/* M('cG
**SiteFileFetch.java U;:,$]+
*/ w{"GA~=
package NetFox; ]-aeoa#
import java.io.*; oa?eK
import java.net.*; $V)LGu2(m
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public class SiteFileFetch extends Thread { *<! W k\
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SiteInfoBean siteInfoBean = null; //文件信息Bean D4r5wc%
long[] nStartPos; //开始位置 ZCMB]bL-e
long[] nEndPos; //结束位置 w%k)J{\
FileSplitterFetch[] fileSplitterFetch; //子线程对象 %d9UW Q
long nFileLength; //文件长度 $0Y&r]'
boolean bFirst = true; //是否第一次取文件 0PnW|N0
boolean bStop = false; //停止标志 OI.2C F
File tmpFile; //文件下载的临时信息 3HA$k[%7P
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) bkl'0
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public SiteFileFetch(SiteInfoBean bean) throws IOException )8yee~+TN
{ OR^Wd
siteInfoBean = bean; VmkYl$WZo
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 6mBX{-Z[
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); WU1o4&OF
if(tmpFile.exists ()) K0\a+6kh
{ Wx/!Myu
bFirst = false; z[S,hD\w
read_nPos(); \wNn c"
} Co19^g*
else iEki<e/
{ LZG^\c$
nStartPos = new long[bean.getNSplitter()]; @X/S
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nEndPos = new long[bean.getNSplitter()]; Em@h5V
} d#a
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} KF'H|)!K
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public void run() R\:C|/6f
{ [ylGNuy
//获得文件长度 2>O2#53ls0
//分割文件 ;.W0Aa
//实例FileSplitterFetch [`fq4Ky
//启动FileSplitterFetch线程 "\BP+AF
//等待子线程返回 Whd4-pR8
try{ Xx|&%b{{r
if(bFirst) ^l^_ K)tw*
{ ^^?DYC
nFileLength = getFileSize(); n/@/yJ<EFi
if(nFileLength == -1) i?AZ|Ha[
{ Lx?bO`=qg7
System.err.println("File Length is not known!"); dY\"'LtF
} e|Sg?ocR
else if(nFileLength == -2) =b% J@}m`&
{ B0z.s+.
System.err.println("File is not access!"); yK?~XV:
} TKLy38
else Op)0D:BmR
{ u."fJ2}l0X
for(int i=0;i<nStartPos.length;i++) R~w(]
{ [l#WS
nStartPos = (long)(i*(nFileLength/nStartPos.length)); h0.Fstf]
} ;6b#I$-J-
for(int i=0;i<nEndPos.length-1;i++) @gi
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{ R|+R4'
nEndPos = nStartPos[i+1]; &ApJ'uC
} #]eXI
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nEndPos[nEndPos.length-1] = nFileLength; EJWMr`zdn
} rY!uc!
} DAu|`pyC%
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//启动子线程 DQlaSk4hF_
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; b7AuKY{L
for(int i=0;i<nStartPos.length;i++) HnP;1Gi
{ oLr"8R\d>t
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), dWqFP
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 4(aesZ8h
nStartPos,nEndPos,i); cZ!s/^o?f
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); iQ9#gPk_9
fileSplitterFetch.start(); U[A*A^$c}
} <Z m ,q}
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), gv[7h'}<
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); l(]\[}.5
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", "j a0,%3
nEndPos = " + nFileLength); ZHC sv]l
// fileSplitterFetch[nPos.length-1].start(); [QZ~~(R
2/7=@>|
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//等待子线程结束 [BQw$8+n_
//int count = 0; "{x~j\<
//是否结束while循环 K%pmE?%,8
boolean breakWhile = false; #dpt=
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while(!bStop) >|Jw,,uf
{ 4|$D.`Wu
write_nPos(); D} .t
Utility.sleep(500); 3-mw-;.
breakWhile = true; ,K9UT#h
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for(int i=0;i<nStartPos.length;i++) @^` <iTK&p
{ /M3D[aR<d
if(!fileSplitterFetch.bDownOver) z'qVEHc)
{ 7%E1F)%
breakWhile = false; *(vq-IE\$
break; -YuvEm#f
} h+74W0
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} zDl, bLiJ
if(breakWhile) O h"^
break; Mb>6.l
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//count++; `5 6QX'?
//if(count>4) 6#KI?
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// siteStop(); jO,<7FPs5
} P+b^;+\1s
{;4PP463
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System.err.println("文件下载结束!"); b;t]k9:"L
} -Y[-t;
catch(Exception e){e.printStackTrace ();} t~M<j|]k
} y[|g!9Rp
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//获得文件长度 +E [b Lz^
public long getFileSize() *(`.h\+
{ %f-<ol
int nFileLength = -1; MzG ryM-
try{ &!a2%%1#N
URL url = new URL(siteInfoBean.getSSiteURL()); lBn*G&(P
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); iTt=aQjd
httpConnection.setRequestProperty("User-Agent","NetFox"); Az-!LAu9 R
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int responseCode=httpConnection.getResponseCode(); [;=ky<K0E
if(responseCode>=400) 'YR5i^:t
{ Dy@\!F
processErrorCode(responseCode); 9(l'xu X
return -2; //-2 represent access is error ,>UmKrYo
} *i{.@RX?
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String sHeader; `az`?`i7
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for(int i=1;;i++) spx;QLo
{ 2SJh6U
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); %^l&fM*
//Utility.log(in.readLine()); u}1vn} F{
sHeader=httpConnection.getHeaderFieldKey(i); +r$.v|6
if(sHeader!=null) /
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{ 0tqR wKL
if(sHeader.equals("Content-Length")) ee_\_"
{ 9-Qtj49
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); x!~OK::o8
break; %~5Q^3$O
} GF!{SO4
} GnOo+hB
else W`'|&7~
break; V
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}
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} #Q@6:bBzv
catch(IOException e){e.printStackTrace ();} XC1lo4|
catch(Exception e){e.printStackTrace ();} ;0!Wd
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Utility.log(nFileLength); 8~)[d!'
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return nFileLength; &{/>Sv!6#
} s~$4bN>LD
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//保存下载信息(文件指针位置) Zax]i,Bx
private void write_nPos() $JB:rozE
{ C9H11g7{
try{ <M OL{jan
output = new DataOutputStream(new FileOutputStream(tmpFile)); ,;P`Mf'YC
output.writeInt(nStartPos.length); e-cb?.WU?
for(int i=0;i<nStartPos.length;i++) gwaC?tf[
{ &8AS=v
// output.writeLong(nPos); >v_5xd9
output.writeLong(fileSplitterFetch.nStartPos); thPH_DW>eb
output.writeLong(fileSplitterFetch.nEndPos); !;*2*WuO;
} D
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output.close(); aaugu.9
} ]A]E)*
catch(IOException e){e.printStackTrace ();} 70
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catch(Exception e){e.printStackTrace ();} RpK,ixbtA+
} 7 3z
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//读取保存的下载信息(文件指针位置) .&x?`pER
private void read_nPos() -mHhB(Td'
{ [a)~Dui0@\
try{ /Tf*d>Yh;
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ptcLJ]+)
int nCount = input.readInt(); :5K~/=6x
nStartPos = new long[nCount]; f76|
nEndPos = new long[nCount]; CotMV^
for(int i=0;i<nStartPos.length;i++) Z)O>h^0
{ A%*DQ1N
nStartPos = input.readLong(); R,w54},
nEndPos = input.readLong(); }Q=se[((
} lMzCDx!m
input.close(); N"x\YHp
} FJ%R3N\
catch(IOException e){e.printStackTrace ();} #oroY.o
catch(Exception e){e.printStackTrace ();} TnBG MI,g'
} 3zA=q[C
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private void processErrorCode(int nErrorCode) Q xF8=p
{ ~:}XVt0%8
System.err.println("Error Code : " + nErrorCode); qv*uM0G6i
} 4fu\3A&
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//停止文件下载 %M)oHX1p
public void siteStop() Cb%.C;q
{ Bd oC6H
bStop = true; v*'iWHCl,
for(int i=0;i<nStartPos.length;i++) ioY\8i
fileSplitterFetch.splitterStop(); d! QD vO
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} H=o-ScA
} gjegzKU
//负责部分文件的抓取 8
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**FileSplitterFetch.java &iND&>?
*/ p-yOiG8b}
package NetFox; a,57`Ks+n<
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import java.io.*; enbN0
import java.net.*; (LT\
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public class FileSplitterFetch extends Thread { 3n84YX{
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String sURL; //File URL *L4]\wf
long nStartPos; //File Snippet Start Position _czbUl
long nEndPos; //File Snippet End Position vBnKu
int nThreadID; //Thread's ID q:-]d0B+
boolean bDownOver = false; //Downing is over 1^60I#Vr@
boolean bStop = false; //Stop identical V:(w\'wm
FileAccessI fileAccessI = null; //File Access interface l\sS?
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException f.$aFOn
{ ^!o1l-Y^gr
this.sURL = sURL; !7kLFW
this.nStartPos = nStart; KXx@
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this.nEndPos = nEnd; PQ&Q71
nThreadID = id; /_:T\`5uO
fileAccessI = new FileAccessI(sName,nStartPos);//定位 DUuC3^R
} {glqWFT
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public void run() 5&-j{J0iV
{ T[4[/n>i
while(nStartPos < nEndPos && !bStop) Q/3tg
{ *_{l
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try{ "%}Gy>;
URL url = new URL(sURL); N[a ljC-R
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Gdf1+mi
httpConnection.setRequestProperty("User-Agent","NetFox"); [DotS\p!z
String sProperty = "bytes="+nStartPos+"-"; u>t|X}JH
httpConnection.setRequestProperty("RANGE",sProperty); @`IXu$Wm(
Utility.log(sProperty); ;o_V!<$
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InputStream input = httpConnection.getInputStream(); n{.*El>{
//logResponseHead(httpConnection); ;e~{TkD
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byte[] b = new byte[1024]; 1Es*=zg
int nRead; Y0Hq+7x
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) +#-kIaU
{ ^&`sWO@=
nStartPos += fileAccessI.write(b,0,nRead); *;OJ~zT
//if(nThreadID == 1) [V> :`?
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); C-a*EG
} aDN6MZM
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*l> [`U+
Utility.log("Thread " + nThreadID + " is over!"); IDGQIg
bDownOver = true; |5}rX!wS4
//nPos = fileAccessI.write (b,0,nRead); vgh^fa!/
} j.=UI-&m
catch(Exception e){e.printStackTrace ();} KrdZEi vb
} ih+*T1#:(
} IFd )OZ5
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//打印回应的头信息 .6O52E
public void logResponseHead(HttpURLConnection con) H )BOSZD
{ ),nCq^Bp
for(int i=1;;i++) iA55yT+
{ )(:+q(m
String header=con.getHeaderFieldKey(i); 4|zdXS
if(header!=null) L;1$xI8tx
//responseHeaders.put(header,httpConnection.getHeaderField(header)); u%6Irdx
Utility.log(header+" : "+con.getHeaderField(header)); Z/89&Uy`h
else lj
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break; >\|kJ?h
} Cec9#C
} 5+e> +$2
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public void splitterStop() z+3<$Z
{ 5cyddlaat
bStop = true; kq) +@p
} 1s{ISWm
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} d\~p5_5.
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/* x4CtSGG85f
**FileAccess.java BA~a?"HS
*//文件访问(定位,写) 0K=Qf69Y
package NetFox; CCbkxHMf|!
import java.io.*; .dD9&n;#^
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public class FileAccessI implements Serializable{ P'a0CE%
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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 !1ML%}vvB,
RandomAccessFile oSavedFile; cZNi~
long nPos; pwJ'3NbS
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public FileAccessI() throws IOException GY oZ$p" C
{ 5h_<R!jA
this("",0); !UBy%DN~k
} jP1$qhp
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public FileAccessI(String sName,long nPos) throws IOException VK @$JwdL
{ gKmX^A5<
oSavedFile = new RandomAccessFile(sName,"rw"); T?W[Z_D
this.nPos = nPos; nqZA|-}
oSavedFile.seek(nPos); UppBnw
} xj0cgK|!
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m! rwG(
public synchronized int write(byte[] b,int nStart,int nLen) F0@Qgk]\
{ @@'nit
int n = -1; uWUR3n
try{ 3LKB;
oSavedFile.write(b,nStart,nLen); M,crz
n = nLen; ao)Ck3]
}
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catch(IOException e) K1:a]aU?Iu
{ Wm<z?.lS
e.printStackTrace (); ;KZrl`
} HbNYP/MN3
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return n; o:_^gJ+|
} }0$mn)*k
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.
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}
}c}
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/* W@l+ciZ_
**SiteInfoBean.java 3@&bxYXm
*/ o>2e!7
package NetFox; c\M#5+ 1j
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j
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public class SiteInfoBean { IQT cYl
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private String sSiteURL; //Site's URL 2-~a
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private String sFilePath; //Saved File's Path [_h%F,_ A
private String sFileName; //Saved File's Name gF3TwAr
private int nSplitter; //Count of Splited Downloading File "ml?7Xl,n
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p"KU7-BfvC
public SiteInfoBean() Mec{_jiH&D
{//nSplitter的缺省值为5 8 4z6zFv?Q
//default value of nSplitter is 5 2
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this("","","",5); -&im