/* "TJ*mN.i{}
**SiteFileFetch.java ~D>pu%F
*/ R^$|D)(
package NetFox; ;Xy=;Z.]i
import java.io.*; %T\hL\L?
import java.net.*; 8*@{}O##
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public class SiteFileFetch extends Thread { kaXq.
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SiteInfoBean siteInfoBean = null; //文件信息Bean @aZ Tx/
long[] nStartPos; //开始位置 P!E2.K,
long[] nEndPos; //结束位置 5K 2K'ZkI
FileSplitterFetch[] fileSplitterFetch; //子线程对象 &H]/'i-
long nFileLength; //文件长度 RG""/x;
boolean bFirst = true; //是否第一次取文件 [5& nH@og
boolean bStop = false; //停止标志 #MlpOk*G
File tmpFile; //文件下载的临时信息 @qan &?-Y
DataOutputStream output; //输出到文件的输出流 ~^V&n`*7D
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) XWnP(C9?
public SiteFileFetch(SiteInfoBean bean) throws IOException w$6Z}M1d
{ R-j*fO}
siteInfoBean = bean; GPK\nz}
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 1*Pxndt&
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); /De~K+w7o
if(tmpFile.exists ()) .=
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{ cO*g4VL"[
bFirst = false; `H6~<9r
read_nPos(); 3>-h-
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} 0Zi+x#&d
else &.\7='$F
{ 3g;,
nStartPos = new long[bean.getNSplitter()]; +Gt9!x}#e
nEndPos = new long[bean.getNSplitter()]; m]!hP^^
} )/%5f{+}
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public void run() ,M;9|kE*
{ o~IAZU39
//获得文件长度 ~qrSHn}+PU
//分割文件
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//实例FileSplitterFetch 3@Mh* \;\b
//启动FileSplitterFetch线程 X!ruQem /
//等待子线程返回 fk5'v
try{ [jzsB:;XB&
if(bFirst) O*~z@"\
{ _(F-(X|
nFileLength = getFileSize(); )6C+0b*
if(nFileLength == -1) pWGR#x'
{ ]`|$nU}v
System.err.println("File Length is not known!"); 3W%6n-*u
} eKvr1m- -
else if(nFileLength == -2) *uhQP47B
{ p35=CX`T.
System.err.println("File is not access!"); I[Lg0H8
} /;#kV]nF
else b4e~Z
{ %- 540V{q
for(int i=0;i<nStartPos.length;i++) &sWr)>vs
{ p8~lGuH
nStartPos = (long)(i*(nFileLength/nStartPos.length)); wW@e#:
} )N&SrzqTK
for(int i=0;i<nEndPos.length-1;i++) oQ<[`.s
{ FN-/~Su~J
nEndPos = nStartPos[i+1]; MO8}i?u=z
} FOsd{Fw
nEndPos[nEndPos.length-1] = nFileLength; #dWz,e3
} Lj<TzPzg*
} P_1WJ
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//启动子线程 G+8)a$?v
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; E+@Q
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for(int i=0;i<nStartPos.length;i++) {Ya$Q#l
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fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (BVqmi{
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), C
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nStartPos,nEndPos,i); &-yRa45?
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); K
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fileSplitterFetch.start(); 6DHK&<=D8
} +?{"Q#.>;
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), mrP48#Y+l
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); yS
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// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ZL6HD n!
nEndPos = " + nFileLength); cmG27\c RO
// fileSplitterFetch[nPos.length-1].start(); j#5a&Z
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//等待子线程结束 ?% 24M\
//int count = 0; .*-8rOcc
//是否结束while循环 ! Ld5Y$
boolean breakWhile = false; u /F!8#
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while(!bStop) #Q8_:dPY
{ f1 x&Fk
write_nPos(); %R c#/y
Utility.sleep(500); JY,$B-l
breakWhile = true; Zd[rn:9\
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for(int i=0;i<nStartPos.length;i++) OTXZdAv
{ 5~[7|Y
if(!fileSplitterFetch.bDownOver) _nMd
{ 9Y:I)^ek
breakWhile = false; 3x+lf4"
break; 0Qt!w(
} E )_n?>Ar
} bw P=f.
if(breakWhile) ,>a!CnK=
break; j&d5tgLB
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//count++; P8z%*/
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//if(count>4) ,eyh%k*hz
// siteStop(); 8_('[89m
} O
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System.err.println("文件下载结束!"); Jl~ *@0(
} VHD+NY/
catch(Exception e){e.printStackTrace ();} WywS1viD
} Dp([r
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//获得文件长度 x6UXd~
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public long getFileSize() SOOVUMj
{ z\]Z/Bz:6
int nFileLength = -1; NU=ru/
try{ r].n=455[
URL url = new URL(siteInfoBean.getSSiteURL()); ~7PD/dre
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); :V'99Esv`
httpConnection.setRequestProperty("User-Agent","NetFox"); "v1{
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int responseCode=httpConnection.getResponseCode(); 1rm\ u%
if(responseCode>=400) &b} \).5E
{ uHg q"e
processErrorCode(responseCode); LiG$M{ 0
return -2; //-2 represent access is error &i5@4,p y9
} vjS`;^9
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String sHeader; !Km[Qw
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for(int i=1;;i++) dCd~]CI
{ <\&9Odqc
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ukiWNF/
//Utility.log(in.readLine()); aK_5@8+ZD
sHeader=httpConnection.getHeaderFieldKey(i); EF`}*7)
if(sHeader!=null) u} ot-!}Q
{ 0g?)j-
if(sHeader.equals("Content-Length")) :$k*y%Z*N&
{ <s9{o
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nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); N:lfKI
break; {kpF etXt?
} ]fM|cN8(zM
} ;{ifLI0#
else m;@q('O
break; :PO./IBX
} AF'<
} %(YQ)=w
catch(IOException e){e.printStackTrace ();} v;]rFc#Px[
catch(Exception e){e.printStackTrace ();} $mQ0w~:@
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Utility.log(nFileLength); *Al@|5
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return nFileLength; P[3i!"O>
} 25SWIpgG
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//保存下载信息(文件指针位置) )~U1sW&t
private void write_nPos()
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{ =QqH`.3
try{ &A0OYV3i.
output = new DataOutputStream(new FileOutputStream(tmpFile)); z<%P"
output.writeInt(nStartPos.length); Nr4}x7
for(int i=0;i<nStartPos.length;i++) #V>R#Oh}
{ %f]#P8VP
// output.writeLong(nPos); y[_k/.1
output.writeLong(fileSplitterFetch.nStartPos); _uIS[%4g
output.writeLong(fileSplitterFetch.nEndPos); FZi@h
} Sm'Tz&!
output.close(); h( | T.
} Z
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catch(IOException e){e.printStackTrace ();} Hyb(.hlZh
catch(Exception e){e.printStackTrace ();} 2K}49*
} 4XpWDfa.}
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//读取保存的下载信息(文件指针位置) ]+D@E2E
private void read_nPos() rB[J*5v
{ #mQ@4k9i
try{ $+4DpqJ
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); :;{M0
int nCount = input.readInt(); Btm,'kBG
nStartPos = new long[nCount]; 6v)TCj/
nEndPos = new long[nCount]; SQN?[v
for(int i=0;i<nStartPos.length;i++) N5?bflY
{ ^k6_j\5j
nStartPos = input.readLong(); :v^/k]S
nEndPos = input.readLong(); D3o,2E(o
} !5ps,+o
input.close(); Os9SfL
} /QXUD.(
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catch(IOException e){e.printStackTrace ();} 3xyrWl
catch(Exception e){e.printStackTrace ();} z
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} t`o"K
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private void processErrorCode(int nErrorCode) j`_S%E% X
{ @A,8>0+
System.err.println("Error Code : " + nErrorCode); +CSpL2@
} o~LJ+m6-)
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//停止文件下载 NUsxMhP
public void siteStop() ;.}L#'0j
{ '@{:FrG*U
bStop = true; io#}z4"'qY
for(int i=0;i<nStartPos.length;i++) KIF9[/P
fileSplitterFetch.splitterStop(); x9l7|G/$
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} u^2`$W
} alb3oipOB
//负责部分文件的抓取 [> HKRVy
**FileSplitterFetch.java [mtp-4*
*/ ob7'''i
package NetFox; gVG^R02#<k
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import java.io.*; *)K
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import java.net.*; Sz0PZtJ
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public class FileSplitterFetch extends Thread { F.vRs|fk
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String sURL; //File URL ^Om}9rXw1
long nStartPos; //File Snippet Start Position L( 6b2{"
long nEndPos; //File Snippet End Position !f~a3 {;j
int nThreadID; //Thread's ID )qxt<
boolean bDownOver = false; //Downing is over _U~R
boolean bStop = false; //Stop identical (5$Ge$
FileAccessI fileAccessI = null; //File Access interface Z ]A
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException b**vUt\
{ iK}p#"si
this.sURL = sURL; KsULQJ#,
this.nStartPos = nStart; c9/w{}F
this.nEndPos = nEnd; JH?ohA
nThreadID = id; ,3:f4e\<
fileAccessI = new FileAccessI(sName,nStartPos);//定位 SdH=1zBc
} s$fM,l:!
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public void run() k3Yu"GY^
{ do" m=y
while(nStartPos < nEndPos && !bStop) vj?{={Y
{ 7
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try{ 971=OEyq*
URL url = new URL(sURL); \,;glY=M!
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); n.+*_c8 k
httpConnection.setRequestProperty("User-Agent","NetFox"); OX"Na2-el
String sProperty = "bytes="+nStartPos+"-"; /d&m#%9Up]
httpConnection.setRequestProperty("RANGE",sProperty); x1:mT[[$
Utility.log(sProperty); P-X|qVNK1Z
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InputStream input = httpConnection.getInputStream(); *R6lK&
//logResponseHead(httpConnection); I_1?J*
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byte[] b = new byte[1024]; \Z5Wp5az},
int nRead; wUvE
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) jIKg* @
{ S?v/diK ]J
nStartPos += fileAccessI.write(b,0,nRead); )G48,.
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//if(nThreadID == 1) <)d%c%f'`
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "~Fg-{jM%
} INndTF
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Utility.log("Thread " + nThreadID + " is over!"); j~'.XD={
bDownOver = true; Hzz{wY
//nPos = fileAccessI.write (b,0,nRead); "ku[b\W
} a?gF;AYk
catch(Exception e){e.printStackTrace ();} ~gX1n9_n
} uyX
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} ?8
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//打印回应的头信息 SkDr4kds
public void logResponseHead(HttpURLConnection con) @!iS`u
{ [#KY.n
for(int i=1;;i++) Jxl'!8t
{ WsbVO|C
String header=con.getHeaderFieldKey(i); u(zgKoF9A
if(header!=null) <0';2yP"
//responseHeaders.put(header,httpConnection.getHeaderField(header)); nf
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Utility.log(header+" : "+con.getHeaderField(header)); ,!>
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else 4Uny.C]
break; Yo %U{/e
} t'K+)OK
} ;"D}"nL
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public void splitterStop() 45 biy(qa
{ @,<jPR.
bStop = true; /3)\^Pof
} FH}?QebSR
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} }8^qb5+!3
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/* "e-z2G@z
**FileAccess.java knO
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*//文件访问(定位,写) gb,ZN^3<-
package NetFox; 10Eun }
import java.io.*; XU7to]'K
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public class FileAccessI implements Serializable{ ^S|qGu,G
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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 xR-;,=J
RandomAccessFile oSavedFile; {)Wf[2zJ
long nPos; ?Nt( sZ-
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public FileAccessI() throws IOException IWYQ67Yj
{ k*_Gg
this("",0); [xGwqa03
} gI7*zR4D
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public FileAccessI(String sName,long nPos) throws IOException ,LZA\XC
{ W(s5mX,Kv
oSavedFile = new RandomAccessFile(sName,"rw"); @Yt394gA%\
this.nPos = nPos; I{w(`[Nxw*
oSavedFile.seek(nPos); zgFL/a<
} oY ~q^Y
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public synchronized int write(byte[] b,int nStart,int nLen) & *tL)qKDc
{ ,~7~ S"
int n = -1; =
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try{ '-myOM7
oSavedFile.write(b,nStart,nLen); 6}Y==GPt
n = nLen; [!U%''
} H%vgPQ8
catch(IOException e) 6,4vs+(|\
{ Wpf~Ji6||
e.printStackTrace (); a6zWg7 PN
} RQ0^
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return n; @@@}FV&
} !{,2uQXe
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} Z>UM gu3c
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/* "~ =O`5V
**SiteInfoBean.java S?Cd,WxT
*/ m>Z3p7!N}
package NetFox; O-.G("
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public class SiteInfoBean { w3i74C&0
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private String sSiteURL; //Site's URL @u$NB3
private String sFilePath; //Saved File's Path R{[v#sF >#
private String sFileName; //Saved File's Name "KF]s.
private int nSplitter; //Count of Splited Downloading File !pj&