/* a:]yFi:Su
**SiteFileFetch.java MR6vr.~
*/ %`\{Nxk
package NetFox; Y\x
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import java.io.*; |ZKchd8Yq
import java.net.*; |3cR'|<Ual
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public class SiteFileFetch extends Thread { 6a!X`%N=
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SiteInfoBean siteInfoBean = null; //文件信息Bean d$Xvax,C
long[] nStartPos; //开始位置 TP^0`L
long[] nEndPos; //结束位置 n#fg7d%
FileSplitterFetch[] fileSplitterFetch; //子线程对象 @'y"D
long nFileLength; //文件长度 ouI0"R&@
boolean bFirst = true; //是否第一次取文件 ;Os3
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boolean bStop = false; //停止标志 GgYomR:
File tmpFile; //文件下载的临时信息 C!P6Z10+j
DataOutputStream output; //输出到文件的输出流 \#}%E h
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) !1_:n D
public SiteFileFetch(SiteInfoBean bean) throws IOException 3N21[i2/m
{ lb('r"*.
siteInfoBean = bean; lo#,zd~
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); *$1)&2i
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 1 &<@(S<
if(tmpFile.exists ()) G~Sfpf
{ eTRx 6Fri(
bFirst = false; Nk7e iQ
read_nPos(); | ]!Ky[P
} pM'IQ3N
else $aPHl
{ ctUF/[_w;
nStartPos = new long[bean.getNSplitter()]; CBnouKc:
nEndPos = new long[bean.getNSplitter()]; U>_\
} )\D40,p
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} fzFvfMAU
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public void run() 1S[5#ewB;j
{ #u<oEDQ
//获得文件长度 'f?&EsIV?
//分割文件 n@07$lY@;
//实例FileSplitterFetch R|)2Dg
//启动FileSplitterFetch线程 78a-3){
//等待子线程返回 `k}l$ih`X
try{ (&P0la1
if(bFirst) d7_ g
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{ I~]Q55
nFileLength = getFileSize(); $uFh$f
if(nFileLength == -1) .KU SNrs'
{ e:GgA
System.err.println("File Length is not known!"); mj(&`HRs4
} O{B
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else if(nFileLength == -2) V^`?8P8d
{ @`kiEg'Q
System.err.println("File is not access!"); :B*vkwT
} CEX}`I*-
else Rgfc29(8
{ r}y[r}vk
for(int i=0;i<nStartPos.length;i++) I>kiah*
{ .W@(nQ-<
nStartPos = (long)(i*(nFileLength/nStartPos.length)); uFm+Y]h
} $p0 /6c
for(int i=0;i<nEndPos.length-1;i++) X@yr$3vC
{ _Vo)<--+I
nEndPos = nStartPos[i+1]; W3jXZ>
} \=w'HZH#+
nEndPos[nEndPos.length-1] = nFileLength; dDqr
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} %l8*t$8
} h5&/hBN
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//启动子线程 t":W.q<
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Vedyy\TU
for(int i=0;i<nStartPos.length;i++) j Ne(w<',P
{ M q^|M~
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), "+n4 c'
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), C@y}*XV[b
nStartPos,nEndPos,i); XdGpW
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); c?!YFm
fileSplitterFetch.start(); }xkLD!
} *3_f&Y
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), KMK&[E#r
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); >Lw}KO`
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 4#^'lKIx
nEndPos = " + nFileLength); HDF!`
// fileSplitterFetch[nPos.length-1].start(); 9TVB<}0G
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//等待子线程结束 y:[BP4H ?y
//int count = 0; )%iRZ\`f
//是否结束while循环 LbJtpwz>z
boolean breakWhile = false; c Ndw9?Z
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while(!bStop) .q0218l:dF
{ uQGz;F x
write_nPos(); K-J|/eB
Utility.sleep(500); hD nM+4D
breakWhile = true; kAZC"qM%i
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for(int i=0;i<nStartPos.length;i++) X}oj_zsy;^
{ )t|^Nuj8
if(!fileSplitterFetch.bDownOver) )\{'fF
{ X^zYQ6t
breakWhile = false; h [nH<m
break; R<f#r0 3@|
} 79)A%@YHQQ
} Gs[Vu@*
if(breakWhile) =2^Vgc
break; [RAj3Fr0
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//count++; j((hqJr
//if(count>4) '5'3_vM
// siteStop(); x!'7yx
} f?,-j>[.=f
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System.err.println("文件下载结束!"); 7^ 4jcfJH
} Pj'62[5z
catch(Exception e){e.printStackTrace ();} }l~]b3@qu
} )T>8XCL\}
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//获得文件长度 A2Q[%A
public long getFileSize() r)V Lf#3B
{ )))2fskZ
int nFileLength = -1; h~ $&
try{ f%c06Un=
URL url = new URL(siteInfoBean.getSSiteURL()); A:/}`
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); d!o.ASL{
httpConnection.setRequestProperty("User-Agent","NetFox"); zVdKYs i^
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int responseCode=httpConnection.getResponseCode(); Zb]/nP1P
if(responseCode>=400) .>P~uZiX!
{ QV0M/k<'
processErrorCode(responseCode); s}wO7Df=+
return -2; //-2 represent access is error oew|23Ytb
} 3c b[RQf
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String sHeader; *|oPxQCtK
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for(int i=1;;i++) W,Ty=:qm*
{ `|Ey)@w
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); )!A 2>
//Utility.log(in.readLine()); >5.zk1&H
sHeader=httpConnection.getHeaderFieldKey(i); [<yz)<<
if(sHeader!=null) ^p,3)$
{ AuAT]`
if(sHeader.equals("Content-Length")) #7o0dE;Kg9
{ k{a)gFH
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nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); QWw"K$l
break; .3@Ng
} -,^WaB7u\
} `y2ljIWJ
else 9\AS@SH{^T
break; Atd1qJ
} KSc~GP_
} !Av1Leb9$
catch(IOException e){e.printStackTrace ();} t@)my[ !
catch(Exception e){e.printStackTrace ();} d@ZoV
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Utility.log(nFileLength); dQ<(lzS~
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return nFileLength; >!
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} aM$=|%9/
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//保存下载信息(文件指针位置) K6hfauWd[
private void write_nPos() zmb@*/fK
{ 5mavcle{4r
try{ E~RV1)
output = new DataOutputStream(new FileOutputStream(tmpFile)); b@6:1x
output.writeInt(nStartPos.length); vTd-x>n
for(int i=0;i<nStartPos.length;i++) <Y>3
{ :G 5C ]'t
// output.writeLong(nPos); uoCGSXsi
output.writeLong(fileSplitterFetch.nStartPos); 4.Z(:g
output.writeLong(fileSplitterFetch.nEndPos); TV=c,*TV
} p+[}Hxx=
output.close(); !BUi)mo
} Q>=-ext}q
catch(IOException e){e.printStackTrace ();} :Fw?{0
catch(Exception e){e.printStackTrace ();} <tuS,.
} 9|=nV|R'6
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//读取保存的下载信息(文件指针位置) 9"ugz^uKt
private void read_nPos() Q]#Z9 H
{ a5?A!k\2
try{ ao$):,2*
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); tOH0IE c
int nCount = input.readInt(); !M(:U,?B
nStartPos = new long[nCount]; s}(X]Gx1
nEndPos = new long[nCount]; TwFb%YM
for(int i=0;i<nStartPos.length;i++) 2ykCtRe
{ iBoEZEHjw
nStartPos = input.readLong(); J3=BE2L
nEndPos = input.readLong(); gz61FW
} m}5q]N";x
input.close(); sPCMckt
} nxQ}&n
catch(IOException e){e.printStackTrace ();} G),db%,X2
catch(Exception e){e.printStackTrace ();} 8lwM{?k$
} fxtxu?A>
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private void processErrorCode(int nErrorCode) |$e:*
{ RmO yGSO
System.err.println("Error Code : " + nErrorCode); ?"j@;/=
} T~J?AKx
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//停止文件下载 t5)J;0/
public void siteStop() <xlm
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{ c7qwNs*f
bStop = true; 4#:\?HAu!
for(int i=0;i<nStartPos.length;i++) vg(K$o{BT
fileSplitterFetch.splitterStop(); ce' TYkPM
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} p)/
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} e<5Y94YE
//负责部分文件的抓取 U9#WN.noG
**FileSplitterFetch.java SRCOs1(EK9
*/ J#7y<
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package NetFox; 16$y`~c-z
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import java.io.*; a+?~;.i~
import java.net.*; xK;e\^v
j} RzXJ~t
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public class FileSplitterFetch extends Thread { &1GUi{I
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String sURL; //File URL \+Y!ILOI
long nStartPos; //File Snippet Start Position Z@J.1SaB
long nEndPos; //File Snippet End Position m mw-a0
int nThreadID; //Thread's ID Dg2uE8k
boolean bDownOver = false; //Downing is over inF6M8
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boolean bStop = false; //Stop identical Nl*i5 io
FileAccessI fileAccessI = null; //File Access interface >;nS8{2o
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException G;]:$J
{ /cY^]VLe
this.sURL = sURL; {4rQ7J4Ux
this.nStartPos = nStart; @vs@>CYdz
this.nEndPos = nEnd; AS;.sjgk
nThreadID = id; N5 n>
fileAccessI = new FileAccessI(sName,nStartPos);//定位 3s(Ia^
} nq;#_Rkr
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public void run() -<W2PY<
{ +LzovC@^
while(nStartPos < nEndPos && !bStop) i'tp1CI
{ xl]
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try{ :oa9#c`L
URL url = new URL(sURL); K.DXJ UR
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 1D{#rA.X
httpConnection.setRequestProperty("User-Agent","NetFox"); {}\CL#~y
String sProperty = "bytes="+nStartPos+"-"; 9
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httpConnection.setRequestProperty("RANGE",sProperty); >oqZ !V5[
Utility.log(sProperty); H(qm>h$bU
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InputStream input = httpConnection.getInputStream(); B\_[R'Pf&
//logResponseHead(httpConnection); 6
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byte[] b = new byte[1024]; nj2gs,k
int nRead; M|%c(K#E,3
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^:DyT@hQB5
{ rn" pKUd
nStartPos += fileAccessI.write(b,0,nRead); "#S>I8d
//if(nThreadID == 1) 1K[(ou'rl
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); D4Sh9:\
} 0IzZKRw
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Utility.log("Thread " + nThreadID + " is over!"); 7~vqf3ON4J
bDownOver = true; >saI+u'o
//nPos = fileAccessI.write (b,0,nRead); 4/MNqit+
} 8:{q8xZ=k
catch(Exception e){e.printStackTrace ();} 6tdI6
} knSuzq%*
} 9X]f [^
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//打印回应的头信息 j>!sN`dBj
public void logResponseHead(HttpURLConnection con) /DU*M,
{ yXF|Sqv
for(int i=1;;i++) ma]?
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{ (~#G'Hd
String header=con.getHeaderFieldKey(i); ;BI)n]L
if(header!=null) kZ[mM'u#
//responseHeaders.put(header,httpConnection.getHeaderField(header)); (6k>FSpg
Utility.log(header+" : "+con.getHeaderField(header)); t!jwY /T
else F<r4CHfh;
break; Yu3_=:
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}
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} H8i+'5x,?
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public void splitterStop() NI\H
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{ xOIg|2^8
bStop = true; Wk[)+\WQ?
} EUZq$@uWL
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} 7@P656{
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/* GP]TnQ<*;
**FileAccess.java !!+Da>
*//文件访问(定位,写) %#9P?COs&W
package NetFox; XU-*[\K
import java.io.*; <gcmsiB|
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public class FileAccessI implements Serializable{ i4VK{G~g"
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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 g)cY\`&W8
RandomAccessFile oSavedFile; CJA+v-
long nPos; ;]@exp5
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public FileAccessI() throws IOException p`p?li
{ 9K$]h2
this("",0); ,Hh*3rR^
} v= 8VvT8
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public FileAccessI(String sName,long nPos) throws IOException 1p=&WM
{ %,;gP.dh7
oSavedFile = new RandomAccessFile(sName,"rw"); * gHCy4u{
this.nPos = nPos; Yj3*)k
oSavedFile.seek(nPos); dyl
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} 9A<0zt
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public synchronized int write(byte[] b,int nStart,int nLen) qp@m&GH
{ q_pmwJ:UL
int n = -1; P'F~\**5
try{ k-vA#
oSavedFile.write(b,nStart,nLen); @it/$>R^)
n = nLen; L,W:,i/C
} fOLnK
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catch(IOException e) J7Sx!PQ
{ j^{b^!4~}
e.printStackTrace (); q55M8B 4w
} LGXZx}4@;
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return n; df yrn%^Ia
} :U8k|,~f
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} <a fO 6?`
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/* wZ
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**SiteInfoBean.java lZBv\JE
*/ C,(j$Id
package NetFox; m$)YYpX
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public class SiteInfoBean { Agz=8=S%
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private String sSiteURL; //Site's URL N7a[B>+`
private String sFilePath; //Saved File's Path d0TgqO{
private String sFileName; //Saved File's Name k 5t{
private int nSplitter; //Count of Splited Downloading File VYHOk3
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public SiteInfoBean() 3eJ\aVI>pE
{//nSplitter的缺省值为5 fG3wc
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//default value of nSplitter is 5 " xlJs93c
this("","","",5); raSF3b/0
} 75<el.'H
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 80 dSQ"y
{ 4^0\dq
sSiteURL= sURL; `..EQBM
sFilePath = sPath; wQ@Zwbx
sFileName = sName; *Gf&q
this.nSplitter = nSpiltter; ]!q
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} HhzkMJR8
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public String getSSiteURL() .v N)A
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{ !'+\]eA
return sSiteURL; X #&(~1O
}
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public void setSSiteURL(String value) u}^a^B$
{ w{RNv%hJ$=
sSiteURL = value; ?0? x+
} *sjj"^'=
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public String getSFilePath() 7YoofI
{ d&O'r[S
return sFilePath; _3s~!2
} -bv>iIC
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public void setSFilePath(String value) #FrwfJOV
{ ^vYVl{$bT
sFilePath = value; =1%zI%
} Xw&QrTDS`
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public String getSFileName() t-3v1cv"
{ 8<wtf]x
return sFileName;
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} eD>-`'7<
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public void setSFileName(String value) Zkwy.Hq^
{ jx^|2
sFileName = value; }CB=c]p
} =NVZ$K OZ
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public int getNSplitter() qat45O4A1
{ _ Yb
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return nSplitter; clPZd
} Y yQf
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public void setNSplitter(int nCount) ~frPV8^DP
{ Im0+`9Jw
nSplitter = nCount; Zztt)/6*
} ];d5X
} a"v"n$
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/* >#"jfjDuR
**Utility.java u8{@PlS
*/ W<cW;mO
package NetFox; ^C,/T2>
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public class Utility { ,q'gG`M
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public Utility() 5'{qEZs^QU
{ ~vjr;a(B
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} A
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//线程睡眠 }v'PY/d.
public static void sleep(int nSecond) R&x7