/* vciO={M
**SiteFileFetch.java ,:[\h\5m
*/ .)(5F45Wg
package NetFox; B1^9mV'O
import java.io.*; ,zF^^,lO7
import java.net.*; B`<a~V
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public class SiteFileFetch extends Thread { k2-+3zx
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SiteInfoBean siteInfoBean = null; //文件信息Bean {!0f.nv
long[] nStartPos; //开始位置 pNFVa<D
long[] nEndPos; //结束位置 \wR;N/tg
FileSplitterFetch[] fileSplitterFetch; //子线程对象 _a]0<Vm C0
long nFileLength; //文件长度 "!S7D>2y#
boolean bFirst = true; //是否第一次取文件 Wf!u?nH.5
boolean bStop = false; //停止标志 J;DTh ]z?:
File tmpFile; //文件下载的临时信息 ,gO(zI-1
DataOutputStream output; //输出到文件的输出流 ;$.^
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) BbIg]E/G
public SiteFileFetch(SiteInfoBean bean) throws IOException 6N\f>c
{ R4_BP5+
siteInfoBean = bean; S^Mx=KJG
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); >,6%Y3
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ~'#yH#o
if(tmpFile.exists ()) a&z$4!wQB
{ rtxG-a56Q
bFirst = false; oUd R,;h9
read_nPos(); 2rGg
} Ir6(EIwx0
else j&-<e7O=
{ B<{Yj}..
nStartPos = new long[bean.getNSplitter()]; *";O_ :C!
nEndPos = new long[bean.getNSplitter()]; =G\N1E
} ThiM6Hb
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} \o}=ob
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public void run() +.J/7gD
{ q[TGEgG
//获得文件长度 U|~IJU3-
//分割文件 AA XQ+!
//实例FileSplitterFetch kInU,/R*
//启动FileSplitterFetch线程 m)ENj6A>yP
//等待子线程返回 bH}?DMq]O
try{ Yln[ZmK9g
if(bFirst) P`L, eYc
{ |hD)=sCj
nFileLength = getFileSize(); _ SJFuv/
if(nFileLength == -1) }X9G(`N(}
{ EkpM'j=
System.err.println("File Length is not known!"); 8
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} YBupC!R
else if(nFileLength == -2) MlV3qM@
{ `^df la
System.err.println("File is not access!"); )mu[ye"p
} !BDJU
else Ksf f]##H
{ 4Z0Y8y8)
for(int i=0;i<nStartPos.length;i++) xM:9XhH1
{ 06NW2A%wv
nStartPos = (long)(i*(nFileLength/nStartPos.length)); wBz5_ OFVw
} }k0B
for(int i=0;i<nEndPos.length-1;i++) s x2\
{ b[^|.>b
nEndPos = nStartPos[i+1]; v[]&yD
} JIXZI\Fk
nEndPos[nEndPos.length-1] = nFileLength; Ey&gZ$|&
} ldWrv7.P
} _F`RwBOjs
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//启动子线程 /DX6Hkkj %
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 7g.3)1
for(int i=0;i<nStartPos.length;i++) ]6].l$%z#
{ !h70 <Q^
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Ap!Y 3C
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ZjveXrx
nStartPos,nEndPos,i); r2=4Wx4(
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {YIf rM
fileSplitterFetch.start(); lbm ,#
} &+" )~2
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), evlz R/
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ^oDSU7j5,
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", m^KK
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nEndPos = " + nFileLength); \@$V^;OP/
// fileSplitterFetch[nPos.length-1].start(); 4||dc}I"E
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//等待子线程结束 cIg+^Tl
//int count = 0; \*\ )zj*r
//是否结束while循环 0[R7HX-@
boolean breakWhile = false; Y(R .e7]
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while(!bStop) aK]H(F2#
{ +&.wc;mi
write_nPos(); c4iGtW
Utility.sleep(500); :tT6V(-W
breakWhile = true; a[7Lqu
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for(int i=0;i<nStartPos.length;i++) a1gaB:w5n
{ Yl"l|2
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if(!fileSplitterFetch.bDownOver) M"E7=J
{ +t*Ks_V,*
breakWhile = false; aUbmEHFTV
break; i7foZ\btFc
} A x'o|RE)x
} -P-&]F5
if(breakWhile) ,Kwtp)EX
break; yc.9CTxx
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//count++; 4 {rj 4P?
//if(count>4) zA*I=3E(
// siteStop(); 8Lr&-w8J
} @Q%<~b[y
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System.err.println("文件下载结束!"); Q$8K-5U%
} Hg2Rcl
catch(Exception e){e.printStackTrace ();} aW(Hn[}^
} 'ARbJ1a
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//获得文件长度 % jSB9
public long getFileSize() pvY BhTz0
{ "RLv{D<)J,
int nFileLength = -1; WFG`-8_e[I
try{ ;Miag'7
URL url = new URL(siteInfoBean.getSSiteURL()); vY2^*3\<D
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @w73U;9\
httpConnection.setRequestProperty("User-Agent","NetFox"); 9_xJT^10
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int responseCode=httpConnection.getResponseCode(); Zk>#T:{h
if(responseCode>=400) .A
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{ k%%0"+y#a
processErrorCode(responseCode); # b94S?dq
return -2; //-2 represent access is error @ ('/NjTZ
} >$G'=N:=X&
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String sHeader; v`Yj)
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for(int i=1;;i++) XU|>SOR@z
{ Y>Fh<"A|$
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); A8T8+M:
//Utility.log(in.readLine()); &*#Obv
sHeader=httpConnection.getHeaderFieldKey(i); =:_DXGW2H
if(sHeader!=null) L)X[$:
{ lw=!v%L
if(sHeader.equals("Content-Length")) R3hyz~\x&
{ v4vIcHDs
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); /&+*X)#v
break; x &*2R#Ai
} 85qD~o?O
} Y+ !z]S/x
else 1"f)\FPGe
break; @G^m+-
} qh#?a'
} OE=.@Ry"
catch(IOException e){e.printStackTrace ();} OBL2W\{
catch(Exception e){e.printStackTrace ();} jJyS^*.X
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Utility.log(nFileLength); +;bP.[Z
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return nFileLength; `y$@zT?j
} 47!k!cHa
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//保存下载信息(文件指针位置) ;k
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private void write_nPos() Igh=Z %
{ @t2S"s$m
try{ n;e.N:p
output = new DataOutputStream(new FileOutputStream(tmpFile)); th%T(D5n
output.writeInt(nStartPos.length); 5Kl;(0B9
for(int i=0;i<nStartPos.length;i++) "f:_(np,
{ 6e%ZNw{#=
// output.writeLong(nPos); B7(bNr
output.writeLong(fileSplitterFetch.nStartPos); =F09@C,
output.writeLong(fileSplitterFetch.nEndPos); _b9>ZF~
} b<j*;n.
output.close(); v(;n|=O
} ,c|Ai(U
catch(IOException e){e.printStackTrace ();} 5DL(#9F8b9
catch(Exception e){e.printStackTrace ();} z@[-+Q:
} ht2J, 1t
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//读取保存的下载信息(文件指针位置) Bdm05}c@u
private void read_nPos() (}
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{ b\p2yJ\
try{ WHcw5_3#
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); K"8!
int nCount = input.readInt(); 10CRgrZ
nStartPos = new long[nCount]; 2 }rYH;Mx
nEndPos = new long[nCount]; \m#{{SGm
for(int i=0;i<nStartPos.length;i++) jD?*sd
{ R%"'k<`#
nStartPos = input.readLong(); AbIYdFX B
nEndPos = input.readLong(); 465?,EpS
} X'p%K/-m
input.close(); 814cCrr,o
} 0~BZh%s< (
catch(IOException e){e.printStackTrace ();} |eK^Yhym
catch(Exception e){e.printStackTrace ();} O+t'E9Fa
} Iz8gZ:rd0
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private void processErrorCode(int nErrorCode) L,sFwOWY
{ ~0rvrDDg
System.err.println("Error Code : " + nErrorCode); NXOcsdcZu
} MP~+@0cv
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//停止文件下载 L=&}s[5
public void siteStop() bycnh
{ P>'29$1'
bStop = true; D&1(qi=x&
for(int i=0;i<nStartPos.length;i++) =l>=]O~h
fileSplitterFetch.splitterStop(); d?aZk-|c
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} *mn"GK6
} P?Kg7m W
//负责部分文件的抓取 :(;ho.zz
**FileSplitterFetch.java j+Q+.39s-~
*/ mp8Zb&Ggb
package NetFox; <(l`zLf4p
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import java.io.*; e8{!Kjiz
import java.net.*; &t}6sD9o
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public class FileSplitterFetch extends Thread { 1i;Cw/mr
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String sURL; //File URL u24XuSe$
long nStartPos; //File Snippet Start Position 3e1%G#fu
long nEndPos; //File Snippet End Position `:Zgq+j&
int nThreadID; //Thread's ID s1p<F,
boolean bDownOver = false; //Downing is over XI"IEwB
boolean bStop = false; //Stop identical "8E=*2fcw
FileAccessI fileAccessI = null; //File Access interface =.qPjp_Qd
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Tn?D~?a*O
{ Z9i~>k
this.sURL = sURL; e^v\K[
this.nStartPos = nStart; #JR$RH
this.nEndPos = nEnd; `bWc<4T
nThreadID = id; @{ L|&Mk!
fileAccessI = new FileAccessI(sName,nStartPos);//定位 bjq.nn<=
} o)8VJ\ &
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public void run() "
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{ B5[As8Sa
while(nStartPos < nEndPos && !bStop) M-(,*6Q
{ 1jd.tup
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try{ \/9 O5`u*V
URL url = new URL(sURL); .Dy2O*`
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); o1H6E1$=
httpConnection.setRequestProperty("User-Agent","NetFox"); B/B`=%~5_^
String sProperty = "bytes="+nStartPos+"-"; H%ScrJ#V
httpConnection.setRequestProperty("RANGE",sProperty); Nx!7sE*b$1
Utility.log(sProperty); ,My'_"S?
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InputStream input = httpConnection.getInputStream(); yO@@-)$[y
//logResponseHead(httpConnection); &D&U!3~(
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byte[] b = new byte[1024]; ~xcU6@/
int nRead; h<7@3Ur
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) zrwzI+4
{
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nStartPos += fileAccessI.write(b,0,nRead); lU`t~|>r+
//if(nThreadID == 1) ,M
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// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
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} W+Ou%uv}S
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Utility.log("Thread " + nThreadID + " is over!"); tO3#kV\,
bDownOver = true; TXqtE("BDl
//nPos = fileAccessI.write (b,0,nRead); ^~s!*T)\
} NleMZ
catch(Exception e){e.printStackTrace ();} $&s V.fGu
} w`atk=K
} 28j/K=0(
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//打印回应的头信息 !:v7SRUXb
public void logResponseHead(HttpURLConnection con) l!:L<B
{ biRkqc;
for(int i=1;;i++) 9[[$5t`8
{ h r6?9RJY
String header=con.getHeaderFieldKey(i); "YVr/u
if(header!=null) [J55%N;#1
//responseHeaders.put(header,httpConnection.getHeaderField(header)); >uFFTik
Utility.log(header+" : "+con.getHeaderField(header)); K1p. {
else |<%v`*
break; T&j:gg
} YR[I,j
} (IIZ vCek
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public void splitterStop() Cv;#8Wj}
{ tD,I7%|@
bStop = true; Y/
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} szD9z{9"y
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} h+Y>\Cxg
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/* V`G^Jyj
**FileAccess.java k7]4TIUD*
*//文件访问(定位,写) g!Ui|]BI9
package NetFox; |W}D_2
import java.io.*; :k2J
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public class FileAccessI implements Serializable{ Y Azj>c&
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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 AYDAt5K_
RandomAccessFile oSavedFile; }|)T<|Y;
long nPos; ;D@ F
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public FileAccessI() throws IOException V(Cxd.u
{ |hX\ep
this("",0); R_"6E8N
} #}Bv/`t
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public FileAccessI(String sName,long nPos) throws IOException ! 6R|
{ k#Qjm9V
oSavedFile = new RandomAccessFile(sName,"rw"); h?vny->uJ
this.nPos = nPos; <- R%
oSavedFile.seek(nPos); \\{78WDA
} w}8=sw
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public synchronized int write(byte[] b,int nStart,int nLen)
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{ n^nQrRIp
int n = -1; (%G>TV
try{ _qH]OSo
oSavedFile.write(b,nStart,nLen); JURg=r]LI
n = nLen;
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} YoZd,} i
catch(IOException e) M0hR]4T
{ g!i45]6[Nw
e.printStackTrace (); Nh !U
} %VE FruM
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return n; =@nW;PUZ
} X5= Ki
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} 2o7o~r
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/* YB4|J44Y
**SiteInfoBean.java zLPCWP.u
*/ @f-rS{
package NetFox; aw7pr464
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public class SiteInfoBean { R5 EC/@
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private String sSiteURL; //Site's URL u%Z4 8wr
private String sFilePath; //Saved File's Path FH;)5GGnv
private String sFileName; //Saved File's Name Eb8z`@p
private int nSplitter; //Count of Splited Downloading File y;hco
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public SiteInfoBean() 2XeN E[
{//nSplitter的缺省值为5 0IsnG?"
//default value of nSplitter is 5 /|<0,oz oJ
this("","","",5); {Hw$`wL
} d"+ _`d=`
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) "azrcC
{ =I+5sCF{g
sSiteURL= sURL; >
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sFilePath = sPath; <"S/M]9
sFileName = sName; +jp^
this.nSplitter = nSpiltter; o7g6*hJz
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} >JN[5aus
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public String getSSiteURL() ~ o5h}OU"
{ `]<~lf
return sSiteURL; E8We2T[^M
} |U="B4
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public void setSSiteURL(String value) uL@'Hv A
{ $7\hszjZ
sSiteURL = value; zx5t
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} m RtE~~p
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public String getSFilePath() @wXo{p@W
{ ?^:
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return sFilePath; ` ln=D$
} pB,@<\l %
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public void setSFilePath(String value) \Eyy^pb
{ !q*]_1
sFilePath = value; =/HTe&
} 8f#&CC!L
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public String getSFileName() 5LxzET"P
{ cU r'mb
return sFileName; ]F,v#6qi
} a7l-kG=R;
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public void setSFileName(String value) iI%"]- 0@1
{ ,vUMy&AV
sFileName = value; n!\&X9%[8
} i52:<<