/* X/BcS[a
**SiteFileFetch.java AW<"3 !@
*/ sS{!z@\Lf
package NetFox; M 8NWQ^Y
import java.io.*; 4.e0k<]N`
import java.net.*; %y|L'C,ge"
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public class SiteFileFetch extends Thread { r
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SiteInfoBean siteInfoBean = null; //文件信息Bean 5<$8.a#
long[] nStartPos; //开始位置 J?%e cCN
long[] nEndPos; //结束位置 3j7Na#<tL3
FileSplitterFetch[] fileSplitterFetch; //子线程对象 @#QaaR;4
long nFileLength; //文件长度 `e[>S
boolean bFirst = true; //是否第一次取文件 <Toy8-kj
boolean bStop = false; //停止标志 6>NK2} `
File tmpFile; //文件下载的临时信息 ){I!orQ
DataOutputStream output; //输出到文件的输出流 q@&6&cd
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) {2.zzev'
public SiteFileFetch(SiteInfoBean bean) throws IOException OK" fFv
{ ?1.WF}X'
siteInfoBean = bean; 7CwQmVe+
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Ib(G!oO:E-
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); (.pi ,+Ws
if(tmpFile.exists ()) n@$("p
{ 6PyW(i(bs
bFirst = false; N;` jz(r
read_nPos(); U
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} S;^'Ek"Z.
else @%"r69\
{ LsxRK5
nStartPos = new long[bean.getNSplitter()]; BZOB\Ym
nEndPos = new long[bean.getNSplitter()]; lx{ '
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} 3|Y2BAd
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} pEp$J;
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public void run() G{74o8
{ .
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//获得文件长度 |,Kk#`lW<f
//分割文件 :MihVL F
//实例FileSplitterFetch ~%L=<TBAc
//启动FileSplitterFetch线程 tx7B?/5D
//等待子线程返回 {BY(zsl
try{ %n^ugm0B
if(bFirst) : G'a"%x
{ LeV";=_n
nFileLength = getFileSize(); <Rfx`mn
if(nFileLength == -1) k&9[}a*
{ Bn{i+8I
System.err.println("File Length is not known!"); wx8Qz,Z
} Q9Vj8JO"{
else if(nFileLength == -2) 4Opf[3]
{ 4I8QM&7
System.err.println("File is not access!"); /'a\$G"%6
} w0X})&,{`m
else cD t|v~
{ 12@Ge]
for(int i=0;i<nStartPos.length;i++) ~gdnD4[G
{ ?c<uN~fC=
nStartPos = (long)(i*(nFileLength/nStartPos.length)); SUDvKP
} WP{U9YF2
for(int i=0;i<nEndPos.length-1;i++) 9aBz%* xo
{ w>e+UW25Y
nEndPos = nStartPos[i+1]; NG8F'=<
} L{0\M`B-
nEndPos[nEndPos.length-1] = nFileLength; {>Hn:jW<.
} MZ?+I~@
} TVF:z_M9
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//启动子线程 }wZsM[NDB
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; :JU$6
for(int i=0;i<nStartPos.length;i++) ;+1ooeU
{ d&lT/S
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), S$=caZ?
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), -/:!AxIH
nStartPos,nEndPos,i); NiYT%K%
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 5<M$ XT
fileSplitterFetch.start(); \dbaY: (
} pVM1%n:#
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7 lSR
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); N/eus"O;
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", " {X0&
nEndPos = " + nFileLength); \D1@UyE
// fileSplitterFetch[nPos.length-1].start(); `!xI!Y\
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//等待子线程结束 .kTOG'K\e
//int count = 0; ;ojJXH~$}
//是否结束while循环 g'td(i[
boolean breakWhile = false; A2!pbeG
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while(!bStop) i91k0q*di
{ TR%8O;
write_nPos(); yg6o#;
Utility.sleep(500); wq|7sk{
breakWhile = true; Nza@6nI"
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for(int i=0;i<nStartPos.length;i++) 6n|][! f
{ 4+89 M
if(!fileSplitterFetch.bDownOver) [_`@V4
{ k;K-6<^h
breakWhile = false; 0+k..l
break; C~WWuju'
} A-, hm=?
} 6E2#VT>@/
if(breakWhile) |h\A5_0_
break; _4T7Vg''
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//count++; #ro$$I;
//if(count>4) 4];>O
// siteStop(); lavy?tFer
} $1FnjL5u
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System.err.println("文件下载结束!"); b`JS&E
} v4K! BW
catch(Exception e){e.printStackTrace ();} do9~#F
} "Th;YJu
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//获得文件长度 `(DHa=s1
public long getFileSize() mM~&mAa+Z
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int nFileLength = -1; U5OFw+J
try{ #M<YNuE#"
URL url = new URL(siteInfoBean.getSSiteURL()); M& )yr^
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); i(ZzE
httpConnection.setRequestProperty("User-Agent","NetFox"); HCx0'|J
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int responseCode=httpConnection.getResponseCode(); 4l>U13~#
if(responseCode>=400) Z|fi$2k0!
{ 4TyzD%pOw
processErrorCode(responseCode); AAqfp/DC
return -2; //-2 represent access is error B%`|W@v
} FLZ9Rg
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String sHeader; 76]Z~^Y
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for(int i=1;;i++) $Ld-lQsL
{ 2
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); hL&7D@
//Utility.log(in.readLine()); Vk*XiEfKm>
sHeader=httpConnection.getHeaderFieldKey(i); s>1\bio*I
if(sHeader!=null) :S}ZF$
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{ C,%Dp0
if(sHeader.equals("Content-Length")) zqURnsJ
{ ).0p\.W~
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); K7C!ZXw~
break; j&U7xv
} Vk2%yw>
} @4KKm@(p85
else w
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break; -x:7K\=$SX
} ,%qP
} !T2{xmHKv$
catch(IOException e){e.printStackTrace ();} $5\!ws<cZ
catch(Exception e){e.printStackTrace ();} {=,G>p
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Utility.log(nFileLength); yMzy!b Ky
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return nFileLength; C~?p85
} (D6ks5Uui
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//保存下载信息(文件指针位置) wkx #WC
private void write_nPos() $at\aJ
{ +t&+f7
try{ Z[l+{
output = new DataOutputStream(new FileOutputStream(tmpFile)); bKsEXS
output.writeInt(nStartPos.length); `Y+R9bd
for(int i=0;i<nStartPos.length;i++) 9Y2.ob!$}
{ D=Nt0y
// output.writeLong(nPos); oB>#P-V
output.writeLong(fileSplitterFetch.nStartPos); /x]^Cqe
output.writeLong(fileSplitterFetch.nEndPos); LN5BU,4=
} hN*v|LFf1
output.close(); $=#Lf[|f=
} m- a':
catch(IOException e){e.printStackTrace ();} '4D7:
catch(Exception e){e.printStackTrace ();} *3OlWnZ?
} Bn%?{z)
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//读取保存的下载信息(文件指针位置) J_j4Zb% K
private void read_nPos() >e(@!\ x
{ O_GHvLO=
try{ >wL!`:c'"
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); "=KFag
int nCount = input.readInt(); MRZN4<}9
nStartPos = new long[nCount]; ZsCwNZR
nEndPos = new long[nCount]; Nf2lw]-G4
for(int i=0;i<nStartPos.length;i++) 7xY&7 x(v
{ :7X{s4AU6
nStartPos = input.readLong(); Vq/hk
nEndPos = input.readLong(); 1|s`z
} +fKV/tSWi
input.close(); ;8
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} %rf6>
catch(IOException e){e.printStackTrace ();} __1Hx?f
catch(Exception e){e.printStackTrace ();} XMykUr e|
} ~|"uuA1/#O
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private void processErrorCode(int nErrorCode) ydRS\l
{ :8hX kQ
System.err.println("Error Code : " + nErrorCode); &j/,8 Z*
}
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//停止文件下载 Os].
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public void siteStop() :oYSvK7>
{ 3q@H8%jcw
bStop = true; ]/3!t=La
for(int i=0;i<nStartPos.length;i++) s jaaZx1
fileSplitterFetch.splitterStop(); <lU(9)
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} 8Fbt >-N<\
} S$P=;#r
//负责部分文件的抓取 ;9-J=@KY4
**FileSplitterFetch.java 0,):;OI
*/ jq_4x[
package NetFox; jeO`45O
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import java.io.*; ,J<+Wxz
import java.net.*; w@YPG{"j
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public class FileSplitterFetch extends Thread { aI}htb{m`
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String sURL; //File URL "(~fl<;
long nStartPos; //File Snippet Start Position OwgPgrV
long nEndPos; //File Snippet End Position D vN0h(?
int nThreadID; //Thread's ID paYS<8In
boolean bDownOver = false; //Downing is over G9#3
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boolean bStop = false; //Stop identical _5p]Arg?}&
FileAccessI fileAccessI = null; //File Access interface E@l@f
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException jROh3kq
{ X4Uy3 TV>
this.sURL = sURL; _{}^]ZB
this.nStartPos = nStart; [Z;H=`
this.nEndPos = nEnd; jaVx9FR+
nThreadID = id; U[q3 9FR
fileAccessI = new FileAccessI(sName,nStartPos);//定位 1N{ >00
} h+cOOm-)
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public void run() ^)$T`
{ 7s{['t
while(nStartPos < nEndPos && !bStop) )7AjRtb!/
{ _W,?_"[R=
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try{ xk,1D
URL url = new URL(sURL); RUut7[r
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); bGwj` lue
httpConnection.setRequestProperty("User-Agent","NetFox"); B4c;/W-
String sProperty = "bytes="+nStartPos+"-"; 5nmE*(
httpConnection.setRequestProperty("RANGE",sProperty); f{\[+>
Utility.log(sProperty); 8{7'w|/;.{
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InputStream input = httpConnection.getInputStream(); N
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//logResponseHead(httpConnection); N[DKA1Ei
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byte[] b = new byte[1024]; `d
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int nRead; qjf4G[]!
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) O -p^S
{ V4W(>g
nStartPos += fileAccessI.write(b,0,nRead); WS1Y maV
//if(nThreadID == 1) V.yDZ"
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); uMZ<i}
} qA25P<