/* Y@#N_]oXj
**SiteFileFetch.java yvzH}$!]
*/ %kop's&?C
package NetFox; \xl$z*zI
import java.io.*; z,E`+a;
import java.net.*; 3 )#Nc|
#}@8(>T
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public class SiteFileFetch extends Thread { L[D+=
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SiteInfoBean siteInfoBean = null; //文件信息Bean 1:^Xd~X
long[] nStartPos; //开始位置 r,Xyb`
long[] nEndPos; //结束位置 XMkRYI1~
FileSplitterFetch[] fileSplitterFetch; //子线程对象 }0]uA|lH*
long nFileLength; //文件长度 [)jNy_4
boolean bFirst = true; //是否第一次取文件
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boolean bStop = false; //停止标志 |te=DCO
File tmpFile; //文件下载的临时信息 _6,\;"it?8
DataOutputStream output; //输出到文件的输出流 w|S b`eR
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) (7b9irL&cn
public SiteFileFetch(SiteInfoBean bean) throws IOException {'h&[f>zcQ
{ v&/H6r#E.
siteInfoBean = bean; :7"Q
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ;zo|. YD
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Sa9VwVUE
if(tmpFile.exists ()) MI(#~\Y~P
{ *P7/ry^<F
bFirst = false; siCm)B
read_nPos(); W!O/t^H>
} bQq/~
else Kx)PK
{ LS9,:!$
nStartPos = new long[bean.getNSplitter()]; I}|a7,8
nEndPos = new long[bean.getNSplitter()]; *VJ ISJC
} iEr?s-or
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} P;z\vq<h
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public void run() N*&T)a
{ \ HUDZ2 s
//获得文件长度 j[A(@w"
//分割文件 c?_7e9}2
//实例FileSplitterFetch 1 /{~t[*.
//启动FileSplitterFetch线程 h6O'"
//等待子线程返回 !a:e=b7g
try{ @M-w8!.~
if(bFirst) }}]Lf 3;
{ _Y&.Nw
nFileLength = getFileSize(); 6=$<R4B
if(nFileLength == -1) ]jVE
{ xl,%
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System.err.println("File Length is not known!"); |X A0F\
} w5PscEc
else if(nFileLength == -2) %(khE-SW
{ fw,,cu`YA
System.err.println("File is not access!"); m{RXt
} %}zkmEY.e
else .(cpYKFX
{ )}N:t:rry
for(int i=0;i<nStartPos.length;i++) .|go$}Fk
{ [fT$# '6
nStartPos = (long)(i*(nFileLength/nStartPos.length)); JZxA:dg
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} 0%L:jq{5
for(int i=0;i<nEndPos.length-1;i++) _^(1Qb[
{ t'At9<ib
nEndPos = nStartPos[i+1]; y6d!?M(0U
} YzG?K0O%
nEndPos[nEndPos.length-1] = nFileLength; 2[pOGc$
} 2>k*9kyp
} 25vjn 1$sW
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//启动子线程 "PRHQW
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 8M,o)oH
for(int i=0;i<nStartPos.length;i++) Q0jg(=9wP
{ ]nRf%Vi8g
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 57;0,k5Gy
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 5,^DT15a4P
nStartPos,nEndPos,i); G,?a8(
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8r+u!$i!H
fileSplitterFetch.start(); !xR9I0V5
} p\;8?x
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %RtL4"M2j
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); zo"L9&Hzo
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", gvWgw7z
nEndPos = " + nFileLength); /LWk>[Z;
// fileSplitterFetch[nPos.length-1].start(); ;-py h(
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//等待子线程结束 xsRkO9x
//int count = 0; Lm`-q(!7w
//是否结束while循环 rBQ<5.
boolean breakWhile = false; U@yhFj_y
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while(!bStop) Ieq_XF]U
{ :^{KY(3
write_nPos(); 'bM=
Utility.sleep(500); aLm~.@Q
breakWhile = true; kBC$dW-
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for(int i=0;i<nStartPos.length;i++) &)tv4L&
{ ,GVX1B?
if(!fileSplitterFetch.bDownOver) Y0lLO0'
{ 4V,p\$;
breakWhile = false; }qp)VF
break; H6K8.
} 6g#yzex
} hV,T889'
if(breakWhile) 'JdK0w#
break; rWNe&gFM
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//count++; R8lja%+0$
//if(count>4) ?d?.&nt
// siteStop(); GQYn |vm
} ]5a3e+
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System.err.println("文件下载结束!"); 7@gH{p1
} Q wG_-
catch(Exception e){e.printStackTrace ();} ZEDvY=@a
} q+8de_"]
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//获得文件长度 19O
public long getFileSize() -U$;\1--
{ hTEb?1CXU
int nFileLength = -1; [6g$;SicT
try{ }8}`A\dgV
URL url = new URL(siteInfoBean.getSSiteURL()); J^#g?RHN>m
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); \DE,
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httpConnection.setRequestProperty("User-Agent","NetFox"); C"5P7F{
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int responseCode=httpConnection.getResponseCode(); fATVAv
if(responseCode>=400) nJv=kk1|o
{ T<Y*();Zo
processErrorCode(responseCode);
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return -2; //-2 represent access is error s1[.L~;J
} ~e,l2
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String sHeader; `IBNBJy
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for(int i=1;;i++) R%2.N!8v
{ 58HAl_8W
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ,']CqhL6=R
//Utility.log(in.readLine()); NA0Z~Ug>
sHeader=httpConnection.getHeaderFieldKey(i); DEkv,e
if(sHeader!=null) havmhS)O
{ G{X7;j e
if(sHeader.equals("Content-Length")) C]JK'K<7-
{ Zz:%KUl3
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); FhBV.,bU,m
break; y?r`[{L(lA
} M/[_~
} ;m.6 ~A
else eTgtt-;VR
break; Ug0c0z!b
} ,{(XT7hr
} {*8G<&
catch(IOException e){e.printStackTrace ();} =6\^F i
catch(Exception e){e.printStackTrace ();} rZB='(?
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Utility.log(nFileLength); $A,YQH+
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return nFileLength; rzie_)a Y%
} 2)$-L'YS
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//保存下载信息(文件指针位置) 6Xo "?f
private void write_nPos() 1K|F;p
{ x{ `{j'
try{ 3]}RjOTU
output = new DataOutputStream(new FileOutputStream(tmpFile)); M?('VOy)
output.writeInt(nStartPos.length); .C+(E@ey A
for(int i=0;i<nStartPos.length;i++) P =Q+VIP&
{ RiQg]3oY
// output.writeLong(nPos); Jo;&~/V
output.writeLong(fileSplitterFetch.nStartPos); N5K2Hv<"
output.writeLong(fileSplitterFetch.nEndPos); K3=0D!D q
} {!?M!/d
output.close(); F3o"ETle
} 0cfGI%
catch(IOException e){e.printStackTrace ();} @U?&1.\
catch(Exception e){e.printStackTrace ();} %52x:qGa
} Cq<Lj
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//读取保存的下载信息(文件指针位置) #k d9}
private void read_nPos() :nl,Ac
{ sEfT#$ a^8
try{ Zi\ex\ )5
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); >y#qn9rV1
int nCount = input.readInt(); pih 0ME}z
nStartPos = new long[nCount]; r.Z g<T
nEndPos = new long[nCount]; :?ZrD,D
for(int i=0;i<nStartPos.length;i++) I!kR:Z
{ H13\8Te{
nStartPos = input.readLong(); ]D,_<Kk
nEndPos = input.readLong(); <0~1
} [x=(:soEqC
input.close(); LN$T.r+
} xf7YIhL^*
catch(IOException e){e.printStackTrace ();} tV pXA'"!x
catch(Exception e){e.printStackTrace ();} X+u1p?
} %`]!atH
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private void processErrorCode(int nErrorCode) 8a8D0}'
{ Ie _{P&J
System.err.println("Error Code : " + nErrorCode); rhaq!s38:
} P&[&Dj
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//停止文件下载 'T qF}a7
public void siteStop() wm?%&V/#
{ Xj30bt
bStop = true; Y+$]N:\F\
for(int i=0;i<nStartPos.length;i++) -j rAk
fileSplitterFetch.splitterStop(); 5efN5Kt
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} a
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} {(Mmv[y
//负责部分文件的抓取 `Z{s,!z
**FileSplitterFetch.java z_KCG2=5
*/ DMp@B]>
package NetFox; 3'A0{(b
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import java.io.*; 2w+4B4
import java.net.*; s?9Y3]&+&M
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public class FileSplitterFetch extends Thread { 6r@>n_6LY
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String sURL; //File URL L+@X]OW8
long nStartPos; //File Snippet Start Position 3q@JhB
long nEndPos; //File Snippet End Position (ToD
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int nThreadID; //Thread's ID l S
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boolean bDownOver = false; //Downing is over w0H#M)c
boolean bStop = false; //Stop identical :1bDkoK
FileAccessI fileAccessI = null; //File Access interface (@^ySiU
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException fsnZHL}=n
{ J
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this.sURL = sURL; [Ne'2z
this.nStartPos = nStart; 9Nv?j=*$
this.nEndPos = nEnd; X$P(8'[9A
nThreadID = id; [[N${ C
fileAccessI = new FileAccessI(sName,nStartPos);//定位 ~mK+Q%G5
} Gp)J[8j
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public void run() ;qWSfCt/^
{ "VoufXM:
while(nStartPos < nEndPos && !bStop) k w
{ OkT@ _U
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try{ !
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URL url = new URL(sURL); 0sme0"Sl
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 9pS:#hg
httpConnection.setRequestProperty("User-Agent","NetFox"); i-@V
String sProperty = "bytes="+nStartPos+"-"; R@_3?Z!W=
httpConnection.setRequestProperty("RANGE",sProperty); ^f"|<r
Utility.log(sProperty); kG}F/GN?
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InputStream input = httpConnection.getInputStream(); gnxD'1_
//logResponseHead(httpConnection); r[GH#vF;7
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byte[] b = new byte[1024]; IQ-l%x[fue
int nRead; kFyp;=d:K
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Lg#(?tMp,'
{ {7%HK2='
nStartPos += fileAccessI.write(b,0,nRead); >@4AxV\
//if(nThreadID == 1) 3kF+wifsz
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Cp>y<C"
} CW/L(RQ
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= iDd{$
Utility.log("Thread " + nThreadID + " is over!"); cc}#-HKR[
bDownOver = true; 9zCuVUcd$.
//nPos = fileAccessI.write (b,0,nRead); 1Qz@
} mV4gw'.;7
catch(Exception e){e.printStackTrace ();} P7/Xh3
} T:|p[Xbo
} E:PPb9Kd
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//打印回应的头信息 +bJ~S:[
public void logResponseHead(HttpURLConnection con) #,XZ @u+
{ a{rUk%x
for(int i=1;;i++) J}#2Wy^{
{ W5:fY>7
String header=con.getHeaderFieldKey(i); ,7k1n{C)
if(header!=null) }? c%L8\
//responseHeaders.put(header,httpConnection.getHeaderField(header)); =]pEvj9o
Utility.log(header+" : "+con.getHeaderField(header)); Z ZCm438
else R1<$VR
break; ^~@3X[No
} ;<GxonIV
} h5-yhG
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public void splitterStop() @>J(1{m=Gy
{ RQ^
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bStop = true; W@'*G*f
} b^ [ z'
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} \ n^[!e"`
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/* KHJ wCv
**FileAccess.java C=cn.CX
*//文件访问(定位,写) ]?oJxW.
package NetFox; e-\/1N84
import java.io.*; 3MKu!
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public class FileAccessI implements Serializable{ Q1|zX@,
;#0$iE
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 |k%1mE(+=s
RandomAccessFile oSavedFile; 5ddfdIp
long nPos; Ld/6{w4ir
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public FileAccessI() throws IOException 0G33hIOS
{ Cx.##n0
this("",0); ^=1u2YdVw
} -o!bO9vC
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public FileAccessI(String sName,long nPos) throws IOException Em5,Zr_
{ ]+B.=mO_
oSavedFile = new RandomAccessFile(sName,"rw"); ^W@%(,xb
this.nPos = nPos; (~E-=+R[$&
oSavedFile.seek(nPos); z5Tsu1c
} t+]1D@h v
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public synchronized int write(byte[] b,int nStart,int nLen) |>m'szca4
{ 8c_X`0jy
int n = -1; i?uX'apk
try{ B
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oSavedFile.write(b,nStart,nLen); @7.7+blS"H
n = nLen; r3-<~k-
} PB5h5eX
catch(IOException e) .]JIo&>5
{ T{"Ur:p
e.printStackTrace (); n~}[/ly
} k)X\z@I'
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return n; YPNW%N!$|
} -/0\_zq7
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} 2k^rZ^^"
}Q ]-Y :
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/* 3]9Rmx
**SiteInfoBean.java ,9_O4O%
*/ wAX;)PLg
package NetFox; dGkw%3[
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public class SiteInfoBean { lcjOBu
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private String sSiteURL; //Site's URL m.1-[ 2{8~
private String sFilePath; //Saved File's Path J:&.[
private String sFileName; //Saved File's Name CYwV]lq:s
private int nSplitter; //Count of Splited Downloading File +'MO$&6
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public SiteInfoBean() ]vn*eqd
{//nSplitter的缺省值为5 SE6(3f$
//default value of nSplitter is 5 1TR+p? "
this("","","",5); |B*B>P#
} BmccSC;o4
:
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) qBh@^GxY),
{ oSkQ/5hg.
sSiteURL= sURL; bR~(Ry`
sFilePath = sPath; _;Xlw{FN^
sFileName = sName; )z18:C3
this.nSplitter = nSpiltter; @U1|?~M%s
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} kD%MFT4
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public String getSSiteURL() |uw48*t
{ dh [kx
return sSiteURL; l5&5VC)
} fR'!p: ~
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public void setSSiteURL(String value) !t"/w6X1I
{ "c]9Q%
sSiteURL = value; {k-_+#W"
} <#nU 06 fN
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public String getSFilePath() fKqr$59>
{ I
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return sFilePath; ecJjE
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} 1hgIR^;[b
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public void setSFilePath(String value) .FgeAxflP
{ FK~wr;[
sFilePath = value; :.]EM*p?GV
} b+J|yM<`
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public String getSFileName() 3ej237~F,L
{ ]GY8f3~|{
return sFileName; ~/-SKGzo-
} ;nW;M 4{
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public void setSFileName(String value) LTo!DUi`
{ stUv!
sFileName = value; hLgX0QV
} m?B=?;B9#
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public int getNSplitter()
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{ o4EY2
return nSplitter; S|k@D2k=
} 50-7L,
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public void setNSplitter(int nCount) CkNR{?S
{ yx-"&K=`
nSplitter = nCount; mH ju$d
} Is3Y>oX
} cyB+(jLHDs
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/* '[F`!X
**Utility.java hp2E! C ma
*/ bF_0',W
package NetFox; $poIWJM c
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public class Utility { F) Q[ cai
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public Utility() !wpK
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{ yLfyLyO L
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} /ZabY
|g^YD;9s.
//线程睡眠 *kK +Nvt8s
public static void sleep(int nSecond) l9eTghLi
{ UsU
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try{ 9(S=0<
Thread.sleep(nSecond); ';Nc;9
} H@wjZ;R
catch(Exception e) yy8BkG(
{ t855|
e.printStackTrace (); gsM$VaF(
} T$2A2gb`
} y< dBF[
x
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//日志 YB4
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public static void log(String sMsg) 1z&"V}y
{ YQ?hAAJ
System.err.println(sMsg); 2(3Q#3V
} YB 7A5
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