/* ~PP*k QZlJ
**SiteFileFetch.java S{{D G
*/ S9}P5;u
package NetFox; g4!zH};n
import java.io.*; _,_>B8
import java.net.*; o0&jel1a
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public class SiteFileFetch extends Thread { k1i*1Tc
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SiteInfoBean siteInfoBean = null; //文件信息Bean |[(4h
long[] nStartPos; //开始位置 =\`g<0
long[] nEndPos; //结束位置 0*YLFqN
FileSplitterFetch[] fileSplitterFetch; //子线程对象 ?Q;8D@
long nFileLength; //文件长度 N_Cu%HP
boolean bFirst = true; //是否第一次取文件 G*2bYsnhX
boolean bStop = false; //停止标志 0DhF3]
File tmpFile; //文件下载的临时信息 A;m)/@
DataOutputStream output; //输出到文件的输出流 ViQxOUE
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) l;}D| 6+_W
public SiteFileFetch(SiteInfoBean bean) throws IOException )VQ:L:1t(
{ Ox.&tW%@
siteInfoBean = bean; [[P?T^KT
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ;!DUN zl
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); E9HA8
if(tmpFile.exists ()) P\KP )bkC
{ j!GJ$yd=-6
bFirst = false; a{^[<
read_nPos(); >
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} 9"1 0:\U
else _$PZID
{ ,n TC7V
nStartPos = new long[bean.getNSplitter()]; 'm}K$h(U
nEndPos = new long[bean.getNSplitter()]; db`xlvrCY
} Mz#
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} ))cL+r
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public void run() ;X-~C.7k
{ FFb`4.
//获得文件长度 ]WR+>)ERb
//分割文件 /cF
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//实例FileSplitterFetch {ER!
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//启动FileSplitterFetch线程 SY>i@s+ML
//等待子线程返回 4]A2Jl
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try{ J?Brnf.
if(bFirst) /c'3I
{ wO&`3Q3~$
nFileLength = getFileSize(); @B
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if(nFileLength == -1) lrB@n?hk
{ /9 NQ u
System.err.println("File Length is not known!"); I8@NQ=UV0
} &1YqPk
else if(nFileLength == -2) PN[
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{
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System.err.println("File is not access!"); uFOxb}a9v
} fs+l
else (xpj?zlmM
{ =`[08
for(int i=0;i<nStartPos.length;i++) =Ig'Aw$ x
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); 3P~I'FQ
} u@5vK2
for(int i=0;i<nEndPos.length-1;i++) /:d03N\9k
{ oGx OJyD
nEndPos = nStartPos[i+1]; _R<eWp
} ewg&DBbN"
nEndPos[nEndPos.length-1] = nFileLength; Gf\Dc
} LvgNdVJDP|
} [>QV^2'Z
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//启动子线程 MKLnt X
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; $,4;_4t
for(int i=0;i<nStartPos.length;i++) 5n!
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{ 3US}('
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), S%<RV6{aiM
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), \.y|=Ql_u
nStartPos,nEndPos,i); IJ2 ]2FI
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); tp<uN~rTgh
fileSplitterFetch.start(); 3?SofPtc/
} xZW6Hk_
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), *CZvi0&
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); m d:$OC3
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Y~EKMowI&e
nEndPos = " + nFileLength); {i y[8eLg
// fileSplitterFetch[nPos.length-1].start(); 3XdN\xc
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//等待子线程结束 $Nvt:X_
//int count = 0; PhW<)B]
//是否结束while循环 #D M%_HXDi
boolean breakWhile = false; {Ak{
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while(!bStop) H_KE^1
{ R}njFQvS)
write_nPos(); QLrFAV
Utility.sleep(500); Wc [@,
breakWhile = true; a)=WDRk
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for(int i=0;i<nStartPos.length;i++) rStfluPL
{ l[lUmE
if(!fileSplitterFetch.bDownOver) yPrp:%PS
{ UOHU1.3$T
breakWhile = false; rU<NHFGj4
break; s''?:
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} h1@|UxaE#
} }[XzM/t
if(breakWhile) g\;AU2?p7
break; 3kFSu
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//count++; ufAp7m@ud
//if(count>4) =<w6yeko
// siteStop(); d!kiWmw,
} wJ@8-H 8}
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System.err.println("文件下载结束!"); 9XWHr/-_@
} )w];eF0c
catch(Exception e){e.printStackTrace ();} 6z
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} H|_^T.n?E
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//获得文件长度 +shT}$cb1
public long getFileSize() ;@p2s'(
{ `3+yu'
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int nFileLength = -1; G0Zq:kJ
try{ tn\Y:
URL url = new URL(siteInfoBean.getSSiteURL()); a$ a+3}\
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )R$+dPu>
httpConnection.setRequestProperty("User-Agent","NetFox"); a7'.*H]
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int responseCode=httpConnection.getResponseCode(); 7NC"}JB&
if(responseCode>=400) 'W>Bz,M6yo
{ WmU4~.
processErrorCode(responseCode); pFi.?|6"
return -2; //-2 represent access is error & V:q}Q
} 1~:7W
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String sHeader; bK;I:JK3
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for(int i=1;;i++) *0]E4]ZO
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Qr]xj7\@i
//Utility.log(in.readLine()); Q4e*Z9YJ
sHeader=httpConnection.getHeaderFieldKey(i); H&jK|]UXoO
if(sHeader!=null) Sx)b~ *
{ $3>k/*=
if(sHeader.equals("Content-Length")) ,JIjAm*2
{ {a`t1oX(
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Jj+|>(P
break; ]-"~?
} s\ft:a@
} $z,lq#zzl
else t"M&Yy
break; 0,+RF"R
} %T@ 3-V_
} Cj31>k1
catch(IOException e){e.printStackTrace ();} ?B
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catch(Exception e){e.printStackTrace ();} P#-9{T
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Utility.log(nFileLength); )6U&^9=
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return nFileLength; K] ;`
} {3=M-U~r
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//保存下载信息(文件指针位置) \GYh"5
private void write_nPos() T0BFit6
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try{ u&Q2/Y
output = new DataOutputStream(new FileOutputStream(tmpFile)); ol]"r5#Q_H
output.writeInt(nStartPos.length); _mVq9nBEf
for(int i=0;i<nStartPos.length;i++) ~EJVlji
{ ufF$7@(+
// output.writeLong(nPos); $YuVM
output.writeLong(fileSplitterFetch.nStartPos); SrGX4
output.writeLong(fileSplitterFetch.nEndPos); P2_UQ
} tDj~+lmdN
output.close(); ;=\vm"I?
} Uywi,9f
catch(IOException e){e.printStackTrace ();} !K a!f1
catch(Exception e){e.printStackTrace ();} >DX\^86x
} q\wT[W31@
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//读取保存的下载信息(文件指针位置) &K2J$(.t
private void read_nPos() .OFwGOL%
{ ,{wA%Oy,
try{ dL;C4[(N
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); %oVoE2T{@
int nCount = input.readInt(); q]Y [W1
nStartPos = new long[nCount]; 4oW6&1
nEndPos = new long[nCount]; Y1RiuJtL
for(int i=0;i<nStartPos.length;i++) <=WSX{_D
{ 1F?`.~q
nStartPos = input.readLong(); L=Cm0q 3v
nEndPos = input.readLong(); UHr0J jQK
} y4* }E
input.close(); sevaNs
} p)l >bC?3
catch(IOException e){e.printStackTrace ();} L3[r7 b
catch(Exception e){e.printStackTrace ();} [/_M!&zz2
} =7%1]
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private void processErrorCode(int nErrorCode) UeNa
{ 7hAFK
System.err.println("Error Code : " + nErrorCode); #wz1uw[pI!
} i'Vrx(y3
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//停止文件下载 Fy1@B(V%
public void siteStop() /C)mx#h]
{ ,<iJ#$:
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bStop = true; !YD~o/t@|
for(int i=0;i<nStartPos.length;i++) &"!s +_
fileSplitterFetch.splitterStop(); ^6&?R?y
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} ?VC[%sjwn
} G#{
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//负责部分文件的抓取 ",wv*z)_>
**FileSplitterFetch.java . ]
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*/ s;oDwT1
package NetFox; i=b<Mz7|
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import java.io.*; 'N1_:$z@(
import java.net.*; }yM /z
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public class FileSplitterFetch extends Thread { ]fc9m~0N,\
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String sURL; //File URL 5Fh?YS =
long nStartPos; //File Snippet Start Position a<AT;Tc
long nEndPos; //File Snippet End Position ;3ZHm*xJx
int nThreadID; //Thread's ID Y{c_5YYf
boolean bDownOver = false; //Downing is over "4W@p'
boolean bStop = false; //Stop identical RU}
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FileAccessI fileAccessI = null; //File Access interface cEkf9:_La
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException K_\fO|<k
{ 7A7=~:l\G
this.sURL = sURL; l| 1O9I0Gd
this.nStartPos = nStart; #"tHT<8 u
this.nEndPos = nEnd; JNY;;9o
nThreadID = id; =HJ)!(
fileAccessI = new FileAccessI(sName,nStartPos);//定位 tqI]S
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} th&?
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public void run() q5X\wz2N
{ |e+8Xz1>
while(nStartPos < nEndPos && !bStop) S`,(10Y
{ ~ Iin|
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try{ W<Ms0
URL url = new URL(sURL); #vk-zx*v7=
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); H>8B$fi )$
httpConnection.setRequestProperty("User-Agent","NetFox"); 5xJyW`SWz
String sProperty = "bytes="+nStartPos+"-"; ?m&?BsW$)
httpConnection.setRequestProperty("RANGE",sProperty); /S}0u}jID?
Utility.log(sProperty); L2"fO
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InputStream input = httpConnection.getInputStream(); \@yx;}bdI
//logResponseHead(httpConnection); dB{o-R
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byte[] b = new byte[1024]; Tac7+=T
int nRead; JffjGf-o
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) N[$bP)h7
{ .
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nStartPos += fileAccessI.write(b,0,nRead); d*7nz=0&$
//if(nThreadID == 1) L<HJ!
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); S\7-u\)
} PoyY}Ra
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Utility.log("Thread " + nThreadID + " is over!"); r:h\{DVf
bDownOver = true; OnO56,+S^
//nPos = fileAccessI.write (b,0,nRead); Q;p?.GI?-
} oqzx}?0
catch(Exception e){e.printStackTrace ();} +5n,/YjS`
} xO8-vmf2
} :1Jg;G
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//打印回应的头信息 J}?F4
public void logResponseHead(HttpURLConnection con) *P4G}9B|9:
{ c_#\'yeW
for(int i=1;;i++) I!IWmU6FN
{ 3QL I|VpO
String header=con.getHeaderFieldKey(i); gXtyl]K:
if(header!=null) Q+e|;Mj
//responseHeaders.put(header,httpConnection.getHeaderField(header)); plL##?<D<
Utility.log(header+" : "+con.getHeaderField(header)); RS&l68[6
else g'G"`)~ 2
break; x1['+!01
} HX1RA5O
} w6C0]vh
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public void splitterStop() Fb#_(I[aj
{ 8l(_{Y5(-
bStop = true; fVCpG~&t
} w_-v!s2
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} 8BUPvaP<[
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/* xA|72!zk0P
**FileAccess.java Fl,(KSTz
*//文件访问(定位,写) c}9.Or`?
package NetFox; YGVj$\
import java.io.*; UEeD Nl$^u
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public class FileAccessI implements Serializable{ =,B44:`r
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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 6onFf* m!x
RandomAccessFile oSavedFile; b/N+X}VMN
long nPos; %%[ "&
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public FileAccessI() throws IOException s{v!jZ
{ AH$D./a
this("",0); [d="94Ab
} FX
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public FileAccessI(String sName,long nPos) throws IOException .
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{ 69)- )en
oSavedFile = new RandomAccessFile(sName,"rw"); 8c-r;DE
this.nPos = nPos; <Wgp$qt;
oSavedFile.seek(nPos); O)g\/uRy
} D/1{v
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public synchronized int write(byte[] b,int nStart,int nLen) Ba$&4?8
{ HIUB:
int n = -1; 4(5NHsvp
try{ W0GDn
oSavedFile.write(b,nStart,nLen); 5VWyc9Q
n = nLen; Q/EHvb]
} Y<lJj"G
catch(IOException e) m44Ab6gpsb
{ Bi7QYi/
e.printStackTrace (); '8+<^%c
} 1m$:Rn^
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return n; x9UF
} +Tnn'^4
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} zS]8ma
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/* #*QnO\.
**SiteInfoBean.java rPf<8oH
*/ 9ohaU
package NetFox; ]"Y?
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public class SiteInfoBean { fUy:TCS
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private String sSiteURL; //Site's URL R-Y07A
private String sFilePath; //Saved File's Path oWg"f*
private String sFileName; //Saved File's Name {C6,h#|pg
private int nSplitter; //Count of Splited Downloading File 5U[m]W=B
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public SiteInfoBean() ~ ;CnwG
{//nSplitter的缺省值为5 B(+J?0Dj
//default value of nSplitter is 5 N"A863>
this("","","",5); 0Z. bd=H
} X?PcEAi;w
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) E0 ~\ A;
{ g\;&Z
sSiteURL= sURL; !Z f<
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sFilePath = sPath; J]|Zh
sFileName = sName; sFhmp
this.nSplitter = nSpiltter; HV_5
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} 565UxG
}
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public String getSSiteURL() "UUzLa_
{ ;JQ:S~K9
return sSiteURL; q]}fW)r
} ;onhc*{lv
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public void setSSiteURL(String value) z"[}Sk
{ l_ Eeus
sSiteURL = value; (MfPu8j
} eiTG
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public String getSFilePath() QLr.5Wcg>
{ AXK6AZjX
return sFilePath; 7RE'KH_$
} IdP"]Sv{<
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public void setSFilePath(String value) {,kA'Px)
{ ZboY]1L[j
sFilePath = value; VZ69s{/.B
} PcxCal4
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public String getSFileName() IYZ$a/{P
{ 3m2hB%SNb
return sFileName; $F^p5EXkc6
} H_ecb;|mP
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public void setSFileName(String value) 25bLU?x5B
{ ZA1u
sFileName = value; D\"F ?>
} #`kLU:
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public int getNSplitter() x(r>iy
{ TOH!vQP
return nSplitter; h 3.6<vM
} 57nSyd]PR
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public void setNSplitter(int nCount) P&3Z,f0
{ ^seb8o7
nSplitter = nCount;
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} i.~*G8!DM
} c5vi Y|C^
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/* r]6X
**Utility.java ;";#{B:
*/ ^nPk;%`0
package NetFox;
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public class Utility { -~PiPYX
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public Utility() #YEOY#
{ uaiCyh1:
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} dc]D 8KX
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//线程睡眠 cz{5-;$9Z
public static void sleep(int nSecond) TmH'_t.*T~
{ @_:Jm
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try{ |_ChK6Q?v
Thread.sleep(nSecond); =~|:93]k
} 8M5a&