/* i>Cxi ZT
**SiteFileFetch.java 2Qoj>Wy{
*/ A0NNB%4|/
package NetFox; a=55bEn
import java.io.*; ~~.v*C[
import java.net.*; C~2/ 5
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public class SiteFileFetch extends Thread { !
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SiteInfoBean siteInfoBean = null; //文件信息Bean dh7PpuN{
long[] nStartPos; //开始位置 !U,^+"l'GP
long[] nEndPos; //结束位置 -jZP&8dPH
FileSplitterFetch[] fileSplitterFetch; //子线程对象 /nK)esB1L
long nFileLength; //文件长度 bw@DcT&,
boolean bFirst = true; //是否第一次取文件 qM`XF32A$
boolean bStop = false; //停止标志 _{EO9s2FG
File tmpFile; //文件下载的临时信息 ez2 gy"
DataOutputStream output; //输出到文件的输出流 nP9@yI*7
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ;%1ob f 89
public SiteFileFetch(SiteInfoBean bean) throws IOException [;c'o5M&
{ a0"gt"qA
siteInfoBean = bean; C?n3J
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 1MtvnPY
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); W#<&(s4
if(tmpFile.exists ())
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{ $jYwV0
bFirst = false; ub"(,k P
read_nPos(); 5XNIX)H
} 3:$hC8
else !b O8apn
{ JJnZbJti
nStartPos = new long[bean.getNSplitter()]; SL;\S74
nEndPos = new long[bean.getNSplitter()]; 0Fw0#eE
} Ozk^B{{o
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} :E|HP#iwu
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public void run() ObC
{ <v?9:}
//获得文件长度 )x.}B4z
//分割文件 k_9tz}Z
//实例FileSplitterFetch U.oxLbJ`
//启动FileSplitterFetch线程 (~oUd4
//等待子线程返回 ]fXMp*LvY
try{ rK*s/mX <
if(bFirst) +#5nk,1c>
{ j+3~
nFileLength = getFileSize(); 9=&e5Oq}
if(nFileLength == -1) ?Z @FxW
{ XA~Rn>7&H
System.err.println("File Length is not known!"); <z N
} S;$@?vF
else if(nFileLength == -2) 9.|+KIRb
{ d"nz/$
System.err.println("File is not access!"); j.$#10*:
} lz!F{mR
else s-eC' )w~E
{ 0s = h*"[
for(int i=0;i<nStartPos.length;i++) iTU8WWY<
{ JMu|$"o&{
nStartPos = (long)(i*(nFileLength/nStartPos.length)); %S8e:kc6
} UA[2R1}d
for(int i=0;i<nEndPos.length-1;i++) ,\;;1Kq
{ 'Y+AU#1~H
nEndPos = nStartPos[i+1]; ?lv{;4BC
} &\] [:kG;
nEndPos[nEndPos.length-1] = nFileLength; 9?r|Y@xh ]
} \5^#5_<
} lKs*KwG
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//启动子线程 ~R.8r-kD`
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; B&0^3iKFi
for(int i=0;i<nStartPos.length;i++) b .k
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{ 65VnH=
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), *LeFI%
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 3A k,M-Jp
nStartPos,nEndPos,i); ~V?O%1)k?\
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9Ot;R?>(
fileSplitterFetch.start(); U">D_ 8
} TX]4Y953D
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), PY:
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); "U34D1I)#
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", }N5>^y
nEndPos = " + nFileLength); 4NL TtK
// fileSplitterFetch[nPos.length-1].start(); "G P!]3t
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//等待子线程结束 AiSO|!<.N
//int count = 0; BQv+9(:fQB
//是否结束while循环
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boolean breakWhile = false; ?eT^gWX
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while(!bStop) 2%N$Y]
{ nBL7LocvR
write_nPos(); ~C<
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Utility.sleep(500); WO$PW`k
breakWhile = true; @L^2VVWk^
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for(int i=0;i<nStartPos.length;i++) _3h(R`VdWO
{ cTmoz.0
if(!fileSplitterFetch.bDownOver) s;q]:+#7g
{ xA]CtB*o7
breakWhile = false; <CJua1l\
break; gF1qZ=<
} vpx8GiV
} AwB ]0H
if(breakWhile) 1?"vKm
break; C$\|eC j
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//count++; l2>G +t (,
//if(count>4) ^8aj\xe(
// siteStop(); _{&znXf>?6
} _n_lO8mK
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System.err.println("文件下载结束!"); 6}
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} ?:Y{c#w>
catch(Exception e){e.printStackTrace ();} =?T\zLN=
} zJ7vAL
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//获得文件长度 ?hvPPEJf
public long getFileSize() j$^3
{ EtJyI&7VK
int nFileLength = -1; *7.!"rb8A
try{ Gvv~P3Dm
URL url = new URL(siteInfoBean.getSSiteURL()); (E59)z -
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3N(s)N_P M
httpConnection.setRequestProperty("User-Agent","NetFox"); p>=YPi/d
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int responseCode=httpConnection.getResponseCode(); lDO9GNz$
if(responseCode>=400) 4&)*PKq
{ ]uX'[Z}t
processErrorCode(responseCode); *}Zd QJL
return -2; //-2 represent access is error cBM
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} ),0_ C\
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String sHeader; +ZtqR
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for(int i=1;;i++) `C`CU?D
{ oEU %"
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); W$ #FM$U
//Utility.log(in.readLine()); D4<nS<8
sHeader=httpConnection.getHeaderFieldKey(i); Bp6jF2
if(sHeader!=null) v9INZ1# v
{ x)l}d3
if(sHeader.equals("Content-Length")) g}0}$WgH:
{ 1Vt7[L*
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); dON4r2-yC
break; qI\qpWS\
} CE-ySIa
} br+{23&1R#
else <i"U%Ds (
break; 4.7OX&L'G
} UvRa7[<y%%
} (Mhj-0xf$
catch(IOException e){e.printStackTrace ();} Ev%4}GwO4
catch(Exception e){e.printStackTrace ();} MFcN.M
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Utility.log(nFileLength); "0 \U>h
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return nFileLength; 1w'iD
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} ~F^=7oq
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//保存下载信息(文件指针位置) [>::@[
private void write_nPos() _aL:XKM
{ |;ycEB1
try{ :XcU @m
output = new DataOutputStream(new FileOutputStream(tmpFile)); 9d^o2Yo
output.writeInt(nStartPos.length); 5WgdgDb@L
for(int i=0;i<nStartPos.length;i++) DtG><g}[]
{ |1X^@
// output.writeLong(nPos); ~Y@(
output.writeLong(fileSplitterFetch.nStartPos); e4u$+
output.writeLong(fileSplitterFetch.nEndPos); He^+>XIam
} >/nS<y>
output.close(); VS@o_fUx)
} kX."|]
catch(IOException e){e.printStackTrace ();} E8J`7sa
catch(Exception e){e.printStackTrace ();} +Tc<|-qQn
} OsPx-|f
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//读取保存的下载信息(文件指针位置) *,{. oO9#
private void read_nPos() ;H/*%2
{ 2+
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try{ &^FCp'J-
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); iq-n(Rfw~
int nCount = input.readInt(); 2-j+-B|i
nStartPos = new long[nCount]; , .uu/qV}w
nEndPos = new long[nCount]; RzQ1Wq
for(int i=0;i<nStartPos.length;i++) 55MsF}p
{ 8:0QI kqk
nStartPos = input.readLong(); 3]WIN_h
nEndPos = input.readLong(); =_I2ek
} %/b?T]{
input.close(); frbKi _1
} ZXljCiNn+\
catch(IOException e){e.printStackTrace ();} 01}az~&;35
catch(Exception e){e.printStackTrace ();} j0^~="p%C
} n(l!T
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private void processErrorCode(int nErrorCode) Q
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{ SdBv?`u|g
System.err.println("Error Code : " + nErrorCode); D oX!P|*
} &0SX*KyI
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//停止文件下载 DxR__
public void siteStop() &H$
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{ c-3AzB#[
bStop = true; )a.Y$![
for(int i=0;i<nStartPos.length;i++) m619bzFlB
fileSplitterFetch.splitterStop(); jhrmQS
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} vt<r_&+ pJ
} UhYeyT
//负责部分文件的抓取 U(3+*'8r,1
**FileSplitterFetch.java /+pbO-r W*
*/ I>o+INb:
package NetFox; dawe!w!
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import java.io.*; K@Q_q/(%;
import java.net.*;
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public class FileSplitterFetch extends Thread { *,5V;7OR
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String sURL; //File URL @G[P|^B
long nStartPos; //File Snippet Start Position 0b+OB pqN
long nEndPos; //File Snippet End Position ~[dU%I>L^
int nThreadID; //Thread's ID 2Un~Iy
boolean bDownOver = false; //Downing is over 1OK,r`
boolean bStop = false; //Stop identical <DP_`[+C
FileAccessI fileAccessI = null; //File Access interface dqO!p6
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException X>:@`}bq
{ #XR<}OYcL
this.sURL = sURL;
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this.nStartPos = nStart; ]J+}WR
this.nEndPos = nEnd; YMOy6C
nThreadID = id; k v1q\
fileAccessI = new FileAccessI(sName,nStartPos);//定位 #\KSv
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} Q*}#?g
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public void run() U.is:&]E
{ VXXo\LQUU
while(nStartPos < nEndPos && !bStop) l|z
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{ ?9xaBWf
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try{ y
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URL url = new URL(sURL); 8Kt_irD
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ^IGutZov
httpConnection.setRequestProperty("User-Agent","NetFox"); eKi/Mt
String sProperty = "bytes="+nStartPos+"-"; n_\VG[f
httpConnection.setRequestProperty("RANGE",sProperty); 5!u.w
Utility.log(sProperty); w^Qb9vTa8
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InputStream input = httpConnection.getInputStream(); _Qg^>}]A1
//logResponseHead(httpConnection); \PU3{_G]
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byte[] b = new byte[1024]; DqyJ]}|
int nRead; FJKW=1=,
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) g3Q]W(F%$
{ X{zg-k(@
nStartPos += fileAccessI.write(b,0,nRead); //cj$}Rn!
//if(nThreadID == 1) HKr")K%
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); im{'PgiR
} yzr>]"o
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Utility.log("Thread " + nThreadID + " is over!"); .4Ob?ZS(
bDownOver = true; >ch{u{i6
//nPos = fileAccessI.write (b,0,nRead); {vYmK#}
} Dz/I"bZLC
catch(Exception e){e.printStackTrace ();} jV
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} <Z5ak4P
} KD?~ hpg
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//打印回应的头信息 d2lOx|jt
public void logResponseHead(HttpURLConnection con) k_%2Ok
{ b);Pw"_2
for(int i=1;;i++) RaT(^b(
{ n B4)%
String header=con.getHeaderFieldKey(i); y;Xb."e~
if(header!=null) sPY*2B
//responseHeaders.put(header,httpConnection.getHeaderField(header)); n^P=a'+
Utility.log(header+" : "+con.getHeaderField(header)); @/h_v#W
else %}jwuNGA
break; 9k8ftxB^
} -BUxQ8/,
} %^s;{aN*!
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public void splitterStop() N1$lG?
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{ 'U
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bStop = true; U ^1Xc#Ff
} ~01
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} OJ8 ac6cJ
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/* =g4^tIYq
**FileAccess.java "3o{@TdU
*//文件访问(定位,写) 2?YN8
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package NetFox; *Wk y#
import java.io.*; ,9<}V;(
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public class FileAccessI implements Serializable{ UwOZBF<
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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 yoa"21E$
RandomAccessFile oSavedFile; xLX<