/* Az-!X!O*f
**SiteFileFetch.java yb)qg]2
*/ IM,4Si2
package NetFox; :G]t=vr1
import java.io.*; s%8,'3&
import java.net.*; 8'NT_NPNb
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public class SiteFileFetch extends Thread { [)kuu
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SiteInfoBean siteInfoBean = null; //文件信息Bean <_]W1V:0
long[] nStartPos; //开始位置 .$
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long[] nEndPos; //结束位置 6{0MprY
FileSplitterFetch[] fileSplitterFetch; //子线程对象 REh\WgV!u
long nFileLength; //文件长度 S<-5<Pg
boolean bFirst = true; //是否第一次取文件 1Dhu5ht
boolean bStop = false; //停止标志 e}P@7e h
File tmpFile; //文件下载的临时信息 KD\sU6
DataOutputStream output; //输出到文件的输出流 \ H#"
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) G]{^.5
public SiteFileFetch(SiteInfoBean bean) throws IOException |n^rI\p%
{ .g?D3$|K
siteInfoBean = bean; >3~)2)Q
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Oi]B%Uxy=
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Jr= fc*f
if(tmpFile.exists ()) [LUqF?K&
{ T LF'7ufq
bFirst = false; Le{.B@2-"
read_nPos(); Q04
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} .:GOKyr(~
else & JJ*?Dl
{ O{Mn\M6
nStartPos = new long[bean.getNSplitter()]; :z *jl'L
nEndPos = new long[bean.getNSplitter()]; K
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} -WR<tkK
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} SJlE!MK
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public void run() %Pj}
{ ~*UY[!+4^=
//获得文件长度 7,8TMd1`M
//分割文件 8?x:PkK
//实例FileSplitterFetch >"|t*kS
//启动FileSplitterFetch线程 tmM; Z(9t
//等待子线程返回 Y> ATL
try{ 3-)}.8F
if(bFirst) uPxjW"M+
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nFileLength = getFileSize(); TIR Is1
if(nFileLength == -1) (<-m|H};
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System.err.println("File Length is not known!"); 0
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} B7YE+
else if(nFileLength == -2) &
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{ eH[i<Z
System.err.println("File is not access!"); x5Fo?E
} zA:q/i
else jUgx
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for(int i=0;i<nStartPos.length;i++) ;sq xFF@
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); 6Z2|j~
} 9_e_Ne`i`?
for(int i=0;i<nEndPos.length-1;i++) 3(vm'r&5n>
{ ='_3qn.
nEndPos = nStartPos[i+1]; i\gt
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nEndPos[nEndPos.length-1] = nFileLength; `&xdS H
} Uj3HAu
} !c-MC|
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//启动子线程 pG"hZB3)
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; AZA5>Y
for(int i=0;i<nStartPos.length;i++) @$
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{ g jzWW0C
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), :XPat93w
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), \pTv;(
nStartPos,nEndPos,i); {XUSw8W'
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); kBk2mMZ
fileSplitterFetch.start(); oDJ
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} ! hEZV&y
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), nZc6
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); H~SU:B:
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", D ]
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nEndPos = " + nFileLength); U>m{B|H
// fileSplitterFetch[nPos.length-1].start(); ]=I2:Rb
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//等待子线程结束 1uR@ZK
//int count = 0; 3d7A/7S
//是否结束while循环 W1t_P&i
boolean breakWhile = false; F:[[@~z
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while(!bStop) n<<arO"cv
{ ?~#[cx
write_nPos(); Z7[S698
Utility.sleep(500); J^%E$s
breakWhile = true; ^Jdg%U?
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for(int i=0;i<nStartPos.length;i++) jO|`aUYTf
{ yf`_?gJ6d
if(!fileSplitterFetch.bDownOver) cz>)6#&O
{ TBba3%
breakWhile = false; a2i:fz=[
break; jsr)
} :`"-Jf
} G\,B*$3
if(breakWhile) h4MBw=Tz~
break; 0Js5 '
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//count++; a|[f%T<<
//if(count>4) 3u^wK
// siteStop(); qe(C>qjMbG
} :,R>e}lM
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System.err.println("文件下载结束!"); A&%7Z^Pp
} @,6*yyO
catch(Exception e){e.printStackTrace ();} X.,R%>O}`P
} IB 4L(n1
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//获得文件长度 QR8]d1+GV
public long getFileSize() nGc'xQy0
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int nFileLength = -1; )J+rt^4|
try{ 7Q~W}`Qv'
URL url = new URL(siteInfoBean.getSSiteURL()); T2)CiR-b
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Uspv^O9_
httpConnection.setRequestProperty("User-Agent","NetFox"); {TMng&
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int responseCode=httpConnection.getResponseCode(); p|a`Q5z!
if(responseCode>=400) I3T;|;P7
{ DW :\6k
processErrorCode(responseCode); [eTEK W]
return -2; //-2 represent access is error o8%o68py
} MTgf.
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String sHeader; x;~@T9.
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for(int i=1;;i++) <@+L^Ps~z
{ f(!cz,y^\*
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); xCT2FvX6
//Utility.log(in.readLine()); [C~N#S[]
sHeader=httpConnection.getHeaderFieldKey(i); ",,.xLI7
if(sHeader!=null) r;H#cMj
{ `022gHYv
if(sHeader.equals("Content-Length")) +u\w4byl
{ +ek6}f#
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); V|HO*HiB3
break; (I>S qM
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} |o(te
} f.oY:3h:
else aM,g@'.=
break; 2~r2ErtS
} 6Rq +=X
} e},:QL0X
catch(IOException e){e.printStackTrace ();} mRGr+m
catch(Exception e){e.printStackTrace ();} nKtRJ,>
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Utility.log(nFileLength); i??+5o@uTF
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return nFileLength; <4 /q5*&
} |q\i, }
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//保存下载信息(文件指针位置) {`J!DFfur
private void write_nPos() (r}StR+
{ $`t2SD
try{ +#(GU9_i+M
output = new DataOutputStream(new FileOutputStream(tmpFile)); ?@Tsd@s~r
output.writeInt(nStartPos.length); Yc3\
for(int i=0;i<nStartPos.length;i++) gQY`qz
{ _ |HA\!
// output.writeLong(nPos); $`0,N_C<}
output.writeLong(fileSplitterFetch.nStartPos); _25PyG
output.writeLong(fileSplitterFetch.nEndPos); =>A}eR1Y
} <&)zT#"
output.close(); Pmr'W\aIR
} tO"AeZe%|
catch(IOException e){e.printStackTrace ();} 4U'sBaY!K
catch(Exception e){e.printStackTrace ();} dI=&gz
} &fkH\o7)
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//读取保存的下载信息(文件指针位置) o4z|XhLr
private void read_nPos() T`<Tj?:^&
{ [E2".F3
try{ Zny9TP
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); {%,4P_m
int nCount = input.readInt(); >^<;;8Xh
nStartPos = new long[nCount]; i-dosY`81
nEndPos = new long[nCount]; ~52'iI)Mw
for(int i=0;i<nStartPos.length;i++) >:FmAey
{ v"Ryg]^_
nStartPos = input.readLong(); \]\GDpu[
nEndPos = input.readLong(); !Ow
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} X;vUz
input.close(); 8hyXHe
} [+}0K{(O=
catch(IOException e){e.printStackTrace ();} /@DJf\`vM
catch(Exception e){e.printStackTrace ();} YuzVh9jTI
} >I&s%4
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private void processErrorCode(int nErrorCode) V^}$f3\B
{ {sq:vu@NC
System.err.println("Error Code : " + nErrorCode); a/%qn-i|p
} "#f5jH
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//停止文件下载 wW<u)|>ye
public void siteStop() uX1{K%^<TW
{ n1'i!NWt
bStop = true; 7s}F`fjKP
for(int i=0;i<nStartPos.length;i++) 1h)K3cC
fileSplitterFetch.splitterStop(); Hbu
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} <fMQ#No
} zP c54>f
//负责部分文件的抓取 @x*,fk
**FileSplitterFetch.java }ZiJHj'<
*/ eV;nTj
package NetFox; Q yQ[H
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import java.io.*; u:wijkx
import java.net.*;
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public class FileSplitterFetch extends Thread { : 'jVA
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String sURL; //File URL PklJU:Pu\U
long nStartPos; //File Snippet Start Position 4 .(5m\s!
long nEndPos; //File Snippet End Position ~!%G2E!
int nThreadID; //Thread's ID <