/* F*4Qa
**SiteFileFetch.java |T$a+lHMD
*/ z<[.MH`ln
package NetFox; R!/,E
import java.io.*; 4-M6C 5#.
import java.net.*; W}R=
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public class SiteFileFetch extends Thread { 8g#
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SiteInfoBean siteInfoBean = null; //文件信息Bean |P. =
long[] nStartPos; //开始位置 n$hqNsM
long[] nEndPos; //结束位置 HV*:<2P%D
FileSplitterFetch[] fileSplitterFetch; //子线程对象 U/3e,`c
long nFileLength; //文件长度 nF. ;LM
boolean bFirst = true; //是否第一次取文件 yo?g"vbE
boolean bStop = false; //停止标志 &Qtp"#{
File tmpFile; //文件下载的临时信息 f=_Bx2ub
DataOutputStream output; //输出到文件的输出流 b#Fk>j
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) (iCZz{l@~
public SiteFileFetch(SiteInfoBean bean) throws IOException Nn,vdu{^2
{ K{=r.W
siteInfoBean = bean; [I++>4
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 7dufY
} }
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); S&
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if(tmpFile.exists ()) =p,4=wo{
{ =0s`4Y"+
bFirst = false; *%Nns',
read_nPos(); <nOuyGIZ
} s=q%:uCO
else sxN>+v11z
{ c?p0#3%L#
nStartPos = new long[bean.getNSplitter()]; 1%SJ1oY
nEndPos = new long[bean.getNSplitter()]; |~/3u/
} ^^4K/XBve
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} f
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public void run() H#kAm!H
{ +Dq|l}
//获得文件长度 VGTeuu5i
//分割文件 HC9vc,Fp
//实例FileSplitterFetch M]6w^\4j9
//启动FileSplitterFetch线程 c]%;^)
//等待子线程返回 k Z+ q
try{ zH=/.31Q
if(bFirst) -+
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{ jlRl2 #"
nFileLength = getFileSize(); ,yHzo
if(nFileLength == -1) pjX%LsX\
{ u
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System.err.println("File Length is not known!"); 1kvPiV=X>
} dt-Qu},8-
else if(nFileLength == -2) 0^<Skm27"
{ ~!3t8Hx6
System.err.println("File is not access!"); [0% yJH
} NSMjr_
else @b::6n/u
{ OQytgXED
for(int i=0;i<nStartPos.length;i++) Edf=?K+\!i
{ g33<qYxP
nStartPos = (long)(i*(nFileLength/nStartPos.length)); XI%RneuDr:
} +X* F<6mZ
for(int i=0;i<nEndPos.length-1;i++) ' D)1ka.
{ K)Df}fVOc
nEndPos = nStartPos[i+1]; CU#L *kz
} eHVdZ'%x
nEndPos[nEndPos.length-1] = nFileLength; r!=]Q}`F
} ;1{iF2jZ:
} dl*_ m3T
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//启动子线程 hV3,^#9o
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 'WKu0Yi^'
for(int i=0;i<nStartPos.length;i++) WX%h4)z*
{ mC*W2#1pF
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), S F&M
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), p<of<YU)
nStartPos,nEndPos,i); ]Wy^VcqX
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [ -9)T
fileSplitterFetch.start(); V9 +xL 1U#
} =Q/w% 8G
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), W; 3
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 1?D8|<
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", "jl1.Ah
nEndPos = " + nFileLength); {&\J)oZ
// fileSplitterFetch[nPos.length-1].start(); @K,2mhE~h
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//等待子线程结束 im_w+h%^
//int count = 0; ' +)6#/*
//是否结束while循环 +?URVp
boolean breakWhile = false; 9l]UE0yTL/
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while(!bStop) ]yyU)V0Iu
{ c0!Te'?
write_nPos(); ?Ia4H
Utility.sleep(500); Ux_EpC
breakWhile = true; gZw\*9Q9
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for(int i=0;i<nStartPos.length;i++) U-Af7qO
{ #t"9TP
if(!fileSplitterFetch.bDownOver) vqrBRlZ
{ M*g2VyZ
breakWhile = false; $x;tSJ)m~
break; i:l80 GK
} httls>:xB|
} y-E1]4?})
if(breakWhile) z7'n, [
break; ]sX7%3P
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pd=7^"[};
//count++; N; rXl8
//if(count>4) b*lKT]D,
// siteStop(); S9OxI$6Y
} N+*(Y5TU
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System.err.println("文件下载结束!"); U3mXm?f
} ::4"wU3t
catch(Exception e){e.printStackTrace ();} K&j'c
} z`\#$
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//获得文件长度 mcvDxjk,h
public long getFileSize() "F&Tnhh4
{ LTg?5GwD\j
int nFileLength = -1; l9]o\JFXk
try{
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URL url = new URL(siteInfoBean.getSSiteURL()); Rb{+Ki
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /DLr(
httpConnection.setRequestProperty("User-Agent","NetFox"); 4qqF v?O[r
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int responseCode=httpConnection.getResponseCode(); 2;&mkcK'
if(responseCode>=400) ?+3R^%`V
{ \U==f&G?J
processErrorCode(responseCode); =ft9T&ciD
return -2; //-2 represent access is error 0v;ve
} R|/Wz/$1A
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String sHeader; jIKBgsiF/
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for(int i=1;;i++) Jm?l59bv
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{ Sq?,C&LsA
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); w(aUEWYL
//Utility.log(in.readLine()); 4DvdEt
sHeader=httpConnection.getHeaderFieldKey(i); ERk kSTp
if(sHeader!=null) |d5ggf.w
{ 1Pu
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if(sHeader.equals("Content-Length")) A3xbT\xdg
{ $Xf~# uH
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); h!QjpzQe
break; 3)dP7rmZ
} HS7R lU^
} Xe)Pg)J1
else Xz8$Xz,O
break; L%f-L.9`u
} "pYe-_"@
} $$42pb.
catch(IOException e){e.printStackTrace ();} yj>){NcX
catch(Exception e){e.printStackTrace ();} *8/VSs
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Utility.log(nFileLength); ohtT
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return nFileLength; !TGr .R
} vnDmFqelz
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//保存下载信息(文件指针位置) " l.!Ed
private void write_nPos() c$/<l5Uw
{ {JTmP `&l
try{ >)4.$#H
output = new DataOutputStream(new FileOutputStream(tmpFile)); Il|GCj*N
output.writeInt(nStartPos.length); ^[0"vtb
for(int i=0;i<nStartPos.length;i++) 8*vFdoE_oO
{ STw oYn
// output.writeLong(nPos); bea|?lK
output.writeLong(fileSplitterFetch.nStartPos); t~q?lT
output.writeLong(fileSplitterFetch.nEndPos); f KHse$?_
}
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output.close(); I`3d;l;d
} _n7%df
catch(IOException e){e.printStackTrace ();} h:_NA
catch(Exception e){e.printStackTrace ();} ~bWhth2*
} JXL'\De ;
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//读取保存的下载信息(文件指针位置) TFYw
private void read_nPos() t]4!{~,
{ S3QaYq"v
try{ 1}`2\3,
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Y!F!@`%G
int nCount = input.readInt(); 'bl%Y).9w
nStartPos = new long[nCount]; hc"6u\>
nEndPos = new long[nCount]; <M=';h^w2
for(int i=0;i<nStartPos.length;i++) f
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{ `6UtxJSx
nStartPos = input.readLong(); W5|j1He&
nEndPos = input.readLong();
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} +eC3?B8rN
input.close(); .3( ;9};
} _Cj(fFL
catch(IOException e){e.printStackTrace ();} % oR>Uo
catch(Exception e){e.printStackTrace ();} M= atls
} URLk9PI
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private void processErrorCode(int nErrorCode) ERp{gB2U?
{ w?*jdwh,'
System.err.println("Error Code : " + nErrorCode); %TDXF_.[
} CGkI\E
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//停止文件下载 u|T%Xy=LU
public void siteStop() Fk aXA.JE
{ UUGe"]V^g:
bStop = true; YlrB@mE0n$
for(int i=0;i<nStartPos.length;i++) ]r!QmWw~V
fileSplitterFetch.splitterStop(); /-><k,mL?
q P'[&h5Y
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} MJA~jjy4
} z$66\/V']
//负责部分文件的抓取 =D}4X1l
**FileSplitterFetch.java
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*/ d[S#Duz<&
package NetFox; %Sul4: D#
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import java.io.*; vkuc8 li
import java.net.*; v[smQO
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public class FileSplitterFetch extends Thread { V!W1fb7V
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String sURL; //File URL yZ5x88 >
long nStartPos; //File Snippet Start Position }f]b't
long nEndPos; //File Snippet End Position M}u1qXa
int nThreadID; //Thread's ID oE6|Zw
boolean bDownOver = false; //Downing is over Fav^^vf*1
boolean bStop = false; //Stop identical -w\M-wc/$
FileAccessI fileAccessI = null; //File Access interface ljuNs@q
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException e$32
{ GyuV
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this.sURL = sURL; =&N$Vqn
this.nStartPos = nStart; -<PC"B
this.nEndPos = nEnd; Vha'e3o!
nThreadID = id; 4T%cTH:.9N
fileAccessI = new FileAccessI(sName,nStartPos);//定位 3(C :X1
} (![t_r0
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public void run() >(OYK}ZN
{ \q,s?`+B
while(nStartPos < nEndPos && !bStop) @0D![oA
{ TW2Z=ks=
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try{ VyY.r#@
URL url = new URL(sURL); +YuzpuxjJ
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Q-(Dk?z{
httpConnection.setRequestProperty("User-Agent","NetFox"); DFc [z"[
String sProperty = "bytes="+nStartPos+"-"; F3Dt7q
httpConnection.setRequestProperty("RANGE",sProperty); ol<lCp
Utility.log(sProperty); ~$Y|ca
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InputStream input = httpConnection.getInputStream(); i5VG2S
//logResponseHead(httpConnection); 06jMj26!
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byte[] b = new byte[1024]; V~[:*WOX
int nRead; kZv*rWAm
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 9ad6uTc
{ C.(
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nStartPos += fileAccessI.write(b,0,nRead); f1J%]g!
//if(nThreadID == 1) r6MB"4xd
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); V_f`0\[x
} =hGJAU
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Utility.log("Thread " + nThreadID + " is over!"); drIK(u\_
bDownOver = true; l2s{~ IC
//nPos = fileAccessI.write (b,0,nRead); pC^2Rzf
} 'W(xgOP1
catch(Exception e){e.printStackTrace ();} (AuPZ
} hbfsHT
} ;_N"Fdl
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//打印回应的头信息 x6%#wsvS
public void logResponseHead(HttpURLConnection con) {xToz]YA
{ Ye@t_,)x
for(int i=1;;i++) p[-{]!
{ k}U
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String header=con.getHeaderFieldKey(i); h0lu!m#\_
if(header!=null) m8HYWzN
//responseHeaders.put(header,httpConnection.getHeaderField(header)); A9;0y jae
Utility.log(header+" : "+con.getHeaderField(header)); e#khl9j*bt
else Wcn[gn<
break; [ f34a
} ^K;hn,R=
} !oGQ8 e
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public void splitterStop() JGgxAd{L
{ B9^R8|V
bStop = true; qtY
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} \8>oJR 6
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} UJn/s;$.e
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/* VMF|iB
**FileAccess.java t%$@fjz
*//文件访问(定位,写) OpQ8\[X+
package NetFox; KuXkI;63J>
import java.io.*; H`el#tt_
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public class FileAccessI implements Serializable{ H;y}-=J+
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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 %E.S[cf%8&
RandomAccessFile oSavedFile; gt@SuX!@{^
long nPos; Q1T@oxV
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public FileAccessI() throws IOException O,irpQ
{ ?(D}5`Nfu
this("",0); 6p m~sD
} {i;6vRr
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public FileAccessI(String sName,long nPos) throws IOException $3#%aA!(#
{ FUqt)YHi
oSavedFile = new RandomAccessFile(sName,"rw"); Xm@aYNV
this.nPos = nPos; }N]!0Ka
oSavedFile.seek(nPos); g_M^E-3
} LM6]kll
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public synchronized int write(byte[] b,int nStart,int nLen) +>#e=nH
{ M5O'=\+,F
int n = -1; }"4roJ
try{ zo44^=~%
oSavedFile.write(b,nStart,nLen); hVf^
n = nLen; On%,l
} )E-E0Hl>7
catch(IOException e) YxyG\J\|,
{ Ay%:@j(E
e.printStackTrace (); wv^b_DR
} (Oq Hfv
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return n; choL%g}
} nq@5j0fK
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} 9-93aC.|}
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/* VDa|U9N
**SiteInfoBean.java T V;BNCg
*/ >a@>N
package NetFox; +?V0:Kz]
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public class SiteInfoBean { MS{{R+&
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private String sSiteURL; //Site's URL N&x:K+Zm.
private String sFilePath; //Saved File's Path v.b5iv 5
private String sFileName; //Saved File's Name 0!_*S )
private int nSplitter; //Count of Splited Downloading File )!a$#"'
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