/* -dRnozs6W
**SiteFileFetch.java T,'{0q
*/ Ufx^@%v
package NetFox; 2T3TD%
import java.io.*; C%c}lv8;^
import java.net.*; P:~Xaz\F
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public class SiteFileFetch extends Thread { euxkw]`h6
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SiteInfoBean siteInfoBean = null; //文件信息Bean ]V*ku%L0
long[] nStartPos; //开始位置 6snDv4
long[] nEndPos; //结束位置 0^%\! Xxq
FileSplitterFetch[] fileSplitterFetch; //子线程对象 3K{XT),
long nFileLength; //文件长度 A%Ov.~&\G
boolean bFirst = true; //是否第一次取文件 =J@M,mbHg
boolean bStop = false; //停止标志 bIvF5d>9#K
File tmpFile; //文件下载的临时信息 >Q(+H-w
DataOutputStream output; //输出到文件的输出流 ,(1n(FZ
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) `
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public SiteFileFetch(SiteInfoBean bean) throws IOException CsJ38]=Mt
{ 4Sj;38F
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siteInfoBean = bean; %:jVx
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); |)%]MK$;
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ?nVwT[
if(tmpFile.exists ()) Vki'pAN
{ @ve4rc/LI
bFirst = false; Ark+Df/
read_nPos(); 1/ZvcdYB
} /KL;%:7
else KBUClx?
{ C(=$0FIR
nStartPos = new long[bean.getNSplitter()]; h;q=<[h\
nEndPos = new long[bean.getNSplitter()]; m=saUhI*9
} {"^LUw8fd
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} m7dpr$J
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public void run() VXE85
{ \vH /bL
//获得文件长度 qcNu9Ih
//分割文件 Ou26QoT9XI
//实例FileSplitterFetch Gky
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//启动FileSplitterFetch线程 EnM }H9A
//等待子线程返回 9S<87sO
try{ FJ/>=2^B
if(bFirst) Z$UPLg3=;_
{ 2&e2/KEWR
nFileLength = getFileSize(); \+?>KpE,b
if(nFileLength == -1) ZsgJ6
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{ ( M > C
System.err.println("File Length is not known!"); S1Z~-i*w
} dkHye>
else if(nFileLength == -2) ?&ow:OH+
{ . J/x@
System.err.println("File is not access!"); kiah,7V/
} z;c~(o@4
else 7o+JQ&fF;
{ ;~A-32;Y4
for(int i=0;i<nStartPos.length;i++) Fwu:x.(
{ 0
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); fbl8:c)I
} qI] PM9
for(int i=0;i<nEndPos.length-1;i++) uG5RE
{ YmBo/I M
nEndPos = nStartPos[i+1]; ]+U:8*
} )A@
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nEndPos[nEndPos.length-1] = nFileLength; Ok0zgi
} NmH1*w<A
} g6s&nH`Z2
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//启动子线程 !Q/%N#
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; s8r|48I#;
for(int i=0;i<nStartPos.length;i++) G{ |0}
{ +t9$*i9`L
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), B%]yLJ
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), A:-M RhE9X
nStartPos,nEndPos,i); nnzfKn:J
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); jfLkp>2E'
fileSplitterFetch.start(); |D@/4B1P
} fZq_]1(/uP
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), B-R& v8F
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); "k;j@
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", )}Vb+
nEndPos = " + nFileLength); Bql5=p
// fileSplitterFetch[nPos.length-1].start(); ]j4Nl?5*x
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//等待子线程结束 $!'S7;*uW
//int count = 0; `4xnM`:L"
//是否结束while循环 Wzn!BgxRr
boolean breakWhile = false; JU6PBY~C'
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while(!bStop) )335X wA+
{ b0PQ;?R#V
write_nPos(); vp[;rDsIJ$
Utility.sleep(500); LR(Q.x
breakWhile = true; TKwMgC}<[
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for(int i=0;i<nStartPos.length;i++) $i|c6&
{ O<*l"fw3
if(!fileSplitterFetch.bDownOver) b`9J1p.;
{ ,k9@%{4 l
breakWhile = false; (G E)
break; u|G&CV#r
} vqeWt[W
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}
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if(breakWhile) 9Kpzj43
break; 1"hd5a
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|}?o=bO
//count++; CnXl 7"
//if(count>4) ,/bSa/x`
// siteStop(); bG|aQ2HW
} odPdWV,&*
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System.err.println("文件下载结束!"); !{WIN%O
} (V06cb*42[
catch(Exception e){e.printStackTrace ();} San=E@3}v!
} sC<
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//获得文件长度 m|CB')
public long getFileSize() u2FD@Xq?
{ 0afDqvrC6
int nFileLength = -1; z_ 01*O
try{ YF4?3K0F:k
URL url = new URL(siteInfoBean.getSSiteURL()); #s}cK
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); {hNvCk
httpConnection.setRequestProperty("User-Agent","NetFox"); (C&Lpt_
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int responseCode=httpConnection.getResponseCode(); 2_i9
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if(responseCode>=400) liuw!
{ yu~o9
processErrorCode(responseCode); AeZ__X
return -2; //-2 represent access is error /uNgftj
} W5f|#{&L:
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String sHeader; .boBo$f
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for(int i=1;;i++) `"-ln'nw
{ \y^Ho1Fj
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); p$:ERI
//Utility.log(in.readLine()); SKUri
sHeader=httpConnection.getHeaderFieldKey(i); Il8,g+W]
if(sHeader!=null) $Ith8p~
{ P@xb
if(sHeader.equals("Content-Length")) \\D(St
{ .^F(&c*['
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ?RMOy$L
break; HT%
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} nF)XZB0F
} *}@zxFe+
else 01_*^iCf5
break; CD"D^\z
} O,c}T7A'?w
} ;Pd nE~
catch(IOException e){e.printStackTrace ();} &hSABtr}
catch(Exception e){e.printStackTrace ();} )*CDufRFz
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Utility.log(nFileLength); C-:lM1
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return nFileLength; wr~Ydmsf
} *?o`90HHP[
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//保存下载信息(文件指针位置) !%lcn
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private void write_nPos() oLh2:c
{ _[:>!ekx
try{ "gQ-{ W
output = new DataOutputStream(new FileOutputStream(tmpFile)); ]E:K8E
output.writeInt(nStartPos.length); 3$yOv"`
for(int i=0;i<nStartPos.length;i++) ~ZuFMVR
{ fp)%Cr
// output.writeLong(nPos); [J-uvxD
output.writeLong(fileSplitterFetch.nStartPos); +5k^-
output.writeLong(fileSplitterFetch.nEndPos); |Q\O%
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} VUF$,F9
output.close(); h't!1u
} 4[P]+Z5b+
catch(IOException e){e.printStackTrace ();} <8 ,,pOb
catch(Exception e){e.printStackTrace ();} qtI42u{
} )/vse5EG+
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//读取保存的下载信息(文件指针位置) x&4gy%b
private void read_nPos() 7+Z%#G~T
{ g)M"Cx.
try{ hUo}n>Aa
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); >69- [#P!
int nCount = input.readInt(); 5Kw$QJ/
nStartPos = new long[nCount]; }NgevsV>;
nEndPos = new long[nCount]; Jjr&+Q^3Tu
for(int i=0;i<nStartPos.length;i++) n]Z() "D
{ KccI Yn~
nStartPos = input.readLong(); ~5@bWJ
nEndPos = input.readLong(); AW')*{/(Ii
} Gkr?M^@K
input.close(); cmu| d
} H-g
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catch(IOException e){e.printStackTrace ();} [(kC/W)!
catch(Exception e){e.printStackTrace ();} M. o}?
} L8WYxJ
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private void processErrorCode(int nErrorCode) IJQ"
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{ E/:mO~1< c
System.err.println("Error Code : " + nErrorCode); xJ(}?0h-X
} xro%AM
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//停止文件下载 ~^ <1k-
public void siteStop() I8%Uyap{
{ $eU oFa5A
bStop = true; 5BAGIO<w
for(int i=0;i<nStartPos.length;i++) pj9*$.{
fileSplitterFetch.splitterStop(); +v{g'
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} ^NB\[ &
} R[vA%G
//负责部分文件的抓取 - xE%`X
**FileSplitterFetch.java Po*G/RKu4W
*/ ??
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package NetFox; E-v#G~
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import java.io.*; HD~o]l=H
import java.net.*; L}hc|(:
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public class FileSplitterFetch extends Thread { l+XTn;cS
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String sURL; //File URL jV 982Y
long nStartPos; //File Snippet Start Position [~Vj(H=KwI
long nEndPos; //File Snippet End Position $Le|4Hj
int nThreadID; //Thread's ID J-U5_>S
boolean bDownOver = false; //Downing is over (ptk!u6
boolean bStop = false; //Stop identical &peUC n
FileAccessI fileAccessI = null; //File Access interface /BQB7vL
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 2AdO
{ AA &>6JB{
this.sURL = sURL; 1@<PcQBp
this.nStartPos = nStart; s%/x3anz=
this.nEndPos = nEnd; L}Rsg'U
nThreadID = id; {Lg]chJq?
fileAccessI = new FileAccessI(sName,nStartPos);//定位 ;%a
} r>,s-T!7
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public void run() Y2d(HD@
{ m4_ZGjmJM
while(nStartPos < nEndPos && !bStop) ~Iz{@Ep*
{ nmWo:ox4;(
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try{ EC`=nGF
URL url = new URL(sURL); -PiakX
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); MG-#p8
httpConnection.setRequestProperty("User-Agent","NetFox"); 8k_cC$*Ng
String sProperty = "bytes="+nStartPos+"-"; p6AF16*f0
httpConnection.setRequestProperty("RANGE",sProperty); i}=n6
Utility.log(sProperty); von<I
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InputStream input = httpConnection.getInputStream(); wmDO^}>ZP
//logResponseHead(httpConnection); 59#o+qo4
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byte[] b = new byte[1024]; 'B9q&k%<
int nRead; 5#U=x ,7e
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) k{C03=xk
{ zFm:=,9
nStartPos += fileAccessI.write(b,0,nRead); " 7g\X$
//if(nThreadID == 1) 1)t*l;.
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); B*OBXN>'P
} wO&+Bb\=
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Utility.log("Thread " + nThreadID + " is over!"); V {C{y5
bDownOver = true; 5*\]F}
//nPos = fileAccessI.write (b,0,nRead); t|?eNKVV9'
} V:
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catch(Exception e){e.printStackTrace ();} d=eIsP'h
}
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} C17$qdV/
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//打印回应的头信息 PrhGp
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public void logResponseHead(HttpURLConnection con) _^@ >I8ix
{ ["WWaCcx
for(int i=1;;i++) U28frRa
{ "_
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String header=con.getHeaderFieldKey(i); T!X`"rI
if(header!=null) +!cibTQTT
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 1b,MJ~g$
Utility.log(header+" : "+con.getHeaderField(header)); w&x$RP
else >Vph_98|
break; `5
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} #pnB+h&tE
} KD`*[.tT
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public void splitterStop() j1O_Az|3
{ "0aJE1)p:
bStop = true; oH;9s-Be
} 5pH6] $
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} Eg(.L,dj
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/*
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**FileAccess.java
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*//文件访问(定位,写) I9L7,~s
package NetFox; )x3p7t)#
import java.io.*; W!V-m
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public class FileAccessI implements Serializable{ }"M5"?
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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 a FL;E
RandomAccessFile oSavedFile; H,EGB8E2
long nPos; PZihC
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public FileAccessI() throws IOException &3 *#h
{ r"!xI
this("",0); <UwYI_OX
} 6 IRa$h>H
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public FileAccessI(String sName,long nPos) throws IOException Zp/$:ny
{ 3z% W5[E)
oSavedFile = new RandomAccessFile(sName,"rw"); `(M0I!t
this.nPos = nPos; 3fxcH
oSavedFile.seek(nPos); I ZBY*kr
} Y+{jG(rg.F
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public synchronized int write(byte[] b,int nStart,int nLen) fZb}-
{ Gn^m 541
int n = -1; $"ACg!=M
try{ ;tC$O~X
oSavedFile.write(b,nStart,nLen); JHa\"h
n = nLen; :,V&P_
} Jwpc8MQ
catch(IOException e) %+oqAYm+s
{ Hu+GN3`sx^
e.printStackTrace (); $f=6>Kn|^]
} sGx3O i
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return n; w+$~ds
} 4UHviuOo8
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} <R?S
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/* EHK+qrym
**SiteInfoBean.java :LCyxLI
*/ {DZ xK(
package NetFox; P !I Lji!
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public class SiteInfoBean { \1hQ7:f;\
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private String sSiteURL; //Site's URL QD-`jV3
private String sFilePath; //Saved File's Path _9'hmej
private String sFileName; //Saved File's Name qWJHb Dd
private int nSplitter; //Count of Splited Downloading File V''fmWo7
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public SiteInfoBean() FKUo^F?z
{//nSplitter的缺省值为5 BjGfUQ
//default value of nSplitter is 5 q:=jv6T#
this("","","",5); Dus!Ki~8(t
} 0lV;bVa%
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) N`~f77G
{ F\^\,hy
sSiteURL= sURL; ^7yaMB!
sFilePath = sPath; hkdF
sFileName = sName; FY`t7_Y?GV
this.nSplitter = nSpiltter; +X`&VO6~
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} 9bhubx\^/
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public String getSSiteURL() P@D\5}*6
{ =
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return sSiteURL; nw_s:
} UyFC\vQ
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public void setSSiteURL(String value) kP'm$+1or
{ p:W{c/tV
sSiteURL = value; 5nTcd@lX
} !a25cm5ys
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public String getSFilePath() B&_Z&H=
{ I0qJr2[X~
return sFilePath; I1rB,%p
} ;&'r yYrex
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public void setSFilePath(String value) 9tb-;|
{ bZr,jLEf
sFilePath = value; ?1zGs2Qs
} ^;F5ymb3U
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public String getSFileName() 1z0|uc
{ kKjcW` [
return sFileName; iSUu3Yv,_m
} UWhJkJsX
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public void setSFileName(String value) ,fqM>Q
{ L62%s[
sFileName = value; K|OPtYeb
} z 2jC48~
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public int getNSplitter() bub6{MQW8e
{ zG8g}FrzG;
return nSplitter; z"mpwmv5
} Go^TTL
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public void setNSplitter(int nCount) *A4eYHn@
{ [S8*b^t4
nSplitter = nCount; MT:VQ>fC
} UO#`Ak
} qVI0?B
x
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/* k{=dV
**Utility.java +S[3HX7H
*/ .gzfaxi
package NetFox; ``I[1cC
MJrPI a[pN
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public class Utility { #HW<@E
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public Utility() bar=^V)
{ 8ZqLGa]
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} %4Qs|CM)m
*,%$l+\h
//线程睡眠 u`.)O2)xU
public static void sleep(int nSecond) gujP{Z
{ &xhwOgI