/* 8x{B~_~
**SiteFileFetch.java u}bf-;R
*/ ow=UtA-^O
package NetFox; Si9Z>MR
import java.io.*; @XD+' {]
import java.net.*; gnp~OVDqfL
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public class SiteFileFetch extends Thread { \o-&f:
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SiteInfoBean siteInfoBean = null; //文件信息Bean I
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long[] nStartPos; //开始位置 )Rat0$6
long[] nEndPos; //结束位置 8n BL\{'B[
FileSplitterFetch[] fileSplitterFetch; //子线程对象 Ioy
long nFileLength; //文件长度 8mLP5s!7
boolean bFirst = true; //是否第一次取文件 L\{IljA
boolean bStop = false; //停止标志 Lj\/Ji_
File tmpFile; //文件下载的临时信息 ;|p$\26S)%
DataOutputStream output; //输出到文件的输出流 g[>\4B9t
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) "N:XzG
public SiteFileFetch(SiteInfoBean bean) throws IOException l JP1XzN_
{ @;xMs8@
siteInfoBean = bean; yL^UE=#C_
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); X0;4_,=
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); H
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if(tmpFile.exists ()) ,6!rR,0
{ plu$h-$d
bFirst = false; *rZ^^`4R
read_nPos(); ^ 5VK>
} GhY1k";
else `u!l3VZ/4
{ 5m=I*.qE
nStartPos = new long[bean.getNSplitter()]; MC((M,3L
nEndPos = new long[bean.getNSplitter()]; bb42v7?
} 7J28JK
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} 2-zT$`[]J
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public void run() MF60-VE
{ _mS!XF~`P
//获得文件长度 0U/K7sZ
//分割文件 Dlo xrdOY&
//实例FileSplitterFetch DcIvhB p
//启动FileSplitterFetch线程 cr?7O;,
//等待子线程返回 =z?%;4'|
try{ &bqT/H18
if(bFirst) 8;y&Pb~)
{ DcMJ^=r8O:
nFileLength = getFileSize(); vB37M@wm
if(nFileLength == -1) dt[k\ !-v
{ e}@)z3Q<l
System.err.println("File Length is not known!"); `6y{.$ z
} .*$OQA
else if(nFileLength == -2) O9'x-A%
{ ;
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System.err.println("File is not access!"); ri C[lB
} E|YdcS
else ]Mj/&b>"e
{ #>Y'sd5'A
for(int i=0;i<nStartPos.length;i++) )5%C3/Dl!
{ {ng"=3+n
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 4`Nt{
} -IlJ^Al4
for(int i=0;i<nEndPos.length-1;i++) 8,O33qwH
{ Gc.P,K/hr
nEndPos = nStartPos[i+1]; 2nb:)
} ;o/>JHGj
nEndPos[nEndPos.length-1] = nFileLength; Hv]7e|
} "M|P+A
} #U=X NU}k
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//启动子线程 .yT8NTu~0j
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; mD:IO
for(int i=0;i<nStartPos.length;i++) z3t~}aL
{ 4>^K:/y
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ?Y:x[pOe
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ;)Kh;;e
nStartPos,nEndPos,i); Vh3Ijn
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); H9 C9P17
fileSplitterFetch.start(); Y\],2[liF
} y5= `ap
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Ae^X35
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); p
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// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", @ZN^1?][
nEndPos = " + nFileLength); 3$vRW.c\q
// fileSplitterFetch[nPos.length-1].start(); Md)zEj`\
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//等待子线程结束 J68j=`Y
//int count = 0; o01kYBD
//是否结束while循环 Mcw4!{l`
boolean breakWhile = false; sDgXU@
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while(!bStop) lcON+j
{ *5sBhx
write_nPos(); ?^'
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Utility.sleep(500); UE _fpq
breakWhile = true; _u"nvgVz9
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for(int i=0;i<nStartPos.length;i++) lX:|iB
{ OE)~yKy
if(!fileSplitterFetch.bDownOver) ?EMK8;
{ X.ONa_
breakWhile = false; 2c<&eX8"
break; NT%W;)6m9
} :J}t&t
} M-NV_W&M
if(breakWhile) <1w/hy&mWN
break; h:XzUxL\
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//count++; H-rWDN#
//if(count>4) /Y[~-Y+!,
// siteStop(); PIA)d-Z
} 4vK8kkW1
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System.err.println("文件下载结束!"); BE&B}LfvfO
} Xqp|VbDca
catch(Exception e){e.printStackTrace ();} *fO3]+)d+
} 8T;IZ(s
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//获得文件长度 0YH+B
public long getFileSize() tC8(XMVx
{ C8@TZ[w
int nFileLength = -1; u{&B^s)k.
try{ =9L$L|W
URL url = new URL(siteInfoBean.getSSiteURL()); {-9jm%N
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); iK;dU2h
httpConnection.setRequestProperty("User-Agent","NetFox"); +&tgJ07A
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int responseCode=httpConnection.getResponseCode(); HQ!Xj.y
if(responseCode>=400) puSLqouTM
{ C2]Kc{4
processErrorCode(responseCode); B;Nl~Y| \
return -2; //-2 represent access is error SEQ%'E5-'
} T1B|w"In
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String sHeader; #Z=tJ
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for(int i=1;;i++) F}Mhs17!|
{ Jsg
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ;S$Ll*f>D
//Utility.log(in.readLine()); 5yh/0i5 |
sHeader=httpConnection.getHeaderFieldKey(i); JnD{J`:
if(sHeader!=null) &a> lWE
{ y$Zj?Dd#
if(sHeader.equals("Content-Length")) >1L=,M
{ t^=U*~
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); mIZwAKo
break; O|kKwadC
} JL}\*
} u#W5`sl
else ?<X(]I.j
break; TL= YQA
}
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} CozKyt/r7
catch(IOException e){e.printStackTrace ();} P#kGX(G9!
catch(Exception e){e.printStackTrace ();} D| I Ec?
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Utility.log(nFileLength); (J$\-a7<f
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return nFileLength; RR1A65B
} J}spiVM
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//保存下载信息(文件指针位置) bTmL5}n
private void write_nPos() #$S}3
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{ ;:&?=d
try{ VBoMT:#
output = new DataOutputStream(new FileOutputStream(tmpFile)); ~ <0Z>qr
output.writeInt(nStartPos.length); :L?_Y/K
for(int i=0;i<nStartPos.length;i++) `Y?t@dd
{ hVoNw6fE
// output.writeLong(nPos); $KV&\Q3\0
output.writeLong(fileSplitterFetch.nStartPos); PsjbR
output.writeLong(fileSplitterFetch.nEndPos); ]*"s\ix
} XY7Qa!>7j
output.close(); a+41|)pt
} /%x7+Rl\-^
catch(IOException e){e.printStackTrace ();} !&kL9A).
catch(Exception e){e.printStackTrace ();} +,'T=Ic{
} zbw7U'jk
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//读取保存的下载信息(文件指针位置) S^RUw
private void read_nPos() qG8s;_G
{ qX:B4,|ck
try{ ,1n
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DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); v vu<:16
int nCount = input.readInt(); S[M4ukYK
nStartPos = new long[nCount]; A(6xg)_XQ
nEndPos = new long[nCount]; -H(vL=
for(int i=0;i<nStartPos.length;i++) BWPP5X9
{ Gu(lI ~
nStartPos = input.readLong(); .,2V5D-${
nEndPos = input.readLong(); HP2wtN{Zs
} rp!
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input.close(); E,G<_40
} =y ]Jl,_.
catch(IOException e){e.printStackTrace ();} i`U:gw
catch(Exception e){e.printStackTrace ();} a^nAZ
} uq7T{7~<
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private void processErrorCode(int nErrorCode) y+mElG$F
{ kka"C]!
System.err.println("Error Code : " + nErrorCode); 7 &)])
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} vL_zvXA
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//停止文件下载 H>7dND2;
public void siteStop() ~2}Pl)
{ 3*S[eqMJc
bStop = true; Ng<1Sd|MV
for(int i=0;i<nStartPos.length;i++) ~&G4)AM
fileSplitterFetch.splitterStop(); g#^|oYuH6
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} HQVh+ (
} 7Ur?ep
//负责部分文件的抓取 WnxEu3U
**FileSplitterFetch.java '8Wv.X0`
*/ _."E%|5
package NetFox; I=dGq;Jaz
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import java.io.*; V%
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import java.net.*; 4Kp L>'Q=
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public class FileSplitterFetch extends Thread { DQ6jT@ZDH
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String sURL; //File URL ?T*";_o,B
long nStartPos; //File Snippet Start Position XF,<i1ZlM
long nEndPos; //File Snippet End Position )q^ Bj$
int nThreadID; //Thread's ID m@qqVRn#)
boolean bDownOver = false; //Downing is over ;b~~s.+
boolean bStop = false; //Stop identical B!,yfTk]
FileAccessI fileAccessI = null; //File Access interface L/r{xS
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException U{1z;lJ
{ \ElX~$fS
this.sURL = sURL; 1M5 -pZ[D
this.nStartPos = nStart; Y(i?M~3\t
this.nEndPos = nEnd; /A(NuB<Pq
nThreadID = id; hw,^G5m
fileAccessI = new FileAccessI(sName,nStartPos);//定位 >]$aoA#
} }C6@c1myq-
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public void run() 5{l1A(b
{ %`\]Y']R
while(nStartPos < nEndPos && !bStop) 9U<Hf32
{ &TT":FPR
V/y=6wUiSl
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try{ R_e)mkE
URL url = new URL(sURL); M []OHw
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); jMU9{Si
httpConnection.setRequestProperty("User-Agent","NetFox"); }B)jq`a?|\
String sProperty = "bytes="+nStartPos+"-"; Vewzo1G2
httpConnection.setRequestProperty("RANGE",sProperty); y4F^|kS) [
Utility.log(sProperty); ,b'4CF
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InputStream input = httpConnection.getInputStream(); <MZi<Z`
//logResponseHead(httpConnection); 'U)8rR
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byte[] b = new byte[1024]; pMN<p[MB
int nRead; ROoE%%8I
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) -<oZ)OfU
{ j[DIz@^
nStartPos += fileAccessI.write(b,0,nRead); a-PGW2G
//if(nThreadID == 1) g_ M-F
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); a!t
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} *T4ge|zUc
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Utility.log("Thread " + nThreadID + " is over!"); <-)9>c:k
bDownOver = true; :kp0EiJ
//nPos = fileAccessI.write (b,0,nRead); T-P@u-DU
} =lrN'$z?%
catch(Exception e){e.printStackTrace ();} 8XbR
} X<xqT
} (!n-Age
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//打印回应的头信息 U42\.V0
public void logResponseHead(HttpURLConnection con) 1g i}H)
{ q<XcOc5
for(int i=1;;i++) 7Po/_%
{ E^syrEz
String header=con.getHeaderFieldKey(i); Ekf2NT
if(header!=null) v MWC(m
//responseHeaders.put(header,httpConnection.getHeaderField(header)); "k>bUe|RG
Utility.log(header+" : "+con.getHeaderField(header)); s^PmnFR
else ` u=<c
break; h.b+r~u
} >B~?dT m
} s1=u{ET
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public void splitterStop() >4'21,q
{ VRhRwdC
bStop = true; A_Gp&acs$
} =g2\CIlVU6
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} jr1Se9u D
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/* '%O\E{h
**FileAccess.java J~2CD*v
*//文件访问(定位,写) m){&:Hs
package NetFox; j?J=w=.Nx
import java.io.*; ^K>pT}u
* D3
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public class FileAccessI implements Serializable{ ~[;{
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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 ^z?=?%{
RandomAccessFile oSavedFile; ]}_,U!`8
long nPos; "0Y&~q[=
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public FileAccessI() throws IOException +}]wLM}\UF
{ 8 )`5P\
this("",0); #ZwY?T
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} "2K|#,%N
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public FileAccessI(String sName,long nPos) throws IOException EM~7#Y
{ B2"+Hwbk
oSavedFile = new RandomAccessFile(sName,"rw"); )XZ,bz*jn
this.nPos = nPos; iy9VruT<