/* J| &aqY
**SiteFileFetch.java AX{<d@z`j
*/ %2D'NZS
package NetFox; rr`_\ut
import java.io.*; >clVV6B
import java.net.*; wsrdBxd5
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public class SiteFileFetch extends Thread { R=Lkf
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SiteInfoBean siteInfoBean = null; //文件信息Bean .
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long[] nStartPos; //开始位置 J:uFQWxZ
long[] nEndPos; //结束位置 )N^fSenFBn
FileSplitterFetch[] fileSplitterFetch; //子线程对象 c{D<+XM
long nFileLength; //文件长度 ^|h_[>
boolean bFirst = true; //是否第一次取文件 2.);OFk+
boolean bStop = false; //停止标志 7?k3jDK
File tmpFile; //文件下载的临时信息 MTE1\,
DataOutputStream output; //输出到文件的输出流 1=+S'_j
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) D?Ol)aj?
public SiteFileFetch(SiteInfoBean bean) throws IOException ?T%"Jgy8
{ @fo(#i&
siteInfoBean = bean; `3[W~Cq
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); py~[M'p(H
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); {be|G^.c
if(tmpFile.exists ()) A`vRUl,c=
{ :SN? t
bFirst = false; mg70%=qM0f
read_nPos(); j4@6`[n:
} |iSwG=&
else 2XBHo (
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nStartPos = new long[bean.getNSplitter()]; \C;Yn6PK0
nEndPos = new long[bean.getNSplitter()]; .aWwJZ=[
} 9(=+OQ6
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} Wkb>JnPo
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public void run() AxJqLSfyb,
{ +('xzW
//获得文件长度 Xsb.xxK.
//分割文件 s;Z i
//实例FileSplitterFetch 56C'<#
//启动FileSplitterFetch线程 _8`S&[E?
//等待子线程返回 &kWT<*;J)
try{ M9VAs~&S
if(bFirst) FDBNKQV
{ Q-s5-&h(
nFileLength = getFileSize(); h>xB"E|.
if(nFileLength == -1) k+@ :+RL
{ g:c?%J
System.err.println("File Length is not known!"); S>HfyZ&Pc
} }{J>kgr6
else if(nFileLength == -2) 4yMi9Ri4H
{ 5``usn/&Kj
System.err.println("File is not access!"); vsA/iH.
} 5D^2
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else d"ZsOq10D
{ 4ee-tKH
for(int i=0;i<nStartPos.length;i++) 0Iyb}
{ f0g_Gn $
nStartPos = (long)(i*(nFileLength/nStartPos.length)); <[gN4x>'
} DvI^3 iG8
for(int i=0;i<nEndPos.length-1;i++) <Z1m9O "sy
{ - t4F
nEndPos = nStartPos[i+1]; 6I]{cm
} }ew)QHd
nEndPos[nEndPos.length-1] = nFileLength; @O6
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} _!vuDv%
} 9j;!4AJ1t
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//启动子线程 qvh8~[
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; #x6wM~
for(int i=0;i<nStartPos.length;i++) |D;I>O^"R
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fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Oeg^%Y
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), W$D:mw7
nStartPos,nEndPos,i); ZS&+<kGD
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); .q 4FGPWz
fileSplitterFetch.start(); (G>g0(;D-
} j->5%y
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (r.y
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); -ebyW#
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", O+DYh=m*p
nEndPos = " + nFileLength); T!&VT;
// fileSplitterFetch[nPos.length-1].start(); PC,I"l
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//等待子线程结束 >T14
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//int count = 0;
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//是否结束while循环 '2p,0Bk9i
boolean breakWhile = false; p{0rHu[
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while(!bStop) 6D4u?P,
{ -OgC. 6
write_nPos(); ?O#"x{Pk
Utility.sleep(500); &x4|!"G
breakWhile = true; 9PR?'X;4
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for(int i=0;i<nStartPos.length;i++) %x^ U3"7
{ *M~BN}.
if(!fileSplitterFetch.bDownOver) \VAS<?3
{ 2;SiH]HNS
breakWhile = false; @7?L+.r$9
break; nG|
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} %F0.TR!!n
} ge&!GO
if(breakWhile) 7x$VH5jie#
break; Fy^8]u*Fu
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//count++; lxLEYDGFS
//if(count>4) R{Me~L?
// siteStop(); +=L^h9F
} <)oW
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System.err.println("文件下载结束!"); [@$t35t~
} 7t%
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catch(Exception e){e.printStackTrace ();} Ch&2{ng
} ?ieC>cr
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//获得文件长度 $r(9'm}W
public long getFileSize() ~Y7:08
{ J}VG4}L
int nFileLength = -1; ]n4G]ybK%
try{ u5P2*
URL url = new URL(siteInfoBean.getSSiteURL()); f5t/=/6>F
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); j@jUuYuDgl
httpConnection.setRequestProperty("User-Agent","NetFox"); 0SDyE
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int responseCode=httpConnection.getResponseCode(); T^nOv2@,
if(responseCode>=400) S),acc(d
{ JHsxaX;c
processErrorCode(responseCode); zW ; sr.
return -2; //-2 represent access is error pJ@D}2u(
} '!XVz$C
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String sHeader; ff2`4_,|
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for(int i=1;;i++) !X<dN..
{ ?Lquf&`vP
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); PCiwQ4~
//Utility.log(in.readLine()); 4Mv] z^
sHeader=httpConnection.getHeaderFieldKey(i); \
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if(sHeader!=null) rIAbr5CG
{ qL!pDZk
if(sHeader.equals("Content-Length")) /,^AG2]( f
{ k :`yxxYIh
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); /baSAoh/e
break; 67P@YL
} /G!M\teeF
} 39Tlt~Psz
else B5/"2i
break; j:'8yFi_
} 43BqNQ0
} t$ 3/ZTx
catch(IOException e){e.printStackTrace ();} GNI:k{H@"?
catch(Exception e){e.printStackTrace ();}
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Utility.log(nFileLength); h9l 6AnbJ
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return nFileLength; o Yrg;]H
} ze#r/j;sw
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//保存下载信息(文件指针位置) 7) Qq
private void write_nPos() Amj'$G|+hj
{ ;a~
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try{ t'e5!Ma
output = new DataOutputStream(new FileOutputStream(tmpFile)); wp>L}!
output.writeInt(nStartPos.length); \~I>@SG2W+
for(int i=0;i<nStartPos.length;i++) G57c 8}\4
{ h~u|v[@{J
// output.writeLong(nPos); d&t,^Hj
output.writeLong(fileSplitterFetch.nStartPos); Fz@9
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output.writeLong(fileSplitterFetch.nEndPos); $3^Cp_p6
} ix_&<?8
output.close(); ~qezr\$2
} CjUYwAy$k
catch(IOException e){e.printStackTrace ();} gH|:=vfYUR
catch(Exception e){e.printStackTrace ();} YaAOP'p
} )EIT>u=
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//读取保存的下载信息(文件指针位置) XW q@47FR
private void read_nPos() $'93:9tg
{ F0/!+ho
try{ 3?bTs =
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); N<T@GQwkS
int nCount = input.readInt(); z--Y
nStartPos = new long[nCount]; 4>(rskl_
nEndPos = new long[nCount]; ]q 3.^F
for(int i=0;i<nStartPos.length;i++) ^W,~
{ Q4F&#^02y
nStartPos = input.readLong();
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nEndPos = input.readLong(); o!W(
} E{{Kzr2$
input.close(); ^BhS*
} ^D A<=C-[!
catch(IOException e){e.printStackTrace ();} 5b;~&N4~
catch(Exception e){e.printStackTrace ();} |a>,FZv8e
} yUEvva
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private void processErrorCode(int nErrorCode) 2[g kDZ
{ f}w_]l#[G
System.err.println("Error Code : " + nErrorCode); p|Nh:4iN
} ZP9x3MHe
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//停止文件下载 HlraOp+
public void siteStop() yVgHu#?PM
{ p'\zL:3
bStop = true; |Ju d*z
for(int i=0;i<nStartPos.length;i++) \"6?*L|]
fileSplitterFetch.splitterStop(); C!W0L`r
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} lwm
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} Y |9
//负责部分文件的抓取 %`}nP3
**FileSplitterFetch.java U[W &D%'
*/ dK>sHUu
package NetFox; v:]z-zU
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import java.io.*; q@vqhE4
import java.net.*; jR>`Xz
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public class FileSplitterFetch extends Thread { 5Kw?#
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String sURL; //File URL %BF,;(P
long nStartPos; //File Snippet Start Position nB6 $*'
long nEndPos; //File Snippet End Position O2"5\@HfE
int nThreadID; //Thread's ID Lwn
boolean bDownOver = false; //Downing is over "D'"uMS`H
boolean bStop = false; //Stop identical 61](a;Di
FileAccessI fileAccessI = null; //File Access interface 8yk4#CZ
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ~]SCf@pRk
{ 63/a 0Yn
this.sURL = sURL; P=R-1V
this.nStartPos = nStart; zJov*^T-C
this.nEndPos = nEnd; !wTrWD!
nThreadID = id; zZ;V9KM>v
fileAccessI = new FileAccessI(sName,nStartPos);//定位 *auT_*
} B[9y<FB+
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public void run() ehTv@2b
{ D!&]jkUN
while(nStartPos < nEndPos && !bStop) K
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{ /h8100
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try{ w@pJ49
URL url = new URL(sURL); /QT>"
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); P=l 7m*m
httpConnection.setRequestProperty("User-Agent","NetFox"); *P8CzF^>\&
String sProperty = "bytes="+nStartPos+"-"; X0]{8v%
httpConnection.setRequestProperty("RANGE",sProperty); ~ +h4i'
Utility.log(sProperty); hDXaCift
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InputStream input = httpConnection.getInputStream(); vIf-TQw
//logResponseHead(httpConnection); [}yPy))A
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byte[] b = new byte[1024]; nDyA][
int nRead; 6j95>} @
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) #4<=Ira5
{ !*S,S{T8
nStartPos += fileAccessI.write(b,0,nRead); aW9\h_$
//if(nThreadID == 1) xjD."q
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); X8):R- J
} 9sI&d
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Utility.log("Thread " + nThreadID + " is over!"); LW k/h1
bDownOver = true; %+/Dv
//nPos = fileAccessI.write (b,0,nRead); r+k&W
} 'x5p ?m
catch(Exception e){e.printStackTrace ();} bo1J'pU
} sf/m@425
} TbLU[(m-n
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//打印回应的头信息 <KfR)7I$0a
public void logResponseHead(HttpURLConnection con) 9WI5\`*"
{ W]XM<# ^^
for(int i=1;;i++) 2_ 1RJ
{ ;e.8EL
String header=con.getHeaderFieldKey(i); p=3t!3
if(header!=null) +*,!q7Gt
//responseHeaders.put(header,httpConnection.getHeaderField(header)); {Qc,Nl
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Utility.log(header+" : "+con.getHeaderField(header)); xojt s;n
else Uz~B`
break; Kwi+}B!
} UA4c4~$S
} (V1;`sI8
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public void splitterStop() }ice*3'3
{ /GX>L)
bStop = true; ^4NRmlb
} .)=*Yr M
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} QUaV;6
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/* w]nt_xj
**FileAccess.java Bex;!1
*//文件访问(定位,写) 0U:X[2|)
package NetFox; %|ClYr
import java.io.*; pL!,1D!
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public class FileAccessI implements Serializable{ `JY+3d,Ui
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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 Z=Cw7E
RandomAccessFile oSavedFile; `Tf}h8*
long nPos; ` &bF@$((
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public FileAccessI() throws IOException X)6 G :cD
{ > ;#Y0
this("",0); H-nhq-fut
} S=lCzL;j"
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public FileAccessI(String sName,long nPos) throws IOException L)&^Pu
{ Z,/^lg c,
oSavedFile = new RandomAccessFile(sName,"rw"); l1|*(%p?X
this.nPos = nPos; ^#C+l
oSavedFile.seek(nPos); |&xaV-b9W
} wN10Drc
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public synchronized int write(byte[] b,int nStart,int nLen) lZ)6d-vK
{ xf/K+
int n = -1; .AOc$Nt
try{ mtkZF{3Jx
oSavedFile.write(b,nStart,nLen); ms;zC/
n = nLen; ]kx<aQ^
} ']fyD3N
catch(IOException e) S.Kcb=;"L
{ j,;f#+O`g
e.printStackTrace (); J%|;
} )/JVp>
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return n;
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} FyWf`XTO
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} qoH:_o8ClO
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/* .a :7|L#a
**SiteInfoBean.java GM9[ 0+u;
*/ SP<Sv8Okj
package NetFox; \m}a%/
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public class SiteInfoBean { v;5-1
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private String sSiteURL; //Site's URL 5de1r B|
private String sFilePath; //Saved File's Path =liyd74%`
private String sFileName; //Saved File's Name /m;Bwu
private int nSplitter; //Count of Splited Downloading File A^+k A)8
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public SiteInfoBean() u/wX7s
{//nSplitter的缺省值为5 s.rQiD
//default value of nSplitter is 5 1 oKY7i$
this("","","",5); &&52ji<3
} h$$JXf
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 'YGP42#
{ K3h];F!^
sSiteURL= sURL; lH`c&LL-=!
sFilePath = sPath; "Dk@-Ac
sFileName = sName; ^Ss<<
this.nSplitter = nSpiltter; PPrvVGP
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} bv(+$YR
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public String getSSiteURL() ib
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{ 2-qWR<E
return sSiteURL; 42hG}Gt
} *y|w9rp
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public void setSSiteURL(String value) !BrZTo
{ 9}2/ko
sSiteURL = value; 3AR'Zvn
} g#l!b%$
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public String getSFilePath() PBW_9&