/* 1g+<`1=KT
**SiteFileFetch.java dQb?Zi7g
*/
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package NetFox; kzu=-@s
import java.io.*; )2S\:&x
import java.net.*; DQ$/0bq
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public class SiteFileFetch extends Thread { D?R z|
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SiteInfoBean siteInfoBean = null; //文件信息Bean tK*f8X+q
long[] nStartPos; //开始位置 ^=j$~*(LmX
long[] nEndPos; //结束位置 lVHJ}(<'p
FileSplitterFetch[] fileSplitterFetch; //子线程对象 WP9=@X Z
long nFileLength; //文件长度 z7o59&
boolean bFirst = true; //是否第一次取文件 o-_a0j
boolean bStop = false; //停止标志
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File tmpFile; //文件下载的临时信息 Z)~2{)
DataOutputStream output; //输出到文件的输出流 _JS'~JO3{
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) $}@ll^
public SiteFileFetch(SiteInfoBean bean) throws IOException B=7L+6
{ WD:5C3;
siteInfoBean = bean; 9 )qx0
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 6gXc-}dp
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); e9hQJ
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if(tmpFile.exists ()) s#ykD{Z
{ *0@e_h
bFirst = false; /VQ<}S[k}-
read_nPos(); x,+zw9
} [@czvPi
else AyUVsIuPT=
{ vjb{h'v
nStartPos = new long[bean.getNSplitter()]; B4C`3@a
nEndPos = new long[bean.getNSplitter()]; $Fj7'@1(
} dj#<,e\
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} Qa=;Elp:[
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public void run() s$;v )w$
{ UZ$p wjC
//获得文件长度 ;%}
//分割文件 J{Jxb1:c
//实例FileSplitterFetch 4{TUoI6ii
//启动FileSplitterFetch线程 4{V=X3,x
//等待子线程返回 <Ip}uy[Y
try{ j,Y=GjfGM
if(bFirst) W$W7U|Z9y+
{ chy7hPxC;
nFileLength = getFileSize(); )u$A!+fo
if(nFileLength == -1) btOC\bUMfD
{ N^)OlH
System.err.println("File Length is not known!"); ZHT.+X:_
} &^Io\
else if(nFileLength == -2) H5n"!!
{ Q["}U7j
System.err.println("File is not access!"); pVr,WTr6E
} fqi584
else {,m!%FDL
{ L_(|5#IDw
for(int i=0;i<nStartPos.length;i++) J<2N~$
{ ]du pU"VV
nStartPos = (long)(i*(nFileLength/nStartPos.length)); "-9YvB#
} ^>>Naid
for(int i=0;i<nEndPos.length-1;i++) ?Gb
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{ li'#< "R?'
nEndPos = nStartPos[i+1]; Z1&8U=pax
} \6o
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nEndPos[nEndPos.length-1] = nFileLength;
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} 8p5u1 ;2
} <B)lV'!Bd
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//启动子线程 \(Iy>L.
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; a}yJ$6xi
for(int i=0;i<nStartPos.length;i++) {x+jFj.
{ )gE:@3
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), qVf~\H@
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), rl4-nA
nStartPos,nEndPos,i); }Vt5].TA
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {YkW5zC(L
fileSplitterFetch.start(); wi!Ml4Sb
} pl%ag~i5
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), W6Hiqu+
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); (t <Um
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// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 8u>E(Vmpu
nEndPos = " + nFileLength); nD!^0?
// fileSplitterFetch[nPos.length-1].start(); ZEB1()GB
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//等待子线程结束
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//int count = 0; T =:^k+
//是否结束while循环 E|No$QO)
boolean breakWhile = false; ]_-<[0
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while(!bStop) kWWb<WRW:
{ hI"I#(*jA%
write_nPos(); s3q65%D
Utility.sleep(500); _:{XL c
breakWhile = true;
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for(int i=0;i<nStartPos.length;i++) &AW?!rH
{ `jP6;i
if(!fileSplitterFetch.bDownOver) X/?3ifP6I
{ L./UgeZ
breakWhile = false; Qq5)|m
break; ^K3{6}]
} Q?vGg{>
} *'Ch(c:rtH
if(breakWhile) (HY|0Bgr
break; x;ujR<
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//count++; 2Ddrxc>48
//if(count>4) J6jrtLh
// siteStop(); X_XqT
} #bnFR
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System.err.println("文件下载结束!"); 2+0'vIw}
} zp d4uto5
catch(Exception e){e.printStackTrace ();} A\WgtM
} gCd9"n-e
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//获得文件长度 N~SG=\rP;o
public long getFileSize() # *\PU
{ r3#H]c
int nFileLength = -1; VaH#~!
try{ UeE&rA]
URL url = new URL(siteInfoBean.getSSiteURL()); `6UW?1_Z5
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 9hcZbM]
httpConnection.setRequestProperty("User-Agent","NetFox"); \s[Uq
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int responseCode=httpConnection.getResponseCode(); *2@Ne[dYEF
if(responseCode>=400) <UeO+M(
{ 7)~/`w)P
processErrorCode(responseCode); /z6NJ2jb
return -2; //-2 represent access is error ]e
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} Aj-}G^>#
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String sHeader; WnA]gyc
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for(int i=1;;i++) aiea&aJ
{ zf#V89!]C"
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); !DD|dVA{
//Utility.log(in.readLine()); )t0t*xu#
sHeader=httpConnection.getHeaderFieldKey(i); jRzR`>5
if(sHeader!=null) eo"6 \3z
{ l1a=r:WhH
if(sHeader.equals("Content-Length")) .hnGHX
{ 8\/E/o3
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); JQ!D8Ut
break; bc%7-%
} Bx2E9/S3
} Q']:k}y
else \3Ys8umKq
break; |0BmEF
} ,0;E_i7
} (',G
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catch(IOException e){e.printStackTrace ();} ;DBO
catch(Exception e){e.printStackTrace ();} BHqJ~2&FDW
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Utility.log(nFileLength); 76(&O
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return nFileLength; -&y{8<bu4H
} Xfk&{zO-j
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//保存下载信息(文件指针位置) 4,
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private void write_nPos() mbU[fHyV
{ &$|k<{j[<f
try{ Cj,fP[p#7
output = new DataOutputStream(new FileOutputStream(tmpFile)); O]90F
output.writeInt(nStartPos.length); USfOc
for(int i=0;i<nStartPos.length;i++) ~\(U&2t
{ r)q6^|~47
// output.writeLong(nPos); j'I$F1>Te
output.writeLong(fileSplitterFetch.nStartPos); Xb5n;=)
output.writeLong(fileSplitterFetch.nEndPos); h{VCx#!]
} bo`w(h_
output.close(); ZoF\1C ^
} ^3 F[^#"
catch(IOException e){e.printStackTrace ();} 8tY],
catch(Exception e){e.printStackTrace ();} rer=o S
} 77.5
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//读取保存的下载信息(文件指针位置) `dx+Qp
private void read_nPos() ts
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{ 4L(axjMYU
try{ Cir==7A0
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 48Z{wV,
int nCount = input.readInt(); W1i Kn
nStartPos = new long[nCount]; s+$l.aIO!
nEndPos = new long[nCount]; %HpTQ
for(int i=0;i<nStartPos.length;i++) *4dA(N\k"
{ p(:\)HP)R
nStartPos = input.readLong(); ;spuBA)[X
nEndPos = input.readLong(); n(0O'nS^
} 5a&[NN
input.close(); fYl$$.
} A!x_R {,yH
catch(IOException e){e.printStackTrace ();} pg ;agtI
catch(Exception e){e.printStackTrace ();} ehoDWO]S
} TY],H=
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private void processErrorCode(int nErrorCode) W -8<sv$b
{ {;=I69X
System.err.println("Error Code : " + nErrorCode); uL1e?
} =(3Qbb1i
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//停止文件下载 y9?B vPp+
public void siteStop() u yzc"di
{ 7AX<>^
bStop = true; ;lB%N
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for(int i=0;i<nStartPos.length;i++) t:9}~%~
fileSplitterFetch.splitterStop(); 4t|ril``]
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} x;?4A J{
} D\jRF-z
//负责部分文件的抓取 =hH>]$J[
**FileSplitterFetch.java k9vr6We'
*/ I QS|
package NetFox; E;fYL]j/oZ
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import java.io.*; ?kI-o0@O.
import java.net.*; @TdPeTw\
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public class FileSplitterFetch extends Thread { dP=1*
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String sURL; //File URL be |k"s|6)
long nStartPos; //File Snippet Start Position nw+L _b
long nEndPos; //File Snippet End Position $6Lgaz
int nThreadID; //Thread's ID |CexP^;!U
boolean bDownOver = false; //Downing is over 47ppyh6@
boolean bStop = false; //Stop identical hWfJh0I
FileAccessI fileAccessI = null; //File Access interface mqrP0/sN
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException G|Yw
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{ q.yS j
this.sURL = sURL; Oz#$x
this.nStartPos = nStart; 3;zJ\a.+
this.nEndPos = nEnd; Og4 X3QG
nThreadID = id; 9OuK}Ssf
fileAccessI = new FileAccessI(sName,nStartPos);//定位 KJo[!|.
} AU)"L_
i}
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public void run() >Vy=5)/i
{
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while(nStartPos < nEndPos && !bStop) QrDzfe[
{ :DXkAb2
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try{ I\&..e0l
URL url = new URL(sURL); q(M[ij
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); .h~M&d!
httpConnection.setRequestProperty("User-Agent","NetFox"); qAUqlSP5
String sProperty = "bytes="+nStartPos+"-"; P%z\^\p"5
httpConnection.setRequestProperty("RANGE",sProperty); T^B&GgW
Utility.log(sProperty); p+SFeUp
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InputStream input = httpConnection.getInputStream(); (cAv :EKpo
//logResponseHead(httpConnection); +Pd&YfU9
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byte[] b = new byte[1024]; a,b;H(em
int nRead; i[`nu#n/
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Q6@}t&k4C
{ y44FejH(v
nStartPos += fileAccessI.write(b,0,nRead); RIJ+]uir4
//if(nThreadID == 1) $v#Q'?jE
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); sesr`,m.,
} :~3sW< PR
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Utility.log("Thread " + nThreadID + " is over!"); *[*LtyCQt4
bDownOver = true; R/R[r> 1)6
//nPos = fileAccessI.write (b,0,nRead); \[Op:^S
} Vy.A`Hz
catch(Exception e){e.printStackTrace ();} gV1&b
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} 4-^|e
} ;2q;RT`h
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//打印回应的头信息 / tM<ois*
public void logResponseHead(HttpURLConnection con) K++pH~o
{ $,otW2:)
for(int i=1;;i++) t_6sDr'.
{ EGO;g^,
String header=con.getHeaderFieldKey(i); )_"Cz".|9
if(header!=null) ;X<#y2`
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 7Oe |:Z
Utility.log(header+" : "+con.getHeaderField(header)); w~y+Pv@
else rVowHP
break; 4j|]=58
} fIN8::Cs[
} >gM|:FG
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public void splitterStop() IE.JIi^w
{ b)9bYkd
bStop = true; wUHuykF
}
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} $j0]+vT
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/* o[q
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**FileAccess.java #qWa[kB
*//文件访问(定位,写) /s.sW l
package NetFox; ftq&<8
import java.io.*; y;<^[
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public class FileAccessI implements Serializable{ A]`63@- .
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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 >e
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RandomAccessFile oSavedFile; |B<+Y<)f^
long nPos; VJ;n0*/
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public FileAccessI() throws IOException J@C8;]
{ |V bF&*v`
this("",0); #X'!wr|-
} P0uUVU=B|
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public FileAccessI(String sName,long nPos) throws IOException ,u7:l
{ %myg67u
oSavedFile = new RandomAccessFile(sName,"rw"); x9XQ
this.nPos = nPos; u'M\m7
oSavedFile.seek(nPos); |K| c
} s<Pk[7`*
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public synchronized int write(byte[] b,int nStart,int nLen) ag^EH"%zw
{ r7o63]
int n = -1; G/>upnA{w
try{ 5VdF^.:u
oSavedFile.write(b,nStart,nLen); :\9E%/aAD
n = nLen; sYM3&ikyHI
} iIji[>qz
catch(IOException e) Tn,'*D@l
{ XBe!9/'k>
e.printStackTrace (); W}#eQ|oCV
} }D/0&