/* "=yz}~,
**SiteFileFetch.java yZ,S$tSR
*/ jRhRw;
package NetFox; "89L^I
import java.io.*; ESni r6HoU
import java.net.*; >w#&fd
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public class SiteFileFetch extends Thread { duoM>B>8]
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SiteInfoBean siteInfoBean = null; //文件信息Bean \omfWWpK
long[] nStartPos; //开始位置 UD^=@?^7
long[] nEndPos; //结束位置 @*iT%p_L
FileSplitterFetch[] fileSplitterFetch; //子线程对象 [uFv_G{H
long nFileLength; //文件长度 'W/AYF^5
boolean bFirst = true; //是否第一次取文件 + {WZpP},v
boolean bStop = false; //停止标志 jm,:jkr
File tmpFile; //文件下载的临时信息 :b<<
DataOutputStream output; //输出到文件的输出流 0iVeM!bM
}[]1`2qD
//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) &;%,Axc
public SiteFileFetch(SiteInfoBean bean) throws IOException n\u3$nGL1`
{ ~{q;
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siteInfoBean = bean; i7\MVI8
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ;TboS-Y
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 56H~MnX
if(tmpFile.exists ()) oWBjPsQ
{ 0r]-Ltvl?}
bFirst = false; ?6 "B4%7b
read_nPos(); na3lbwq
} Ie4Xk
else bDnT><eH
{ Wo6C0Z3g}
nStartPos = new long[bean.getNSplitter()]; +HoCG;C{
nEndPos = new long[bean.getNSplitter()]; bM"d$tl$?'
} =:m6ge@C&H
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}
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public void run() _7,4C?
{ ,{BF`5bn|
//获得文件长度 CW?R7A/
//分割文件 -"}nm!j /5
//实例FileSplitterFetch 2cko
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//启动FileSplitterFetch线程 x{1S!A^
//等待子线程返回 tW%!|T5/
try{ M)CQ|P
if(bFirst) (*Q8!"D^6
{ a 9Kws[
nFileLength = getFileSize(); ~>S? m;
if(nFileLength == -1) OD).kP}s^
{ EgTj
System.err.println("File Length is not known!"); b;"Z`/h
} wa$Q8/
else if(nFileLength == -2) Sb?HRoe_
{ 'y|p)r"
System.err.println("File is not access!"); AP0z~e
} X9o6} %Y
else )u.%ycfeV
{ %+L3Xk]m'
for(int i=0;i<nStartPos.length;i++) :@^T^
{ \8/$ZEom
nStartPos = (long)(i*(nFileLength/nStartPos.length)); #f }ORA
} _o?[0E
for(int i=0;i<nEndPos.length-1;i++) j~#v*qmDU
{ h:4F?'W
nEndPos = nStartPos[i+1]; wPr!.:MF
} 5N$O
nEndPos[nEndPos.length-1] = nFileLength; 4td9=dNA+l
} Nj+gSa9
} r~PVh?
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//启动子线程 #*
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fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; )J1xO^tE
for(int i=0;i<nStartPos.length;i++) 0>U7]wZKc
{ ShJBOaE; -
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), J@o$V- KK
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), A<[BR*n
nStartPos,nEndPos,i); +%)bd
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); >44,Dp]
fileSplitterFetch.start(); 8WLBq-]G
} 3W55m@w
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), a+P^?N
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); M`,`2I A
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Pk)H(,
nEndPos = " + nFileLength); 077 wk
// fileSplitterFetch[nPos.length-1].start(); YeVkX{y
>?r8D48`
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//等待子线程结束 0[7tJbN
//int count = 0; !^qpV7./l
//是否结束while循环 lnt}l
boolean breakWhile = false; #BhcW"@
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while(!bStop) Imz1"+E~
{ C ,[q#D4
write_nPos(); sdXZsQw
Utility.sleep(500); FXFyF*w2
breakWhile = true; 1_5]3+r_U-
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for(int i=0;i<nStartPos.length;i++) q82yh&
{ H1hADn
if(!fileSplitterFetch.bDownOver) Z1R{'@Y0Z
{ aa/_:V@$~
breakWhile = false; ,W5!=\Gg(
break; z;Dc#SZnO(
} lBNB8c0e"{
} '?qI_LP?
if(breakWhile) i`7:^v;
break; UUqA^yJ
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//count++; a5uBQ?
//if(count>4) ]w~ECP(ap
// siteStop(); [}Y_O*C !
} 1NQU96
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System.err.println("文件下载结束!"); X?n($z/{
} pu
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catch(Exception e){e.printStackTrace ();} :zsMkdU
} `f\+aD'u
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//获得文件长度 dS;Ui]/J
public long getFileSize() \>c1Z5H>
{ TS@U0Ror
int nFileLength = -1; iKA qM{(
try{ FUs57
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URL url = new URL(siteInfoBean.getSSiteURL()); PQ(/1v
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); t^8|t(Lq
httpConnection.setRequestProperty("User-Agent","NetFox"); "hLmwz|a
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int responseCode=httpConnection.getResponseCode(); 0"DS>:Ntk
if(responseCode>=400) |!*abc\`(`
{ mjJ/rx{kbw
processErrorCode(responseCode); xOdLct
return -2; //-2 represent access is error -\V;Gw8mD
} Zxn>]Z_
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String sHeader; 5~=wia
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for(int i=1;;i++) R/kfbV-b
{ YbP}d&L
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); F7U$7(I2G
//Utility.log(in.readLine()); 2 D!$x+|
sHeader=httpConnection.getHeaderFieldKey(i); ky@DH(^>
if(sHeader!=null) GW!%DT
{ _QiGrC
if(sHeader.equals("Content-Length")) BaOPtBYA:
{ #An_RU6h
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Lr<?eWdCwJ
break; G[\3)@I
} !sav~dB)
} VpWpC&
else tz_WxOQ0
break; %e1`wMa
} MTeCmFe0;
} 4/E>k <MA
catch(IOException e){e.printStackTrace ();} jn#Ok@tZ
catch(Exception e){e.printStackTrace ();} A:,R.P>`C
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Utility.log(nFileLength); QS2~}{v
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return nFileLength; 6Y/TqI[
} lBfG#\rdW~
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//保存下载信息(文件指针位置) l5,}yTUta
private void write_nPos() ?Fj>7
{ [C( >e0r
try{ )*_n/^m
output = new DataOutputStream(new FileOutputStream(tmpFile)); +y|H#(wBP
output.writeInt(nStartPos.length); cK6IyJx-
for(int i=0;i<nStartPos.length;i++) 1iIag}?p
{ Q)l~?Fx
// output.writeLong(nPos); #GA6vJ4^s
output.writeLong(fileSplitterFetch.nStartPos); Ar1X
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output.writeLong(fileSplitterFetch.nEndPos); XOd
} vAo|o*
output.close(); @BS7Gyw
} h} <Ie <
catch(IOException e){e.printStackTrace ();} .DZ8kKY
catch(Exception e){e.printStackTrace ();} y2NVx!?n
} 7g&<ZZo
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//读取保存的下载信息(文件指针位置) R*z:+p}oHy
private void read_nPos() zqAp7:
{ ~Is-^k)y
try{ s+E-M=d0e
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); h,)UB1
int nCount = input.readInt(); n%}Vd
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nStartPos = new long[nCount]; _,5)
nEndPos = new long[nCount]; Q^\f,E\S
for(int i=0;i<nStartPos.length;i++) DF~{i{
{ 3hbUus
nStartPos = input.readLong(); 7P7d[KP<
nEndPos = input.readLong(); TrmU
} +hKH\]
input.close(); Y#aHGZ$i
} [wR x)F"
catch(IOException e){e.printStackTrace ();} ;mLbgiqQ J
catch(Exception e){e.printStackTrace ();} BSbi.@@tp
} sH{4 .tw
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private void processErrorCode(int nErrorCode) O^yDb
{ ?q+^U>wy&
System.err.println("Error Code : " + nErrorCode); iH[ .u{h
} ~q05xy8
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//停止文件下载 :OvTZ ?\
public void siteStop() J|GEt@o3
{ hhynB^o
bStop = true; qGPIKu
for(int i=0;i<nStartPos.length;i++) A~7q=-
fileSplitterFetch.splitterStop(); ;fnE"}
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} FfR%@
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} `L1lGlt
//负责部分文件的抓取 M<"H1>q@
**FileSplitterFetch.java 4x%R4tk
*/ pswEIa
package NetFox; 4+j:]poYG{
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import java.io.*; #>/stU-
import java.net.*; fPLi8`r
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public class FileSplitterFetch extends Thread { rAZsVnk?
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String sURL; //File URL @+`">a8},
long nStartPos; //File Snippet Start Position 4RXF.kJ3=
long nEndPos; //File Snippet End Position 5? rR'0
int nThreadID; //Thread's ID wX!>&Gc.
boolean bDownOver = false; //Downing is over V0!.>sX9
boolean bStop = false; //Stop identical A(<"oAe|
FileAccessI fileAccessI = null; //File Access interface o}4J|@Hi|4
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Sd0y=!Pj=
{ v%6mH6V
this.sURL = sURL; ahJu+y
this.nStartPos = nStart; !W ,pjW%Y
this.nEndPos = nEnd; |zaYIVE[
nThreadID = id; M~/R1\'&j
fileAccessI = new FileAccessI(sName,nStartPos);//定位 ,\cO>y@
} `aw5"ns^V
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public void run() iB=v
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{ a6v ls]?
while(nStartPos < nEndPos && !bStop) uNcE_<
{ lh?TEQ
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try{ DKGZm<G>
URL url = new URL(sURL); B1C"F-2d
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); c[xH:$G?Y
httpConnection.setRequestProperty("User-Agent","NetFox"); 9 yE
String sProperty = "bytes="+nStartPos+"-"; #*|0WaC
httpConnection.setRequestProperty("RANGE",sProperty); kj4t![o+
Utility.log(sProperty); @aC2]
Z}
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InputStream input = httpConnection.getInputStream(); X+*"FKm S.
//logResponseHead(httpConnection); ]1XJQW@gF
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byte[] b = new byte[1024]; <hO|:LX
int nRead; du:%{4
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) #
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{ )Z2l*fV
nStartPos += fileAccessI.write(b,0,nRead); ?l3PDorR
//if(nThreadID == 1) #<\A[Po
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); O\(0{qu
} VZ:LK
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pd[?TyVK;
Utility.log("Thread " + nThreadID + " is over!"); ;U^7]JO;
bDownOver = true;
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//nPos = fileAccessI.write (b,0,nRead); A{!D7kwTz~
} XA$Z7_gu3
catch(Exception e){e.printStackTrace ();} <~[A
} (RL5L=,u
} -I'@4\<
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//打印回应的头信息 /kAu&}
public void logResponseHead(HttpURLConnection con) pV3o\bk!
{ zdwr5k
for(int i=1;;i++) M]+FTz
{ %Q}T9%Mtj
String header=con.getHeaderFieldKey(i); k_2W*2'S
if(header!=null) Dt9[uyP&
//responseHeaders.put(header,httpConnection.getHeaderField(header)); azj:Hru&t#
Utility.log(header+" : "+con.getHeaderField(header)); jH1!'1s|
else c&+p{hH+
break; X\I"%6$
} drJ<&1O
} <V}^c/c!
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public void splitterStop() oM=Ltxv}
{ +=5Dt7/|
bStop = true; k0=$mmmPY
} \&&jzU2
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} tr]=q9
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/* QT;mCD=OD
**FileAccess.java /A U&
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*//文件访问(定位,写) $6ZO
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package NetFox; 6S;-fj
import java.io.*; hJ+;N
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public class FileAccessI implements Serializable{ ^<0azza/(
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 {%S>!RA
RandomAccessFile oSavedFile; "g)@jqq:>
long nPos; 2BU%4IG
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public FileAccessI() throws IOException o;+J3\
{ MLL4nkO,`
this("",0); A=7
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} %|l^oC+E
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public FileAccessI(String sName,long nPos) throws IOException MY zyg
{ N5ityJIgQ
oSavedFile = new RandomAccessFile(sName,"rw"); ,cR=W|6cQm
this.nPos = nPos; 4uW}.7R'
oSavedFile.seek(nPos); H0Q.; !^
} Rw$>()}H8
A9_)}
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public synchronized int write(byte[] b,int nStart,int nLen) SBnwlM"AN
{ P"`OuN
int n = -1; `ySmzp
try{ "y_A xOH
oSavedFile.write(b,nStart,nLen); o2cZ
n = nLen; `%lgT+~T
} ~.;S>o[
catch(IOException e) L:HJ:
{ r-#23iT.~
e.printStackTrace (); f)xHSF"
} ORPQ1%tu
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return n; }MKm>N
} %Lec\(-4L
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} %4:tRF
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/* \de824
**SiteInfoBean.java JzA`*X[
*/ xm@vx}O:
package NetFox; fL9R{=I%
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public class SiteInfoBean { J1I"H<}-6
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private String sSiteURL; //Site's URL Ol4)*/oZ
private String sFilePath; //Saved File's Path >;S/$
private String sFileName; //Saved File's Name zbt>5S_
private int nSplitter; //Count of Splited Downloading File n>F1G
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public SiteInfoBean() ;m{*iKL6{
{//nSplitter的缺省值为5 yM%,*VZ
//default value of nSplitter is 5 F&}>2QiL
this("","","",5); uJ<sa;
} YKwej@9,
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) r40#-A$
{ \S(:O8_"68
sSiteURL= sURL; HFD5*Z~M
sFilePath = sPath; k>
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sFileName = sName; ' bio:1
this.nSplitter = nSpiltter; \ /C-e
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} KDP7u
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public String getSSiteURL() pEIc?i*
{ >jjuWO3T
return sSiteURL; @DYx xM-
} @&;y0N1xo
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public void setSSiteURL(String value) "(/
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{ [m7jZOEu
sSiteURL = value; RG=!,#X
} W/U&w.$
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public String getSFilePath() T$/6qZew
{ ~ g$Pb[V
return sFilePath; O@jW&-;
} -[?q?w!?
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public void setSFilePath(String value) $FEG0&
{ U@v=q9'W
sFilePath = value; y?W8FL
} d_BO&k