/* w'_|X&@H
**SiteFileFetch.java +_vf=d
*/ J4j:nd
package NetFox; ME!P{ _/
import java.io.*; \+/ciPzA-
import java.net.*; \kY:|T
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public class SiteFileFetch extends Thread { i4WHjeo\
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SiteInfoBean siteInfoBean = null; //文件信息Bean 0wSy[z4V
long[] nStartPos; //开始位置 l O*
long[] nEndPos; //结束位置 Y}q~Km
FileSplitterFetch[] fileSplitterFetch; //子线程对象 VK,{Mu=.9
long nFileLength; //文件长度 wL]#]DiE
boolean bFirst = true; //是否第一次取文件 c68y\
boolean bStop = false; //停止标志
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File tmpFile; //文件下载的临时信息 So ~QZ%YA
DataOutputStream output; //输出到文件的输出流 c=?6`m,"M
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) q(R|3l^6T
public SiteFileFetch(SiteInfoBean bean) throws IOException /[/{m ]
{ ]B~(yh
siteInfoBean = bean; lk81IhI
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); S1~K.<B
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 'Ox "YE
if(tmpFile.exists ()) >o`+j$j
{ #4"eQ*.*"
bFirst = false; Uugq.'>
read_nPos(); UmMu|`
} <s|.2~
else m#O; 1/P
{ ;l0%yg/}
nStartPos = new long[bean.getNSplitter()]; ]BRwJ2< x
nEndPos = new long[bean.getNSplitter()]; i-p,x0th
} hgDFhbHtd6
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} ~ oq.y n/1
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public void run() aCIz(3^
{ ePaC8sd0
//获得文件长度 0jxXUWO
//分割文件 >XRf=
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//实例FileSplitterFetch gVJh@]8)
//启动FileSplitterFetch线程 ni )G
//等待子线程返回 u$ci{<
try{ k.)YFKi
if(bFirst) d$E>bo-\
{ t@+e#3P!
nFileLength = getFileSize(); 4 CiRh
if(nFileLength == -1) I4UsDs*BD
{ 9U3 }_
System.err.println("File Length is not known!"); O ]-8 %
} i=rA;2>
else if(nFileLength == -2) 'iwTvkf{
{ LtKR15h,
System.err.println("File is not access!"); [ws;|nh
} cf"!U+x
else R{aqn0M
{ w_~tY*IwB
for(int i=0;i<nStartPos.length;i++) f8f3[O!x
{ o~4kJW#
nStartPos = (long)(i*(nFileLength/nStartPos.length)); <1x u&Z7
} [x`),3qD
for(int i=0;i<nEndPos.length-1;i++) VtU2&
{ B(eiRr3
nEndPos = nStartPos[i+1]; f= }!c*l"
} <RH%FhT
nEndPos[nEndPos.length-1] = nFileLength; Y[rCF=ZVH
} W&I:z-VH
} 2'Kh>c2
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//启动子线程 ]S@DVXH
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 8W7ET@`
for(int i=0;i<nStartPos.length;i++) 7[R`52pP
{ fti0Tz'
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {`>pigo
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), SF ^$p$mC
nStartPos,nEndPos,i); S~|\bnE
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); q 4Ok$~"I
fileSplitterFetch.start(); $t5>1G1j7
} ew c:-2Y^
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~0Zy$L/D
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); \t&8J+%
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", a|]}uFr
nEndPos = " + nFileLength); N];K
// fileSplitterFetch[nPos.length-1].start(); s~5rP:
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//等待子线程结束 ,d^H Ag^j
//int count = 0; l Yj$3
//是否结束while循环 y^
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boolean breakWhile = false; $}0\sj%
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while(!bStop) :#N]s
{ jF#Dc[*
write_nPos(); Q5 o0!w
Utility.sleep(500); mK^E@uxN
breakWhile = true; Cw5B
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for(int i=0;i<nStartPos.length;i++) g<8Oezi 65
{ >I+p;V$@
if(!fileSplitterFetch.bDownOver) I(/*pa?m{
{ ArT@BqWd
breakWhile = false; *
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break; <?Z]h]C^o
} I &%
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} dI%N wl%
if(breakWhile) %T}*DC$&S
break; _]0<G8|Rv
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//count++; ]KUeSg|
//if(count>4) +Je%8jH
// siteStop(); [[ll4|
} fM(~>(q&
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System.err.println("文件下载结束!"); ^--8
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} Y7')~C`up^
catch(Exception e){e.printStackTrace ();} ?lU(FK
} aR)w~s\6
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//获得文件长度 |Rm_8n%m
public long getFileSize() /:C<{m.[}
{ @oD2_D2
int nFileLength = -1; n8z++T&
try{ L=I;0Ip9y
URL url = new URL(siteInfoBean.getSSiteURL()); (7"CYAe:;
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >H,E3Z
httpConnection.setRequestProperty("User-Agent","NetFox"); )E^Pn|H
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int responseCode=httpConnection.getResponseCode(); Ggbz
if(responseCode>=400) [<wpH0lNoy
{ p&
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processErrorCode(responseCode); A~<cp)E
return -2; //-2 represent access is error tF.N
} !L2!:_
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String sHeader; m\MI 6/
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for(int i=1;;i++) Fv:x>qZr@
{ \:2z!\iP`
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); VKSn \HT~
//Utility.log(in.readLine()); <s$Jj><
sHeader=httpConnection.getHeaderFieldKey(i); :G&:v
if(sHeader!=null) p!\GJ a",
{ B)dG:~
if(sHeader.equals("Content-Length")) BQ B<+o'
{ ^4et;
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nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); PO,zP9
break;
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} Q(4~r+
}
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else ]2A2<Q_,
break; $"MGu^0;1
} ;jBS:k?
} }nSu7)3$B
catch(IOException e){e.printStackTrace ();} DQ c pIV
catch(Exception e){e.printStackTrace ();} 86a,J3C[
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Utility.log(nFileLength); TV`sqKW
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return nFileLength; RMdU1@
} dV-6 l6
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//保存下载信息(文件指针位置) z0F55<i
private void write_nPos() {aUv>T"c
{ qxYCT$1
try{ 12: Q`
output = new DataOutputStream(new FileOutputStream(tmpFile)); 9D;ono3
output.writeInt(nStartPos.length); ,uO_C(G/i
for(int i=0;i<nStartPos.length;i++) -OnKvpeI
{ KcW 5
// output.writeLong(nPos); qOa*JA`
output.writeLong(fileSplitterFetch.nStartPos); ]cMZ7V^
output.writeLong(fileSplitterFetch.nEndPos); ==trl#kQ%%
} nP|ah~
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output.close(); {wO.nOB
} 735l&(3A\
catch(IOException e){e.printStackTrace ();} B[2t.d;h
catch(Exception e){e.printStackTrace ();} 2 #cw_Ua
} G;USVF-'K
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//读取保存的下载信息(文件指针位置) ,'sDauFn
private void read_nPos() $_e{Zv[
{ K7/&~;ZwT
try{ , 10+Sh
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); UQWv)
int nCount = input.readInt(); = \K/ulZo
nStartPos = new long[nCount]; -w'g0/fD
nEndPos = new long[nCount]; G/w@2lYx
for(int i=0;i<nStartPos.length;i++) [$fB]7A
{ !~j9Oc^
nStartPos = input.readLong(); >4HB~9dKU
nEndPos = input.readLong(); ^E%NYq_2l<
} {7v|\6@e3
input.close(); vq@"y%C4
} }"q#"s
catch(IOException e){e.printStackTrace ();} %f(4jQ0I
catch(Exception e){e.printStackTrace ();} kHQn'r6
} x_l8&RIB*
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private void processErrorCode(int nErrorCode) Eok8+7g0&
{ BL%&n*&
System.err.println("Error Code : " + nErrorCode); :JXcs39
} 2Ns<lh
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//停止文件下载 DnN+W
public void siteStop() U)3?&9H
{ /N@NT/.M<
bStop = true; 472'P
for(int i=0;i<nStartPos.length;i++) TETfRnm
fileSplitterFetch.splitterStop(); P+3
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} h5^We"}+
} 475jmQ{q
//负责部分文件的抓取 "`w*-O
**FileSplitterFetch.java :rvBx"
*/ LD ,T$"
package NetFox; bnE&-N*
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import java.io.*; 26j-1c!NGd
import java.net.*; uYd_5
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public class FileSplitterFetch extends Thread { nH[>Sff$
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String sURL; //File URL *mN8Qd
long nStartPos; //File Snippet Start Position GVdJ&d\x
long nEndPos; //File Snippet End Position e"2x!(&n(
int nThreadID; //Thread's ID wJ7Fnj>u%
boolean bDownOver = false; //Downing is over 4 @9cO)m
boolean bStop = false; //Stop identical #|Je%t}~
FileAccessI fileAccessI = null; //File Access interface F+V[`w*k
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException #;'*W$Wk2
{
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this.sURL = sURL; o* QZf*M
this.nStartPos = nStart; 1rh2!4)7
this.nEndPos = nEnd; ay28%[Q b4
nThreadID = id; -"xC\R
fileAccessI = new FileAccessI(sName,nStartPos);//定位 |:d_IB@
} 9O:-q[K**
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public void run() ]Vf2Mn=]"
{ 6 x8lnXtA
while(nStartPos < nEndPos && !bStop) W1Om$S1
{ {d,^tG}
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try{ PO=A^ b
URL url = new URL(sURL); cHwN=mg]S
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Q!W+vh
httpConnection.setRequestProperty("User-Agent","NetFox"); hHsO?([99
String sProperty = "bytes="+nStartPos+"-"; 0O?!fd n
httpConnection.setRequestProperty("RANGE",sProperty); ATI2
Utility.log(sProperty); et6@);F
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InputStream input = httpConnection.getInputStream(); $60]RCu
//logResponseHead(httpConnection); XN'<H(G
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byte[] b = new byte[1024]; &4Y@-;REt
int nRead; /f,*|
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 74%Uojl"
{ .BZ3>]F3<
nStartPos += fileAccessI.write(b,0,nRead); lQer|?#
//if(nThreadID == 1) XO4r rAYvW
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); `"j _]
} " G0HsXi
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Utility.log("Thread " + nThreadID + " is over!"); %|By ?i
bDownOver = true; o!|TCwt
//nPos = fileAccessI.write (b,0,nRead); [moz{Y
} [Ma
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catch(Exception e){e.printStackTrace ();} N>+L?C
} ?rv5Z^D'
} .tRWL!
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//打印回应的头信息 '~kAsn*/
public void logResponseHead(HttpURLConnection con) ,W~a%8*
{ KdkZ-.
for(int i=1;;i++) /s^O M`5
{ !l1ycQM
String header=con.getHeaderFieldKey(i); 0%<x>O
if(header!=null) Q:!.YSB
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ih/MW_t=m=
Utility.log(header+" : "+con.getHeaderField(header)); L&SlUXyt.c
else 1t7S:IZ
break; `SO"F,
} M `bEnu
} *%xmCPJ
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public void splitterStop() `l8^n0-
{ jB!Q8#&Q
bStop = true; U.HeIJ#
} X"qC&oZmf
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} Ad:)5R o
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/* SMdQ,n1]
**FileAccess.java #(G#O1+
*//文件访问(定位,写) &jHnM^nQ
package NetFox; @4N@cM0
import java.io.*; jP9)utEm6
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public class FileAccessI implements Serializable{ FF"`F8-w>Z
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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 7#BpGQJQ
RandomAccessFile oSavedFile; ]"<
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long nPos; F(i@Gm=J]
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public FileAccessI() throws IOException /~Q2SrYH
{ )J"Lne*"
this("",0); Ol9'ZB|R
} 9_mys}+
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public FileAccessI(String sName,long nPos) throws IOException eVZ/3o
{ #Cda8)jl(
oSavedFile = new RandomAccessFile(sName,"rw"); #lM :BO
this.nPos = nPos; 6+9inWTT(
oSavedFile.seek(nPos); b=!G3wVw<
} A7!=`yA$
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public synchronized int write(byte[] b,int nStart,int nLen) ptXLWv`
{ V3'QA1$
int n = -1; AK/_^?zA s
try{ )/u?_)b4"
oSavedFile.write(b,nStart,nLen); q1Vh]d
n = nLen; S"iz
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} xe;1D'(
catch(IOException e) fD#VI
{ LB|FVNW/S
e.printStackTrace (); *5bKJgwJ
} |RBgJkS;8
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return n; LY%`O#i.
} 2G'Au} q0n
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} _h4{Sx
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/* D&f(h][hH?
**SiteInfoBean.java )E<<