/* +L<w."WG
**SiteFileFetch.java f/|a?n2\hm
*/ :7'0:'0$t
package NetFox; 07E".T%Ts
import java.io.*; iI/'!85
import java.net.*; d,E/9y\e
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public class SiteFileFetch extends Thread { u]++&~i
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SiteInfoBean siteInfoBean = null; //文件信息Bean Phjf$\pt
long[] nStartPos; //开始位置 55)ep
long[] nEndPos; //结束位置 [s&
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FileSplitterFetch[] fileSplitterFetch; //子线程对象 PhaQ3%
long nFileLength; //文件长度 qoyGs}/I8
boolean bFirst = true; //是否第一次取文件 *?
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boolean bStop = false; //停止标志 4<!}4
File tmpFile; //文件下载的临时信息 <=LsloI
DataOutputStream output; //输出到文件的输出流 vzT6G/
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 8Gzs
public SiteFileFetch(SiteInfoBean bean) throws IOException _{@}Fd?o
{ @a{v>)
siteInfoBean = bean; [pyXX>:M
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); G5Dji_ |
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); }j5@\c48
if(tmpFile.exists ()) +[go7A$5
{ 5la]l
bFirst = false; ^SelqX
read_nPos(); 1Y"y!\t7G
} ob()+p.k K
else '$&(+>)z`
{ " kJWWR
nStartPos = new long[bean.getNSplitter()]; 5&7?0h+I
nEndPos = new long[bean.getNSplitter()]; (]#
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} x[,wJzp\6
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} [!|d[
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public void run() g960;waz3
{ lKD<
//获得文件长度 ry<}DK<u
//分割文件 #esu@kMU`
//实例FileSplitterFetch .J!
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//启动FileSplitterFetch线程 mJ#B<I'
//等待子线程返回 x#xO {
try{ $/sZYsN~T
if(bFirst) "VOWV3Z
{ DT~y^h
nFileLength = getFileSize(); OKH~Y-%<
if(nFileLength == -1) 7]+'%Uwu)
{ T<~[vjA
System.err.println("File Length is not known!"); Z`Eb
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} tfU3 6PR
else if(nFileLength == -2) ?z36mj"`o
{ At_Y$N:
System.err.println("File is not access!"); Zvw3C%In
} C=f(NpyD6
else C4K&flk]
{ :a<TV9?H0
for(int i=0;i<nStartPos.length;i++) q|_ 5@Ly
{ MrjB[3Td
nStartPos = (long)(i*(nFileLength/nStartPos.length)); mI*>7?
} [==Z1Q;=
for(int i=0;i<nEndPos.length-1;i++) ;DWp>jgy
{ .0/Z'.c8
nEndPos = nStartPos[i+1]; YuW\GSV00
} aNEy1-/(\
nEndPos[nEndPos.length-1] = nFileLength; :jp$X|
} /hy!8c7
} N=q29JU
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//启动子线程 &(1NOyX&
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; !ZcALtq
for(int i=0;i<nStartPos.length;i++) m!>'}z
{ -5*;J&.
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ]=$ay0HC
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), CUM~*
nStartPos,nEndPos,i);
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Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qMj
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fileSplitterFetch.start(); B_G7F[/K
} ~a|Q[tiV]
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~Q\uP(!D
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); R^C;D2
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 5~6y.S
nEndPos = " + nFileLength); Sk%|-T(d$
// fileSplitterFetch[nPos.length-1].start(); VL1z$<vVXt
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g9Qxf% }
//等待子线程结束 O!yn
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//int count = 0; U?C{.@#w
//是否结束while循环 r>eXw5Pr7
boolean breakWhile = false; gVWLY;c 3}
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while(!bStop) R-|]GqS}L
{ ! (tJZ5
write_nPos(); PQ|x?98
Utility.sleep(500); he6)
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breakWhile = true; {u][q
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for(int i=0;i<nStartPos.length;i++) ps
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{ >b${rgCvQ
if(!fileSplitterFetch.bDownOver) NP/2gjp
{ 6u8fF|s
breakWhile = false; 0 pz
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break; 6lFs N2
} c9={~
} hY'%SV
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if(breakWhile) t`{Fnf
break; <H#K `|Ag
^ 9E(8DD
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//count++; 4h(Hy&1C
//if(count>4) );LwWKa
// siteStop(); ?Fw/c0
} 4\RuJx
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System.err.println("文件下载结束!"); ShxX[k
} &*-2k-16
catch(Exception e){e.printStackTrace ();} Grv|Wuli
} ,B!Qv3bn
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//获得文件长度 \aozecpC`
public long getFileSize() aT[7L9Cw
{ }(6k7{,Gw,
int nFileLength = -1; "yk%/:G+
try{ Aed"J5[a
URL url = new URL(siteInfoBean.getSSiteURL()); :r=_\?
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); VVOt%d
httpConnection.setRequestProperty("User-Agent","NetFox"); 2e=Hjf
)
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int responseCode=httpConnection.getResponseCode(); ya=51~ by"
if(responseCode>=400) yFqC-t-i
{ f|)t[,c
processErrorCode(responseCode); Qa+gtGtJ
return -2; //-2 represent access is error ^(3k
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} ?;Qk!t2U
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String sHeader; h'+ swPh
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for(int i=1;;i++) hpu(MX\
{ =G :H)i
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 5[k35c{
//Utility.log(in.readLine()); ,8seoX^
sHeader=httpConnection.getHeaderFieldKey(i); he #iWD'
if(sHeader!=null) mLSAi2Y
{ 0Og =H79<
if(sHeader.equals("Content-Length")) EQ -\tWY
{ 4j5 "{
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); FqfeH_-U
break; U@WT;:.T
} {H74`-C)W
} ]M/w];:
else wpdT "
break; \=JKeL|6[S
} pFh2@O
} `/O_6PQ}
catch(IOException e){e.printStackTrace ();} l;4F,iI
catch(Exception e){e.printStackTrace ();} fi1UUJ0
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Utility.log(nFileLength); P<1zXs.H
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return nFileLength; 6 S8#[b
} G+ToZ&f@
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//保存下载信息(文件指针位置) YL]x>7T~4t
private void write_nPos() 7K~=Q Ec
{ fXN;N&I
try{ N.]8qzW
output = new DataOutputStream(new FileOutputStream(tmpFile)); ?^5x
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output.writeInt(nStartPos.length); 01J.XfCd6
for(int i=0;i<nStartPos.length;i++) uAP|ASH9T
{ Q["}U7j
// output.writeLong(nPos); hikun2
output.writeLong(fileSplitterFetch.nStartPos); ;]gph)2cd
output.writeLong(fileSplitterFetch.nEndPos); /CP1mn6H
} J<2N~$
output.close(); @S{,g;8
} y(HR1vQ;Z
catch(IOException e){e.printStackTrace ();} jm!G@k6TA
catch(Exception e){e.printStackTrace ();} yR&E6o.$z
} =8]'/b
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//读取保存的下载信息(文件指针位置) MkQSq
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private void read_nPos() QS[%`-dR2
{ 1t6UI4U!$
try{ cla4%|kq3Y
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); j%lW+[%
int nCount = input.readInt(); iVD9MHT4
nStartPos = new long[nCount]; E @7! :
nEndPos = new long[nCount]; [mhY_Hmz]
for(int i=0;i<nStartPos.length;i++) "|hmiMdGB
{ [bAv|;
nStartPos = input.readLong(); {2,V3*NF
nEndPos = input.readLong(); ZEB1()GB
} ?O.&=im_
input.close(); ?wmr~j
} hHdC/mR
catch(IOException e){e.printStackTrace ();} J &c}z4
catch(Exception e){e.printStackTrace ();} aw(P@9]
} JI.ad_IR
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private void processErrorCode(int nErrorCode) 46*?hA7@r(
{ _rSnp
System.err.println("Error Code : " + nErrorCode); ce@(Ct
} vJYy` k^Y
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//停止文件下载 ztf (.~
public void siteStop() !d ZHG
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{ rXA7<_V g
bStop = true; ^K3{6}]
for(int i=0;i<nStartPos.length;i++) Zf|f $1-
fileSplitterFetch.splitterStop(); k+&| *!j
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} +&|WC2#
} \i{=%[c
//负责部分文件的抓取 $L?stgU
**FileSplitterFetch.java #bnFR
*/ 98x(2fCvF(
package NetFox; qUCiB}
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import java.io.*; FX\ -Y$K
import java.net.*; U:ZklDW
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public class FileSplitterFetch extends Thread { Ry,jPw5<
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String sURL; //File URL zL1H[}[z+
long nStartPos; //File Snippet Start Position -8g ;t3z
long nEndPos; //File Snippet End Position (ZDRjBth[
int nThreadID; //Thread's ID --y.q~d
boolean bDownOver = false; //Downing is over R:=i/P/
boolean bStop = false; //Stop identical HdLVXaD/
FileAccessI fileAccessI = null; //File Access interface d!!5'/tmS
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException oMcX{v^"
{ +.{_n(kU
this.sURL = sURL; FD[*mCGZ
this.nStartPos = nStart; Z?X
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this.nEndPos = nEnd; pS9CtQqvgy
nThreadID = id; EY':m_7W
fileAccessI = new FileAccessI(sName,nStartPos);//定位 /8lGP!z
} .BZw7
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public void run() P$\(Bd\76
{ bc%7-%
while(nStartPos < nEndPos && !bStop) Ry tQNwv3
{ +Nyx2(g<m
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try{ KD=T04v
URL url = new URL(sURL); az\;D\\
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); #NwlKZ-
httpConnection.setRequestProperty("User-Agent","NetFox"); >PfYHO
String sProperty = "bytes="+nStartPos+"-"; uG~%/7Qt{
httpConnection.setRequestProperty("RANGE",sProperty); Jy{A1i@4~s
Utility.log(sProperty); gtJUQu p2
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InputStream input = httpConnection.getInputStream(); e$fxC-sZ
//logResponseHead(httpConnection); qbpvTTF
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byte[] b = new byte[1024]; |&o%c/
int nRead; 3L/>=I{5
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 8 }nA8 J
{ ^3 F[^#"
nStartPos += fileAccessI.write(b,0,nRead); 26&^n
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//if(nThreadID == 1) +kmPQdO;*/
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
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} M n3cIGL
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Utility.log("Thread " + nThreadID + " is over!"); n@Y`g{{e~
bDownOver = true; z{7&= $
//nPos = fileAccessI.write (b,0,nRead); zH.DyD5T;
} T1LtO O
catch(Exception e){e.printStackTrace ();} \ 2*<Pq
} rX)PN3TD
} ]@)X3}"!
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//打印回应的头信息 S2@[F\|r
public void logResponseHead(HttpURLConnection con) OIe {Sx{y
{ !Z`~=n3bk
for(int i=1;;i++) oOnk,U
{ ,g;~:
String header=con.getHeaderFieldKey(i); H*?U@>UU
if(header!=null) >| rID
//responseHeaders.put(header,httpConnection.getHeaderField(header)); y}R{A6X)
Utility.log(header+" : "+con.getHeaderField(header)); a{mtG{Wc
else }[SWt3qV1
break; o5-oQ_j
} 5M;fh)fT
} -"UK NB!
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public void splitterStop() TwqyQ49
{ ]3BTL7r
bStop = true; =hH>]$J[
} O&!+ni
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} !vHnMY~AG
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/* l`UJHX
**FileAccess.java k3da*vwE
*//文件访问(定位,写) _>9|"seR
package NetFox;
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import java.io.*; @0; 9.jml,
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public class FileAccessI implements Serializable{ hWfJh0I
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 M}k )Ep9
RandomAccessFile oSavedFile; DN2K4%cM%'
long nPos; s4<[f%^
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public FileAccessI() throws IOException >Vy=5)/i
{ /pan{.< k
this("",0); 2
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} F #Uxl%h
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public FileAccessI(String sName,long nPos) throws IOException 0(VH8@h`O
{ !@{_Qt1
oSavedFile = new RandomAccessFile(sName,"rw"); s3HwBA
this.nPos = nPos; kj~)#KDN
oSavedFile.seek(nPos); 0}2Uj>!i
} Oh9wBV
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public synchronized int write(byte[] b,int nStart,int nLen) d/!sHr69
{ GMU.Kt
int n = -1; f50qA;7k
try{ PX65Z|~>_
oSavedFile.write(b,nStart,nLen); [X ]\^
n = nLen; Wp/!;
} ck>|p09q'9
catch(IOException e) :0$(umW@I"
{ 3Bee6N>
e.printStackTrace (); %H75u6
} }00mJ]H(
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return n; .\= GfF'
} gRIRc4p
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} D-\\L[
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/* q{@j$fMt0
**SiteInfoBean.java BoYWx^VHx^
*/ :P#
package NetFox; ;ZPAnd:pb
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public class SiteInfoBean { 4SCb9|/Q
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private String sSiteURL; //Site's URL b2u_1P\
private String sFilePath; //Saved File's Path m663%b(5>
private String sFileName; //Saved File's Name )` -b\8uw
private int nSplitter; //Count of Splited Downloading File S1(. AI~
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public SiteInfoBean() A<2_V1
{//nSplitter的缺省值为5 gm~Ka%O|F
//default value of nSplitter is 5 !31v@v:)
this("","","",5); jo{[*]Oa
} i`Fg kABw
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) mj=$[y(
{
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sSiteURL= sURL; tX$%*Uy
sFilePath = sPath; ]S9~2;2^,
sFileName = sName; L$6{{Tw"2
this.nSplitter = nSpiltter; .>DqdtP[
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} KArt4+31
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public String getSSiteURL() :"7V,UP
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{ -twV?~f
return sSiteURL; = zW}vm }
} Q!(16
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public void setSSiteURL(String value) M@EML
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{ -8;U1 ^#
sSiteURL = value; x~C%Hp*#
} [}q6bXM*
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