/* 3M[!N
**SiteFileFetch.java ?]_$Dcmx
*/ iL-(O;n
package NetFox; vc;$-v$&
import java.io.*; *v !9MU9[(
import java.net.*; he;dq)-e9
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public class SiteFileFetch extends Thread { Bu~]ey1
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SiteInfoBean siteInfoBean = null; //文件信息Bean =(j1rW!
long[] nStartPos; //开始位置 |6sp/38#p
long[] nEndPos; //结束位置 d;Ym=YHJtn
FileSplitterFetch[] fileSplitterFetch; //子线程对象 :^6y7&o[
long nFileLength; //文件长度 *K8$eDNZ
boolean bFirst = true; //是否第一次取文件 hd%Fnykq
boolean bStop = false; //停止标志 '}53f2%gKa
File tmpFile; //文件下载的临时信息 ?jv/TBZX4
DataOutputStream output; //输出到文件的输出流 $]/{[@5
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 5y.WMNNv{
public SiteFileFetch(SiteInfoBean bean) throws IOException ohGJ1
{ &
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siteInfoBean = bean; 4yy>jXDG
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); dd %6t
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); P9^Xm6QO
if(tmpFile.exists ()) q$d>(vbq
{ AUG#_HE]k
bFirst = false; EIP/V
read_nPos(); t6"%3#s
} X:"i4i[}{9
else ^1I19q
{ |.: q
nStartPos = new long[bean.getNSplitter()]; [6Izlh+D
nEndPos = new long[bean.getNSplitter()]; q_[o"wq/
} ]nn98y+
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} @alK;\
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public void run() HmGWht6R
{ oq
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//获得文件长度 Ju@c~Xm
//分割文件 EH J.T~X
//实例FileSplitterFetch g*AWE,%=|
//启动FileSplitterFetch线程 *aM=Z+
//等待子线程返回 ,q`\\d
try{ Xx~Bp+
if(bFirst) O m|_{
{ `KoV_2|
nFileLength = getFileSize(); "<N*"euH
if(nFileLength == -1) 8b&/k8i:
{ VPJElRSH
System.err.println("File Length is not known!"); DMr\ TN
} oWT3apGO
else if(nFileLength == -2) n:?a$Ldgm
{ Z"xvh81P
System.err.println("File is not access!"); r(TIw%L$
} q
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else A:%`wX}
{ rH Lm\3
for(int i=0;i<nStartPos.length;i++) &jJL"gq"
{ 6Pl<'3&
nStartPos = (long)(i*(nFileLength/nStartPos.length)); MAR'y8I
} Gx/Oi)&/
for(int i=0;i<nEndPos.length-1;i++) >y7?-*0
{ ~,Zc% s~|
nEndPos = nStartPos[i+1]; >1Ibc=}g
} E<Y$>uKA
nEndPos[nEndPos.length-1] = nFileLength; GR_-9}jQP
} `4J$Et%S
} K\Wkoi5
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//启动子线程 tX s\R(?T
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Se}c[|8
for(int i=0;i<nStartPos.length;i++) zY{A'<\O
{ 194)QeoFw
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), y dA8wL
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), A}9`S6 @@
nStartPos,nEndPos,i); v@L;x [Q
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); K($Npuu]
fileSplitterFetch.start(); r#p9x[f<Y
} aeJHMHFc
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), YK'<NE3 4
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); z>Y-fN`,
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", .|70;
nEndPos = " + nFileLength); |0b`fOS
// fileSplitterFetch[nPos.length-1].start(); i[3'ec3
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aB&&YlR=n<
//等待子线程结束 f}P3O3Yv&
//int count = 0; !*N@ZL&X
//是否结束while循环 4Z&lYLq;
boolean breakWhile = false; G5 WVr$
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while(!bStop) ^6V[=!& H
{ "ze|W\Bv!
write_nPos(); &j"?\f?
Utility.sleep(500); g}cq K
breakWhile = true; oD.Cs'
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for(int i=0;i<nStartPos.length;i++) ^hM4j{|&M
{ *.t7G
if(!fileSplitterFetch.bDownOver) Zb>? 8
{ <\^8fn
breakWhile = false; }Zn}
break; aX'*pK/-
} sDlO#
} aEeodA<(
if(breakWhile) Z@!+v19^
break; mz0X3
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//count++; <PH#[dH
//if(count>4) htF] W|z
// siteStop(); `M8i92V\qY
} ^u ~Q/4
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System.err.println("文件下载结束!"); W^l-Y%a/o
} &Ok):`
catch(Exception e){e.printStackTrace ();} oap4rHk}
} `d}2O%P
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//获得文件长度 x s|FE3:a
public long getFileSize() `X&gE,Ii
{ +cN8Y}V
int nFileLength = -1; .aQ \jA
try{ (O3nL.
URL url = new URL(siteInfoBean.getSSiteURL()); 2P0*NQ
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); F={a;Dvrn
httpConnection.setRequestProperty("User-Agent","NetFox"); @\#td5'
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int responseCode=httpConnection.getResponseCode(); (f"4,b^]
if(responseCode>=400) yY q,*<G
{ [{,1=AB
processErrorCode(responseCode); SO!8Di
return -2; //-2 represent access is error 2BwO!Y[
} SwMc
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String sHeader; vr=#3>
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for(int i=1;;i++) wFZP,fQ9l
{ &tj!*k'
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 4.t-i5
//Utility.log(in.readLine()); ^ [@,
sHeader=httpConnection.getHeaderFieldKey(i); /%^#8<=|U
if(sHeader!=null)
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{ N~'c_l
if(sHeader.equals("Content-Length")) >z@0.pN]7
{ c\j/k[\<
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); PEZ!n.'S
break; =UWI9M*sz
} WH^%:4
} =t?F6)Q
else EADqC>
break; w``U=sfmV
} {)sdiE
} _H@DLhH|=
catch(IOException e){e.printStackTrace ();} .7X^YKR
catch(Exception e){e.printStackTrace ();} sFRQe]zCcP
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Utility.log(nFileLength); r9?Mw06Wc5
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return nFileLength; TB31-
()
} ^U/O!GK
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//保存下载信息(文件指针位置) $[ *w"iQ
private void write_nPos() ,I;>aE<#
{ ;!Fn1|)
try{ ,eS)e+yzc2
output = new DataOutputStream(new FileOutputStream(tmpFile)); k+*u/neh
output.writeInt(nStartPos.length); x]j W<A
for(int i=0;i<nStartPos.length;i++) %8v\FS
{ xyXa .
// output.writeLong(nPos); 4^<?Wq~
output.writeLong(fileSplitterFetch.nStartPos); n+ M <\
output.writeLong(fileSplitterFetch.nEndPos); ]6j{@z?{
} C;yZ
output.close(); #GFr`o0$^
} @2i9n
catch(IOException e){e.printStackTrace ();} <:CkgR$/{
catch(Exception e){e.printStackTrace ();} ))Za&S*<
} 'V>-QD%1
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//读取保存的下载信息(文件指针位置) E"IZ6)Q
private void read_nPos() Dw"\/p:-3
{ 7zj{wp!
try{ nO-#Q=H,
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 'Pbr
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int nCount = input.readInt(); rPm x
nStartPos = new long[nCount]; yB!dp;gM{
nEndPos = new long[nCount]; ?e?!3Bx;EM
for(int i=0;i<nStartPos.length;i++) t_1LL >R
{ /x *3}oI
nStartPos = input.readLong(); 3XNCAb2
nEndPos = input.readLong(); DHRlWQox
} * v#o
input.close(); rvM {M/4
} nJ;.Td
catch(IOException e){e.printStackTrace ();} .6J$,.Ig
catch(Exception e){e.printStackTrace ();} cWm$;`Q#\
} # f\rt
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private void processErrorCode(int nErrorCode) 0n'_{\yz
{ G#$-1"!`
System.err.println("Error Code : " + nErrorCode); _yT Ed"$
} -G=]=f/'
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//停止文件下载 J[kTlHMD
public void siteStop() Dt1jW
{ 4I[P>
bStop = true; B<C&xDRZ0
for(int i=0;i<nStartPos.length;i++) \{D"
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fileSplitterFetch.splitterStop(); bI`g|v
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} )U#K
} ugBCBr
//负责部分文件的抓取 _"{Xi2@H
**FileSplitterFetch.java HVAYPerH
*/ {4PwLCy
package NetFox; 9tnD=A<PS
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import java.io.*; `GLx#=Q
import java.net.*; 1.>m@Slr>
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public class FileSplitterFetch extends Thread { @}ZVtrz
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String sURL; //File URL p
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long nStartPos; //File Snippet Start Position R|Q?KCI&
long nEndPos; //File Snippet End Position 8?C5L8)
int nThreadID; //Thread's ID 47B&s
boolean bDownOver = false; //Downing is over 5-A\9UC*@
boolean bStop = false; //Stop identical &nK<:^n
FileAccessI fileAccessI = null; //File Access interface ./~(7o$
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException S|}L &A
{
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this.sURL = sURL; i-&yH
this.nStartPos = nStart; t`QENXA}
this.nEndPos = nEnd; Bbp|!+KP{(
nThreadID = id; q cno^8R
fileAccessI = new FileAccessI(sName,nStartPos);//定位 LH6vLuf
} LIrb6g&xj_
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public void run() tf G@&&%9
{ fc@A0Hf
while(nStartPos < nEndPos && !bStop) &m vSiyKX
{ 048kPXm`
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try{ hv+zGID7
URL url = new URL(sURL); PI<vxjOK`
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [/ZO q
httpConnection.setRequestProperty("User-Agent","NetFox"); :hA#m[
String sProperty = "bytes="+nStartPos+"-"; ~)'k 9?0
httpConnection.setRequestProperty("RANGE",sProperty); Q@H V- (A
Utility.log(sProperty); Y\tui+?J
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InputStream input = httpConnection.getInputStream(); u= yOu^={
//logResponseHead(httpConnection); |cY`x(?yP
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byte[] b = new byte[1024]; \j.:3Xr
int nRead; @ .KGfNu
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) FPTK`Gd0
{ ?%kV?eu'
nStartPos += fileAccessI.write(b,0,nRead); 8XbT`y
//if(nThreadID == 1) S[QrS7
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); I2DpRMy
} J8~haim
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Utility.log("Thread " + nThreadID + " is over!"); A\;U3Zu
bDownOver = true; Wez5N
//nPos = fileAccessI.write (b,0,nRead); O'~+_ykTl
} hzC>~Ub5
catch(Exception e){e.printStackTrace ();} U;I9 bK8
} Aa]"
} t:c.LFrF
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//打印回应的头信息 L8n|m!MOD
public void logResponseHead(HttpURLConnection con) y_9Ds>p!T
{ 6zn5UW#q
for(int i=1;;i++) 5:Uso{
{ Qci]i)s$js
String header=con.getHeaderFieldKey(i); -{_PuJ "
if(header!=null) bjS{(
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 3mni>*q7d
Utility.log(header+" : "+con.getHeaderField(header)); Sx\]!B@DSu
else 59-c<I/}f
break; ,2)6s\]/b
} lys#G:H]
} &~w}_Fjk
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public void splitterStop() P
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{ $wU\Js`/S]
bStop = true; u2[w#
} A(0lM`X
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} _tXlF;
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/* 9g?(BI^z
**FileAccess.java s9d_GhT%-
*//文件访问(定位,写) ]9,;K;1<
package NetFox; FGQzoS
import java.io.*; v9UD%@tZ
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public class FileAccessI implements Serializable{ C8 \^#5
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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 JMM W
RandomAccessFile oSavedFile; bYPK h
long nPos; 'Z |mQZN
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public FileAccessI() throws IOException <