/* 1{~9:U Q
**SiteFileFetch.java OVd"'|&6_
*/ hsl8@=_ B
package NetFox; _
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import java.io.*; W$3p,VTMmB
import java.net.*; \<PW_'6
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public class SiteFileFetch extends Thread { USbiI%
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SiteInfoBean siteInfoBean = null; //文件信息Bean $DMeUA\av
long[] nStartPos; //开始位置 #e#8I7P
long[] nEndPos; //结束位置 ;6]+/e7O
FileSplitterFetch[] fileSplitterFetch; //子线程对象 *L^{p.K4
long nFileLength; //文件长度 =tP|sYR]^
boolean bFirst = true; //是否第一次取文件 )sL:iGU
boolean bStop = false; //停止标志 CEUR-LK0
File tmpFile; //文件下载的临时信息 W w8[d
DataOutputStream output; //输出到文件的输出流 N(
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) a@ lK+t
public SiteFileFetch(SiteInfoBean bean) throws IOException 2`lit@u&u
{ hA"N&v~
siteInfoBean = bean; tVe*J@i\$
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ,:#prT[P"
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); "16==tLFE
if(tmpFile.exists ()) sz)3
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{ F;z FKvn
bFirst = false; ?>,aq>2O$
read_nPos(); fb#Ob0H
}
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else ,og@}gOMB
{ H7{ 6t(0j
nStartPos = new long[bean.getNSplitter()]; -aO3/Ik[q
nEndPos = new long[bean.getNSplitter()]; ;hg]5r_
} jf})"fz-*
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} "'PDreS
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public void run() h)YqC$A-s
{ p<![JeV
//获得文件长度 wRuJein#
//分割文件 vI+PL(T@
//实例FileSplitterFetch zX5p'8-
//启动FileSplitterFetch线程 d8x$NW-s
//等待子线程返回 sQ`8L+oY
try{ / '7WL[<
if(bFirst) c XY!b=9
{ o30PI
nFileLength = getFileSize(); 1LE8,Gm&
if(nFileLength == -1) H8\N~>
{ #ucOjdquq
System.err.println("File Length is not known!"); SKYS6b
} zcA"\
else if(nFileLength == -2) B4{A(-Tc
{ bg$e80
System.err.println("File is not access!"); ^&,{
} XjX<?W
else un\"1RdO
{ ir\
for(int i=0;i<nStartPos.length;i++) %;zA_Wg
{ .t["kaA
nStartPos = (long)(i*(nFileLength/nStartPos.length)); Gd'^vqo<
} E2\)>YF{P
for(int i=0;i<nEndPos.length-1;i++) '[A>eC++
{ mB!81%f%|
nEndPos = nStartPos[i+1]; Pajr`gU
} A5nu`e9&
nEndPos[nEndPos.length-1] = nFileLength; \F<]l6E
} K|s+5>]W/[
} lxxK6;r~>
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//启动子线程 PCFm@S@Q
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; #}A!Bk
for(int i=0;i<nStartPos.length;i++) J"SAA0)@
{ }b0qrr
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), BgE]xm
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), b?Vu9!
nStartPos,nEndPos,i); Y@pa+~[{h3
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Ds-%\@p
fileSplitterFetch.start(); k|BEAdQ%M
} EKDv3aFQZ#
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), I=b#tUBh8
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); myXp]=Sb?
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Maq{H`
nEndPos = " + nFileLength); 9t)t-t#P;
// fileSplitterFetch[nPos.length-1].start(); @4&sL] (q
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//等待子线程结束 t=U[ ;?
//int count = 0; AU
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//是否结束while循环 9aXm}
boolean breakWhile = false; , X|oCD
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while(!bStop) ebQYk$@
{ >w
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write_nPos(); >u6kT\|^C
Utility.sleep(500); J|K~a?&vN
breakWhile = true;
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for(int i=0;i<nStartPos.length;i++) n[{o~VN
{ PAqziq.
if(!fileSplitterFetch.bDownOver) B]kz3FF
{ dz7*a{
breakWhile = false; ]5}
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break; .kBAUkL:
} 8^HMK$
} ^^)Pv#[3
if(breakWhile) 9@^/ON\O
break; kKCkjA:o##
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//count++; ^&.F!
//if(count>4) 4}l,|7_&I
// siteStop(); C~:aol i;
} {)`5*sd
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System.err.println("文件下载结束!"); ?X=9@ m
} $3FFb#r
catch(Exception e){e.printStackTrace ();} ?Bk"3{hl
} eyy&JjVs
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//获得文件长度 n /rQ*hr
public long getFileSize() mWO=(}Fb\
{ BPC$ v\a
int nFileLength = -1; g*8sh
try{ )L^WD$"'Q
URL url = new URL(siteInfoBean.getSSiteURL()); :egSW2"5S
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,Kdvt@vle
httpConnection.setRequestProperty("User-Agent","NetFox"); R`/nsou
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int responseCode=httpConnection.getResponseCode(); ydBoZ3 }
if(responseCode>=400) &?x^I{j
{ Inr ~9hz
processErrorCode(responseCode); v6iV#yz3(
return -2; //-2 represent access is error 'e0qdY`
} Mc{1Cdj
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String sHeader; lK}F>6^\
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for(int i=1;;i++) !dmI}<@&k
{ `
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 3A'd7FJ0G
//Utility.log(in.readLine()); EjvxfqPv
sHeader=httpConnection.getHeaderFieldKey(i); *}yW8i}36
if(sHeader!=null) 2W|j
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{ I:='LH,
if(sHeader.equals("Content-Length")) m3.d!~U\
{ 2,dGRf
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); [7L1y) I(
break; R1?g6. Mq
} ynDa4HB
} l HZf'P_Wx
else NjL,0Bp
break; -rU *)0PR
} v%B^\S3)
} T w/CJg
catch(IOException e){e.printStackTrace ();} nuXaZRH
catch(Exception e){e.printStackTrace ();} U4M!RdG
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Utility.log(nFileLength); E]"ePdZZ/
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return nFileLength; K2)),_,@5+
} XPb7gd"%W
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//保存下载信息(文件指针位置) {8b6A~/
private void write_nPos() +-HaYB|p
{ `N2zeFG
try{ 5Ss=z
output = new DataOutputStream(new FileOutputStream(tmpFile)); .wYx_
output.writeInt(nStartPos.length); %z1WdiC
for(int i=0;i<nStartPos.length;i++) IOt!A
{ RM QlciG
// output.writeLong(nPos); [ bE9Y;
output.writeLong(fileSplitterFetch.nStartPos); -s4qm)\
output.writeLong(fileSplitterFetch.nEndPos); zn@tLLX
} qH"e:
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output.close(); L
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} b\H~Ot[i
catch(IOException e){e.printStackTrace ();} Zj!S('hSY
catch(Exception e){e.printStackTrace ();} BQt!L1))
} TQYud'u/
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//读取保存的下载信息(文件指针位置) F|Jo|02
private void read_nPos() kXv
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{ 4z?6[Cg<
try{ %p@A8'b
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 5ahAp];
int nCount = input.readInt(); RIb<
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nStartPos = new long[nCount]; Rnun() plJ
nEndPos = new long[nCount]; p4|:u[:&
for(int i=0;i<nStartPos.length;i++) eDIjcZ
{ ld`oIEj!P_
nStartPos = input.readLong(); fs7JA=?:
nEndPos = input.readLong(); >.QD:_@:
} sd.:PE <
input.close(); ,SS@]9A&
} k45xtKS>d
catch(IOException e){e.printStackTrace ();} A10/"Ec<u
catch(Exception e){e.printStackTrace ();} zgqe@;{
} 3E:wyf)i"
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private void processErrorCode(int nErrorCode) <86upS6
{ 1rT}mm/e;
System.err.println("Error Code : " + nErrorCode); '2v,!G]^
} ; #e-pkV
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//停止文件下载 f4]nz:2
public void siteStop() ^MDBJ0
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{ ) Q]kUG#`
bStop = true; Pgs4/
for(int i=0;i<nStartPos.length;i++) v!K%\h2A
fileSplitterFetch.splitterStop(); \O72PC+
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} .kvuI6H
} w%j 6zsTz
//负责部分文件的抓取 i#&]{]}Qv
**FileSplitterFetch.java vQYd!DSh
*/ F(}d|z@@
package NetFox; l'?/$?'e_Z
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import java.io.*; y!
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import java.net.*; 'I*F(4x
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public class FileSplitterFetch extends Thread { 5|&Sg}_
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String sURL; //File URL D("['`{
long nStartPos; //File Snippet Start Position l,-smK69
long nEndPos; //File Snippet End Position enK4`+.7
int nThreadID; //Thread's ID
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boolean bDownOver = false; //Downing is over 5qR76iH)/
boolean bStop = false; //Stop identical *cq#>rN
FileAccessI fileAccessI = null; //File Access interface 'xvV;bi
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException i#iY;R8
{ )6^b\`
this.sURL = sURL; Su6ZO'[)
this.nStartPos = nStart; v #IC
this.nEndPos = nEnd; H[fD
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nThreadID = id; u;J9aKD
fileAccessI = new FileAccessI(sName,nStartPos);//定位 \d]&}`'4{f
} 9F ).i
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public void run() **dGK_^T0
{ Nbuaw[[iz
while(nStartPos < nEndPos && !bStop) hFs0qPVY
{ DV]Kd
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try{ _Ev"/%
URL url = new URL(sURL); X*}S(9cg\i
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); &h8+-
httpConnection.setRequestProperty("User-Agent","NetFox"); M'R^?Jjb
String sProperty = "bytes="+nStartPos+"-"; cD-\fRBGK
httpConnection.setRequestProperty("RANGE",sProperty); Vy&F{T;$
Utility.log(sProperty); eW0:&*.vMj
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InputStream input = httpConnection.getInputStream(); X7Cou6r
//logResponseHead(httpConnection); K;gm^
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byte[] b = new byte[1024]; L'z;*N3D
int nRead; 6EP5n
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) G2
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{ E!C~*l]wJx
nStartPos += fileAccessI.write(b,0,nRead); %ktU 51o
//if(nThreadID == 1) Y')in7g
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Eki7bT@/
} W~Eq_J?I
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Utility.log("Thread " + nThreadID + " is over!"); f+-w~cN
bDownOver = true; U_Emp[
//nPos = fileAccessI.write (b,0,nRead); RR*z3i`PP
} UIIunA9
catch(Exception e){e.printStackTrace ();} V92e#AR
} dD@T}^j *|
} sW@4r/F>:D
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//打印回应的头信息 e8--qV#<
public void logResponseHead(HttpURLConnection con) ib;:*
{ -QI1>7sl
for(int i=1;;i++) nke[}Hqf
{ }eULcgRG
String header=con.getHeaderFieldKey(i); !@%m3)T8
if(header!=null) e
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//responseHeaders.put(header,httpConnection.getHeaderField(header)); )TVyRY Z1
Utility.log(header+" : "+con.getHeaderField(header)); .#lQZo6$\|
else \/S?.P#L~
break; }7wQFKME
} ]C}z3hhk
} :X,1KR
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public void splitterStop() +w%MwPC7`
{ po\Q Me
bStop = true; cQS}pQyYN
} UTHGjE
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} f\2'/g}6a
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/* Cq}LKiu
**FileAccess.java "<txg%j\J
*//文件访问(定位,写) _ N.ZpKVu
package NetFox; pU<->d;->
import java.io.*; I>C;$Lp]
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public class FileAccessI implements Serializable{ US@ak4Y6Z
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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 .2Y"=|NdA
RandomAccessFile oSavedFile; cuW$%$F
long nPos; $*`fn{2
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0 \&4?
public FileAccessI() throws IOException vb\ UP&Ip
{ drNfFx2
this("",0); [gqV}Y"Md
} <