/* 3%+!qm
**SiteFileFetch.java HC=ZcK'W
*/ cQ]c!G|a4
package NetFox; k'_f?_PBu
import java.io.*; h% KEg667
import java.net.*; aAbA)'G
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public class SiteFileFetch extends Thread { c`/VYgcTqB
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SiteInfoBean siteInfoBean = null; //文件信息Bean {i+
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long[] nStartPos; //开始位置 {sf
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long[] nEndPos; //结束位置 HUMy\u84H
FileSplitterFetch[] fileSplitterFetch; //子线程对象 gV-*z}`U
long nFileLength; //文件长度 q1q9W@H
boolean bFirst = true; //是否第一次取文件 +;\w'dBi,
boolean bStop = false; //停止标志 }K={HW1>
File tmpFile; //文件下载的临时信息 'pT13RFD
DataOutputStream output; //输出到文件的输出流 ? )h8uf4
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) c9G%;U)
public SiteFileFetch(SiteInfoBean bean) throws IOException [-VK!9pQ
{ $ OG){'X
siteInfoBean = bean; ,oUzaEX
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Z.&/,UU:4
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ]tXIe?>9
if(tmpFile.exists ()) h
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{ +SF+$^T
bFirst = false; $#-rOi /
read_nPos(); (6B;
} %g:'6%26
else Y6&v&dA;
{ 'YB[4Q /0
nStartPos = new long[bean.getNSplitter()]; PJ;WNo8
nEndPos = new long[bean.getNSplitter()]; 5+11J[~{
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} `u}_O(A1pA
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public void run() U#cGd\b
{ #Lpw8b6
//获得文件长度 [Q{\Ik
//分割文件 ?)J/uU2w
//实例FileSplitterFetch D{s87h
//启动FileSplitterFetch线程 i%!<6K6UT
//等待子线程返回 "5L?RkFi\
try{ r-wCAk}m*?
if(bFirst) %'ah,2a%
{ 4~3
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nFileLength = getFileSize(); *~g*J^R}
if(nFileLength == -1) u.|%@
{ \wD/TLS}
System.err.println("File Length is not known!"); CV\^gTPmx
} EYn?YiVFU
else if(nFileLength == -2) w$/lq~zU
{ h$kz3r;b,"
System.err.println("File is not access!"); o S= !6h
} pH mqwB~|
else iphC\*F
{ iAZ8Y/
for(int i=0;i<nStartPos.length;i++) '=vZAV`
{ i_Hm?Bi!F
nStartPos = (long)(i*(nFileLength/nStartPos.length)); {PX,_
} J/'Fj?
for(int i=0;i<nEndPos.length-1;i++) gkO^J{_@q
{ ~1D^C |%
nEndPos = nStartPos[i+1]; 9c[X[Qc
} W,NqevXo:
nEndPos[nEndPos.length-1] = nFileLength; `X5!s
} >U,&V%y
} ttUK~%wSx
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//启动子线程 g%l ,a3"
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 'o6}g p)
for(int i=0;i<nStartPos.length;i++) ",3v%$>
{ 6w7;
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Nna.N U1
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), kW)3naUf<
nStartPos,nEndPos,i); u0Wt"d-=
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <HoCt8>U
fileSplitterFetch.start(); zI4rAsysL
} y
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 5aizWz
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); T8a' 6otc
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", y<kUGsD
nEndPos = " + nFileLength); &'$Bk5 D@G
// fileSplitterFetch[nPos.length-1].start(); $uHQl#!;
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//等待子线程结束 v']_)
//int count = 0; oh< -&3Jn
//是否结束while循环 +#MXeUX"
boolean breakWhile = false; O3@DU#N&s
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while(!bStop) ;:D-}t;
{ ;.uYWP|9
write_nPos(); #+1|O;PB#
Utility.sleep(500); -n.m "O3
breakWhile = true; yuZLsH
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for(int i=0;i<nStartPos.length;i++) n"htx|v
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if(!fileSplitterFetch.bDownOver) Jz`jN~
{ dhtH&:J<;
breakWhile = false; Q4m>
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break; 4j=3'Z|
} M5h
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} IFTNr2I
if(breakWhile) 20V~?xs~
break; = g{I`u
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//count++; K>DN6{hnV;
//if(count>4) Cq!eAc
// siteStop(); FE\E%_K'n7
} kw$7G1Q
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System.err.println("文件下载结束!"); rJ Jx8)M
} Cjf[]aNJe`
catch(Exception e){e.printStackTrace ();} 9VxM1-8Gs
} p-}X=O$
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//获得文件长度 Ei_~K';
public long getFileSize() cF8
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{ _/LGGt4&%
int nFileLength = -1; f\hMTebma$
try{ ]?4;Lw
URL url = new URL(siteInfoBean.getSSiteURL()); ~o!-[
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Vx $;wU Y
httpConnection.setRequestProperty("User-Agent","NetFox"); %Xd*2q4*
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int responseCode=httpConnection.getResponseCode(); n{;Q"\*Sg
if(responseCode>=400) 0 #8
{ 0(7 IsG=t
processErrorCode(responseCode); >}V?GK36
return -2; //-2 represent access is error tVRN3fJH
} `3F#k[IR
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String sHeader;
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for(int i=1;;i++) 5*$yY-A
{ O=2|'L'h!
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); I_<VGU k
//Utility.log(in.readLine()); 6j(/uF4!#
sHeader=httpConnection.getHeaderFieldKey(i); vUpAW[[
if(sHeader!=null) ^!1!l-
{ ">bhxXeiN
if(sHeader.equals("Content-Length")) ZIx-mC5
{ P4[kW}R
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); >$ZG=&
break; oN1D&*
} Wi&v?nm
} XR+
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else -$Z1X_~;)<
break; !rUP&DA
} l53i
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} >_?i)%+)
catch(IOException e){e.printStackTrace ();} TwkT|Piw
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catch(Exception e){e.printStackTrace ();} 4`,(*igEv
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Utility.log(nFileLength); 0#]fEi
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return nFileLength; 072C!F
} }emUpju<C
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//保存下载信息(文件指针位置) 1q7&WG
private void write_nPos() <VxA&bb7c
{ P-\f-FS
try{ -+WAaJ(b
output = new DataOutputStream(new FileOutputStream(tmpFile)); {zb'Z Yz
output.writeInt(nStartPos.length); i|^Q{3?o#
for(int i=0;i<nStartPos.length;i++) !UT'4Fs
{ ;@ePu
// output.writeLong(nPos); -8n1y[
output.writeLong(fileSplitterFetch.nStartPos);
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output.writeLong(fileSplitterFetch.nEndPos); $f
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} ]@$^Ju,
output.close(); cLZ D\1Mt
} P=n_wE
catch(IOException e){e.printStackTrace ();} Yqs=jTq`{
catch(Exception e){e.printStackTrace ();} ETHcZ
} z&%i"IY
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//读取保存的下载信息(文件指针位置) r{R-X3s
private void read_nPos() P~\rP6
;
{ MRLiiIrq,5
try{ B"GC|}N)v
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); :'p)xw4K|
int nCount = input.readInt(); *J-pAN
nStartPos = new long[nCount]; G8M~}I/)
nEndPos = new long[nCount]; 3:WqUb\QK
for(int i=0;i<nStartPos.length;i++) %OBW/Ti
{ 0<m7:D
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nStartPos = input.readLong(); &BPYlfB1
nEndPos = input.readLong(); gRY#pRT6d
} <<
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input.close(); Cf[tNq
} roS" q~GS,
catch(IOException e){e.printStackTrace ();} v,-Tk=qP
catch(Exception e){e.printStackTrace ();} v?`R8
} Q#p)?:o/
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private void processErrorCode(int nErrorCode) `yfZ{<
{ 0nwi5
System.err.println("Error Code : " + nErrorCode); <j'K7We/tP
} rbd0`J9fq
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//停止文件下载 JG!B3^qB
public void siteStop() >+%#m'Y&&
{ ~wa4kS<>
bStop = true; 8:TX9`,
for(int i=0;i<nStartPos.length;i++) 7:UeE~uB:
fileSplitterFetch.splitterStop(); d7V/#34
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} jW:7PS
} NljpkeX'
//负责部分文件的抓取 (ks>F=vk*
**FileSplitterFetch.java I*-\u
*/ 8&@=Anc&q
package NetFox; [5P-K{Ko
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import java.io.*; TZgtu+&
import java.net.*; E^-c,4'F
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public class FileSplitterFetch extends Thread { +p\E%<uQ
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String sURL; //File URL ? $B4'wc5
long nStartPos; //File Snippet Start Position Km5_P##
long nEndPos; //File Snippet End Position Gld~GyB\k
int nThreadID; //Thread's ID @)b'3~D
boolean bDownOver = false; //Downing is over ko}& X=
boolean bStop = false; //Stop identical ;<FAcR
FileAccessI fileAccessI = null; //File Access interface %j&vV>2
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException :BxO6@>Xc
{ H1-DK+Q:
this.sURL = sURL; BwHJr(n
this.nStartPos = nStart; )9 Q+07
this.nEndPos = nEnd; ,kJ'_mq
nThreadID = id; ,l&?%H9q
fileAccessI = new FileAccessI(sName,nStartPos);//定位 P@O_MT
} =i)%AnZ^9
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public void run() P`Zon
{ u$JAjA
while(nStartPos < nEndPos && !bStop) "(mJupI
{ I"x'
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try{ oywPPVxj
URL url = new URL(sURL); v/ry" W
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ranem0KQ)]
httpConnection.setRequestProperty("User-Agent","NetFox"); phDIUhL$z
String sProperty = "bytes="+nStartPos+"-"; 1L<TzQ
httpConnection.setRequestProperty("RANGE",sProperty); "==c
Utility.log(sProperty); "W5MZ
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InputStream input = httpConnection.getInputStream(); j}Tv/O,f
//logResponseHead(httpConnection); @*hv|zjs
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byte[] b = new byte[1024]; A ON
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int nRead; >)K3
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) !/}4_s`,
{ 6Jgl"Jw8
nStartPos += fileAccessI.write(b,0,nRead); rRevyTs
//if(nThreadID == 1) 8J,^O04<
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^$oa`B^2JM
} Apu-9|oP
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Utility.log("Thread " + nThreadID + " is over!"); C6gSj1
bDownOver = true; 6O/ L~Z*t
//nPos = fileAccessI.write (b,0,nRead); ~;(\a@ _
} t M5(&cQ!d
catch(Exception e){e.printStackTrace ();} z
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} 7O)ATb#up
} }6l:'nW
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//打印回应的头信息 4s
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public void logResponseHead(HttpURLConnection con) Y5E0n(Z
{ *l d)nH{
for(int i=1;;i++) VY/r2o#
{ /,:cbpHsu
String header=con.getHeaderFieldKey(i); /%m?D o
if(header!=null) nWelM2
//responseHeaders.put(header,httpConnection.getHeaderField(header)); }'<Z&NW6
Utility.log(header+" : "+con.getHeaderField(header)); moM'RO,M
else K14.!m
break; +Vg(2Xt
} bN?*p($/
} L@MCB-@V
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public void splitterStop() 9ZOQNN<ex
{ _
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bStop = true; kYS#P(1
} /;_$:`|/
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} @{V`g8P>
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/* i.9}bw
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**FileAccess.java ';eAaDM
*//文件访问(定位,写) .dzw5R&
package NetFox; 5@.8O VPz
import java.io.*; KUW )F
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public class FileAccessI implements Serializable{ qw4wg9w5p
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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 {(-TWh7V
RandomAccessFile oSavedFile; *)r_Y|vg
long nPos; (q"S0{
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public FileAccessI() throws IOException qUe2(/TQu
{ PJb/tKC
this("",0); f:q2JgX
} QdZHIgh`i
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public FileAccessI(String sName,long nPos) throws IOException \(Dm\7Q.
{ $xvwnbq#y
oSavedFile = new RandomAccessFile(sName,"rw"); -XECYwTh
this.nPos = nPos; +L?;g pVE&
oSavedFile.seek(nPos); = r=/L
} B%Oi1bO
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public synchronized int write(byte[] b,int nStart,int nLen) .O5|d+S
{ #;2mP6a[
int n = -1; W[!bF'-10
try{ };(2 na
oSavedFile.write(b,nStart,nLen); 1%.CtTi
n = nLen; ~O;?;@
} -?T|1FA,
catch(IOException e) ^-#:T
{ vO{[P#L}
e.printStackTrace (); 1iY?t
} Z_<Wr7D
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return n; c1%ki%J#
} 1
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} uN9.U _
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/* nNM)rW
**SiteInfoBean.java "^pF2JI
*/ 5tbi};
package NetFox; A-hWg;
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public class SiteInfoBean { =>C3IR/
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private String sSiteURL; //Site's URL [0NH#88ym<
private String sFilePath; //Saved File's Path <CP't[
private String sFileName; //Saved File's Name >>7m'-k%D
private int nSplitter; //Count of Splited Downloading File $_Lcw"xO
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public SiteInfoBean() C"}]PW
{//nSplitter的缺省值为5 /Bnh%6#ab
//default value of nSplitter is 5 IW|1)8d
this("","","",5); yw?UA
} +QrbW
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) }WkR-5N
{ T8QRO%t
sSiteURL= sURL; :'dH)yO
sFilePath = sPath; W{'tS{
sFileName = sName; !
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this.nSplitter = nSpiltter; !Ys.KDL
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} _1Iw"K49Qx
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public String getSSiteURL() ~_L_un.R
{ Jqi^Z*PuX
return sSiteURL; ?<$DQ%bf
} 0jwex
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public void setSSiteURL(String value) b{d@:"
{ t?kbN\,
sSiteURL = value; n|iO)L\9aB
} ^RS`q+g
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public String getSFilePath() q:v&wb%
{ RnkrI~x
return sFilePath; xBcE>^{1.
} X6@G)68
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public void setSFilePath(String value) PM%Gsy]q
{ *9Nq^+
sFilePath = value; Yf(QU`w_
} -z4pI=
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public String getSFileName() o;@T6-VH
{ jz;"]k
return sFileName; Dos`lh
} F\;G'dm
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public void setSFileName(String value) E|d 8vt
{ +Te;LJP
sFileName = value; sk_Q\0a
}
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public int getNSplitter() }A%Sx!7~
{ +H~})PeQ
return nSplitter; l;SqjkN
} anTS8b
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