/* DjCqh-&L
**SiteFileFetch.java Qk0R a_
*/ S{Kiy#ltWc
package NetFox; 61Bwb]\f/|
import java.io.*; ZXu>,Jy
import java.net.*; ?274uAO'
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public class SiteFileFetch extends Thread { y_'Ub{w
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SiteInfoBean siteInfoBean = null; //文件信息Bean hjU::m,WX
long[] nStartPos; //开始位置 "$~':) V"
long[] nEndPos; //结束位置 }v@dL3{f
FileSplitterFetch[] fileSplitterFetch; //子线程对象 T] R|qlZ
long nFileLength; //文件长度 5/q}`T9i%7
boolean bFirst = true; //是否第一次取文件 c CSs
boolean bStop = false; //停止标志 5Iy|BRU(%
File tmpFile; //文件下载的临时信息 2n,*Nd`
DataOutputStream output; //输出到文件的输出流 ~De"?
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) m- %E-nr
public SiteFileFetch(SiteInfoBean bean) throws IOException N/[p <
{ #=D) j
siteInfoBean = bean; :<ka3<0%
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); <vnHz?71c
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); b1?#81
if(tmpFile.exists ()) teOe#*
{ s6ZuM/Q
bFirst = false; jG6]A"pr
read_nPos(); \n" {qfn`r
} j>*S5y.{
else =4vy@7/
{ iMt:9|yF}8
nStartPos = new long[bean.getNSplitter()]; pe0F0Ruy
nEndPos = new long[bean.getNSplitter()]; @:;)~V
} _U$<xVnP
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} [NQOrcAQ
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public void run() ZufR{^W
{ OGBHos
//获得文件长度 "HX<,l8f%
//分割文件 Qf58ig-vCY
//实例FileSplitterFetch 2{M^,=^>
//启动FileSplitterFetch线程 VGLaN%|
//等待子线程返回 t$+?6E
try{ @M<|:Z %.@
if(bFirst) yTyj'-4
{ cO-7ke
nFileLength = getFileSize(); |$+3a
if(nFileLength == -1) xpNH?#&
{ u=Fv2
System.err.println("File Length is not known!"); :f Kl]XO
} <i<J^-W
else if(nFileLength == -2) :KH g&ZX7
{ Q.bXM?V)
System.err.println("File is not access!"); B*qi_{Gp
} Pih tf4i
else !y#"l$"xK
{ sD<a+Lw}x
for(int i=0;i<nStartPos.length;i++) ZjT,pOSyb
{ []x#iOnC&
nStartPos = (long)(i*(nFileLength/nStartPos.length)); oYHj~t
} l_3`G-`2
for(int i=0;i<nEndPos.length-1;i++) ,t}vz 7
{ -_ I_W&
nEndPos = nStartPos[i+1]; kM!kD4&
} d; [C6d
nEndPos[nEndPos.length-1] = nFileLength; (w&F/ynO:
} %/EVUN9=
} /TE_W@?^
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//启动子线程 +_s #2
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; .R`5Qds*l
for(int i=0;i<nStartPos.length;i++) |yvQ[U~PQ
{ 2`.cK 3
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hS_6
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ?=>+LqP
nStartPos,nEndPos,i); Ytgcs(
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Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); $r@
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fileSplitterFetch.start(); R[Ll59-
} |
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Kj V:|
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); "BD~xP(
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", %mL-$*
nEndPos = " + nFileLength); R{RwTN<
// fileSplitterFetch[nPos.length-1].start(); R5"K]~
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//等待子线程结束 7ByTnYe~S
//int count = 0; Gb"r|(!
//是否结束while循环 ~0?mBy!-O
boolean breakWhile = false; z+
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while(!bStop) EJ@?h(O
{ hp8%.V$f
write_nPos(); >oea{u
Utility.sleep(500); l;af~ef)'
breakWhile = true; ^L0d/,ik
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for(int i=0;i<nStartPos.length;i++) ,PlO8;5]
{ "-_fv5jL
if(!fileSplitterFetch.bDownOver) )X04K~6lY
{ u?>B)PW
breakWhile = false; .b\$MZ"(
break; Xm+8
} 6cpw~
} u83J@nDQ
if(breakWhile) HfcL%b%G8
break; OQ8 bI=?[x
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//count++; ~n[d4qV&
//if(count>4) t(GR)&>.2
// siteStop(); &GNxo$CG
} GGe,fb<k
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System.err.println("文件下载结束!"); lJ+0P2@h*
}
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catch(Exception e){e.printStackTrace ();} ^BUYjq%(`
} c;{Q,"9U
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//获得文件长度 !(qsD+
public long getFileSize() ub7zA!%
{ 6UevpDB
int nFileLength = -1; df*5,NV'-*
try{ iQ4);du
URL url = new URL(siteInfoBean.getSSiteURL()); H(2!1?N+
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); " .SJ~`S
httpConnection.setRequestProperty("User-Agent","NetFox"); Wqc)Fv70m
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int responseCode=httpConnection.getResponseCode(); {D!6%`HKV+
if(responseCode>=400) Op"M.]#
{ o8zy^zN$6
processErrorCode(responseCode); y'(Ne=y
return -2; //-2 represent access is error M(RZ/x
} DjI3?NN
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String sHeader; fR)m%m
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for(int i=1;;i++) >RPd$('T
{ ONx(]
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); BJgW,huLy
//Utility.log(in.readLine()); 53c 0
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sHeader=httpConnection.getHeaderFieldKey(i); ?|WoIV.
if(sHeader!=null) !iH-#B-
{ bKj%s@x
if(sHeader.equals("Content-Length")) PlF87j (
{ 8i|w(5m;
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); |l&vkRrN
break; RG3l.jL
} 3<k `+,'
} u\LiSGePN
else fLDg~;3
break; TlI<1/fP}
} fBgEnz/
} !_+8A/
catch(IOException e){e.printStackTrace ();} RletL)
catch(Exception e){e.printStackTrace ();} IP``O!WP
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Utility.log(nFileLength); %7#-%{
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return nFileLength; *.~6S3}
} X/z6"*(|/
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//保存下载信息(文件指针位置) T<JwD[(
private void write_nPos() SrFS#
{ ?+g`HTY u
try{ S!Omy:=;i
output = new DataOutputStream(new FileOutputStream(tmpFile)); nl(WJKq'
output.writeInt(nStartPos.length); K+Z+wA?
for(int i=0;i<nStartPos.length;i++) )uK{uYQl
{ CM<]ZG7
// output.writeLong(nPos); #
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output.writeLong(fileSplitterFetch.nStartPos); >H(i^z/c
output.writeLong(fileSplitterFetch.nEndPos); nB%;S
} D?C)BcN
output.close(); aO@7O*
} %FS$zOsgGK
catch(IOException e){e.printStackTrace ();}
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catch(Exception e){e.printStackTrace ();} 28/ ADZ
} mNb ?*3\
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//读取保存的下载信息(文件指针位置) %VzKqh
private void read_nPos() fLSXPvm
{ @%tRhG
try{ ~XyW&@
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); fwrJ!j
int nCount = input.readInt(); "t({D
nStartPos = new long[nCount]; 5DXR8mLoaJ
nEndPos = new long[nCount]; ~7$&WzD
for(int i=0;i<nStartPos.length;i++) Nc:({@I
{ ({-GOw46
nStartPos = input.readLong(); n6*En7IVh
nEndPos = input.readLong(); !L;\cl
} P6 ;'Sza
input.close(); Di@GY!
} N[<H7_/3
catch(IOException e){e.printStackTrace ();} r'dr9"-{
catch(Exception e){e.printStackTrace ();} "p/j; 6H
} /,MJq#@K
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private void processErrorCode(int nErrorCode) #'-Sh7ycW
{ UK$ms~H
System.err.println("Error Code : " + nErrorCode); v1|Bf8
} J[A14z]#`
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//停止文件下载 _bzqd"
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public void siteStop() a@@M+9Q
{ p}|.ZkyN
bStop = true; @WQK>-=(3
for(int i=0;i<nStartPos.length;i++) G
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fileSplitterFetch.splitterStop(); |y h\
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} rwniOQe
} DNR~_3Aq
//负责部分文件的抓取 )mJf|W!Z#
**FileSplitterFetch.java `C_jP|[e
*/ /erN;Oo%<
package NetFox; Dy]I8_
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import java.io.*; 4\pWB90V
import java.net.*; j
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public class FileSplitterFetch extends Thread { %*o8L6Hn
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String sURL; //File URL zP:cE
long nStartPos; //File Snippet Start Position FYb34LY
long nEndPos; //File Snippet End Position W(25TbQ
int nThreadID; //Thread's ID +&X%<S
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boolean bDownOver = false; //Downing is over -w;(cE
boolean bStop = false; //Stop identical v}sY|p"
FileAccessI fileAccessI = null; //File Access interface
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException t ?h kL
{ $s4Wkq
this.sURL = sURL; \eGKkSy
this.nStartPos = nStart; @)>D))+
this.nEndPos = nEnd; uK("<u|
nThreadID = id;
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fileAccessI = new FileAccessI(sName,nStartPos);//定位 9Ew7A(BG_3
} B-*E:O0y
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public void run() !@I}mQ ~
{ Uu"0rUzt
while(nStartPos < nEndPos && !bStop) QN>7~=`
{ rVtw-[p
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try{ .c^
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URL url = new URL(sURL); l;"Ab?P\
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); *9 Q^5;y
httpConnection.setRequestProperty("User-Agent","NetFox"); [EY`am8[
String sProperty = "bytes="+nStartPos+"-"; oyk>vIZ
httpConnection.setRequestProperty("RANGE",sProperty); <e)o1+[w
Utility.log(sProperty); a`E*\O'd
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v)f7};"z
InputStream input = httpConnection.getInputStream(); `_5GG3@Ff
//logResponseHead(httpConnection); cBYfXI0`
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byte[] b = new byte[1024]; `W `0Fwu9
int nRead; a=xT(G0Re
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) pilh@#_h
{ EPX8Wwf
nStartPos += fileAccessI.write(b,0,nRead); H@l}[hkP
//if(nThreadID == 1) F_ 7H!F
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8ga_pNe
} \OC6M` /
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Utility.log("Thread " + nThreadID + " is over!"); F?u^"}%Fc
bDownOver = true; y^Vw`-e
//nPos = fileAccessI.write (b,0,nRead); 1ndJ+H0H
} w%c
catch(Exception e){e.printStackTrace ();} |xr\H8:(!
} 1%J.WH6eQ
} `Zz uo16
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//打印回应的头信息 h?UVDzI!O
public void logResponseHead(HttpURLConnection con) a
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{ ;`v% sx#
for(int i=1;;i++) }:z5t,u6
{ h:/1X'
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String header=con.getHeaderFieldKey(i); i2J q|9,g
if(header!=null) [m'CR 4(|
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 2.Yi(r
Utility.log(header+" : "+con.getHeaderField(header)); HFo-4"
else +VU4s$w6
break; c 5`US
} 68R1AqU_
} ~V)?>)T
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public void splitterStop() mzD^Y<LTd
{ uXQ >WI@eF
bStop = true; "DSPPE&[c
} 5V-jMB
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} |@j_2Q,
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/* ,smF^l
**FileAccess.java Psa@@'w
*//文件访问(定位,写) znZ7*S >6\
package NetFox; ~# 7wdP
import java.io.*; _qWC4NMF(
9 1P4:6
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public class FileAccessI implements Serializable{ rUwE?Ekn/
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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 %*)2s,8
RandomAccessFile oSavedFile; 8
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long nPos; #Ogt(5Sd
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public FileAccessI() throws IOException ])y{BlZ
{ zW4O4b$T
this("",0); ]UNZd/hIL
} Fa3gJ[ZAqf
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public FileAccessI(String sName,long nPos) throws IOException j%& IL0
{ V`fL%du,3
oSavedFile = new RandomAccessFile(sName,"rw"); &K:' #[3V
this.nPos = nPos; #iis/6"
oSavedFile.seek(nPos); tLX,+P2|
} 2HOe__Ns
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public synchronized int write(byte[] b,int nStart,int nLen) ;Gm>O7"|@
{ r(uP!n1+
int n = -1; (;6s)z
try{ :%_q[}e
oSavedFile.write(b,nStart,nLen); HdQj?f3
n = nLen; Li`hdrO'ii
} ]TK=>;&
catch(IOException e) 3n(*E_n
{ t]m!ee8*X<
e.printStackTrace (); 02 f9 w V
} TGWdyIk
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return n; 3-Y=EH_0
} d><fu]'
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} Ao`_",E
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/* zW'/2W.
**SiteInfoBean.java 4DM L
*/ z
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package NetFox; ^eTZn[qH>w
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public class SiteInfoBean { ;?im(9h"v!
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private String sSiteURL; //Site's URL &|z544
private String sFilePath; //Saved File's Path ag]*DsBt
private String sFileName; //Saved File's Name \8_V(lU
private int nSplitter; //Count of Splited Downloading File ABWb>EZ8
+rQg7a}
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public SiteInfoBean() Ve:&'~F2 s
{//nSplitter的缺省值为5 |(%AM*n
//default value of nSplitter is 5 Z% Z"VoxH
this("","","",5); ggCr-
} T <A
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) }=pOiILvD
{ QV)}3pW
sSiteURL= sURL; Gm@iV,F%R
sFilePath = sPath; T{ nQjYb?
sFileName = sName; wG:$6
this.nSplitter = nSpiltter; UT-ewXh
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} n8FT<pUq
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public String getSSiteURL() vU9~[I`^p
{ }wkaQQh
return sSiteURL; -,@bA @&
} =|#w.(3y
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