/* [~f%z(vI
**SiteFileFetch.java &p=|z2 J
*/ X7NRQ3P@
package NetFox; ',*I=JW;
import java.io.*; (^eE8j/K
import java.net.*; vh
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public class SiteFileFetch extends Thread { 0O!%NL[,
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SiteInfoBean siteInfoBean = null; //文件信息Bean d3 fE[/oU
long[] nStartPos; //开始位置 wvx
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long[] nEndPos; //结束位置 &>i+2c~
FileSplitterFetch[] fileSplitterFetch; //子线程对象 3/}=x<ui
long nFileLength; //文件长度 L
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boolean bFirst = true; //是否第一次取文件 NZi5rXN
boolean bStop = false; //停止标志 - FA#hUK$
File tmpFile; //文件下载的临时信息 sJt&`k Z
DataOutputStream output; //输出到文件的输出流 |Wi$@sWO
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) +]`MdOu
public SiteFileFetch(SiteInfoBean bean) throws IOException _BHb0zeot
{ 9.#\GI ;
siteInfoBean = bean; ;=F^G?p^
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); D
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tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 7KuTC%7
if(tmpFile.exists ()) '#u|RsZ
{ DWm$:M4z
bFirst = false; y9Yh%M(
read_nPos(); e,`+6qP{
} Z^>3}\_v
else wH{lp/
{ c 6E@+xU
nStartPos = new long[bean.getNSplitter()]; JgYaA*1X
nEndPos = new long[bean.getNSplitter()]; <y-KWWE
} #E{OOcM
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} m`4Sp#m
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public void run() NrNbNFfo
{ NnrX64|0
//获得文件长度 jP@H$$-=wH
//分割文件 ylmf^G@JC
//实例FileSplitterFetch Kn=P~,FaG3
//启动FileSplitterFetch线程 ;gK+AU
//等待子线程返回 J--9VlC'
try{ c5R58#XK=
if(bFirst) =WFMqBh<`
{ ,K3)f.ArYc
nFileLength = getFileSize(); G/N'8Q)
if(nFileLength == -1) 5s;HF |2x
{ ^|>vK,q$I
System.err.println("File Length is not known!"); 2@uo2]o)
} /NMd GKr
else if(nFileLength == -2) !OPa
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{ ]{.rx),
System.err.println("File is not access!"); JV(|7Sk
} qD7#q]
else `[VoW2CLH+
{ 3xp%o5K
for(int i=0;i<nStartPos.length;i++) 1ncY"S/VO
{ % ]r@vjeyd
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 6$9n_AS
} oizD:|
for(int i=0;i<nEndPos.length-1;i++) )/Ee#)z*
{ ?9OiF-:n
nEndPos = nStartPos[i+1]; 0Evmq3,9
} {-7];e
nEndPos[nEndPos.length-1] = nFileLength; +>44'M^Z|(
} T%
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} [0Z
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//启动子线程 j:O=9
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; _dmgNbs
for(int i=0;i<nStartPos.length;i++) 2\CFt;fk
{ ;]KGRT
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), O}Fp\"
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), TL1pv l
nStartPos,nEndPos,i); lRZt))3
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); u"?cmg<.1
fileSplitterFetch.start(); $X
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} {S'xZ._=
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >|XQfavE
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); @&83/U?
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Gv?'R0s
nEndPos = " + nFileLength); "
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// fileSplitterFetch[nPos.length-1].start(); C.}Z5BwS
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//等待子线程结束 d Am(uJ
//int count = 0; LXJ"ct
//是否结束while循环 =S|SQz5%w
boolean breakWhile = false; 9fzbR~s
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while(!bStop) Jc-0.^]E}
{ r2M._}bF
write_nPos(); h<$V ry}
Utility.sleep(500); hGcOk[m 4
breakWhile = true; r*p<7
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for(int i=0;i<nStartPos.length;i++) <&t^&6k
{ }ytc oIuLf
if(!fileSplitterFetch.bDownOver) m!$"-nh9
{ ]9l=geZd%;
breakWhile = false; c03A_2%
break; 4 "@BbVYR
} .%M=dL>
} % )i?\(/
if(breakWhile) RI')iz?
break; vaxNF%^~yN
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//count++; kbI:}b7H
//if(count>4) n-#?6`>a
// siteStop(); gk>A
} ALiA+k N
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System.err.println("文件下载结束!"); AVZ -g/<
} _`+
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catch(Exception e){e.printStackTrace ();} g%4-QCZ,
} K9mL1 [B
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//获得文件长度 yCf*ts1
public long getFileSize() 53=VIN]
{ #?@k=e\
int nFileLength = -1; ZcYxH|Gn
try{ i
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URL url = new URL(siteInfoBean.getSSiteURL()); $83TA><a
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); OU]!2[7c
httpConnection.setRequestProperty("User-Agent","NetFox"); so9h6K{qcp
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int responseCode=httpConnection.getResponseCode(); 5$`i)}:s
if(responseCode>=400) #6 e
{ `|8)A)ZVT
processErrorCode(responseCode); u#/Y<1gn
return -2; //-2 represent access is error %F3M\)jU
} %A,4vLe~6
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String sHeader; 17a'C
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for(int i=1;;i++) Zoh2m`6
{ Be68 Fu0
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); RnE=T/VZJ
//Utility.log(in.readLine()); xx)egy_
sHeader=httpConnection.getHeaderFieldKey(i);
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if(sHeader!=null) /(bPc12
{ Egi<m
if(sHeader.equals("Content-Length")) ssoIC
{ ]uI#4t~
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); W~$YKBW
break; V)mRG`L
} (%rO'X
} ;$ D*,W
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else ]S[M]-I
break; 6#MIt:#
} !_QE|tVeR
} lM3UjR|@
catch(IOException e){e.printStackTrace ();} n-be8p)-
catch(Exception e){e.printStackTrace ();} *r6+Vz
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Utility.log(nFileLength); \S{ise/U
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return nFileLength; QeuIAs* _
} w^s|YF=c
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//保存下载信息(文件指针位置) (|(#~o]40t
private void write_nPos() _Jn-# du
{ _Y4%Fv>@
try{ t4R=$
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output = new DataOutputStream(new FileOutputStream(tmpFile)); aze}koNE
output.writeInt(nStartPos.length); Ms;:+JI
for(int i=0;i<nStartPos.length;i++) Z
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{ C:\BvPoO
// output.writeLong(nPos); ~e~iCyW;S
output.writeLong(fileSplitterFetch.nStartPos); .S>:-j'u
output.writeLong(fileSplitterFetch.nEndPos); 1@JAY!yoo_
} Bd*:y qi
output.close(); Cb~_{$ A
} (, Il>cR4
catch(IOException e){e.printStackTrace ();} .uG|Vq1v
catch(Exception e){e.printStackTrace ();} 494"-F 6
} d[;S n:B
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//读取保存的下载信息(文件指针位置) 3qR%Mf'
private void read_nPos() ;HtHN
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{ ?xu5/r<
try{ rH"&
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); $TyV<
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int nCount = input.readInt(); S
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nStartPos = new long[nCount]; Lt$LXE
nEndPos = new long[nCount]; P!q!+g
for(int i=0;i<nStartPos.length;i++) (%=[J/F/
{ ~:~-AXaMT
nStartPos = input.readLong(); E96FwA5
nEndPos = input.readLong(); 4loG$l+a1
} H(GWC[tv
input.close(); PzbLbH8A
} *^e06xc:
catch(IOException e){e.printStackTrace ();} ^"WrE(3
catch(Exception e){e.printStackTrace ();} d%FD=wm
} Pb4%"9`
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private void processErrorCode(int nErrorCode) \_;zm+ <{
{ &,/_"N"?D
System.err.println("Error Code : " + nErrorCode); #!(OTe L
} \yP\@cpY{
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//停止文件下载 BO)K=gl;8
public void siteStop() :Lu=t3#
{ W9nmTz\8
bStop = true; 2x%Xx3!
for(int i=0;i<nStartPos.length;i++) qOAK`{b
fileSplitterFetch.splitterStop(); Qxr&zT7f
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} ?.Z4GWyXa
} <3i2(k
//负责部分文件的抓取 ;/T=ctIs
**FileSplitterFetch.java k`ulDQu
*/ u
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package NetFox; r!A1Sfo4P
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import java.io.*; !cS
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import java.net.*; Y|$3%t
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public class FileSplitterFetch extends Thread { AG/?LPJ
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String sURL; //File URL RS'!>9I
long nStartPos; //File Snippet Start Position }j9V0`Q
long nEndPos; //File Snippet End Position d/oxRzk'L
int nThreadID; //Thread's ID ,ND}T#yTR
boolean bDownOver = false; //Downing is over +72[*_ <
boolean bStop = false; //Stop identical xaiA2
FileAccessI fileAccessI = null; //File Access interface gbF^m`A>%+
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException v53qpqc
{ Ovu!G
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this.sURL = sURL; [AgS@^"sf5
this.nStartPos = nStart; 6bj.z
this.nEndPos = nEnd; Fv_rDTo
nThreadID = id; gYb}<[O!
fileAccessI = new FileAccessI(sName,nStartPos);//定位 {oQ.y
} ?VVtEmIN
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public void run() Y)="of
{ U8Rko)
while(nStartPos < nEndPos && !bStop) rq=D[vX\N(
{ ?U3X,uv5J
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try{ ipy1tXc
URL url = new URL(sURL); Qry?h*p+`
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Wl!|+-
httpConnection.setRequestProperty("User-Agent","NetFox"); *htv:Sr
String sProperty = "bytes="+nStartPos+"-"; ,|RS]I>X
httpConnection.setRequestProperty("RANGE",sProperty); )y8 u+5^
Utility.log(sProperty); 8)n799<.
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InputStream input = httpConnection.getInputStream(); o1I8l7
//logResponseHead(httpConnection); YMGzO
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byte[] b = new byte[1024]; aH@GhI^@
int nRead; :mOHR&2xR%
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) G .PzpBA
{ 9em?2'ysa
nStartPos += fileAccessI.write(b,0,nRead); y"5>O|`
//if(nThreadID == 1) c*iZ6j"iI
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); w, uyN
} .7lDJ2
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Utility.log("Thread " + nThreadID + " is over!"); LRe2wT>I
bDownOver = true; +v$,/~$tI
//nPos = fileAccessI.write (b,0,nRead); DK-V3}`q}
} e}V3dC^pU
catch(Exception e){e.printStackTrace ();} dw6U}
} aE]/w1a
} kTJz .
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//打印回应的头信息 <~wr;"S
public void logResponseHead(HttpURLConnection con) 5!GL"
{ fyb:eO}
for(int i=1;;i++) h?UUd\RU)
{ sw:o3cC]
String header=con.getHeaderFieldKey(i); 3RSiu}
if(header!=null) PWU8 9YXp
//responseHeaders.put(header,httpConnection.getHeaderField(header)); Rn] `_[)*~
Utility.log(header+" : "+con.getHeaderField(header)); Na6z1&wS
else <K6:"
break; S(bYN[U
} Rwu
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} }V@ *
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public void splitterStop() x}acxu 2H7
{ }ZPO^4H;-
bStop = true; HfQZRDH
} /HlLfW
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} "Q{)H8,E)x
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/* }cl~Vo-mp
**FileAccess.java ~3,>TV
*//文件访问(定位,写) ED0Vlw+1
package NetFox; *OoM[wEY
import java.io.*; \U(;%V
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public class FileAccessI implements Serializable{ R8Kj3wp
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 G6l:El&
RandomAccessFile oSavedFile; *<.{sx^Gk
long nPos; +>v3&[lGv
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public FileAccessI() throws IOException ~ 9F
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{ |$hBYw
this("",0); k/U1
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} WAd5,RZ?
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public FileAccessI(String sName,long nPos) throws IOException <FaF67[Q
{ 8XS_I{}?
oSavedFile = new RandomAccessFile(sName,"rw"); HUP~
this.nPos = nPos; p,(gv])ie
oSavedFile.seek(nPos); Nft~UggK
} G=1&:nW'
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public synchronized int write(byte[] b,int nStart,int nLen) %MA o<,ha
{ 5X4 #T&.
int n = -1; >#9f{
try{ 8[PD`*w
oSavedFile.write(b,nStart,nLen); F!N D
n = nLen; CrvL[6i
} 6"OwrJB
catch(IOException e) \B72 #NR
{ iZ^tLnc
e.printStackTrace (); n5Coxvy1
} c >8IM
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return n; :NHP,"
} pm)kocG
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} =hw&2c
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/* e1Ne{zg~
**SiteInfoBean.java rAv)k&l
*/ PUU
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package NetFox; QsO%m
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public class SiteInfoBean { vO?\u`vY
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private String sSiteURL; //Site's URL 6h?v/\
private String sFilePath; //Saved File's Path )\`.Ru~,
private String sFileName; //Saved File's Name bjR:5@"
private int nSplitter; //Count of Splited Downloading File Ba8 s
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public SiteInfoBean() I`% ]1{
{//nSplitter的缺省值为5 UPE9e
//default value of nSplitter is 5 L
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this("","","",5);
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} cZb5h 9
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) &E/0jxM1
{ _nn\O3TB
sSiteURL= sURL; 0%W0vTvL
sFilePath = sPath; Q>%{Dn\?
sFileName = sName; PLV-De
this.nSplitter = nSpiltter; $2kZM4
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} q{c/TRp7
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public String getSSiteURL() crDm2oA~t
{ MEI.wJZ
return sSiteURL; ,UveH` n-
} aAi"
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public void setSSiteURL(String value) U65a_dakk
{ *"HA=-Z;
sSiteURL = value; > &V Y
} I'%\
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public String getSFilePath() o4U[;.?c
{ Z'<I
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return sFilePath; R'z
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} ,,Ia 4c
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public void setSFilePath(String value) Rf4}4ixkj
{ j@guB:0
sFilePath = value; d1{%z\u
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} ExW3LM9(
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public String getSFileName() !iHJ!
{ Z37%jdr
return sFileName; l`b%imX
} &UextG