/* fZ6lnZ
**SiteFileFetch.java xW*L^97 ;
*/ MyZ@I7Fb,
package NetFox; ZbJzf]y:6
import java.io.*; yG'5u p
import java.net.*; Ip]-OVg
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public class SiteFileFetch extends Thread { AW@I,
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SiteInfoBean siteInfoBean = null; //文件信息Bean w">XI)*z
long[] nStartPos; //开始位置 <5MnF
long[] nEndPos; //结束位置 +)Tt\Q%7
FileSplitterFetch[] fileSplitterFetch; //子线程对象 xZt] s3?
long nFileLength; //文件长度 tWVbD%u^
boolean bFirst = true; //是否第一次取文件 [E_6n$w
boolean bStop = false; //停止标志 XA}!
File tmpFile; //文件下载的临时信息 ']1j Mn
DataOutputStream output; //输出到文件的输出流 )'(7E$d
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) hA6!F#1
public SiteFileFetch(SiteInfoBean bean) throws IOException uJ,>Y#
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{ XoM+"R"
siteInfoBean = bean; Oqeoh<y!\
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); g$eb@0$
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ZRO
if(tmpFile.exists ()) 7Zp'}Om<I
{ \I; lgz2
bFirst = false; tUl#sqN_{
read_nPos(); LBT{I)-K
} s"`uE$6N
else ^R\0<\'
{ LhC%`w
nStartPos = new long[bean.getNSplitter()]; v-2O{^n
nEndPos = new long[bean.getNSplitter()]; vMKmHq
} {E!ie{~
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} NK]X ="`
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public void run() TTpK8cC
{ #R<4K0Xan
//获得文件长度 Epsc2TuH7
//分割文件 s2)a8<
//实例FileSplitterFetch l)GV&V
//启动FileSplitterFetch线程 Ee;&;Q,O.z
//等待子线程返回 k$?zh$
try{ 8r(S=dA
if(bFirst) i ]gF
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{ L=ZKY
nFileLength = getFileSize(); K.G}*uy
if(nFileLength == -1) 4FEOV,n
{ cf?*6q?n
System.err.println("File Length is not known!"); ;1^_.3
} {tMpI\>S
else if(nFileLength == -2) w+gA3Dg
{ Y s[J xP
System.err.println("File is not access!"); Zp]{e6J
}
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else =xScHy{$
{ =8[4gM+
for(int i=0;i<nStartPos.length;i++) lDd+.44V:
{ Se+sgw_"
nStartPos = (long)(i*(nFileLength/nStartPos.length)); v.H00}[.
} Wfgs[
for(int i=0;i<nEndPos.length-1;i++) wmdvAMN
{ udM<jY]5p
nEndPos = nStartPos[i+1]; XZhuV<
} iZ2|/hnw
nEndPos[nEndPos.length-1] = nFileLength; 6
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} =FQ]eb*
} !mH2IjcL
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//启动子线程 $EHAHNL?Lx
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; VU`aH9g3(
for(int i=0;i<nStartPos.length;i++) ykc$B5*
{ yg\bCvL&
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =7pLU+ u
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), FI{9k(
nStartPos,nEndPos,i); ,5Jq
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Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); #n5q$
fileSplitterFetch.start(); k/hE68<6i
}
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), qwJeeax
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 0G?0 Bo
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", /H&:
nEndPos = " + nFileLength); )MqF~[k<-
// fileSplitterFetch[nPos.length-1].start(); @1ZLr
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//等待子线程结束 R4v)}`x
//int count = 0; EeC5HgIU'C
//是否结束while循环 ;|&Ak_I2G
boolean breakWhile = false; YFgQ!\&59
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while(!bStop) 4HEp}Y"}V
{ vk:@rOpl
write_nPos(); rCqcl
Utility.sleep(500); M0g!"0?
breakWhile = true; ~E&drl\
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for(int i=0;i<nStartPos.length;i++) &niROM,;K
{ 7c$;-O
if(!fileSplitterFetch.bDownOver) v[WbQ5AND
{ a}eM ny
breakWhile = false; 5#/"0:2
break; 9Y&,dBj+
} uCuXY#R+
}
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if(breakWhile) aGvD
break; BtDi$d%'
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//count++; "J^M@k\!
//if(count>4) h3Kv0^{
// siteStop(); r!+-"hS!
} `r;e\Cp
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System.err.println("文件下载结束!"); 3{B`[$
} uV?[eiezD0
catch(Exception e){e.printStackTrace ();} R06q~ >
} sXxF5&AF0
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//获得文件长度 7RNf)nz
public long getFileSize() =;Gy"F1 dp
{ "pTyQT9P
int nFileLength = -1; "Wd?U[[
try{ C'3/B)u}l
URL url = new URL(siteInfoBean.getSSiteURL()); tAH,3Sz( /
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); j&) "a,f
httpConnection.setRequestProperty("User-Agent","NetFox"); 6KP"F[8I
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int responseCode=httpConnection.getResponseCode(); Hp;Dp!PLa
if(responseCode>=400) OV ~|@{6T
{ i~
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processErrorCode(responseCode); @(2DfrC
return -2; //-2 represent access is error "QA <5P
} u(V4KUk
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String sHeader; ?z>ZsD
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for(int i=1;;i++) $$+6=r}
{ ukBj@.~
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); e(E6 t_
//Utility.log(in.readLine()); 3Tv;<hF
sHeader=httpConnection.getHeaderFieldKey(i); X?5M)MP+I
if(sHeader!=null) .hW_P62\#
{ A|p O
if(sHeader.equals("Content-Length")) 1L.H"
{ _
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nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); %9hzz5#
break; J2VhheL`J
} {'P7D4w
} H: q(T
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else dE9xan
break; OpeK-K
} _
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} F aO=<jYi
catch(IOException e){e.printStackTrace ();} HVG9 C$
catch(Exception e){e.printStackTrace ();} AK%2#}k.
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Utility.log(nFileLength); to@ O
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return nFileLength; pcIJija:
} v~i/e+.h>y
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//保存下载信息(文件指针位置) ,&$=2<Dx
private void write_nPos() 9qxB/5d_
{ w]Z*"B&h
try{ jeM % XI
output = new DataOutputStream(new FileOutputStream(tmpFile)); n|5+HE4@
output.writeInt(nStartPos.length); 4r5trquC
for(int i=0;i<nStartPos.length;i++) d7Lna^
{ O}\$E{-
// output.writeLong(nPos); 8+m;zvDSU
output.writeLong(fileSplitterFetch.nStartPos); =w='qjh
output.writeLong(fileSplitterFetch.nEndPos); L/,#:J
} Kc~h
output.close(); V~p/P
} ZnDI
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catch(IOException e){e.printStackTrace ();} 1?s]nU
catch(Exception e){e.printStackTrace ();} Sgp$B:
} lN"%~n?
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//读取保存的下载信息(文件指针位置) G/ToiUY
private void read_nPos() ??Zh$^No:
{ Nb/W+& y
try{ &t1?=F,]
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 9A0wiKp
int nCount = input.readInt(); 9C[i#+_3M
nStartPos = new long[nCount]; B;.]<k'3
nEndPos = new long[nCount]; `0a=A#]1o
for(int i=0;i<nStartPos.length;i++) /Zs;dam
{ ./nq*4=
nStartPos = input.readLong();
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nEndPos = input.readLong(); WO{V,<;
} hd*bPj;
input.close(); Kp[ F@A#
} Ul#||B .c{
catch(IOException e){e.printStackTrace ();} 6}bUX_!&s
catch(Exception e){e.printStackTrace ();} ht _fbh(l
} P)bS ;w\(Y
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private void processErrorCode(int nErrorCode) OrN>4S
{ (}1 gO
System.err.println("Error Code : " + nErrorCode); .9X, )^D
} &c<0g`x
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//停止文件下载 aq/'2U 7
public void siteStop() tHgn-Dhzr
{ ge*(w{|x
bStop = true; =?fxPT[1K
for(int i=0;i<nStartPos.length;i++) r9[{0y!4
fileSplitterFetch.splitterStop(); #4uuT?!
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} FJ]BB4
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} J+oK:tzt8
//负责部分文件的抓取 M(>" e*Pi
**FileSplitterFetch.java
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*/ 26n+v(re
package NetFox; VNKtJmt
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import java.io.*; t#
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import java.net.*; yhnhORSY;
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public class FileSplitterFetch extends Thread { zq ;YE
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String sURL; //File URL %-C
long nStartPos; //File Snippet Start Position pRS+vV3
long nEndPos; //File Snippet End Position sp%EA=: E
int nThreadID; //Thread's ID Jv*[@
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boolean bDownOver = false; //Downing is over rGjP|v@3^
boolean bStop = false; //Stop identical iDp'M`(6h
FileAccessI fileAccessI = null; //File Access interface ico%_fp
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException @wa2Z
{ J,@SSmJ`
this.sURL = sURL; ' fXBWi6
this.nStartPos = nStart; s^:8bFn9$
this.nEndPos = nEnd; '~-JR>
nThreadID = id; Af'L=0
fileAccessI = new FileAccessI(sName,nStartPos);//定位 Z)=S. )
} ')!+>b(P
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public void run() pO^gooV\
{ b|7c]l
while(nStartPos < nEndPos && !bStop) %"#%/>U4
{ 5\hJ&
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try{ xqV>m
URL url = new URL(sURL); C*O648yz[
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); HR0t[*
httpConnection.setRequestProperty("User-Agent","NetFox"); !YJfP@"e6r
String sProperty = "bytes="+nStartPos+"-"; =*K~U# uoC
httpConnection.setRequestProperty("RANGE",sProperty); |^z?(?w
Utility.log(sProperty); VXr'Z
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InputStream input = httpConnection.getInputStream(); Vaj4p""\F
//logResponseHead(httpConnection); a~#MMl
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byte[] b = new byte[1024]; cL/6p0S
int nRead; fb8"hO]s
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ?9jl8r>
{ `$V7AqX (
nStartPos += fileAccessI.write(b,0,nRead); V4c$V]7
//if(nThreadID == 1) >GR L5Iow
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); e+Qq a4
} Z' cQ<
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Utility.log("Thread " + nThreadID + " is over!"); 2=?/$A9p
bDownOver = true; O3U6"{yJ)
//nPos = fileAccessI.write (b,0,nRead); :z=C
} ^Rgm3?7
catch(Exception e){e.printStackTrace ();} "S#}iYp
} R~9\mi5^UH
} {z":hmt
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//打印回应的头信息 )HLe8:PG~
public void logResponseHead(HttpURLConnection con) ?`& l Y
{ M]\p9p(_
for(int i=1;;i++) .uu[f2.N+
{ P F#X8+&J
String header=con.getHeaderFieldKey(i); (``EBEn
if(header!=null) =P* YwLb
//responseHeaders.put(header,httpConnection.getHeaderField(header)); \FVm_)
Utility.log(header+" : "+con.getHeaderField(header)); o;.6Y `-fJ
else x 6=Yt{
break; ;QMRm<CLV
} Gp}:U>V)
} #;4afj:2g
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public void splitterStop() UG)XA-ez
{ a[Q\8<
bStop = true; @I\&-Z ^
} gEWKM(5B}
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} {|Ew]Wq
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/* <IiX_*
**FileAccess.java i5oV,fiZo
*//文件访问(定位,写) :?!kZD!
package NetFox; ([Gb]0
import java.io.*; H@!\?5I
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public class FileAccessI implements Serializable{ Vl91I+Ev
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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 QG~4<zy
RandomAccessFile oSavedFile; $UgQ1Qc
long nPos; 2(_+PQ6C=
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public FileAccessI() throws IOException F*&A=@/3
{ UIhU[f]
this("",0); N>Dr
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} 6EHYIN^D
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public FileAccessI(String sName,long nPos) throws IOException Idq&0<I
{ B hO*Pfs
oSavedFile = new RandomAccessFile(sName,"rw"); ,4RmT\%T
this.nPos = nPos; 80i-)a\n
oSavedFile.seek(nPos); 7d44i
} iX3Y:
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public synchronized int write(byte[] b,int nStart,int nLen) fjc8@S5x9j
{ z_)`='&n
int n = -1; AFd3_>h
try{ Ch3{q/-g
oSavedFile.write(b,nStart,nLen); &$\B&Hp@
n = nLen; E?L^L3s
} ZGstD2N$
catch(IOException e) .@#GNZe
{ 'qhi8=*
e.printStackTrace (); \I!C`@0
} [M:ag_rm+f
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return n; pN-l82]'
} Bz&6kRPv
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} d&!;uzOx
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/* {F Ir|R&
**SiteInfoBean.java ~OuK ewr\
*/ !=C74$TH
package NetFox; wt8?@lJ"/
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public class SiteInfoBean { @
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private String sSiteURL; //Site's URL
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private String sFilePath; //Saved File's Path ,Z2fVz~9
private String sFileName; //Saved File's Name k&|#(1CFY
private int nSplitter; //Count of Splited Downloading File nnv&