/* +I?T|Iin
**SiteFileFetch.java lilKYrUmG
*/ E
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package NetFox; y ~
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import java.io.*; f;(]P
import java.net.*; I&e,R
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public class SiteFileFetch extends Thread { $^2 j#]uX
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SiteInfoBean siteInfoBean = null; //文件信息Bean A~!3svJW
long[] nStartPos; //开始位置 ;rj=hc
long[] nEndPos; //结束位置 dD2N!umW
FileSplitterFetch[] fileSplitterFetch; //子线程对象 I<I?ks
long nFileLength; //文件长度 GMZj@q
boolean bFirst = true; //是否第一次取文件 cN> z`xl
boolean bStop = false; //停止标志 ZZa$/q"
File tmpFile; //文件下载的临时信息 z.9
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DataOutputStream output; //输出到文件的输出流 Eu AJ.n
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ?`hk0q X3
public SiteFileFetch(SiteInfoBean bean) throws IOException ~?pF'3q
{ tVN#i
siteInfoBean = bean; 6'M"-9?G
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); `3$S^|v
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 'CDRb3w}B
if(tmpFile.exists ()) 4g#pQ
{ oy-Qy
bFirst = false; h<wF;g,
read_nPos(); )p MZ5|+X
} }31z
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else <mc[-To
{ MK]S205{
nStartPos = new long[bean.getNSplitter()]; }{^i*T5rl
nEndPos = new long[bean.getNSplitter()]; z/7H/~d
}
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public void run() #![i
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{ Ml)Xq-&wc
//获得文件长度 "R$ee^
//分割文件 JF >mybB
//实例FileSplitterFetch
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//启动FileSplitterFetch线程 2#nn}HEOC
//等待子线程返回 Pl=X<Bp
try{ w+cI0lj
if(bFirst) 1rV?^5
{ {PHxm
nFileLength = getFileSize(); ybtje=3E
if(nFileLength == -1) }6P]32d
{ PX](hc=
System.err.println("File Length is not known!"); _4z>I/R>Z
} K<b -|t9f
else if(nFileLength == -2) zxCxGT\;
{ nTSGcMI
System.err.println("File is not access!"); x3L3K/qMg
} $-VW)~Sl
else SvH=P!`+
{ E'LkoyI
for(int i=0;i<nStartPos.length;i++) l}X3uyS
{ t-SGG{
nStartPos = (long)(i*(nFileLength/nStartPos.length)); Rww"Z=F
} r+HJ_R,5A
for(int i=0;i<nEndPos.length-1;i++) &X^~%\F:2
{ !+cRtCaA::
nEndPos = nStartPos[i+1]; `xkJ.,#Io
} kTG}>I
nEndPos[nEndPos.length-1] = nFileLength; n<7#?X7
} M`umfw T
} `SWf)1K
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//启动子线程 K:P gkc
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; bTKzwNx
for(int i=0;i<nStartPos.length;i++) '<m[
{ 9Dd/g7
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }6eWdm!B
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), n$}c+1
nStartPos,nEndPos,i); P/t$xqAL
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); A]BD2
fileSplitterFetch.start(); f7XmVCz1
} p`{9kH1m e
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $,icKa
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [HIg\N$I8C
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", k+-u4W
nEndPos = " + nFileLength); 6R@
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// fileSplitterFetch[nPos.length-1].start(); G\TyXq_4
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//等待子线程结束 (XT^<#Ga
//int count = 0; VX&KGG.6
//是否结束while循环 +YhTb
boolean breakWhile = false; O" ['.b
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while(!bStop) p=9G)VO
{ 1h]Dc(Oc#=
write_nPos(); "xS",6Sy
Utility.sleep(500); wamqeb{u
breakWhile = true; " I`<s <
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for(int i=0;i<nStartPos.length;i++) V# w$|B\
{ o?^j1\^
if(!fileSplitterFetch.bDownOver) s<z{ (a
{ 4jis\W}%L3
breakWhile = false; if:2sS9r
break; i/oaKpPN
} EEn}Gw
} yBauK-7*c
if(breakWhile) N+!{Bt*
break; {:od=\*R
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//count++; ]Rnr>_>x;
//if(count>4) Z'WoChjM
// siteStop(); :(A]Bm3
} rN$_(%m_N
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System.err.println("文件下载结束!"); ^N`ar9Db
} tB}&-U|t[~
catch(Exception e){e.printStackTrace ();} y| @[?B
} 49_b)K.tB
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//获得文件长度 hRxR2
public long getFileSize() )"A+T&
{ C#>c(-p>RC
int nFileLength = -1; zWB>;Z}
try{ N}VKH5U|
URL url = new URL(siteInfoBean.getSSiteURL()); 3HFsR)
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); RH6qi{)i!
httpConnection.setRequestProperty("User-Agent","NetFox"); 98Pt&C? -B
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int responseCode=httpConnection.getResponseCode(); O)`R)MQ)
if(responseCode>=400) 2@:Go`mg
{ 5"^$3&)
processErrorCode(responseCode); 6/.-V1*O
return -2; //-2 represent access is error ?$pp%
} Bz9!a k~4
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String sHeader; Z!~~6Sq
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for(int i=1;;i++) >UZfi u
{ m}Kn!21
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 5RI"gf
//Utility.log(in.readLine()); !95ZK.UT
sHeader=httpConnection.getHeaderFieldKey(i); 5R/k -h^`
if(sHeader!=null) ~WehG<p v[
{ vkASp&a
if(sHeader.equals("Content-Length")) !m'lOz
{ 9'\18_w
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); : )cPc7$8
break; [$;6LFs}
} pDCQ?VW
} <i%.bfQ/-
else +Q}Y ?([
break; mcpM<vY/H
} c3Y\XzV3v
} 68+9^
catch(IOException e){e.printStackTrace ();} HKb8z@;%@
catch(Exception e){e.printStackTrace ();} ^6Hfq^ejt
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Utility.log(nFileLength); LylB3BM
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return nFileLength; hcWkAR
} 37 T<LU
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//保存下载信息(文件指针位置) }tua0{N:z
private void write_nPos()
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{ 1ePZs$
try{ l~!\<, !
output = new DataOutputStream(new FileOutputStream(tmpFile)); liA)|.H
output.writeInt(nStartPos.length); SQ1.jcWW[
for(int i=0;i<nStartPos.length;i++) JC_Y#kN@z
{ tTLD6#
// output.writeLong(nPos); ;Bat!K7W
output.writeLong(fileSplitterFetch.nStartPos); C*,-lk0b@
output.writeLong(fileSplitterFetch.nEndPos); [C,<Q
} K;sH0*
output.close(); cuB~A8H#}
} w\:-lX w
catch(IOException e){e.printStackTrace ();} :0Rd )*k,v
catch(Exception e){e.printStackTrace ();} B=jJ+R
} 0;#%KC,
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//读取保存的下载信息(文件指针位置) i"_)91RA
private void read_nPos() %r=uS.+hrF
{ |Z0?
try{ J3Qv|w[3Y
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Yo/U /dB
int nCount = input.readInt(); X2}\i5{
nStartPos = new long[nCount]; E*:!G
nEndPos = new long[nCount]; 1j`-lD
for(int i=0;i<nStartPos.length;i++) M$B9?N6
{ _*>bf G
nStartPos = input.readLong(); +\fr3@Yc
nEndPos = input.readLong(); E5~HH($b
} t>)iC)^u
input.close(); C\ZL*,%}
} Vl%AN;o
catch(IOException e){e.printStackTrace ();} m.iCGX
catch(Exception e){e.printStackTrace ();} rr>QG<i;G
} o8-BTq8
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private void processErrorCode(int nErrorCode) j&6,%s-M`a
{ GvF8S MO[x
System.err.println("Error Code : " + nErrorCode); '_lyoVP
} zH0%;
o}
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//停止文件下载 W2D^%;mw
public void siteStop() /`Yy(?,
{ 5Q#;4
bStop = true; w},' 1
for(int i=0;i<nStartPos.length;i++) DJ_,1F
fileSplitterFetch.splitterStop(); #=V%S
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} MUhC6s\F
} m4bfW
//负责部分文件的抓取 h$F;=YS
**FileSplitterFetch.java o@>{kzCx
*/ / *RDy!m
package NetFox; 7g[m,48{
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import java.io.*; #s$b\"4
import java.net.*; q#:,6HDd
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public class FileSplitterFetch extends Thread { G~1#kg
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String sURL; //File URL &$?e D{
long nStartPos; //File Snippet Start Position
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long nEndPos; //File Snippet End Position >J_{mU
int nThreadID; //Thread's ID O#
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boolean bDownOver = false; //Downing is over '%_1eaH
boolean bStop = false; //Stop identical Q/m))!ikMt
FileAccessI fileAccessI = null; //File Access interface 7}OzTup
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException IT!
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{ &I
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this.sURL = sURL; 1 mhX3
this.nStartPos = nStart; t
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this.nEndPos = nEnd; :@jhe8'w
nThreadID = id; SweaERl
fileAccessI = new FileAccessI(sName,nStartPos);//定位 LTj;e[
} L+LxS|S+M
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public void run() pJrc\`D
{ z~Ph=1O>p
while(nStartPos < nEndPos && !bStop) X0O0Y>"
{ X|K"p(N
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try{ no- Lx-x
URL url = new URL(sURL); ,mEFp_a+
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %;yDiQ !+
httpConnection.setRequestProperty("User-Agent","NetFox"); 34-QgE
String sProperty = "bytes="+nStartPos+"-"; >8_#L2@
httpConnection.setRequestProperty("RANGE",sProperty); lTJ1]7)
Utility.log(sProperty); o90SXa&l/
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InputStream input = httpConnection.getInputStream(); xoF]r$sC8
//logResponseHead(httpConnection); -fw0bL%0
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byte[] b = new byte[1024]; }M'h5x
int nRead; q$z#+2u
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) #gq4%;
{ RBIf6oxdE
nStartPos += fileAccessI.write(b,0,nRead); #u~s,F$De
//if(nThreadID == 1) [/hS5TG|7
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (mz5vzyw
} >8Wvz.Nq/
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Utility.log("Thread " + nThreadID + " is over!"); I'2:>44>I6
bDownOver = true; =A={Dpv[>
//nPos = fileAccessI.write (b,0,nRead); )k01K,%#)
} XIh2Y\33ys
catch(Exception e){e.printStackTrace ();} vn|u&}h
} OLUQjvnU
} tRRPNY
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//打印回应的头信息 %^[45e
public void logResponseHead(HttpURLConnection con) QLH&WF
{ }1]/dCv
for(int i=1;;i++) :bI4HXT3
{ }3:DJ(Y
String header=con.getHeaderFieldKey(i); *#1&IJPI
if(header!=null) >Z?fX
//responseHeaders.put(header,httpConnection.getHeaderField(header)); r?Jxl<
Utility.log(header+" : "+con.getHeaderField(header)); kCfSF%W&
else qH!}oPeU'
break; ;ZXP*M9
} tW 53&q\=
} `l@[8H%aw
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public void splitterStop() gS4zX>rqe
{ A`<#}~A
bStop = true; .o91^jt
} mbxJS_P
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} @?iLz7SPk
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/* \kcJF'JFA0
**FileAccess.java z_R^n#A~r
*//文件访问(定位,写) JL $6Fw;
package NetFox; i3t=4[~oL
import java.io.*; ozH7c_ <
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public class FileAccessI implements Serializable{ vF"<r,pg
gP8Fe =]
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 0fA42*s;
RandomAccessFile oSavedFile; JPfNf3<@My
long nPos; :J]S+tQ)
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public FileAccessI() throws IOException *%1:="W*|
{ DfwxPt#
this("",0); 16/+ O$#y
} <_@ K4zV
6}
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public FileAccessI(String sName,long nPos) throws IOException 0i\ol9,bf
{ "Pi\I9M3
oSavedFile = new RandomAccessFile(sName,"rw"); bcL>S$B
this.nPos = nPos; rt$zM
oSavedFile.seek(nPos); pq_DYG]
} ~K% ]9
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public synchronized int write(byte[] b,int nStart,int nLen) P`6
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{ 75i
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int n = -1; i@e.Uzn
try{ xb\(>7M6Y
oSavedFile.write(b,nStart,nLen); =o;QvOS;
n = nLen; ^-{ 1]G:
} hPr*<2mp
catch(IOException e) zrk/}b0j
{ ^4(CO[|c~
e.printStackTrace (); 6i[\?7O'0
} QT{$2 7;
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return n; A[J9v{bD
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} C>7Mx{ !H
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/* jENarB^As
**SiteInfoBean.java xP*9UXZ4P
*/ wpu]{~Y
package NetFox; 2!>phE
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public class SiteInfoBean { {YZ)IaqZ
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private String sSiteURL; //Site's URL VOwt2&mZ
private String sFilePath; //Saved File's Path ?2[=llS4
private String sFileName; //Saved File's Name fOiLb.BW
private int nSplitter; //Count of Splited Downloading File k/AcXU%O+
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public SiteInfoBean() Na: M1Uhb
{//nSplitter的缺省值为5 -cyJjLL*
//default value of nSplitter is 5 A>+5~u
this("","","",5); T[xGF/
} RK(uC-l
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) dgd&ymRm
:
{ {l{p
sSiteURL= sURL; ?I}jsm1)
sFilePath = sPath; +P|$T:b
sFileName = sName; JfKhYRl
this.nSplitter = nSpiltter; z/ T|
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} *{W5QEa
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public String getSSiteURL() @
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{ ;nLQ?eS\
return sSiteURL; ]]o7ej
} i051qpj
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public void setSSiteURL(String value) ;1S{xd*^N
{ ]w%7/N0R
sSiteURL = value; c}Jy'F7&f
} V)R-w`
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public String getSFilePath() ,8o]XFOr
{ R8EDJ2u#
return sFilePath; gv `jeN
} GEA@AD=^f
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public void setSFilePath(String value) `@ qSDW!b
{ )ty
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sFilePath = value; +<:p`%
} gb@Rx
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public String getSFileName() ( NjX?^
{ {ZbeF#*"
return sFileName; ~FZLA}
} St|sUtj<r
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public void setSFileName(String value) -iBu:WyY$
{ mwbkXy;8
sFileName = value; .^@+$}
} WSDNTfpI
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