/* 572{DC&T
**SiteFileFetch.java c> 0R_
*/ z50P*
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package NetFox; ^).
import java.io.*; ("KtJ
import java.net.*; `Kbf]"4q
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public class SiteFileFetch extends Thread { s[bQO1g;*
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SiteInfoBean siteInfoBean = null; //文件信息Bean i_(6}Y&
long[] nStartPos; //开始位置 5=&ME(fmV
long[] nEndPos; //结束位置 Z`<5SHQd
FileSplitterFetch[] fileSplitterFetch; //子线程对象 p1UYkmx[
long nFileLength; //文件长度 gA}?X
boolean bFirst = true; //是否第一次取文件 R-YNg
boolean bStop = false; //停止标志 $0Ys{m
File tmpFile; //文件下载的临时信息 A{p_I<
DataOutputStream output; //输出到文件的输出流 v{SZ(;
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) K7X*N
public SiteFileFetch(SiteInfoBean bean) throws IOException [}HS[($
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siteInfoBean = bean; lK_T%1Gz
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); {)(Mkm+d
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); V :/v
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if(tmpFile.exists ()) 6of9lO:
{ bFhZSk)
bFirst = false; xX|f{) <
read_nPos(); #(QS5J&Qq
} Ma4eu8
else G.r .Z0
{ w75Ro6y
nStartPos = new long[bean.getNSplitter()]; x_ t$*
nEndPos = new long[bean.getNSplitter()]; EU
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} M@JW/~p'
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} 0{
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public void run() jGoQXiX
{ Cn0s?3Fm
//获得文件长度 m&yHtnt
//分割文件 0"Euf41
//实例FileSplitterFetch [nG[ x|;|
//启动FileSplitterFetch线程 p( )LQT!
//等待子线程返回 zJ$U5r/u
try{ [kTckZv
if(bFirst) D<:zw/IRE
{ cY Qm8TR<
nFileLength = getFileSize(); Nv|0Z'M
if(nFileLength == -1) u1gD*4+
{ ;O|u`fAqT
System.err.println("File Length is not known!"); "&{.g1i9
} n1aOpz6`
else if(nFileLength == -2) 0dQ\Y]b
{ gLY15v4?
System.err.println("File is not access!"); .4l
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} ]q"y P0
else 4;@L#Pzt
{ <Ql2+ev6
for(int i=0;i<nStartPos.length;i++) _2)QL
{ ?o`:V|<v
nStartPos = (long)(i*(nFileLength/nStartPos.length)); R](cko=
} }#2(WHf=<
for(int i=0;i<nEndPos.length-1;i++) 6y "]2UgQk
{ 8C?E1fH\
nEndPos = nStartPos[i+1]; .|Yn[?(
} y2mSPLw
nEndPos[nEndPos.length-1] = nFileLength; F>5b[q6~4
} g[HuIn/
} ^go3F{;4i
oad /xbp@/
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//启动子线程 x6$3KDQm
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 8F'm#0
for(int i=0;i<nStartPos.length;i++) s}yN_D+V
{ TA8
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), OOXP1L
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), -%Ce
nStartPos,nEndPos,i); =diGuIB
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); l_8ibLyo
fileSplitterFetch.start(); $~j9{*]5
} \KS.A
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Gm3`/!r
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); :Rnwyj])
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", yhI;FNSf
nEndPos = " + nFileLength); ]rNxvFN*j
// fileSplitterFetch[nPos.length-1].start(); lgD%
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//等待子线程结束 -3y
//int count = 0; Oqt{ uTI~
//是否结束while循环 d(@ ov^e-
boolean breakWhile = false; 9Zmq7a
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while(!bStop) 3lEP:Jp
{ aT+w6{%Z
write_nPos(); /d/]#T[Z9
Utility.sleep(500); i2;,\FI@t%
breakWhile = true; Vg :''!4t2
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for(int i=0;i<nStartPos.length;i++) ,rF!o_7
{ G:wO1f6
if(!fileSplitterFetch.bDownOver) 3OY(L`
{ &}|`h8JA]K
breakWhile = false; J\p-5[E
break; B/^o$i
} H0yM`7[y
} \qlz<
if(breakWhile) sY?wQ:
break; c/:k|x
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//count++; fZLAZMrM
//if(count>4) 8<32(D{
// siteStop(); B-"F67 :
} +(z[8BJl
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System.err.println("文件下载结束!"); ~O!E &~
} dWe%6s;
catch(Exception e){e.printStackTrace ();} g!r)yzK
} PnB2a'(^@?
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//获得文件长度 <b\8<mTr
public long getFileSize() NS TO\36
{ AxF$7J(
int nFileLength = -1; oIMS >&
try{ (H:A|Lw
URL url = new URL(siteInfoBean.getSSiteURL()); fF=tT C
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 6D`.v@
httpConnection.setRequestProperty("User-Agent","NetFox"); Y=O-^fL
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int responseCode=httpConnection.getResponseCode(); B[
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if(responseCode>=400) Bn=YGEvz
{ ?'"BX
processErrorCode(responseCode); .3@Pz]\M#>
return -2; //-2 represent access is error 4d}n0b\d
} ~r'ApeI9
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String sHeader; IG2z3(j
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for(int i=1;;i++) zwP*7u$CH
{ \%%M >4c
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ;XlCd[J<
//Utility.log(in.readLine()); Ex@}x#3
sHeader=httpConnection.getHeaderFieldKey(i); Ir*{IVvej
if(sHeader!=null) q|IU+r:! 3
{ {a9.0N :4
if(sHeader.equals("Content-Length")) FFmXT/K"/j
{ #J8(*!I
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Z@$'fX?~9
break; [a}Idi`
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} 0tPwhJ
} a5d_= :S;
else m5HMtoU
break; p6)6Gcx
} >?G!>kw
} ]@}hyM[D;
catch(IOException e){e.printStackTrace ();} N+H[Y4c?F&
catch(Exception e){e.printStackTrace ();} X &G]ci
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Utility.log(nFileLength); FP0GE
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return nFileLength; qF`]}7"^
} S@~ReRew2
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//保存下载信息(文件指针位置) CWB<I
private void write_nPos() AUfcf*
{ r&:yZN
try{ U_E t
output = new DataOutputStream(new FileOutputStream(tmpFile)); 3hzz*9/n
output.writeInt(nStartPos.length); I).eQ8:
for(int i=0;i<nStartPos.length;i++) 3RcnoXX_
{ &Wk:>9]Jrb
// output.writeLong(nPos); 5>=4$!`
output.writeLong(fileSplitterFetch.nStartPos); L&]{GNw
output.writeLong(fileSplitterFetch.nEndPos); e ]2GAJLI
} _6]CT0
output.close(); 9'|_1Q.b^
} R?}%rP+^e
catch(IOException e){e.printStackTrace ();} V{\1qg{
catch(Exception e){e.printStackTrace ();} ~4] J'E >
} Vyc
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//读取保存的下载信息(文件指针位置) SaRn>n\
private void read_nPos() "tDB[?
{ 3u
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try{ e. E$Ej]w
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); H6KBXMYO
int nCount = input.readInt(); /L2.7`5
nStartPos = new long[nCount]; t+,2 p|B
nEndPos = new long[nCount]; 1p<*11
for(int i=0;i<nStartPos.length;i++) 'c
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{ F&lSRL+v
nStartPos = input.readLong(); 8zjJshE/
nEndPos = input.readLong(); zW[HGI6w
} muhu`
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input.close(); -f?,%6(1
} 1] .m4vC
catch(IOException e){e.printStackTrace ();} 3S%/>)k
catch(Exception e){e.printStackTrace ();} TpHzf3.I
} p>+Q6o9O
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private void processErrorCode(int nErrorCode) 'S9jMyZrZ
{ !?K#f?x<?
System.err.println("Error Code : " + nErrorCode); !|mzu1S
} 6;M{suG|
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//停止文件下载 o,$K=#Iv
public void siteStop() (SA^>r
{ ],'"iVh
bStop = true; 3XncEdy_
for(int i=0;i<nStartPos.length;i++) BJp~/H`vd
fileSplitterFetch.splitterStop(); %P C[-(Q
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} )d{fDwrx1
} w5t|C>
//负责部分文件的抓取 .B!
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**FileSplitterFetch.java {CX06BP
*/ e=_Ng
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package NetFox; tK6=F63e
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import java.io.*; L9!\\U
import java.net.*; DIkf#}
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public class FileSplitterFetch extends Thread { d9 l2mJzW
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String sURL; //File URL `1lGAKv
long nStartPos; //File Snippet Start Position uu/2C \n}
long nEndPos; //File Snippet End Position Ve xxdg
int nThreadID; //Thread's ID ( yB]$
boolean bDownOver = false; //Downing is over Qn;,OBk
boolean bStop = false; //Stop identical |:L}/onK
FileAccessI fileAccessI = null; //File Access interface <2N=cH'
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ^3QJv{)Q
{ {9cjitl
this.sURL = sURL; zT>BC}~.b
this.nStartPos = nStart; lx> ."rW
this.nEndPos = nEnd; lnK#q.]
nThreadID = id; .kB!',v\
fileAccessI = new FileAccessI(sName,nStartPos);//定位 /?V-
} Q9&H/]"v
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public void run() nW
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{ O0eM*~zI
while(nStartPos < nEndPos && !bStop) }:!X@C~
{ drbim8!q~
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try{ fT
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URL url = new URL(sURL); bas1(/|S
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); hUEA)c
httpConnection.setRequestProperty("User-Agent","NetFox"); yA';~V\V{>
String sProperty = "bytes="+nStartPos+"-"; wR"17z7[]
httpConnection.setRequestProperty("RANGE",sProperty); |<MSV KW
Utility.log(sProperty); F!-%v5.y
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InputStream input = httpConnection.getInputStream(); FbXur- et^
//logResponseHead(httpConnection); TYCjVxfu$
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byte[] b = new byte[1024]; bHQ) :W
int nRead; Ko|gH]B'
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) pm[+xM9PB
{ oqzWL~
nStartPos += fileAccessI.write(b,0,nRead); bV+2U
//if(nThreadID == 1) aj<r=
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); e%IbME]x
} jsP+,brO
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Utility.log("Thread " + nThreadID + " is over!"); ZKM@U?PK
bDownOver = true; #$}A$ sm
//nPos = fileAccessI.write (b,0,nRead); 5=8t<v1Bn
} ,hm&]
catch(Exception e){e.printStackTrace ();} R\]C;@J<
} lbC,*U^
} ~.tYYX<
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//打印回应的头信息 \s!x;nw[
public void logResponseHead(HttpURLConnection con) ? 51i0~O=
{ " ]OROJGa
for(int i=1;;i++) -aV(6i*n
{ `Jh<8~1
String header=con.getHeaderFieldKey(i); )JJF}m=
if(header!=null) "8~PfLJ+
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ,H1K sN
Utility.log(header+" : "+con.getHeaderField(header)); u'T-}95 V
else n~ 0MhE0H
break; =ADOf_n}
} @uanej0q7
} |*Oi:)qt
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public void splitterStop() M27H{}v
{ u4bVp+
bStop = true; qh6rMqq
} }0iHf'~DH*
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} JpxQS~VX
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/* ~Yc!~Rz
**FileAccess.java D4uAwmc
*//文件访问(定位,写) V^rL
package NetFox; 5=%KK3
import java.io.*; iio-RT?!
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public class FileAccessI implements Serializable{ {s@ 0<!
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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 X4Pm&ol
RandomAccessFile oSavedFile; lxr;AJ(
long nPos; j(k}NWPH
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public FileAccessI() throws IOException /Gn0|]KI
{ X{<taD2~
this("",0); ]Qa|9G,b
} E0yx
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public FileAccessI(String sName,long nPos) throws IOException _pDfPLlY&
{ dCo3 VF"u
oSavedFile = new RandomAccessFile(sName,"rw"); yH>C7M7t
this.nPos = nPos; wNn=JzP
oSavedFile.seek(nPos); pf%;*
} F^`+.G\
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public synchronized int write(byte[] b,int nStart,int nLen) e8#83|h
{ <XtE|LG
int n = -1; /+8VW;4|I
try{ KY%{'"'u
oSavedFile.write(b,nStart,nLen); s`0IyQXVU
n = nLen; W/}_ y8q
} +\)Y,@cw
catch(IOException e) vU]n0)<KB
{ @LSh=o+
e.printStackTrace (); u[oV
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} O.-n&U9
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return n; p\9}}t7n
} Yl:[b{Py
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} s9OW.i]zX
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/* vxLr034
**SiteInfoBean.java [HUK
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*/ %u_dxpx
package NetFox; kyt HOn#
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public class SiteInfoBean { ezCJq`b
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private String sSiteURL; //Site's URL #NYHwO<0-
private String sFilePath; //Saved File's Path ';c 6
private String sFileName; //Saved File's Name ?Zsh\^k.g
private int nSplitter; //Count of Splited Downloading File ^8J`*R8CL
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public SiteInfoBean() 5Pxx)F9]
{//nSplitter的缺省值为5 .Eb]}8/}E
//default value of nSplitter is 5 ~PpDrJ; Va
this("","","",5); <VutwtA
} v Y0ESc{
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) &/ED.K
{ RqP_^tB
sSiteURL= sURL; RyG6_G}
sFilePath = sPath; B]:|;d
sFileName = sName; 0NKgtH~+
this.nSplitter = nSpiltter; sR[!6[AA
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} k0#s{<I]E
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public String getSSiteURL() f 1+
{ VB#&`]rdo
return sSiteURL; R!
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} EP>Lh7E9n
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public void setSSiteURL(String value) t[|t0y8
{ <hiv8/)?
sSiteURL = value; BRskxyL&,
} "bF52lLu
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public String getSFilePath() 9==4T$nM[
{ L jTSu9I>
return sFilePath; .`5|NUhN
} UB~-$\.
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public void setSFilePath(String value) hf0(!C*
{ jC>#`gD
sFilePath = value; D GcpYA.7'
} qtozMa
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public String getSFileName() iLNUydiS
{ [ }Tb2|
return sFileName; r@qLG"[\c
} 9_iwikD
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public void setSFileName(String value) 6$=>ck P
{ 1'Q6l
sFileName = value; }2"W0ZdWD
} 2,`X@N`\
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EPH" 5$8
public int getNSplitter() .ml\z5
{ GD]epr%V
return nSplitter; adIrrK
} ;nQ=!
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public void setNSplitter(int nCount) @48!e-W
{ \G>C{v;
nSplitter = nCount; 1/w8'Kf'u
} Qkx*T9W
} IF|;;*Z8
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/* $w{d4" )
**Utility.java Q2r[^Z
*/ x[0hY0 ?[M
package NetFox; `4'=&c9
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public class Utility { JZ`h+fAt
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public Utility() J( XDwt
{ FI[BZZW
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} 5;" $X 1{
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//线程睡眠 {G x=QNd
public static void sleep(int nSecond) {TpbUj0
{ gFHBIN;u
try{ !(? 7V
Thread.sleep(nSecond); =dA]nM
} ~nmFZ]y
catch(Exception e) xcWR#z{z
{ 2{~`q
e.printStackTrace (); ~&T U
} iD|~$<9o
} nng|m
}lX$KuD
//日志 OHBCanZZ,
public static void log(String sMsg) [niFJIsc
{ R3_OCM_*
System.err.println(sMsg); [.xY>\e
} qm><}N7f
s) U1U6O
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public static void log(int sMsg) 4Xa]yA =
{ :FS5BT$=
System.err.println(sMsg);
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} fb `x1Q
} m=@xZw<
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/* n5UUoBv
**TestMethod.java /fb}]e]N
*/ mJ<`/p?:
package NetFox; f<