/* ;y-JR$M
**SiteFileFetch.java Nd( I RsH(
*/ o+x%q<e;c
package NetFox; B6F!"
import java.io.*; l'l&Zqd
import java.net.*; 46vC/
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public class SiteFileFetch extends Thread { v^eAQoFLhN
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SiteInfoBean siteInfoBean = null; //文件信息Bean 6`2i'flv
long[] nStartPos; //开始位置 JX'}+.\
long[] nEndPos; //结束位置 uyEk1)HC
FileSplitterFetch[] fileSplitterFetch; //子线程对象 Q7u|^Gu,5
long nFileLength; //文件长度 nOyG7:
boolean bFirst = true; //是否第一次取文件 O$z"`'&j#
boolean bStop = false; //停止标志 \X
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File tmpFile; //文件下载的临时信息 ;ZB=@@l(
DataOutputStream output; //输出到文件的输出流 48,*sTRq
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) fKEDe>B5
public SiteFileFetch(SiteInfoBean bean) throws IOException +m
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{ JRBz/ j
siteInfoBean = bean; vgc~%k62c
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); X,3"4 SK
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Jb{g{a/
if(tmpFile.exists ()) mqeW,89
{ '[6]W)f
bFirst = false; %o9mG<.T
read_nPos(); e }O&_j-
} YQ+8lANC
else HpbwW=;V
{ b w1s?_P
nStartPos = new long[bean.getNSplitter()]; 4+qo=i
nEndPos = new long[bean.getNSplitter()]; G>^= Bm_$
} R)d_0Ng
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} YeJTB}
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public void run()
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{ 0<A*I{,4L
//获得文件长度 k'.cl^6Z8
//分割文件 j}lne^ h
//实例FileSplitterFetch + d>2 '
//启动FileSplitterFetch线程 x15&U\U
//等待子线程返回 aIT0t0.
try{ T#E,^|WEk
if(bFirst) Z>`frL
{ 0(5qVJ12
nFileLength = getFileSize(); PtPx(R3
if(nFileLength == -1) K\}qYdPF
{ (CDh,ZN;|
System.err.println("File Length is not known!"); iMM9a;G+
} r
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else if(nFileLength == -2) rf/]VAK
{ 1.2qh"#
System.err.println("File is not access!"); (CAVOed
} "@+Z1k-8U
else =J-&usX
{ SP=8v0
for(int i=0;i<nStartPos.length;i++) abe5 As r
{ }lkU3Pf1U
nStartPos = (long)(i*(nFileLength/nStartPos.length)); f#38QP-T
} c[6<UkH7
for(int i=0;i<nEndPos.length-1;i++) 9nd,8Nji
{ !y1qd
nEndPos = nStartPos[i+1]; 6[Mu3.T
} BMzS3;1_
nEndPos[nEndPos.length-1] = nFileLength; |Ntretz`\
} 9D5v0Qi
} fob.?ID-;
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//启动子线程 IjPtJwW`A
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ;k1VY
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for(int i=0;i<nStartPos.length;i++) V[*<^%
{ i:R_g]
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #FGj)pu
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), sVS),9\}
nStartPos,nEndPos,i); E_xCRfw_i]
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); zM%2h:*+{
fileSplitterFetch.start(); GQ9H>Ssz
} }1Hy[4B(k\
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), I&&[ ':
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ,Igd<A=
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", *kGk.a=
nEndPos = " + nFileLength); p ^I#9(PT
// fileSplitterFetch[nPos.length-1].start(); (ap,3$hS
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//等待子线程结束 }(UU~V
//int count = 0; ibuoq X`
//是否结束while循环 H3|x
boolean breakWhile = false; V(!-xu1,
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while(!bStop) ftqeiZ
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{ JW=P}h
write_nPos(); JN<u4\e{-&
Utility.sleep(500); ^1+=HdN,
breakWhile = true; x)2ZbIDB:"
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for(int i=0;i<nStartPos.length;i++) ARJ} h
{ RATW[(ZA
if(!fileSplitterFetch.bDownOver) Z'\{hL S
{ II}3w#r4
breakWhile = false; w;DRC5V>
break; tq8rG@-C
} ;fKFmY41
} ,=t}|!jx
if(breakWhile) gY!#=?/S
break; !Im{-t
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//count++; {w VJv1*l
//if(count>4) ^yVKW5x
// siteStop(); $n9Bp'<
} Z/[ww8b.
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System.err.println("文件下载结束!"); }>~]q)]
} ^q)s
catch(Exception e){e.printStackTrace ();} ^@n?&
} &0%x6vea
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//获得文件长度 =S}SZYwl
public long getFileSize() uO}UvMW
{ H.]rH,8
int nFileLength = -1; G[z4 $0f
try{ QwgP+ M+
URL url = new URL(siteInfoBean.getSSiteURL()); 2<8JY4]!]
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3=xN)j#B
httpConnection.setRequestProperty("User-Agent","NetFox"); t7qY!S (
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int responseCode=httpConnection.getResponseCode(); =^S1+B
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if(responseCode>=400) iF'qaqHWY4
{ $@Kwsoh'
processErrorCode(responseCode); "YePd*W
return -2; //-2 represent access is error UbSAyf
} eg
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String sHeader; l#k&&rI5x.
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for(int i=1;;i++) AI\|8[kf0
{ @eU5b63jM
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); TW5Pt{X=f
//Utility.log(in.readLine()); ?kKr/f4N
sHeader=httpConnection.getHeaderFieldKey(i); ym.:I@b?6
if(sHeader!=null) Q%
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{ p`2w\P3;)
if(sHeader.equals("Content-Length")) $~FnBD%|{
{ =9y&j-F
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); vo JmNH
break; n/jZi54gO
} 5T- N\)@
} c6_i~0W56
else 2{fPQQ;#
break; T?Y/0znB*
} .`Rju|l
} T.x"a$AU
catch(IOException e){e.printStackTrace ();} ?'I pR
catch(Exception e){e.printStackTrace ();} N!iugGL
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Utility.log(nFileLength); 9E-]S'Z
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return nFileLength; AIX?840V
} pRrokYM
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//保存下载信息(文件指针位置) E\lel4ai
private void write_nPos() w:+wx/\
{ 5w#7B
try{ 6h%_\I.Z[[
output = new DataOutputStream(new FileOutputStream(tmpFile)); K! I]0!:
output.writeInt(nStartPos.length); #9FY;~
for(int i=0;i<nStartPos.length;i++) g;To}0H
{ ZtPnHs.x
// output.writeLong(nPos); |];f?1
output.writeLong(fileSplitterFetch.nStartPos); Vnvfu!>(
output.writeLong(fileSplitterFetch.nEndPos); : 7Jpt3
} LCouDk(=`
output.close(); ll8Zo+-[
} ~H1ZQ[
catch(IOException e){e.printStackTrace ();} K 0Gm ?(
catch(Exception e){e.printStackTrace ();} ~us1Df0bp
} i}E&mv'
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//读取保存的下载信息(文件指针位置) |(77ao3
private void read_nPos() {Ne5*HFV
{ Z0#&D&2sV
try{ FBGe s[,
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Pg\!\5
int nCount = input.readInt(); UZJ<|[
nStartPos = new long[nCount]; jhF&
nEndPos = new long[nCount]; %(YU*Tf~
for(int i=0;i<nStartPos.length;i++) wJMk%N~R:
{ Um2RLM%
nStartPos = input.readLong(); XS oHh-
nEndPos = input.readLong(); /*kc|V
} V''?kVJ
input.close(); U *K6FWqiB
} qayM0i>>
catch(IOException e){e.printStackTrace ();} J_`a}ox
catch(Exception e){e.printStackTrace ();} u/ZV35z
} >O$JS,
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private void processErrorCode(int nErrorCode) rm?C_
{ ?(R!BB
System.err.println("Error Code : " + nErrorCode); )1, U~+JFU
} H9%[!
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//停止文件下载 57(5+Zme
public void siteStop() dKJ-{LV
{ p>9|JMk
bStop = true; [!ilcHE)
for(int i=0;i<nStartPos.length;i++) h-+vNhH
fileSplitterFetch.splitterStop(); Ou7nk:I@
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} U
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} FFq8LM8
//负责部分文件的抓取 SbXV'&M2AT
**FileSplitterFetch.java 9 .18E(-
*/ & N.]8x5A
package NetFox;
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import java.io.*; \N[2-;[3
import java.net.*; l8 H8c &
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public class FileSplitterFetch extends Thread { ":!1gC
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String sURL; //File URL J;*2[o.N
long nStartPos; //File Snippet Start Position Mb:>
long nEndPos; //File Snippet End Position jp880}
int nThreadID; //Thread's ID Rrw6\iO
boolean bDownOver = false; //Downing is over J b?x-%Za
boolean bStop = false; //Stop identical &t,"k'p
FileAccessI fileAccessI = null; //File Access interface b ,e"x48q
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ;Iax \rQ
{ .2V?G]u
this.sURL = sURL; ?
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this.nStartPos = nStart; ok1-`c P
this.nEndPos = nEnd; oS^g "hQ`\
nThreadID = id; GJIZu&C
fileAccessI = new FileAccessI(sName,nStartPos);//定位 q+ 2v9K@
} BG_6$9y
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public void run() kgP6'`}E[
{ U8OVn(qV
while(nStartPos < nEndPos && !bStop) $CDRIn50
{ _[h!r;DsG
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try{ /HVxZ2bar
URL url = new URL(sURL); dlH&8
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); N{H#j6QW
httpConnection.setRequestProperty("User-Agent","NetFox"); #_Z)2ESX
String sProperty = "bytes="+nStartPos+"-"; 8Om4G]*|,
httpConnection.setRequestProperty("RANGE",sProperty); XwIhD
Utility.log(sProperty);
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InputStream input = httpConnection.getInputStream(); \3T[Cy|5|
//logResponseHead(httpConnection); d>O/Zal
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byte[] b = new byte[1024]; pfQ3Y$z
int nRead; YBL.R;^v
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) w1LZ\nA<
{ g>QN9v})
nStartPos += fileAccessI.write(b,0,nRead); ',!>9Dj
//if(nThreadID == 1) r0s(MyI
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {hoe^07XK
} 4+:'$Nw
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Utility.log("Thread " + nThreadID + " is over!"); 3LZvlcLb
bDownOver = true; mhI
//nPos = fileAccessI.write (b,0,nRead); {7Hc00FM
} 7c83g2|%
catch(Exception e){e.printStackTrace ();} d%:J-UtG"
} eq@-J+
} `SQobH
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//打印回应的头信息 O-ppR7edh
public void logResponseHead(HttpURLConnection con) oG\lejO
{ <B!DwMk;.
for(int i=1;;i++) NH4T*R)Vz
{ U6#9W}CE
String header=con.getHeaderFieldKey(i); %WPyc%I
if(header!=null) ;Kh?iqn^
//responseHeaders.put(header,httpConnection.getHeaderField(header)); qfqL"G
Utility.log(header+" : "+con.getHeaderField(header)); 8x-(7[#e<g
else j!"5,~
break; ~9#'s'
} q4g)/x%nc
} K%UjPzPWw
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public void splitterStop() Q]<6voyy
{ @U:PXCvh
bStop = true; |CAMdU
} !Y 9V1oVf"
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} K5F;/KR"
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/* H.[nr:
**FileAccess.java %<`sDO6Q?
*//文件访问(定位,写) >J#/IjCW
package NetFox; P 1
import java.io.*; ^91Ae!)d
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public class FileAccessI implements Serializable{ HX ,\a`
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 iNilk!d6Q3
RandomAccessFile oSavedFile; ;]k\F
long nPos; (gIFuOGi>
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public FileAccessI() throws IOException '(-H#D.oy'
{ ez~u A4
this("",0); IaKJ W?
} s1t kiX{>
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public FileAccessI(String sName,long nPos) throws IOException 5s@xpWVot
{ sRZ?Ilua6
oSavedFile = new RandomAccessFile(sName,"rw"); 5n1`$T.WG
this.nPos = nPos; ={51fr/C%
oSavedFile.seek(nPos); 6 X'#F,M
} "{kE#`c6<n
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public synchronized int write(byte[] b,int nStart,int nLen) ]x(6^:D5
{ Dl,sl>{
int n = -1; Sjo-Xf}
try{ Ibx\k
oSavedFile.write(b,nStart,nLen); S(/^_Y
n = nLen;
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} a^_W}gzzd
catch(IOException e) wc-v]$DW
{ Ai)>ot
e.printStackTrace (); (EjlnG}5l
} Z?'?|vM
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return n; Nw(hN+_u
} Qg0%rbE
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} 2vhP'?;K
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/* H[}lzL)
**SiteInfoBean.java ouO9%)zv
*/ &PMfAo^
package NetFox; 0/1=2E^,
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public class SiteInfoBean { f>e0l'\
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private String sSiteURL; //Site's URL a8-V`
private String sFilePath; //Saved File's Path O*Y ? :
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private String sFileName; //Saved File's Name ].2t7{64
private int nSplitter; //Count of Splited Downloading File :4\%a4{Ie
";7/8(LBZ
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public SiteInfoBean() (F9e.QyWb
{//nSplitter的缺省值为5 D!ASO]
//default value of nSplitter is 5 BoOuN94
this("","","",5); u~>G8y)k9O
} gXU(0(Gq
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) y#8 W1%{x
{ i`W~-J
sSiteURL= sURL; QcJC:sP\>
sFilePath = sPath; mU"Am0Bdjq
sFileName = sName; Y[_|sIy*
this.nSplitter = nSpiltter; 'X6Z:dZY
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} 2-jXj9kp`
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public String getSSiteURL() bC98<if
{ =qpGAv_#
return sSiteURL; k+*pg4'
} f=VlO d
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public void setSSiteURL(String value) iX<" \pV
{ wwQ2\2w>Hm
sSiteURL = value; H=w):kL|
} vVIND
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public String getSFilePath() (:O6sTx-hE
{ <&g