/* H _zo1AW
**SiteFileFetch.java <+?7H\b
*/ #ML%ij 1
package NetFox; ~E2KZm
import java.io.*; 4\8+9b\9"
import java.net.*; H[U!%Z
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public class SiteFileFetch extends Thread { "hH.#5j
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SiteInfoBean siteInfoBean = null; //文件信息Bean (ROY?5
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long[] nStartPos; //开始位置 q_MG?re
long[] nEndPos; //结束位置 K;?m';z0
FileSplitterFetch[] fileSplitterFetch; //子线程对象 )<h*eS{
long nFileLength; //文件长度 U`, 6 * MS
boolean bFirst = true; //是否第一次取文件 r\'A
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boolean bStop = false; //停止标志 1mOh{:1u
File tmpFile; //文件下载的临时信息 g| I6'K!<
DataOutputStream output; //输出到文件的输出流 4;yKOQD|
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) eD?tLj
public SiteFileFetch(SiteInfoBean bean) throws IOException ^/I
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{ _E@2ZnD2
siteInfoBean = bean; K*LlW@
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); X86O lP)eX
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); XDOY`N^L
if(tmpFile.exists ()) Ezc?#<+7
{ L*xhGoC=
bFirst = false; `T@i. 'X
read_nPos(); "O3tq=Q
} S&Zm0Ku
else fI ?>+I5
{ %Nlt H/I
nStartPos = new long[bean.getNSplitter()]; GfoLae
nEndPos = new long[bean.getNSplitter()]; snE8 K}4
} t5\-v_mG=&
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} #+Ir>GU
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public void run() g:g\>@Umo
{ {f3YsM;]C
//获得文件长度 BO~0ON0
//分割文件 S 6@u@C
//实例FileSplitterFetch _hAcJ{Y
//启动FileSplitterFetch线程 )B"jF>9)[
//等待子线程返回 V,lOt4b
try{ ?pW`cFLDHF
if(bFirst) ##,a0s^
{ n4;.W#\
nFileLength = getFileSize(); W9 GxXPA
if(nFileLength == -1) I667Gz$j5
{ $v4.sl:x
System.err.println("File Length is not known!"); lk/n}bx
} :3v}kLO7|
else if(nFileLength == -2) ;#g"(
{ dI.WK@W'o
System.err.println("File is not access!"); uw>Ba %5
} "h{q#~s
else 7OcWC-<
{ ]l_\71
for(int i=0;i<nStartPos.length;i++) |GdUL%1hnC
{ hci6P>h<ia
nStartPos = (long)(i*(nFileLength/nStartPos.length)); Qf~vZtJ+J
} zqim R#u
for(int i=0;i<nEndPos.length-1;i++) u@Ih GME
{ dU&a{$ku[
nEndPos = nStartPos[i+1]; {2O1"|s ,
} g!g#]9j
nEndPos[nEndPos.length-1] = nFileLength; ~8'sBT
} }*M6x;t
} kvL=>
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//启动子线程 ;km`P|<U
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; %f&/E"M
for(int i=0;i<nStartPos.length;i++) >8~.wXyoC
{ 5bRJS70M
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), wT6"U$cV
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), VQc_|z_s
nStartPos,nEndPos,i);
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Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); VACQ+
fileSplitterFetch.start(); t|w_i-&b,
} iOd&BB6
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @x*c1%wg
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); C8J[Up
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", F|'>NL-=
nEndPos = " + nFileLength); Xpr?Kgz
// fileSplitterFetch[nPos.length-1].start(); {BP{C=p
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//等待子线程结束 LK{*sHi$
//int count = 0; iN bIp"W
//是否结束while循环 D#_3^Kiawj
boolean breakWhile = false; 2~Kgv|09
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while(!bStop) z 9vInf@M
{ J4k=A7^N
write_nPos(); dcDyK!zz"
Utility.sleep(500); h=W:^@G
breakWhile = true; prWk2_D;*
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for(int i=0;i<nStartPos.length;i++) {0[tNth'h
{ b:U$x20n$
if(!fileSplitterFetch.bDownOver) ]3D0R;
{ MU($|hwiL
breakWhile = false; EuEZ D+
break; Z_LFIz*c
} NpE*fR')
} NN%*b yK
if(breakWhile) zG }@0
break; ^ sOQi6pL
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q;B4WL}
//count++; a4mn*,
//if(count>4) kDEXN
// siteStop(); ny]?I
}
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System.err.println("文件下载结束!"); +G$4pt|=
} _mj,u64
catch(Exception e){e.printStackTrace ();} =T3<gGM
} 8Q.T g.
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//获得文件长度 /,BD#|
public long getFileSize() ]P9l jwR
{ AgWa{.`f:
int nFileLength = -1; s%vis{2
try{ vt/x
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URL url = new URL(siteInfoBean.getSSiteURL()); )1Y{Q Y}l
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 6`&a&%,O
httpConnection.setRequestProperty("User-Agent","NetFox"); eln)BW#
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int responseCode=httpConnection.getResponseCode(); R#s)r
if(responseCode>=400) =h-U
{ ]>W6
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processErrorCode(responseCode); T"(&b~m2b4
return -2; //-2 represent access is error kS %Ydy#:'
} 0XOp3
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String sHeader; J9..P&c\
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for(int i=1;;i++) #{6{TFx\
{ LHyB3V
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); S~<$Hy*kh
//Utility.log(in.readLine()); zZ:>do\2
sHeader=httpConnection.getHeaderFieldKey(i); *-#&K\
if(sHeader!=null) @Y?#Sl*
{ -fM1nH&
if(sHeader.equals("Content-Length")) *o]L|Vu
{ xn?a. 3b'
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); biL s+\C
break; vXev$x=w-
} mJ<=n?{Z
} O5!7'RZ
else |e=,oV"
break; pXtl
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} <c*FCblv
} x" 7H5<
catch(IOException e){e.printStackTrace ();} t Cw<Ip
catch(Exception e){e.printStackTrace ();} y3vdUauOn
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Utility.log(nFileLength); I"xo*}
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return nFileLength; !'Ak&j1:`
} n#mA/H;wV
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//保存下载信息(文件指针位置) t1]K<>g
private void write_nPos() k3~}7]O)
{ '_<{p3M
try{ K:J3Z5"
output = new DataOutputStream(new FileOutputStream(tmpFile)); n*o-Lo+Fe.
output.writeInt(nStartPos.length);
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for(int i=0;i<nStartPos.length;i++) <<UB ^v m
{ 7 G)ZN{'
// output.writeLong(nPos); j
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output.writeLong(fileSplitterFetch.nStartPos); {M3qLf~z#C
output.writeLong(fileSplitterFetch.nEndPos); /Jta^Bj
} O3;u G.:1
output.close(); hC:n5]K
} [m+2(I1
catch(IOException e){e.printStackTrace ();} Mc@e0
catch(Exception e){e.printStackTrace ();} ~Cbc<[}
} Y21g{$~Q{
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//读取保存的下载信息(文件指针位置) N%kt3vmQ_
private void read_nPos() C,wL0Yj[
{ #||}R[~P"
try{ Y1L[;)H n
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); !1rlN8w(qr
int nCount = input.readInt(); m&xW6!x
nStartPos = new long[nCount]; YD<:,|H
nEndPos = new long[nCount]; i1UiNJh86
for(int i=0;i<nStartPos.length;i++) -#7'r<I9@
{ 09|K>UC)v
nStartPos = input.readLong(); j_/>A=OD
nEndPos = input.readLong(); ^pxX]G]
} RW|`nL
input.close(); ;m0~L=w
} tG:25 T0
catch(IOException e){e.printStackTrace ();} tankR9(o
catch(Exception e){e.printStackTrace ();} S3F;(PDzy
} ?OId\'q
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private void processErrorCode(int nErrorCode) :=}BN
{ &[_g6OL
System.err.println("Error Code : " + nErrorCode); P !AEf#1
} d.3E[AJa(
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//停止文件下载 2 X.r%&!1M
public void siteStop() 1G"z<v
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{ g~ZvA(`
bStop = true; Q8C_9r/:N>
for(int i=0;i<nStartPos.length;i++) \O}E7-
fileSplitterFetch.splitterStop(); nv GF2(;l
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} [6 pD
} ={_C&57N1
//负责部分文件的抓取 1Y/s%L
**FileSplitterFetch.java ?@BTGUK"C
*/ dpJ_r>NI
package NetFox; 0f~C#/[t7
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import java.io.*; 0QFS
import java.net.*; "*($cQ$v
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public class FileSplitterFetch extends Thread { Hv!U|L
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String sURL; //File URL 6tB+J F
long nStartPos; //File Snippet Start Position R,gR;Aarw
long nEndPos; //File Snippet End Position t|a2;aq_
int nThreadID; //Thread's ID 3cFf#a #
boolean bDownOver = false; //Downing is over !5.8]v
boolean bStop = false; //Stop identical ,X#2\r<|
FileAccessI fileAccessI = null; //File Access interface {K <iih
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException t=|evOz]
{ y6LWx:
this.sURL = sURL; 5XO;N s
this.nStartPos = nStart; M|6A0m#Q
this.nEndPos = nEnd; qo p^;~
nThreadID = id; \wo?47+=
fileAccessI = new FileAccessI(sName,nStartPos);//定位 c0PIc^R(@
} 0C1pt5K
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public void run() "*m_> IU
{ /~}}"zx&
while(nStartPos < nEndPos && !bStop) *;1,5L
{ [p{#XwN
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try{ }3o|EXx=
URL url = new URL(sURL); u\ #"L
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 8JM&(Q%#
httpConnection.setRequestProperty("User-Agent","NetFox"); 5Y.vJz
String sProperty = "bytes="+nStartPos+"-"; }'""(,2
httpConnection.setRequestProperty("RANGE",sProperty); "^4_@ oo
Utility.log(sProperty); }vZ+A
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InputStream input = httpConnection.getInputStream(); '>&^zgr
//logResponseHead(httpConnection); ?!9)q.bW
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byte[] b = new byte[1024]; eAXc:222
int nRead; }2<r,
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ,a gc
{ \n{qsf:
nStartPos += fileAccessI.write(b,0,nRead); ,$+lFv3LE
//if(nThreadID == 1) 3 DD ML,
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); gXYI\.
} $>GgB`
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Utility.log("Thread " + nThreadID + " is over!"); U'8bdsF_
bDownOver = true; iMI lZ
//nPos = fileAccessI.write (b,0,nRead); fIj|4a+
} T^ w36}a
catch(Exception e){e.printStackTrace ();} PE~G=1x3
} I|>^1kr8w
} $UgA0]qn
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//打印回应的头信息 ])L
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public void logResponseHead(HttpURLConnection con) ux_Mrh'
{ I2 j}Am
for(int i=1;;i++) 7]9
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{ ^~G8?]w
String header=con.getHeaderFieldKey(i); 0}$Hi
if(header!=null) K@#(*."
//responseHeaders.put(header,httpConnection.getHeaderField(header)); twP,cyR
Utility.log(header+" : "+con.getHeaderField(header)); -sw
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else hJDi7P
break; c%&:6QniZ
} pV20oSJNt
} I
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public void splitterStop() {.QEc0-
{ &m|wH4\
bStop = true; ;\lW5ZX
} 1jN-4&
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} |
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/* O+?<h{"
**FileAccess.java &e;=cAXG
*//文件访问(定位,写) O)ME"@r@:
package NetFox; Xb{
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import java.io.*; }z\_;\7
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public class FileAccessI implements Serializable{ y($%;l
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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 $:
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RandomAccessFile oSavedFile; rb1`UG"h$
long nPos; u86"Y^d#
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public FileAccessI() throws IOException @6mBqcE'?
{ qEpi] =|
this("",0); qe!fk?T}
} WHjUR0NZ
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public FileAccessI(String sName,long nPos) throws IOException Gm(b/qDDe
{ |!"2fI
oSavedFile = new RandomAccessFile(sName,"rw"); l2l(_$@3
this.nPos = nPos; 6(G?MW.
oSavedFile.seek(nPos); Q($Z%1S
} 7.Z@Wr?
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public synchronized int write(byte[] b,int nStart,int nLen) d1U\ft:gV
{ 4dhvFGlW
int n = -1; ~ug=
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try{ {%IE xPJ
oSavedFile.write(b,nStart,nLen); ]p;FZ4-T
n = nLen; f|R"uW +
} b^p"|L
catch(IOException e) mExVYp h
{ (iRide
e.printStackTrace (); ppFe-wY
} R1& [S/
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return n; 7DIIx}A
} @DZB9DDR
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} C&6IU8l\
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/* qA!]E^0*Ke
**SiteInfoBean.java VMCLHpSfW
*/ T}4/0yR2
package NetFox; CYKr\DA
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public class SiteInfoBean { vmLxkjUm#
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private String sSiteURL; //Site's URL k<cgO[m
private String sFilePath; //Saved File's Path 0
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private String sFileName; //Saved File's Name aM{xdTYaU
private int nSplitter; //Count of Splited Downloading File 4WE6fJ2X
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public SiteInfoBean() @fa@s-wb
{//nSplitter的缺省值为5 $DZHQH
//default value of nSplitter is 5 |=EZ1<KzD
this("","","",5); **+e7k
} NHl|x4Zpw
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 11,!XD*"
{ ;/0 Q1-
sSiteURL= sURL; 5l,ZoB8
sFilePath = sPath; e5OsIVtjr
sFileName = sName; Uz7^1.-g4
this.nSplitter = nSpiltter; )LdyC`S\c
fd#jY}
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} nN~~cV
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public String getSSiteURL() !sRngXCXk?
{ sO5?aB&
return sSiteURL; ncSFj.}w]
} T2D<UhP
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public void setSSiteURL(String value) gh>>Ibf
{ jA(>sz
sSiteURL = value; 3&x-}y~sg
} }'OHE(s
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public String getSFilePath() 7 t?*
{ >I<r)w]
return sFilePath; 'SYo_!
} U#n#7G6fRp
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public void setSFilePath(String value) x'zBK0i
{ h b/]8mR
sFilePath = value; Jjl%R[mI
} g}f9dB,F
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public String getSFileName() yIb,,!y9{
{ j,d*?'X
return sFileName; ]hud4i~
} h8G5GRD
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public void setSFileName(String value) eh*6cQ.0
{ 4Iq'/r
sFileName = value; l/y]nw
} @=5qT]%U3J
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public int getNSplitter() ^+SkCO
{ 'O6]0l
return nSplitter; <e%F^#y_
} as+GbstN
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public void setNSplitter(int nCount) YHV-|UNF
{ Q{QYBh&
nSplitter = nCount; xw<OLWW
} GO! uwo:
} 8_H=^a>2
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qI
@^ ik[9^H
/* xKOq[d/8
**Utility.java `A/j1UWJ
*/ r'BAT3
package NetFox; /q\_&@
RE 3Z%;'
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public class Utility { 9^F2$+T[:
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public Utility() iF+RnWX\
{ V+wH?H=
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} G&eP5'B4i
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//线程睡眠 r!N]$lB
public static void sleep(int nSecond) 4YU/uQm
{ [LM^),J?
try{ d6 _C"r
Thread.sleep(nSecond); &ogt2<1W
} *HM?YhR
catch(Exception e) PHM:W%g:
{ GgFi9Ffj
e.printStackTrace (); MN=
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} E^ h=!RW{
} b 1^n KB
vC/[^
//日志 -[#n+`M
public static void log(String sMsg) q$ghLGz
{ iy5R5L2
System.err.println(sMsg); GtI6[ :1t
} R
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public static void log(int sMsg) J>S3sP
{ wod/&!)]A
System.err.println(sMsg); U_z2J(e~
} >X Qv?5
} {0jIY
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/* /nB'kg[h\
**TestMethod.java q7]>i!A
*/ @6xGJ,s
package NetFox; \MYU<6{u
@]
.VQ<X|0
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