?%
for(int i=0;i<nStartPos.length;i++) "EMW'>&m