/* WD5J2EePT
**SiteFileFetch.java <Gpji5f2
*/ U4XW
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package NetFox; s|C[{n<_
import java.io.*; o30C\
import java.net.*; 0/HFLz'
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public class SiteFileFetch extends Thread { [?K>s>it
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SiteInfoBean siteInfoBean = null; //文件信息Bean pRQ7rT',v
long[] nStartPos; //开始位置
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long[] nEndPos; //结束位置 ~5
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FileSplitterFetch[] fileSplitterFetch; //子线程对象 )>@S8v,(
long nFileLength; //文件长度 ]_C"A
boolean bFirst = true; //是否第一次取文件 ns~]a:1yh
boolean bStop = false; //停止标志 ?%3dgQB'
File tmpFile; //文件下载的临时信息 ; Z:[LJd
DataOutputStream output; //输出到文件的输出流 YsmRY=3
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) bPVk5G*ruP
public SiteFileFetch(SiteInfoBean bean) throws IOException 461g7R%r
{ 8063LWV
siteInfoBean = bean; ("U<@~
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); JrcbJt
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); b1Vr>:sK47
if(tmpFile.exists ()) 4,y7a=qf3
{ l~J d>9DwY
bFirst = false; !Yof%%m$;
read_nPos(); 4/
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} r<!hEWO>v
else Fk=SkSky
{ ;nSF\X(;{
nStartPos = new long[bean.getNSplitter()]; 7z?;z<VJ
nEndPos = new long[bean.getNSplitter()]; |d0ZB_ci
} B*tYp
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} @c^ Dl
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public void run() W&5/1``u\
{
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//获得文件长度 m%0-3c(
//分割文件 '0Cp
//实例FileSplitterFetch ,HP }}K+S
//启动FileSplitterFetch线程 }=X: F1S
//等待子线程返回 o`f^ m
try{ q|*^{(tWs
if(bFirst) 3(e_2v
{ NP;W=A F
nFileLength = getFileSize(); 0AHQ(+Ap
if(nFileLength == -1) 5L3+KkX@
{ ^PEw#.WG
System.err.println("File Length is not known!"); [ar0{MPYd
} j(%N.f6
else if(nFileLength == -2) VAiJL
{ 1.14tS-}[4
System.err.println("File is not access!"); w_{tS\
} Qvp"gut)%X
else JuO47}i] 5
{ ~,/@]6S&Y
for(int i=0;i<nStartPos.length;i++) I)mB]j
{ :)1"yo\
nStartPos = (long)(i*(nFileLength/nStartPos.length)); \%<M[r=
} F! =l
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for(int i=0;i<nEndPos.length-1;i++) +W4}&S
{ OZ\6qMH3e
nEndPos = nStartPos[i+1]; ",,# q
} Mj;V.Y
nEndPos[nEndPos.length-1] = nFileLength; m*m),mZ"
} -,bnj^L
} 811>dVq3/
#gbB// <
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//启动子线程 `XxnQng
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; @v2<T1UC
for(int i=0;i<nStartPos.length;i++) EHUx~Q
{ { b$"SIg1E
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {R_>KE1
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), TAXsL&Tz>
nStartPos,nEndPos,i); 6+$2rS$1V
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -;9
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fileSplitterFetch.start(); J+/}m}bx
} *73gp
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), c'2/ C5
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ujV{AF`JfB
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ]s=|+tz\V
nEndPos = " + nFileLength); ;TL.QN/l
// fileSplitterFetch[nPos.length-1].start(); `<9>X9.+
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//等待子线程结束 H9)@q3<
//int count = 0; PCl5,]B}
//是否结束while循环 _)45G"M
boolean breakWhile = false; O|H:
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while(!bStop) Et3]n$
{ /x49!8
write_nPos(); (H_dZL
Utility.sleep(500); '?C6P5fm
breakWhile = true; uo`R
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for(int i=0;i<nStartPos.length;i++) brA#p>4]Wf
{ g, d_
if(!fileSplitterFetch.bDownOver) u=0O3-\h
{ &D3]O9a0;
breakWhile = false; &3SS.&g4W
break; IHTimT?
} *
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} vX:}tir[
if(breakWhile) h
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break; _r-LX"
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//count++; g`pq*D
//if(count>4) |mtW)
// siteStop(); ZxvH1qx8
} h:fiUCw
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System.err.println("文件下载结束!"); dWd%>9}
} S1$^ _S
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catch(Exception e){e.printStackTrace ();} +@ChZ
} %"`p&aE:
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//获得文件长度 FQ>$Ps*a[
public long getFileSize() ]ogifnwv
{ t/[lA=0 )2
int nFileLength = -1; yv-R<c!'
try{ ebze_:
URL url = new URL(siteInfoBean.getSSiteURL()); +iC:/CJL
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); }T[@G6#
httpConnection.setRequestProperty("User-Agent","NetFox"); kx&JY9(
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int responseCode=httpConnection.getResponseCode(); \=0;EI-j
if(responseCode>=400) ]1++$Ej
{ )|*Qs${tF
processErrorCode(responseCode); o^epXIrIPi
return -2; //-2 represent access is error
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} *5Zow 3
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String sHeader; \d"\7SA
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for(int i=1;;i++) Bj7*2}
{ +,spC`M6h
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); N1'"7eg/
//Utility.log(in.readLine()); ^ = C>
sHeader=httpConnection.getHeaderFieldKey(i); #czInXTTx
if(sHeader!=null) jzf~n~
{ !l*A3qA
if(sHeader.equals("Content-Length")) ,g?ny<#o
{ p8,=K<
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); k1,k 9BK
break; 30HUY?'K
} A"S"La%"
} ]\yB,
else >n,_Aj
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break; Q+1ot,R
} 8fqabR
} wKpGJ&
{
catch(IOException e){e.printStackTrace ();} .OJGo<#$f
catch(Exception e){e.printStackTrace ();} 0se%|Z|8
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Utility.log(nFileLength); r $S9/
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return nFileLength; g/C 7wc
} |&@q$d
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//保存下载信息(文件指针位置) OmuE l>
private void write_nPos() :Pq&l.
{ "1s ]74
try{ $2Wk#F2c=
output = new DataOutputStream(new FileOutputStream(tmpFile)); =\]gL%N-|
output.writeInt(nStartPos.length); w5z]=dN
for(int i=0;i<nStartPos.length;i++) `)a|Q
{ 4&NB xe
// output.writeLong(nPos); TzC(YWt
output.writeLong(fileSplitterFetch.nStartPos); ,P<I<QYu
output.writeLong(fileSplitterFetch.nEndPos); _ %mm
} !po,Z&
output.close(); Mh`^-*c?
} 7ZI{A*^vB
catch(IOException e){e.printStackTrace ();} u8 k^\Do
catch(Exception e){e.printStackTrace ();} I0Do%
} p+P@I7V
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//读取保存的下载信息(文件指针位置) k?h{6Qd
private void read_nPos() Mzg3i*
{ \zJ^XpC
try{ ^:?z7m
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ?e-rwaW
int nCount = input.readInt(); SsX$l<t*
nStartPos = new long[nCount]; ( &m1*
nEndPos = new long[nCount]; 5tv*uz|fv
for(int i=0;i<nStartPos.length;i++) L\ysy2E0
{ s-*N_Dv
nStartPos = input.readLong(); _dd_Z40R
nEndPos = input.readLong(); KdR\a&[MA
} %enJ[a%Qg
input.close(); ` .`:~_OE
} ~6#mVP5sU)
catch(IOException e){e.printStackTrace ();} ZS:[ZehF
catch(Exception e){e.printStackTrace ();} S*}GW-)oA
} 9>+>s ?IgK
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private void processErrorCode(int nErrorCode) |g7)A?2J~
{ 9I 6^-m@:
System.err.println("Error Code : " + nErrorCode); Mxz
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} 4oF,;o+v\4
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//停止文件下载 2;]tIt d1
public void siteStop() lJa-O
{ _`Kh8G
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bStop = true; 'NWvQR<X
for(int i=0;i<nStartPos.length;i++) BfCib]V9C
fileSplitterFetch.splitterStop(); =SJ[)|
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} ZHen:
} N+SA$wG
//负责部分文件的抓取 Q9y|1Wg1W
**FileSplitterFetch.java iP7KM*ks
*/ e7G>'K
package NetFox; /_fZ2$/
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import java.io.*; Ct/6<
import java.net.*; @W+8z#xr'
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public class FileSplitterFetch extends Thread { m$Tt y[0
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String sURL; //File URL }J5iY0
long nStartPos; //File Snippet Start Position /x-tl)(s=
long nEndPos; //File Snippet End Position ICo Z<;p
int nThreadID; //Thread's ID L%9yFg%u
boolean bDownOver = false; //Downing is over avS9 "e
boolean bStop = false; //Stop identical 6w<p1qhW
FileAccessI fileAccessI = null; //File Access interface UL7%6v{'*
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException p*P0<01Z
{ 7;}TNK\+v
this.sURL = sURL; UIQ=b;J9
this.nStartPos = nStart; *|+ ~V/#
this.nEndPos = nEnd; n=fR%<v
nThreadID = id; }xrrHp
fileAccessI = new FileAccessI(sName,nStartPos);//定位 <.7W:s,f=
} RkdAzv!Y7
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public void run() `Geq,
{ 0@f7`D
while(nStartPos < nEndPos && !bStop) ,Ur~DXY
{ B7ys`eiB5C
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{
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try{ 7f=9(Zj
URL url = new URL(sURL); -JF|770i
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Qzk/oHs
httpConnection.setRequestProperty("User-Agent","NetFox"); A[d'*n[
String sProperty = "bytes="+nStartPos+"-"; X>jwjRK
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httpConnection.setRequestProperty("RANGE",sProperty); q33!X!br
Utility.log(sProperty); r52,f%nlm
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InputStream input = httpConnection.getInputStream(); qpc2;3*7
//logResponseHead(httpConnection); OaxE3bDT
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byte[] b = new byte[1024]; Q^V`%+
int nRead; r3 {o_w
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) w_J`29uc
{ "=!QSb
nStartPos += fileAccessI.write(b,0,nRead); {&(bKQ
//if(nThreadID == 1) ]O&A:Us
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); +ACV,GG
} ;v+CQx
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Utility.log("Thread " + nThreadID + " is over!");
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bDownOver = true; J=]w$e ?.P
//nPos = fileAccessI.write (b,0,nRead); 8CSvg{B
} !c`Q?aGV)
catch(Exception e){e.printStackTrace ();} zsRN\U
} R}+/jh2O|
} XKU=VOY
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//打印回应的头信息 |V~P6o(/
public void logResponseHead(HttpURLConnection con) *&2#;mf3
{ GrQAho
for(int i=1;;i++) <db/. A3
{ t_VHw'~"
String header=con.getHeaderFieldKey(i); E[Io8|QA
if(header!=null) %J%gXk}]
//responseHeaders.put(header,httpConnection.getHeaderField(header)); :~)Q] G1Nj
Utility.log(header+" : "+con.getHeaderField(header)); $v oyXi`*
else RBgkC+2
break; izWl5}+'B
} 3S2'JOTY
} |]\bgh
+[}]a3)
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public void splitterStop() zB]T5]
{ ;<X3AhF
bStop = true; '}YXpB
} K
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} E:E&Wv?r
# nYGKZ
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/* qiF~I0_0
**FileAccess.java t@ JPnA7~
*//文件访问(定位,写) H62*8y8
package NetFox; X9gC2iSs]
import java.io.*; Z "=(uwM
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public class FileAccessI implements Serializable{ y?@Y\ b
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 B+DRe 8
RandomAccessFile oSavedFile; \j;uN#)28
long nPos; cnPXvD^kY
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public FileAccessI() throws IOException 5)oIPHXw
{ B:r-')!0$#
this("",0); "=n8PNV/
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} ;Gs**BB&
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public FileAccessI(String sName,long nPos) throws IOException @
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{ pNJM]-D]m~
oSavedFile = new RandomAccessFile(sName,"rw"); 9cmJD5OO
this.nPos = nPos; +?:V\niQI
oSavedFile.seek(nPos); \
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} l>(G3lIw
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public synchronized int write(byte[] b,int nStart,int nLen) ge oN4
{ _Usg`ax-
int n = -1;
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try{ `j<tI6[e
oSavedFile.write(b,nStart,nLen); ?^vZ{B)&0E
n = nLen; f,a %@WT
} Lb{D5k*XU
catch(IOException e) y&Hh8|'mC
{ OA=;9AcZ
e.printStackTrace (); ?.4l1X6Ba
} ibc/x v2
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return n; feW9>f;
} E\S&} K,s
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