/* 5s`r&2 w
**SiteFileFetch.java 8UqH"^9.Q7
*/ n\JI7A}
package NetFox; 2l^_OrE!
import java.io.*; 7C,giCYU
import java.net.*; y)CvlI
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public class SiteFileFetch extends Thread { jY]51B
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SiteInfoBean siteInfoBean = null; //文件信息Bean *L$_80
long[] nStartPos; //开始位置 " r o'?
long[] nEndPos; //结束位置 yRXWd*9
FileSplitterFetch[] fileSplitterFetch; //子线程对象 ms&1P
long nFileLength; //文件长度 v~x4Y,m%
boolean bFirst = true; //是否第一次取文件 OHsA]7S
boolean bStop = false; //停止标志 ci$J?a
File tmpFile; //文件下载的临时信息 Ef28
DataOutputStream output; //输出到文件的输出流 *KY:U&*
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) m|c[C\)By
public SiteFileFetch(SiteInfoBean bean) throws IOException vgD+Y
{ GQ7uxdqWBQ
siteInfoBean = bean; NlKVl~_ C
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); )OxcCV?5Z
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); rVl 8?uy
if(tmpFile.exists ()) fi`\e
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{ (tg9"C
bFirst = false; [YHtBM:y
read_nPos(); (=Kv1
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} o.0tD
else \U>&W
{ VwPoQ9pIS
nStartPos = new long[bean.getNSplitter()]; "NGfT:HV
nEndPos = new long[bean.getNSplitter()]; [xr^t1
} )E>yoUhN
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} yV\%K6d|3&
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public void run() PS+~JwD Uc
{ NLG\*mQ
//获得文件长度 4\
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//分割文件 -$[&{.B.
//实例FileSplitterFetch 1Z @sh>X|
//启动FileSplitterFetch线程 =f{v:n6
//等待子线程返回 rz
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try{ >$L7J=Em
if(bFirst) 2tpu v(H;
{ C)EP;5k'!\
nFileLength = getFileSize(); A`Y^qXFb`
if(nFileLength == -1) It&CM,=t
{ z06,$OYz
System.err.println("File Length is not known!"); /YHO"4Z
} d-+jb<C&
else if(nFileLength == -2) w3);ZQ|
{ U{M3QOF
System.err.println("File is not access!"); d9;&Y?fp
} &|#[.ti1
else 2(@2z[eKr
{ xwof[BnEZ
for(int i=0;i<nStartPos.length;i++) |`#fX(=
{ 0
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); L#byYB;E{
} T[k$ [
for(int i=0;i<nEndPos.length-1;i++) |y eQz
{ 0h*Le
nEndPos = nStartPos[i+1]; <;PKec
} J*$%d1
nEndPos[nEndPos.length-1] = nFileLength; $$1t4=Pz
} Zdqm|_R[
} |;wc8;
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//启动子线程
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fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ^?+[yvq
for(int i=0;i<nStartPos.length;i++) P{6$".kIY
{ Rq5'=L
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), '!7>*<
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), '%[ Y
nStartPos,nEndPos,i); goIvm:?
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ~. vridH
fileSplitterFetch.start(); {&IB[Y6
} ;98b SR/
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7UMZs7L$
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 0HoHu*+FX
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", aM;SE9/U
nEndPos = " + nFileLength); :) lG}c
// fileSplitterFetch[nPos.length-1].start(); |di(hY|
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//等待子线程结束 .k]`z>uv
//int count = 0; (is' ,4^b
//是否结束while循环 $ItmYj.m
boolean breakWhile = false; s"`~Xnf
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while(!bStop) j}ob7O&U'w
{ =?6c&Z
write_nPos(); [8sYE h
Utility.sleep(500); ,X^3.ILz
breakWhile = true; 8O'bCBhv
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for(int i=0;i<nStartPos.length;i++) :kR>wX
{ c#{lXS^
if(!fileSplitterFetch.bDownOver) =6Ok4Z
{ iF^qbh%%E
breakWhile = false; ^:{8z;w!(
break; xX%ppD7
} \(i'i C
} l[$GOLeS
if(breakWhile) cj>UxU][eS
break; 7s?#y=M
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//count++; . fja;aG
//if(count>4) e+lun
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// siteStop(); agx8 *x
} `CS\"|z
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System.err.println("文件下载结束!"); {q)d
} H_RfIX)X
catch(Exception e){e.printStackTrace ();} iN
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} %(W&(eN
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//获得文件长度 0* F` h
public long getFileSize() f
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{ E,Rj;?
int nFileLength = -1; UF!qp
try{ d*d:-f~q
URL url = new URL(siteInfoBean.getSSiteURL()); 3O2G+G2
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); rH`\UZ{cc
httpConnection.setRequestProperty("User-Agent","NetFox"); prj(
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int responseCode=httpConnection.getResponseCode(); i;1pw_K
if(responseCode>=400) @FN|=?8%
{ nKm#
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processErrorCode(responseCode); p [C
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return -2; //-2 represent access is error 0 MK}
} 5VTVx1P[8
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String sHeader; -n 9&W
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for(int i=1;;i++) T&'Jc
{ ?A|JKOst]
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); wPM>-F
//Utility.log(in.readLine()); bHG<B
sHeader=httpConnection.getHeaderFieldKey(i); v-z%3x.f
if(sHeader!=null) Ih:Q}V#6
{ dzOco)y
if(sHeader.equals("Content-Length")) kku<0<(N
{ JI.=y5I
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); _s5^\~ao
break; H}kZ;8
} [ *Dj:A)V^
} C~pas~
else %cSx`^`6j
break; ~Q_7HJ=^$
} X3}eq|r9
} cOV9g)7^O
catch(IOException e){e.printStackTrace ();} M)oKtiav*
catch(Exception e){e.printStackTrace ();} 5FR#CQ
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Utility.log(nFileLength); 3Qe|'E,U
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return nFileLength; xZ`z+)
} (-WRZLOQ
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//保存下载信息(文件指针位置) .3C::~:
private void write_nPos() qqw P4ceG
{ ,kJ7c;:i
try{ >O\+ 9T@
output = new DataOutputStream(new FileOutputStream(tmpFile)); CK n2ZL
output.writeInt(nStartPos.length); _dm0*T ?
for(int i=0;i<nStartPos.length;i++) &qS%~h%2
{ u$R5Q{H_
// output.writeLong(nPos); ! eZls
output.writeLong(fileSplitterFetch.nStartPos); wU+r]SK@
output.writeLong(fileSplitterFetch.nEndPos); 7G_<+rn
} \~*<[.8~
output.close(); D:Q#%wJ
} o^~ZXF}
catch(IOException e){e.printStackTrace ();} g}0K@z3
catch(Exception e){e.printStackTrace ();} T$lV+[7
} .+1I>L
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//读取保存的下载信息(文件指针位置) 62HA[cr&)
private void read_nPos() 06]3+s{{
{ a5#G48'X
try{ hP+4{F*}-
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); |s!
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int nCount = input.readInt(); jM$bWtq2
nStartPos = new long[nCount]; qt@/
nEndPos = new long[nCount]; +4%~.,<_to
for(int i=0;i<nStartPos.length;i++) L-w3A:jk
{ lV^#[%
nStartPos = input.readLong(); ndLEIqOY
nEndPos = input.readLong(); ,RR{Y-
} p*c(dkOe8
input.close(); by>%}#M
} Z2M(euzfi3
catch(IOException e){e.printStackTrace ();} Y|LL]@Lv
catch(Exception e){e.printStackTrace ();} k";dK*hD,
} C!^A\T7p
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private void processErrorCode(int nErrorCode) ooJxE\L
{ `'s_5Ek
System.err.println("Error Code : " + nErrorCode); D Yf2V6'
} >;4q
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//停止文件下载 }9\_s*
public void siteStop() mvjx
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{ nKGQU,C
bStop = true; 9Do75S{(
for(int i=0;i<nStartPos.length;i++) $^fF}y6N
fileSplitterFetch.splitterStop(); 1TQ?Fxj
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} 73X*|g[O
} J-<P~9m~I
//负责部分文件的抓取 XDCm
**FileSplitterFetch.java 7N 0Bj!
*/ xK6`|/e
package NetFox; clU ?bF~e1
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import java.io.*; y7UU'k`
import java.net.*; tlQ6>v'
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public class FileSplitterFetch extends Thread { iO*5ClB
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String sURL; //File URL d=bKNA90
long nStartPos; //File Snippet Start Position Oz%6y
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long nEndPos; //File Snippet End Position #|E#Rkw!
int nThreadID; //Thread's ID 6ZIPe~`
boolean bDownOver = false; //Downing is over 01@WU1IN
boolean bStop = false; //Stop identical S Q:H2vvD
FileAccessI fileAccessI = null; //File Access interface :0y-n.-{
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException MPUyu(-%{
{ enPtW
this.sURL = sURL; y<6Sl6l*
this.nStartPos = nStart; ^4`x:6m
this.nEndPos = nEnd; p'LLzc##
nThreadID = id; E}4{{{r
fileAccessI = new FileAccessI(sName,nStartPos);//定位 9mHCms
} /UunWZ u%
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public void run() a&G{3#l
{ N>3{!K>/Y:
while(nStartPos < nEndPos && !bStop) R7rM$|n=o
{ d"n>Q Tn\
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try{ BaIpX<$T
URL url = new URL(sURL); nq?+b >//
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 75H!i$(*+
httpConnection.setRequestProperty("User-Agent","NetFox"); SHYekX
String sProperty = "bytes="+nStartPos+"-"; g"n>v
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httpConnection.setRequestProperty("RANGE",sProperty); TFb7P/g
Utility.log(sProperty); ]7<$1ta
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InputStream input = httpConnection.getInputStream(); e*'bY;8lo
//logResponseHead(httpConnection); }BS
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byte[] b = new byte[1024]; hvTc( 0;mB
int nRead; ,9G'1%z,
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^e^-1s
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{ agfDx^,
nStartPos += fileAccessI.write(b,0,nRead); L$c 1<7LU
//if(nThreadID == 1) 5(#z)T
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 7Q{&L#;
} 4wKCzPy
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Utility.log("Thread " + nThreadID + " is over!"); kVsX/~$
bDownOver = true; LiHJm-
//nPos = fileAccessI.write (b,0,nRead); Mm8_EjMp
} qDGx(d
catch(Exception e){e.printStackTrace ();} NblPVxS
} 8Q/cJ+&
} 4?@5JpC9VA
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//打印回应的头信息 "n3n-Y#'
public void logResponseHead(HttpURLConnection con) #vK99S2
{ EIzTbW{p
for(int i=1;;i++) e?(4lD)d
{ ^Vth;!o
String header=con.getHeaderFieldKey(i); Z .`+IN(>E
if(header!=null) t_I-6`8o]
//responseHeaders.put(header,httpConnection.getHeaderField(header)); nZj&Ma7R
Utility.log(header+" : "+con.getHeaderField(header)); pD P*
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else 6$PQ$
break; =^M Q 4
} %}b
} vB7]L9=@"
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public void splitterStop() lz0dt<8eP
{ 8B6(SQp%
bStop = true; U{EcV%C2
} -"Kjn`8
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} /!&eP3^
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/* M&Q&be84
**FileAccess.java tWZ8(E$
*//文件访问(定位,写) 0Q>
package NetFox; FFwu$S6e
import java.io.*; HRahBTd(z
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public class FileAccessI implements Serializable{ 'h&>K,U?5
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 +tkm,>s
RandomAccessFile oSavedFile; #?M[Q:
long nPos; p/ZgzHyF
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public FileAccessI() throws IOException Rz>@G>b:
{ p*$=EomY
this("",0); Rwj
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} 1N]-WCxQ
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public FileAccessI(String sName,long nPos) throws IOException `aMnTF5:
{ 9@h-q(-
oSavedFile = new RandomAccessFile(sName,"rw"); V?MaI.gj
this.nPos = nPos; +A
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oSavedFile.seek(nPos); "5,Cy3
} ,
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public synchronized int write(byte[] b,int nStart,int nLen) z5^Se!`5
{ suX^"Io%!
int n = -1; [mUC7Kpi
try{ q 3,p=ijJ
oSavedFile.write(b,nStart,nLen); l
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n = nLen; +^,&z}(
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} }i;!p
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catch(IOException e) i[vN3`*B
{ 'Um\m
e.printStackTrace (); sZa>+
} r_^]5C\
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return n; k~Y_%#_
} mk-L3H1@J3
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} >tkU+$;-
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/* rj eKG-Z@
**SiteInfoBean.java :n}t7+(>U
*/ DQ6pe)E|
package NetFox; lt l(SIi
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