/* aqw;T\GI+~
**SiteFileFetch.java I+!?~]AUuq
*/ `|rr<Tsy\
package NetFox; [U^@Bk h
import java.io.*; R5,ISD
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import java.net.*; kKFhbHUZa
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public class SiteFileFetch extends Thread { WZ A8D0[
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SiteInfoBean siteInfoBean = null; //文件信息Bean )B!64'|M
long[] nStartPos; //开始位置 \FL`b{!+ N
long[] nEndPos; //结束位置 gG,"wzj
FileSplitterFetch[] fileSplitterFetch; //子线程对象 4Odf6v,*@
long nFileLength; //文件长度 %>mB"Y,
boolean bFirst = true; //是否第一次取文件 k"L?("~
boolean bStop = false; //停止标志 ZLS\K/F>>=
File tmpFile; //文件下载的临时信息 =o+js;3
DataOutputStream output; //输出到文件的输出流 z'!sc"]W6
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) |Ok=aV7
public SiteFileFetch(SiteInfoBean bean) throws IOException oIJ.Tv@N(
{ mdB~~j
siteInfoBean = bean; O0~Qh0~l
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); YQ`m;<
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); J ;|i6q q
if(tmpFile.exists ()) s?,\aSsU@
{ a3Fe42G2c|
bFirst = false; '",+2=JJ
read_nPos(); 0sR+@\
} |EjMpRNE
else D-S"?aO-
{ *}Cm/li/w
nStartPos = new long[bean.getNSplitter()]; !8Mi+ZV
nEndPos = new long[bean.getNSplitter()]; 8%,u~ELA
} u&npUw^Va
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} \G~<O071
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public void run() 'ZXd|WI
{ )_H>d<di
//获得文件长度 -Z<V?SFOK
//分割文件 q
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//实例FileSplitterFetch Q$B\)9`v[
//启动FileSplitterFetch线程 VmbfwHRWb
//等待子线程返回 b;~?a#Z}
try{ DQ{"6-
if(bFirst) @krh <T6|
{ tm#[.
nFileLength = getFileSize(); =*\(Y(0
if(nFileLength == -1) tDQo1,(oY
{ z"PU`v
System.err.println("File Length is not known!"); <AN=@`+
} C
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else if(nFileLength == -2) : 6|nXL
{ [a2Q ^ab
System.err.println("File is not access!"); i9O;D*
} 7FYq6wi
else vkK8D#K
{ -SeHz.`N
for(int i=0;i<nStartPos.length;i++) j}F;Bfq!
{ '0tNo.8K
nStartPos = (long)(i*(nFileLength/nStartPos.length)); KM&bu='L^
} 0/~20 KD{s
for(int i=0;i<nEndPos.length-1;i++) 0V!@*Z
{ |jw{7\+
nEndPos = nStartPos[i+1]; p8bAz
} f$I$A(0P
nEndPos[nEndPos.length-1] = nFileLength; y=k!>Y|E
} -q")qNt.
} ig}H7U2q@
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//启动子线程 pY"&=I79tb
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; L8.u7(-#
for(int i=0;i<nStartPos.length;i++) zYZ^/7)
{ A`
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fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), qQ^bUpk0
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), FS^ie|8{D-
nStartPos,nEndPos,i); )>+J`NFa
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _Y8RP%
fileSplitterFetch.start(); 0m>?-/uDx
} o7^u@*"F
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Hr}pO"%
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); kgGMA 7Jy
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", t}m"rMbt
nEndPos = " + nFileLength); @S#Ls="G
// fileSplitterFetch[nPos.length-1].start(); _2p D
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//等待子线程结束 M?I^Od'8
//int count = 0; 96P3B}Dk
//是否结束while循环 ~z&Ho
boolean breakWhile = false; 9{Xh wi)z
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while(!bStop) -l i71.M
{ 3uJ>:,~r
write_nPos(); =cKrp'
Utility.sleep(500); T.B}k`$
breakWhile = true; *R8qnvE\()
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for(int i=0;i<nStartPos.length;i++) ^ygh[.e,
{ RAY.]:}jr
if(!fileSplitterFetch.bDownOver) ,mm9X\ '
{ -h1FrDBt
breakWhile = false; ~9h/{$
break; ZB5u\NpcW
} v3Xt<I=4y
} vI1UFD
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if(breakWhile) 5nh:S0M6V
break; -gR
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//count++; eW.[M ?,
//if(count>4) {q^?Rw
// siteStop(); wW1>#F
} !dZpV~g0
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System.err.println("文件下载结束!"); r>.^4Z@
} Y&y5^nG
catch(Exception e){e.printStackTrace ();} 8iKupaaOX
} 4M3{P
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//获得文件长度 d`ESe'j:
public long getFileSize() 6j5?&)xJ
{ M%@=BT
int nFileLength = -1; ]YqeI*BX
try{ A_xUP9g@?
URL url = new URL(siteInfoBean.getSSiteURL()); Yt#e[CYnu
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ," ~4l&
httpConnection.setRequestProperty("User-Agent","NetFox"); MsLQ'9%Au
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int responseCode=httpConnection.getResponseCode(); u[yUUYe
if(responseCode>=400) ZW>?y$C+
{
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processErrorCode(responseCode); BBUXoz
return -2; //-2 represent access is error i=DoK{`L
} \[F4ooe
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String sHeader; WzxDnd<B
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for(int i=1;;i++) 5p5S_%R$e
{ ?Rg8u
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); RBM(>lU:
//Utility.log(in.readLine()); G>H',iOI
sHeader=httpConnection.getHeaderFieldKey(i); ^"hsbk&Yu
if(sHeader!=null) "J(7fL$!
{ T.R(
if(sHeader.equals("Content-Length")) A"`(^#a
{ .f~x*@
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ' *x?8-K P
break; FMBzTD
} M+q|z0 U
} ~.'NG?
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else 1XvB,DhJ
break; #w<:H1,4
} jf'#2-
} BoMf#l.3B
catch(IOException e){e.printStackTrace ();} KXy|Si8w
catch(Exception e){e.printStackTrace ();} ob3Z
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Utility.log(nFileLength); )s';m$
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return nFileLength; cr_Q,*
} rBUdHd9
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//保存下载信息(文件指针位置) ?[K\X
private void write_nPos() USrg,A
{ QA3q9,C"
try{ 3%$nRP
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output = new DataOutputStream(new FileOutputStream(tmpFile)); 0W1=9+c|X
output.writeInt(nStartPos.length); |( =`l
for(int i=0;i<nStartPos.length;i++) .5PcprE/
{ ixFuqPij
// output.writeLong(nPos); &bO0Rn1F
output.writeLong(fileSplitterFetch.nStartPos); xo46L\
output.writeLong(fileSplitterFetch.nEndPos); 38hA guZX
} Im\{b=vT
output.close(); c>*RQ4vE
} @'yD(ZMAz
catch(IOException e){e.printStackTrace ();} Y=#g_(4*
catch(Exception e){e.printStackTrace ();} s)~60c
} '[h|f
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//读取保存的下载信息(文件指针位置) ,.ln
private void read_nPos() Y:0SrB!\
{ z7H[\ 4A!>
try{ 3B<$6
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); j+c<0,Kj
int nCount = input.readInt(); h6dVT9
nStartPos = new long[nCount]; 3Hli^9&OX_
nEndPos = new long[nCount]; ^BruRgc+
for(int i=0;i<nStartPos.length;i++) MOIH%lpe
{ `<C/-Au
nStartPos = input.readLong(); B0^0d*8t|@
nEndPos = input.readLong(); i-b++R/WN
}
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input.close(); 'RlPj0Cg
} JKkR963 O
catch(IOException e){e.printStackTrace ();} jI8qiZ);~
catch(Exception e){e.printStackTrace ();} yBPaGZ{f
} `.FvuwP
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private void processErrorCode(int nErrorCode) $Qv+*%c
{ ~8-Z=-
System.err.println("Error Code : " + nErrorCode); H?P:;1A]c
} C
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//停止文件下载 tBp146`
public void siteStop() ^+JpI*,
{ }/yhwijg
bStop = true; -
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for(int i=0;i<nStartPos.length;i++) /hef3DV5I
fileSplitterFetch.splitterStop(); (= H%VXQH
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} l!plw,PYC
} &sp7YkaW
//负责部分文件的抓取 6BihZ|H04
**FileSplitterFetch.java X;7gh>Q'4
*/ m"~^-mJ-
package NetFox; 9ZL3p!
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import java.io.*; '*5I5'[ X,
import java.net.*; LFCcV<~
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public class FileSplitterFetch extends Thread { xq2{0q
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String sURL; //File URL }jM&GH1
long nStartPos; //File Snippet Start Position -bo5/`x
long nEndPos; //File Snippet End Position eU"!X9
int nThreadID; //Thread's ID jmbwV,@Q2
boolean bDownOver = false; //Downing is over (KDUX
t.
boolean bStop = false; //Stop identical }@Ij}Ab>
FileAccessI fileAccessI = null; //File Access interface `/:ZB6
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException YK/?~p9:
{ |hjm^{!TpW
this.sURL = sURL; u=h:d+rq@
this.nStartPos = nStart; $ ZD1_sJ.
this.nEndPos = nEnd; {$,e@nn
nThreadID = id; :A\8#]3
fileAccessI = new FileAccessI(sName,nStartPos);//定位 njveZav
} r^mP'#
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public void run() ugEh}3
{ bwG2=
while(nStartPos < nEndPos && !bStop) ^[noGjy
{ 1D03Nbh|5
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try{ .eAN`-t;
URL url = new URL(sURL); QAigbSn]
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); G[1:<Vg8
httpConnection.setRequestProperty("User-Agent","NetFox"); N/QTf1$
String sProperty = "bytes="+nStartPos+"-"; Z~o6%_xe
httpConnection.setRequestProperty("RANGE",sProperty); \WG6\Zg0A
Utility.log(sProperty); cv(9v =](
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InputStream input = httpConnection.getInputStream(); 7q<2k_3<
//logResponseHead(httpConnection); &13qlc6
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byte[] b = new byte[1024]; Vu '3%~
int nRead; TT3GFP
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) \kU0D
{ /s"mqBXCG
nStartPos += fileAccessI.write(b,0,nRead); ;Bk?,g
//if(nThreadID == 1) rmS.$h@7 m
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); n`Pwo&
} HV-c
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Utility.log("Thread " + nThreadID + " is over!"); :DTKZ9>2D
bDownOver = true; ?El8:zt? |
//nPos = fileAccessI.write (b,0,nRead); _FXvJ}~m
} f]MKNX
catch(Exception e){e.printStackTrace ();} ,U+y)w]ar
} /E F0~iy
} U|QLc
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//打印回应的头信息 F+mn d,3
public void logResponseHead(HttpURLConnection con) hI.@!$~=
{ +;uP)
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for(int i=1;;i++) e^)+bmh
{ N t]YhO
String header=con.getHeaderFieldKey(i); 8yEN)RqI
if(header!=null) W($}G_j[B1
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 4RCD<7
Utility.log(header+" : "+con.getHeaderField(header)); o$]wd*+
else (_h<<`@B
break;
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} b^[Ab:`}[V
} oc+TsVt
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public void splitterStop() K.s\xA5`_
{ EXDZehLD<]
bStop = true; .)L%ANf
} \c1u$'| v
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} IE7%u92
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/* M0Y#=u.
**FileAccess.java +XV7W=
*//文件访问(定位,写) Y+vG]?D
package NetFox; Dv~W!T i
import java.io.*; 0LEJnl
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public class FileAccessI implements Serializable{ N 4Kj)E@
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 nn[OC=cDN
RandomAccessFile oSavedFile; ?=zF]J:G1w
long nPos; A[W3.$s
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public FileAccessI() throws IOException L'(ei7Z
{ 7i-G5%w7
this("",0); \ZN> 7?Vs
} ^pgVU&-~]/
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public FileAccessI(String sName,long nPos) throws IOException sz;B-1^6
{ P1cI]rriW
oSavedFile = new RandomAccessFile(sName,"rw"); u!4i+7}
this.nPos = nPos; ViZ Tl~
oSavedFile.seek(nPos); xF4S
} VcI'+IoR?
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public synchronized int write(byte[] b,int nStart,int nLen) -|F(qf
{ s{g^K#BoFi
int n = -1; R( 2,1f=d
try{ vwF#;jj\
oSavedFile.write(b,nStart,nLen); O_vCZW
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n = nLen; KHnq%#
} tqok.h
catch(IOException e) f/"?(7F
{ }Pi}?
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e.printStackTrace (); M N-j$-y}
} iO$Z?Dyg9
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return n; =:neGqd\_E
} >)`yG'[
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} <!qN<#$y
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/* Y\7WCaSgi
**SiteInfoBean.java LIah'6qR
*/ ;@5N
package NetFox; XC*!=h*
_8QHx;}
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public class SiteInfoBean { 4hl`~&yDf
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private String sSiteURL; //Site's URL n]nb+_-97
private String sFilePath; //Saved File's Path Z'Uc}M'U
private String sFileName; //Saved File's Name Fu%D2%V$/
private int nSplitter; //Count of Splited Downloading File i!yu%>:M
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public SiteInfoBean() :`Sd5b>
{//nSplitter的缺省值为5 +HAd=DU
//default value of nSplitter is 5 [B_(,/?
this("","","",5); &$H7vdWNy
} XEX-NE"]
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) qI=j>x
{ w^EUBRI-
sSiteURL= sURL; =6YffXa_s
sFilePath = sPath; w *Txc}
sFileName = sName; [}*xxy
this.nSplitter = nSpiltter; 0?80V'
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} &YpWfY&V