/* Q{[@`bZB
**SiteFileFetch.java La9r
*/ qJ
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package NetFox; BMpF02Y|4
import java.io.*; M'DWu|dIBA
import java.net.*; sXiv,
*
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public class SiteFileFetch extends Thread { x~EKGoz3
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SiteInfoBean siteInfoBean = null; //文件信息Bean 8bt53ta
long[] nStartPos; //开始位置 ;T>+,
long[] nEndPos; //结束位置 &L%Jy #=
FileSplitterFetch[] fileSplitterFetch; //子线程对象 PyFj@n
long nFileLength; //文件长度 'PpZ/ry$
boolean bFirst = true; //是否第一次取文件 L%XXf3;c
boolean bStop = false; //停止标志 ` 5#hjLe
File tmpFile; //文件下载的临时信息 ~p\n&{P0
DataOutputStream output; //输出到文件的输出流 {OCJ(^8i
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 3b@VY'P
public SiteFileFetch(SiteInfoBean bean) throws IOException };r|}v !~_
{ 1A^1@^{m'
siteInfoBean = bean; Ig9d#c
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); g_vm&~U/'
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); GD&htob(
if(tmpFile.exists ()) w4,]2Ccn.
{ /&(1JqzlB
bFirst = false; e #M iaX
read_nPos(); +I@cO&CY|
} (ii(yz|
else %'0&ElQ
{ +ubnx{VC
nStartPos = new long[bean.getNSplitter()]; ?}8IQxU
nEndPos = new long[bean.getNSplitter()]; # $~ oe"
} cIb4-TeV
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} ,9\Snn
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public void run() n=o_1M|
{ J{tVa(.
//获得文件长度 qjAh6Q/E`
//分割文件 *ik/p
//实例FileSplitterFetch .$0Pr%0pWI
//启动FileSplitterFetch线程 C
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//等待子线程返回 Kt6>L5:94
try{ mxp Y&Y
if(bFirst) yFjVKp'P
{ |dk[cX>
nFileLength = getFileSize(); 8W -@N
if(nFileLength == -1) H^
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{ xA #H0?a]
System.err.println("File Length is not known!"); pj;
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} 6t7fa<
else if(nFileLength == -2) vq>l>as9O
{ k>5 O`Y:
System.err.println("File is not access!"); ;LQ9#M?
} ,Sg33N?
else opD-vDa h
{ mmP U
for(int i=0;i<nStartPos.length;i++) L/i(KF{
{ ]?&FOzN5$P
nStartPos = (long)(i*(nFileLength/nStartPos.length)); D:JS)+]
} /:p8I6;
for(int i=0;i<nEndPos.length-1;i++) :1;Q(9:v
{ X;!~<~@Y
nEndPos = nStartPos[i+1]; bfdVED
} p/*"4-S
nEndPos[nEndPos.length-1] = nFileLength; #epy%>
} p`P~i&_
} pbLGe'
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//启动子线程 78]gtJ
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; JJnYOau
for(int i=0;i<nStartPos.length;i++) P^i.La,
{ E\$C/}T
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), d#>y }H9
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), &z@~B&O
nStartPos,nEndPos,i); nIBFk?)6
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); >qh?L#Fk
fileSplitterFetch.start(); ]tY:,Mfs
} Cv^`&\[SW+
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;`UecLb#
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Yb:pAzw6
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", :(p)1=I
nEndPos = " + nFileLength); Lgi[u"Du
// fileSplitterFetch[nPos.length-1].start(); _~M^ uW^l
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//等待子线程结束 h{_*oBa
//int count = 0; 0m)&YFZ[(
//是否结束while循环 4l @)K9F
boolean breakWhile = false; f$F*3
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while(!bStop) ROdK8*jL
{ ZnfNQl[
write_nPos(); v>mn/a
Utility.sleep(500); NXU`wnVJ
breakWhile = true; aE/D*.0NI
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for(int i=0;i<nStartPos.length;i++) BX< dSK
{ AGq>=avv
if(!fileSplitterFetch.bDownOver) ]KuMz p!
{ ]'h; {;ug
breakWhile = false; J/ W{/E>;
break; RU&_j*U
} _Qd,VE
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} FxRXPt
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if(breakWhile) "A[ b
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break; |d}MxS`^
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//count++; S$[k Q|Am
//if(count>4) 0rE(p2
// siteStop(); rU2iy"L
} YQ]\uT>}&
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System.err.println("文件下载结束!"); M1!pQC_9
} \Fb| {6+
catch(Exception e){e.printStackTrace ();} Qe$k3!
} %b}gDWs
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//获得文件长度 m*e YC
public long getFileSize() ^^Jnv{)
{ EKZVF`L
int nFileLength = -1; A6"Hk0Hf
try{ ]%dnKP~
URL url = new URL(siteInfoBean.getSSiteURL()); :}q\tNY<
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); \a|L/9%
httpConnection.setRequestProperty("User-Agent","NetFox"); ,k0r
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int responseCode=httpConnection.getResponseCode(); +R.N%_
if(responseCode>=400)
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{ <{J5W6
processErrorCode(responseCode); " I+p
return -2; //-2 represent access is error ofdZ1F
} 6}dR$*=
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String sHeader; +K$NAT
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for(int i=1;;i++) x?yD=Mq_
{ acW'$@y9?N
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); G^Tk 20*
//Utility.log(in.readLine()); C"w
{\
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sHeader=httpConnection.getHeaderFieldKey(i); Ru\_dr2yI}
if(sHeader!=null) 1np^(['ih
{ U4,2 br>
if(sHeader.equals("Content-Length")) m7qqY
{ }5 9U}@xC
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); yL1bS|@
break; Bl;KOR
} C+V*
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} t+TYb#Tc
else `\Unpp\I
break; 0pgY1i7
} 53OJ-m%a
} Y)I8eU{Wl(
catch(IOException e){e.printStackTrace ();} KeBQH8A1N
catch(Exception e){e.printStackTrace ();} *nTU#U
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Utility.log(nFileLength); ANMg
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return nFileLength; G*}F5.>8(
} saZ>?Owz
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//保存下载信息(文件指针位置) ?.bnIwQe
private void write_nPos() HgRwiIt
{ ;</Lf=+Vm
try{ F?4(5 K
output = new DataOutputStream(new FileOutputStream(tmpFile)); kCP$I732
output.writeInt(nStartPos.length); m
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for(int i=0;i<nStartPos.length;i++) H{G{H=K_
{ ]B4}eBt5)@
// output.writeLong(nPos); b"j|Bb
output.writeLong(fileSplitterFetch.nStartPos); #=,(JmQPt
output.writeLong(fileSplitterFetch.nEndPos); GG6%bF
} edC4BHE
output.close(); S"2qJ!.u
} +8P,s[0<R_
catch(IOException e){e.printStackTrace ();} w
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catch(Exception e){e.printStackTrace ();} ((3}LQ
} 6XV<?
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//读取保存的下载信息(文件指针位置) #gbH^a'
private void read_nPos() 2y GOzc
{ i%{X9!*%TX
try{ y=sGe!^
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); f@V3\Z/6E
int nCount = input.readInt(); a}nbo4jK
nStartPos = new long[nCount]; 3smM,fi
nEndPos = new long[nCount]; ":;@Hnb/
for(int i=0;i<nStartPos.length;i++) "4xfrlOc
{ P9Q2gVGAO{
nStartPos = input.readLong(); tbDoP
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nEndPos = input.readLong(); I4_d[O9
} lX!`zy{3k
input.close(); 6j9)/ HP
} =[tSd)D,y
catch(IOException e){e.printStackTrace ();} 2 h|e
catch(Exception e){e.printStackTrace ();} H=MCjh&$q
} H#d:kil Ny
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}=}>9DSM
private void processErrorCode(int nErrorCode) b\55,La
{ Jobiq]|>
System.err.println("Error Code : " + nErrorCode); L\aBc}
} v:_B kHN'
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//停止文件下载 *TdnB'Gd
public void siteStop() <9A@`_';Aq
{ Ka_S n
bStop = true; ]Uc`J8p,
for(int i=0;i<nStartPos.length;i++) S 01wwZ
fileSplitterFetch.splitterStop(); \+PIe7f_
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} %"$@%"8;3
} Yx d X#3
//负责部分文件的抓取 -p,x&h,p
**FileSplitterFetch.java b'@we0V@S
*/ C*6S@4k
package NetFox; IO$z%r7
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import java.io.*; J{"kw1Lu
import java.net.*; b!>\2DlyJ
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public class FileSplitterFetch extends Thread { 2ef;NC.&n
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String sURL; //File URL ]gb=
long nStartPos; //File Snippet Start Position S[:xqzyDg
long nEndPos; //File Snippet End Position ;&;W
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int nThreadID; //Thread's ID Ze^jG-SL$9
boolean bDownOver = false; //Downing is over q }C+tn"\
boolean bStop = false; //Stop identical rw%l*xgX
FileAccessI fileAccessI = null; //File Access interface !$qKb_#nC
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException VDEv>u4
{ }OShT+xeX
this.sURL = sURL; j8 ,n7!G
this.nStartPos = nStart; >um!Eo
this.nEndPos = nEnd; ` (4pu6uT
nThreadID = id; XR+3j/zEQ
fileAccessI = new FileAccessI(sName,nStartPos);//定位 +FFG#6e
} <&!]K?Q9i
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public void run() 4g
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{ ^C^*,V3
while(nStartPos < nEndPos && !bStop) 'C+;r?1!h
{ *e"a0
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try{ jk~:\8M(A
URL url = new URL(sURL); Fw4*
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 8Z#j7)G
httpConnection.setRequestProperty("User-Agent","NetFox"); eARk
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String sProperty = "bytes="+nStartPos+"-"; ?h\mk0[
httpConnection.setRequestProperty("RANGE",sProperty); MFit|C
Utility.log(sProperty); ;^k7zNf-
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InputStream input = httpConnection.getInputStream(); 0Ce]V,i6C>
//logResponseHead(httpConnection); ik1tidw
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byte[] b = new byte[1024]; B33$ u3d
int nRead; *tQk;'/A]
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) WPuz]Ty
{ wNCCH55Pt
nStartPos += fileAccessI.write(b,0,nRead); v@
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//if(nThreadID == 1) 7()?C}Ni-
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); gz#4{iT~
} L-i>R:N4
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Utility.log("Thread " + nThreadID + " is over!"); SqPtWEq@P
bDownOver = true; B~WtZ-%%E
//nPos = fileAccessI.write (b,0,nRead); <_S@6?
} QOFvsJ<s
catch(Exception e){e.printStackTrace ();} H:&?ha,9
} >O`l8tM
} eBW=^B"y+
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//打印回应的头信息 8}p8r|d!ls
public void logResponseHead(HttpURLConnection con) <EX7WA
{ |(IO=V4P
for(int i=1;;i++) $r.U
{ [2Mbk~
String header=con.getHeaderFieldKey(i); 1hQN8!: <
if(header!=null) oW}!vf3z
//responseHeaders.put(header,httpConnection.getHeaderField(header)); T`YwJ6N
Utility.log(header+" : "+con.getHeaderField(header)); ]TpU"JD
else U\<-mXv
break; N_wp{4 0/
} ks(SjEF
} Ws[D{dS/
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public void splitterStop() 'A{h iY
{ *MM#Z?mP
bStop = true; >=,uau7
} F#r#}.B='U
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} 8QgA@y"
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/* rs8\)\z
**FileAccess.java B&KL2&Z~Pq
*//文件访问(定位,写) {ShgJ;! Q
package NetFox; mB 55PYA
import java.io.*; 3Kq`<B~%
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public class FileAccessI implements Serializable{
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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 %CH6lY=lI
RandomAccessFile oSavedFile; ]?l{j
long nPos; O12Q8Oj!0
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public FileAccessI() throws IOException fv'4f$U
{ 0irr7Y
this("",0); 4*H"Z(HP
} >%%=0!,yX
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*>
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public FileAccessI(String sName,long nPos) throws IOException Opg#*w%-
{ [=M%
oSavedFile = new RandomAccessFile(sName,"rw"); |7F*MP
this.nPos = nPos; K'b*A$5o
oSavedFile.seek(nPos); L4'[XcY
} L10IF
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public synchronized int write(byte[] b,int nStart,int nLen) 7nE"F!d+0
{ `u'dh{,gE
int n = -1; pa/9F[
try{ #gZ|T
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oSavedFile.write(b,nStart,nLen); ~9M!)\~
n = nLen; ;IP~Tb]&
} D!3{gV#
catch(IOException e) v548ysE)
{ "~+.Af
e.printStackTrace (); )C]x?R([m
} <e"J4gZf&
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return n; wq0aF"k
} N +Sq}hI
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} $Xf (^K
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/* =Viy^ieN$
**SiteInfoBean.java " ~Q*XN2
*/ d0UZ+ RR#
package NetFox; knHv?#
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public class SiteInfoBean { %$X\"
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private String sSiteURL; //Site's URL y?:dE.5p|
private String sFilePath; //Saved File's Path YMzBAf
private String sFileName; //Saved File's Name Go8F5a@j
private int nSplitter; //Count of Splited Downloading File BQrL7y
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public SiteInfoBean() o:\XRPB
{//nSplitter的缺省值为5 x-Z^Q C
//default value of nSplitter is 5 Lo`F
this("","","",5); 4M`Xrfwm'[
} `iYc<N`
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) zy)i1d
{ _wu*M
sSiteURL= sURL; P[i\e7mR
sFilePath = sPath; 2P}I'4C-
sFileName = sName; f1cl';
this.nSplitter = nSpiltter; SGf9U^ds
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