/* WZ?!!
**SiteFileFetch.java `?uPn~,e8
*/ \r;F2C0*i
package NetFox; "}zda*z8
import java.io.*; &fSTR-8ev#
import java.net.*; hYb9`0G"2
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public class SiteFileFetch extends Thread { 10MU-h.)
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SiteInfoBean siteInfoBean = null; //文件信息Bean H/J<Pd$p
long[] nStartPos; //开始位置 U3F3((EYJ
long[] nEndPos; //结束位置 vg(K$o{BT
FileSplitterFetch[] fileSplitterFetch; //子线程对象
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long nFileLength; //文件长度 *#2Rvt*Ox
boolean bFirst = true; //是否第一次取文件 z*LiweR-
boolean bStop = false; //停止标志 hZN<Yd8:
File tmpFile; //文件下载的临时信息 ~G`J
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DataOutputStream output; //输出到文件的输出流 C3S`}o.
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 1TRN~#ix
public SiteFileFetch(SiteInfoBean bean) throws IOException [/ohk&
{ lLCdmxbT
siteInfoBean = bean; #T \
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 0M8.U
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); uRQ_'l
if(tmpFile.exists ()) o:UXPAj
{ `^##b6jH
bFirst = false; R2LK.bTVn
read_nPos(); X/+OF'po
} 0 {R/<N
else I/B1qw;MN
{ xK;e\^v
nStartPos = new long[bean.getNSplitter()]; XP;x@I#l
nEndPos = new long[bean.getNSplitter()]; ~>%DKJe
} Zq*eX\#C
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} .7Kk2Y
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public void run() -_~)f{KN@
{ .mPg0
//获得文件长度 rkYjq4Z@
//分割文件 onl>54M^
//实例FileSplitterFetch f0oek{
//启动FileSplitterFetch线程 Kx6y"
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//等待子线程返回 inF6M8
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try{ n}J^6:1
if(bFirst) SxMj,u%X/
{ [xdj6W
nFileLength = getFileSize(); - DL"-%X.
if(nFileLength == -1) HXks_ix )
{ Q2\
System.err.println("File Length is not known!"); [rdsv
} ',mW`ZN
else if(nFileLength == -2) _N'75
{ )|]Z>>%t
System.err.println("File is not access!"); @2' %o<lF
}
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else 7ZFJexN]
{ Z$;"8XUM
for(int i=0;i<nStartPos.length;i++) F~_;o+e;X
{ &KqVN]1+^
nStartPos = (long)(i*(nFileLength/nStartPos.length)); zk=\lp2
} e|'N(D}h*
for(int i=0;i<nEndPos.length-1;i++) !T'X
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{ nq;#_Rkr
nEndPos = nStartPos[i+1]; X~RH^VYv
} wUp)JI
nEndPos[nEndPos.length-1] = nFileLength; P*G+eqX
} r4eUZ .8R
} RP`
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//启动子线程 SRz&Nb
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ?~F. /
for(int i=0;i<nStartPos.length;i++) c8DZJSO
{ `ROEV~
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Dip*}8$o(w
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), WC-_+9)2&
nStartPos,nEndPos,i); n33kb/q*
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); U9ZbVjqv@
fileSplitterFetch.start(); H_B~P%E@]
} =!<G!^
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), mG(N:n%*K
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); kRot7-7I|
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", T1NH eH>
nEndPos = " + nFileLength); p`>d7S>"
// fileSplitterFetch[nPos.length-1].start(); QN
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//等待子线程结束 '29WscU
//int count = 0; ;$!I&<)
//是否结束while循环 aWaw&u
boolean breakWhile = false; a%K}j\M
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while(!bStop) D ,M@8h,
{ M|%c(K#E,3
write_nPos(); |.w;r
Utility.sleep(500); arj$dAW
breakWhile = true; uO'/|[`8
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for(int i=0;i<nStartPos.length;i++) z="L4
{ Y@} FL;3
if(!fileSplitterFetch.bDownOver) D4Sh9:\
{ uva\0q
breakWhile = false; =`p&h}h-L
break; l$XA5#k
} hC>wFC
} {;k_!v{
if(breakWhile) (cs~@
break; ]Oso#GYD
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//count++; _01Px a2.
//if(count>4) A3s57.Z]|
// siteStop(); %#k,6;m
} |Fv?6qw+
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System.err.println("文件下载结束!"); GZ3/S|SMP
} CW0UMPE5
catch(Exception e){e.printStackTrace ();} Efr&12YSS
} >L[lV_M_>
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//获得文件长度
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public long getFileSize() ~ hm`uP
{ JEHK:1^
int nFileLength = -1; qG9qN.|dC
try{ KO,_6>8]U
URL url = new URL(siteInfoBean.getSSiteURL()); treXOC9^B8
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); cyMs(21
httpConnection.setRequestProperty("User-Agent","NetFox"); 2
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int responseCode=httpConnection.getResponseCode(); yWHne~!
if(responseCode>=400) 2Xgx*'t\
{ ]kS7n@8
processErrorCode(responseCode); q^Inb)FeN
return -2; //-2 represent access is error ]{Ek[Av
} xIgql}.
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String sHeader; kF-TG3
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for(int i=1;;i++) 0j$OE
{ hW%p#g;
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); \!w h[qEQ\
//Utility.log(in.readLine()); vlQ0gsXK
sHeader=httpConnection.getHeaderFieldKey(i); ^<;w+%[MT
if(sHeader!=null) RVP 18ub.S
{ z!CD6W1n
if(sHeader.equals("Content-Length")) -N z}DW>
{ AbZ:(+@cP
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); XV5`QmB9
break; fuyl/bx}
} b-nY xd
} F< |c4
else a#QByP
break; rfTe
} XnY"oDg^>
} ]) n0MF)p
catch(IOException e){e.printStackTrace ();} ND*]gM
catch(Exception e){e.printStackTrace ();} BD'NuI
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Utility.log(nFileLength); +H}e)1^I
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return nFileLength; ;eh/_hPM
} ]xrD<
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//保存下载信息(文件指针位置) #eLN1q&Z
private void write_nPos() OPiaG!3<
{ M.[wKGX(
try{ Ff)@L-Y\K
output = new DataOutputStream(new FileOutputStream(tmpFile)); P;c0L;/
output.writeInt(nStartPos.length); 8[HZ@@
for(int i=0;i<nStartPos.length;i++) NL-_#N$
{ R&!]Rl9hf
// output.writeLong(nPos); ,Hh*3rR^
output.writeLong(fileSplitterFetch.nStartPos); 4W-"|Z_x
output.writeLong(fileSplitterFetch.nEndPos); ^4UcTjh
} e
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output.close(); -yA3 RP
} ;^ov~PPl
catch(IOException e){e.printStackTrace ();} >13/h]3
catch(Exception e){e.printStackTrace ();} l0#4Fma
} $WClpvVj
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//读取保存的下载信息(文件指针位置) M8_ R
private void read_nPos() G"C;A`6
{ .q inR6=
try{ 9A<0zt
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); mt^`1ekoY
int nCount = input.readInt(); InN{^uN
nStartPos = new long[nCount]; cD8Ea(
nEndPos = new long[nCount]; ,-:a?#f>
for(int i=0;i<nStartPos.length;i++) P57GqT
{ m9Il\PoTq
nStartPos = input.readLong(); g? I!OG
nEndPos = input.readLong(); ?OO%5PSe n
} sW'6}^Q
input.close(); -%=RFgU4
} f?5A"-NS
catch(IOException e){e.printStackTrace ();} TZBVU&,{Z
catch(Exception e){e.printStackTrace ();} GoL|iNW`
} YM8rJ-
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private void processErrorCode(int nErrorCode) R9r)C{63S&
{ LUG9 #.
System.err.println("Error Code : " + nErrorCode); feN!_-
} j%u8=
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//停止文件下载 !U[:5@s06
public void siteStop() Pv[ykrm/
{ FH[#yq.Pr
bStop = true; + "zYn!0
for(int i=0;i<nStartPos.length;i++) )r pD2H
fileSplitterFetch.splitterStop(); {s9<ej~<R
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} qzHU)Ns(_
} ~.H~XKw
//负责部分文件的抓取 *F..ZS'$[
**FileSplitterFetch.java Onyh1
*/ n5\}KZh
package NetFox; <d S5|||
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import java.io.*; _1\poAy
import java.net.*; 01o [!n T
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public class FileSplitterFetch extends Thread { SlT7L||Ww
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String sURL; //File URL $i -zMa
long nStartPos; //File Snippet Start Position _}^u-fJ/~
long nEndPos; //File Snippet End Position $-e=tWkgv
int nThreadID; //Thread's ID SNN#$8\
boolean bDownOver = false; //Downing is over :S#i9# aB
boolean bStop = false; //Stop identical z:?:
FileAccessI fileAccessI = null; //File Access interface r\B"?oqC
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 1Lc8fP$
{ 0a@c/XGBp
this.sURL = sURL; CxkMhd8qz
this.nStartPos = nStart; nqrDT1b**
this.nEndPos = nEnd; >I|<^$/
nThreadID = id; 1B(G]o_>!
fileAccessI = new FileAccessI(sName,nStartPos);//定位 PH[4y:^DN
} i:{:xKiC a
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public void run() 9V.+U7\w
{ /K[]B]1NE
while(nStartPos < nEndPos && !bStop) ^SgN(-QH
{ $.;iu2iyo
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try{ 'Z y{mq\
URL url = new URL(sURL); +<z7ds{Z
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); fs7~NY
httpConnection.setRequestProperty("User-Agent","NetFox"); pRb<wt7v
String sProperty = "bytes="+nStartPos+"-"; }&C dsCM>2
httpConnection.setRequestProperty("RANGE",sProperty); u6f4yQ
Utility.log(sProperty); A_aO}oBX
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InputStream input = httpConnection.getInputStream(); y>4p~
//logResponseHead(httpConnection); ~6] )*y
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byte[] b = new byte[1024]; NWeV>;lh9
int nRead; [@x
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) t&38@p
{ v [dAywW
nStartPos += fileAccessI.write(b,0,nRead); ?l(nM+[kSL
//if(nThreadID == 1) { qjUI
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 1]HHe*'Z
} X,&`WPA:S
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Utility.log("Thread " + nThreadID + " is over!"); bKTqX[ =
bDownOver = true; ]Kof sU_{
//nPos = fileAccessI.write (b,0,nRead); p1C_`f N,
} Q:kwQg:~
catch(Exception e){e.printStackTrace ();} g^qz&;R]
} wE)]
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} )7tV*=?Ic8
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//打印回应的头信息 ?U=mcdqd
public void logResponseHead(HttpURLConnection con) PKl]GegP
{ -?[O"D"c
for(int i=1;;i++) <##|311o
{ fi5YMYd1
String header=con.getHeaderFieldKey(i); C+DG+_%V*S
if(header!=null) _xa}B,H
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 2-QuT"Gkd
Utility.log(header+" : "+con.getHeaderField(header)); Fka1]|j9
else XC
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break; d~w}NK[(
} hkkF1
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} NJ.rv
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public void splitterStop() <yis
{ 4
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bStop = true; ys:1Z\$P
} 4F}g(
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} cb\jrbj6
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/* +oE7~64LL
**FileAccess.java -bv>iIC
*//文件访问(定位,写) Z83q-
package NetFox; [c,|Lw4
import java.io.*; K-N]h
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public class FileAccessI implements Serializable{ w:~nw;.T
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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 zv8aV2?D
RandomAccessFile oSavedFile; r)) $XM
long nPos; 6-)7:9y
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public FileAccessI() throws IOException >1#DPU(g
{ lCM6T;2ID
this("",0); 9O(i+fM
} M!;`(_2
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public FileAccessI(String sName,long nPos) throws IOException ]2hF!{wc
{ RTdD]pE8Q
oSavedFile = new RandomAccessFile(sName,"rw"); 2hjre3"?
this.nPos = nPos; (OM?aW
oSavedFile.seek(nPos); 'w>uFg1.
} DLwC5Iir
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public synchronized int write(byte[] b,int nStart,int nLen) Co{MIuL
{ EuR!yD
int n = -1; 1puEP*P
try{ ;oN{I@}k
oSavedFile.write(b,nStart,nLen); U89]?^|bb
n = nLen; :F!dTD$
} EM>c%BH<N
catch(IOException e) eONeWY9
{ .y/NudD
e.printStackTrace (); rCnV5Yb0O
} d/ 'A\"o+
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return n; Im0+`9Jw
} a'*5PaXU@/
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} 2n-Tpay0
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/* G#9o?
**SiteInfoBean.java }J'5EAp
*/ 89:?.'
package NetFox; mVc'%cPaw
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public class SiteInfoBean { ims=-1,
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private String sSiteURL; //Site's URL YW4bm
private String sFilePath; //Saved File's Path _{2Fx[m%
private String sFileName; //Saved File's Name 0`g}(}'L
private int nSplitter; //Count of Splited Downloading File T@d_t
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public SiteInfoBean() e"v[)b++Y
{//nSplitter的缺省值为5 5'{qEZs^QU
//default value of nSplitter is 5 :*F3
this("","","",5); PpJE|[]
} $BR=IYby
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 7YQK@lS
{ fY,@2VxyfA
sSiteURL= sURL; OI]K_ m3
sFilePath = sPath; LS2ek*FJO
sFileName = sName; @^XkU(m
this.nSplitter = nSpiltter; R&x7