/* EwT"uL*V;
**SiteFileFetch.java RJ&RTo
*/ k5e;fA/w
package NetFox; KC6.Fr{
import java.io.*; 5d^sA;c
import java.net.*; 69NeQ$](
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public class SiteFileFetch extends Thread { i$#;Kpb`^
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SiteInfoBean siteInfoBean = null; //文件信息Bean sb*G!8j
long[] nStartPos; //开始位置 !;{7-~
long[] nEndPos; //结束位置 HM1Fz\Sf
FileSplitterFetch[] fileSplitterFetch; //子线程对象 q`7PhA
long nFileLength; //文件长度 :\c ^*K(9
boolean bFirst = true; //是否第一次取文件 ie95rZp
boolean bStop = false; //停止标志 a#k6&3m&
File tmpFile; //文件下载的临时信息 &h)yro
DataOutputStream output; //输出到文件的输出流 6;d*r$0Fc
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ZvX*t)VjTz
public SiteFileFetch(SiteInfoBean bean) throws IOException ECuH%b^,
{ %)1?TU
siteInfoBean = bean; i9|Sa6vuI
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 7Q9 w?y~c
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); [l??A3G
if(tmpFile.exists ()) H$t_Xw==
{ ?e4YGOe.
bFirst = false; -@2iaQ(5a2
read_nPos();
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} k]|~>9eY]
else $8h%a
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{ lfgq=8d
nStartPos = new long[bean.getNSplitter()]; /Cr%{'Pzk
nEndPos = new long[bean.getNSplitter()]; xLajso1g69
} o:'MpKm
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} J]'zIOQ
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public void run() iWkWR"ysy
{ h,N?Ab'S
//获得文件长度 i1d'nxk6
//分割文件 EME|k{W
//实例FileSplitterFetch ;JT-kw6l5K
//启动FileSplitterFetch线程 `$9x 1dx
//等待子线程返回 a58H9w"u)
try{ fTec
if(bFirst) 9W5lSX#^;
{ *N<]Xy@
nFileLength = getFileSize(); V f&zL
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if(nFileLength == -1) "HIRTE;&
{ s ll\g
System.err.println("File Length is not known!"); ]F~dlH1Wp
} ="H`V V_
else if(nFileLength == -2) $s:aW^k
{ #c!lS<z
System.err.println("File is not access!"); 4+8@`f>s
} f$$ /H>MJ
else "KpGlY?^
{ H7n>Vx:L-
for(int i=0;i<nStartPos.length;i++) 0{D'n@veP
{ va@Lz&sAE%
nStartPos = (long)(i*(nFileLength/nStartPos.length)); k4J+J.|
} !F$6-0%
for(int i=0;i<nEndPos.length-1;i++) gwMNYMI
{ F$]Pk|,
nEndPos = nStartPos[i+1]; ZY+qA
} d#FQc18v}k
nEndPos[nEndPos.length-1] = nFileLength; oMa6(3T?E
} I\ob7X'Xu!
} lymCH
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//启动子线程 ^09,"<@k
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; &h/Xku&0
for(int i=0;i<nStartPos.length;i++) :"c*s4
{ TvbE2Q;/UL
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), DvvK^+-~
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Z FL~;_r
nStartPos,nEndPos,i); )y$(AJx$
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); #"~<HG}bR/
fileSplitterFetch.start(); y<Ot)fa$
} ~c `l@:
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +mn[5Y} :
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); q/,O\,
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Q;rX;p^W
nEndPos = " + nFileLength); "chDg(jMZ
// fileSplitterFetch[nPos.length-1].start(); e9B064
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//等待子线程结束 {`@G+JV~Jw
//int count = 0; b\2
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//是否结束while循环 %'pgGC"|
boolean breakWhile = false; I!K6o.|1
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while(!bStop) > ~O.@|
{ tWcHb #
write_nPos(); VOLj>w
Utility.sleep(500); gPPkT"
breakWhile = true; WNtW|IV
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for(int i=0;i<nStartPos.length;i++) <e6#lFQqK
{ OneY_<*a<
if(!fileSplitterFetch.bDownOver) D&y7-/
{ J|7 3.&B
breakWhile = false; >hIu2jm
break; &};zvo~P.
} +NUG
} abVmkdP_s
if(breakWhile) eHUOU>&P]
break; K[YyBEid
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//count++; ox.F%)eQ
//if(count>4) $XH^~i;
// siteStop(); OjA,]Gv6
} JBZ@'8eqi]
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System.err.println("文件下载结束!"); \ Cj7k^
} f|gg
catch(Exception e){e.printStackTrace ();} aN3;`~{9
} ?a]mDx>xh
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//获得文件长度 jebx40TA3
public long getFileSize() qH_Dc=~la
{ "m>81-0
int nFileLength = -1; Vxt+]5X
try{ BZ^}J!Q'*
URL url = new URL(siteInfoBean.getSSiteURL()); oXgcc*j
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )+Pus~w
httpConnection.setRequestProperty("User-Agent","NetFox"); 5"H=zJ=r
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int responseCode=httpConnection.getResponseCode(); 9lE_nc
if(responseCode>=400) >yDZw!C
{ [2cD:JL
processErrorCode(responseCode); mX|ojZ
return -2; //-2 represent access is error q@2siI~W
} pfI&E#:5
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String sHeader; e+K^Aq
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for(int i=1;;i++) Etm?'
{ g9F?z2^
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); bg0Wnl
//Utility.log(in.readLine()); \l3h0R
sHeader=httpConnection.getHeaderFieldKey(i); m#p'iU*va,
if(sHeader!=null) N{>n$v}
{ >
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if(sHeader.equals("Content-Length")) Rf1x`wml
{ akQ7K
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Oow2>F%_#
break; [Vt\$
} 8dhUBJ0_
} =vhm}
else <a+Z;>
break; QmIBaMI#
} a'IdYW0
} ?
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catch(IOException e){e.printStackTrace ();} E_LN]v
catch(Exception e){e.printStackTrace ();} I2Yz#V<%ru
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Utility.log(nFileLength); A5w6]: f2
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return nFileLength; J$v?T$LVw
} 1-QS~)+
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//保存下载信息(文件指针位置) W@!S%Y9
private void write_nPos() ;9g2?-svw
{ OZ!^ak
try{ L8 @1THY
output = new DataOutputStream(new FileOutputStream(tmpFile)); 3f;>" P}
output.writeInt(nStartPos.length); S21,VpW\
for(int i=0;i<nStartPos.length;i++) t0?\l)
{ POR\e|hRT]
// output.writeLong(nPos); L j$;:/G
output.writeLong(fileSplitterFetch.nStartPos); \nqS+on]
output.writeLong(fileSplitterFetch.nEndPos); G*v,GR
} }o{(S%%
output.close(); &jr3B;g!C
} KY]C6kh
catch(IOException e){e.printStackTrace ();} N,U8YO
catch(Exception e){e.printStackTrace ();} ;jTN| i'
} 7"xd1l?zz
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//读取保存的下载信息(文件指针位置) nt.y
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private void read_nPos() WOf 4o
{ 4v|W-h"K
try{ L&OwPd
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 61
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int nCount = input.readInt(); t&Og $@
nStartPos = new long[nCount]; BL58] P84
nEndPos = new long[nCount]; xAP+FWyV
for(int i=0;i<nStartPos.length;i++) $u6
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{ '[O;zJN;
nStartPos = input.readLong(); h `.& f
nEndPos = input.readLong(); y18Y:)DkL
} &G$Ucc
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input.close(); 9]@!S|1
} P
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catch(IOException e){e.printStackTrace ();} s&J]zb`
catch(Exception e){e.printStackTrace ();} R_xRp&5
} /|#fejPh
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private void processErrorCode(int nErrorCode) v74&BL]a
{ 0Fr?^3h
System.err.println("Error Code : " + nErrorCode); Oz#{S:24M+
} d*Fj3Wkx
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//停止文件下载 VOh4#%Vj
public void siteStop() $,fX:x
{ y L~W.H
bStop = true; 5QO9Q]I#_\
for(int i=0;i<nStartPos.length;i++) Jqi%|,/] N
fileSplitterFetch.splitterStop(); -C&P%tt Y
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} @!d{bQd,
}
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//负责部分文件的抓取 _8agtQ:<
**FileSplitterFetch.java $]2vvr
*/ !_Z&a
package NetFox; R_S.tT!
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import java.io.*; 2T[9f;jM'
import java.net.*; $a ` G
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public class FileSplitterFetch extends Thread { Nu~lsWyRI5
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String sURL; //File URL TrR8?-
long nStartPos; //File Snippet Start Position ]L}dzA?:
long nEndPos; //File Snippet End Position j^2j&Ta
int nThreadID; //Thread's ID v1,oilL
boolean bDownOver = false; //Downing is over gr-OHeid
boolean bStop = false; //Stop identical @49S`
FileAccessI fileAccessI = null; //File Access interface 0Pi:N{x8
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ('p5:d
{ P J[`|
this.sURL = sURL; R0
this.nStartPos = nStart; K@w{"7}
this.nEndPos = nEnd; 0NX,QD
nThreadID = id; b9dLt6d
fileAccessI = new FileAccessI(sName,nStartPos);//定位 0% I=d
} I4?5K@a
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public void run() ayF\nk4b
{ t}/( b/VD
while(nStartPos < nEndPos && !bStop) 2P{Gxz<#
{ [Cv/{f3]u{
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try{ u>
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URL url = new URL(sURL); z7$}#)Z7
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 6 cr^<]v !
httpConnection.setRequestProperty("User-Agent","NetFox"); Uc>LFX&
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String sProperty = "bytes="+nStartPos+"-"; o[H\{a>
httpConnection.setRequestProperty("RANGE",sProperty); |<2JQ[]
Utility.log(sProperty); iqlVlm>E
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InputStream input = httpConnection.getInputStream(); t;~-_{
//logResponseHead(httpConnection); FrgV@4'2G
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byte[] b = new byte[1024]; 7@\GU].2
int nRead; #s/{u
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while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) hG[4O3jo\
{ c8!j6\dC*
nStartPos += fileAccessI.write(b,0,nRead); )m> 6hk
//if(nThreadID == 1) Wpa$B
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// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); EsNk<Ra
} PH{c,
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Utility.log("Thread " + nThreadID + " is over!"); 's/27=o
bDownOver = true; >cSi/a,L
//nPos = fileAccessI.write (b,0,nRead); $R3.yX=[\
} %!#rrt,F
catch(Exception e){e.printStackTrace ();} =`ywd]\7
} `,Q <YT ~
} ]
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//打印回应的头信息 nN!vgn
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public void logResponseHead(HttpURLConnection con) la1D2 lM
{ MH2OqiCI
for(int i=1;;i++) <m:4g
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{ C!oksI
String header=con.getHeaderFieldKey(i); Rb yF#[}
if(header!=null) |^\Hv5
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ``/y=k/au
Utility.log(header+" : "+con.getHeaderField(header)); ?cA8P.?^A
else aslNlH 6
break; _g^E%@'W
} Rs^jk)Z:)
} x*k65WO\
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public void splitterStop() 20S9/9ll
{ fB@K'JQG
bStop = true; $a)JCErN
} hG< a
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} `,hW;p>-
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/* 5?S{W
**FileAccess.java []sB^UT
*//文件访问(定位,写) Y8{T.\%\+
package NetFox; M^!C?(Hx^x
import java.io.*; zWP.1 aA&
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public class FileAccessI implements Serializable{ A}
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 >;T$#LZ
RandomAccessFile oSavedFile; "P>$=X~Zi
long nPos; 5( mCBH
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public FileAccessI() throws IOException IF,i^,
{ %5( EkP
this("",0); :e5:\|5*5
} z_)OWWdN
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public FileAccessI(String sName,long nPos) throws IOException tU-#pB>H
{ "\wDS2M)
oSavedFile = new RandomAccessFile(sName,"rw"); FB?q/ _
this.nPos = nPos; c%6 @ z
oSavedFile.seek(nPos); Y`E{E|J
} Xs.$2
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