/* ?2H{^\<(e
**SiteFileFetch.java
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*/ 60~v
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package NetFox; 0Wa#lkn$I
import java.io.*; cYsR0#
import java.net.*; Xfj)gPt}
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public class SiteFileFetch extends Thread { l#b:^3
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SiteInfoBean siteInfoBean = null; //文件信息Bean oz Vpfs
long[] nStartPos; //开始位置 QxKAXq@)i
long[] nEndPos; //结束位置
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FileSplitterFetch[] fileSplitterFetch; //子线程对象 7^HpVcSM
long nFileLength; //文件长度 P<8LAc$T
boolean bFirst = true; //是否第一次取文件 )sqaR^
boolean bStop = false; //停止标志 ',DeP>'%>
File tmpFile; //文件下载的临时信息 IT,"8s
DataOutputStream output; //输出到文件的输出流 L%f-L.9`u
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) GX7VlI[
public SiteFileFetch(SiteInfoBean bean) throws IOException [S%J*sz~
{ 4>l0V<
siteInfoBean = bean; v<j2L"bj
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Ec+22X
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); #sL/y
if(tmpFile.exists ()) -P2 @mx%
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bFirst = false; "=FIFf
read_nPos(); T{ok +$w2
} nz>K{(
else CK=ARh#|
{ f7.m=lbe
nStartPos = new long[bean.getNSplitter()]; .6LS+[
nEndPos = new long[bean.getNSplitter()]; OqtQA#uL
} 2,+d|1(4o
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} iEe#aO"D!
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public void run() nYhp`!W4;
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//获得文件长度 KA?v.s
//分割文件 RTZ:U@
//实例FileSplitterFetch uO"y`$C$_
//启动FileSplitterFetch线程 Gj)uyjct
//等待子线程返回 {b[tA,
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try{ FQ1arUOFW,
if(bFirst) IOX:yxj
{ >C:If0S4X
nFileLength = getFileSize();
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if(nFileLength == -1) gXF.on4B
{ g(nK$,c
System.err.println("File Length is not known!"); 6vF/e#},
} N70zjy4?fL
else if(nFileLength == -2)
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{ }{A?PHV5
System.err.println("File is not access!"); - {0g#G
} p+vh[+yp
else xvdY
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{ q1jN]H
for(int i=0;i<nStartPos.length;i++) ZRPE-l_3:
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); g1ytT%]
} b#A(*a_gN
for(int i=0;i<nEndPos.length-1;i++) fQP,=
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nEndPos = nStartPos[i+1]; Vcr VaBw
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nEndPos[nEndPos.length-1] = nFileLength; \@8*T S
} VjY<\WqbS
} =tn Tdp0F
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//启动子线程 ;$z7[+M
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ODek%0=
for(int i=0;i<nStartPos.length;i++) "ee'2O
{ 8<{;=m8cQ
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ^EuW(
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), o)p[
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nStartPos,nEndPos,i); YNk|+A.<d
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); A=y"x$%-_
fileSplitterFetch.start(); C 0>=x{,v
} /'\;8A$J`
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), |Q5+l.%
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); BJgDo
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", F3Dt7q
nEndPos = " + nFileLength); ,z[(k"
// fileSplitterFetch[nPos.length-1].start(); .yX>.>"T|
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//等待子线程结束 vtZ?X';wh
//int count = 0; d/lffNS=
//是否结束while循环 -;U3w.-
boolean breakWhile = false; 6rT4iC3Q{
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while(!bStop) Z\' wm'
{ AEqq1A
write_nPos(); c.0]1
Utility.sleep(500); (AuPZ
breakWhile = true; 4w;~4#ZPp
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for(int i=0;i<nStartPos.length;i++) "wINBya'M
{ LipxAE?O
if(!fileSplitterFetch.bDownOver) 3q?5OL^$
{ HCazwX
breakWhile = false; ;ctU&`
break; ;'^, ,{
} "xn|zB
} !oGQ8 e
if(breakWhile) |xeE3,8
break; Sr"/-
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//count++; !W~<q{VTs
//if(count>4) bE4HDq34
// siteStop(); /WYh[XKe
} H(&Z:{L
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System.err.println("文件下载结束!"); L
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} :1MMa6
catch(Exception e){e.printStackTrace ();} c{4R*|^
} `)tA
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//获得文件长度 @c]Xh:I
public long getFileSize() TY6
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{ v|&s4x?D
int nFileLength = -1; 4U{m7[
try{ ~-<:+9m
URL url = new URL(siteInfoBean.getSSiteURL()); v20~^gKo=m
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); FWY[=S
httpConnection.setRequestProperty("User-Agent","NetFox"); pBU]=[M0
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int responseCode=httpConnection.getResponseCode(); 3+9
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if(responseCode>=400) >qpqQ;
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{ \O? u*
processErrorCode(responseCode); 2kJ!E@n7
return -2; //-2 represent access is error ?!7
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} yoU2AMH2D^
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String sHeader; 2GUupnQkD
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for(int i=1;;i++) a(|xw
{ ^@"c`
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); !tBeuemN%
//Utility.log(in.readLine()); jsdBd2Gdc
sHeader=httpConnection.getHeaderFieldKey(i); 0'@u!m?
if(sHeader!=null) N&x:K+Zm.
{ N7pt:G2~%
if(sHeader.equals("Content-Length")) (3O1?n[n
{ 1i+FL''
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); [Xh\mDU.
break; _:%U_U
} /RqhykgZ
} Qc3?}os2
else ;
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break; n ,1tD
} {82rne`[
} e?=elN
catch(IOException e){e.printStackTrace ();} Rf:<-C0T
catch(Exception e){e.printStackTrace ();} 6RP+4c
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Utility.log(nFileLength); ;dOs0/UM&
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return nFileLength; %YCd%lAe,
} N5KEa]k1nw
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//保存下载信息(文件指针位置) G
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private void write_nPos() piuKVU
{ 6V
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try{ ]738Z/)^
output = new DataOutputStream(new FileOutputStream(tmpFile)); !
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output.writeInt(nStartPos.length); LfllO
for(int i=0;i<nStartPos.length;i++) ;Z4o{(/zU
{ pZ\$50t&O
// output.writeLong(nPos); RM#fX^)=
output.writeLong(fileSplitterFetch.nStartPos); Vrg3{@$
output.writeLong(fileSplitterFetch.nEndPos); f8#*mQ
} esteFLm`6
output.close(); )Oe`s(O@[I
} )7w@E$l"
catch(IOException e){e.printStackTrace ();} .HCaXFW
catch(Exception e){e.printStackTrace ();} > [8#hSk
} O8[k_0@
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//读取保存的下载信息(文件指针位置) ?~ ?Hdv
private void read_nPos() zv@bI~3~
{ 5}7ISNP;f
try{ |=u96G~N
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); W]@6=OpH
int nCount = input.readInt(); IhwN],-V
nStartPos = new long[nCount]; *(p7NYf1
nEndPos = new long[nCount]; gg(k7e
for(int i=0;i<nStartPos.length;i++) .OV-`TNWj
{ 7dHIW!OA
nStartPos = input.readLong(); .v\PilF
nEndPos = input.readLong(); :~i+tD
} M=6G:HHY
input.close(); t*s!0'Y
} NFV_+{X\
catch(IOException e){e.printStackTrace ();} CdNih8uG
catch(Exception e){e.printStackTrace ();} ^X^,>Z|
} S
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private void processErrorCode(int nErrorCode) _6LH"o3
{ _<3r'Y,
System.err.println("Error Code : " + nErrorCode); %:%MUdl6
} POY=zUQ'/
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);!dg\U
//停止文件下载 Z>&K&ttJ
public void siteStop() LC76 Qi;|k
{ SKW;MVC
bStop = true; t%:G|n Sz
for(int i=0;i<nStartPos.length;i++) 4Lw'v: (
fileSplitterFetch.splitterStop(); LjCykk
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} VD9J}bgJ
} #]igB9Cf)w
//负责部分文件的抓取 (c<