/* 9Y- Sqk+
**SiteFileFetch.java AiykIER/
*/ ny|ni\6
package NetFox; 5*{U!${a
import java.io.*; Xlp u_H|
import java.net.*; [2gK^o&t
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public class SiteFileFetch extends Thread { :seo0w]
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SiteInfoBean siteInfoBean = null; //文件信息Bean {j+w|;dZF
long[] nStartPos; //开始位置 p\wE})mu
long[] nEndPos; //结束位置 # nwEF QA
FileSplitterFetch[] fileSplitterFetch; //子线程对象 n|Iy
long nFileLength; //文件长度 lV:R8^d
boolean bFirst = true; //是否第一次取文件 %'nM!7w@I
boolean bStop = false; //停止标志 ^<'5 V)
File tmpFile; //文件下载的临时信息 Y'&A~/Adf
DataOutputStream output; //输出到文件的输出流 + O=wKsGD
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) #Sr_PEo
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public SiteFileFetch(SiteInfoBean bean) throws IOException -LJbx<'
{ I#zrz3WU
siteInfoBean = bean; TggM/@k
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); IExo#\0'6
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); SEq_37
if(tmpFile.exists ()) :D8V*F6P
{ ='q:Io?T
bFirst = false; 3xWeN#T0
read_nPos();
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} >t&Frw/Bl
else `$\g8Mo
{ \Y_2Z/
nStartPos = new long[bean.getNSplitter()]; FN NEh
nEndPos = new long[bean.getNSplitter()]; 1@6dHFA`o
}
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} cu5Yvp
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public void run() (ec?_N0=
{ abh='5H|^|
//获得文件长度 7"Sw))H|
//分割文件 <UOx >=h
//实例FileSplitterFetch uIvy1h9m
//启动FileSplitterFetch线程 0tv"tA;
//等待子线程返回 z 0]K:YV_
try{ 6e3s
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if(bFirst) >KmOTM<{
{ Lg0Vn&k
nFileLength = getFileSize(); tT'*Uu5
if(nFileLength == -1) T$5u+4>"
{ ?2zVWZ
System.err.println("File Length is not known!"); \ce (/I
} `[p*qsp_
else if(nFileLength == -2) _]a8lr+_-
{ ;,![Lar5L
System.err.println("File is not access!"); T&c0j(
} /L\]t
else (xf_
{ 5@ecZ2`)+h
for(int i=0;i<nStartPos.length;i++) "K
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{ u@tJu'X
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 6:O3>'n
} !
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for(int i=0;i<nEndPos.length-1;i++) Fk@A;22N
{ i_Dv+^&zV
nEndPos = nStartPos[i+1]; /. GHR
} FtXd6)_S
nEndPos[nEndPos.length-1] = nFileLength; }CnqJ@>C5
} 23 j{bK
} SQhk)S
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//启动子线程 .}n,
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 86NAa6BW
for(int i=0;i<nStartPos.length;i++) W iql c
{ 7\m.xWX e
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), sVtxh]
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), <`,pyvR Kv
nStartPos,nEndPos,i); 4A^=4"BCV
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); !Z[dK{f"
fileSplitterFetch.start(); V9[-# Ti
}
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~SgW+sDFu
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); tgXIj5z
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", {j
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nEndPos = " + nFileLength); i1k(3:ay<
// fileSplitterFetch[nPos.length-1].start(); yQ5&S]Xk$$
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//等待子线程结束 ?tS=rqc8oW
//int count = 0; :9un6A9JS
//是否结束while循环 Y[Jt+p]
boolean breakWhile = false; |g<1n
}#}IR5`=E
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while(!bStop) Tap=K|b ]
{
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write_nPos(); VP[-BK[
Utility.sleep(500); XDs )
breakWhile = true; ;AMbo`YK[
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for(int i=0;i<nStartPos.length;i++) MDn+K#p
{ 4Kjrk7GAx
if(!fileSplitterFetch.bDownOver) vFz%#zk>
{ e=K2]Y Q{
breakWhile = false; V\Oe ]w
break; ^%l~|w
} +]Ca_`
} Y2709LWmP
if(breakWhile) par|j]
break; KNT(lA0s
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//count++; v
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//if(count>4) 7L~LpB
// siteStop(); > w:+nG/r
} fDyFkhc
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System.err.println("文件下载结束!"); @V{s'V
}
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catch(Exception e){e.printStackTrace ();} Y@x }b{3
} HDqPqrWm
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//获得文件长度 KWtLrZ(j
public long getFileSize() rmpx8CY"
{ k8fvg4
int nFileLength = -1; o=i)s2
try{ %gj's-!!
URL url = new URL(siteInfoBean.getSSiteURL()); (2J_Y*N~>
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); n';"c;Ye)
httpConnection.setRequestProperty("User-Agent","NetFox"); +~,
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int responseCode=httpConnection.getResponseCode(); {!5"Y(>X
if(responseCode>=400) XVwaX2=L
{ ga0>J_
processErrorCode(responseCode); 7^$PauAv
return -2; //-2 represent access is error XrR@cDNx{
}
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String sHeader; tY$
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for(int i=1;;i++) xK4b(KJj
{ Co6ghH7T
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); weQC9e~d{-
//Utility.log(in.readLine()); I)$` @.
sHeader=httpConnection.getHeaderFieldKey(i); e ='bc7$
if(sHeader!=null) lK;/97Ze
{ V[D[MZ
if(sHeader.equals("Content-Length")) BM bT:)%
{ x`N_tWZ
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); jR~2mf!h*e
break; S"?py=7
} p x;X}Cd
} A:Y]<jt
else \+OP!`
break; \m @8$MK
} b|U48j1A
} z9mmZqhK\
catch(IOException e){e.printStackTrace ();} \(UEjlo
catch(Exception e){e.printStackTrace ();} fdr.'aMf%
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Utility.log(nFileLength); 'Y23U7 n0B
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return nFileLength; 9/Q_Jv-Q
} Bkg/A;H
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//保存下载信息(文件指针位置) $Yfm>4
private void write_nPos() `q Sfo`
{ }\5^$[p
try{ vn;_|NeSf
output = new DataOutputStream(new FileOutputStream(tmpFile)); G=4Da~<ij
output.writeInt(nStartPos.length); @}@`lv65}
for(int i=0;i<nStartPos.length;i++) p"^^9'`=
{ R03V+t=
// output.writeLong(nPos); Bvx%|:R
output.writeLong(fileSplitterFetch.nStartPos); 5=CLR
output.writeLong(fileSplitterFetch.nEndPos); nA8]/r1k
} YpQ/ )fSEV
output.close(); dR2#n
} dtJaQ`
catch(IOException e){e.printStackTrace ();} X$,#OR
catch(Exception e){e.printStackTrace ();} 2YvhzL[um
} 7aTo!T
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//读取保存的下载信息(文件指针位置) 9:0JWW^so
private void read_nPos() yO
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{ e9r#r~Qq|
try{ 2GRh8G&5
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); uiq)?XUKv
int nCount = input.readInt(); i|u3 Qt5
nStartPos = new long[nCount]; .v[8ie
nEndPos = new long[nCount]; I^ W
for(int i=0;i<nStartPos.length;i++) @DK,ka(
{ )mO|1IDTN
nStartPos = input.readLong(); b{H&%Jx)
nEndPos = input.readLong(); kE QT[Lo
} mNw|S*C
input.close(); r.M8#YL
} CFD& -tED&
catch(IOException e){e.printStackTrace ();} }x% ;y]S
catch(Exception e){e.printStackTrace ();} L+Q"z*W
} +=I_3Wtth
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private void processErrorCode(int nErrorCode) +) 2c\1
{ * bmdY=#7
System.err.println("Error Code : " + nErrorCode); Tysh~C|1
} 4&/u1u0
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//停止文件下载 $5nOi aQL
public void siteStop()
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{ X~abn7_
bStop = true; |x3(Tf
for(int i=0;i<nStartPos.length;i++) aE.T%xR
fileSplitterFetch.splitterStop(); ?b, eZ+t
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} K'N`rx.7
} |;{^Mci%
//负责部分文件的抓取 c>d+q9M
**FileSplitterFetch.java `.nkC_d
*/ j eMh
package NetFox; #:L|-_=a
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import java.io.*; sAS\-c'6
import java.net.*; SiHZco
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public class FileSplitterFetch extends Thread { P7d" E
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String sURL; //File URL 1R9hA7y&,/
long nStartPos; //File Snippet Start Position LoUi Yf
long nEndPos; //File Snippet End Position C)`ZI8
int nThreadID; //Thread's ID |mV*HdqU
boolean bDownOver = false; //Downing is over s&Y~48{
boolean bStop = false; //Stop identical ;hNnF&l
FileAccessI fileAccessI = null; //File Access interface k7)H%31;
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException c ;`
{ l/;OC
this.sURL = sURL; oH!sJ&"#_
this.nStartPos = nStart; 4W}8?&T
this.nEndPos = nEnd; tUv@4<~,/
nThreadID = id; Y[Us"K`
fileAccessI = new FileAccessI(sName,nStartPos);//定位 "v4;m\g&:
} 3nf+imAF
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public void run() 1eI>Yy>}
{ *\m
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while(nStartPos < nEndPos && !bStop) h;f5@#F
{ iyrUY
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try{ y!GjC]/
URL url = new URL(sURL); \\
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HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Q?n} ~(%&
httpConnection.setRequestProperty("User-Agent","NetFox"); -cNh5~p=
String sProperty = "bytes="+nStartPos+"-"; S(mJ;C
httpConnection.setRequestProperty("RANGE",sProperty); Ta?#o
Utility.log(sProperty); 5 +:b#B
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InputStream input = httpConnection.getInputStream(); j(6:
//logResponseHead(httpConnection); P
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byte[] b = new byte[1024]; BIDmZU9tL
int nRead; ^"K
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) yAR''>
{ 0}hN/2}&
nStartPos += fileAccessI.write(b,0,nRead); jfZ(5Qu3.H
//if(nThreadID == 1) ?/)Mt(p
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); :h0as!2@dp
} D|9C|q
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Utility.log("Thread " + nThreadID + " is over!"); JT&CJ&#[h
bDownOver = true; rX%#Q\0h
//nPos = fileAccessI.write (b,0,nRead); -% PUY(
} =A9>Ej/
catch(Exception e){e.printStackTrace ();} *aS|4M-
} 6 +^V
} *RUB`tEL
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//打印回应的头信息 a)PBC{I
public void logResponseHead(HttpURLConnection con) )-|A|1Uo
{ n'7 3DApW
for(int i=1;;i++) ;SeDxyKG
{ @)m[:n
String header=con.getHeaderFieldKey(i); UP 1Y3
if(header!=null) W"AWhi{h
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 2:MB u5**
Utility.log(header+" : "+con.getHeaderField(header)); 3X*;.'#Z
else f(
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break; fo&q/;l\
} X_+`7yCi"x
} .\X/o!xC
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public void splitterStop() 9c9-1iS
{ vLDMa>
bStop = true; 2V/A%
} ;gy_Q f2U
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} a+)Yk8%KY
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/* ?`AzgM[I
**FileAccess.java tz
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*//文件访问(定位,写) }fZT$'*;
package NetFox; @jN!j*Y H
import java.io.*; yopEqO
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public class FileAccessI implements Serializable{ N'Ywn}!js
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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 MG[?C2KA/
RandomAccessFile oSavedFile; z
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long nPos; 99G/(Z}
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public FileAccessI() throws IOException 8<0H(lj7_
{ E,shTh%&~
this("",0); \yNjsG@,
} y7wy9+>l
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public FileAccessI(String sName,long nPos) throws IOException :IV4]`
{ {a `kPfP
oSavedFile = new RandomAccessFile(sName,"rw"); :m_0WT
this.nPos = nPos; 6S])IA&VJ
oSavedFile.seek(nPos); Xp1xhb*^
} Zg5@l3w
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public synchronized int write(byte[] b,int nStart,int nLen) [esjR`u
{ ETV|;>v
int n = -1; )K -@{v^|
try{ {F6hx9?
oSavedFile.write(b,nStart,nLen); TGdD7n&Ehh
n = nLen; (NOAHV0H
} (-(,~E
catch(IOException e) 6|X
{ DGO_fR5L
e.printStackTrace (); p+snBaAo}
} ^>h
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return n; 0fxA*]h
}
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} RQy|W}d_
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/* 3*CF !Y%
**SiteInfoBean.java =\J^_g4-l
*/ =:P9 $
package NetFox; @Rig@
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public class SiteInfoBean { #AyM!
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private String sSiteURL; //Site's URL !vr">@}K
private String sFilePath; //Saved File's Path hx+a.N
private String sFileName; //Saved File's Name kMo;<Z
private int nSplitter; //Count of Splited Downloading File U;i:k%Bzy
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public SiteInfoBean() @Q!f^
{//nSplitter的缺省值为5 {O5;V/00}
//default value of nSplitter is 5 f6PXcV
this("","","",5); 64#~ p)
} M cNj TD
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ^.mQ~F
{ <6mXlK3N0
sSiteURL= sURL;
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sFilePath = sPath; 1'"o; a]k/
sFileName = sName; ,'= Y
this.nSplitter = nSpiltter; sw' 20I
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} ~kS~v
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public String getSSiteURL() "@
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{ }pu2/44=W
return sSiteURL; 4Yt:PN2
} F04`MY"
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public void setSSiteURL(String value) }bIEW ho
{ @0A0\2
sSiteURL = value; O1JGv8Nr
} FGr0W|?v
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public String getSFilePath() O#H `/z
{ YCeE?S1gk3
return sFilePath; ZJP.-` U
} A_{QY&%m
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public void setSFilePath(String value) j Z3N+_J1
{ v8y77:
sFilePath = value; +'=^/!
} ?fnJ`^|-r
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public String getSFileName() ~fAdOh
{ ^ ^}
return sFileName; 67 }y/C]<
} 7eQ7\,^H
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public void setSFileName(String value) 4eU};Pv
{ '@AK0No\W
sFileName = value; >Hic
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} _&XT
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public int getNSplitter() Mn7 y@/1
{ wI
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return nSplitter; }qc[ysDK]
} H }uT'
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public void setNSplitter(int nCount) `2J6Dz"W
{ `;hsOfo
nSplitter = nCount; 3i?{E^
} &hB~Z(zS!
} Z!G;q}zZ!
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/* w{F8]N>0<
**Utility.java cGsP0LkHC
*/ {h&*H[Z z
package NetFox; yIXM}i:
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public class Utility { feIAgd},
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public Utility() f|Z3VS0x
{ iWCN2om
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} fT[6Cw5w`
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//线程睡眠 qnrf%rS
public static void sleep(int nSecond) &I:X[=;g
{ Gd%6lab
try{ 6\\B{%3R2
Thread.sleep(nSecond); > :!faWX
} lr +Kwve
catch(Exception e) +@Fy) {C7
{ qq[2h~6P]
e.printStackTrace (); }!Qo
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} .3{S6#
} d+fmVM?p
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//日志 -66|Y
public static void log(String sMsg) #T#&qo#
{ z.e%AcX
System.err.println(sMsg); 1
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1
}
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public static void log(int sMsg) wy&