/* 98uV6b~g
**SiteFileFetch.java aD=A^ktx
*/ j ~1B|,H
package NetFox; *rIk:FehLB
import java.io.*; ;3B1_vo9
import java.net.*; NqDHCI
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public class SiteFileFetch extends Thread { ~e+\k>^eN
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SiteInfoBean siteInfoBean = null; //文件信息Bean c0;t4(
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long[] nStartPos; //开始位置 'VlDh`<W
long[] nEndPos; //结束位置 4:dH]
FileSplitterFetch[] fileSplitterFetch; //子线程对象 q&W[j5E
long nFileLength; //文件长度 (}EB2V9Hh
boolean bFirst = true; //是否第一次取文件 L.jh
boolean bStop = false; //停止标志 XbD4:i%
File tmpFile; //文件下载的临时信息 ^`)) C;
DataOutputStream output; //输出到文件的输出流 &iA?+kV
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) RH O( ?8"_
public SiteFileFetch(SiteInfoBean bean) throws IOException Pl"Nus
{ s0k`p<q
siteInfoBean = bean; n1VaLD
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); qT`k*i?
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); %Ntcvp)
if(tmpFile.exists ()) N#DYJ-~*
{ &'
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bFirst = false; b;cdIl!3
read_nPos(); C0}IE,]
} bdF.qO9
else -/ g B|J
{ CJJzCVj
nStartPos = new long[bean.getNSplitter()]; :QB<?HaS'
nEndPos = new long[bean.getNSplitter()]; 17G'jiYH
} TTt#a6eJ
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} Dm-zMCf}Q
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public void run() Te}8!_ohyC
{ fDvl/|62{
//获得文件长度 EodQ*{l
//分割文件 '{V0M<O
//实例FileSplitterFetch j{9D{
//启动FileSplitterFetch线程 nAjO6g6E
//等待子线程返回 [`rba'
try{ Q^e}?v%=%3
if(bFirst) Y<Fz)dQo
{ 6T#+V37
nFileLength = getFileSize(); -Ty*aov
if(nFileLength == -1) lS'-xEv?
{ al9t^
System.err.println("File Length is not known!"); NH<5*I/
} _q{c##Kf
else if(nFileLength == -2) <\pfIJr$
{ t<|NLk.
System.err.println("File is not access!"); MgNU``
} 6Qy@UfB
else pt?q#EfFJ
{ UmclTGn
for(int i=0;i<nStartPos.length;i++) (r D_(%o
{ yGPS`S
nStartPos = (long)(i*(nFileLength/nStartPos.length)); ^]a #7/]o
} }0X:F`Y-
for(int i=0;i<nEndPos.length-1;i++) "0cID3A$
{ ek}a}.3 {
nEndPos = nStartPos[i+1]; Wu_kx2h
} 9)gC6IiW
nEndPos[nEndPos.length-1] = nFileLength; L G1r]2
} \8 h;K>=h
} eK!V
);
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//启动子线程 )_i
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fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ?Vdia:
for(int i=0;i<nStartPos.length;i++) YGPy@-,E
{ 5wh|=**/
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (C@~3!AVa
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), dOoK Lry
nStartPos,nEndPos,i); -cSP_1
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); hijgF@
fileSplitterFetch.start();
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} vOc 9ZE
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), '_/Bp4i
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); fmiz,$O4?
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", x>* Drm 7
nEndPos = " + nFileLength); qAS qscO
// fileSplitterFetch[nPos.length-1].start(); uec!RKE
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//等待子线程结束 ,eZ1uBI?
//int count = 0; D*F4it.
//是否结束while循环 D6Goa(!9d
boolean breakWhile = false; eQD)$d_5
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while(!bStop) 0Emr<n
{ q"<ac qK
write_nPos(); F>-B3x
Utility.sleep(500); .G)(0z("s
breakWhile = true; -:Ia^{YN
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for(int i=0;i<nStartPos.length;i++) /`6ZAom9
{ "gne_Ye.
if(!fileSplitterFetch.bDownOver) g)_e]&
{ |*'cF-lp6v
breakWhile = false; MF'$~gxo
break; t$xY #:
} ghX|3lI\q
} krC{ed
if(breakWhile) Y<Xz
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break; r]l!WRn
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//count++; l#H#+*F
//if(count>4) E gal4
// siteStop(); ""1^k2fj
} CFqJ/''
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System.err.println("文件下载结束!"); 1!1beR]
} &b?LP]
catch(Exception e){e.printStackTrace ();} ALNc'MW!
} -Gw$#!
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//获得文件长度 5K<5kHpvJ{
public long getFileSize() ni6{pK4Wqm
{ zSSB>D
int nFileLength = -1; ?I[8'
try{ .Y3pS/VI
URL url = new URL(siteInfoBean.getSSiteURL()); z(fAnn
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HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); +S R+x/?z
httpConnection.setRequestProperty("User-Agent","NetFox"); z[cyA.
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int responseCode=httpConnection.getResponseCode(); 9XRZ$j}L
if(responseCode>=400) N^pJS6cJkl
{ <oWB0%
processErrorCode(responseCode); DWID$w
return -2; //-2 represent access is error &/uu)v
} t@R
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String sHeader; *r=:y{!Y d
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for(int i=1;;i++) YQpSlCCo
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{ h~p>re
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 7G\\{
//Utility.log(in.readLine()); )EL!D%<A
sHeader=httpConnection.getHeaderFieldKey(i); >layJt
if(sHeader!=null) +> WM[o^I
{ =Uj-^qcE
if(sHeader.equals("Content-Length")) "v`
{ z j/!In
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ~5 *5
break; wQiX<)O
} #SX8=f`K5
} rN%F)
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else 7hi"6,
break; AN24Sf'`
} K)-m*#H&uw
} xw3YK!$sIF
catch(IOException e){e.printStackTrace ();} 6X\ 2GC9
catch(Exception e){e.printStackTrace ();} 7\9>a
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Utility.log(nFileLength); L
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return nFileLength; sL@U
} sPps q
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//保存下载信息(文件指针位置) 0%Z]h?EYy|
private void write_nPos() u&9 r2R959
{ ]\xy\\b/`
try{ ]_8qn'7
output = new DataOutputStream(new FileOutputStream(tmpFile)); i@B[ eta
output.writeInt(nStartPos.length); q-`RI*1]
for(int i=0;i<nStartPos.length;i++) KrXdnY8
{ Ai/b\:V9S
// output.writeLong(nPos); wo3wtx
output.writeLong(fileSplitterFetch.nStartPos); pFm=y#!t
output.writeLong(fileSplitterFetch.nEndPos); $ KRI'4
} y8 KX<2s1
output.close(); r.T<j.\
} c1_5, 1U'
catch(IOException e){e.printStackTrace ();} ;]w<&C!=
catch(Exception e){e.printStackTrace ();} ]a!xUg!S
} 1|?05<8
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//读取保存的下载信息(文件指针位置) c=
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private void read_nPos() qt3PXqR7:
{ %rF?dvb;?
try{ {XWZ<OjG
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); k~/>b~.c
int nCount = input.readInt(); UTSL
nStartPos = new long[nCount]; J8"[6vI d~
nEndPos = new long[nCount]; 1=nUW":
for(int i=0;i<nStartPos.length;i++) 0V{(Ru.O
{ .(X
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nStartPos = input.readLong(); ]/!<PF
nEndPos = input.readLong(); 1$2D O
} X5]TY]
input.close(); \y88d4zX
} Fk6x<^Q<w
catch(IOException e){e.printStackTrace ();} 8UMFq
catch(Exception e){e.printStackTrace ();} *5wu
} e{A9r@p!
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private void processErrorCode(int nErrorCode) [ G
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{ s
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System.err.println("Error Code : " + nErrorCode); 1O!/g
} DEw8*MN
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//停止文件下载 V=X:=
public void siteStop() ; h`0ir4[A
{ qA:#iJ8w
bStop = true; O0:)X)b
for(int i=0;i<nStartPos.length;i++) ~-#yOu
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fileSplitterFetch.splitterStop(); k` {@pt.
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} ZKz,|+X0G
} ?6k}ii!c
//负责部分文件的抓取 -@F fU2
**FileSplitterFetch.java `?y<>m*
*/ -3&G"hfK
package NetFox; M^7MU}5w
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import java.io.*; jr /lk
import java.net.*; $v`afd y
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public class FileSplitterFetch extends Thread { jS!`2li?{
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String sURL; //File URL e*
long nStartPos; //File Snippet Start Position om3`[r[{
long nEndPos; //File Snippet End Position }%-t+Tf,
int nThreadID; //Thread's ID ;@nFVy>U
boolean bDownOver = false; //Downing is over $LHa?3
boolean bStop = false; //Stop identical ]O
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FileAccessI fileAccessI = null; //File Access interface G\;}w
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException E"|4Y(G
{ $2MAZGJV
this.sURL = sURL; '>k{tPi.
this.nStartPos = nStart; Dw2Q 'E
this.nEndPos = nEnd; \@~UDP]7
nThreadID = id; (5<^p&
fileAccessI = new FileAccessI(sName,nStartPos);//定位 ==H$zmK
} ZCVl5R(mZ
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public void run() +-a&2J;J'
{ ,SScf98,j
while(nStartPos < nEndPos && !bStop) u=&Bmn_
{ D%7kBfCb
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try{ :o=[Zp~B4d
URL url = new URL(sURL); m"NZ; *d '
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |nB2X;K5~
httpConnection.setRequestProperty("User-Agent","NetFox"); \DpXs[1
String sProperty = "bytes="+nStartPos+"-"; 8hGp?Ihu
httpConnection.setRequestProperty("RANGE",sProperty); u3Ua>A-
Utility.log(sProperty);
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InputStream input = httpConnection.getInputStream(); G=(F-U;*
//logResponseHead(httpConnection); rj<r6
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byte[] b = new byte[1024]; 2?#IwT'
int nRead; nJlrBf_Kj
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) rE EWCt
{ hQvSh\p
nStartPos += fileAccessI.write(b,0,nRead); "^yTH/m
//if(nThreadID == 1) g*TAaUs|n
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6;k#|-GU&
} $s$z"<
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Utility.log("Thread " + nThreadID + " is over!"); '*|Wi}0R
bDownOver = true; 4l560Fb'U
//nPos = fileAccessI.write (b,0,nRead); L@XhgQ
} b&. o9PV"
catch(Exception e){e.printStackTrace ();} /X{:~*.z
} `XS6t)!ik
} UJ<eF/KSmG
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//打印回应的头信息 Tt<Ry'Z$3
public void logResponseHead(HttpURLConnection con) ](vOH#E
{ 1^TOTY
for(int i=1;;i++) .|;`qUo
{ x~rIr#o
String header=con.getHeaderFieldKey(i); }mzM'9JH
if(header!=null) tgKmCI
//responseHeaders.put(header,httpConnection.getHeaderField(header)); TeSF
Utility.log(header+" : "+con.getHeaderField(header)); |/5j0
else HI*xk
break; |]w0ytL>(2
} {=VauF
} :%~+&qS
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public void splitterStop() 17
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{ q4C$-W%rj
bStop = true; HNu/b)-Rb
} <p;cR` %uE
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} 18jI6$DY
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/* p(fYpD
**FileAccess.java S;[9
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*//文件访问(定位,写) (hEqh
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package NetFox; ?kMG!stgp}
import java.io.*; iqW
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public class FileAccessI implements Serializable{ Ii_X^)IL(
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 BrcT`MM[(=
RandomAccessFile oSavedFile; I"eXoqh
long nPos; rZm|7A)i
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{ AdPC?R`
public FileAccessI() throws IOException tG+ E'OP
{ )o-rg
this("",0); j?K]0j;
} `VM@-;@w
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public FileAccessI(String sName,long nPos) throws IOException Z<T%:F
{ /"Ws3.p
oSavedFile = new RandomAccessFile(sName,"rw"); q^ lx03
this.nPos = nPos; WB<_AIt+
oSavedFile.seek(nPos); ?]+{2&&$
} v0&E!4q*'
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public synchronized int write(byte[] b,int nStart,int nLen) [xXa3W
{ ="hh=x.5J
int n = -1; 8T6.Zhv
try{ bR"hl? &c
oSavedFile.write(b,nStart,nLen); p}_n
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n = nLen; ~Q}JC3f>
} xFvDKW)_X7
catch(IOException e) 7m3|2Qv
{ T>,3V:X
e.printStackTrace (); +MU|XT_5|6
} aUUr&yf_L
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return n; 1D159 NLB
} 3}V`]B#a
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} GAG=4g
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/* DdJ>1504
**SiteInfoBean.java Wm! lWQu7
*/ RQiGKz5
package NetFox; ,w&8 &wj
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public class SiteInfoBean { |eH>55 b
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private String sSiteURL; //Site's URL NGZEUtj
private String sFilePath; //Saved File's Path R+,eX jz"
private String sFileName; //Saved File's Name m:U.ao6
private int nSplitter; //Count of Splited Downloading File gw[\7
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public SiteInfoBean() 9ReH@5_bGM
{//nSplitter的缺省值为5 Sz4G,c
//default value of nSplitter is 5 g_ 'F(An
this("","","",5); r,F~Vwa}
} yM}b
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