/* .j"heYF)
**SiteFileFetch.java %cDDu$9;
*/ (Q
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package NetFox; |9Yx`_DF
import java.io.*; .sOZ "=tW
import java.net.*; $sZ4r>-
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public class SiteFileFetch extends Thread { e%4vvPp
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SiteInfoBean siteInfoBean = null; //文件信息Bean .y_ ~mr&d
long[] nStartPos; //开始位置 &gJ@"`r4
long[] nEndPos; //结束位置 k`]76C7
FileSplitterFetch[] fileSplitterFetch; //子线程对象 'MB+cz+v
long nFileLength; //文件长度 b"`fS`@/MW
boolean bFirst = true; //是否第一次取文件 =knLkbiq7,
boolean bStop = false; //停止标志 GukwN]*OY
File tmpFile; //文件下载的临时信息 3m2y<l<
DataOutputStream output; //输出到文件的输出流 n<HF]
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) NS+uiy
public SiteFileFetch(SiteInfoBean bean) throws IOException a9_2b}t
{ i.[k"(
siteInfoBean = bean; cXN0D\%`
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); /X#OX8gb]
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); rq1~%S
if(tmpFile.exists ()) ~x_(v,NW
{ #q9BU:
bFirst = false; F8{T/YhZ
read_nPos(); LW("/
} }v?l0Gk(
else -XkjO$=!=
{ XuZgyt"=r
nStartPos = new long[bean.getNSplitter()];
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nEndPos = new long[bean.getNSplitter()]; //Xz
} ?V_v=X%w
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} A,=
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public void run() [`KQ\4u
{ OT)`)PZ"
//获得文件长度
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//分割文件 HJ!)&xT
//实例FileSplitterFetch 6+PP(>em
//启动FileSplitterFetch线程 `<Hc,D; p
//等待子线程返回 #}Ays#wA>?
try{ =Q|s[F
if(bFirst) ypfjF@OT
{ gKIN* Od
nFileLength = getFileSize(); *1>T c,mb
if(nFileLength == -1) WCp[6g&%O
{ W^3'9nYU
System.err.println("File Length is not known!"); /T6Te<68^
} eMH\]A~v"
else if(nFileLength == -2) _,- \;
{ mj9]M?]
System.err.println("File is not access!"); .=c@ps
} C|QJQ@bj0
else Ww{-(Ktx
{ x_H"<-By
for(int i=0;i<nStartPos.length;i++) P|aSbsk:I<
{ H"2,Q
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); \nQEvcH
} o%Qn%gaX
for(int i=0;i<nEndPos.length-1;i++) a1weTn*
{ o`}8ZtD
nEndPos = nStartPos[i+1]; _)#~D*3
} O}7aX '
nEndPos[nEndPos.length-1] = nFileLength; ACgWT
} TR{dNO!q
} 27H4en; o=
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//启动子线程 %,) Xi
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; j7HOh|q
for(int i=0;i<nStartPos.length;i++) )/tdiRpn
{ Szlww
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), WF<*rl
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), *P[N.5{
nStartPos,nEndPos,i); rX&?Xi1JeV
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); JhB$s
fileSplitterFetch.start(); I~c}&'V
} %M05& <
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ^EKf_w-v
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 5{8,+
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// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", .ZH5^Sv$vp
nEndPos = " + nFileLength); Xc]Q_70O
// fileSplitterFetch[nPos.length-1].start(); 9M-/{D^+<
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//等待子线程结束 )$I"LyK)
//int count = 0; !^A t{[U
//是否结束while循环 pJwy~ L
boolean breakWhile = false; cNqw(\rr
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while(!bStop) 8f|+045E@
{ Z7R+'OC
write_nPos(); fBt7#Tc=U
Utility.sleep(500); %|3UWN
breakWhile = true; vweD{\b
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for(int i=0;i<nStartPos.length;i++) r7p>`>_Q\
{ sQe>LNp,G
if(!fileSplitterFetch.bDownOver) _qqJ>E<0
{ S b3@7^
breakWhile = false; Z@`HFZJ
break; Ok~\
} D<cHa |
} n-_-;TYH
if(breakWhile) V|fs"HY
break; 2]*2b{gF,
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//count++; /P|jHK|{
//if(count>4) Ws`P(WHm
// siteStop(); ]={{$}8.
} 8~|PZ,oZ
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System.err.println("文件下载结束!"); oFV>b
} 5q?ZuAAA
catch(Exception e){e.printStackTrace ();} !(Y23w*
} ~dK)U*Q
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//获得文件长度 9YpD\H`
public long getFileSize() ( Qw"^lE3
{ x*[\$E`v
int nFileLength = -1; X@)5F 9
try{ BUcze\+
URL url = new URL(siteInfoBean.getSSiteURL()); FXOA1VEg
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); yggQ4y6
httpConnection.setRequestProperty("User-Agent","NetFox"); 6nRD:CH)X
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int responseCode=httpConnection.getResponseCode(); Hs8c%C
if(responseCode>=400) MDS;qZx=
{ eUA6X
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processErrorCode(responseCode); kfBVF%90
return -2; //-2 represent access is error 70L{u+wIy
} P-VK=Y1q
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String sHeader; `|;R}"R;
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for(int i=1;;i++) 1
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); #!KbqRt
//Utility.log(in.readLine()); [|\~-6"7N|
sHeader=httpConnection.getHeaderFieldKey(i); RJ1Q.o
if(sHeader!=null) x(7K=K']
{ DGTSk9iK(
if(sHeader.equals("Content-Length")) o64&BpCK
{ pUWj,&t
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); T"XP`gk
break; :grJ}i-D
} DQd~!21\|
} TDdFuO'}
else i3*S`/]p
break; 'QjX2ytgX
} ?C6iJnm
} =usx' #rb
catch(IOException e){e.printStackTrace ();} 2![.Kbqa%
catch(Exception e){e.printStackTrace ();} AW4N#gt8',
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Utility.log(nFileLength); h&||Ql1
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return nFileLength;
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} 16[>af0<g
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//保存下载信息(文件指针位置) P'GX-H
private void write_nPos() TGGeTtk=
{ j8!fzJG
try{ [L8Bgw1
output = new DataOutputStream(new FileOutputStream(tmpFile)); 3HC aZ?Ry'
output.writeInt(nStartPos.length); qCn(~:
for(int i=0;i<nStartPos.length;i++) DF/p{s1Y3
{ ;=Jj{FoG%
// output.writeLong(nPos); eXWiTi@
output.writeLong(fileSplitterFetch.nStartPos); Z}TuVE
output.writeLong(fileSplitterFetch.nEndPos); ]L%qfy4
} Q2iS0#
output.close(); aHe/MucK
} 6$w)"Rq
catch(IOException e){e.printStackTrace ();} oori t
catch(Exception e){e.printStackTrace ();} PmO utYV
} "d>{hP
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//读取保存的下载信息(文件指针位置) F`3c uL[N
private void read_nPos() dX: (%_Mn
{ at${^,&
try{ z@^[.
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); meT~b
int nCount = input.readInt(); R3<>]/1p|P
nStartPos = new long[nCount]; f@T/^|`mh
nEndPos = new long[nCount]; snOd
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for(int i=0;i<nStartPos.length;i++) ;(fD R8
{ <Vm+Lt9
nStartPos = input.readLong(); ?2_Oa%M
nEndPos = input.readLong(); \B8tGog
} 3 :X3n\z
input.close(); c_<m8b{AEF
} mS5'q q;t
catch(IOException e){e.printStackTrace ();} \:]Clvc
catch(Exception e){e.printStackTrace ();} ,J"6(nk
} N_lQz(nG/2
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private void processErrorCode(int nErrorCode) kB{
{ W'u6F-$2
System.err.println("Error Code : " + nErrorCode); u~7mH
} j+"i$ln+s
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//停止文件下载 m.e+S,i
public void siteStop() 3
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{ x7)j?2
bStop = true; '=K
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for(int i=0;i<nStartPos.length;i++) [ Hw
fileSplitterFetch.splitterStop(); je@F:5
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} +>h}Uz
} A&X(\ c M
//负责部分文件的抓取 a~E@scD
**FileSplitterFetch.java Jn3cU
*/ b9Jah
package NetFox; gcDo o2RE
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import java.io.*; qpzzk9ba[
import java.net.*; 07 [%RG
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public class FileSplitterFetch extends Thread { VWDXEa9
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String sURL; //File URL l3kYfq{";"
long nStartPos; //File Snippet Start Position vM )2F
long nEndPos; //File Snippet End Position [P~6O>a5p
int nThreadID; //Thread's ID ZI.;7G@|
boolean bDownOver = false; //Downing is over XJJdCv^
boolean bStop = false; //Stop identical ZslH2#
FileAccessI fileAccessI = null; //File Access interface >Y,3EI\
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException [MLJs-*
{ :sO^b*e /
this.sURL = sURL; $7M/rF;N5X
this.nStartPos = nStart;
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this.nEndPos = nEnd; nADt8
nThreadID = id; YbCqZqk
fileAccessI = new FileAccessI(sName,nStartPos);//定位 %f??O|O3
} r*$$82s
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public void run() 2K >tI9);
{ !
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while(nStartPos < nEndPos && !bStop) Bfh[C]yy
{ V[E7mhqy
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try{ 6AS'MD%&
URL url = new URL(sURL); dFdll3bC
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /WIO@c
httpConnection.setRequestProperty("User-Agent","NetFox"); oL?[9aww
String sProperty = "bytes="+nStartPos+"-"; #$\cRLPg
httpConnection.setRequestProperty("RANGE",sProperty); ;=rM Ii
Utility.log(sProperty); [>`[1;a X
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InputStream input = httpConnection.getInputStream(); O_}ZSB8"
//logResponseHead(httpConnection); @\~qXz{6J
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byte[] b = new byte[1024]; TF\<`}akX
int nRead; #3uBq(-Z
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) iU)-YFO
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nStartPos += fileAccessI.write(b,0,nRead); 3F%Qq7v
//if(nThreadID == 1) $}[Tj0+:
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); $Cu/!GA4.>
} ^RN1?dXA
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Utility.log("Thread " + nThreadID + " is over!"); id^U%4J
bDownOver = true; Kd_WN;l
//nPos = fileAccessI.write (b,0,nRead); nMU#g])y)
} a
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catch(Exception e){e.printStackTrace ();} <`dF~
} V/5hEo Dt
} tVx.J'"Y
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//打印回应的头信息 FswMEf-|
public void logResponseHead(HttpURLConnection con) ^qpa[6D6x
{ ArkFC
for(int i=1;;i++) ,5\:\e0H
{ >l$vu-k)~4
String header=con.getHeaderFieldKey(i); @LY 5]og
if(header!=null) $Z;HE/3
//responseHeaders.put(header,httpConnection.getHeaderField(header)); A!v-[AI[
Utility.log(header+" : "+con.getHeaderField(header)); #( nheL
else T0_9:I`&
break; /,v:!*
} z(<
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} ErC~,5dj;n
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public void splitterStop() }\u~He%
{ 1at$_\{.(
bStop = true; ?xf59mY7
} /3%]Ggwe
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} c: *wev
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/* }jd[>zk
**FileAccess.java u2<:mu[|P
*//文件访问(定位,写) #py7emu
package NetFox; p!'wOThO`
import java.io.*; _|8"&*T^
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public class FileAccessI implements Serializable{ K=sQ_j.&Z
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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 %8o(x 0
RandomAccessFile oSavedFile; Cu;X{F'H
long nPos; J=K3S9:n]g
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public FileAccessI() throws IOException 4BEVG&Ks
{ k9 *0xukJ
this("",0); .M>u:,v
} 0nie>
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public FileAccessI(String sName,long nPos) throws IOException *7*g!
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{ bT{P1nUu
oSavedFile = new RandomAccessFile(sName,"rw"); SgXXitg9+
this.nPos = nPos; ?7&VT1
oSavedFile.seek(nPos); !y] Y'j
} OD1ns
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public synchronized int write(byte[] b,int nStart,int nLen) L0&!Qct
{ B8s|VI
int n = -1; =D[h0U
try{ }= <!j5:
oSavedFile.write(b,nStart,nLen); |e< U %v
n = nLen; 0_] aF8j
} %!.rP
catch(IOException e) SbI,9<
{ A`N;vq,
e.printStackTrace (); _^'k_a
} =kc{ Q@Dk
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return n; 41uSr 1
} 9MYt4
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} v'@LuF'e8
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/* ud#8`/!mq
**SiteInfoBean.java fzio8mKVX
*/ /6.b>|zF
package NetFox; Z\7bp&&
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public class SiteInfoBean { 0,3 ':Df
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private String sSiteURL; //Site's URL v}mmY>M%
private String sFilePath; //Saved File's Path $ta#]>{
private String sFileName; //Saved File's Name d!X?R}
private int nSplitter; //Count of Splited Downloading File Z"^@B2v
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public SiteInfoBean() puyL(ohem
{//nSplitter的缺省值为5 W P&zF$
//default value of nSplitter is 5 "O
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this("","","",5); _t[%@G>P
} bDNd
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) xd.C&Dx5
{ qprOxP
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sSiteURL= sURL; M:$nL
sFilePath = sPath; Dw[Q,SE
sFileName = sName; `ouzeu9}
this.nSplitter = nSpiltter; lq5E?B
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} iy"Kg]
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public String getSSiteURL() gk#rA/x
{ \nWpV7TSN
return sSiteURL; w1b
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} hH/O2
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public void setSSiteURL(String value) 9R[','x
{ nSiNSLv
sSiteURL = value; J;`~
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} NZ5~\k
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