/* l(;Kij
**SiteFileFetch.java 'Gl&Pa1g?
*/ `R"~v/x
package NetFox; jYRP8 Yi
import java.io.*; :9|\Z|S(I
import java.net.*; _oG&OJ@
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public class SiteFileFetch extends Thread { g[H',)A)
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SiteInfoBean siteInfoBean = null; //文件信息Bean as*4UT3
long[] nStartPos; //开始位置 -=`#fDvBn
long[] nEndPos; //结束位置 0@I S
FileSplitterFetch[] fileSplitterFetch; //子线程对象 F@ Swe
long nFileLength; //文件长度 (wRgus
boolean bFirst = true; //是否第一次取文件 S35~Cp
boolean bStop = false; //停止标志 .8(OT./
File tmpFile; //文件下载的临时信息 {vEOn-(7
DataOutputStream output; //输出到文件的输出流 m_+sR!\H8
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) F+m }#p
public SiteFileFetch(SiteInfoBean bean) throws IOException H@bf'guA|B
{ nKa$1RMO
siteInfoBean = bean; 2*w0t:Yxe
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Dre2J<QL
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); z2_6??tS/c
if(tmpFile.exists ()) $5x ,6[&
{ eI45PMP
bFirst = false; rf~Y6U?7
read_nPos(); 8N&+7FK
} 7%f&M>/
else L){iA-k;Ec
{ \K`L3*cBKK
nStartPos = new long[bean.getNSplitter()]; 5GA C`}}
nEndPos = new long[bean.getNSplitter()]; ,R%q}IH#
} M?m,EQh.
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} g0R~&AN!g
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public void run() 7X@mSXis
{ ~t9tnLc$
//获得文件长度 8>hwK )av
//分割文件 }\J2?Et{
//实例FileSplitterFetch P3$Q&^?
//启动FileSplitterFetch线程 O nQdq^UB
//等待子线程返回 .7K7h^*F
try{ `]Q:-h
if(bFirst) V"c
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{ Z}$TKO*u
nFileLength = getFileSize(); )W/;=K
if(nFileLength == -1) cufH?Xg<
{ UMAgA!s
System.err.println("File Length is not known!"); Zm6{n'
} zR2B-
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else if(nFileLength == -2) Tg!m`9s+
{ ~e6Brq
System.err.println("File is not access!"); 1UPC e
} '>r7V
else Ym3\pRFiD
{ 94B\5I}
for(int i=0;i<nStartPos.length;i++) hzk cP
{ UQ{L{H
nStartPos = (long)(i*(nFileLength/nStartPos.length)); Z&;uh_EC
} vZ.x{"n'~
for(int i=0;i<nEndPos.length-1;i++) <HbcNE~
{ ``wSc0\
nEndPos = nStartPos[i+1]; u ~A6bK*
} ,l<6GB2\
nEndPos[nEndPos.length-1] = nFileLength; 'Lu__NfN
} '7XIhN9
} z`:lcF{V
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//启动子线程 4$P0 :
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; o!)3?
for(int i=0;i<nStartPos.length;i++) On?p 9^9
{ 8-2cRs
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =Xo
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), :Nz9xD$S5
nStartPos,nEndPos,i); J+`VujWT
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); |`.([2
fileSplitterFetch.start(); HDF|{
} l<A|d{" ]
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #{?qNl8F*J
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); zAiXo__x
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", !QvZ<5(
nEndPos = " + nFileLength); G K7![p
// fileSplitterFetch[nPos.length-1].start(); ?#fu.YE\
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//等待子线程结束 6_FE 4RR[
//int count = 0; r,h%[JKM
//是否结束while循环 DQr Y*nH
boolean breakWhile = false; RJd(~1
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while(!bStop) s,]z[qB#$
{ zx)z/1
write_nPos(); +mn,F};
Utility.sleep(500); , GP?amh
breakWhile = true; HhvdqvIEG
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for(int i=0;i<nStartPos.length;i++) -4
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{ @0/+_2MH-
if(!fileSplitterFetch.bDownOver) PK `D8)=u
{ t+!$[K0/
breakWhile = false;
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break; ^zQ/mo,Z
} `Tv[DIVW
} "$YJX1u3
if(breakWhile) |>dI/_'
break; =w{Z@S(ukz
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//count++; e]zBf;9J
//if(count>4) )8$=C#qC[
// siteStop(); ^G}47(
} rR(X9i
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System.err.println("文件下载结束!"); E?
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} T7hcnF$
catch(Exception e){e.printStackTrace ();} y.< m#Zzt
} %5"9</a&G
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//获得文件长度 k@k&}N0{
public long getFileSize() rE.;g^4p
{ RwpdRBb
int nFileLength = -1; D$I5z.a
try{ wNpTM8rfU#
URL url = new URL(siteInfoBean.getSSiteURL()); Y,^@P
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ).`1+b
httpConnection.setRequestProperty("User-Agent","NetFox"); jK& h~)
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int responseCode=httpConnection.getResponseCode(); h7lDHIQf
if(responseCode>=400) "hH.#5j
{ l~w2B>i)
processErrorCode(responseCode); U@uGNMKR
return -2; //-2 represent access is error w"Gm; B4
} of%Ktm5Qi
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String sHeader; 3u*4o=4e
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for(int i=1;;i++)
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{ >4TaP*_
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); r\'A
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//Utility.log(in.readLine()); o$jLzE"
sHeader=httpConnection.getHeaderFieldKey(i); uKUiV%p!
if(sHeader!=null) g| I6'K!<
{ O;:mCt _H
if(sHeader.equals("Content-Length")) (MxQ+D\
{ MOQ*]fV:
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); d928~y
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break; \`~Ly-
} "n(hfz0y%
} >UiYL}'br6
else ^
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break; jFL #s&ft
} P}n_IV*@
} ,Z&xNBX
catch(IOException e){e.printStackTrace ();} '"0'Oua
catch(Exception e){e.printStackTrace ();} 1ySk;;3
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Utility.log(nFileLength); f
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return nFileLength; vWzm@
} ` Mjj@[
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//保存下载信息(文件指针位置) CkOz
private void write_nPos() c|e~BQdRw
{ [%y';`( x
try{ [1g8*j~L
output = new DataOutputStream(new FileOutputStream(tmpFile)); zy/@
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output.writeInt(nStartPos.length); a*lh)l<KV
for(int i=0;i<nStartPos.length;i++) pjKWtY@=X
{ `VA"vwz
// output.writeLong(nPos); =Y{(%sn
output.writeLong(fileSplitterFetch.nStartPos); <\rT%f}3^
output.writeLong(fileSplitterFetch.nEndPos); UZ\u;/}
}
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output.close(); _|kxY'_[8
} J=9FRC
catch(IOException e){e.printStackTrace ();} P{kur} T
catch(Exception e){e.printStackTrace ();} /M1ob: m
} j4gF;-m<
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//读取保存的下载信息(文件指针位置) q9KHmhUD
private void read_nPos() fInb[
{ 0L2 F[TN
try{ DR5\45v
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 36}?dRw#p
int nCount = input.readInt(); o4G ?nvK-
nStartPos = new long[nCount]; CGW.I$u
nEndPos = new long[nCount]; T*Y~\~Jhu
for(int i=0;i<nStartPos.length;i++) [kVS
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{ ?GKb7Oj
nStartPos = input.readLong(); >)fi^
nEndPos = input.readLong(); q/4J.jL
} 9UdM`v)(
input.close(); rK' L6o
} EH+"~-v)ae
catch(IOException e){e.printStackTrace ();} gX@HO|.t
catch(Exception e){e.printStackTrace ();} }eCw6
} H%qsjB^
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private void processErrorCode(int nErrorCode) Vz~{UHH6
{ ?8npG]L)
System.err.println("Error Code : " + nErrorCode); tU }h~&M
} @K &GJ
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//停止文件下载 jwc)Lj}
public void siteStop() E:UW#S%A
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{ [A+
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bStop = true; orzZ{87
for(int i=0;i<nStartPos.length;i++) l:
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fileSplitterFetch.splitterStop(); p|X"@kuseO
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} Sq>dt[7
} DrKP%BnS
//负责部分文件的抓取 "%`1]Fr
**FileSplitterFetch.java dU&a{$ku[
*/ K[I=6
package NetFox; d~9A+m3b_
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import java.io.*; f',Op1o
import java.net.*; \j@OZ
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public class FileSplitterFetch extends Thread { epA:v|S
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String sURL; //File URL j$M h+5
long nStartPos; //File Snippet Start Position q }i]'7
long nEndPos; //File Snippet End Position -o^7r@6
int nThreadID; //Thread's ID U$O\f18
boolean bDownOver = false; //Downing is over m ifxiV
boolean bStop = false; //Stop identical wT6"U$cV
FileAccessI fileAccessI = null; //File Access interface pj\u9
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException CuaVb1r
{ = 6j&4p
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this.sURL = sURL; R{C(K(5/
this.nStartPos = nStart; x>**;#7)
this.nEndPos = nEnd; SL Ws*aq
nThreadID = id; u(z$fG:g
fileAccessI = new FileAccessI(sName,nStartPos);//定位 qk%;on&`
} C8J[Up
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public void run() &p'Y^zL-
{ hr#M-K
while(nStartPos < nEndPos && !bStop) 4`4kfiS$
{ Tm~" IB*
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try{ \{Y 7FC~
URL url = new URL(sURL); &C`Gg<
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); E(*0jAvO[z
httpConnection.setRequestProperty("User-Agent","NetFox"); D#_3^Kiawj
String sProperty = "bytes="+nStartPos+"-"; :NhO2L
httpConnection.setRequestProperty("RANGE",sProperty); G!Op~p@Jm
Utility.log(sProperty); cVXLKO
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InputStream input = httpConnection.getInputStream(); 2i)^!c
//logResponseHead(httpConnection); `LrHKb
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byte[] b = new byte[1024]; M,j U}yD3
int nRead; %:M^4~dc
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ${<%" hR$
{ LD+{o 4i
nStartPos += fileAccessI.write(b,0,nRead); 216 RiSr*
//if(nThreadID == 1) iW)8j 8
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); n4O]8C'lW9
} k9<;woOBO
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Utility.log("Thread " + nThreadID + " is over!"); fW{(lPx
bDownOver = true; {0L1X6eg
//nPos = fileAccessI.write (b,0,nRead); S(k3 `;K
} ^%d\qd`
catch(Exception e){e.printStackTrace ();} YX!{P=Ua
} zykT*V
} hwPw]Ln/
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//打印回应的头信息 ^ sOQi6pL
public void logResponseHead(HttpURLConnection con) &xU[E!2H%
{ `"Jj1O@
for(int i=1;;i++) S-a]j;U
{ `68@+|#
String header=con.getHeaderFieldKey(i); J!AgBF N4
if(header!=null) >
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//responseHeaders.put(header,httpConnection.getHeaderField(header)); Z-$[\le
Utility.log(header+" : "+con.getHeaderField(header)); $POu\TO
else )cW#Rwu_A4
break; gt\E`HB8E
} 3$9s\<j
} O\
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public void splitterStop() ?1*cO:O
{ 8Q.T g.
bStop = true; ])[[ V!1
} OyStq i
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} 46}g7skD
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/* OsTc5K.U~
**FileAccess.java g1;:KzVv
*//文件访问(定位,写) zv|2:4H
package NetFox; l^!
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import java.io.*; 5us:adm[pD
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public class FileAccessI implements Serializable{ ;"xfOzQ
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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 _jvxc'6
RandomAccessFile oSavedFile; [xK3F+
long nPos; R#s)r
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public FileAccessI() throws IOException I:E`PZ
{ MH
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this("",0); FDv<\2+ c
} X1:V<,}"
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public FileAccessI(String sName,long nPos) throws IOException aH yx_B
{ 2VPdw@"~}
oSavedFile = new RandomAccessFile(sName,"rw"); J9..P&c\
this.nPos = nPos; ISzqEi
oSavedFile.seek(nPos); $6#CqWhI
} Je';9(ZK
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public synchronized int write(byte[] b,int nStart,int nLen) rbul8(1h
{ !-g{[19\
int n = -1; ]dF
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try{ 9G9t" {
oSavedFile.write(b,nStart,nLen); ?Lx24*5%
n = nLen; .zr-:L5{
} $6qh|
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catch(IOException e) gLb`pCo/
{ imVo<Je7z(
e.printStackTrace (); UI0(=>L
} ;RH;OE,A
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return n; EHSlK5bD,
} OP;v bZ
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} q'+)t7!
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/* \Yy$MLs
**SiteInfoBean.java ['b}QW@Fx
*/ Z/G
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package NetFox; w3N[9w?1
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