/* i7 *cpNPO
**SiteFileFetch.java '5V#sq;Z
*/ k2axGq
package NetFox; dF
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import java.io.*; Lc0yLm
import java.net.*; xW hi>
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public class SiteFileFetch extends Thread { Td|x~mZv:
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SiteInfoBean siteInfoBean = null; //文件信息Bean qYi<GI*|@
long[] nStartPos; //开始位置 ;R#:? r;t
long[] nEndPos; //结束位置 Q|3SYJf
FileSplitterFetch[] fileSplitterFetch; //子线程对象 @ -g'BvS
long nFileLength; //文件长度 k-~HUC.A.
boolean bFirst = true; //是否第一次取文件 |izf|*e
boolean bStop = false; //停止标志 LEM^8G]O
File tmpFile; //文件下载的临时信息 ptcG:
DataOutputStream output; //输出到文件的输出流 kVG]zt2
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) h3z=tu['
public SiteFileFetch(SiteInfoBean bean) throws IOException $hCPmiI
{ (l~3~n
siteInfoBean = bean; @X\2K?c(v
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); W;^bc*a_
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); XyM?Dc5,
if(tmpFile.exists ()) *,Mg
{ Z
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bFirst = false; :zL.dJwa
read_nPos(); 5[1#d\QR
} y
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else Q302!N
{ |>Xw"]b;
nStartPos = new long[bean.getNSplitter()]; '
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nEndPos = new long[bean.getNSplitter()]; guD?~-Q
} VB+sl2V<h
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} ]:Q7Gys
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public void run() kS>'6xXH
{ OoFQ@zE7%
//获得文件长度 $=97M.E
//分割文件 kRk=8^."By
//实例FileSplitterFetch @QAyXwp
//启动FileSplitterFetch线程 Wu
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//等待子线程返回 x+O}R D*G
try{ V zx%N.
if(bFirst) KAg<s}gQJ
{ [xXml On!
nFileLength = getFileSize(); 6g ,U+~
if(nFileLength == -1) $Xlyc.8YId
{ ,{C(<1
System.err.println("File Length is not known!"); GXEOgf#i
} /WDz;,X
else if(nFileLength == -2) cZRLYOC
{ Y[Gw<1F_
System.err.println("File is not access!"); RRD\V3C84
} ^"w.v' sL
else NLJD}{8Ot
{ n7vLw7
for(int i=0;i<nStartPos.length;i++)
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{ Bx&.Tj
nStartPos = (long)(i*(nFileLength/nStartPos.length)); J3sO%4sYR
} YkcX#>,
for(int i=0;i<nEndPos.length-1;i++) ;3n0 bKDY
{ }*n(RnCn
nEndPos = nStartPos[i+1]; 5L<}u`0J
} ?=<vC
nEndPos[nEndPos.length-1] = nFileLength; 6(4o}Sv
} YbC6&_
} &DX9m4,y
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//启动子线程 ?4
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fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; @j$tpz
for(int i=0;i<nStartPos.length;i++) [Cz.K?+#M
{ ~Exd_c9
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 1Tn!.E *
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), E<3hy
nStartPos,nEndPos,i); 3zb;q@JV
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); y+RT[*bX5o
fileSplitterFetch.start(); VI%879Z\e
} /Q"nQSG
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), M* W=v
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); o'Q)V
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ^zGgvFf>
nEndPos = " + nFileLength); " 7!K'i
// fileSplitterFetch[nPos.length-1].start(); ]lF'o&v]
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//等待子线程结束 H^Xw<Z=
//int count = 0; (
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//是否结束while循环 'uUp1+
boolean breakWhile = false; v@k62@;
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while(!bStop) )2oWoZvi9
{ |xH"Xvp:
write_nPos(); J`O4]XRY
Utility.sleep(500); 1!\!3xa V
breakWhile = true; )J_!ZpMC
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for(int i=0;i<nStartPos.length;i++) w\;=3C`
{ ?ZSG4La\
if(!fileSplitterFetch.bDownOver) &a8#qv"l
{ I
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breakWhile = false; `sN3iD!@R
break; w2~(/RgO
} o lNL|WJ`w
} UTUIL D
if(breakWhile) G=3/PYp
break; dv%gmUUf}k
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//count++; -3VxjycY
//if(count>4) VzpPopD,QW
// siteStop(); V#!ypX]AB[
} Ii*v(`2b
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System.err.println("文件下载结束!"); 5vYh~|
} "h7-nwm
catch(Exception e){e.printStackTrace ();} hC]c
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} jjvm<;lv
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//获得文件长度 P,iLqat
public long getFileSize() )X\.Xr-6q
{ 5DyN=[b
int nFileLength = -1; 5G){7]P+r"
try{ *^c4q|G.-
URL url = new URL(siteInfoBean.getSSiteURL()); v! @/
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ItKwB+my
httpConnection.setRequestProperty("User-Agent","NetFox"); 1elcP`N1
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int responseCode=httpConnection.getResponseCode(); )gR14a
if(responseCode>=400) Lj(hk@
{ )dF(5,y)
processErrorCode(responseCode); A>>@&c:(
return -2; //-2 represent access is error ]02 l!"
} 1y0.tdI(
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String sHeader; =JO|m5z8>
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for(int i=1;;i++) PBn(k>=+
{ (fh:q2E#
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ());
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//Utility.log(in.readLine());
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sHeader=httpConnection.getHeaderFieldKey(i); <mY`<(bc
if(sHeader!=null) 83i%3[L
{ N>ct`a)BD/
if(sHeader.equals("Content-Length")) 5B2x#
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{ bHS2;K~
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); K!I]/0L
break; `yYgL@Zt
} dN |w;|M
} //ZB B,[@
else GeHDc[7
break; >+vWtO2
} :1 Fm~'
} B"KsYB79t
catch(IOException e){e.printStackTrace ();} *$#r%
catch(Exception e){e.printStackTrace ();} 9d[0i#` :q
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Utility.log(nFileLength); <u2*(BM4
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return nFileLength; & p_;&P_
} ` V^#Sb
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//保存下载信息(文件指针位置) RX2=
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private void write_nPos() "bf8[D
{ n+Ag |.,|
try{ <*(~x esPS
output = new DataOutputStream(new FileOutputStream(tmpFile)); p+8]H
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output.writeInt(nStartPos.length); 7vj[ AOq3l
for(int i=0;i<nStartPos.length;i++) f6|3|
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{ iU%Gvf^?'5
// output.writeLong(nPos); !+hX$_RT
output.writeLong(fileSplitterFetch.nStartPos); VpVw:Rh>
output.writeLong(fileSplitterFetch.nEndPos); huKz["]z[
} p*npY"}v
output.close(); YSa:"A
} "BFW&<1
catch(IOException e){e.printStackTrace ();} [tD*\\IA
catch(Exception e){e.printStackTrace ();} iBo-ANnK9
} Uw&+zJ
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//读取保存的下载信息(文件指针位置) ~:t2@z4p
private void read_nPos() p\-.DRwT`
{ oC7#6W:@w
try{ _ZS<zQ'
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); A+F-r_]}db
int nCount = input.readInt(); yPQ{tS*t
nStartPos = new long[nCount]; q!ZmF1sU
nEndPos = new long[nCount]; ]#:xl}'LS
for(int i=0;i<nStartPos.length;i++) w
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{ 1|.
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nStartPos = input.readLong(); +z[!]^H]4
nEndPos = input.readLong(); .<NXk"\!y
} qFs<s<]
input.close(); =~0XdS/1
} YD+C1*c!
catch(IOException e){e.printStackTrace ();} YKx0Zs
catch(Exception e){e.printStackTrace ();} [ThzLk#m
} hPk+vvXtK
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private void processErrorCode(int nErrorCode) @B^'W'&C
{ ]yIy~V
System.err.println("Error Code : " + nErrorCode); wlpbfO e/
} ):|)/ZiC'
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//停止文件下载 u?J(l)gd
public void siteStop() CD tYj
{ \) #3S $L~
bStop = true; &qpA<F@7
for(int i=0;i<nStartPos.length;i++) 3+$O#>
fileSplitterFetch.splitterStop(); 8/F2V?iT
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} $U0(%lIU
} MnS"M[y3
//负责部分文件的抓取 @'rO=(-b
**FileSplitterFetch.java % (.PRRI
*/ 3PEs$m9e
package NetFox; }GC{~
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import java.io.*; ibAA:I,d
import java.net.*; d{trO;%#f
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public class FileSplitterFetch extends Thread { v6n(<0:
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String sURL; //File URL A+l"
long nStartPos; //File Snippet Start Position s-ou ;S3s
long nEndPos; //File Snippet End Position A^Zs?<C-
int nThreadID; //Thread's ID &p%c tg
boolean bDownOver = false; //Downing is over K@,VR3y /
boolean bStop = false; //Stop identical fE:2MW!)*
FileAccessI fileAccessI = null; //File Access interface [5 V
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException <>:kAT,sP
{ Xm-63U`w5
this.sURL = sURL; zKutx6=aj
this.nStartPos = nStart; 51,m^veO
this.nEndPos = nEnd; Ii8jY_
nThreadID = id; dkLR
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fileAccessI = new FileAccessI(sName,nStartPos);//定位 *,pqpD>
} h`Mf;'P
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public void run() 7.t$#fzi
{ wf4Q}l2,d
while(nStartPos < nEndPos && !bStop) F)IP~BE-k
{ Uoe?5Of(*
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try{ f1{ckHAY55
URL url = new URL(sURL); DI RCP=5
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <f6Oj`{f4
httpConnection.setRequestProperty("User-Agent","NetFox"); O`=Uq0Vv
String sProperty = "bytes="+nStartPos+"-"; )?WoLEjq
httpConnection.setRequestProperty("RANGE",sProperty); U_~~PCi
Utility.log(sProperty); f,#xicSB*
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InputStream input = httpConnection.getInputStream(); )'g vaT
//logResponseHead(httpConnection); >xjy
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byte[] b = new byte[1024]; T,fz/5w
int nRead; z|2liQrf+
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ]3C8
{ 'FhnSNT(4=
nStartPos += fileAccessI.write(b,0,nRead); iiTUhO )
//if(nThreadID == 1) ]*|K8&jxl
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8f.La
} ?1uAY.~ZZB
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Utility.log("Thread " + nThreadID + " is over!"); _biJch
bDownOver = true; D/WS
//nPos = fileAccessI.write (b,0,nRead); {JgN^R<5<f
} OOCeZ3yF(
catch(Exception e){e.printStackTrace ();} &}cie"\L
} DbN'b(+
} (AYD@
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//打印回应的头信息 H.L@]~AyL
public void logResponseHead(HttpURLConnection con) `{Jb{L@f
{ 0FOf *Lz
for(int i=1;;i++) ?MH4<7?"
{ )YFs
String header=con.getHeaderFieldKey(i); 1%,Z&@^j
if(header!=null) =+p+_}C
//responseHeaders.put(header,httpConnection.getHeaderField(header)); y6/X!+3+
Utility.log(header+" : "+con.getHeaderField(header)); CkU=0mcY
else : [y(<TLw
break; m"R(_E5
} g8Z14'Ke
} Eg*3**gTO
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public void splitterStop() >$DqG$D
{
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bStop = true; ZAZCvN@5
} +$t%L
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} }U9jsm
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/* dK: "
**FileAccess.java e`r;`a&
*//文件访问(定位,写) {P&^Erx
package NetFox; o2
import java.io.*; wY#mL1dF
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public class FileAccessI implements Serializable{ `Tj}4f
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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 7VcVI? ?
RandomAccessFile oSavedFile; n^N]iw{G
long nPos; M-N2>i#
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public FileAccessI() throws IOException (, "E9.
{ $8k_M
this("",0); keskD
} NrcCUZ .:N
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public FileAccessI(String sName,long nPos) throws IOException \BXVWE|
{ or}*tSKX
oSavedFile = new RandomAccessFile(sName,"rw"); de9l;zF
this.nPos = nPos; Z@!W?Ed
oSavedFile.seek(nPos); I&8m5F?$`
} I})t
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public synchronized int write(byte[] b,int nStart,int nLen) @88i/ Z_
{ Ky#B'Bh}`g
int n = -1; t[hocl/6
try{ on?/tHys
oSavedFile.write(b,nStart,nLen); +E|ouFI
n = nLen; 9^ p{/Io
} |+-i'N9
catch(IOException e) RWCS
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{ &pjV4m|j<
e.printStackTrace (); ~aAJn IO
} Y,btL'[W
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return n; o'/C$E4W
} I^(#\vRW
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} ?3TV:fx"X
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/* W'h0Zg
**SiteInfoBean.java uhB!k-ir
*/ n~u3
package NetFox; J+jmSK%z
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public class SiteInfoBean { PMhhPw]
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private String sSiteURL; //Site's URL ;+34g6
private String sFilePath; //Saved File's Path ^z}lGu
private String sFileName; //Saved File's Name u#WTh%/
private int nSplitter; //Count of Splited Downloading File 917 0bmr
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public SiteInfoBean() QM_X2Ho
{//nSplitter的缺省值为5 [ 5
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//default value of nSplitter is 5 P3tG#cJ
this("","","",5); U!?gdX
} 5}bZs` C
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) [[]SkLZHg
{
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sSiteURL= sURL; gT&