/* @Y8/#6KE
**SiteFileFetch.java w\PCBY=
*/ XnCrxj
package NetFox; Js("H
import java.io.*; ;?`l1:C5)
import java.net.*; ?5yj</W
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public class SiteFileFetch extends Thread { rDvz2p"R
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SiteInfoBean siteInfoBean = null; //文件信息Bean {#Vck\&
long[] nStartPos; //开始位置 2*<'=*zaQ
long[] nEndPos; //结束位置 5/{";k)L+
FileSplitterFetch[] fileSplitterFetch; //子线程对象 3jG
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long nFileLength; //文件长度 yk<$XNc
boolean bFirst = true; //是否第一次取文件 PiTe/
boolean bStop = false; //停止标志 _o-lNt+
File tmpFile; //文件下载的临时信息 :a#pzEK
DataOutputStream output; //输出到文件的输出流 u|'}a3
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) J|D$
public SiteFileFetch(SiteInfoBean bean) throws IOException ZKT~\l
{ yavoGk
siteInfoBean = bean; V7qc9Gd@I
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 3-T}8VsiP
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Es~|:$(N]|
if(tmpFile.exists ()) `T \"B%
{ 1; "t8.*%e
bFirst = false; +#|):aF
read_nPos(); )f6:{ma
} <m|\#Jw_V
else W18I"lHeh
{ ,& ^vc_}
nStartPos = new long[bean.getNSplitter()]; xO<$xx
nEndPos = new long[bean.getNSplitter()]; (3;dtp>Xx
} .}V&*-ep
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} nHB=*Mj DV
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public void run() .M$}.v
{ @^)aUOe
//获得文件长度 xa?#wY
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//分割文件 jD
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//实例FileSplitterFetch ERE1XOe=D
//启动FileSplitterFetch线程 [v!TQwMU
//等待子线程返回 u
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try{ Rt{`v<
if(bFirst) W?B(Jsv
{ BIr24N
nFileLength = getFileSize(); K[XFJ 9
if(nFileLength == -1) =`l).GnN2`
{ {_]'EK/w
System.err.println("File Length is not known!"); 5"]t{-PD
} >,JA=s
else if(nFileLength == -2) kZ0|wML8
{ bxS+ R\
System.err.println("File is not access!"); D3>;X= 1
} j+_pF<$f:
else 4&+;n[ D
{ B: pIzCP
for(int i=0;i<nStartPos.length;i++) (xJZeY)-b^
{ L,XWX8
nStartPos = (long)(i*(nFileLength/nStartPos.length)); jb~/>I^1
} H$/r{gfg^
for(int i=0;i<nEndPos.length-1;i++) h]#wwJF
{ 7fOk]Yl[
nEndPos = nStartPos[i+1]; tv+H4/
} N~%F/`Z<+
nEndPos[nEndPos.length-1] = nFileLength; <Y(lRM{
} V|h/a\P
} z>f>B6
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//启动子线程 Wy'H4Rg8
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; a^*@j:[
for(int i=0;i<nStartPos.length;i++) (v\Cv)OS
{ B`/cKfg
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), a09]5>*
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), p$5+^x'(
nStartPos,nEndPos,i); c
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Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); K`9ph"(Z
fileSplitterFetch.start(); NTHy!y<!h
} Use`E
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !*?Ss
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); +U%U3tAvs
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", H@uCbT
nEndPos = " + nFileLength); u,d@oF(=
// fileSplitterFetch[nPos.length-1].start();
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//等待子线程结束 Ng6(2Wt0e
//int count = 0; \?bp^BrI
//是否结束while循环 (]Z$mv!
boolean breakWhile = false; [S}o[v\
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while(!bStop) %#.HFK
{ !~{AF|2f
write_nPos(); .Jt&6N
Utility.sleep(500); =Of!1TR(
breakWhile = true; *N0R3da
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for(int i=0;i<nStartPos.length;i++) Lmy ^/P%
{ ugM,wT&~Y
if(!fileSplitterFetch.bDownOver) dz',!|>
{ WH.5vrY Z
breakWhile = false; M~/%V NX
break; 0Wf,SYx`s
} }Om+,!_d
} TB]Bl.
if(breakWhile) r$~w3yN)v
break; oJF@O:A
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//count++; 4MVa[0Y
//if(count>4) `hD\u@5Tw
// siteStop(); 2VOdI
} (9N75uCa
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}ug|&25D
System.err.println("文件下载结束!"); .TN9N
} hi>sDU<x
catch(Exception e){e.printStackTrace ();} <}c`jN!z.
} <y(uu(c
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//获得文件长度 silTL_$
public long getFileSize() xGQ958@
{ MorR&K
int nFileLength = -1; D?u*^?a2
try{ .)W'{2J-
URL url = new URL(siteInfoBean.getSSiteURL()); SC~cryb
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _MZqH8
httpConnection.setRequestProperty("User-Agent","NetFox"); Xj;nh?\u
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int responseCode=httpConnection.getResponseCode(); z G
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if(responseCode>=400) llbj-9OZL
{ 93|u.
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processErrorCode(responseCode); ; 4E0%@R
return -2; //-2 represent access is error q%=`PCty
} 3A_7R-sQ
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String sHeader; )#9R()n!
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for(int i=1;;i++) A*BIudli
{ I=VPw5"E
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); JJ3(0
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//Utility.log(in.readLine()); (m[]A&u
sHeader=httpConnection.getHeaderFieldKey(i); &L,zh{Mp
if(sHeader!=null) goi5I(yn^
{ ,TTt<&c
if(sHeader.equals("Content-Length")) r>:7)p!|
{ 8|A*N<h
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); O2E6F^.pYw
break; 8CxC`*L(
} C7`FM@z
} 1(`>9t02/?
else U:eahK
break; ?d1H]f<M
} T?W`g>yM
} 3tMFJ ;*`
catch(IOException e){e.printStackTrace ();} @x">e][B
catch(Exception e){e.printStackTrace ();} KaC+x-%K
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Utility.log(nFileLength); V.kUFTCvf
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return nFileLength; :]Jwcp
} #$xiqL
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//保存下载信息(文件指针位置) &ZgB b
private void write_nPos() 2{zFO3i<3
{ |q5R5mQ
try{ :Vc+/ZyW
output = new DataOutputStream(new FileOutputStream(tmpFile)); &[}T41
output.writeInt(nStartPos.length); n83,MV?-
for(int i=0;i<nStartPos.length;i++) }E+}\&
{ >ZKE
// output.writeLong(nPos); yz!j9pJ
output.writeLong(fileSplitterFetch.nStartPos); IiV:bHUE}0
output.writeLong(fileSplitterFetch.nEndPos); p%_#"dkC7
} s5>=!yX
output.close(); -.:[a3c?
} ;"=a-$vm
catch(IOException e){e.printStackTrace ();} ,Y
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catch(Exception e){e.printStackTrace ();} +2=N#LM
} a!}.l< )
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//读取保存的下载信息(文件指针位置) zFh
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private void read_nPos() lL~T@+J~
{ 0t<]Uf
try{ +]/_gz
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 5An|#^]
int nCount = input.readInt(); MzRURH,
nStartPos = new long[nCount]; @2-Eky
nEndPos = new long[nCount]; PZ~uHX_d>
for(int i=0;i<nStartPos.length;i++) *Z=K9y,IC
{ 4flyV -
nStartPos = input.readLong();
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nEndPos = input.readLong(); 3!^5a%u
} x|G#oG)_
input.close(); |l(rR06#.]
} s8.O L_e
catch(IOException e){e.printStackTrace ();} LbDhPG`u
catch(Exception e){e.printStackTrace ();} @a)
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} pPm[<^\# S
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private void processErrorCode(int nErrorCode) L)JpMf0
{ .w^M?}dx
System.err.println("Error Code : " + nErrorCode); /u{ 9UR[g
} L3P _
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//停止文件下载
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public void siteStop() P&C,E E$
{ E^ _P
bStop = true; x]lv:m\)jT
for(int i=0;i<nStartPos.length;i++) w1EYXe
fileSplitterFetch.splitterStop(); =1fO"|L
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} ,/{mRw%
} a?K=
//负责部分文件的抓取 )s(J8J[b*L
**FileSplitterFetch.java )Ac+5bs
*/ vr2tIKvpn
package NetFox; 6,)!\1k
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import java.io.*; rxjMCMF
import java.net.*; Mh>H5l.1i
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public class FileSplitterFetch extends Thread { _|rrl
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String sURL; //File URL \k_0wt2x1
long nStartPos; //File Snippet Start Position *;. l/
long nEndPos; //File Snippet End Position #\*ODMk$4|
int nThreadID; //Thread's ID qlmz@kTb
boolean bDownOver = false; //Downing is over
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boolean bStop = false; //Stop identical T;X8T
FileAccessI fileAccessI = null; //File Access interface 48Y5ppcS
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException \](IBI:
{ ao>bnRXR
this.sURL = sURL; B5pMcw
this.nStartPos = nStart; F@4XORO;
this.nEndPos = nEnd; ?#ue:O1
nThreadID = id; {C Qo}@.7
fileAccessI = new FileAccessI(sName,nStartPos);//定位 He="S3XON
} '$*d:1
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public void run() [4sI<aH
{ J
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while(nStartPos < nEndPos && !bStop) ,A9pj k'
{ 3Vj uk7
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#=UEx
try{ -~ytk=
URL url = new URL(sURL); Y%:FawR
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <T{2a\i 4f
httpConnection.setRequestProperty("User-Agent","NetFox"); )nU%}Z
String sProperty = "bytes="+nStartPos+"-";
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httpConnection.setRequestProperty("RANGE",sProperty); bs$x%CR
Utility.log(sProperty); jC>l<d_
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InputStream input = httpConnection.getInputStream(); De,4r(5
//logResponseHead(httpConnection); @=q,,t$r
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byte[] b = new byte[1024]; Hi #'h
int nRead; 2GQq(_
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) VQF!|*#
{ B4 5B`Ay
nStartPos += fileAccessI.write(b,0,nRead); Y\luz`v
//if(nThreadID == 1) &n+3^JNl
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); n-[J+DdB
} uZ][#[u
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Utility.log("Thread " + nThreadID + " is over!"); J&%vBg^
bDownOver = true; E"!C3SC [
//nPos = fileAccessI.write (b,0,nRead); dP[l$/
} qG3 [5lti
catch(Exception e){e.printStackTrace ();} jXq~ x"(
} xevG)m
} -]"=b\Q
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//打印回应的头信息 Dv?'(.z
public void logResponseHead(HttpURLConnection con) 'bp*hqG[
{ xxOo8+kA
for(int i=1;;i++) `"QUA G
{ g{wIdV
String header=con.getHeaderFieldKey(i); (v(!l=3
if(header!=null) .CH0PK=l
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ;m$F~!Y
Utility.log(header+" : "+con.getHeaderField(header)); =t1.j=oC
else d
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break; un0tzz
} } Zu2GU$6
} (yQ]n91 Q,
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public void splitterStop() 6#VG,'e3
{ Okm&b g
bStop = true; QA7SQcd,
} eA9U|&o
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} v<iMlOEt
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/* +;SQ}[
**FileAccess.java o<P@:}K
*//文件访问(定位,写) :Z(?Ct&8
package NetFox;
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import java.io.*; Srj%6rgsB
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public class FileAccessI implements Serializable{ CBdSgHA3>
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 k+S+: 5
RandomAccessFile oSavedFile; -a(f-
long nPos; Jhu<^pjs
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public FileAccessI() throws IOException F4X/ )$Dk
{ 'TpW-r:
this("",0); l!e8=QlJ
} l=*^FK]L`
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public FileAccessI(String sName,long nPos) throws IOException 'JY*K:-
{ UI|L;5
oSavedFile = new RandomAccessFile(sName,"rw"); D.xN_NK"
this.nPos = nPos; _ b}\h,Ky
oSavedFile.seek(nPos); hH:7
} @<Au|l`
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public synchronized int write(byte[] b,int nStart,int nLen) ~LGkc
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{ ElAJR4'{*i
int n = -1; )%%RI_JT
try{ cAC2Xq
oSavedFile.write(b,nStart,nLen); eU_|.2
n = nLen; R-]QU`c
} _H@s^g
catch(IOException e) dj4 g
{ {;^booq
e.printStackTrace (); Us.yKAHPV
} `Yp\.K z
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return n; E(tdL,m'
} g(<02t!OT=
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/* 1Lwi?~!LI
**SiteInfoBean.java C3-l(N1O{
*/ pVn6>\xa
package NetFox; f]"][!e!,
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public class SiteInfoBean { E>TD`
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private String sSiteURL; //Site's URL A=|LMJMWR
private String sFilePath; //Saved File's Path q:#,b0|bv
private String sFileName; //Saved File's Name -_'M
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private int nSplitter; //Count of Splited Downloading File pr>Qu:
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