/* 4z-sR/ d
**SiteFileFetch.java =2#a@D6Bl
*/ [y
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package NetFox; iTU8WWY<
import java.io.*; ^4Ra$<
import java.net.*; 'sJ=h0d_[V
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public class SiteFileFetch extends Thread { J/j1Yf'9
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SiteInfoBean siteInfoBean = null; //文件信息Bean X75>C<
long[] nStartPos; //开始位置 KQ3]'2q
long[] nEndPos; //结束位置 3A k,M-Jp
FileSplitterFetch[] fileSplitterFetch; //子线程对象 9`\hG%F
long nFileLength; //文件长度 @oC8:
boolean bFirst = true; //是否第一次取文件 aG?ko*A;
boolean bStop = false; //停止标志 %R5APMg1
File tmpFile; //文件下载的临时信息 B^Q\l!r
DataOutputStream output; //输出到文件的输出流 OiX>^_iDt
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) @FL?,_,Y{
public SiteFileFetch(SiteInfoBean bean) throws IOException 3%m2$\
{ |,bsMJh0
siteInfoBean = bean; *L8Pj`zR
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ks7g*; 3{@
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); .ag4i;hS8
if(tmpFile.exists ()) T#^
{ z8M^TV
bFirst = false; cTmoz.0
read_nPos(); x^}kG[s
} T[s_w-<7$
else I,vy__sZ
{ <3z]d?u
nStartPos = new long[bean.getNSplitter()]; $78fR8|r-
nEndPos = new long[bean.getNSplitter()]; ys:1%D,,_
} 9@Yk8
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public void run()
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{ =C8 t5BZ"
//获得文件长度 /ZZo`
//分割文件 S*],18z?
//实例FileSplitterFetch cu(2BDfiL
//启动FileSplitterFetch线程 `w6\II)aB
//等待子线程返回 `GS!$9j
try{ 5Fm.] /
if(bFirst) mv%fX2.
{ Lv+lLK
nFileLength = getFileSize(); LYNd^}
if(nFileLength == -1) {<iIL3\mC
{ MPA<?
System.err.println("File Length is not known!"); 7}>j [
}
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else if(nFileLength == -2) jI(~\`
{ F"VNz^6laV
System.err.println("File is not access!"); V"(S<o
} 7kO5hlKeo
else /8@JWK^I{
{ LEvdPG$)
for(int i=0;i<nStartPos.length;i++) jFpXTy[>
{ dG}fpQ3&
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 12DMb9_rp
} 1.!rq,+>1
for(int i=0;i<nEndPos.length-1;i++) +Sv`23G@
{ _,_>B8
nEndPos = nStartPos[i+1]; gBUtv|(@>[
} B;Ab`UX#t
nEndPos[nEndPos.length-1] = nFileLength; G*uy@s:
} |1X^@
} CUfD[un2D
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//启动子线程 r<c yxR~
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; x:b0G
for(int i=0;i<nStartPos.length;i++) @4Z>;
{ tKrr5SRb
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), n
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), }"wWSPD
nStartPos,nEndPos,i); _C~e(/=z
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); % ribxgmd
fileSplitterFetch.start(); (h7 rW3
} YW9 [^
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); P;bl+a'gu
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", \NKf$"x}
nEndPos = " + nFileLength); j0^~="p%C
// fileSplitterFetch[nPos.length-1].start(); &G7JGar
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//等待子线程结束 &0SX*KyI
//int count = 0; .x5Yfe
//是否结束while循环 )dgXS//Y
boolean breakWhile = false; 7)!(0.&
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while(!bStop) f305 yo
{ j*nZ
write_nPos(); $cEl6(66iX
Utility.sleep(500); vpcx 1t<
breakWhile = true; `}#(Ze*V:
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for(int i=0;i<nStartPos.length;i++) -;&aU;k
{ $D
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if(!fileSplitterFetch.bDownOver) 34k<7X`I
{ v]\io#
breakWhile = false; eyf\j,xP&
break; iM+K&\{_h
} )$Xd#bzD|
} A9\m.3jo
if(breakWhile) Y,?s-AB
break; kmPK |R
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//count++; CwZ+Pn0
//if(count>4) {%5k1,/(
// siteStop(); |ybW
} uN20sD}
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System.err.println("文件下载结束!"); Yh)yp?
} &cztUM(
catch(Exception e){e.printStackTrace ();} #D M%_HXDi
} &54fFyJF
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//获得文件长度 O^ZOc0<
public long getFileSize() <
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{ )k@W6N
int nFileLength = -1; Ab`mID:
try{ oVutHt
URL url = new URL(siteInfoBean.getSSiteURL()); 7|LJwXQ-
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (e sTb,
httpConnection.setRequestProperty("User-Agent","NetFox"); HSGM&!5mW
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int responseCode=httpConnection.getResponseCode(); ufAp7m@ud
if(responseCode>=400) =<w6yeko
{ d!kiWmw,
processErrorCode(responseCode); 6,
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return -2; //-2 represent access is error JR{3n*
} <ABN/nH
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String sHeader; @Aa$k:_
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for(int i=1;;i++) #R$d6N[H
{ |d^r"wbs3
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); +;~JHx.~X
//Utility.log(in.readLine()); y;Xb."e~
sHeader=httpConnection.getHeaderFieldKey(i); sPY*2B
if(sHeader!=null) n^P=a'+
{ @/h_v#W
if(sHeader.equals("Content-Length")) U">J$M@
{ -BUxQ8/,
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); x)0g31 49
break; 9t@^P^}=\m
} ?hUC#{
} 4GWt.+{J$
else YVt#( jl
break; @s!9 T
} Kn3qq
} <"w;:Zs
catch(IOException e){e.printStackTrace ();} V\^rs41$;
catch(Exception e){e.printStackTrace ();} /.<%y8v
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Utility.log(nFileLength); 4DI.RK9
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return nFileLength; *O-1zIlp
} bOjvrg;Sz\
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//保存下载信息(文件指针位置) 0VC8'6S_k
private void write_nPos() owL>w
{ ry9%Y3
try{ ~qQSt%
output = new DataOutputStream(new FileOutputStream(tmpFile)); #mg6F$E
output.writeInt(nStartPos.length); YW55iyM
for(int i=0;i<nStartPos.length;i++) lJ.:5$2H
{ 'Lu7cb^
// output.writeLong(nPos); <>/0;J1<
output.writeLong(fileSplitterFetch.nStartPos); PD$XLZ
output.writeLong(fileSplitterFetch.nEndPos); z=1 J{]
} Kp?):6
output.close(); [tYly`F
} taOD,}c|$
catch(IOException e){e.printStackTrace ();} *0zdI<Oe
catch(Exception e){e.printStackTrace ();} *y[i~{7:
} Jydz2
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//读取保存的下载信息(文件指针位置) `tA~"J$32l
private void read_nPos() K] ;`
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try{ !4-B
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DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 3wZA,Z
int nCount = input.readInt(); z%cq%P8g
nStartPos = new long[nCount]; g a|RW0
nEndPos = new long[nCount]; u&Q2/Y
for(int i=0;i<nStartPos.length;i++) <#AS[Q[N
{ ,E,oz {,i(
nStartPos = input.readLong(); Ut:>'TwG
nEndPos = input.readLong(); 2g
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} 3vRRL
input.close(); SXX6EIJr|
} #xL^S9P
catch(IOException e){e.printStackTrace ();} l`c&nf6
catch(Exception e){e.printStackTrace ();} BeP]M1\?>
} =^ur@E
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private void processErrorCode(int nErrorCode) 4oW6&1
{ Yw7+wc8R
System.err.println("Error Code : " + nErrorCode); 7A0D[?^xe
} <Stfqa6FJ
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//停止文件下载 +~~FfIzf#
public void siteStop() 3[8F:I0UL
{ 5Y<O
bStop = true; cHN
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for(int i=0;i<nStartPos.length;i++) c(Liwuj
fileSplitterFetch.splitterStop(); \uxDMKy
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} !GJnYDN
} a1V+doC
//负责部分文件的抓取 5IOMc4v
**FileSplitterFetch.java 'r`#u@TTZ
*/ {m1=#*
package NetFox; CZ&VP%
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import java.io.*; E]eVoC
import java.net.*; 3I0=^>A
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public class FileSplitterFetch extends Thread { ,_HSvs7-
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String sURL; //File URL Z"spua5
long nStartPos; //File Snippet Start Position Wjf UbKg0
long nEndPos; //File Snippet End Position r![RRa^
int nThreadID; //Thread's ID j2GO ZKy
boolean bDownOver = false; //Downing is over q2Xm~uN`)
boolean bStop = false; //Stop identical ]fc9m~0N,\
FileAccessI fileAccessI = null; //File Access interface #1-y[w/
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException aH@Ux?-}
{ 8yr_A[S8.
this.sURL = sURL; ;3ZHm*xJx
this.nStartPos = nStart; E]G#"EV!Y
this.nEndPos = nEnd; ?UD2}D[M
nThreadID = id; #H]cb#
fileAccessI = new FileAccessI(sName,nStartPos);//定位 32DT]{-N!
} CXC,@T
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public void run() ?.E ixGzI^
{ o`B,Pt5vu
while(nStartPos < nEndPos && !bStop) ;dXQB>Za
{ r{DR$jD
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try{ l=(4o4um
URL url = new URL(sURL); y+3<
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HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); B8Ob~?
httpConnection.setRequestProperty("User-Agent","NetFox"); }e}J6[wP
String sProperty = "bytes="+nStartPos+"-"; H(qDQqJHYy
httpConnection.setRequestProperty("RANGE",sProperty); C$MaJHkiF
Utility.log(sProperty); /_Z--s>j
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InputStream input = httpConnection.getInputStream(); A`E7V}~
//logResponseHead(httpConnection); 6=V&3|"
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byte[] b = new byte[1024]; /mMRV:pd
int nRead; N[$bP)h7
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) .
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{ *Xh)22~T
nStartPos += fileAccessI.write(b,0,nRead); /cn=8%!N
//if(nThreadID == 1)
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// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
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} F
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Utility.log("Thread " + nThreadID + " is over!");
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bDownOver = true; N?!]^jI,
//nPos = fileAccessI.write (b,0,nRead); 0IHcyb
} !Pnvqgp/
catch(Exception e){e.printStackTrace ();} <0my,hAK
} uyr56
} CXqU<a&
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//打印回应的头信息 dZnAdlJ
public void logResponseHead(HttpURLConnection con) lq2P10j@
{ HCP'V
for(int i=1;;i++) nS xFz!
{ aAY=0rCI-
String header=con.getHeaderFieldKey(i); Ns.b8Y
if(header!=null) S{cy|QD
//responseHeaders.put(header,httpConnection.getHeaderField(header)); c(@V
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Utility.log(header+" : "+con.getHeaderField(header)); r)$(>/[$
else U
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break; QdaYP
} 5mNd5IM
} <0,c{e
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public void splitterStop() YVy+1q[
{ C3|(XChqC
bStop = true; Xy{\>}i]N
} ;m/%g{oV
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} l4c9.'6
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/* ;q:.&dak1
**FileAccess.java 2BA'Zu`
*//文件访问(定位,写) 9F8"(
package NetFox; f?O?2g
import java.io.*; ~m~<xtoc
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public class FileAccessI implements Serializable{ %";bgU2Q
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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 R
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RandomAccessFile oSavedFile; <uXZ*E
long nPos; cPcp@Dp
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public FileAccessI() throws IOException W79wz\a
{ 7hPiPv
this("",0); > %5<fK2
} +o]DT7W
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public FileAccessI(String sName,long nPos) throws IOException T%kr&XsQX
{ n_[;2XQQ
oSavedFile = new RandomAccessFile(sName,"rw"); Ew>E]Ys
this.nPos = nPos; 0zD[mt
oSavedFile.seek(nPos); ?[#nh@mI
} '0z-duu
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public synchronized int write(byte[] b,int nStart,int nLen) =FXO 1UZ!
{ =b{wzx}e
int n = -1; P@Oq'y[
try{ i
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oSavedFile.write(b,nStart,nLen); ay}}v7)GM
n = nLen; =<ngtN
} E<u6 js,
catch(IOException e) I^h^QeBis
{ $@t]0
e.printStackTrace (); 37Z@a!#
} zS]8ma
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return n; #*QnO\.
} rPf<8oH
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} G:'hT=8
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/* SJ(<u2J]
**SiteInfoBean.java K0hmRR=
*/ R-Y07A
package NetFox; oWg"f*
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public class SiteInfoBean { xY]Y
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private String sSiteURL; //Site's URL u >R2:i
private String sFilePath; //Saved File's Path I_|@Fn[>
private String sFileName; //Saved File's Name #~(J
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private int nSplitter; //Count of Splited Downloading File koQ\]t'*As
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public SiteInfoBean() a o"\L0;{
{//nSplitter的缺省值为5 5Oh>r K(
//default value of nSplitter is 5 Uy$1X
this("","","",5); sFhmp
} .UJp#/EHs
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Aj9<4N
{ KxZup\\:v
sSiteURL= sURL; hzG+s#
sFilePath = sPath; >NL4&MV:
sFileName = sName; $9LI v
this.nSplitter = nSpiltter; 7OF6;@<
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} 6x?3%0Km
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public String getSSiteURL() ^*!Tq&Dst|
{ {<f |h)r
return sSiteURL; Yz6+
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} *qM)[XO
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public void setSSiteURL(String value) ,OGXH2!h
{ y2nwDw(xF
sSiteURL = value; Pe-1o#7~W
} >M~wFs$~
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public String getSFilePath() &x