/* \tN-(=T
**SiteFileFetch.java SUM4Di7
*/ #oni:] E!m
package NetFox; {Ui=b+
import java.io.*; eq4C+&O&
import java.net.*; 4\M.6])_
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public class SiteFileFetch extends Thread { p-SJ6Gg
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SiteInfoBean siteInfoBean = null; //文件信息Bean VQ#3#Hj
long[] nStartPos; //开始位置 tmUFT
long[] nEndPos; //结束位置 o*rQP!8,oy
FileSplitterFetch[] fileSplitterFetch; //子线程对象 x1&W^~
long nFileLength; //文件长度 2L?!tBw?1
boolean bFirst = true; //是否第一次取文件 $~;D9
boolean bStop = false; //停止标志 -E"GX
File tmpFile; //文件下载的临时信息 GH1"xR4!
DataOutputStream output; //输出到文件的输出流 [`RX*OH2
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) u8GMUN
public SiteFileFetch(SiteInfoBean bean) throws IOException cWyW~Ek
{ `n5"0QRd
siteInfoBean = bean; Uyx!E4pl(
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ~@.%m"<.
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 3&&9_`r&_
if(tmpFile.exists ()) d;mx<i=/
{ )lk&z8;.=
bFirst = false; 0&_UH}10
read_nPos(); jz58E}
} Y5ZZ3Ati
else M-V&X&?j
{ F#
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nStartPos = new long[bean.getNSplitter()]; 9d[5{"2j
nEndPos = new long[bean.getNSplitter()]; D,qu-k[jMI
} #n0Y6Pr
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} y\dEk:\)
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public void run() R218(8S
{ k@ZLg9
//获得文件长度 xj5;: g#!
//分割文件 B33$pUk
//实例FileSplitterFetch ABE@n%|`
//启动FileSplitterFetch线程 ,to+oSZE
//等待子线程返回 Tm_B^W}
try{ c:Wze*vI;
if(bFirst) om?-WJI
{ g<{xC_J
nFileLength = getFileSize(); )q7UxzE+
if(nFileLength == -1) m<FOu<y
{
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System.err.println("File Length is not known!"); NT@;N /I
} xk&Jl#v
else if(nFileLength == -2) JRo?s~Ih
{ B#/Q'V
System.err.println("File is not access!"); b4^`DHRu6
} ;q N+^;,2
else E|'h]NY
{ M@0;B30L
for(int i=0;i<nStartPos.length;i++) @2'Mt}R>
{ 2{|h8oz
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 7i&:DePM'q
} T^J >ZDA
for(int i=0;i<nEndPos.length-1;i++) E4m`
{ \]$IDt(s
nEndPos = nStartPos[i+1]; K2%w0ohC
} p+)Y Tzzc
nEndPos[nEndPos.length-1] = nFileLength; 3U_2! zF3_
} V< k8N^
} C8z{XSo
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//启动子线程 >4t+:Ut:
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; UTXSeNP
for(int i=0;i<nStartPos.length;i++) OS8q( 2z?s
{ (?nCyHC%g
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 0RoU}r@z4
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ^Q+g({
nStartPos,nEndPos,i); /0Ax*919j
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Z+@2"%W
fileSplitterFetch.start(); E Cyyl
} U8
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {%_L=2n6
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); "etPT@gF
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 8#vc(04(
nEndPos = " + nFileLength); %2v4<icvq
// fileSplitterFetch[nPos.length-1].start(); )"pF R4
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//等待子线程结束 pR~U`r5z
//int count = 0; 8<Hf"M
//是否结束while循环 5LOo8xN
boolean breakWhile = false; _4g.j
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while(!bStop) -Z's@'*
{
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write_nPos(); D*lKn62
Utility.sleep(500); K5lmVF\$P
breakWhile = true; EY tQw(!Q
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for(int i=0;i<nStartPos.length;i++) '3g[]M@M
{ b9!FC$^J
if(!fileSplitterFetch.bDownOver) WYr/oRO
{ BqT y~{)+
breakWhile = false; r(P(Rj2~
break; @Z12CrJ
} =zz~kon9
} #"B\UN
if(breakWhile) M]J^N#
break; HPZ}*m'
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//count++; V;v8=1t!
//if(count>4) R~PA1wDZ
// siteStop(); #)nSr
} Om5Y|v"*
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System.err.println("文件下载结束!"); n^g|Ja
} (=om,g}
catch(Exception e){e.printStackTrace ();} _WRFsDZ'
} 3eF-8Z(f
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//获得文件长度 ~Yy>zUH^X
public long getFileSize() Rd#WMo2Xd
{ ojanBg
int nFileLength = -1; Ys\Wj%6A
try{ Rx}$0c0
URL url = new URL(siteInfoBean.getSSiteURL()); '!eKTC>
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~GZY 5HF
httpConnection.setRequestProperty("User-Agent","NetFox"); ):[7E(F=
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int responseCode=httpConnection.getResponseCode(); ,Pdf,2
if(responseCode>=400) IhVO@KJI
{ vwxXgk
processErrorCode(responseCode); ?k(7 LX0j
return -2; //-2 represent access is error ;;#qmGoE
} r2,.abo
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String sHeader; 'ZDp5pCC;
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for(int i=1;;i++) zdYy^8V|z
{ =\H!GT
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); PoxK{Y
//Utility.log(in.readLine()); +lHjC$
sHeader=httpConnection.getHeaderFieldKey(i); t%E!o0+8Z
if(sHeader!=null) `)T13Xv
{ KbA?7^zo`
if(sHeader.equals("Content-Length")) n$$SNWgM
{ R}*_~7r5
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 8Djc
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break; *%%g{
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} VHIOwzC
} w5Y04J
else 7/I, HxXp!
break; 3h$6t7=C
} <
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} &m-PC(W+
catch(IOException e){e.printStackTrace ();} E87Ww,z8
catch(Exception e){e.printStackTrace ();} tMf}
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Utility.log(nFileLength); leTf&W
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return nFileLength; J IUx
} JB<Sl4
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//保存下载信息(文件指针位置) 9\_eK,*B
private void write_nPos() ;$.J3!
{ '>-gi}z7
try{ m
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output = new DataOutputStream(new FileOutputStream(tmpFile)); A%KDiIA
output.writeInt(nStartPos.length); Z2qW\E^_r
for(int i=0;i<nStartPos.length;i++) /5(Yy}
{ %A1o.{H
// output.writeLong(nPos); TO]@
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output.writeLong(fileSplitterFetch.nStartPos); ~*z% e*EL
output.writeLong(fileSplitterFetch.nEndPos); gOSJM1Mr3
} ME46V6[LX]
output.close(); =P't(<
} Q(wx nm
catch(IOException e){e.printStackTrace ();} a&/#X9/
catch(Exception e){e.printStackTrace ();} TaKLzd2
} d3ZdB4L
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//读取保存的下载信息(文件指针位置) %5M/s'O?i
private void read_nPos() zzTfYf)
{
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try{ u0|8Tgf
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); }B\a<0L/
int nCount = input.readInt(); X' H[7 ^W
nStartPos = new long[nCount]; a{^m-fSaR"
nEndPos = new long[nCount]; gQWa24
for(int i=0;i<nStartPos.length;i++) 0D\#Pq
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{ }X)&zenz
nStartPos = input.readLong(); ,':fu
nEndPos = input.readLong(); e:fy#,HEj{
} xS4w5i2
input.close(); SUCMb8
} n.!#P|
catch(IOException e){e.printStackTrace ();} RYQ<Zr$!
catch(Exception e){e.printStackTrace ();} #@YPic"n7`
} .}t~'*D
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private void processErrorCode(int nErrorCode) _=_Px@<Q
{ ,k )w6)
System.err.println("Error Code : " + nErrorCode); 1+szG1U=
} ~.{/0T
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//停止文件下载 Q sZx)
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public void siteStop() PRu 6xsyA
{ .7e2YI,S
bStop = true; JD)(oK%C
for(int i=0;i<nStartPos.length;i++) <*16(!k0
fileSplitterFetch.splitterStop(); tItX y
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} Jj!vh{
} I4/8 _)b^
//负责部分文件的抓取 "6MVvpy"
**FileSplitterFetch.java QdT}wkX
*/ CR8/Ke
package NetFox; 1"zDin!A
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import java.io.*; sGyeb5c
import java.net.*; [Y|8\Ph`&
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public class FileSplitterFetch extends Thread { UW N*j_9i
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String sURL; //File URL Y2a5bc P
long nStartPos; //File Snippet Start Position t2/#&J]
long nEndPos; //File Snippet End Position 6IBgt!=,
int nThreadID; //Thread's ID Yw4n-0g
boolean bDownOver = false; //Downing is over R)_%i<nq\
boolean bStop = false; //Stop identical fol,xMc&
FileAccessI fileAccessI = null; //File Access interface tNO-e|~'
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `NCwK6/i
{ od IV:(
this.sURL = sURL; d/PiiiFf,
this.nStartPos = nStart; U{7w#>V
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this.nEndPos = nEnd; ~HTmO;HNf"
nThreadID = id; xf<at ->
fileAccessI = new FileAccessI(sName,nStartPos);//定位 mw_~*Nc'9
} 5's87Z;6
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public void run() Ov5"
{ w`4=_J=GO
while(nStartPos < nEndPos && !bStop) 7E!IF>`
{ >6NRi /[
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try{ 4" Cb/y3
URL url = new URL(sURL); "S8uoSF`>
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "fG8?)d;
httpConnection.setRequestProperty("User-Agent","NetFox"); n!YKz"$
String sProperty = "bytes="+nStartPos+"-"; !TAlBkj
httpConnection.setRequestProperty("RANGE",sProperty); f%SZg!+t
Utility.log(sProperty); DK$X2B"c V
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InputStream input = httpConnection.getInputStream(); >"|B9Woc
//logResponseHead(httpConnection); I;e=0!9U
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byte[] b = new byte[1024]; `bFff%_
int nRead; I KqQ>Z-q~
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) dCE0$3'5
{ < vL,*.zd
nStartPos += fileAccessI.write(b,0,nRead); HBy[FYa4
//if(nThreadID == 1) 1,6}_MA
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9KDEM gCW
} Lx\8Z=
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Utility.log("Thread " + nThreadID + " is over!"); N*"p|yhd]
bDownOver = true; '10oK {m$
//nPos = fileAccessI.write (b,0,nRead); (zgW%{V@
} 0xxg|;h.,g
catch(Exception e){e.printStackTrace ();} O[I\A[*
}
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} *AG#316
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//打印回应的头信息 &,}j#3<
public void logResponseHead(HttpURLConnection con) JW{rA6?
{ q)Lu_6 mg
for(int i=1;;i++) 3N dq>
{
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String header=con.getHeaderFieldKey(i); k,85Y$`'
if(header!=null) M.x=<:upp
//responseHeaders.put(header,httpConnection.getHeaderField(header)); gnFr}L&j
Utility.log(header+" : "+con.getHeaderField(header)); C9~52+S
else ",^Mxm{
break; kqM045W7
} ]^Qn
} oI=fx Sjd
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public void splitterStop() GR
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{ z2MWN\?8
bStop = true; eFaO7mz5V%
} "]"|"0#i
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} RZHd9v$
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/* !
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**FileAccess.java 'JCZ]pZ
*//文件访问(定位,写) VXYK?Qc'
package NetFox; S& SQ
import java.io.*; OHeT,@(mh
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public class FileAccessI implements Serializable{ R$q;
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 jE}33"
RandomAccessFile oSavedFile; &^#VN%{
long nPos; H7d/X
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public FileAccessI() throws IOException - db_E#
{ P+s!|7'
this("",0); nSW=LjrO~<
} eCqHvMp
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public FileAccessI(String sName,long nPos) throws IOException :<hXH^n
{ F@mQQ
oSavedFile = new RandomAccessFile(sName,"rw"); r~/
this.nPos = nPos; rf>0H^r
oSavedFile.seek(nPos); ?$*SjZt
} VtnRgdJ
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public synchronized int write(byte[] b,int nStart,int nLen) AyNI$Q6Z
{ *VFf.aPwYi
int n = -1; fz\9 S
try{ t"=
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oSavedFile.write(b,nStart,nLen); 2nSSFx r
n = nLen; >33=<~#n
} '
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catch(IOException e) g]4(g<:O
{ >Db;yC&
e.printStackTrace (); Ov-icDMm
} OW3sS+y
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return n; YL]Z<%aKt
} |G?htZF
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} t=Xv;=daB
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/* CDP
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**SiteInfoBean.java {OXFN;2
*/ ,q}MLTSi
package NetFox; H@q?v+2
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public class SiteInfoBean { _H j!2 '
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private String sSiteURL; //Site's URL H5Z$*4%G
private String sFilePath; //Saved File's Path q35f&O;
private String sFileName; //Saved File's Name 7]blrN]
private int nSplitter; //Count of Splited Downloading File 4)A#2
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public SiteInfoBean() v^#~98g]
{//nSplitter的缺省值为5 j`~Ms>
//default value of nSplitter is 5 wE? 'Cl
this("","","",5); KwPOO{4]g
} B" !l2
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) @\f^0^G
{ S/9DtXQ
sSiteURL= sURL; ,n3a
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sFilePath = sPath; \l9qt5rS
sFileName = sName; Dey<OE&
this.nSplitter = nSpiltter; G+X
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} 2QJ{a46}
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public String getSSiteURL() <Bw^!.jAF
{ X!9 B2w
return sSiteURL; #,":vr
} j$?{\iXZ
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public void setSSiteURL(String value) i*/Yz*<
{ f;W|\z'
sSiteURL = value; 7?GIS '
} 8B\2Zfe
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public String getSFilePath() `f*Q$Ulqx
{ Gn ~6X-l
return sFilePath; r76J
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} @ycDCB(D}
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public void setSFilePath(String value) tt0f-:#
{ @zU6t|mhz
sFilePath = value; HY&aV2|A1
} }bdmomV
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public String getSFileName() ms*(9l.hOK
{ I%sFqh>
return sFileName; o<COm9)i
} 0K`#>}W#X
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public void setSFileName(String value) !cO]<