/* qg9VK'3o
**SiteFileFetch.java 6o=Q;Mezl
*/ HqoCl
package NetFox; fUa[3)I
import java.io.*; \Rz-*zr&
import java.net.*; (^mpb
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public class SiteFileFetch extends Thread { tL}_kK_!
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SiteInfoBean siteInfoBean = null; //文件信息Bean ZxU3)`O
long[] nStartPos; //开始位置 5rlZ'>I.
long[] nEndPos; //结束位置 Fa-F`U@h(m
FileSplitterFetch[] fileSplitterFetch; //子线程对象 X3l?
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long nFileLength; //文件长度 Wj"GS!5
boolean bFirst = true; //是否第一次取文件 qfa[KD)!aB
boolean bStop = false; //停止标志 zelM}/d
File tmpFile; //文件下载的临时信息 ~?<VT
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DataOutputStream output; //输出到文件的输出流 C*&FApG
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) B0$.oavC
public SiteFileFetch(SiteInfoBean bean) throws IOException SJ).L.Cm6
{ ZP;WXB`
siteInfoBean = bean; <nbc
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); E=L1q)
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ]o2 Z14
if(tmpFile.exists ()) uG{/yJeU
{ o6c>sh
bFirst = false; B(qwTz 51
read_nPos(); t:yJ~En]=
} 7xoq:oP-}N
else t>%+[7?6
{ R(W}..U0R"
nStartPos = new long[bean.getNSplitter()]; 8;Eg>_cL:
nEndPos = new long[bean.getNSplitter()]; 7]lUPLsl
} <g'0q*qE
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} [6cf$FS9
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public void run() 1}"Prx-
{ 3"p'WZ>
//获得文件长度 -i*]Sgese
//分割文件 $
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//实例FileSplitterFetch hL}AgY@
//启动FileSplitterFetch线程 EVW\Z 2N.
//等待子线程返回 C jZIBMGc
try{ H rI(uZ]
if(bFirst) Twq, 6X-
{ !1[ZfTX^a
nFileLength = getFileSize(); re@;6o
if(nFileLength == -1) +!eh\.u|]
{ :?f^D,w_B
System.err.println("File Length is not known!"); c%5Suu(J6
} T/iZ"\(~w
else if(nFileLength == -2) Z@6xu;O
{ ,^@z;xF
System.err.println("File is not access!"); :@K~>^+U
} JlhI3`X;/
else }-T
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{ "`Y.5.
for(int i=0;i<nStartPos.length;i++) buA/G-<e
{ 0i~?^sT'
nStartPos = (long)(i*(nFileLength/nStartPos.length)); bD<hzOa
} \VHRI<$+5
for(int i=0;i<nEndPos.length-1;i++) >\'gIIs
{ QR{>]I
nEndPos = nStartPos[i+1]; X{tfF!+iy
} k293wS
nEndPos[nEndPos.length-1] = nFileLength; CMC9%uq
} 6@-O#,]J
} L&G5 kY`
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//启动子线程 37 d-!
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ; ~#uH7k
for(int i=0;i<nStartPos.length;i++) $\q}A:
{ 67]!xy
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ".sRi
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), /kNSB;
nStartPos,nEndPos,i); yt#~n_
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); UNyk,
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fileSplitterFetch.start(); wPxtQv
} wkKSL
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ]:svR@E
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); l\HtP7]
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", -> `R[k
nEndPos = " + nFileLength); lX/:e=
// fileSplitterFetch[nPos.length-1].start(); U[|o!2$
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//等待子线程结束 lt& c/xi_
//int count = 0; gfQ1p ?
//是否结束while循环 %s ">:
boolean breakWhile = false; Y InPmR
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while(!bStop) n..R'vNj
{ {~EPP
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write_nPos(); ')>D*e
Utility.sleep(500); . H9a
breakWhile = true; 5U6b\jxX
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for(int i=0;i<nStartPos.length;i++) 8y'.H21:;
{ hE;BT>_dn
if(!fileSplitterFetch.bDownOver) lS/l
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{ U:uFrb,
breakWhile = false; o "1X8v
break; =6gi4!hE
} A$-\Er+f
} N `[ ?db-%
if(breakWhile) qqSFy>`P
break; yny1i9
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//count++; #7=- zda5
//if(count>4) J
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// siteStop(); G#j~8`3X
} t^"8
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System.err.println("文件下载结束!"); T9bUt |
} }A&I@2d
catch(Exception e){e.printStackTrace ();} ^wz 2e
} yZc#@R[0
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//获得文件长度 2*a5pFkb
public long getFileSize() >1 hhz
{ id[caP=`
int nFileLength = -1; Fhga^.5U&
try{ gl 27&'?E*
URL url = new URL(siteInfoBean.getSSiteURL()); k(M(]y_
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); xM![
httpConnection.setRequestProperty("User-Agent","NetFox"); Xo3@-D_c!c
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int responseCode=httpConnection.getResponseCode(); JC
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if(responseCode>=400) a?@lX>Z
{ BH0s` K"
processErrorCode(responseCode); 3EH7HW
return -2; //-2 represent access is error }J $\<ZT
} #]r'?GN
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String sHeader; GOD{?#c$
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for(int i=1;;i++) >Q:h0b_$U
{ R# ZO<g%'
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); vURgR
//Utility.log(in.readLine()); i5SDy(?r
sHeader=httpConnection.getHeaderFieldKey(i); DB(!*6#?
if(sHeader!=null) eVj7%9
{ 10^FfwRfM
if(sHeader.equals("Content-Length")) YT6dI"48
{ G\K!7k`)!
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); slaH 2}$xR
break; a3L-q>h
} mDO! o
} b4Pa5w
else ~SS3gL v
break; A_crK`3
} 6zI}?KZf
} nO#x"
catch(IOException e){e.printStackTrace ();} KW/LyiP#
catch(Exception e){e.printStackTrace ();} e xkPu-[W
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Utility.log(nFileLength); Yr[&*>S
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return nFileLength; @2;cv?i)
} U+zntB
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//保存下载信息(文件指针位置) 3,n" d-
private void write_nPos() d4p6.3
{ 1iqgVby
try{ ]r'D
output = new DataOutputStream(new FileOutputStream(tmpFile)); .A0fI";Q
output.writeInt(nStartPos.length); s6'=4gM
for(int i=0;i<nStartPos.length;i++) r AE5.Q!u
{ 0o:R:*
// output.writeLong(nPos); >dgz/n?:v
output.writeLong(fileSplitterFetch.nStartPos); -hc8IS
output.writeLong(fileSplitterFetch.nEndPos); ^tGAJ_b79
} &qG/\
output.close(); DxNob-Fr
} i0K 2#}=^
catch(IOException e){e.printStackTrace ();} [0y,K{8t
catch(Exception e){e.printStackTrace ();} 4@3 \Ihv
} 5=I({=/>
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//读取保存的下载信息(文件指针位置) 1C{0 R.
private void read_nPos() oSD=3DQ;
{ `e<IO_cg
try{ &uRT/+18W3
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); O}zHkcL
int nCount = input.readInt(); PiM(QR
nStartPos = new long[nCount]; @I?,!3`jS
nEndPos = new long[nCount]; )/@KdEA:
for(int i=0;i<nStartPos.length;i++) #%k_V+o3
{ yO7y`;Q(sF
nStartPos = input.readLong(); `WOoC
nEndPos = input.readLong(); y EfAa6
} >^Wpc
input.close(); \ YF@r7
} -LRx}Mb9
catch(IOException e){e.printStackTrace ();} jyW={%&
catch(Exception e){e.printStackTrace ();} Mb2a;s
} _ikKOU^8
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private void processErrorCode(int nErrorCode) %<nGm\
{ Yq00<kIDJ
System.err.println("Error Code : " + nErrorCode);
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} T90O.]S
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//停止文件下载 y4jiOhF<d
public void siteStop() -@>]iBl
{ W vB]Rs
bStop = true; 8iY.!.G#|
for(int i=0;i<nStartPos.length;i++) m<3. X"-
fileSplitterFetch.splitterStop(); ^-PYP:*
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} 6jc5B#
} yJC:
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//负责部分文件的抓取 rhPv{6Z|7
**FileSplitterFetch.java ZrEou}z(*
*/ W)r|9G8T
package NetFox; >$rH,Er
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import java.io.*; A]0R?N9wb_
import java.net.*; 3lWGa7<4Z
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public class FileSplitterFetch extends Thread { $m5Iv_
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String sURL; //File URL 81|[Y'f
long nStartPos; //File Snippet Start Position XkqsL0\
long nEndPos; //File Snippet End Position SHPDbBS
int nThreadID; //Thread's ID -!~pa^j
boolean bDownOver = false; //Downing is over j7g>r/1eE
boolean bStop = false; //Stop identical +76ao7d.
FileAccessI fileAccessI = null; //File Access interface -2}ons(
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException B=W#eu
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{ <e
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this.sURL = sURL; uYlyU~M:D
this.nStartPos = nStart; ~u0<c:C^
this.nEndPos = nEnd; w8q
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nThreadID = id; )g8Kicox5
fileAccessI = new FileAccessI(sName,nStartPos);//定位 \>oy2{=;'
} EVqqOp1$v4
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public void run() R>Ox(MG
{ h]i vXF*
while(nStartPos < nEndPos && !bStop) ^ux'-/
{ b~<V}tJ
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try{ dhP")@3K;p
URL url = new URL(sURL); PL31(!`@d
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); j)ln"u0R^B
httpConnection.setRequestProperty("User-Agent","NetFox"); #$U/*~m $
String sProperty = "bytes="+nStartPos+"-"; <M5fk?n,|
httpConnection.setRequestProperty("RANGE",sProperty); ]T5\LNyN
Utility.log(sProperty); Jc]k\U
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InputStream input = httpConnection.getInputStream(); p/LV^TQ
//logResponseHead(httpConnection); k`' *niz
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byte[] b = new byte[1024]; lOb(XH9
int nRead; @!ja/Y^
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) D\J.6W
{ /={N^8^=x
nStartPos += fileAccessI.write(b,0,nRead); /VEK<.,aMv
//if(nThreadID == 1) hfc~HKLC
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )3|a_
} |eye) E:
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Utility.log("Thread " + nThreadID + " is over!"); )Xt#coagS
bDownOver = true; ]sP
//nPos = fileAccessI.write (b,0,nRead); !"hzGgOOX
} nu|,wE!i
catch(Exception e){e.printStackTrace ();} Ks^wX
} mL#$8wUdt{
} 5~[][VV^
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//打印回应的头信息 i3L2N~:V
public void logResponseHead(HttpURLConnection con) T.%yeJiE
{ ]70ZerQ~L
for(int i=1;;i++) Ne3YhCC>
{ <wd;W;B
String header=con.getHeaderFieldKey(i); p7izy$Wc
if(header!=null) r1=j$G
//responseHeaders.put(header,httpConnection.getHeaderField(header)); *].qm
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Utility.log(header+" : "+con.getHeaderField(header)); qMA";Frt3N
else d}|z+D
break; Pv)^L
} G%!i="/9
} >xF&>SDC
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public void splitterStop() LU@1Gol
{ `6# s+JA[
bStop = true; +`$$^x
} HvZSkq^
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} g "c7$
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/* B"5xs
**FileAccess.java !HhF*Rlr
*//文件访问(定位,写) UV{})T*s
package NetFox; 4?
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import java.io.*; >@-.rkd(
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public class FileAccessI implements Serializable{ 7A$mZPKh
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 iO18FfM_
RandomAccessFile oSavedFile; J*:_3Wsy
long nPos; k;SKQN
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public FileAccessI() throws IOException !tx.2m*5
{ x'6i9]+r
this("",0); Qs8yJH`v
} O CCC' k
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public FileAccessI(String sName,long nPos) throws IOException T@zp'6\H
{ wM-H5\9n
oSavedFile = new RandomAccessFile(sName,"rw"); 1L?W+zMO
this.nPos = nPos; /_8nZVu
oSavedFile.seek(nPos); 55Mtjqfp
} z-sq9Qp&x
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public synchronized int write(byte[] b,int nStart,int nLen) MFWkJbZV
{ *{p:C
int n = -1; VrhHcvnZ
try{ {aK3'-7
oSavedFile.write(b,nStart,nLen); ]zIIi%
n = nLen; iHQ$L# 7
} t9lf=+%s
catch(IOException e) N{M25ucAHl
{ &Rz