/* $=Ns7Sbup
**SiteFileFetch.java $+f=l~/s
*/ "OA{[)fw"
package NetFox; !zm;C@}ln
import java.io.*; x@QNMK.7
import java.net.*; 'e*w8h
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public class SiteFileFetch extends Thread { ~ +>ehU
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SiteInfoBean siteInfoBean = null; //文件信息Bean Ue60Mf
long[] nStartPos; //开始位置 ;2\6U;
long[] nEndPos; //结束位置 W8$0y2
FileSplitterFetch[] fileSplitterFetch; //子线程对象 "/RMIS
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long nFileLength; //文件长度 ~bm'i%$k
boolean bFirst = true; //是否第一次取文件 TTFs|T6`q
boolean bStop = false; //停止标志 ,~&HL7v
File tmpFile; //文件下载的临时信息 W1M322]>L
DataOutputStream output; //输出到文件的输出流 i7 21(1
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) N6of$p'N
public SiteFileFetch(SiteInfoBean bean) throws IOException T)OR HJ&,
{ xpO;V}M|
siteInfoBean = bean; [FrLxU
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); czU"
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); V2`Ud[
if(tmpFile.exists ()) Dw7Xy}I/
{ qB,0(I1-!
bFirst = false; v*qbzW`
read_nPos(); 'Etq;^H
} ?>7-a~*A@
else +0z7}u\x
{ e3W~6P
nStartPos = new long[bean.getNSplitter()]; &Jb\}c}
nEndPos = new long[bean.getNSplitter()]; dr}PjwW%
} =EMB~i
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} {QylNC9
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public void run() !OY}`a(z
{ tE{M
//获得文件长度 ni%)a
//分割文件 d6'G
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//实例FileSplitterFetch pvUV5^B(M
//启动FileSplitterFetch线程 %b<W]HwA
//等待子线程返回 _p%n%Oce
try{ pvsa?z;rP
if(bFirst) M*ZN]9{^.
{ ;aWk-
nFileLength = getFileSize(); r
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if(nFileLength == -1) (g/A uL
{ 5|*`} ;/y
System.err.println("File Length is not known!"); N'9T*&o+
} z8awND
else if(nFileLength == -2) ;*<R~HJt
{ uOeal^uS
System.err.println("File is not access!"); p> >H$t
} tkcs6uy
else -qDqJ62mC
{ znTi_S
for(int i=0;i<nStartPos.length;i++) -u'"l(n)~
{ 2;WbXc!#!
nStartPos = (long)(i*(nFileLength/nStartPos.length)); rG6G~|mS
} irD5;xk([
for(int i=0;i<nEndPos.length-1;i++) K _YOp1
{ [. 9[?8
nEndPos = nStartPos[i+1]; ?..BA&zRk
} o}114X4q;
nEndPos[nEndPos.length-1] = nFileLength; Z;81"
} &`v?oN9$
} UAhWJ$(C
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//启动子线程 F[Mwd &P@
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; fxPg"R!1i
for(int i=0;i<nStartPos.length;i++) 2{63:f1c`'
{ 0jlM~ H
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), n.2:fk
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 8I/3T
nStartPos,nEndPos,i); +71<B>L
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qc
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fileSplitterFetch.start(); ./k7""4
} wCNn/%C
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), I
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); *YeQCt-l
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", jBYvOy*$Q
nEndPos = " + nFileLength); S\8v)|Pr
// fileSplitterFetch[nPos.length-1].start(); eN,9N]K
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//等待子线程结束 ?#=xx.cF
//int count = 0; . waw=C
//是否结束while循环 'Tjvq%ks
boolean breakWhile = false; "nu]3zcd
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while(!bStop) zvdut ,6<
{ [m0X kvd
write_nPos(); 3<
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Utility.sleep(500); >bf.T7wy
breakWhile = true; U _5`
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for(int i=0;i<nStartPos.length;i++) lxL.ztL
{ ^%9oeT{
if(!fileSplitterFetch.bDownOver) ?QT6q]|d0+
{ w/m@(EBK
breakWhile = false; '?veMX
break; N:| :L:<1
} ~ h3G}EH
} ?<!qF:r:
if(breakWhile) Uw.')ZY=
break; Z5 IWoY
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//count++; y ;[~(Yg[
//if(count>4) js81@WX!c
// siteStop(); H
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} 3tTOs
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System.err.println("文件下载结束!"); 05FGfnq.8
} S"h;u=5it
catch(Exception e){e.printStackTrace ();} r$={_M$
} bLai@mL&a
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//获得文件长度 ?^%[*OCCC!
public long getFileSize() "frZ%mv
{ x'`{#bKD
int nFileLength = -1; gE2(E0H
try{ cWkg.ri-x
URL url = new URL(siteInfoBean.getSSiteURL()); 1WMZ$vsQUb
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); jDY
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httpConnection.setRequestProperty("User-Agent","NetFox"); fAULuF
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int responseCode=httpConnection.getResponseCode(); F5Xb_&
if(responseCode>=400) TI7$J#
{ )_jboaNzwI
processErrorCode(responseCode); _:m70%i
return -2; //-2 represent access is error FQ<x(&/NF
} Vpnk>GWD
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String sHeader; ZR}v_]l^
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for(int i=1;;i++) '\#q7YjaL
{
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); gLv+L]BnhH
//Utility.log(in.readLine()); |KYl'"5\
sHeader=httpConnection.getHeaderFieldKey(i); kzZgNv#G;
if(sHeader!=null) :.+w'SEn4M
{ {:gx*4}q8
if(sHeader.equals("Content-Length")) HqWWWCWal
{ #AGO~#aK
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); S!8<|WO^t
break; uBbQJvL
} 4P3RRS
} Pw<?Dw]m
else h.vy SwF"j
break; uy<3B>3~.
} utZI'5i
} ;-u]@35
catch(IOException e){e.printStackTrace ();} Mgw#4LU
catch(Exception e){e.printStackTrace ();} 89&9VX^A
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Utility.log(nFileLength); ;O hQBAC
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return nFileLength; M
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} %HG+|)b
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//保存下载信息(文件指针位置) E D>7
private void write_nPos() 5<(*
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{ o!BCR:
try{ &s`)_P[
output = new DataOutputStream(new FileOutputStream(tmpFile)); bPFGQlmIO
output.writeInt(nStartPos.length); R@3HlGuRKw
for(int i=0;i<nStartPos.length;i++) Y5GN7.
{ @o0HDS
// output.writeLong(nPos); ejV`W7U
output.writeLong(fileSplitterFetch.nStartPos); YdCl
output.writeLong(fileSplitterFetch.nEndPos);
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} j-1V,V=
output.close(); ~%*l>GkP*
} R1LirZlzJ
catch(IOException e){e.printStackTrace ();} y ~
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catch(Exception e){e.printStackTrace ();} `C>h]H(
} #!Cg$6%x9
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//读取保存的下载信息(文件指针位置) RDbNC v#
private void read_nPos() Wmd@%K
{ nr]=O`Mvh
try{ h/\v+xiF
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); y05!-G:Y\
int nCount = input.readInt(); %_Vz0
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nStartPos = new long[nCount]; HAO-|=c4
nEndPos = new long[nCount]; [s^pP2
for(int i=0;i<nStartPos.length;i++) /1LN\Eu
{ ]&]G
nStartPos = input.readLong(); 961&rR}d
nEndPos = input.readLong(); zRjbEL
} {1)b LG|$
input.close(); VDnrm*
} ,.P]5 lE
catch(IOException e){e.printStackTrace ();} ?/&X_O
catch(Exception e){e.printStackTrace ();} 8
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} 1^$hbRq
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private void processErrorCode(int nErrorCode) EN`JzLjP
{ 28^/By:J
System.err.println("Error Code : " + nErrorCode); G%~V b
} |gA@$1+}
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//停止文件下载 esSj
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public void siteStop() mfZbo#KS#v
{ |iJz[%
bStop = true; (Yj6|`
for(int i=0;i<nStartPos.length;i++) Q)aoc.f!v
fileSplitterFetch.splitterStop(); ;0WAfu}#H
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} ^r}Uu~A>
} ek)rsxf1A
//负责部分文件的抓取 TSFrv8L
**FileSplitterFetch.java Z|@-=S(.
*/ lJAzG,f
package NetFox; kVtP~
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import java.io.*; ~*EipxhstJ
import java.net.*; a)2l9
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public class FileSplitterFetch extends Thread { 6T4"m
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;
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String sURL; //File URL 9*iVv)jd
long nStartPos; //File Snippet Start Position K_U`T;Z\
long nEndPos; //File Snippet End Position .nIGs'P
int nThreadID; //Thread's ID Q']'KU.
boolean bDownOver = false; //Downing is over 27gHgz}}
boolean bStop = false; //Stop identical 0*:n<T9
FileAccessI fileAccessI = null; //File Access interface h(q4
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException D`n<!"xg@$
{ d3E N0e+^
this.sURL = sURL; oa+'.b~
this.nStartPos = nStart; dh]Hf,OLF
this.nEndPos = nEnd; KUX6n(u
nThreadID = id; L~+aD2E {
fileAccessI = new FileAccessI(sName,nStartPos);//定位 %zc.b
} G{.=27
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public void run() r8R7@S2V'
{ n)cc\JPQ
while(nStartPos < nEndPos && !bStop) 71Q`B#t0'Z
{ b^[>\s'
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try{ )`k+Oyvi<
URL url = new URL(sURL); >.39OQ#
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); e{2Za
httpConnection.setRequestProperty("User-Agent","NetFox"); 0F!Uai1
String sProperty = "bytes="+nStartPos+"-"; o r ~@!
httpConnection.setRequestProperty("RANGE",sProperty); 7g8\q@',
Utility.log(sProperty); im>/$!&OyI
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InputStream input = httpConnection.getInputStream(); x?6^EB|@
//logResponseHead(httpConnection); !K_<7iExI\
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byte[] b = new byte[1024]; ]mJ9CP8P1c
int nRead; 5-a^Frmg#"
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) mMZ=9 ?m
{ f3,Xb
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nStartPos += fileAccessI.write(b,0,nRead); k"dE?v\cG
//if(nThreadID == 1) iw(`7(*
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 4u p7:?
} V'.gE6we
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Utility.log("Thread " + nThreadID + " is over!"); %,N-M]Jf
bDownOver = true; 9[E/^
//nPos = fileAccessI.write (b,0,nRead); WFug-#;e
} <6N3()A)%1
catch(Exception e){e.printStackTrace ();} Q\~#cLJ/
} ieEtC,U
} ENYc.$r
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//打印回应的头信息 6(Cjak+~!
public void logResponseHead(HttpURLConnection con) fb8xs<
{ kyB>]2
for(int i=1;;i++) T/L\|_:'
{ ^y&2N
String header=con.getHeaderFieldKey(i); kYS\TMt,C
if(header!=null) m&*0<N
//responseHeaders.put(header,httpConnection.getHeaderField(header)); UBwYwm0
Utility.log(header+" : "+con.getHeaderField(header)); BhyLcUBuB
else PwAmnk !
break; a<pEVV\NB~
} A[88IMZs
} GO#eI]>/r
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public void splitterStop() iQh:y:Jo1&
{ p{V(! v|
bStop = true; sYTToanA$?
} 78mJ3/?rC
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} 3v~}hV/RUy
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/* Fw#wVs)@:
**FileAccess.java xNVSWi,
*//文件访问(定位,写) ]%5gPfv[T
package NetFox; 2Q/V D,yU
import java.io.*; ciPaCrV
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public class FileAccessI implements Serializable{ >&qaT*_g
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 :rmi8!o
RandomAccessFile oSavedFile; _ZuI x=!
long nPos; zy9W{{:P(1
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public FileAccessI() throws IOException na/,1iI<
{ 7
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this("",0); n22OPvp
} jAFJ?L(
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public FileAccessI(String sName,long nPos) throws IOException H%Sx*|
{ Gc!&I+kd
oSavedFile = new RandomAccessFile(sName,"rw"); '^t(=02J
this.nPos = nPos; 2f0_Xw_V_
oSavedFile.seek(nPos); | i'w"Tz4
} Ef6LBNWY.
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public synchronized int write(byte[] b,int nStart,int nLen) %aJ8wYj*
{ LTio^uH
int n = -1; y=WCR*N
try{ p["20?^
oSavedFile.write(b,nStart,nLen); 7!,
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n = nLen; $5yH8JU
} D|5Fo'O^AV
catch(IOException e) O$&4{h`
{ k{C|{m
e.printStackTrace (); v/C*?/ ~
} ^$\#aTyFK
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return n; R 9Yk9v
} q/\Hh9`
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} 6?jSe<4x
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/* T_?,?
**SiteInfoBean.java ;!N_8{
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*/ q"^T}d d,
package NetFox; V}"w8i+D?
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public class SiteInfoBean { *Ry
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private String sSiteURL; //Site's URL 3MFb\s&Fq
private String sFilePath; //Saved File's Path SQVyCxcX_
private String sFileName; //Saved File's Name r*s)T`T}}
private int nSplitter; //Count of Splited Downloading File |h1Y3
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public SiteInfoBean() i/WiSwh:
{//nSplitter的缺省值为5 8Ow0A
//default value of nSplitter is 5 GGwHz]1L
this("","","",5); be{t yV
} < {dV=
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ns1@=f cO
{ n*fsdo~
sSiteURL= sURL; ,;wc$-Z!8
sFilePath = sPath; f)K1j{TZ
sFileName = sName; 8a4&}^|
this.nSplitter = nSpiltter; E#cZM>
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} B&