/* ;n;^f&;sJ
**SiteFileFetch.java 4{vd6T}V!
*/ f]'@Vt>
package NetFox; 34oLl#q*
import java.io.*; D@^F6am%
import java.net.*; bg
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public class SiteFileFetch extends Thread { Rm*}<JN31
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SiteInfoBean siteInfoBean = null; //文件信息Bean `>sqP aD
long[] nStartPos; //开始位置 DYWC]*
long[] nEndPos; //结束位置 N6J$z\
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FileSplitterFetch[] fileSplitterFetch; //子线程对象 ]JD$fS=_
long nFileLength; //文件长度 hL`zV
boolean bFirst = true; //是否第一次取文件 uf;q/Wr
boolean bStop = false; //停止标志 *b)b#p
File tmpFile; //文件下载的临时信息 '!.;(Jo
DataOutputStream output; //输出到文件的输出流 6#KI?
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) *cf"l
public SiteFileFetch(SiteInfoBean bean) throws IOException 8zc!g|5"
{ uWWv`bI>x
siteInfoBean = bean; Un/fP1
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); %7d"()L
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); n21$57`4
if(tmpFile.exists ()) (t]>=p%4g
{ wi9|
bFirst = false; *n*y!z
read_nPos(); zl:D|h77
} 9#(QS+q~
else
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{ Hxl,U>za#
nStartPos = new long[bean.getNSplitter()]; o(``7A@7a
nEndPos = new long[bean.getNSplitter()]; RE .@ +A
} 9/$P_Q:3
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} iTt=aQjd
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public void run() <!N;(nZ9}O
{ =CVT8(N*
//获得文件长度 hX_p5a1t
//分割文件 A pjqSz"
//实例FileSplitterFetch Q$vr`yV#=6
//启动FileSplitterFetch线程 9(l'xu X
//等待子线程返回 =_dd4`G&<
try{ cP2R24th
if(bFirst) 8QN8bGxK
{ d*>k
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nFileLength = getFileSize(); Yy)a,clZ*$
if(nFileLength == -1)
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{ Zd(d]M_x
System.err.println("File Length is not known!"); ^d9raYE`'
} 668bJ.M\O
else if(nFileLength == -2) c_q+_$t
{ M([H\^\:
System.err.println("File is not access!"); ~yi&wbTjM
} \!QF9dP4
else 5lxq-E3
{ z{g<y^Im+E
for(int i=0;i<nStartPos.length;i++) I7PWOd
{ 9AYe,R
nStartPos = (long)(i*(nFileLength/nStartPos.length)); @c!67Z
} L%d?eHF
for(int i=0;i<nEndPos.length-1;i++) 12PE{Mut
{ lDU:EJ&DHE
nEndPos = nStartPos[i+1]; h<K;VpL6
} N ]7a=
nEndPos[nEndPos.length-1] = nFileLength; -HsBV>C
} iFCH$!
} (<C%5xk
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//启动子线程 0:Y`#0qK
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; <u?hdwW\
for(int i=0;i<nStartPos.length;i++) \.1b\\
{ #@6L|$iX
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), N`Xnoehu
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Cj1UD;
nStartPos,nEndPos,i); B^(rUR
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *wB-lg7%
fileSplitterFetch.start(); ,A!e"=HF
} b<(UmRxx3
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), jN}7BbX
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ePpK+E[0Z
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ~9 WJrRWB
nEndPos = " + nFileLength); 3t8H?B12ow
// fileSplitterFetch[nPos.length-1].start(); /Z "
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//等待子线程结束 aaugu.9
//int count = 0; ]A]E)*
//是否结束while循环 70
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boolean breakWhile = false; RpK,ixbtA+
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while(!bStop) ~}0hN]*G
{ .&x?`pER
write_nPos(); -mHhB(Td'
Utility.sleep(500); z{3%Hq
breakWhile = true; /Tf*d>Yh;
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for(int i=0;i<nStartPos.length;i++) q&$0i
{ CotMV^
if(!fileSplitterFetch.bDownOver) y [9}[NMZ
{ A%*DQ1N
breakWhile = false; To8v#.i
break; }Q=se[((
} M}oj!xGB
} c^Gwri4
if(breakWhile) N"x\YHp
break; ms\/=96F
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//count++; (bFWT_CChz
//if(count>4) i)= 89?8
// siteStop(); l6B ^sc*@
} gqdB!l4
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System.err.println("文件下载结束!"); eN<pU%7
} \m~\,em
catch(Exception e){e.printStackTrace ();} jbhJ;c :
} x\bR j>%(
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//获得文件长度 G2+)R^FSC
public long getFileSize() D@(M+u9/%
{ v*'iWHCl,
int nFileLength = -1; ioY\8i
try{ S7NnC4)=-f
URL url = new URL(siteInfoBean.getSSiteURL()); BQuliX&
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 8@W/43K8-
httpConnection.setRequestProperty("User-Agent","NetFox"); `^bvj]>l
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int responseCode=httpConnection.getResponseCode(); (_&V9vat=
if(responseCode>=400) (-'0g@0UA
{ 1[/$ZYk:
processErrorCode(responseCode); d[RWkk5
return -2; //-2 represent access is error n|mJE,N
} :YJ7J4
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String sHeader; ,4>WLJDo
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for(int i=1;;i++) 6KCCbg/
{ :&1=8^B Y
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); nA_
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//Utility.log(in.readLine()); A D}}>v
sHeader=httpConnection.getHeaderFieldKey(i); kk/+Vx~
if(sHeader!=null) %j[LRY/
{ nhQ44qRgQ
if(sHeader.equals("Content-Length")) AeY$.b
{ Bsu=^z
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ! F;<xgw
break; D=82$$
} RdvPsv}D
} y800(z
else S QM(8*:X
break; *t?~)o7
} J+cAS/MYX
} SZK)q
catch(IOException e){e.printStackTrace ();} 4gv.E 0Fo
catch(Exception e){e.printStackTrace ();} yYG3/Z3u5
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Utility.log(nFileLength); u_p7Mcb
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return nFileLength; hP4)8 >
} rAlh&
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//保存下载信息(文件指针位置) ET,0ux9F
private void write_nPos() %Vw|5yA4
{ X@bn??
try{ QWzOp\+
output = new DataOutputStream(new FileOutputStream(tmpFile)); .o\;,l2
output.writeInt(nStartPos.length); \`P2Yq
for(int i=0;i<nStartPos.length;i++) clq~ ;hx
{ 9+'@
// output.writeLong(nPos); M}=s3[d(,
output.writeLong(fileSplitterFetch.nStartPos); h+B'_`(
output.writeLong(fileSplitterFetch.nEndPos); 5D]30
} l`v
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output.close(); _>gXNS r4u
} '&.)T2Kw
catch(IOException e){e.printStackTrace ();} g:uvoMUD
catch(Exception e){e.printStackTrace ();} a+YR5*&[OO
} 9zoT6QP4
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//读取保存的下载信息(文件指针位置) rR,+G%[(=4
private void read_nPos() F=-uDtQ<N
{ (^DLCP#*
try{ WA]%,6
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile));
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int nCount = input.readInt(); F_Z&-+,*3t
nStartPos = new long[nCount]; b(.-~c('
nEndPos = new long[nCount]; Xr@l+zr
for(int i=0;i<nStartPos.length;i++) e(OwS?K
{ D4=..;
nStartPos = input.readLong(); Ism^hyL
nEndPos = input.readLong(); S+) l[0
} ?AeHVQ
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input.close(); PwFQ #Z
} zp7V\W;
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catch(IOException e){e.printStackTrace ();} :rz9M@7
catch(Exception e){e.printStackTrace ();} 3~[`[4n^
} 1a($8>
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private void processErrorCode(int nErrorCode) S s@u,`pr
{ Xmap9x
System.err.println("Error Code : " + nErrorCode); ] ?DDCew
} Q(~3pt
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//停止文件下载 <mv7HKVg
public void siteStop() Je#!Wd
{ #dva0%-1
bStop = true; /<3;0~#){
for(int i=0;i<nStartPos.length;i++) j!zA+hF(
fileSplitterFetch.splitterStop(); g,t3OnxS?
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} ?1GY%-
} ^lHb&\X
//负责部分文件的抓取 1fz*SIjG
**FileSplitterFetch.java ;;EDN45
*/ wF|0n t
package NetFox; pP|,7c5
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import java.io.*; !cq=)xR
import java.net.*; "C_T]%'Wm
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public class FileSplitterFetch extends Thread { P'a0CE%
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String sURL; //File URL t{/hkXq]
long nStartPos; //File Snippet Start Position pwJ'3NbS
long nEndPos; //File Snippet End Position ZWf-X
int nThreadID; //Thread's ID :y=!{J<
boolean bDownOver = false; //Downing is over k_,MoDz
boolean bStop = false; //Stop identical 5h_<R!jA
FileAccessI fileAccessI = null; //File Access interface 4`'8fe/"
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException z=ML(1c=
{ OJ v}kwV
this.sURL = sURL; lp,\]]
this.nStartPos = nStart; RY9+ 9i
this.nEndPos = nEnd; Hu<p?mF#
nThreadID = id; BX@pt;$ek7
fileAccessI = new FileAccessI(sName,nStartPos);//定位 285_|!.Y
} w-
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public void run() 1a<]$tZk
{ J__;.rnk
while(nStartPos < nEndPos && !bStop) ykxbX
{ ,VPbUo@
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try{ ,`;jvY~Ec
URL url = new URL(sURL); RS'} nY}
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); HR;/Br
httpConnection.setRequestProperty("User-Agent","NetFox"); 1s Br.+p
String sProperty = "bytes="+nStartPos+"-"; D+f'*|
httpConnection.setRequestProperty("RANGE",sProperty); o:_^gJ+|
Utility.log(sProperty); sT)6nV
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InputStream input = httpConnection.getInputStream(); Q(lku"U'
//logResponseHead(httpConnection); Yx6hA#7I
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byte[] b = new byte[1024]; 3@&bxYXm
int nRead;
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while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) |</"N-#S
{ s0r"N7~
nStartPos += fileAccessI.write(b,0,nRead); ([Ebsj
//if(nThreadID == 1) fGb7=Fk
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); I[ai:
} Z)/6??/R
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Utility.log("Thread " + nThreadID + " is over!"); =K:(&6f<t
bDownOver = true; \ZS\i4
//nPos = fileAccessI.write (b,0,nRead); [!G)$<
} 4RhR[
catch(Exception e){e.printStackTrace ();} +)gGs#2X
} Wdo#?@m
} (zY * 0lN
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//打印回应的头信息 M:_!w[NiLp
public void logResponseHead(HttpURLConnection con) Xtft*Z
{ 5^>n5u/
for(int i=1;;i++) ^OF5F8Tf/
{ r:-WzH(Ms
String header=con.getHeaderFieldKey(i); NH'iR!iGo
if(header!=null) mG_BM/$
//responseHeaders.put(header,httpConnection.getHeaderField(header)); <{giHT
Utility.log(header+" : "+con.getHeaderField(header)); Rvvh{U;t
else `|]e6Pb
break; }'lNi^"XL
} Q!K`e )R
} [G a~%m
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public void splitterStop() ,>u=gA&}
{ " \:ced
bStop = true; &s:=qQa1
} @;m$ua*|:
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} ~n6[$WjZA
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/* >dk9f}7-
**FileAccess.java ('t kZt%8
*//文件访问(定位,写) >!}`%pk(
package NetFox; QsOhz
import java.io.*; -l
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public class FileAccessI implements Serializable{ vBNZ<L\|a
}~Q5Y3]#~
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 J3G7zu8
RandomAccessFile oSavedFile; _UkmYZ/
long nPos; )r9b:c\
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public FileAccessI() throws IOException cOkgoL" 4
{ c&f
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this("",0); !%xP}{(7
} ' "'Btxz
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public FileAccessI(String sName,long nPos) throws IOException "!H@k%eAM|
{ se!mb _!
oSavedFile = new RandomAccessFile(sName,"rw"); Q.k
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this.nPos = nPos; /s
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oSavedFile.seek(nPos); ]>Si0%
} i[150g?K
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public synchronized int write(byte[] b,int nStart,int nLen) Z)&D`RCf
{ =-~;OH/
int n = -1; EA|k5W*b
try{ (R'+jWH
oSavedFile.write(b,nStart,nLen); Fk1.iRVzi
n = nLen; |;u}sX1t9
} s-k_d<
catch(IOException e) z<pJYpxH
{ \cQ .|S
e.printStackTrace (); gWrAUPS[
} %y"J8;U
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return n; xNpg{cQ=
} Bf]$X>d
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} 5|w&dM
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/* }"zC
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**SiteInfoBean.java }q!_!q,@
*/ E=u/tpj
package NetFox; ;;V\"7q'
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public class SiteInfoBean { H"CUZ
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private String sSiteURL; //Site's URL A+
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private String sFilePath; //Saved File's Path E'c%d[:H,
private String sFileName; //Saved File's Name ;=jr0\| e
private int nSplitter; //Count of Splited Downloading File &|5GB3H=
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#
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public SiteInfoBean() Cd]/
{//nSplitter的缺省值为5 GBP-V66
//default value of nSplitter is 5 ._CP%
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this("","","",5); ?4[H]BK
} :\yc*OtX
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) pCU*@c!
{ I^3:YVR&
sSiteURL= sURL; &~-~5B|3"
sFilePath = sPath; 61_f3S(u
sFileName = sName; Vq ^]s$'
this.nSplitter = nSpiltter; !gP0ndRJ=
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} 9z ?7{2C
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public String getSSiteURL() |n6Eg9
{ *'R#4@wmP
return sSiteURL; A0xC,V~z
} ~
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public void setSSiteURL(String value) eThy+
{ I@ \#up}
sSiteURL = value; UQT'6* !
} .q;ED`G
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public String getSFilePath() :&VcB$
{ z4M1D9iPY
return sFilePath; ftZj}|R!
} w'ybbv{c
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public void setSFilePath(String value) 9E1W|KE
{ IA*KaX2S<
sFilePath = value; x?r1s#88>
} K7`YJp`i
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public String getSFileName() 7#-y-B]l
{ tRfm+hqRZ
return sFileName; .FP$ IWt/1
} 8SmjZpQ?
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public void setSFileName(String value) v[S-Pi1
{ 'Ud|Ex@A9
sFileName = value; jO'|mGUM
} ]tt} #
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public int getNSplitter() rPiNv
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{ \7Cg,Xn
return nSplitter; `l]j#qshTm
} ]=&L