/* lOB*M!8
**SiteFileFetch.java PxE 0b0eo
*/ 8$9Q=M
package NetFox; M uz+j.0
import java.io.*; nIc:<w]
import java.net.*; ~0/tU#&
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public class SiteFileFetch extends Thread { nwSujD
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SiteInfoBean siteInfoBean = null; //文件信息Bean 3>vSKh1z
long[] nStartPos; //开始位置 B6qM0QW
long[] nEndPos; //结束位置 dAg<BK/
FileSplitterFetch[] fileSplitterFetch; //子线程对象 V}=%/OY?
long nFileLength; //文件长度 T .#cd1b
boolean bFirst = true; //是否第一次取文件 *XN|ZGl/
boolean bStop = false; //停止标志 [=/Yo1:v
File tmpFile; //文件下载的临时信息 9NzK1V0X
DataOutputStream output; //输出到文件的输出流 ;6+e !h'1
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Qg9*mlm`
public SiteFileFetch(SiteInfoBean bean) throws IOException 3%HF" $Gg
{ ,zXP,(x
siteInfoBean = bean; q-?
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); PH!^ww6
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); (S<Z@y+d
if(tmpFile.exists ()) kD"BsL*6!
{ Qk`ykTS!
bFirst = false; "^gV.
read_nPos(); hv.33l
} $+'bRUo
else
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{ ayGYVYi
nStartPos = new long[bean.getNSplitter()]; GTYCNi66
nEndPos = new long[bean.getNSplitter()]; Lvco9
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} o4Ny9s
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} (g(.gN]
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public void run() s<#["K*_
{ x{'3eJ^8
//获得文件长度 BeR7LV
//分割文件 Aho zrroV
//实例FileSplitterFetch ,?k0~fuG6
//启动FileSplitterFetch线程 m%$GiNs}
//等待子线程返回 0;J#".(KQ
try{ 8VWkUsOoI
if(bFirst) "K Or)QD/
{ S{uKm1a
nFileLength = getFileSize(); ` @PHV
if(nFileLength == -1) 40?xu#"
{ <q}w, XU
System.err.println("File Length is not known!"); PJ$C$G
} !\'NBq,
else if(nFileLength == -2) #saK8; tp
{ ='rSB.$Ctk
System.err.println("File is not access!"); 7A,QA5G]C
} n8K FP
else S`w_q=-^8
{ h=a-~= 8
for(int i=0;i<nStartPos.length;i++) E:7R>.g
{ mQ$a^28=qR
nStartPos = (long)(i*(nFileLength/nStartPos.length)); l^~E+F~
} \jR('5DcB
for(int i=0;i<nEndPos.length-1;i++) r0Cc0TMdj
{ r}>q*yx:
nEndPos = nStartPos[i+1]; Tr\6AN?o
} BdMmeM2h
nEndPos[nEndPos.length-1] = nFileLength; V
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} 'c[|\M!u
} DTx!# [
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//启动子线程 O>vbAIu
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; tMy<MO)Ei
for(int i=0;i<nStartPos.length;i++) U07G&?/
{ tJ qd
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), AiDV4lHr
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), =cP7"\
nStartPos,nEndPos,i); BH;7CK=7R
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ~ZxFL$<'3
fileSplitterFetch.start(); )8,) &F
} Sd9%tO9mf
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (>)f#t[9J
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 7^hwRZJ{
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Y%GIKtP
nEndPos = " + nFileLength); %C1*`"Jb&
// fileSplitterFetch[nPos.length-1].start(); .dE2,9{Z
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//等待子线程结束 {hRM=f7
//int count = 0; E0lro+'lS
//是否结束while循环 rzk-_AFR
boolean breakWhile = false; {y\5 9
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while(!bStop) =QG0:z)K<v
{ 2D vKW%;
write_nPos(); 'P`L?/_3
Utility.sleep(500); wI{ED
breakWhile = true; 6@X j
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for(int i=0;i<nStartPos.length;i++) +\D?H.P
{ "Vw;y+F}
if(!fileSplitterFetch.bDownOver) BIK^<_?+ZU
{ ;zpSyyp@
breakWhile = false; 13f@Ox$
break; _?m%i]~o
} 7[/1uI9U8K
} '*d);{D8
if(breakWhile) CHGV1X,
break; xlHC?d0}
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//count++; ]ysEj3
//if(count>4) jWE?$r"
// siteStop(); sfUKH;xC
} >P_/a,O8
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System.err.println("文件下载结束!"); ? 3'O
} W&'[Xj
catch(Exception e){e.printStackTrace ();} Up*.z\|'y
} MmL)CT
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//获得文件长度 up^D9(y\
public long getFileSize() S+mM S
{ P)k!#*
int nFileLength = -1; *y@Xm~ld
try{ sSdnH_;&
URL url = new URL(siteInfoBean.getSSiteURL()); c
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HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); A])+Pe
httpConnection.setRequestProperty("User-Agent","NetFox");
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int responseCode=httpConnection.getResponseCode(); g q`S`
if(responseCode>=400) 'G|M_ e
{ BJ$\Mb##3@
processErrorCode(responseCode); %@Ow.7zh
return -2; //-2 represent access is error +T,Yf/^Fn
} .kT}E5
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String sHeader; `(Eiu$h6V-
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for(int i=1;;i++) ]Lz:oV^%
{ 6.(L8.jv
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 4IUdlb
//Utility.log(in.readLine()); %+F%C=GqI
sHeader=httpConnection.getHeaderFieldKey(i); Yfa` }hQ
if(sHeader!=null) +yO^,{8SE
{ dF#`_!4pbf
if(sHeader.equals("Content-Length")) BJ,D1E
{ grWmF3c#
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); w /l\p3n
break; k&dLg5O
} !STa}wl
} %jc"s\
else ROWrkJI>i
break; E{B8+T:3
} _=*ph0nu
} O_bgrXg6x
catch(IOException e){e.printStackTrace ();} Dqz9NB
catch(Exception e){e.printStackTrace ();} *F)+- BB
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Utility.log(nFileLength); vk>EFm8l
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return nFileLength; /jB0
} >r8$vQ Gj
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//保存下载信息(文件指针位置) 6vL+qOd x
private void write_nPos() CG397Y^
{ ]\ DIJ>JZ
try{ M>m+VsJV
output = new DataOutputStream(new FileOutputStream(tmpFile)); NBaXfWh
output.writeInt(nStartPos.length); Ak=|wY{
for(int i=0;i<nStartPos.length;i++) X`'
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{ wrJ:jTh
// output.writeLong(nPos); <JkmJ/X
output.writeLong(fileSplitterFetch.nStartPos); PS\n0
output.writeLong(fileSplitterFetch.nEndPos); 8Vf]K}d
} 2n3g!M6~
output.close(); [e.@Yx_}
} "eOFp\vPr
catch(IOException e){e.printStackTrace ();} G~$[(Fhk
catch(Exception e){e.printStackTrace ();} j7u\.xu9
} E!SxO~
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//读取保存的下载信息(文件指针位置) \[MQJX,dn
private void read_nPos() g$a
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{ WJJwhr
try{ L2P#5B!S
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); *s[bq;$
int nCount = input.readInt(); Sb,lY<=
nStartPos = new long[nCount]; bxFDB^
nEndPos = new long[nCount]; 2J0N]`|)
for(int i=0;i<nStartPos.length;i++) *$/!.e
{ CgxGvM4
nStartPos = input.readLong(); UX!)\5-
nEndPos = input.readLong(); g*a|QBj%
} cE SSSH!m
input.close(); ckCb)r_
} oe,37xa4
catch(IOException e){e.printStackTrace ();} 2Ysl|xRo
catch(Exception e){e.printStackTrace ();} ZBcT@hxm
} yD\[`!sWk
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private void processErrorCode(int nErrorCode) 6O9?":3;
{ q(iM=IeiN
System.err.println("Error Code : " + nErrorCode); ]%I}hjJ
} Oqy&V&-C
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//停止文件下载 ZlEH3-Zv
public void siteStop() rh+2
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{ L,PD4H"8
bStop = true; lemE/(`a_
for(int i=0;i<nStartPos.length;i++) KBSO^<7
fileSplitterFetch.splitterStop(); 9EI Oa/*
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} R[Y{pT,AY
} L-V+ `![{
//负责部分文件的抓取 cq-UVk"Gl
**FileSplitterFetch.java ujH ^ ML
*/ G
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package NetFox; T#:n7$M|?A
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import java.io.*; v5Qp[O_
import java.net.*; #G`UR
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public class FileSplitterFetch extends Thread { c(5r
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String sURL; //File URL @Fs2J_v
long nStartPos; //File Snippet Start Position n$z+g>~N
long nEndPos; //File Snippet End Position BL?Bl&p(
int nThreadID; //Thread's ID s+RSAyU
boolean bDownOver = false; //Downing is over M+ljg&fy
boolean bStop = false; //Stop identical p%?m|(4f
FileAccessI fileAccessI = null; //File Access interface co-dq\P
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException F9\T<
{ m.0:R
this.sURL = sURL; fO'"UI
this.nStartPos = nStart; PW)Gd +y
this.nEndPos = nEnd; GR ^d/
nThreadID = id; \cKY{(E
fileAccessI = new FileAccessI(sName,nStartPos);//定位 wr+r J
} "S ~(|G
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public void run() IA&NMf;{
{ 0S}ogU[k
while(nStartPos < nEndPos && !bStop) :K]&rGi,
{ <{xU.zp'
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try{ wx2EMr
URL url = new URL(sURL); ~[H+,+XLY+
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); {~u#.(
httpConnection.setRequestProperty("User-Agent","NetFox"); 0%f}w0]:
String sProperty = "bytes="+nStartPos+"-"; 7>sNjOt@M
httpConnection.setRequestProperty("RANGE",sProperty); rm"C|T4:V
Utility.log(sProperty); o{n)w6P{R,
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InputStream input = httpConnection.getInputStream(); qzbpLV|
//logResponseHead(httpConnection); :\sz`p?EC
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byte[] b = new byte[1024]; aUVJ\;V
int nRead; ^}>Ie03m50
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) v0|[w2Q2
{ Dx1 w I
nStartPos += fileAccessI.write(b,0,nRead); F
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//if(nThreadID == 1) (^)" qsB
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); B<}0r4T}
} ~8#Ku,vEy
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Utility.log("Thread " + nThreadID + " is over!"); vSf ?o\O
bDownOver = true; _5%NG 3c
//nPos = fileAccessI.write (b,0,nRead); F4T}HY>nZ
} w4UaWT1J
catch(Exception e){e.printStackTrace ();}
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} U.mVz,k3
} I0v$3BQ4
.>A`FqV$~+
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//打印回应的头信息 +dB/SC-^U
public void logResponseHead(HttpURLConnection con) =!pfgE
{ g~#HiBgWq[
for(int i=1;;i++) ZM$}Xy\9
{ FR%u1fi
String header=con.getHeaderFieldKey(i); PRo;NE
if(header!=null) A"$UU6Z4
//responseHeaders.put(header,httpConnection.getHeaderField(header)); Aqp$JM
>
Utility.log(header+" : "+con.getHeaderField(header)); FdZG%N>Z
else 9f+S-!
break; Ta0Ln
} 4PsJs<u
} 6.|Qyk*
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public void splitterStop() h_{//W[
{ nm3/-Q},
bStop = true; xdqiogu e
} n@"h^-
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} #4Z]/D2G
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/* K;fRDE){
**FileAccess.java UCv9G/$
*//文件访问(定位,写) XX@@tzN
package NetFox; NjL^FqA[
import java.io.*; `fA|])3T
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public class FileAccessI implements Serializable{ GNIZHyT(O
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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 >^!qxb-
RandomAccessFile oSavedFile; x<-n}VK\
long nPos;
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public FileAccessI() throws IOException _r6aLm2n
{ S9'8rn!_
this("",0); $cUTe
} /N'|Vs,X
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public FileAccessI(String sName,long nPos) throws IOException ZV?~~_9
{ ==i:*
oSavedFile = new RandomAccessFile(sName,"rw"); fNkN
this.nPos = nPos; V6.w=6:`X
oSavedFile.seek(nPos); Mr8r(LGY
} ls<7Qe"a
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j![ ; ;
public synchronized int write(byte[] b,int nStart,int nLen) 1E]|>)$
{ X 9lh@`3
int n = -1; f T&>L
try{ RkW)B^#
oSavedFile.write(b,nStart,nLen); /M.@dW7
w
n = nLen; p%_m!
} Ul41RNy)
catch(IOException e) $d[ xSwang
{ Ki"o0u
e.printStackTrace (); BWd{xP y
} PN$vBFjm
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return n; e=]>TeqG0
} ]I|3v]6qR
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} XehpW}2\
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/* FK8GBkQ!
**SiteInfoBean.java b)5z'zQu
*/ -@wnQ?
package NetFox; 5tIM@,.I/
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public class SiteInfoBean { x9c/;Q&m
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private String sSiteURL; //Site's URL N0D)d
private String sFilePath; //Saved File's Path <}^W9>u<
private String sFileName; //Saved File's Name C#y[UM5\k;
private int nSplitter; //Count of Splited Downloading File RuW62QSq
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public SiteInfoBean() {APsi7HYBr
{//nSplitter的缺省值为5 Q|^TR__
//default value of nSplitter is 5 7d7"^M
this("","","",5); 1b6ox6
} ~m]sJpW<"
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) yWs_Z6 b
{ ~"Pu6-\VT
sSiteURL= sURL; e@-"B9~
sFilePath = sPath; ae)0Yu`*G7
sFileName = sName; ?Q~6\xA
this.nSplitter = nSpiltter; Pmj]"7Vd[
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} >UP{=`
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public String getSSiteURL() Dn6 k,nVh
{ s[V$fvW
return sSiteURL; <By6%<JTn
} p8>.Q/4
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public void setSSiteURL(String value) MZ(TST"
{ q+MV@8w
sSiteURL = value; M>mk=-l
} 'wo[iNy[
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public String getSFilePath() Jl"),;Od
{ blwdcdh
return sFilePath; o8:K6y
} c
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public void setSFilePath(String value) v;E7UL
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{ )C
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sFilePath = value; 3~e"CKD>
} G;n'c7BV
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public String getSFileName() N0@&eX|$i4
{ 4T-9F
return sFileName; >H@
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} %!r>]M <
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public void setSFileName(String value) FuOP+r!H
{ KzQ\A!qG
sFileName = value; _YXk,ME!Q
} ?|8QL9Q"|
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public int getNSplitter() vG(Gs=.U
{ {iP^51fy
return nSplitter; RVFQ!0
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} })V9d
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public void setNSplitter(int nCount) la ~T)U7
{ U!:Q|':=h
nSplitter = nCount; D6iHkDTg
} 7$(>Z^ Em
} 8K!
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/* &qki
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**Utility.java Z!TLWX"
*/ `~Eo;'( +^
package NetFox; Le9^,B@Pb
m*L*# ZBS
* P_
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public class Utility { DLYk#d: q?
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public Utility() QE&rpF7l{
{ PaF`dnJ
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} tBgB>-h(
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//线程睡眠 od{b]HvgS
public static void sleep(int nSecond) y]5O45E0
{ ;BV1E|j
try{ j]EeL=H<P
Thread.sleep(nSecond); a3i4eGT -
} 2R&msdF
catch(Exception e) }
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{ 5qkG~YO-
e.printStackTrace (); _94|^
} /dpEL9K
} /,'D4s:Gg
^)&d7cSc
//日志 75~>[JM
public static void log(String sMsg) ffK A
{ x^kV;^ I
System.err.println(sMsg); 5V&3m@d0aq
} *TY?*H
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public static void log(int sMsg) c&.>SR')
{ V`Z-m-V~1
System.err.println(sMsg); *.wX9g9\
} K
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} umrfA
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