/* /tt
**SiteFileFetch.java (''`Ce
*/
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package NetFox; aYPzN<"%
import java.io.*; EWqKd/
import java.net.*; hrcR"OZ~X
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public class SiteFileFetch extends Thread { 2@e<II2ha8
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SiteInfoBean siteInfoBean = null; //文件信息Bean +;cw<9%0
long[] nStartPos; //开始位置 Yj0Ss{Ep
long[] nEndPos; //结束位置 H3a}`3}U
FileSplitterFetch[] fileSplitterFetch; //子线程对象 U4LOe}Ny
long nFileLength; //文件长度 aNXu"US+Sp
boolean bFirst = true; //是否第一次取文件 %X[|7D-
boolean bStop = false; //停止标志 (V e[FhA
File tmpFile; //文件下载的临时信息 =BX<;vU
DataOutputStream output; //输出到文件的输出流 xhqIE3gd
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 6"A|)fz
public SiteFileFetch(SiteInfoBean bean) throws IOException 37lmB
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{ YJ!6)d?C.
siteInfoBean = bean; oz[E>%
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); \W1?Qc1]
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); $,h*xb.
if(tmpFile.exists ()) VnIJ$5Y
{ ^$x^JM ]/
bFirst = false; "2=v?,'t
read_nPos(); _/MKU!\l
} `7N[rs9|S
else C@Wm+E~;8
{ B~~rLo:a
nStartPos = new long[bean.getNSplitter()]; oPWvZI(\&
nEndPos = new long[bean.getNSplitter()]; .[O*bk
} }B0V$
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} rcQ?E=V2O
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public void run() V
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{ EW]gG@w]5r
//获得文件长度 g<.VW0
//分割文件 ?}lCS7&
//实例FileSplitterFetch ]qv/+~Qs>
//启动FileSplitterFetch线程 ?,s{M^sj^
//等待子线程返回 &OuyjW4
try{ t3bDi/m
if(bFirst) YQYN.\
{ BHFWig*{
nFileLength = getFileSize(); ~yO.R)4v
if(nFileLength == -1) V?5_J%
{ //6m2a
System.err.println("File Length is not known!"); y4envjl0
} ~'T]B{.+J
else if(nFileLength == -2) C(?lp
{ `9$?g|rB
System.err.println("File is not access!"); ^M?uv{354
} 4Q3Q.(
else A?6b)B/e?
{ 5(DCq(\P*
for(int i=0;i<nStartPos.length;i++) R8HA X
{ IlS{>6
nStartPos = (long)(i*(nFileLength/nStartPos.length)); |4-Ey! P
} ]>`Q"g~0
for(int i=0;i<nEndPos.length-1;i++) >:wk.<Z-
{ qtgj"4,:`
nEndPos = nStartPos[i+1]; LW,!B.`@
} dd$\Q
nEndPos[nEndPos.length-1] = nFileLength; wmT3 >
} nC`=quM9
} !5=3Y4bg1
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//启动子线程 rU'&o) a^
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 7 H<_
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for(int i=0;i<nStartPos.length;i++) cJH7zumM)
{ (cA=~Bw[=
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), QR^pu.k@
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 6NZf!7,B
nStartPos,nEndPos,i); &G'R{s&"
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); =@ON>SmPs
fileSplitterFetch.start(); *4.f*3*
} eH1Y!&`
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 2gFQHV
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); J/
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// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Uvz9x"0[u
nEndPos = " + nFileLength); :!aFfb["
// fileSplitterFetch[nPos.length-1].start(); (1TYJ. Z
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//等待子线程结束 Cf%)W:Q9
//int count = 0; L(X:=)
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//是否结束while循环 s!UC{)g,
boolean breakWhile = false; dn5T7a~
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while(!bStop) @c.QrKSaD
{ Xv'64Nc!;
write_nPos(); tc#
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Utility.sleep(500); guf+AVPno
breakWhile = true; ~%GUc
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for(int i=0;i<nStartPos.length;i++) A}oR,$D-
{ cvc.-7IO
if(!fileSplitterFetch.bDownOver) 'MC)%N,
{ 47t^{WrT
breakWhile = false; 9N-mIGJ
break; LWIU7dw
} jPbL3"0A&
} eQYW>z'%,
if(breakWhile) a:P%
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break; C0kwI*)
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//count++; x#pTB.
//if(count>4) m4kmJaM
// siteStop(); _u.l|yR
} cL`l1:j\}
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System.err.println("文件下载结束!"); #>!!#e!*
} EV~_-YC
catch(Exception e){e.printStackTrace ();} WlG/7$
} Zb}=?fcL;@
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//获得文件长度 R=PjLH&)
public long getFileSize() i%-c/ lop
{ Q@l3XNH|c
int nFileLength = -1; ^>]p4Q3 6
try{ bD49$N?>
URL url = new URL(siteInfoBean.getSSiteURL()); u6|7P<HUfb
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "esV#%:#J
httpConnection.setRequestProperty("User-Agent","NetFox"); iUSs) []H>
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int responseCode=httpConnection.getResponseCode(); ]l&_Pv!!
if(responseCode>=400) YMm Fpy
{ =FdS'<GM
processErrorCode(responseCode); S* <:He&1
return -2; //-2 represent access is error oBIKtS*L
} ~9x$tb x-
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String sHeader; IWKQU/l!
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for(int i=1;;i++) 9g "?`_
{ _.\p^ HM
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); NlWIb2,
//Utility.log(in.readLine()); \}G/F!
sHeader=httpConnection.getHeaderFieldKey(i); D(L%fK` +
if(sHeader!=null) %hOe `2#$
{ &{l?j>|TM
if(sHeader.equals("Content-Length")) Vx?a&{3]-
{ .!=2#<
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); wVw3YIN#
break; _`ot||J
} ?l
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} r=s2wjk
else |8V+(Vzl
break; \W#M]Q
} MheP@ [w|@
} 8]+hfB/
catch(IOException e){e.printStackTrace ();} 8+
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catch(Exception e){e.printStackTrace ();} U%U%a,rA5s
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Utility.log(nFileLength); +=;F vb
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return nFileLength; \>M3E
} -pyTzC$HO
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//保存下载信息(文件指针位置) h<.&,6R
private void write_nPos() M%yT?R+
{ E}4R[6YD
try{ E+F!u5u
output = new DataOutputStream(new FileOutputStream(tmpFile)); 1^Ci$ra
output.writeInt(nStartPos.length); 6|["!AUI
for(int i=0;i<nStartPos.length;i++) Z*x Q"+\
{ i>>_S&!9p
// output.writeLong(nPos); p\F*Y,4
output.writeLong(fileSplitterFetch.nStartPos); :/d#U:I
output.writeLong(fileSplitterFetch.nEndPos); #L[Atx
} l.Qj?G
output.close(); yv]/A<gP+
} @
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catch(IOException e){e.printStackTrace ();} 7$}lkL
catch(Exception e){e.printStackTrace ();} EXoT$Wt{$
} 53@*GXzE
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//读取保存的下载信息(文件指针位置) +-K-CXt
private void read_nPos() YG!~v~sV
{ oTT/;~ I
try{ S'vrO}yU
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); )0~zL} )?
int nCount = input.readInt(); gz
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nStartPos = new long[nCount]; 7s1FJm=Y/
nEndPos = new long[nCount]; @My-O@C>
for(int i=0;i<nStartPos.length;i++) op/|&H'
{ -h8A<
nStartPos = input.readLong(); @6(4}&sEdm
nEndPos = input.readLong(); >o%.`)Ar
} *8t_$<'dQ
input.close(); S0,p:Wey
} b&s"x?
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catch(IOException e){e.printStackTrace ();} Wyw/imr
catch(Exception e){e.printStackTrace ();} ~Wf&$p<|
} VuPa'2
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private void processErrorCode(int nErrorCode) MG<F.u
{ /87?U; |V
System.err.println("Error Code : " + nErrorCode); 7[.aAGTZ;
} }&bO;o&>
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//停止文件下载 Pur~Rz\\
public void siteStop() OZB(4{vnyC
{ )zf&`T
bStop = true; h/mmV:v
for(int i=0;i<nStartPos.length;i++) pa`"f&JO
fileSplitterFetch.splitterStop(); _.KKh62CN
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} D/5 ah_;
} .|G([O^H
//负责部分文件的抓取 vB
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**FileSplitterFetch.java ~$Xz~#~
*/ XcAx@CY9c
package NetFox; XFUlV;ek
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import java.io.*; eR$qw#%c*
import java.net.*; 2I3MV:5
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public class FileSplitterFetch extends Thread { EuOrwmdj
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String sURL; //File URL & w&JE]$ 5
long nStartPos; //File Snippet Start Position o $7:*jU
long nEndPos; //File Snippet End Position ifHQ2Ug9
int nThreadID; //Thread's ID #/=s74.b
boolean bDownOver = false; //Downing is over q@1b{q#C5
boolean bStop = false; //Stop identical rF'_YYpr>
FileAccessI fileAccessI = null; //File Access interface AvfSR p
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException |:7O
{ :70[zo7n'
this.sURL = sURL; nYhI0q
this.nStartPos = nStart; W|XW2`3p
this.nEndPos = nEnd; 7O',X Y
nThreadID = id; 8eCC
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fileAccessI = new FileAccessI(sName,nStartPos);//定位 JPJ&k(P
} 0<d9al|J
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public void run() ]q~_
{ G6]W'Kk
while(nStartPos < nEndPos && !bStop) !VBl/ aU@
{ X,DG2HT
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try{ >rJ9^rS
URL url = new URL(sURL); mwU|Hh)N]
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !6{; z/Hy
httpConnection.setRequestProperty("User-Agent","NetFox"); 5 YjqN
String sProperty = "bytes="+nStartPos+"-"; %#kml{I
httpConnection.setRequestProperty("RANGE",sProperty); *DfwTbg|
Utility.log(sProperty); (1Q G]1q
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InputStream input = httpConnection.getInputStream(); 6b`3AAGU"
//logResponseHead(httpConnection); ebsZ
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byte[] b = new byte[1024]; 4BF
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int nRead; L+VqTt
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) )nE=H,U?y
{ \JjZ _R
nStartPos += fileAccessI.write(b,0,nRead); G(joamfM
//if(nThreadID == 1) i286 J.
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); hq+j8w}<-
} }h{8i_R
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Utility.log("Thread " + nThreadID + " is over!"); 4k%y*L
bDownOver = true; jMFLd
//nPos = fileAccessI.write (b,0,nRead); G)5R
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} sKDsps^$
catch(Exception e){e.printStackTrace ();} d7(g=JK<
} uknX py))
} &gGh%:`B
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//打印回应的头信息 55LW[Pc
public void logResponseHead(HttpURLConnection con) @s7ZfV??
{ rx[l7F
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for(int i=1;;i++) [9N>*dKB
{ !C]2:+z-MF
String header=con.getHeaderFieldKey(i); lJlyfN
if(header!=null) H 5\k`7R
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 5 1&||.
Utility.log(header+" : "+con.getHeaderField(header)); olLVT<
else q%&JAX=
break; X"hdCY%
} pb8sx1.j;
} 9feVy\u
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public void splitterStop() LeP;HP|
{ *m$lAWB5D
bStop = true; nLvF^%P8
} 9pF@#A9p
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} ECW=865jL
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/* L[s7q0 F`l
**FileAccess.java z:gp\
*//文件访问(定位,写) "2m (*+
package NetFox; 'aV/\a:*
import java.io.*; NQ&\t[R[
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public class FileAccessI implements Serializable{ U=ek_FO
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Qvc$D{z
RandomAccessFile oSavedFile; 3fBV
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long nPos; *Rx&