/* 0*$? =E
**SiteFileFetch.java BN\Y
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*/ >F7v'-*{
package NetFox; vU|=" #
import java.io.*; |hGi8
import java.net.*; kD1[6cJ!=.
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public class SiteFileFetch extends Thread { )2vkaR
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SiteInfoBean siteInfoBean = null; //文件信息Bean R;D|To!
long[] nStartPos; //开始位置 F&pJ faig
long[] nEndPos; //结束位置 BhFyEY(
FileSplitterFetch[] fileSplitterFetch; //子线程对象 5}-e9U
long nFileLength; //文件长度 !| ObNS
boolean bFirst = true; //是否第一次取文件 Sy\ec{$+V]
boolean bStop = false; //停止标志 o&-c5X4
File tmpFile; //文件下载的临时信息 =XAFW
DataOutputStream output; //输出到文件的输出流 HYqDaRn
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) [@K#BFA
public SiteFileFetch(SiteInfoBean bean) throws IOException leY fF
{ ";vP77|m7R
siteInfoBean = bean; )S~ySiJ<U
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); oW7\T!f
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); &4]~s:F
if(tmpFile.exists ()) #i6ZY^+ee
{ Iq/V[v
bFirst = false; *Y"j 0Yob
read_nPos(); f\cm84
} bSbUf%LKt
else a[).'$S}'
{ aJ;6!WFW
nStartPos = new long[bean.getNSplitter()]; 1uz7E
nEndPos = new long[bean.getNSplitter()]; ZV,1IaO
} tZ4Zj`x|^
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} *21foBfqh
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public void run() BZUA/;Hz &
{ &n 1 \^:
//获得文件长度 IgxZ_2hO
//分割文件 (A<'{J#5,
//实例FileSplitterFetch bi=IIVlH
//启动FileSplitterFetch线程 iRwlK5(&
//等待子线程返回 F@C^nX9
try{ A]x'!qa@=
if(bFirst)
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{ @20~R/vh
nFileLength = getFileSize(); &i/QFO7y}
if(nFileLength == -1) WJXQM[
{ !`UHr]HJ
System.err.println("File Length is not known!"); %+Az
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} %BV2 q
else if(nFileLength == -2) )'pc 1I
{ iD/r8_}
System.err.println("File is not access!"); '5:P,1tWU
} B%~D`[~?
else \@%sX24 D
{ WZ#|?pJ
for(int i=0;i<nStartPos.length;i++) jjbw+
{ d|~A>YZ
nStartPos = (long)(i*(nFileLength/nStartPos.length)); k~P{Rm;F
} ~C;1}P%9x
for(int i=0;i<nEndPos.length-1;i++) OI0tgkG
{ W5#5RK"uX
nEndPos = nStartPos[i+1]; ga#Yd}G^~3
} |N^z=g P[
nEndPos[nEndPos.length-1] = nFileLength; ~wX4j
} NEY
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} h3z=tu['
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//启动子线程 ohy?l
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; jT6zpi~]E
for(int i=0;i<nStartPos.length;i++) @X\2K?c(v
{ T@. $Zpz
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Y64B"J=P9
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), x?|C-v
nStartPos,nEndPos,i); P0/B!8x
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *,Mg
fileSplitterFetch.start(); Xy;!Q`h(
} .JJ^w!|>#
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), NbDfD3
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); G0u3*.
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", s</llJ$
nEndPos = " + nFileLength); #_zd`s3k
// fileSplitterFetch[nPos.length-1].start(); Qey6E9eCA
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//等待子线程结束 p| #gn<z}
//int count = 0; O8J:Tw}M*
//是否结束while循环 UdSu:V|
boolean breakWhile = false; 6BPZ2EQ
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while(!bStop) lQ}e"#<
{ &dC #nw
write_nPos(); [H3~b=
Utility.sleep(500); Q I.*6-(
breakWhile = true; UpA{$@
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for(int i=0;i<nStartPos.length;i++) BhMHT:m
{
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if(!fileSplitterFetch.bDownOver) 9hG+?
{ YBX7WZCR
breakWhile = false; T21SuM
break; 0H V-e
} &M,"%w!
} BBg&ZIYEh
if(breakWhile) C~5-E{i
break; E9Q?@' h
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//count++; 7 %P?3
//if(count>4) ]/d4o
// siteStop(); ,8F?v~C
} >%"Q]p
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System.err.println("文件下载结束!"); zn4Yo
} 10/N-=NG18
catch(Exception e){e.printStackTrace ();} FC= %_y
} n.m6n*sf7
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//获得文件长度 3xW;qNj:!l
public long getFileSize() ;'Pi(TA)
{ 'z#{'`$a
int nFileLength = -1; (VPT% l6
try{ !n`ogzOh
URL url = new URL(siteInfoBean.getSSiteURL()); jH*+\:UP-
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); VesO/xG<
httpConnection.setRequestProperty("User-Agent","NetFox"); o3;u*f0rWn
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int responseCode=httpConnection.getResponseCode(); zN\~v
if(responseCode>=400) C/P,W>8
{ {C%/>e2-%
processErrorCode(responseCode); S|A?z)I
return -2; //-2 represent access is error %@!Vx
} HY]vaA`
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String sHeader; X7sWu{n
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for(int i=1;;i++) -(n[^48K
{ qj71
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Ru?Ue4W^b
//Utility.log(in.readLine()); Ii?"`d +JA
sHeader=httpConnection.getHeaderFieldKey(i); .P=uR8
if(sHeader!=null) 9?*BN\E5S
{ Z_qs_/y
if(sHeader.equals("Content-Length")) b; SFnZa8
{ S.+)">buH
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); @o+T<}kW X
break; SnbH`\U"
} IbpE@C
} N(?yOB4gt
else xG_ ;F
break; {rWu`QT
} +q]
} a9GOY+;bf
catch(IOException e){e.printStackTrace ();} R]%ZqT{PS
catch(Exception e){e.printStackTrace ();} h2Ifq!(:
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Utility.log(nFileLength); laM0W5
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return nFileLength; gKg2Ntxj
} )o[ O%b
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//保存下载信息(文件指针位置) b?o T|@
private void write_nPos() VEd#LSh
{ O0"i>}g4
try{ a4,bP*H
output = new DataOutputStream(new FileOutputStream(tmpFile)); Do(7LidC5
output.writeInt(nStartPos.length); qy@gW@IU
for(int i=0;i<nStartPos.length;i++) [E(DGt
{ J`O4]XRY
// output.writeLong(nPos); 1!\!3xa V
output.writeLong(fileSplitterFetch.nStartPos); xIF
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output.writeLong(fileSplitterFetch.nEndPos); RlX;c!K
} jh]wHG
output.close(); ',0~ \V
} vjJ!d#8
catch(IOException e){e.printStackTrace ();} ]}9y>+>
catch(Exception e){e.printStackTrace ();} #;H,`r
} `QR2!W70o3
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//读取保存的下载信息(文件指针位置) wCBL1[~C
private void read_nPos() ja~b5Tf9
{ @( 9#\%=
try{ Ts;W,pgP
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Wuosr3P
int nCount = input.readInt(); mN?'Aey
nStartPos = new long[nCount]; "yc/8{U
nEndPos = new long[nCount]; 1X2oz
for(int i=0;i<nStartPos.length;i++) C[rYVa
.
{ U:MkA(S%c
nStartPos = input.readLong(); <_ */
nEndPos = input.readLong(); _\"P<+!
} #rV=!j||
input.close(); @DkPJla&
} N)RWC7th{
catch(IOException e){e.printStackTrace ();} _OcgD<
catch(Exception e){e.printStackTrace ();} }QncTw0
} fB"3R-H?O
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private void processErrorCode(int nErrorCode) 5];
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{ ;k7` `
System.err.println("Error Code : " + nErrorCode); 6kT
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} xbo-~{
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//停止文件下载 Q|gun}
public void siteStop() D5T\X-+]O
{ 6FSw_[ )
bStop = true; .2
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for(int i=0;i<nStartPos.length;i++) 2k"a%#H8
fileSplitterFetch.splitterStop(); /~7H<^}
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} FEaf&'G]
} P
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//负责部分文件的抓取 Di *+Cz;gK
**FileSplitterFetch.java An[*Jx
*/ 4>Uo0NfL
package NetFox; l(=#c/f
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import java.io.*; r=L9x/r
import java.net.*;
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public class FileSplitterFetch extends Thread { &O0+\A9tP
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String sURL; //File URL }~QB2&3
long nStartPos; //File Snippet Start Position mSwOP
long nEndPos; //File Snippet End Position 5Tu#o()
int nThreadID; //Thread's ID l`I]eTo)^
boolean bDownOver = false; //Downing is over {k?Y:
boolean bStop = false; //Stop identical f[.hN
FileAccessI fileAccessI = null; //File Access interface W]2;5`MM
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException h%=b"x
{ ;\<?LTp/r
this.sURL = sURL; Z(as@gjH
this.nStartPos = nStart; c_ygwO3.Q
this.nEndPos = nEnd; }lpcbm
nThreadID = id; [p o+a@ %
fileAccessI = new FileAccessI(sName,nStartPos);//定位 kOdS^-
} =53LapTPJ
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public void run() @/$mZ]|T
{ F|P2\SPL
while(nStartPos < nEndPos && !bStop) "bf8[D
{ n+Ag |.,|
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;
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try{ BLaXp0
URL url = new URL(sURL); 'dU$QO
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Jh466;
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httpConnection.setRequestProperty("User-Agent","NetFox"); [0 &Lvx
String sProperty = "bytes="+nStartPos+"-"; &/JnAfmYqt
httpConnection.setRequestProperty("RANGE",sProperty); wkJB5i^<w
Utility.log(sProperty); GV[%P
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InputStream input = httpConnection.getInputStream(); E0O{5YF^T
//logResponseHead(httpConnection); FJ U)AjS~
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byte[] b = new byte[1024]; }7.q[ ^oF
int nRead; akCl05YW
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) M;iaNL(
{ l?FNYvL
nStartPos += fileAccessI.write(b,0,nRead); C>K/C!5?
//if(nThreadID == 1) _ZS<zQ'
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); t9`NCng
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} dhVwS$O )
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Utility.log("Thread " + nThreadID + " is over!"); 8OFrW.>[
bDownOver = true; vq5I 2
//nPos = fileAccessI.write (b,0,nRead); <M&]*|q>g%
} n/|/Womr
catch(Exception e){e.printStackTrace ();} epG;=\f}m`
} w5*18L=O\
} ^U`q1Pg5
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//打印回应的头信息 njq-iU
public void logResponseHead(HttpURLConnection con) &pba~X.u
{ 2(c#m*Q!b
for(int i=1;;i++) kcOpO<oE
{ Xj@Kt|&`k
String header=con.getHeaderFieldKey(i); ]yIy~V
if(header!=null) wlpbfO e/
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ):|)/ZiC'
Utility.log(header+" : "+con.getHeaderField(header)); ?Jr<gn^D
else /N^+a-.Qd
break; u?J(l)gd
} CD tYj
} Q-au)R,
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public void splitterStop() B}FF |0<
{ R|M:6]}
bStop = true; s24H.>Z
} C {,d4KG
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} f7W=x6Z4
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/* (\I =v".
**FileAccess.java 0=5i\*5 p
*//文件访问(定位,写) B~ez>/H^
package NetFox; 2?ednMoE
import java.io.*; >lj3MNSH
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public class FileAccessI implements Serializable{ s6]f#s5o
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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 POG5x
RandomAccessFile oSavedFile; +OH."4Z
long nPos; V&nN/CF
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public FileAccessI() throws IOException 2X]\:<[4
{ B>mQ\Q
this("",0); !INr
} M@K[i*e
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public FileAccessI(String sName,long nPos) throws IOException onlyvH4
{ /PCQv_Y&,/
oSavedFile = new RandomAccessFile(sName,"rw"); yh)q96m-V=
this.nPos = nPos; BdKwWgi+a
oSavedFile.seek(nPos); **"P A8
} @hvq,[
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public synchronized int write(byte[] b,int nStart,int nLen) ^v'Lu!\f
{ {8MF!CG]
int n = -1; 9x1Dyz 2?F
try{ Z4!3I@yZ
oSavedFile.write(b,nStart,nLen); |eqDT,4
n = nLen; 5 9vGLN!L
} tc',c},h~,
catch(IOException e)
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{ IviWS84
e.printStackTrace (); Pm_=
} 21[F%,{.),
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return n; Pla EI p
} 88K*d8m
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} /$=^0v+
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/* 24Fxx9g
**SiteInfoBean.java Bz{
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*/ S`G\Cd;5
package NetFox; [ZbK)L+_
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public class SiteInfoBean { ;D1IhDC
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private String sSiteURL; //Site's URL SMyg=B\x?7
private String sFilePath; //Saved File's Path 1dcy+ !>
private String sFileName; //Saved File's Name Ml Z`g,{
private int nSplitter; //Count of Splited Downloading File L7- nPH
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public SiteInfoBean() -,dQ&Qf?
{//nSplitter的缺省值为5 D|o@(V
//default value of nSplitter is 5 R;o_ *
this("","","",5); dc)Gk
} _+En%p.m
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) u_BSWhiW
{ [XXN0+ /
sSiteURL= sURL; W<Lrfo&=Y]
sFilePath = sPath; g$b*#
sFileName = sName; .IXwa,
this.nSplitter = nSpiltter; y#+o*(=fRE
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} J%)2,szn0
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public String getSSiteURL() o1Ln7r.
{ zTLn*?
return sSiteURL; Pcs@`&}7r
} Q-v[O4y~
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public void setSSiteURL(String value) :3f2^(b~^
{ &}O!l'
sSiteURL = value; jvQ"cs$.
} kdCOcJB
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public String getSFilePath() 9f,:j
{ >9`ep7
return sFilePath; m+vEs,W.
} i7V~LO:gq
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public void setSFilePath(String value) jhv1 D'>6
{ cqx1NWlY
sFilePath = value; }=a4uCE
} `Ny8u")=
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public String getSFileName() / JB4 #i7
{ )*h~dx_c m
return sFileName; 9#ft;c
} @
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public void setSFileName(String value) $0T"YC%
{ 4- _lf(#i
sFileName = value; 2-aYqMmT;
} sv"mba.J
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public int getNSplitter() AF]!wUKxy
{ S:/RYT"
return nSplitter; 1i:g
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} OL5HofgNm
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public void setNSplitter(int nCount) 9^ p{/Io
{ |+-i'N9
nSplitter = nCount; RWCS
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} &pjV4m|j<
} ~aAJn IO
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/* @BUqQ9q:
**Utility.java 3^>a TU<Z
*/ od*Z$Hb>'
package NetFox; vN:[
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public class Utility { /;6@M=6u
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public Utility() 2Fg t)`{!
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} D1 ~x
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//线程睡眠 < iI6@X>
public static void sleep(int nSecond) ([b!$o<v
{ y*h1W4:^-
try{ #Jz&9I<OKx
Thread.sleep(nSecond); 9zYiG3 d
} NjN?RB/5
catch(Exception e) cvE.r330|
{ LG{inhbp
e.printStackTrace (); 7'i#!5
} 6\fMzm
} RS `9?c:
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//日志 5}bZs` C
public static void log(String sMsg) D%UZ'bHN*
{ q|i%)V`)-
System.err.println(sMsg); $?J+dB
} [[]SkLZHg
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