/* 4^[}]'w
**SiteFileFetch.java +'['HQ)
*/ 3$N %iE6
package NetFox; *e3L4 7"G
import java.io.*; }u-S j/K
import java.net.*; .pIR/2U\F
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public class SiteFileFetch extends Thread { HKiVEg
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SiteInfoBean siteInfoBean = null; //文件信息Bean z/0yO@_D/q
long[] nStartPos; //开始位置 <F)w=_%&
long[] nEndPos; //结束位置 -|Yh/
FileSplitterFetch[] fileSplitterFetch; //子线程对象 <,@H;|mZ
long nFileLength; //文件长度 <DXmZ1
boolean bFirst = true; //是否第一次取文件 KIKq9 *
boolean bStop = false; //停止标志 4aN+}TkH@G
File tmpFile; //文件下载的临时信息 0n*rs=\VG
DataOutputStream output; //输出到文件的输出流 Wg`+u
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ~TG39*m
public SiteFileFetch(SiteInfoBean bean) throws IOException ?..i 4
{ eA1k)gjE
siteInfoBean = bean; (L
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); jy!f{dsC
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); f^!11/Wv
if(tmpFile.exists ()) q8?=*1g
{ XhE$&Ff
bFirst = false; Mr=}B6`
read_nPos(); #.)xm(Ys
}
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else L2CW'Hd
{ &@4.;u
nStartPos = new long[bean.getNSplitter()]; V;iL[
nEndPos = new long[bean.getNSplitter()]; dd\bI_
} D|TLTF"
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public void run() 1Q&cVxA"\
{ 0 NQ7#A
//获得文件长度 e=gboR
//分割文件 oMh~5
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//实例FileSplitterFetch |h^K M
//启动FileSplitterFetch线程 n> MD\ZS
//等待子线程返回 t/JOERw
try{ n 5~=qQK2
if(bFirst) |`w$|pm=
{ <ZigCo w
nFileLength = getFileSize(); AA))KBXq
if(nFileLength == -1) a?zR8$t|
{ j6n2dMRvSE
System.err.println("File Length is not known!"); $42Au2Jg
} _qY`KP"
else if(nFileLength == -2) 968Ac}OA
{ i^je.,Bi
System.err.println("File is not access!"); [urH a
} =LXvlt'Q34
else cJP'ShnCh
{ C0\%QXu
for(int i=0;i<nStartPos.length;i++) YO)')&
{ xJvLuzUD
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 5Xwk*@t2a
} r~)VGdB+
for(int i=0;i<nEndPos.length-1;i++) .r ~'(g{qt
{ shM{Y9~O9&
nEndPos = nStartPos[i+1]; UUl*f!&
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} wX-RQ[2X
nEndPos[nEndPos.length-1] = nFileLength; NmjzDN
} azvDvEWCQZ
} yrO?Np
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//启动子线程 XK1fHfCEa
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; PPN q:,
for(int i=0;i<nStartPos.length;i++) G-2EQ.
{ Ip>^O/}$1
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), NeY"6!;k
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), :OHSxb>[
nStartPos,nEndPos,i); >[K0=nA
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <E"*)Oi
fileSplitterFetch.start(); '#H&:Htm;L
} `Gf{z%/
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), * !X4P
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Z%Vr+)!4
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", fb/qoZ
nEndPos = " + nFileLength); l#Yx
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// fileSplitterFetch[nPos.length-1].start(); gyC^K3}
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//等待子线程结束 Wt(Kd5k0'2
//int count = 0; .
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//是否结束while循环 P2>:p%Z
boolean breakWhile = false; w.tW=z5
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while(!bStop) B-$+UE>%
{ _ ~|Q4AJ
write_nPos(); ?k"0w)8
Utility.sleep(500); A xf^hBP
breakWhile = true; U>oW~Z
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for(int i=0;i<nStartPos.length;i++)
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{ RXM}hqeG
if(!fileSplitterFetch.bDownOver) "tKNlHBu'
{ bhn5Lz$z
breakWhile = false; b]w[*<f?
break; /V#7=,,
} 5.dl>,
} <z',]hy
if(breakWhile) @/LiR>,
break; `&H04x"Y$>
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//count++; V;k#})_-
//if(count>4) .wD>Gs{sH[
// siteStop(); ^Wm*-4
} ?&6Q%IUW1
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System.err.println("文件下载结束!"); BR3wX4i\
} 5*Btb#:
catch(Exception e){e.printStackTrace ();} -8/ JP
} FJ}gUs{m
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//获得文件长度 IhfZLE.,
public long getFileSize() TVYz3~m
{ QAi1,+y]7w
int nFileLength = -1; $C$ub&D
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try{ R1Yqz $#
URL url = new URL(siteInfoBean.getSSiteURL()); )%t7\1)B3
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); fq=:h\\G
httpConnection.setRequestProperty("User-Agent","NetFox"); {l@WCR
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int responseCode=httpConnection.getResponseCode(); m2Q$+p@
if(responseCode>=400) WU7cF81$
{ Bh,Q8%\6
processErrorCode(responseCode); n7S;
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return -2; //-2 represent access is error @<a|
} bM ^7g
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String sHeader; 7VY8CcL
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for(int i=1;;i++) Wt:~S/l
{ &//2eL
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); }2=hd. .
//Utility.log(in.readLine()); c})wD+1
sHeader=httpConnection.getHeaderFieldKey(i); :]-$dEu&
if(sHeader!=null) \FXp*FbQ
{ {:$NfW
if(sHeader.equals("Content-Length")) MO TE/JG
{ CbQ4Y
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); _ ~[M+IO
break; ^N{k6>;
} gvlFumg2
} 7 OWsHlU
else x9D/s`!
break; _@K YF)
} ?<6@^X"
}
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catch(IOException e){e.printStackTrace ();} @h9K
catch(Exception e){e.printStackTrace ();} K[]K53Nk
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Utility.log(nFileLength); -K^41W71
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return nFileLength; mrqaM2,(I
} B!uxs
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//保存下载信息(文件指针位置) ]'UgZsJ
private void write_nPos() OpUA{P
{ .
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try{ A2BRbwr>
output = new DataOutputStream(new FileOutputStream(tmpFile)); gyFr"9';c
output.writeInt(nStartPos.length); 0
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for(int i=0;i<nStartPos.length;i++) #9,=Owup
{ D2]ZMDL.
// output.writeLong(nPos); K~3Ebr
output.writeLong(fileSplitterFetch.nStartPos); &F`L}#oL&
output.writeLong(fileSplitterFetch.nEndPos); ^RDU
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} GW8CaTf~
output.close(); cm,4&x6
} uY]T:UVk
catch(IOException e){e.printStackTrace ();} QTE:K?
catch(Exception e){e.printStackTrace ();} IM]h*YV'
} dN0mYlu1|
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//读取保存的下载信息(文件指针位置) HzEGq,.
private void read_nPos() 3.FR C
{ ONfyYM?
try{ LuL$v+`
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ~j]dct7
int nCount = input.readInt(); 10O3Z9
nStartPos = new long[nCount]; O4!9{
nEndPos = new long[nCount]; 0Az/fzJlz
for(int i=0;i<nStartPos.length;i++) mw"}8y
{ b!,ja?
nStartPos = input.readLong(); f~R[&q+
nEndPos = input.readLong(); ofK='G.
} M}KZG'7
input.close(); j/'
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} =hhvmo
catch(IOException e){e.printStackTrace ();} H0+:XF\M
catch(Exception e){e.printStackTrace ();} RJwb@r<v
} [Xq<EEb
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private void processErrorCode(int nErrorCode) 8,y{q9O
{ vnZ4(
System.err.println("Error Code : " + nErrorCode); s-%J5_d f
} +N8aq<l
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//停止文件下载 J?,?fqb
public void siteStop() -f 4>MG
{ ^}hZ'<PK
bStop = true; Bz:&f46{
for(int i=0;i<nStartPos.length;i++) 3>M.]w6{
fileSplitterFetch.splitterStop(); q}sK
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} XECikld>
} #'8)u)!
//负责部分文件的抓取 )vQNiik#
**FileSplitterFetch.java PLdf_/]-
*/ G:DSWW}
package NetFox; o6|"J%9GX
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import java.io.*; Yw1Y-M
import java.net.*; CC>($k"
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public class FileSplitterFetch extends Thread { cCk1'D|X[e
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String sURL; //File URL z1FL8=
long nStartPos; //File Snippet Start Position f}%sO
long nEndPos; //File Snippet End Position ?;fv!'?%
int nThreadID; //Thread's ID pJn>oGeJ&
boolean bDownOver = false; //Downing is over $82zy q
boolean bStop = false; //Stop identical Yx!n*+ :J
FileAccessI fileAccessI = null; //File Access interface "raj>2@
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 418gcg6)
{ Rd0?zEKV
this.sURL = sURL; }FZp840
this.nStartPos = nStart; 6kC)\uy
this.nEndPos = nEnd; =^by0E2
nThreadID = id; bje'Oolc
fileAccessI = new FileAccessI(sName,nStartPos);//定位 j ~.u>4
} 0O_E\- =
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public void run() dbd"pR 8v
{ oR7 7`
while(nStartPos < nEndPos && !bStop) |NXFla
{ h%u?lW
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try{ =qan%=0"h
URL url = new URL(sURL); ,I=O"z>9
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); N!Rt;Xm2@
httpConnection.setRequestProperty("User-Agent","NetFox"); D8W(CE^}
String sProperty = "bytes="+nStartPos+"-"; }WoX9M; 1
httpConnection.setRequestProperty("RANGE",sProperty); =g1 D;
Utility.log(sProperty); N0=b[%g;n
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InputStream input = httpConnection.getInputStream(); Xp.|.)Od
//logResponseHead(httpConnection); Gtf1}UJC
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byte[] b = new byte[1024]; (Jm(}X]sh[
int nRead; )_WH#-}
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ~rp.jd 0l
{ *'s&/vEy
nStartPos += fileAccessI.write(b,0,nRead); iFY]0@yt
//if(nThreadID == 1) P"U>tsHK:
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
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} E\W;:p,{A
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Utility.log("Thread " + nThreadID + " is over!"); j@s=ER
bDownOver = true; rAtai}Lx
//nPos = fileAccessI.write (b,0,nRead); *vEU}SxRuv
} jp"XS
catch(Exception e){e.printStackTrace ();} 9*"[pt+tA
} 6f<*1YR
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} g4?Q.'dZr
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//打印回应的头信息 Ov F8&*A
public void logResponseHead(HttpURLConnection con) 9_I[o.q
{ O(b"F?
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for(int i=1;;i++) q=(M!9cE
{ "'Q$.sR
String header=con.getHeaderFieldKey(i); bf&.rJ0
if(header!=null) 6yV5Yjs
//responseHeaders.put(header,httpConnection.getHeaderField(header)); |s)VjS4@
Utility.log(header+" : "+con.getHeaderField(header)); fq)Ohb
else 3uB=L7.
break; Ih9O Rp7
} ]0at2
} &6=TtTp"9
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public void splitterStop() p7?CeyZ-V
{ E`
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bStop = true; 3Y.d&Nz
} I_R5\l}O+D
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} rF
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/* ][T9IAn
**FileAccess.java 2`q^Q
*//文件访问(定位,写) +?J_6Mo@X
package NetFox; M9ter&
import java.io.*; Y,<WX
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public class FileAccessI implements Serializable{ .~V".tZV[
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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 @eAGN|C5
RandomAccessFile oSavedFile; Ynk><0g6
long nPos; jSOa
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public FileAccessI() throws IOException vh:UXE lm
{ A1=$kzw{UH
this("",0); .lNnY8<
} [|m>vY!
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public FileAccessI(String sName,long nPos) throws IOException gn4g 43
{ hCOy\[2$
oSavedFile = new RandomAccessFile(sName,"rw"); .aAw7LW
this.nPos = nPos; z?IY3]v*z<
oSavedFile.seek(nPos); i85+p2i7
} |n-a\
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public synchronized int write(byte[] b,int nStart,int nLen) 3qV>TE]6,
{ ?L~=Z\H
int n = -1; x"h)"Y[c5
try{ h\: tUEg#J
oSavedFile.write(b,nStart,nLen); =":V
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n = nLen; k*UR#z(I
} jT wM<?
catch(IOException e) v=yI#5
{ g en3"\Og{
e.printStackTrace (); n<"a+TTU
} 5D02%U2N)G
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return n; KzFs#rhpn
} MlcoOi!
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} hnfrnYH
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/* R~seUW7uv"
**SiteInfoBean.java "l2N_xX;
*/ yI)RGOV
package NetFox; KI?1(L
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public class SiteInfoBean { ;r@R (Squ
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private String sSiteURL; //Site's URL yKk,);
private String sFilePath; //Saved File's Path Ul~}@^m]4}
private String sFileName; //Saved File's Name W2o8Fu
private int nSplitter; //Count of Splited Downloading File fN? Lz%z3
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public SiteInfoBean() #lVl?F+~
{//nSplitter的缺省值为5 [ QL<&:s&
//default value of nSplitter is 5 gu%'M:Xe
this("","","",5); 8@C|exAD`
} 2W-NCE%K)T
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) EA{*%9 A
{ z(#hL-{c
sSiteURL= sURL; $4~}_phi
sFilePath = sPath; OQb9ijLeK
sFileName = sName; Chi<)P$^
this.nSplitter = nSpiltter; {,mRMDEy
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} 9p'J(`
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public String getSSiteURL() (w:ACJ[[
{ *gpD4c7A\
return sSiteURL; Xq)%w#l5?
} eJ\j{-
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public void setSSiteURL(String value) U\GZ
{ G(3la3\(
sSiteURL = value; rxk{Li<9
} eu|q
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public String getSFilePath() ffd3QQ
{ nL20}"$E
return sFilePath; AFUl
} 5VoiDM=\c
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