/* I
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**SiteFileFetch.java *J`O"a
*/ ZPYS$Ydy
package NetFox; 9x=Y^',5
import java.io.*; 6T`i/".
import java.net.*; bOY |H~
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public class SiteFileFetch extends Thread { P5ywhw-
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SiteInfoBean siteInfoBean = null; //文件信息Bean qUb&
long[] nStartPos; //开始位置 t"oeQ*d%
long[] nEndPos; //结束位置
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FileSplitterFetch[] fileSplitterFetch; //子线程对象 8KzkB;=n
long nFileLength; //文件长度 lrIe"H@
boolean bFirst = true; //是否第一次取文件 L.JT[zOfb
boolean bStop = false; //停止标志 j1T#yt
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File tmpFile; //文件下载的临时信息 1bwOmhkS
DataOutputStream output; //输出到文件的输出流 ^^ixa1H<
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 6.yu-xm
public SiteFileFetch(SiteInfoBean bean) throws IOException om:VFs\U
{ "fOV^B
siteInfoBean = bean; s!$a\ k
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); :Zw2'IV
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); AH~E )S
if(tmpFile.exists ()) R.<g3"Lm>
{ {E|$8)58i
bFirst = false; (TT}6j
read_nPos(); \ @2R9,9E
} +ami?#Sz*;
else DZtsy!xA
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nStartPos = new long[bean.getNSplitter()]; KF:78C
nEndPos = new long[bean.getNSplitter()]; \Yr Ue1
} ,r_Gf5c
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} Yrq~5)%
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public void run() 5*u+q2\F
{ xr^LFn)
//获得文件长度 E|shs=I
//分割文件 8P\Zo8}v
//实例FileSplitterFetch W ]8QM1$
//启动FileSplitterFetch线程 j8:\%|
//等待子线程返回 Dk5 1z@
try{ 'i|YlMFI g
if(bFirst) <t!W5q
{ nKj7.,>;:<
nFileLength = getFileSize(); Q^^niVz
if(nFileLength == -1) tw)mepwB
{ ^E>3|du]O
System.err.println("File Length is not known!"); ~WF\
} 7D_=
else if(nFileLength == -2) +G>\-tjSD
{ uHRsFlw
System.err.println("File is not access!"); !&@615Vtw
} 4 s9LB
else - " 9
{ ;*2Cm'8E
for(int i=0;i<nStartPos.length;i++) }4X0epPp;:
{ ]7c=PC
nStartPos = (long)(i*(nFileLength/nStartPos.length)); rEz^
} :NTO03F7v
for(int i=0;i<nEndPos.length-1;i++) `N8O"UcoBo
{ A?OQE9'
nEndPos = nStartPos[i+1]; &_8947
} }"%N4(Kd
nEndPos[nEndPos.length-1] = nFileLength; M&M6;Ph
} _
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} P@~yx#G
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//启动子线程 2y1Sne=<Kb
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; HTTCTR
for(int i=0;i<nStartPos.length;i++) %
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{ `){.+S(5C
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %E;'ln4h&,
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Qn2&nD%zi
nStartPos,nEndPos,i); buHJB*?9
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Q22 GIr
fileSplitterFetch.start(); +&H4m=D-#a
}
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), es0hm2HT3
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); sV*H`N')S
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", hOK8(U0
nEndPos = " + nFileLength); n~Lt\K:
// fileSplitterFetch[nPos.length-1].start(); ]T) 'Hb
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//等待子线程结束 7F.4Ga;
//int count = 0; %A0/1{(
//是否结束while循环 >^{yF~(
boolean breakWhile = false; j_j]"ew)
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while(!bStop) 9+!hg'9Qn
{ :[d9tm
write_nPos(); /G`]=@~
Utility.sleep(500); K)iF>y|{*q
breakWhile = true; WTiD[u
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for(int i=0;i<nStartPos.length;i++) hXya*#n#
{ 5#z1bu
if(!fileSplitterFetch.bDownOver) ZYNsHcTY
{ +aAc9'k
breakWhile = false; 0<*<$U
break; :Llb< MY2
} 3PF_H$`oJ
} V|R,!UND
if(breakWhile) (^>J&[=
break; B`sAk
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//count++; pTuS*MYz
//if(count>4) QTnP'5y
// siteStop(); ksm~<;td
} ,`sv1xwd
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System.err.println("文件下载结束!"); tQ601H>o
} eszG0Wu
catch(Exception e){e.printStackTrace ();} 43 :X,\~)
} 1xx}~|F?|
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//获得文件长度 tT._VK]o&R
public long getFileSize() Ew$C
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{ o#N+Y?O
int nFileLength = -1; @'|~v<<WZ
try{ 6wg^FD_Q
URL url = new URL(siteInfoBean.getSSiteURL()); f?)-}\[IR{
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); J9 I:Q<;
httpConnection.setRequestProperty("User-Agent","NetFox"); _','9|
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int responseCode=httpConnection.getResponseCode(); -ze J#B)C
if(responseCode>=400) R^e'}+Z
{ K.yb
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processErrorCode(responseCode); &,)&%Sg[
return -2; //-2 represent access is error IvNT6]6 P
} iJ|uvPCE
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String sHeader; fd9k?,zM
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for(int i=1;;i++) KG{St{uJ
{ lr$zHI7_`
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); N)Z?Z+}h
//Utility.log(in.readLine()); EBmt9S
sHeader=httpConnection.getHeaderFieldKey(i); nT)vNWT=
if(sHeader!=null) EEL,^3KR
{ B|X!>Q<g
if(sHeader.equals("Content-Length")) -%4,@
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{ {7pli{`
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); D3K8F@d
break; ~bpgSP"
} r@,2E6xn
} ]]Ufas9
else %N_%JK\{@
break; {f p[BF
} |gY^)9ei
} 8a"%0d#
catch(IOException e){e.printStackTrace ();} xe$_aBU
catch(Exception e){e.printStackTrace ();} ,"0:3+(8;
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Utility.log(nFileLength); ?Ss!e$jf
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return nFileLength; pmYHUj
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} QSf|nNT
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//保存下载信息(文件指针位置) f|oh.z_R
private void write_nPos() f`66h M[
{ <
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try{ p{dj~ &v
output = new DataOutputStream(new FileOutputStream(tmpFile)); GsM<2@?
output.writeInt(nStartPos.length); 0C,`h`
for(int i=0;i<nStartPos.length;i++) ,MIV=*
{ 7 Fsay+a
// output.writeLong(nPos); @9|hMo
output.writeLong(fileSplitterFetch.nStartPos); ]
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output.writeLong(fileSplitterFetch.nEndPos); |(^PS8wG
} f6"Z'{j
output.close(); |
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} IO:G1;[/2L
catch(IOException e){e.printStackTrace ();} Y\'}a+:@Ph
catch(Exception e){e.printStackTrace ();} +x}<IS8
} ?|Zx!z ($
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//读取保存的下载信息(文件指针位置) o#1 $q`Z
private void read_nPos() 1[-tD0{H
{ El"Q'(:/U
try{ '@P^0+B!(.
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); FHI ;)wn=
int nCount = input.readInt(); lsNd_7k
nStartPos = new long[nCount]; 3"\l u?-E
nEndPos = new long[nCount]; 8DaL,bi*.
for(int i=0;i<nStartPos.length;i++) \Y}8S/]
{ R@rBEW&
nStartPos = input.readLong(); @"H>niG
nEndPos = input.readLong(); QkC(uS
} @7n"yp*"
input.close(); IIx#2r
} L_iFt!
catch(IOException e){e.printStackTrace ();} Q&bM\;Ml
catch(Exception e){e.printStackTrace ();} y"wShAR
} Pk)1WK7E
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private void processErrorCode(int nErrorCode) geCM<]
{ 8}| (0mC
System.err.println("Error Code : " + nErrorCode); r]36zX v
} jrh43
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//停止文件下载 jo@J}`\Zt
public void siteStop() jW@Uo=I[
{ *-p}z@8
bStop = true; Mf``_=K
for(int i=0;i<nStartPos.length;i++) uu687|Pm
fileSplitterFetch.splitterStop(); H$4:lH&(
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} ,zY$8y]
} 'uEl~> l7
//负责部分文件的抓取 2jhxQL
**FileSplitterFetch.java 1|wL\I
*/ $E.I84UfX
package NetFox; N87B8rDl
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import java.io.*; h'F=YF$o
import java.net.*; !C:$?oU
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public class FileSplitterFetch extends Thread { J7p),[>I<
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String sURL; //File URL
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long nStartPos; //File Snippet Start Position JaGtsi9%.
long nEndPos; //File Snippet End Position E?0%Z&1h
int nThreadID; //Thread's ID |
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boolean bDownOver = false; //Downing is over XOS[No~
boolean bStop = false; //Stop identical kZ3ThIk%
FileAccessI fileAccessI = null; //File Access interface ,nm*q#R,0
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Dm<A
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{ n6a`;0f[R
this.sURL = sURL; kW&TJP+5*
this.nStartPos = nStart; [IhYh<i
this.nEndPos = nEnd; y
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nThreadID = id; 9qG6Pb
fileAccessI = new FileAccessI(sName,nStartPos);//定位 Jg|XH
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} emN*l]N
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public void run() ) hfpwdQ
{ oM`0y@QCf
while(nStartPos < nEndPos && !bStop) L/G6Fjg^
{ ~IN>3\j
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try{ Q$@I"V&G.
URL url = new URL(sURL); 9zy!Fq
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ZExlGC
httpConnection.setRequestProperty("User-Agent","NetFox"); TbW38\>.R
String sProperty = "bytes="+nStartPos+"-"; jtc]>]6i
httpConnection.setRequestProperty("RANGE",sProperty); NHZz _a=
Utility.log(sProperty); 9mTJ|sN:e
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InputStream input = httpConnection.getInputStream(); QB'aON\S
//logResponseHead(httpConnection); @2 fg~2M1
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byte[] b = new byte[1024]; 0.k7oB;f(@
int nRead; W|63Ir67
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop)
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{ fS78>*K
nStartPos += fileAccessI.write(b,0,nRead); Z}Ft:7
//if(nThreadID == 1) W v+?TEP
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); A{D];pE`
} Fy-t T]Q9
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Utility.log("Thread " + nThreadID + " is over!"); 8c^TT&
bDownOver = true; rCdu0 gYT
//nPos = fileAccessI.write (b,0,nRead); b2&0Hx
} vnZC,J `
catch(Exception e){e.printStackTrace ();} RdRp.pb8
} I(BQ34q
} YGCL2Y
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//打印回应的头信息 _.Uh)-yR
public void logResponseHead(HttpURLConnection con) %aVq+kC h
{ x-&@wMqkc
for(int i=1;;i++) 'kO!^6=4M
{ lp%pbx43s
String header=con.getHeaderFieldKey(i); ZeaA%y67U
if(header!=null) ~%kkeh\j
//responseHeaders.put(header,httpConnection.getHeaderField(header)); P:MT*ra*,
Utility.log(header+" : "+con.getHeaderField(header)); [%1CRk
else %2V? ,zY@
break; K^<BW(s
} +*/Zu`kzX
} z/@slT
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public void splitterStop() p]2128kqx
{ >V8-i`
bStop = true; )cMh0SGcM1
} jLHkOk5{:
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} Tqn@P
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/* Gm^U;u}=f
**FileAccess.java EaY?aAuS:
*//文件访问(定位,写) Zw
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package NetFox; U$D65B4=
import java.io.*; N]=q|D
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public class FileAccessI implements Serializable{ $1L>)S
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 1JG'%8}#8
RandomAccessFile oSavedFile; L2i_X@/
long nPos; Pw`8Wj
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public FileAccessI() throws IOException
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{ i#Bf"W{F
this("",0); `%9 uE(
} ShP^A"Do
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public FileAccessI(String sName,long nPos) throws IOException Gk&)08
{ FxWS V| Z
oSavedFile = new RandomAccessFile(sName,"rw"); ?_9
this.nPos = nPos; ,CcV/K
oSavedFile.seek(nPos); >7T'OC
} h_3E)jc
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public synchronized int write(byte[] b,int nStart,int nLen) :zke %Yx
{ qvKG-|j
int n = -1; w(3G&11N?
try{ K+K#+RBK
oSavedFile.write(b,nStart,nLen); k:#!zK}
n = nLen; [
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} #:U%mHT(_
catch(IOException e) )e=D(qd
{ Em
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e.printStackTrace (); ' ;FnIZ
} |tMWCA
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return n; @&3EJ1
} lc1(t:"[
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} G3vxjD<DMW
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/* aU "8{
**SiteInfoBean.java li'YDtMKCY
*/ JWhdMU
package NetFox; :tB1D@Cb6
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public class SiteInfoBean { gpvYb7Of0
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private String sSiteURL; //Site's URL GxI!{oi2
private String sFilePath; //Saved File's Path U}e!Wjrc
private String sFileName; //Saved File's Name PI:4m%[
private int nSplitter; //Count of Splited Downloading File 17[3/m8a
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public SiteInfoBean() )@l%
{//nSplitter的缺省值为5 BB!THj69a6
//default value of nSplitter is 5 Fg5kX
this("","","",5); 0$)>D==
} *ebSq)
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) p{Yv3dNl
{ F^t DL:
sSiteURL= sURL; Vvn2 Ep
sFilePath = sPath; 2~1SQ.Q<RY
sFileName = sName; Is)u }
this.nSplitter = nSpiltter; m '|bGV
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} F|o:W75
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public String getSSiteURL() 9Zt`u,;
{ 5j<mbt}
return sSiteURL; :uq\+(9
} ,]ma+(|
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public void setSSiteURL(String value) {W=%U|f
{ t7dt*D_YqK
sSiteURL = value; 4n!aW?%
} .9 on@S
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public String getSFilePath() <EB+1GFuI
{ [#<-ZC#T*
return sFilePath; @fZ,.2ar
} |mdVdD~go
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public void setSFilePath(String value) 7a=gH2]&
{ L%*!`TN
sFilePath = value; hYT0l$Ng
} szZr4y<8|1
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public String getSFileName() c)TPM/>(p
{ LEbB(x;@
return sFileName; UUYSFa%
}
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