/* W$W7U|Z9y+
**SiteFileFetch.java fXN;N&I
*/ btOC\bUMfD
package NetFox; N^)OlH
import java.io.*; ZHT.+X:_
import java.net.*; xAI<<[-
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public class SiteFileFetch extends Thread { ^t"\PpmK<d
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SiteInfoBean siteInfoBean = null; //文件信息Bean +.=a
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long[] nStartPos; //开始位置 kci H
long[] nEndPos; //结束位置 F n\)*; ^
FileSplitterFetch[] fileSplitterFetch; //子线程对象 2neiUNT
long nFileLength; //文件长度 xGqZ8v`v
boolean bFirst = true; //是否第一次取文件 Lt)t}0
boolean bStop = false; //停止标志 vCJjZ%eO%D
File tmpFile; //文件下载的临时信息 :mij%nQ>$
DataOutputStream output; //输出到文件的输出流 BkcOsJIz
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) jGt[[s
public SiteFileFetch(SiteInfoBean bean) throws IOException p&7>G-.
{ ,,?t>|3
siteInfoBean = bean; KF.?b]
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ~o+u: ]
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); j=7 ]"%
if(tmpFile.exists ()) `'~|DG}a
{ hod|o1C&
bFirst = false; #8'%CUF*<8
read_nPos(); OHB!ec6W
} oD.f/hi0|
else Fw|5A"9'a'
{ iS"rMgq
nStartPos = new long[bean.getNSplitter()]; B;EdLs}
nEndPos = new long[bean.getNSplitter()]; ,E_hG3}}
} ]5^u^
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} BQm H9g|2
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public void run() I)6)~[:'
{ %f@]-
//获得文件长度 T^"d%au
//分割文件 b747 eR 7E
//实例FileSplitterFetch lGxG$0`;;
//启动FileSplitterFetch线程 46*?hA7@r(
//等待子线程返回 "kMpa]<c-6
try{ bH&[O`vf
if(bFirst) IE3GM^7\
{ doG&qXw
nFileLength = getFileSize(); )yjHABGJ
if(nFileLength == -1) &AW?!rH
{ `jP6;i
System.err.println("File Length is not known!"); DJeG
} b.$Gc!g
else if(nFileLength == -2) &cZD{Z
{ K%S k{'
System.err.println("File is not access!"); Zf|f $1-
} xD1w#FMlQs
else bY#>
{ ^NP" m
for(int i=0;i<nStartPos.length;i++) ^Xh9:OBF
{ hd\iW7
nStartPos = (long)(i*(nFileLength/nStartPos.length)); \i{=%[c
} {W@Y4Qqq
for(int i=0;i<nEndPos.length-1;i++) JTx&_Ok#
{ 98x(2fCvF(
nEndPos = nStartPos[i+1]; mgS%YG
} @n<WM@|l
nEndPos[nEndPos.length-1] = nFileLength; B;^7Yu0,
} (d_{+O"
} _,5(HETE2
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//启动子线程 # *\PU
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; dq[CT
for(int i=0;i<nStartPos.length;i++) N1_nBQF )
{ ^/c&Ud
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =8[HC}s|$
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 0LxA+
nStartPos,nEndPos,i); ;gf^;%FK
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); w+PbT6;
fileSplitterFetch.start(); O0wD"V^W
} }nuhLt1
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), \07
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 8eL[,uw
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", V"gnG](2l
nEndPos = " + nFileLength); &AC-?R|Dp
// fileSplitterFetch[nPos.length-1].start(); ;[&g`%-H<
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//等待子线程结束 `XQM)A
//int count = 0; 74QWGw`,
//是否结束while循环 n
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boolean breakWhile = false; iz>a0~(K
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while(!bStop) v]c1|?9p'
{ M++*AZ
write_nPos(); A-uEZj_RD=
Utility.sleep(500); r'-)@|
breakWhile = true; LDO@$jg
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for(int i=0;i<nStartPos.length;i++) ]e 81O#t3
{ R:zjEhH)
if(!fileSplitterFetch.bDownOver) 8z\WyDz
{ cvi+AZ=
breakWhile = false; _<&IpT{w+
break; mq>Ag
} 8&B{bS
} #NwlKZ-
if(breakWhile) Sw>AgES
break; zAS&L%^ tV
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//count++; { 6*h';~
//if(count>4) 's+ Fd~'
// siteStop(); TAIcp*)ZM
} W%@6D|^
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System.err.println("文件下载结束!"); j?#S M!f
} e$fxC-sZ
catch(Exception e){e.printStackTrace ();} c(i-~_
} s9zdg"c'
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//获得文件长度 >DpnIWn
public long getFileSize() rQ
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{ pO4}6\1\
int nFileLength = -1; p~En~?<
try{ 3T%WfS+
URL url = new URL(siteInfoBean.getSSiteURL()); aa8WRf
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /&Khk #
httpConnection.setRequestProperty("User-Agent","NetFox"); 8tY],
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int responseCode=httpConnection.getResponseCode(); FX4](oM
if(responseCode>=400) RV.*_FG
{ 52,p CyU
processErrorCode(responseCode); wqK>=Ri_
return -2; //-2 represent access is error [-=PK\ B
} Rq<T2}K
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String sHeader; ;XRLp:y
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for(int i=1;;i++) (Rve<n6{A
{ ?yU|;my
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); s-J>(|
//Utility.log(in.readLine()); S2@[F\|r
sHeader=httpConnection.getHeaderFieldKey(i); :I1)=8lO
if(sHeader!=null) FU E/uh
{ bBb$0HOF
if(sHeader.equals("Content-Length")) t=d~\_Oa
{ 80x
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nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); #db8ur3?
break; :w_Zr5H]
} { %vX/Ek
} ck){N?y
else -:h5Ky"
break; 5rr7lwWZ
} D\jRF-z
} z
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catch(IOException e){e.printStackTrace ();} 6Y>MW 4q
catch(Exception e){e.printStackTrace ();} Kzb&aOw
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Utility.log(nFileLength); No=Ig-It
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return nFileLength; ~*GJO74
} h
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//保存下载信息(文件指针位置) G|Yw
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private void write_nPos() q.yS j
{ ;cH|9m:Y
try{ WZ"NG|
output = new DataOutputStream(new FileOutputStream(tmpFile)); 7[rn
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output.writeInt(nStartPos.length); N6S0(%
for(int i=0;i<nStartPos.length;i++) y\$B9KX
{ dQVV0)z
// output.writeLong(nPos);
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output.writeLong(fileSplitterFetch.nStartPos); R]VY
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output.writeLong(fileSplitterFetch.nEndPos); f ?_YdVZ
} 1mm/Ssw:C
output.close(); CkE@Ll3Z
} hZ Gr/5f
catch(IOException e){e.printStackTrace ();} 8xJdK'
catch(Exception e){e.printStackTrace ();} G(~d1%(
} ^hv
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//读取保存的下载信息(文件指针位置) z9}rT<hy
private void read_nPos() d/!sHr69
{ R"Nvnpm
try{ O&.^67\|
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); I&l 1b>
int nCount = input.readInt(); []/=!?5B
nStartPos = new long[nCount]; :0$(umW@I"
nEndPos = new long[nCount]; i;;CU9`E2q
for(int i=0;i<nStartPos.length;i++) 8W)3rD>
{ k!H;(B"s-
nStartPos = input.readLong(); vmK<_xbwd
nEndPos = input.readLong(); s\_-` [B0
} -|B?pR
input.close(); 5Al59]
} !/znovoD
catch(IOException e){e.printStackTrace ();} JM!rop^
catch(Exception e){e.printStackTrace ();} M,"4r^%k
} d|k6#f-E
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private void processErrorCode(int nErrorCode) !SEHDRp
{ W -<E p<7{
System.err.println("Error Code : " + nErrorCode); LbOjKM^-
} Un@B D}@\
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//停止文件下载 z=<x.F
public void siteStop() `=Pn{JaD
{ Izm8
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bStop = true; y?GRxoCD"e
for(int i=0;i<nStartPos.length;i++) {LYA?w^GT
fileSplitterFetch.splitterStop(); pj;cL]L
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} A<2_V1
} `An|a~G1
//负责部分文件的抓取 !yU!ta Q
**FileSplitterFetch.java XKN`{h-@
*/ 7\@[e, ^9
package NetFox; v/=O:SM}
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import java.io.*; rD<G_%hP
import java.net.*; @;2,TY>Di
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public class FileSplitterFetch extends Thread { EpSVHD:*
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String sURL; //File URL SjV;&
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long nStartPos; //File Snippet Start Position |_/q0#"
long nEndPos; //File Snippet End Position wG6>.`:
int nThreadID; //Thread's ID Z12-Vps
boolean bDownOver = false; //Downing is over
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boolean bStop = false; //Stop identical ^+tAgK2
FileAccessI fileAccessI = null; //File Access interface U">w3o|
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException }/q]:3M|
{ W- 5Z"m1I
this.sURL = sURL; ce-5XqzY@
this.nStartPos = nStart; VCfa<hn
this.nEndPos = nEnd; `wz@l:e
nThreadID = id; BC0SSR@e
fileAccessI = new FileAccessI(sName,nStartPos);//定位 hw]x T5
} 9gR@Q%b)
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public void run() ,pL%,>R5
{ E+-ahvk
while(nStartPos < nEndPos && !bStop) F33&A<(,
{ _tDSG]
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try{ F_0vh;Jo
URL url = new URL(sURL); TY}9;QL:
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 'k[d&sR
httpConnection.setRequestProperty("User-Agent","NetFox"); +EG?8L,z
String sProperty = "bytes="+nStartPos+"-"; [)UL}vAO\q
httpConnection.setRequestProperty("RANGE",sProperty); &U/7D!^X
Utility.log(sProperty); W(U:D?e
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InputStream input = httpConnection.getInputStream(); 7`-f N|
//logResponseHead(httpConnection); l%XuYYQ
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byte[] b = new byte[1024]; ~5LlIpf36|
int nRead; 46`(u"RP
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ;LEO+,6
{ { ]Tb
nStartPos += fileAccessI.write(b,0,nRead); B^Y AKbY
//if(nThreadID == 1) 6t@kft>Nv
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); A'Q=DoE
} w5zrEk#
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Utility.log("Thread " + nThreadID + " is over!"); &("HH"!
bDownOver = true; D >ax<t1K
//nPos = fileAccessI.write (b,0,nRead); Hw[(v[v
} 1N8gH&oF
catch(Exception e){e.printStackTrace ();} TY,5]*86I&
} }i,LP1R
} o"h*@.
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//打印回应的头信息 J*HZ=6L
public void logResponseHead(HttpURLConnection con) XL!\Lx
{ $&IF#uDf
for(int i=1;;i++)
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{ @~WSWlQW
String header=con.getHeaderFieldKey(i); rBNl%+ sB
if(header!=null) )Pr*\<Cld
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 66RqjP '2
Utility.log(header+" : "+con.getHeaderField(header)); ,]CZ(q9-
else PeCU V6
break; x-W6W
} k)l*L1Y4:
} $:&?!>H
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public void splitterStop() E<=h6Ha
{ $~ 6Y\O
bStop = true; /eFudMl
} -TL `nGF
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} H~fX>6>
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/* J})#43P
**FileAccess.java b
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*//文件访问(定位,写) ;;6e
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package NetFox; (<.uvq61
import java.io.*; P1\:hh
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public class FileAccessI implements Serializable{ [X9s\H
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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 zxo0:dyw7
RandomAccessFile oSavedFile; A'jw;{8NpF
long nPos; l8O12
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public FileAccessI() throws IOException /3]b!lFZZ
{ jGp|:!'w
this("",0); .JkcCEe{G
} C}})dL;(
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public FileAccessI(String sName,long nPos) throws IOException KN41kkN
{ HizMjJ|
oSavedFile = new RandomAccessFile(sName,"rw"); Muhq,>!U
this.nPos = nPos; tA,#!Z0
oSavedFile.seek(nPos); OfSy _#aEK
} x37pj)i/
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public synchronized int write(byte[] b,int nStart,int nLen) Hh|a(Zq,
{ O&ur|&v
int n = -1; ue YBD]3'
try{ w_*UFLMSqR
oSavedFile.write(b,nStart,nLen); !;[cm|<