/* ycq+C8J+Ep
**SiteFileFetch.java 0<i8
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*/ srlxp_^
package NetFox; >Nam@,hm
import java.io.*; ZLDO&}
import java.net.*; "DO|B=EejP
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public class SiteFileFetch extends Thread { P2Jo^WS
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SiteInfoBean siteInfoBean = null; //文件信息Bean p!>5}f6
long[] nStartPos; //开始位置 <-6f}wN
long[] nEndPos; //结束位置 :6gRoMb]
FileSplitterFetch[] fileSplitterFetch; //子线程对象 v6U Gr4
long nFileLength; //文件长度 !zVjbYWY
boolean bFirst = true; //是否第一次取文件 |)VNf.aJZ
boolean bStop = false; //停止标志 a yYl3
File tmpFile; //文件下载的临时信息 shgZru
DataOutputStream output; //输出到文件的输出流 ;
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) j>8S,b=%
public SiteFileFetch(SiteInfoBean bean) throws IOException ;n q"jm
{ ?;]Xc~
siteInfoBean = bean; ,(i`gH{D
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); q2b>Z6!5
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 8vkCmV
if(tmpFile.exists ()) >,x&L[3
{ 'yo-`nNFD
bFirst = false; $^e(?Pq
read_nPos(); 4A`U [r_>D
} lY&Sx{-
else '4Drs}j5
{ P3!JA)p6a
nStartPos = new long[bean.getNSplitter()]; `pb=y}
nEndPos = new long[bean.getNSplitter()]; D\^mh{q(
} `]`S"W7&
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} VS\| f'E
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public void run() :}UjX|D
{ kQF3DR$,B
//获得文件长度 uZM%F)
//分割文件 MQe|\SMd
//实例FileSplitterFetch .sjv"D"
//启动FileSplitterFetch线程 @;G%7&ps
//等待子线程返回 -lqD
try{ oI5^.Dr FW
if(bFirst) j[,XJ,5=
{ 5g%D0_e5
nFileLength = getFileSize(); y@@h )P#
if(nFileLength == -1) ( Sjlm^bca
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System.err.println("File Length is not known!"); Y[N@ )E_G
} 6u'E}hAx|
else if(nFileLength == -2) -d9L
{ rf^u&f
System.err.println("File is not access!"); u9{SG^
}
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else `PZ\3SC'i
{ 4/V;g%0uN;
for(int i=0;i<nStartPos.length;i++) TNDp{!<|L;
{ Q@"}v_r4
nStartPos = (long)(i*(nFileLength/nStartPos.length)); )<%CI#s#
} ^-LnO%h?
for(int i=0;i<nEndPos.length-1;i++) n&!q9CR`
{ ~Ede5Vg!!2
nEndPos = nStartPos[i+1]; #@' B\!<@=
} JXjH}C
nEndPos[nEndPos.length-1] = nFileLength; ^RE[5h6^q
} L&KL]n
} O=eU38n:5u
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//启动子线程 Uw]o9 e0S
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; }vU^gPH
for(int i=0;i<nStartPos.length;i++) 7~r_nP_
{ <Mndr8 H
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ay
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), L#?mPF
nStartPos,nEndPos,i); L=<$^ m
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9K;g\? 3
fileSplitterFetch.start(); Ng1bjq}E2
} TS`m&N{i")
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6"[J[7up
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); g[' 7 $
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", La28%10
nEndPos = " + nFileLength); HWIn.ij
// fileSplitterFetch[nPos.length-1].start(); \T[OF8yhW
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//等待子线程结束 )gz]F_
//int count = 0; _R^ZXtypd
//是否结束while循环 aeVd.`lxM
boolean breakWhile = false; }~Do0XUH
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while(!bStop) mo9(2@~<
{ @HTs.4
write_nPos(); /eT9W[a
Utility.sleep(500); ]heVR&bQ
breakWhile = true; xi=0kO
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for(int i=0;i<nStartPos.length;i++) S(Z\h_m(
{ WL|71?@C
if(!fileSplitterFetch.bDownOver) :`K2?;DC8
{ NiEz3ODSi
breakWhile = false; Xq_hC"s
break; 2s=zT5
} ~;-2eKw
} 0eKLp8;Lh
if(breakWhile) @NiLKcL#
break; \Unawv~
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//count++; +vH#xc\'
//if(count>4) R%~~'/2V
// siteStop(); #V)l>
} j+>[~c;0)
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System.err.println("文件下载结束!"); Zx`/88!x[
} ~.6% %1?
catch(Exception e){e.printStackTrace ();} c}!`tBTm
} g6xQQ,q=l
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//获得文件长度 `gF]
public long getFileSize() C^LxJG{L5
{ 4]E1x l
int nFileLength = -1; _j4K
try{ R6`mmJ+'
URL url = new URL(siteInfoBean.getSSiteURL()); 9':Hh'
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); S|;}]6p
httpConnection.setRequestProperty("User-Agent","NetFox"); Q );}1'c
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int responseCode=httpConnection.getResponseCode(); NGRXNh+
if(responseCode>=400) ~[kI![
{ d|`8\fq
processErrorCode(responseCode); <Fv7JPN%
return -2; //-2 represent access is error cp"{W-Q{$
} *3h_'3yo@
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String sHeader; kyZZ0
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for(int i=1;;i++) e|>@ >F]K
{ QxuU3#l
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); \F\xZ.r
//Utility.log(in.readLine()); RH$l?j6
sHeader=httpConnection.getHeaderFieldKey(i); R&:Qy7"
if(sHeader!=null) &|h9L' mr
{ z_#HJ}R=
if(sHeader.equals("Content-Length")) X{[$4\di{
{ ug'^$geM
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); E(z|LS*3
break; kpy)kS
} /!.]Y8yEH
} GO*D4<#u
else In;P33'p
break; i5_l//]
} O;&5>
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} I.>8p]X
catch(IOException e){e.printStackTrace ();} X)=m4\R
catch(Exception e){e.printStackTrace ();} pcQkJF
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Utility.log(nFileLength); {%RwZ'
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return nFileLength; OLIMgc(W
} 842v^ 2
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//保存下载信息(文件指针位置) OIj.K@Kr
private void write_nPos() 0R? @JC
{ h! uyTgq
try{ Y=|p}>.}
output = new DataOutputStream(new FileOutputStream(tmpFile)); %\HE1d5;
output.writeInt(nStartPos.length); U"/T`f'H z
for(int i=0;i<nStartPos.length;i++) ^[.}DNR95(
{ Q>Klkd5(
// output.writeLong(nPos); .`~?w+ ~
output.writeLong(fileSplitterFetch.nStartPos); tl /i
output.writeLong(fileSplitterFetch.nEndPos); Odwf7>
} 9QX!HQ|5y8
output.close(); 'k]~Q{K$
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catch(IOException e){e.printStackTrace ();} 3O;H&
catch(Exception e){e.printStackTrace ();} 1K#[Ef4
} OqS!y(
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//读取保存的下载信息(文件指针位置) 1#cTk
private void read_nPos() i`e[Vwe2x@
{ ROn@tW
try{ UapU:>!"`
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); VqvjOeCbH
int nCount = input.readInt(); } r(b:}DN
nStartPos = new long[nCount]; ;^bfLSWm{
nEndPos = new long[nCount]; [ KgO:},c
for(int i=0;i<nStartPos.length;i++) Z[w}PN,xV
{ d)V8FX,t
nStartPos = input.readLong(); uWKmINjv'
nEndPos = input.readLong(); ;<m*ASM.3
} i$%Bo/Y
input.close(); f8[O]MrO;
} ;G}
catch(IOException e){e.printStackTrace ();} ,x1OQ jtY
catch(Exception e){e.printStackTrace ();} @@^iN~uf
} .xwskzJ3
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private void processErrorCode(int nErrorCode) OnE%D|Tq=
{ q++\<\2
System.err.println("Error Code : " + nErrorCode); n_; s2,2r
} $.C-_L
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//停止文件下载 pl3ap(/
public void siteStop() Lu6g`O:['
{ B(1-u!pz
bStop = true; O6/ vFEB
for(int i=0;i<nStartPos.length;i++) q\?p' i
fileSplitterFetch.splitterStop(); `XH0S`B
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}
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} 8Yk*$RR9
//负责部分文件的抓取 U!-Nx9
**FileSplitterFetch.java nS3Aadm
*/ d/yF}%0QI
package NetFox; NjZ~b/
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import java.io.*; yIn$ApSGY
import java.net.*; 2<B'PR-??y
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public class FileSplitterFetch extends Thread { @:Zk,
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String sURL; //File URL u$^tRz9
long nStartPos; //File Snippet Start Position WN=0s
long nEndPos; //File Snippet End Position 0D 2I)E72o
int nThreadID; //Thread's ID p&RC#wYu
boolean bDownOver = false; //Downing is over 04dz?`HuB
boolean bStop = false; //Stop identical +={K -g7U
FileAccessI fileAccessI = null; //File Access interface CR'%=N04^
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 131(0nl)=I
{ xrvM}Il
this.sURL = sURL; B2j1GJEO
this.nStartPos = nStart; -c]AS[(
this.nEndPos = nEnd; ciODTq?
nThreadID = id; 3E*m.jX
fileAccessI = new FileAccessI(sName,nStartPos);//定位 Sp X;nH-D
} sq`Xz8u
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public void run() V>T?'GbS
{ ~C%I'z'
while(nStartPos < nEndPos && !bStop) nI]EfHU
{ :1UMA@HP
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try{ JXJ+lZmsz
URL url = new URL(sURL); u|t l@_
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 8-x-?7
httpConnection.setRequestProperty("User-Agent","NetFox"); L_Gw:"-+Q
String sProperty = "bytes="+nStartPos+"-"; '+_>PBOc
httpConnection.setRequestProperty("RANGE",sProperty); [-$
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Utility.log(sProperty); t([}a~1}
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InputStream input = httpConnection.getInputStream(); oV:oc,
//logResponseHead(httpConnection); iv$YUM+
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byte[] b = new byte[1024]; W#<1504ip
int nRead; HGGq;Nbm
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) :/|"db&`
{ Ldjz-
nStartPos += fileAccessI.write(b,0,nRead); S/5QK(XLC)
//if(nThreadID == 1) 0h@FHw2d
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *[]E5U
} X-HE9PT.
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Utility.log("Thread " + nThreadID + " is over!"); |2q3spd
bDownOver = true; A0)^I:&
//nPos = fileAccessI.write (b,0,nRead); f zo'9
} h )
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catch(Exception e){e.printStackTrace ();} 12n:)yQy
} &Pr\n&9A
} Zigv;}#
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//打印回应的头信息 Lg7A[\c
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public void logResponseHead(HttpURLConnection con) EhHxB
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{ w2nReB z
for(int i=1;;i++) \2s`mCY
{ [Iks8ZWr_
String header=con.getHeaderFieldKey(i); "OjAhKfG
if(header!=null) *XTd9E^tXq
//responseHeaders.put(header,httpConnection.getHeaderField(header)); X@`a_XAfd
Utility.log(header+" : "+con.getHeaderField(header)); (P)G|2=
else Q|AZv>'!
break;
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} W r/-{Wt
} lv
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public void splitterStop() /IpCo
{ #Lhv=0op
bStop = true; G|g^yaq>
} nQc#AFg
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} gN=.}$Kfu
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/* aZA``#p+
**FileAccess.java ]1!" q40)]
*//文件访问(定位,写) 3%Y:+%VE
package NetFox; @z@%vr=vX
import java.io.*; D!&(#Vl
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public class FileAccessI implements Serializable{ >aVgI<
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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 OldOc5D
RandomAccessFile oSavedFile; "313eeIt%i
long nPos; GI% &.V d
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public FileAccessI() throws IOException Vx_33";S\
{ @ma(py
this("",0); \Rny*px
} (&:gD4.
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public FileAccessI(String sName,long nPos) throws IOException XNJ4T]><
{ t7+A!7b{
oSavedFile = new RandomAccessFile(sName,"rw"); 'X?xn@?
this.nPos = nPos; jo`ZuN{
oSavedFile.seek(nPos); _VrY7Mz:r
} PXb$]HV
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public synchronized int write(byte[] b,int nStart,int nLen) ;m(iKwDt
{ [oLV,O|s|j
int n = -1; Gnkar[oa&
try{ .Nn11F< d
oSavedFile.write(b,nStart,nLen); 3z+l-QO8
n = nLen; R?xb1yc7_
} `S
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