/* nPcxknl(pd
**SiteFileFetch.java <c(&T<$
*/ OgQntj:%lN
package NetFox; 9lKRL'QR
import java.io.*; }|SIHz!R
import java.net.*; 6-ti Rk~
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public class SiteFileFetch extends Thread { z+ uL "PG[
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SiteInfoBean siteInfoBean = null; //文件信息Bean & \JLTw
long[] nStartPos; //开始位置 r1+c/;TpZ
long[] nEndPos; //结束位置 9uKOR7.zbo
FileSplitterFetch[] fileSplitterFetch; //子线程对象 D/e&7^iK
long nFileLength; //文件长度 dV)Y,Yx0${
boolean bFirst = true; //是否第一次取文件 =,O/,2)
boolean bStop = false; //停止标志 )dqR<)
File tmpFile; //文件下载的临时信息 c5<kbe
DataOutputStream output; //输出到文件的输出流 1]Gf)|
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) !;TR2Zcn
public SiteFileFetch(SiteInfoBean bean) throws IOException `(P
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{ $y8mK|3.3u
siteInfoBean = bean; &ycjSBK
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 0T(O'v}.
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); E1#H{)G
if(tmpFile.exists ()) K4_~ruhr
{ N`f!D>b:dn
bFirst = false; Rq"VB.ef&{
read_nPos(); FMoJ"6Q
} Ih(:HFRMq6
else $|rCrak;
{ ={\![{L
nStartPos = new long[bean.getNSplitter()]; DE5d]3B
nEndPos = new long[bean.getNSplitter()]; z'?SRK5+
} kea e.6[
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} BQ).`f";d
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public void run() ^g}L`9fL
{ rFf:A-#l
//获得文件长度 hJecCOA)'
//分割文件 >9 q]>fJ
//实例FileSplitterFetch G!nl'5|y
//启动FileSplitterFetch线程 mp!YNI
//等待子线程返回 3Wjq >\
try{ km9Gwg/zT
if(bFirst) 5BrU'NF
{ lq~GcM
nFileLength = getFileSize(); B.V?s,U
if(nFileLength == -1) t-'I`I
{ izXbp02
System.err.println("File Length is not known!"); ${wU+E*
} Y,3z-Pa=@
else if(nFileLength == -2) u9esdOv
{ `Q:de~+AM{
System.err.println("File is not access!"); H~~7~1"x
} u
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else z`c%?_EK
{ 0PYvey }[
for(int i=0;i<nStartPos.length;i++) G%xb0%oi]%
{ 2O?Vr"
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); g7.7E6%H
} =n> iQS
for(int i=0;i<nEndPos.length-1;i++) =AWX
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{ H0: iYHu
nEndPos = nStartPos[i+1]; np<f,
} [Bl
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nEndPos[nEndPos.length-1] = nFileLength; E~'q?LJOB
} 6\; 4
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} ;M%oQ>].[
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//启动子线程 .}IK}A/-
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; pem3G5
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for(int i=0;i<nStartPos.length;i++) `,F&y{A
{ Q%M'[L?[
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), + ")qi=
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), {DKXn`V
nStartPos,nEndPos,i); <C7M";54-
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
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fileSplitterFetch.start(); ioE66-n
} +)/Rql(lY
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 08TaFzP81
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); !!?+M @
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Y|{r
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nEndPos = " + nFileLength); -ET*M<
// fileSplitterFetch[nPos.length-1].start(); $=e&q
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//等待子线程结束 \_m\U.*
//int count = 0; .V5q$5j
//是否结束while循环 ib5;f0Qa
boolean breakWhile = false; oV0LJ%
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while(!bStop) #6Efev
{ _n-VgPRn
write_nPos(); 3q~":bpAp
Utility.sleep(500); P!`Q_h6a
breakWhile = true; 37j\D1Y
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for(int i=0;i<nStartPos.length;i++) F&W0DaH
{ .ujs`9d_-
if(!fileSplitterFetch.bDownOver) \_*?R,$3Y,
{ /3CHE8nSh
breakWhile = false; 4kW30Ma
break; wx]+*Lzz
} 8ktjDs$=.:
} A}>|tm7|
if(breakWhile) )64LKb$
break; HGP%a1RF#
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//count++; fZka%[B
//if(count>4) Wo:zU
// siteStop(); otmIu` h
} b
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System.err.println("文件下载结束!"); <GL}1W"Ay
} ^%K1R;
catch(Exception e){e.printStackTrace ();} ;,F-6RNj
} 8]cv &d1f
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//获得文件长度 ImUQ*0
public long getFileSize() "4Vi=* 2V
{ p6&LZ=tL3
int nFileLength = -1; hYP6z^
try{ SeRK7Q&_
URL url = new URL(siteInfoBean.getSSiteURL()); ,_"7|z wb
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~6@c]:
httpConnection.setRequestProperty("User-Agent","NetFox"); D-TNFYYy2
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int responseCode=httpConnection.getResponseCode(); #hy5c,}>
if(responseCode>=400) ugIm:bg&
{ 38x[Ad4%
processErrorCode(responseCode); ^D]7pe
return -2; //-2 represent access is error 9[t]]
} ({d,oU$>y
dvg;
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String sHeader; GsP@ B'
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for(int i=1;;i++) }<5\O*kX4
{ b:}wR*Adc
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); bik] JIM
//Utility.log(in.readLine()); dUsJv
sHeader=httpConnection.getHeaderFieldKey(i); /?.r!Cp
if(sHeader!=null) 2-"Lxe65f
{ |!4BWt
if(sHeader.equals("Content-Length")) G<">/_jn
{ z{D$~ ob
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); G:h;C].
break; ~# h E&nq
} )E[
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} M\Uc;:) H
else 2HvTM8
break; +H)!uLvaB
} ~n8Oyr
} :w
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catch(IOException e){e.printStackTrace ();} {|Mxvp*Hg
catch(Exception e){e.printStackTrace ();} xoz*UA.
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Utility.log(nFileLength); =#POMK".6
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return nFileLength; fJF8/IQ4
} V\k5h
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//保存下载信息(文件指针位置) 26('V `N
private void write_nPos() ,{`o/F/
{ t(z(-G|&
try{ cjy0s+>>
output = new DataOutputStream(new FileOutputStream(tmpFile)); bbQ10H
output.writeInt(nStartPos.length); Sq?6R}q%
for(int i=0;i<nStartPos.length;i++) >n$EeJ
{ IxEQh)J X
// output.writeLong(nPos); ?v )"%.
output.writeLong(fileSplitterFetch.nStartPos); $X.'W\o|
output.writeLong(fileSplitterFetch.nEndPos); hIzPy3
} %~B)~|h
output.close(); \0*yxSg,^
} QRg"/62WCD
catch(IOException e){e.printStackTrace ();} /\3XARt
catch(Exception e){e.printStackTrace ();} `F-Dd4B
} \K_!d]I {
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//读取保存的下载信息(文件指针位置) VxPTh\O*[
private void read_nPos() Y00i{/a 8
{ bAy5/G!_R
try{ ?VOs:sln
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); nI|Lx`*v
int nCount = input.readInt(); =AnZ>6
nStartPos = new long[nCount]; c~0VNuN
nEndPos = new long[nCount]; eHnei F
for(int i=0;i<nStartPos.length;i++) "u,~yxYWl
{ 5EV8zf
nStartPos = input.readLong(); <Hr@~<@~
nEndPos = input.readLong(); 3*2&Fw!B
} {Gb)Et]<
input.close(); gk_X u
} &>) `P[x
catch(IOException e){e.printStackTrace ();} A\PV@w%Ai
catch(Exception e){e.printStackTrace ();} R^u^y{ohr
} sxC{\iLY%
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private void processErrorCode(int nErrorCode) 5f`XFe$8
{ NM.f0{:cj
System.err.println("Error Code : " + nErrorCode); ^kR^
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} {'wU&!
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//停止文件下载 {</$ObK
public void siteStop() )S;Xy`vO
{ `w+9j-
bStop = true; 3sg)]3jm2
for(int i=0;i<nStartPos.length;i++) _I70qz8
fileSplitterFetch.splitterStop(); KxTYc
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} T=p}By3a
} ~E6+2t*
//负责部分文件的抓取 @Qsg.9N3K
**FileSplitterFetch.java :PjUl
*/ G'}_ZUy#
package NetFox; &LxzAL,3!
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import java.io.*; [q+39
import java.net.*; !#|fuOWe
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public class FileSplitterFetch extends Thread { 4z3$
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String sURL; //File URL :;#}9g9
long nStartPos; //File Snippet Start Position w-Q 6
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long nEndPos; //File Snippet End Position `_{'?II
int nThreadID; //Thread's ID WO*WAP)n
boolean bDownOver = false; //Downing is over -{amzyvLE
boolean bStop = false; //Stop identical me`$5Z`
FileAccessI fileAccessI = null; //File Access interface [;LPeO
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Ug'nr
{ uu/7Ie
this.sURL = sURL; 0@/E%T1c"
this.nStartPos = nStart; .STf
this.nEndPos = nEnd; NwuBe:"@
nThreadID = id; (lck6v?h
fileAccessI = new FileAccessI(sName,nStartPos);//定位 PQ#-.K
} ,c %gwzU
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public void run() ^l2d?v8
{ ;@-5lCvC(+
while(nStartPos < nEndPos && !bStop)
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{ 9DAwC:<r
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try{ Eq.zCD8A
URL url = new URL(sURL); nhxd
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); K[;,/:Y
httpConnection.setRequestProperty("User-Agent","NetFox"); LUVJ218p
String sProperty = "bytes="+nStartPos+"-"; D~?*Xv]s~
httpConnection.setRequestProperty("RANGE",sProperty); ZZJ"Ny.2
Utility.log(sProperty); YZtA:>;p
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InputStream input = httpConnection.getInputStream(); #K*q(ei,7h
//logResponseHead(httpConnection); ]x{ H
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byte[] b = new byte[1024]; #"YWz)8
int nRead; H9m2Whq
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ?-v?SN#
{ I:)#U[tn0
nStartPos += fileAccessI.write(b,0,nRead); >oYwzK0&
//if(nThreadID == 1) $[;eb,
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); \J
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} F88SV6
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Utility.log("Thread " + nThreadID + " is over!"); .{ L m
bDownOver = true; 3'uES4+r
//nPos = fileAccessI.write (b,0,nRead); Z"nuO\zH~
} DQXx}%Px
catch(Exception e){e.printStackTrace ();} 7Ki7N{Kt
} m64\@
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} ]`U?<9~Ob
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//打印回应的头信息 0# GwhB
public void logResponseHead(HttpURLConnection con) J-?(sjIX
{ %Ne>'252y
for(int i=1;;i++) Mo
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{ #`wfl9tj
String header=con.getHeaderFieldKey(i); R.$Y1=U6
if(header!=null) D"aQbQP
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 6j![m+vo%
Utility.log(header+" : "+con.getHeaderField(header)); WoR**J?}w
else 5 :>
break; v333z<<S
} I9&<:`
} / UBAQ8TR
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public void splitterStop() J=bOw//
{ dL"i\5#%A
bStop = true; "2j~3aWj
} vv_?ip:t
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} pDN,(Ip
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/* ho<#i(
**FileAccess.java nXW1 :
*//文件访问(定位,写) ]&BFV%kw
package NetFox; 3Or3@e5r
import java.io.*; b=go"sJ@>(
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public class FileAccessI implements Serializable{ ^<b.j.$<z
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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 5lY9
RandomAccessFile oSavedFile; KwyXM9h6=
long nPos; M,lu)~H
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public FileAccessI() throws IOException J#nEGl|a
{ SjU6+|l
this("",0); m8`A~
} 1 crjRbi
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public FileAccessI(String sName,long nPos) throws IOException 8b
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{ .=D6<4#t
oSavedFile = new RandomAccessFile(sName,"rw"); :v48y.Ij7s
this.nPos = nPos; ;W:Q}[
oSavedFile.seek(nPos); 7%WI
} O;tn5
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public synchronized int write(byte[] b,int nStart,int nLen) >
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{ m 9Q{)?J7
int n = -1; CiFbk&-g
try{ Ha\ hQ'99
oSavedFile.write(b,nStart,nLen); Rh^$0Q*2
n = nLen; 2|EoP-K7
} ]e9kf$'
catch(IOException e) I}{eYXh
{ 0U~JSmj:2K
e.printStackTrace (); }%|OnEk"
} <9vkiEo
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return n; ~a Rq\fx{
} Ja2.1v|r.
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} wVB8PO8
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/* a!.8^:B&
**SiteInfoBean.java XO>Y*7rO
*/ *QJ/DC$
package NetFox; Pr"ESd>Y
qKXn=J/0tA
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public class SiteInfoBean { v%w]Q B
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private String sSiteURL; //Site's URL a1&^P1.
private String sFilePath; //Saved File's Path hCrgN?Mz
private String sFileName; //Saved File's Name 7tQiKrhp
private int nSplitter; //Count of Splited Downloading File LgYzGlJp
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public SiteInfoBean() X;0@41t'
{//nSplitter的缺省值为5 /:)4tIV
//default value of nSplitter is 5 *@Z'{V\
this("","","",5); oc3/
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} ]0O$2 j_ 7
}#1{GhsS
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) bBf+z7iyc
{ |m%&Qb
sSiteURL= sURL; TfOZ>uR"g
sFilePath = sPath; O_q_O
sFileName = sName; s&l[GKR
this.nSplitter = nSpiltter; +J}M$eQ
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} :0l(Ll KD
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