/* |?>h$'
**SiteFileFetch.java 7Tbk ti;
*/ vEsSqzc
package NetFox; 2R!W5gs1<
import java.io.*; }FXRp=s
import java.net.*; 3XRG"
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public class SiteFileFetch extends Thread { !=we7vK}
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SiteInfoBean siteInfoBean = null; //文件信息Bean DXt^Ym5Cv
long[] nStartPos; //开始位置 1<83MO;
long[] nEndPos; //结束位置 2XtQ"`)
FileSplitterFetch[] fileSplitterFetch; //子线程对象 eG v"&kr
long nFileLength; //文件长度 zN1;v6;
boolean bFirst = true; //是否第一次取文件 ,b4&$W].
boolean bStop = false; //停止标志 3Z0\I\E
File tmpFile; //文件下载的临时信息 [xPE?OD
DataOutputStream output; //输出到文件的输出流 A@ME7^w7
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) sn(}5;
public SiteFileFetch(SiteInfoBean bean) throws IOException `9-Zg??8r
{ J$;)TI
siteInfoBean = bean; }>w4!
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 4Z] 35*
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); C#Jj;Gd
if(tmpFile.exists ()) %vXQ Sz
{ K="+2]{I
bFirst = false; NS q=_8
read_nPos(); U ~m.I
} zMKL: Um"
else (a?Ip)`I
{ oB9m\o7$
nStartPos = new long[bean.getNSplitter()]; 0=B5
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nEndPos = new long[bean.getNSplitter()]; gISs+g
} ${wE5^ky
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public void run() OxZ:5ps
{ &UR/Txnu
//获得文件长度 U:r2hqegd
//分割文件 OT i3T1&
//实例FileSplitterFetch BP$#a
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//启动FileSplitterFetch线程 "+&<Q d2
//等待子线程返回 ;>N ~,Q
try{ z3]U%y(,
if(bFirst) 639k&"V
{ V{{x~Q9
nFileLength = getFileSize(); _3a
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if(nFileLength == -1) 3iw9jhK!W
{ j&.BbcE45
System.err.println("File Length is not known!"); 7krA+/Qr(
} d}_c(
else if(nFileLength == -2) 7w, FA
{ Ks(U]G"V
System.err.println("File is not access!"); U5"Oh I
} yxbTcZ
else ?W_U{=anl
{ @g~sgE}#
for(int i=0;i<nStartPos.length;i++) aehMLl9cl
{ OWsYE?
nStartPos = (long)(i*(nFileLength/nStartPos.length)); Kf#!IY][
} s jm79/
for(int i=0;i<nEndPos.length-1;i++) W+?[SnHL/
{ 9DX3]Z\7X
nEndPos = nStartPos[i+1]; S!_?# ^t
} ]?{lQ0vw'w
nEndPos[nEndPos.length-1] = nFileLength; AHJ;>"]
} /&7Yi_]r
} #LJ-IDuF!
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//启动子线程 vq1&8=
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ,np`:fBMy
for(int i=0;i<nStartPos.length;i++) ;0}2@Q2@ZK
{ mC92J@m/L!
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), PBtU4)
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), E e>j7k.G.
nStartPos,nEndPos,i); uW=NH;u
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "~C#DZwt{
fileSplitterFetch.start(); D5u"4\g<&
} #Ca's'j&f
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q%Q?q)x
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 3:lp"C51
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", nX%'o`f
nEndPos = " + nFileLength); EG4bFmcs
// fileSplitterFetch[nPos.length-1].start(); [t{#@X
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//等待子线程结束 r:4IKuTR
//int count = 0; E2'e}RQ
//是否结束while循环 Tj5@OcA$
boolean breakWhile = false; J5_Y\@
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while(!bStop) +t4m\/y
{ DAHf&/JK
write_nPos(); vqMk)htIz
Utility.sleep(500); 5KE%@,k k
breakWhile = true; M l?)Sc"\7
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for(int i=0;i<nStartPos.length;i++) L^1q/4${
{ z.&%>%TPP
if(!fileSplitterFetch.bDownOver) N09+id g
{ Mk/!,N<h#
breakWhile = false; h./vTNMc
break; )=nPM`Jn.
} !r
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} /(ju
if(breakWhile) +WN>9V0H
break; [.xk
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//count++; zy6(S_j
//if(count>4) a<jE25t
// siteStop(); |#:dC #
}
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System.err.println("文件下载结束!");
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} Cmx2/N
catch(Exception e){e.printStackTrace ();} F%Umau*1
} p6Dv;@)Yn
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//获得文件长度 m:fouMS
public long getFileSize() 124L3AG
{ ivz9R'
int nFileLength = -1; {-N90Oe
try{ pkf OM"5'
URL url = new URL(siteInfoBean.getSSiteURL()); A2:){`Mw
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); .4re0:V
httpConnection.setRequestProperty("User-Agent","NetFox");
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int responseCode=httpConnection.getResponseCode(); W$Q)aA7
if(responseCode>=400) ,9tbu!Pvq
{ %_R|@cyD
processErrorCode(responseCode); ^Xy$is3
return -2; //-2 represent access is error <C"N X
} ,x"yZ
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String sHeader; l3?,gd.-
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for(int i=1;;i++) &Dg)"Xji
{ u4,X.3V]A
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); b}&7~4zw
//Utility.log(in.readLine()); + }XL>=-5
sHeader=httpConnection.getHeaderFieldKey(i); ciGpluQF
if(sHeader!=null) N!Wq}#&l
{ N'
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if(sHeader.equals("Content-Length")) Z++Z@J "
{ 5*wApu{2A
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); h9BD
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break; a;'E}b{`F
} x #X#V\w=
} A6UdWK
else a}qse5Fr
break; M`+e'vdw
} k CW!m
} gUH'DS]{
catch(IOException e){e.printStackTrace ();} RnA&-\|*
catch(Exception e){e.printStackTrace ();} Bw]L2=d
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Utility.log(nFileLength); 5
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return nFileLength; $dZ>bXUw:
} 5} MlZp
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//保存下载信息(文件指针位置) q?Ku}eID3
private void write_nPos() UC+7-y,
{ `mKlv~$1^
try{ > 0Twr
output = new DataOutputStream(new FileOutputStream(tmpFile)); BsK|:MM]
output.writeInt(nStartPos.length); aFr!PQp4{
for(int i=0;i<nStartPos.length;i++) k99gjL`
{ b1+hr(kMRM
// output.writeLong(nPos); 9oje`Ay
output.writeLong(fileSplitterFetch.nStartPos); A
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output.writeLong(fileSplitterFetch.nEndPos); Cb
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} hVipr hC
output.close(); =|gJb|?w
} s
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catch(IOException e){e.printStackTrace ();} ])QO%
catch(Exception e){e.printStackTrace ();} jV4hxuc$
} VM!-I8t
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//读取保存的下载信息(文件指针位置) ~.W=
private void read_nPos() ,a9D~i 9R
{ *dG}R#9Nv
try{ FYXw$7'l
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); T\2) $
int nCount = input.readInt(); +24|_Lx0
nStartPos = new long[nCount]; 3b|7[7}&
nEndPos = new long[nCount]; o%Uu.P
for(int i=0;i<nStartPos.length;i++) >
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{ N
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nStartPos = input.readLong(); O>SuZ>g+7
nEndPos = input.readLong(); k(-Z@
} CQBT::
input.close(); C7b
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} 95$pG/o
catch(IOException e){e.printStackTrace ();} 6^]`-4*W
catch(Exception e){e.printStackTrace ();} @Xq&t}*8
} "M9TB. O
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private void processErrorCode(int nErrorCode) YeRcf`
{ }>{ L#JW
System.err.println("Error Code : " + nErrorCode); om".j
} ` $.X [\*U
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//停止文件下载 } g3HoFC
public void siteStop() QmH/yy3.%
{ qE#&)
bStop = true; qPXANx<^
for(int i=0;i<nStartPos.length;i++) zdLVxL>87
fileSplitterFetch.splitterStop(); I;kf
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} 00`bL
} kZU"Xn
//负责部分文件的抓取 B^i mG
**FileSplitterFetch.java YW8K
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*/ W>p\O9BG
package NetFox; 5E]UI YAkV
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import java.io.*; NK+FQ^m[
import java.net.*; '^Pq(b~
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public class FileSplitterFetch extends Thread { pG,<_N@P
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String sURL; //File URL K,x$c %
long nStartPos; //File Snippet Start Position tr}KPdE
long nEndPos; //File Snippet End Position K[Yc<Q
int nThreadID; //Thread's ID z3^RUoGU
boolean bDownOver = false; //Downing is over 7XUhJN3n
boolean bStop = false; //Stop identical VFilF<