/* gi/W3q3c6
**SiteFileFetch.java NA$ODK-
*/ ?zXlLud8
package NetFox; .6i +_B|
import java.io.*; NCx)zJ\S
import java.net.*; ^X*l&R_=R
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public class SiteFileFetch extends Thread { Kku@!lv
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SiteInfoBean siteInfoBean = null; //文件信息Bean m?)F@4]
long[] nStartPos; //开始位置 ns[h_g!j;
long[] nEndPos; //结束位置 *^%ohCUi
FileSplitterFetch[] fileSplitterFetch; //子线程对象 %G] W Oq=q
long nFileLength; //文件长度 `]2y=f<{X
boolean bFirst = true; //是否第一次取文件 N1]P3
boolean bStop = false; //停止标志 Wc/B_F?2
File tmpFile; //文件下载的临时信息 I \6^]pi,
DataOutputStream output; //输出到文件的输出流 B{Lzgw u;
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) $I3}%'`+
public SiteFileFetch(SiteInfoBean bean) throws IOException }Do$oyAV$G
{ V#-8[G6Ra
siteInfoBean = bean; 4L2TsuLw
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); lHgmljn5u
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); L3C'q
if(tmpFile.exists ()) `[4{]jX+<
{ eKqo6P:#f
bFirst = false; f:A1j\A?
read_nPos(); sTYA
} <(o) * Zmo
else z`y^o*qc]
{ ){i
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nStartPos = new long[bean.getNSplitter()]; u+]8Sq
nEndPos = new long[bean.getNSplitter()]; s !HOrhV
} L q;=UE
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} gs= (h*
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public void run() :W1B"T<
{ 4"%LgV`
//获得文件长度 M[ ,:NE4H
//分割文件 xR5zm%\
//实例FileSplitterFetch G+Zm
//启动FileSplitterFetch线程 k!wEPi]
//等待子线程返回 #6Fc-ysk:
try{ 140_WV?7
if(bFirst) c0:`+>p2
{
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nFileLength = getFileSize(); D3;#:
if(nFileLength == -1) DqBiBH[%h
{ mp>Ne6\Tu
System.err.println("File Length is not known!"); CF@j]I@{
} 8}!WJ2[R
else if(nFileLength == -2) 'di(5
{ /.[78:G\,
System.err.println("File is not access!"); hW-?j&yJ?
} ]hi5nA
else j |ZhGerp
{ e[L%M:e9U
for(int i=0;i<nStartPos.length;i++) IM~2=+
{ (wZ/I(4
nStartPos = (long)(i*(nFileLength/nStartPos.length)); S8)6@ECC
}
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for(int i=0;i<nEndPos.length-1;i++) &\M<>>IB
{ QetyuhS~
nEndPos = nStartPos[i+1]; Gmh6|Dsg
} 2lRE+_qz
nEndPos[nEndPos.length-1] = nFileLength; IX 2 dic'
} @L5s.]vg=
}
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//启动子线程 _air'XQ&!
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 7,EdJ[CR$
for(int i=0;i<nStartPos.length;i++) /~;om\7r
{ D1f}g
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), w|8T6W|w
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ORo,.#<
nStartPos,nEndPos,i); (<xl _L:*.
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); xr1,D5
fileSplitterFetch.start(); TKZ[H$Z
} W(,3j{d2i
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), _T.k/a
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 5}"9)LT@@w
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", EHX/XM
nEndPos = " + nFileLength); }w/6"MJ[n
// fileSplitterFetch[nPos.length-1].start(); 4,qhWe`/
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//等待子线程结束 78/,rp#'_
//int count = 0; =^`?O* /;
//是否结束while循环 ^ah9:}Ll
boolean breakWhile = false; xh9Os <
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while(!bStop) aLt2fB1 )
{ 6~c:FsZ)
write_nPos(); :[.**,0R
Utility.sleep(500); 'yR)z\)
breakWhile = true; =/MA`>
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for(int i=0;i<nStartPos.length;i++) &'<e9
{ YGf<!
if(!fileSplitterFetch.bDownOver) cMp#_\B
{ eNX!EN(^
breakWhile = false; x /E<@?*:
break; %{;1i
} :pvJpu$]
} 9B?-&t
if(breakWhile) {>n\B~*,"C
break; %,Lv},%Y
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//count++; oZ,_ G,b^
//if(count>4) EohvP[i
// siteStop(); K:(E"d;
} $bsD'Io
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System.err.println("文件下载结束!"); 0Tq=nYZA
} 2$s2u;
catch(Exception e){e.printStackTrace ();} =C 7 WQ
} fv/Nf"
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//获得文件长度 rc`}QoB)R
public long getFileSize() _ UGR+0'Q\
{ 5)iOG#8qJ
int nFileLength = -1; $*hqF1Q
try{ z1S
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URL url = new URL(siteInfoBean.getSSiteURL()); pq$-s7#
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); hU6oWm
httpConnection.setRequestProperty("User-Agent","NetFox"); iR]K!j2
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}WDzzjDR+
int responseCode=httpConnection.getResponseCode(); k{ ~0BK
if(responseCode>=400) ]+A%37
{ Wmc@:
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processErrorCode(responseCode); p(Ux]_s%
return -2; //-2 represent access is error +o-jMvK9
} ???` BF[|
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String sHeader; T7~H|%
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for(int i=1;;i++) AX;!-|bW
{ I>JBGR`j
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); MUn(ZnQy|
//Utility.log(in.readLine()); |ya.c\}q
sHeader=httpConnection.getHeaderFieldKey(i); #pcgfVl
if(sHeader!=null) W`v$-o-
{ @8*lqV2
if(sHeader.equals("Content-Length")) Yhte&,D"
{ n#^ii/H
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); h?'~/@
break; 'e/wjV
} @L$!hTaP
} dVe,;?+A
else Q>(a JF
break; je85G`{DC
}
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} <.".,Na(J0
catch(IOException e){e.printStackTrace ();} i936+[
catch(Exception e){e.printStackTrace ();} V:h7}T95
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Utility.log(nFileLength); \zKO5,qw
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return nFileLength; }Xvm(
;
} %+^Qs\j
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//保存下载信息(文件指针位置) lhC hk7l
private void write_nPos() PdtL
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{ 1xI
try{ YS:p(jtd
output = new DataOutputStream(new FileOutputStream(tmpFile)); _ee<i8_Va
output.writeInt(nStartPos.length); EpH_v`
for(int i=0;i<nStartPos.length;i++) jn(%v]
{ F1meftK
// output.writeLong(nPos); 9y&bKB2,
output.writeLong(fileSplitterFetch.nStartPos); J6Vx7
output.writeLong(fileSplitterFetch.nEndPos); _"*}8{|
} 6H=gura&
output.close(); 0X3yfrim
} \PWH(E9
catch(IOException e){e.printStackTrace ();} ;y_ ]w6|n
catch(Exception e){e.printStackTrace ();} S5V:H Rj{?
} #%EHcgF
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//读取保存的下载信息(文件指针位置) ``%yVVg}
private void read_nPos() T'{9!By,P
{ k/(]1QnW
try{ w2db=9
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); j#0JD!Vr
int nCount = input.readInt(); ||?@pn\
nStartPos = new long[nCount]; $<yhEvv
nEndPos = new long[nCount]; .5uqc.i"f
for(int i=0;i<nStartPos.length;i++) =*1NVi $n
{ e3ce?gk
nStartPos = input.readLong(); zz
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nEndPos = input.readLong(); 3)yL#hXg)
} |kP utB
input.close(); VD<z]@
} 2vWn(6`
catch(IOException e){e.printStackTrace ();} Q8MIpa!:
catch(Exception e){e.printStackTrace ();} 7Ja*T@ ! h
} ;tSAQ
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private void processErrorCode(int nErrorCode) tv26eK
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{ ,J8n}7aI
System.err.println("Error Code : " + nErrorCode); ^qnmKA>"F
} m7DKC,
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//停止文件下载 g(Q1d-L4e
public void siteStop() z_N";Rn
{ ,yA[XAz~U
bStop = true; S*$?~4{R
for(int i=0;i<nStartPos.length;i++) {`Gd
fileSplitterFetch.splitterStop(); d$jwh(Ivs
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} fbU3-L?
} lLDZ#'&An
//负责部分文件的抓取 ] |nW
**FileSplitterFetch.java R3;%eyu
*/
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package NetFox; s M*ay,v;
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import java.io.*; P:t .Nr"
import java.net.*; a eeor
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public class FileSplitterFetch extends Thread { -rn6ZSD)
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String sURL; //File URL tM^4K r~o,
long nStartPos; //File Snippet Start Position "L:4 7!8
long nEndPos; //File Snippet End Position &iVdqr1,
int nThreadID; //Thread's ID 2 U]d1
boolean bDownOver = false; //Downing is over r34MDUZdI
boolean bStop = false; //Stop identical RFyMRE!?
FileAccessI fileAccessI = null; //File Access interface y;uR@{
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException r`.N?
{ [IQ|c?DxpL
this.sURL = sURL; msM1K1er
this.nStartPos = nStart; |PlNVd2
this.nEndPos = nEnd; Hddc-7s
nThreadID = id; kQ}n~Hn
fileAccessI = new FileAccessI(sName,nStartPos);//定位 >a,D8M?
} c%J6!\
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public void run() 4a"Fu<q
{ u}gavG l
while(nStartPos < nEndPos && !bStop) P=5+I+
{ ANy*'/f
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try{ D**GC
URL url = new URL(sURL); Cq"KKuf
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); hU8Y&R)=9
httpConnection.setRequestProperty("User-Agent","NetFox"); `X}:(O^GO
String sProperty = "bytes="+nStartPos+"-"; 0n}13u=}
httpConnection.setRequestProperty("RANGE",sProperty); M[gL7-%w\
Utility.log(sProperty); yGf7k>K'
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InputStream input = httpConnection.getInputStream(); E5d$n*A
//logResponseHead(httpConnection); Z0jgUq`r
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byte[] b = new byte[1024]; ~vF a\7sf
int nRead; (
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while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) $+!dP{
{ ba);f[>
nStartPos += fileAccessI.write(b,0,nRead); 2t-w0~O
//if(nThreadID == 1) ^,acU\}VqP
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); NEIkG>\7q
} >F7w]XH
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Utility.log("Thread " + nThreadID + " is over!"); )rD!4"8/A
bDownOver = true; x8PT+KC
//nPos = fileAccessI.write (b,0,nRead); jdP)y]c
} D j&~x
catch(Exception e){e.printStackTrace ();} rP3HR5
} 8w&-O~M
} UJ)pae
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//打印回应的头信息 IW3k{z
public void logResponseHead(HttpURLConnection con) %w*)7@,+-
{ fkBL`[v)4
for(int i=1;;i++) hMDd*<%l
{ ?Gki0^~J
String header=con.getHeaderFieldKey(i); ?;XEb\Kf
if(header!=null) h'):/}JPl
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 2Wz8E2.
Utility.log(header+" : "+con.getHeaderField(header)); _\}'5nmw\
else d,V#5l-6
break; ,Of^xER`
} O1J&Lwpk,
} N1c=cZDV
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public void splitterStop() (+>
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{ [1VA`:?W
bStop = true; QPJ\Iu@D$
} d(T4Kd$r
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} ,#A(I#wL~
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/* \k.`xG?
**FileAccess.java ?Z7`TnG$uf
*//文件访问(定位,写) r~t`H*C)}
package NetFox; jxh:z
import java.io.*; WQK<z!W5
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public class FileAccessI implements Serializable{ jT{T#_
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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 2bp@m;g$
RandomAccessFile oSavedFile; LL^KZ-
long nPos; K4c:k;
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public FileAccessI() throws IOException .+9hm|
{ *@2Bh4
this("",0); VY0.]t
} n~N>;mP
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public FileAccessI(String sName,long nPos) throws IOException };/QK*
{ zUfq.
oSavedFile = new RandomAccessFile(sName,"rw"); /`*{57/3
this.nPos = nPos; =}^NyLE?
oSavedFile.seek(nPos); eUyF<j
} Jl
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public synchronized int write(byte[] b,int nStart,int nLen) %tCv-aX4
{ RgJ@J/p"
int n = -1; [XfR`@
try{ U
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oSavedFile.write(b,nStart,nLen); ?[D3-4
n = nLen; F "@% 7xy
} x84!/n^z
catch(IOException e) -aoYoJ '
{ 4T@:_G2b
e.printStackTrace (); _gvFs%J
} ;[v!#+yml
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return n; jEc_!Q
} YG "Ta|@5
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} IGdiIhH~2
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/* }u Y2-l
**SiteInfoBean.java 6K/RO)
*/ U<Pjn)M~B
package NetFox; p8rh`7
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public class SiteInfoBean { ;FPx
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private String sSiteURL; //Site's URL p@<Q?
private String sFilePath; //Saved File's Path hnnB4]c
private String sFileName; //Saved File's Name 2w?q7N%
private int nSplitter; //Count of Splited Downloading File 3<0b_b
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public SiteInfoBean() 6#=jF[
{//nSplitter的缺省值为5 *Rgr4-eS
//default value of nSplitter is 5 H|9t5
this("","","",5); aO6\e>
} &qv~)ZM$
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) o2/:e
{ s\*L5{kiSl
sSiteURL= sURL; 4>JSZ6i#n
sFilePath = sPath; KkvcZs'4m
sFileName = sName; L4By5)
this.nSplitter = nSpiltter; o3J#hQrl
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} o+A7hBM^
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public String getSSiteURL() H4$qM_N
{ 'o AmA=
return sSiteURL; GABZsdFZ!
} xL}i9ozZ
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public void setSSiteURL(String value) LUOjaX
{ JGs:RD'
sSiteURL = value; j-<]OOD
} j3j?2#vR
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public String getSFilePath() m%'nk"p9
{ L9GLjRp-
return sFilePath; q+g,?;Yx
} b--=GY))F
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public void setSFilePath(String value) >O'\
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{ _~kw^!p>Kr
sFilePath = value; 'Wlbh:=$
} bJd|mm/v
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public String getSFileName() @rl5k(
{ r- 8Awa
return sFileName; 7!O"k#
} Z,&