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**SiteFileFetch.java "4QD\k5
*/ Bnd Y\
package NetFox; $olITe"$g
import java.io.*; XV<{tqa
import java.net.*; .t%`"C
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public class SiteFileFetch extends Thread { N07FU\<9
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SiteInfoBean siteInfoBean = null; //文件信息Bean + gP 4MP
long[] nStartPos; //开始位置 [/eRc
long[] nEndPos; //结束位置 mr#XN&e
FileSplitterFetch[] fileSplitterFetch; //子线程对象 _dw6 C2]P
long nFileLength; //文件长度 ( |Xc_nC
boolean bFirst = true; //是否第一次取文件 vM/D7YS:
boolean bStop = false; //停止标志 %VzCeS9
File tmpFile; //文件下载的临时信息 ^sZ,(sc{G
DataOutputStream output; //输出到文件的输出流 ]`n6H[6O
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) .Vb\f
public SiteFileFetch(SiteInfoBean bean) throws IOException 2sqNTuO6,|
{ Ru^j~Cj5
siteInfoBean = bean; Z^vcODeC$
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); dpcFS0
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); VZ$FTM^b8
if(tmpFile.exists ()) `Ot;KDz
{ #Q_
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bFirst = false; E6y ?DXWH
read_nPos(); UZRCJ
} R4g% $}
else g_t1(g*s
{ #1` lJ
nStartPos = new long[bean.getNSplitter()]; 92K#xM/
nEndPos = new long[bean.getNSplitter()]; sa>}wz<o
} i\u m;\
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} /MQI5Djg
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public void run() ZI'Mr:z4
{ j?rq%rQd
//获得文件长度 ^l"
//分割文件 ir*T,O
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//实例FileSplitterFetch 8 m
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//启动FileSplitterFetch线程 v"dj%75O?e
//等待子线程返回 89{@ 2TXR
try{ g` QbJ61a
if(bFirst) #=B~}
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{ /_G^d1T1?L
nFileLength = getFileSize(); hhVyz{u
if(nFileLength == -1) tv1Z%Mx?Cp
{ 5U^
System.err.println("File Length is not known!"); ")87GQ( R
} Q]}aZ4L
else if(nFileLength == -2) 7 Ed6o
{ -K K)}I`
System.err.println("File is not access!"); :b_R1ZV|
} _jW}p-j
else \D37l_
{ DxLN{g]B
for(int i=0;i<nStartPos.length;i++) ITu6m<V
{ _XqD3?yH4
nStartPos = (long)(i*(nFileLength/nStartPos.length)); bQ"w%!
} g0!{CW
for(int i=0;i<nEndPos.length-1;i++) 'v"{frh
{ /J"U`/
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nEndPos = nStartPos[i+1]; J c~{ E
} }I\hOL
nEndPos[nEndPos.length-1] = nFileLength; q!
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} mGmkeD'
} J \@yP
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//启动子线程 b'N(eka
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; K)AJx"
for(int i=0;i<nStartPos.length;i++) 'o#ve72z1
{ #*[G,s#t^
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), tp,e:4\8Q
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), _[,oP s:+
nStartPos,nEndPos,i); 8yH*
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8tM40/U$
fileSplitterFetch.start(); ;MqH)M
} ",\,lqV
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), fBptjt_
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); XujVOf
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ~
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nEndPos = " + nFileLength); k{op ,n#
// fileSplitterFetch[nPos.length-1].start(); `2X#;{a:
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//等待子线程结束 =U6%Wdth
//int count = 0; g9fS|T
//是否结束while循环 $ePBw~yu
boolean breakWhile = false; G &'eP
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while(!bStop) K0#kW \4`
{ @iZ"I i&+
write_nPos(); 0ivlKe%
Utility.sleep(500); BTXS+mvl
breakWhile = true; ?qeBgkL(B^
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for(int i=0;i<nStartPos.length;i++) P&@:''
{ tdTD!'
if(!fileSplitterFetch.bDownOver) ;* vVucx
{ -uDB#?q:W
breakWhile = false; a}Db9 =
break; }E 5oa\1u
} SCClD6k=V
} gWo `i
if(breakWhile) _`>F>aP
break; Th&*
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//count++; LFsrqdzJ
//if(count>4) 6~KtT{MYQ
// siteStop(); c?qg
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} fUh7PF%
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System.err.println("文件下载结束!"); *x EcX6ZHX
} ;\@co5.=
catch(Exception e){e.printStackTrace ();} m_Owe/BC#m
} HH>"J/;c,
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//获得文件长度 Y}_J@&:
public long getFileSize() EG<YxNX,
{ :` >|N|i
int nFileLength = -1; [|gh q
try{ Ys@M1o
URL url = new URL(siteInfoBean.getSSiteURL()); 0n25{N
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
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httpConnection.setRequestProperty("User-Agent","NetFox"); cd8~y
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int responseCode=httpConnection.getResponseCode(); *B7+rd
if(responseCode>=400) KX e/i~AS
{ .\kcWeC\
processErrorCode(responseCode); 8}m bfuo1
return -2; //-2 represent access is error 49%qBO$R
} t?NB#/#%x
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String sHeader; HC0q_%j
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for(int i=1;;i++) Si,[7um
{ OR[6pr@
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); N&`VMEB)k
//Utility.log(in.readLine()); @5n!t1(
sHeader=httpConnection.getHeaderFieldKey(i); lv_|ws
if(sHeader!=null) ,?Pn-aC+
{ %T]NM3|U
if(sHeader.equals("Content-Length")) Ekx3GM_]
{ )clSW
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); bWzv7#dd=
break; FLI\SF<
} 7cx~?xk <m
} |zD{]y?S-
else -%]O-'
break; 8'Dp3x^W>
} 0HUSN_3F
}
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catch(IOException e){e.printStackTrace ();} 2j_YHv$I
catch(Exception e){e.printStackTrace ();} [%(}e1T(
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Utility.log(nFileLength); +TW9BU'a^
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return nFileLength; Ju3-ZFUS4
} Bq~!_6fB
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//保存下载信息(文件指针位置) 7.fpGzUM
private void write_nPos() *<k8H5z8]
{ .'o<.\R8
try{ 70NQ9*AAy
output = new DataOutputStream(new FileOutputStream(tmpFile)); T'9I&h%\
output.writeInt(nStartPos.length); <ijf':X=*
for(int i=0;i<nStartPos.length;i++) `n%uvo}UT
{ `]^0lD=eI
// output.writeLong(nPos); [:gPp)f,
output.writeLong(fileSplitterFetch.nStartPos); Qs2E>C
output.writeLong(fileSplitterFetch.nEndPos); ,bT|:T@ny
} 7%?2>t3~
output.close(); Wz)O,X^
} VXt8y)?a
catch(IOException e){e.printStackTrace ();} 9"mOjL
catch(Exception e){e.printStackTrace ();} C"bG?Mb
} )1Rn;(j9Re
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//读取保存的下载信息(文件指针位置) IC&xL9
private void read_nPos() / fBi9=}+
{ Oo'IeXQ9(
try{ tpe:]T/xh
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); utIR\e#:B
int nCount = input.readInt(); Cz=HxU80J
nStartPos = new long[nCount]; _@I8B
nEndPos = new long[nCount]; C/Vs+aW
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for(int i=0;i<nStartPos.length;i++) XWH{+c"
{ 06@^knm
nStartPos = input.readLong(); noY~fq/U
nEndPos = input.readLong(); _ndc^OG
} e?W-vi%
input.close(); eELJDSd
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} H/8H`9S$
catch(IOException e){e.printStackTrace ();} Jt79M(Hp!
catch(Exception e){e.printStackTrace ();} \lj.vzD-A
} '6l4MR$j&m
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private void processErrorCode(int nErrorCode) 3WdYDv]N}L
{ t)|*-=
System.err.println("Error Code : " + nErrorCode); , &>LBdG`
} @<]sW*s
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//停止文件下载 AF ,*bb
public void siteStop() sT.;*3{
{ (,Zy2wr=
bStop = true; 4DhGp
for(int i=0;i<nStartPos.length;i++) N ] KS\
fileSplitterFetch.splitterStop(); /Y=Cg%+
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} ;Du+C%
} p,_,o3@~
//负责部分文件的抓取 WZz8VF
**FileSplitterFetch.java USF9sF0l
*/ [
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package NetFox; ~s.~X5
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