/* ]fZ<`w8u}
**SiteFileFetch.java a5|@R<iF
*/ w!\3ICB
package NetFox; TXjloGv^
import java.io.*; 'TL2%T/)t
import java.net.*; JBz}|MD
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public class SiteFileFetch extends Thread { v9=}S\=Cd
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SiteInfoBean siteInfoBean = null; //文件信息Bean } ~| k
long[] nStartPos; //开始位置 ^-hEr sK
long[] nEndPos; //结束位置
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FileSplitterFetch[] fileSplitterFetch; //子线程对象 6gnbkpYi
long nFileLength; //文件长度 &f-hG3/M
boolean bFirst = true; //是否第一次取文件 Z0-ytODII
boolean bStop = false; //停止标志 &R,9+c
File tmpFile; //文件下载的临时信息 >)NQH9'1
DataOutputStream output; //输出到文件的输出流 eX"''PA
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 3+ =I;nj
public SiteFileFetch(SiteInfoBean bean) throws IOException /;Yy@oc
{ b0rX QMu
siteInfoBean = bean; =LI:S|[4
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); |f\D>Y%)
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); eZH~je{1
if(tmpFile.exists ()) <J&7]6Z
{ D^+?|Y@N
bFirst = false; a[sKE?
read_nPos(); hd2'AlB
} yzR=A%V8A
else id ?"PD"%
{ yS!(Ap
nStartPos = new long[bean.getNSplitter()]; 8O7Yv<
nEndPos = new long[bean.getNSplitter()]; oZN'HT
} _7"5wB?|+
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} O- #TZ
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public void run() ?qmp_2:WU
{ _'!kuE,*1
//获得文件长度 :U'Cor
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//分割文件 e)@3m.
//实例FileSplitterFetch X:EEPGE
//启动FileSplitterFetch线程 7C7>y/uS
//等待子线程返回 Q9c)k{QZ
try{ #H~_K}Ks
if(bFirst) O,s. D,S
{ P|xG\3@Z
nFileLength = getFileSize(); F PR`tE
if(nFileLength == -1) UV AJxqz%}
{ /[=E0_t+
System.err.println("File Length is not known!"); BI/&dKM
} I4=Xb^Ux
else if(nFileLength == -2) @0NJ{
{
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System.err.println("File is not access!"); oehaQ#e
} 1/;o
else Y3Oz'%B
{ D#Kuo$
for(int i=0;i<nStartPos.length;i++) fThgK;Qy'U
{ n?xTkkr0
nStartPos = (long)(i*(nFileLength/nStartPos.length)); p?# pT}1
} nlc.u}#
for(int i=0;i<nEndPos.length-1;i++) },@``&e
{ 5M F#&v
nEndPos = nStartPos[i+1]; 94/BG0
} )8,|-o=
nEndPos[nEndPos.length-1] = nFileLength; eSfnB_@x2
} Y@uh[aS!
} 4w93}t.z
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//启动子线程 h4)Bs\==mT
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 7TX2&kMoc
for(int i=0;i<nStartPos.length;i++) xZ .!d.rn
{ Bp?
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &7>zURv
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), w7TJv4_
nStartPos,nEndPos,i); $B (kZ
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 33Az$GXFsq
fileSplitterFetch.start(); 2C=Q8ayvX
} 7DD&~ZcD
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #7G*GbKY
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); J G$Z.s
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", G~,:2
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nEndPos = " + nFileLength); WsGths+[
// fileSplitterFetch[nPos.length-1].start(); lioc`C:
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//等待子线程结束 E4z)Mr#
//int count = 0; (?0`d
//是否结束while循环 bHE2,;o
boolean breakWhile = false; r!
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while(!bStop) kz}R[7
{ @N@F,~[RR2
write_nPos(); 3gEMRy*+
Utility.sleep(500); HD>q(cK_|8
breakWhile = true; bulS&dAX
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for(int i=0;i<nStartPos.length;i++) `G9 l
{ 5GzFoy)j>
if(!fileSplitterFetch.bDownOver) TrS8h^C
{ LeOP;#
breakWhile = false; (Z]HX@"{J
break; Kn`M4O
} <AH1i@4
} sgUud_r)4
if(breakWhile) *ISZlR\#
break; !]yO^Ob.E
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//count++; mHc>"^R
//if(count>4) FS6`6M.K
// siteStop(); dt@P>rel
} 2Os1C}m
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System.err.println("文件下载结束!"); O^Q7b7}y
} ~^jq(:d)
catch(Exception e){e.printStackTrace ();} CNZ z]H
} `l;n:]+
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//获得文件长度 @gC=$A#
public long getFileSize() l e4?jQQ@L
{ +ZMls
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int nFileLength = -1; @mP]*$00
try{ t_^X$pL
URL url = new URL(siteInfoBean.getSSiteURL()); Fb22p6r
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )SF}2?7e
httpConnection.setRequestProperty("User-Agent","NetFox"); `{k"8#4:qA
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int responseCode=httpConnection.getResponseCode(); 2Y\
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if(responseCode>=400) {9Y+.46S
{ D"(L5jR8m@
processErrorCode(responseCode); g[RI.&?
return -2; //-2 represent access is error 4fk8*{Y
} y;wx?1)
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String sHeader; Q1d'~e
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for(int i=1;;i++) Un`^jw#_
{ J%09^5:-z
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 4;n6I)&.(
//Utility.log(in.readLine()); ,YTIC8qKr
sHeader=httpConnection.getHeaderFieldKey(i); U$]|~41#
if(sHeader!=null) vE@!{*
{ ~(!XY/0e
if(sHeader.equals("Content-Length")) &,A64y
{ ?Nf>]|K:Q
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); gVQjL+_W
break; Nkxmm/Z
} 0"2=n.##
} m(RXJORI
else Y}#h5\
break; \%PaceH
} 1XM^8 .;
} ku$$ 1xq
catch(IOException e){e.printStackTrace ();} S}APQ
catch(Exception e){e.printStackTrace ();} JD@J[YY5R
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Utility.log(nFileLength); eP*lI<NQ1
{ eCC$&"
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return nFileLength;
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} /VmR<C?h
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//保存下载信息(文件指针位置) m_?d=o
private void write_nPos() MZ Aij
{ R|O8RlH
try{ HGm 3+,
output = new DataOutputStream(new FileOutputStream(tmpFile)); 6qcO?U
output.writeInt(nStartPos.length); 9Gv[8'I
for(int i=0;i<nStartPos.length;i++) 'YNT8w/3
{ =]:> "_jN
// output.writeLong(nPos); GKN%Tv:D_
output.writeLong(fileSplitterFetch.nStartPos); !vG'J\*xc
output.writeLong(fileSplitterFetch.nEndPos); WVVJ
} 'cY` w
output.close(); Y3Vlp/"rB"
} $)3%U?AP
catch(IOException e){e.printStackTrace ();} #fT*]NN
catch(Exception e){e.printStackTrace ();} m[j70jYe
} LPMU8Er
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//读取保存的下载信息(文件指针位置) x| yEtO&
private void read_nPos() vAyFm dJ^
{ m(pE5B(
try{ 7S?4XyU/o
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); LpR3BP@At
int nCount = input.readInt(); `rf_7
nStartPos = new long[nCount]; w)Covz'uf
nEndPos = new long[nCount]; @V03a
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for(int i=0;i<nStartPos.length;i++) E b=}FuV
{ XC.%za8
nStartPos = input.readLong(); @|Rrf*J?%
nEndPos = input.readLong(); \Y"Wu
} 2WU@*%sk"
input.close(); /yM:|`tT
} m1Y>Nj[f
catch(IOException e){e.printStackTrace ();} a4irokJv#
catch(Exception e){e.printStackTrace ();} 4:U?u
} BJ% eZ.
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private void processErrorCode(int nErrorCode) X7s
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{ ^tXJj:wtS
System.err.println("Error Code : " + nErrorCode); zbq@pj)Qu
} 6R=W}q4
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//停止文件下载 D1__n6g[
public void siteStop() N^3N[lD{
{ Fd0%lnui
bStop = true; !?|Th5e
for(int i=0;i<nStartPos.length;i++) CiB%B`,N
fileSplitterFetch.splitterStop(); 9W(dmde>
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}
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} s8}@=]aA
//负责部分文件的抓取 \hB5@e4i2
**FileSplitterFetch.java uDEvzk42
*/ V7/I>^X
package NetFox; Q[nEsYP
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import java.io.*; fMOU$0]$<
import java.net.*;
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public class FileSplitterFetch extends Thread { j$+nKc$
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String sURL; //File URL 5H ue7'LS
long nStartPos; //File Snippet Start Position 8 XU1/i7N
long nEndPos; //File Snippet End Position >Q(3*d >
int nThreadID; //Thread's ID 3+XOZh8
boolean bDownOver = false; //Downing is over 3`k;a1Z#O'
boolean bStop = false; //Stop identical Zl*X?5u
FileAccessI fileAccessI = null; //File Access interface KQ~i<1&j
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException SLh(9%S;
{ Dc_yM
this.sURL = sURL; @;'o2
this.nStartPos = nStart; C+TI]{t
this.nEndPos = nEnd; qzTuxo0B
nThreadID = id; )a-Du$kd
fileAccessI = new FileAccessI(sName,nStartPos);//定位 d+'p@!W_
} ariLG [:X
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public void run() +(h\fm7*-
{ rYbpih=x
while(nStartPos < nEndPos && !bStop) ({q?d[q[
{ RO.k]x6
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try{ uXKERzg
URL url = new URL(sURL); Ry'= ke
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _A=$oVe
httpConnection.setRequestProperty("User-Agent","NetFox"); 1&-
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String sProperty = "bytes="+nStartPos+"-"; )'~6HO8Z
httpConnection.setRequestProperty("RANGE",sProperty); ={z*akn,
Utility.log(sProperty); $g
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InputStream input = httpConnection.getInputStream(); ?#45wC
//logResponseHead(httpConnection); 7Zh~lM
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byte[] b = new byte[1024]; e:5bzk!~
int nRead; xftBSdVE
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) c`o7d)_Ke
{ }b-g*dn]5
nStartPos += fileAccessI.write(b,0,nRead); ~x|F)~:0=
//if(nThreadID == 1) uH(f$A
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /C6k+0ApMT
} N|6MP
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Utility.log("Thread " + nThreadID + " is over!"); RS^lKJ1 U
bDownOver = true; L>3x9
//nPos = fileAccessI.write (b,0,nRead); eN^qG
42
} 43@{JK9G
catch(Exception e){e.printStackTrace ();} /\hzb/
} HbxL:~:}J
} |g//g\dd
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//打印回应的头信息 sPR1?:0:
public void logResponseHead(HttpURLConnection con) MP>dW nl
{ v~^{{O
for(int i=1;;i++) $GTU$4u
{ fe9LEM8j
String header=con.getHeaderFieldKey(i); [Ki0b^
if(header!=null) zlEX+=3
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ]VD|xm:kj
Utility.log(header+" : "+con.getHeaderField(header)); QC9eUYe
else #n#@fAY
break; K[!&b0O
} IkGfnXJ
} *exS6@N]
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public void splitterStop() !K'}K>iT
{ TL}++e
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bStop = true; %y@Hh=
} K5xX)oV
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} njWL U!
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/* ;N0~;I
**FileAccess.java n:{qC{D-qS
*//文件访问(定位,写) uA#P'?
package NetFox; ;{U@qQD7
import java.io.*; n6BQk2l
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public class FileAccessI implements Serializable{ tF{D= ;G
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 a- |*?{o
RandomAccessFile oSavedFile; 4X+ifZO
long nPos; e,Uo#T6J
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public FileAccessI() throws IOException v5QqS8u_C
{ LC'{p
this("",0); +PcmJ
} c+hQSm|bf)
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public FileAccessI(String sName,long nPos) throws IOException t+1 %RyKFB
{ TjwBv6h
oSavedFile = new RandomAccessFile(sName,"rw"); ^$'z!+QRM
this.nPos = nPos; p IU&^yX>
oSavedFile.seek(nPos); .ZJRO>S
} +h r@#n4A
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public synchronized int write(byte[] b,int nStart,int nLen) )~HUo9K9
{ +i@y@<l:+
int n = -1; !U'QqnT
try{ L_wk~z
oSavedFile.write(b,nStart,nLen); nh!a)]c[
n = nLen; '8{Ne!y
} -\
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catch(IOException e) DUC#NZgw
{ !>zo_fP
e.printStackTrace (); 4'!c*@Y
} ?C&z]f3(:
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return n; 8>WC5%f*
} dAkgR~
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} =Q+=
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/* Ns7(j-
**SiteInfoBean.java xx{PespNt
*/ o'f?YZ$.
package NetFox; t ]_VG
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public class SiteInfoBean { p%*%n3bw
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private String sSiteURL; //Site's URL I~Zh@d%
private String sFilePath; //Saved File's Path w6{TE(]zp
private String sFileName; //Saved File's Name P#XID 2;
private int nSplitter; //Count of Splited Downloading File O]1y0BOQ
* Of4o
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public SiteInfoBean() Nz],IG.
{//nSplitter的缺省值为5 RWgNo#<
//default value of nSplitter is 5 JQ6zVS2SSS
this("","","",5); oIb|*gX^
} Vc2A
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) o8-^cP1
{ LS88.w\=S@
sSiteURL= sURL; Zy(W^~NT
sFilePath = sPath; 8$;=Uf,x
sFileName = sName; ]2\VweV
this.nSplitter = nSpiltter; ] 0B2#
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} g#t[LI9(F[
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public String getSSiteURL()
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{ |qmu_x\
return sSiteURL; gm[z[~X@
} {yB&xj[z
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public void setSSiteURL(String value) HLZ;8/|48m
{ U~j
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sSiteURL = value; ZsOIH<