/* 4{Q{>S*h
**SiteFileFetch.java X":T>)J-
*/ I6B`G Im5
package NetFox; 8U$(9X
import java.io.*; ]g0h7q)79
import java.net.*; (aQNe{D#
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public class SiteFileFetch extends Thread { j4fv-{=$
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SiteInfoBean siteInfoBean = null; //文件信息Bean 3{j&J-
long[] nStartPos; //开始位置 )^^Eh=Kbj
long[] nEndPos; //结束位置 ]?$eBbt
FileSplitterFetch[] fileSplitterFetch; //子线程对象 PAUepO_
long nFileLength; //文件长度 {"x>ewAf
boolean bFirst = true; //是否第一次取文件 &LD=Zp%
boolean bStop = false; //停止标志 9BA*e-[
File tmpFile; //文件下载的临时信息 }bZcVc2
DataOutputStream output; //输出到文件的输出流 !eH9LRp
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ~g_]Sskf7
public SiteFileFetch(SiteInfoBean bean) throws IOException 4*vV9*'!
{ x%WL!Lo
siteInfoBean = bean; +"HLx%k
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); %9qG|A,cA
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); F6$QEiDu@
if(tmpFile.exists ()) J_H=GHMp}
{ e~+VN4D&b>
bFirst = false; oieZopYA
read_nPos(); Up/s)8$.
} n=+K$ R
else U fzA/
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nStartPos = new long[bean.getNSplitter()]; IB
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nEndPos = new long[bean.getNSplitter()]; <:tD m
} a0]n>C`~
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} yl#(jb[?1
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public void run() e_6-+l!f
{ e9 `n@
//获得文件长度 1lJY=`8qa
//分割文件 M2.Pf s
//实例FileSplitterFetch D@]*{WO
//启动FileSplitterFetch线程 {r$n
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//等待子线程返回 fF"\$Ny
try{ <A_L Zi
if(bFirst) 0)?.rthk4S
{ kp4(_T7R
nFileLength = getFileSize(); =y>g:}G7
if(nFileLength == -1) j?YZOO>X
{ k$u/6lw]IB
System.err.println("File Length is not known!"); b/I_iJ8t
} *s"dCc
else if(nFileLength == -2) (}|QSf:
{ ,dG2[<?o
System.err.println("File is not access!"); %O!~!'
} e{~3&
else giDe
{ UZ`G S$D@
for(int i=0;i<nStartPos.length;i++) +-VkRr#
{ 2[ #7YWs
nStartPos = (long)(i*(nFileLength/nStartPos.length)); (eOzntp8
} |?tUUT!`t
for(int i=0;i<nEndPos.length-1;i++) 2GHmA_7P
{ ks=l
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nEndPos = nStartPos[i+1]; vuOixAkw
} I`~ofq?r
nEndPos[nEndPos.length-1] = nFileLength; rTgCmr'&
} + \DGS
} CfSpwkg
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//启动子线程 ?0{8fGM4
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; cr&sI=i
for(int i=0;i<nStartPos.length;i++) SXA`o<Ma
{ AaVj^iy/X
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $Ka-ZPy<#
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 7AE)P[
nStartPos,nEndPos,i); "wB~*,Ny
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); |fJpX5W-l
fileSplitterFetch.start(); w=]bj0<A=
} D]{#!w(d
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ?dJ[?<aG
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 6zJ<27
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", y" (-O%Pe
nEndPos = " + nFileLength); XJs*DK
// fileSplitterFetch[nPos.length-1].start(); 2itJD1;
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//等待子线程结束 sO5~!W>Z
//int count = 0; (sXR@Ce$
//是否结束while循环 VdVUYp
boolean breakWhile = false; 0E6tH&
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while(!bStop) dK5|tWJX
{ Q :<&<i=I
write_nPos(); ^UB<U#8,
Utility.sleep(500); ':}
breakWhile = true; xXCSaBS~
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for(int i=0;i<nStartPos.length;i++) ^9{mjy0Q
{ ^F>C|FJ2
if(!fileSplitterFetch.bDownOver) yc#0c[ZQu
{ lji&]^1
breakWhile = false; ifA)Ppt<`
break; 8BL]]gT-I
} *gq~~(jH
} Z'vic#
if(breakWhile) *0K@^Db-
break; QO0#p1fom'
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//count++; 4\cJ}p}LZ{
//if(count>4) IQ${2Dpg[
// siteStop(); Znv3h
} xJQ-k/`
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System.err.println("文件下载结束!"); 8"f Z>XQ
} b6@(UneVM
catch(Exception e){e.printStackTrace ();} Zj(2$9IU
} |;G9K`8
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//获得文件长度 $jpAnZR- /
public long getFileSize() (}]ae*
{ :y>$N(.8f
int nFileLength = -1; z1-JoZ
try{ TqvgCk-
URL url = new URL(siteInfoBean.getSSiteURL()); f1hjU~nJ
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); zNZ"PYh<u
httpConnection.setRequestProperty("User-Agent","NetFox"); j}uVT2ZE%
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int responseCode=httpConnection.getResponseCode(); ?)8OC(B8q
if(responseCode>=400) yX-h|Cr"
{ s+EJXoxw
processErrorCode(responseCode); -<Wv7FNpD
return -2; //-2 represent access is error Y-0o>:SM
} ]vFtByqn
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String sHeader; 'b?Px}
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for(int i=1;;i++) -f{NVX\<0
{ 'Ti7}K
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); jjT|@\-u
//Utility.log(in.readLine()); %yVboA1
sHeader=httpConnection.getHeaderFieldKey(i); h#Z5vH
if(sHeader!=null) .L#xX1qr
{ @@?P\jv~
if(sHeader.equals("Content-Length")) bv%A;
{ %, Pwo{SH
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ySS
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break; uxxS."~
} e\9H'$1\
} UBgheu
else Vb
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break; L. %N
} \Q
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} A6 D@#(D
catch(IOException e){e.printStackTrace ();} f vAF0
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catch(Exception e){e.printStackTrace ();} -0 e&>H%
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Utility.log(nFileLength); 6r|Bi HP
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return nFileLength; ~h:/9q
} @(~m. p|
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//保存下载信息(文件指针位置) ggy 7p44
private void write_nPos() jkN-(v(T
{ b<1k$0J6
try{ nB8JdM2h{
output = new DataOutputStream(new FileOutputStream(tmpFile)); -F]0Py8(
output.writeInt(nStartPos.length); bG'"l qn
for(int i=0;i<nStartPos.length;i++) 5bfd8C
{ |t1ij'N
// output.writeLong(nPos); S7I8BS[*v
output.writeLong(fileSplitterFetch.nStartPos); :k-(%E](
output.writeLong(fileSplitterFetch.nEndPos); Sh]g]xR
} U1.w%b,
output.close(); K;n5[o&c
} >z,SN
catch(IOException e){e.printStackTrace ();} 6F@2:]W
catch(Exception e){e.printStackTrace ();} SEL7,8 Hm
} bnm3
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//读取保存的下载信息(文件指针位置) ;&A%"8o
private void read_nPos() e%B;8)7
{ ~&UfnO
try{ ZjOUk;H?
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); `;:zZ8*
int nCount = input.readInt(); jP{W|9@(
nStartPos = new long[nCount]; @S-p[u
nEndPos = new long[nCount]; _6"YWR
for(int i=0;i<nStartPos.length;i++) -f4>4@y
{ t$*V*gK{
nStartPos = input.readLong(); E&RiEhuv
nEndPos = input.readLong(); 0Xke26ga
} " iKX-VIl
input.close(); TqZ&X|G
} ,rO>5$ w.
catch(IOException e){e.printStackTrace ();} $PNS`@B
catch(Exception e){e.printStackTrace ();} Xyf7sHQ
} RH"&B`
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private void processErrorCode(int nErrorCode) FTA[O.tiG
{ |.q K69
System.err.println("Error Code : " + nErrorCode); :.K#=ROP
} `4&a"`&$
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//停止文件下载 ~I_v {
public void siteStop() _i-(`5
{ DM73
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bStop = true; %"1*,g{
for(int i=0;i<nStartPos.length;i++) MmvMuX]#)
fileSplitterFetch.splitterStop(); 9T#JlV
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} }'FNGn.~#
} r2Wx31j{
//负责部分文件的抓取 pFUW7jE
**FileSplitterFetch.java mHnHB.OL
*/ )Q!3p={S*
package NetFox; */kX|Sur
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import java.io.*; U'Xw'?Uj
import java.net.*; "]"!"#aMv
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public class FileSplitterFetch extends Thread { !aVwmd'9
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String sURL; //File URL Yy_o*Ozq
long nStartPos; //File Snippet Start Position nCj_4,O
long nEndPos; //File Snippet End Position 9 aE.jpN
int nThreadID; //Thread's ID T\Zq/Z\
boolean bDownOver = false; //Downing is over ?;//%c8,.
boolean bStop = false; //Stop identical TDMyZ!d
FileAccessI fileAccessI = null; //File Access interface !.[N(%"
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Gm]]Z_
{ @`</Z)
this.sURL = sURL; oQkY@)3.w
this.nStartPos = nStart; #kuk3}&
this.nEndPos = nEnd; <MPoDf?h
nThreadID = id; )bM #s">Y
fileAccessI = new FileAccessI(sName,nStartPos);//定位 @rTAbEk{U
} @\!9dK-W
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public void run() iTt#%Fs)4M
{ e^Ds|}{V
while(nStartPos < nEndPos && !bStop) WLb*\
{ #*g .hL<
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try{ ) ny,vcU]
URL url = new URL(sURL); )ZU=`!4
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); L
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httpConnection.setRequestProperty("User-Agent","NetFox"); V?k"BU
String sProperty = "bytes="+nStartPos+"-"; %/^kr ZD
httpConnection.setRequestProperty("RANGE",sProperty); Xgy)Z:R
Utility.log(sProperty); N'#Lb0`B
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InputStream input = httpConnection.getInputStream(); (,J`!Y hS
//logResponseHead(httpConnection); +hz^( I7
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byte[] b = new byte[1024]; lO+<T[
int nRead; Rv
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while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Lnk!zj
{ bEXm@-ou
nStartPos += fileAccessI.write(b,0,nRead); .Y.{j4[LQ
//if(nThreadID == 1) )A`Zgg'L7D
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]Tje6iF
} gAx8r-` `
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Utility.log("Thread " + nThreadID + " is over!"); 2Qoj>Wy{
bDownOver = true; A0NNB%4|/
//nPos = fileAccessI.write (b,0,nRead); tGKIJ`w*h
} ~~.v*C[
catch(Exception e){e.printStackTrace ();} 4b" %171
} C~2/ 5
} [":[\D'
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//打印回应的头信息 5 i1T?
public void logResponseHead(HttpURLConnection con) !~'\Ey
{ Kb_R "b3v
for(int i=1;;i++) V/0?0VKG
{ IH$R XGL
String header=con.getHeaderFieldKey(i); Y:nF.An3
if(header!=null) =jik33QV<
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ,RkL|'1l
Utility.log(header+" : "+con.getHeaderField(header)); x04JU$@
else L"i
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break; dBV^Khf J
} x 5u.D^
} C +-<
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public void splitterStop() 9`8\<a'rU
{ +[ _)i9a
bStop = true; 8F$b/Z
} !;SpQ28
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} \ B~9Ue!
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/* _v=@MOI/J
**FileAccess.java ]Q\Ogfjp
*//文件访问(定位,写) D_6GzgZ
package NetFox; :x*8*@kC
import java.io.*; ~P*t_cpZ
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public class FileAccessI implements Serializable{ {cF7h)j
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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 _tfZg /+)
RandomAccessFile oSavedFile; Fj9/@pe1
long nPos; @<]xbWhuw
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public FileAccessI() throws IOException &jg