/* h=MEQ-3jg
**SiteFileFetch.java d&t,^Hj
*/ +E
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package NetFox; +;N;r/d_i
import java.io.*; ?4YLt|sn
import java.net.*; \vqqs
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public class SiteFileFetch extends Thread { aJ$({ZN\#
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SiteInfoBean siteInfoBean = null; //文件信息Bean ow K)]t
long[] nStartPos; //开始位置 `-w;/A"MJ
long[] nEndPos; //结束位置 CsiRM8
FileSplitterFetch[] fileSplitterFetch; //子线程对象 tk!5"`9N
long nFileLength; //文件长度 J)="Im)
boolean bFirst = true; //是否第一次取文件 ^.@F1k
boolean bStop = false; //停止标志 kJ.0|l0
File tmpFile; //文件下载的临时信息 0K^?QM|S
DataOutputStream output; //输出到文件的输出流 K5}0!_)G
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ~Nn}FNe
public SiteFileFetch(SiteInfoBean bean) throws IOException #7p!xf^
{ oR'u&\mB
siteInfoBean = bean; ^BhS*
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); }sW%i#CV
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ibh,d.*~g
if(tmpFile.exists ()) |a>,FZv8e
{ ;]^% 6B n
bFirst = false; dnCurWjdk
read_nPos(); .g!K| c
} ZFRKzPc
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else z2[{3Kd*
{ cSYMnB
nStartPos = new long[bean.getNSplitter()]; 5N:IH@
nEndPos = new long[bean.getNSplitter()];
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} "43F.!P
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} _~O*V&
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public void run() ^JAp#?N^9
{ I9*BTT]
//获得文件长度 3_ko=& B$
//分割文件 'C)
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//实例FileSplitterFetch DIx.a^LR
//启动FileSplitterFetch线程 %{&,5|8
//等待子线程返回 59BB-R,V
try{ nfksi``Vq
if(bFirst) t
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{ 3>mAZZL5[
nFileLength = getFileSize(); j?1wP6/NP
if(nFileLength == -1) 1x^Vv;K
{ LpN3cy>U
System.err.println("File Length is not known!"); ;Pe=cc"@
} 1C(sBU"
else if(nFileLength == -2) +P%k@w#<Z
{ Ik-E_U2
System.err.println("File is not access!"); fw)Q1"|
} VE?Aa
else $0|`h)&
{ )Bu#ln"
for(int i=0;i<nStartPos.length;i++) ji.T7wn1u
{ 5:(/k\9+yv
nStartPos = (long)(i*(nFileLength/nStartPos.length)); o2!wz8
} 6o4Y]C2W{1
for(int i=0;i<nEndPos.length-1;i++) JJy.)-R
{ `\J,%J
nEndPos = nStartPos[i+1]; U<<XeSp
} 8&3KVd`
nEndPos[nEndPos.length-1] = nFileLength; {%c&T S@s
} WaSZw0U}y
} 06]"{2
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//启动子线程 o+Fm+5t;
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Ako]34Rl,
for(int i=0;i<nStartPos.length;i++) KkCsQ~po
{ wlgR =l
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), D!&]jkUN
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), F ESl#.}
nStartPos,nEndPos,i); /h8100
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); r+;k(HMY}[
fileSplitterFetch.start(); iP6?[pl8
} NuW6~PV
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), N9 h|_ax
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ]A%~bQ7
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", \}W !
nEndPos = " + nFileLength); /}9)ZYMx
// fileSplitterFetch[nPos.length-1].start(); )YW"Zo8~!1
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//等待子线程结束 "RgP!
//int count = 0; AkCy
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//是否结束while循环 !,]2.:{0z
boolean breakWhile = false; c#TV2@
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while(!bStop) 6j95>} @
{ #4<=Ira5
write_nPos(); !*S,S{T8
Utility.sleep(500); aW9\h_$
breakWhile = true; xjD."q
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for(int i=0;i<nStartPos.length;i++) 9sI&d
{ *7b?.{
if(!fileSplitterFetch.bDownOver) Vh>|F}%E
{ u U%Z%O
breakWhile = false; LW k/h1
break; W8F@nY
} r+k&W
} E1SWZ&';
if(breakWhile) bo1J'pU
break; Swh\^/B8
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//count++; %7 QSBL
//if(count>4) 31UxYBY
// siteStop(); S|af?IW
} ;hF}"shJN
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System.err.println("文件下载结束!"); AN3oh1xe:
} suE8"v!sk
catch(Exception e){e.printStackTrace ();} [5ncBY*A7
} uQ|LkL%<^
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//获得文件长度 #+i:s92],
public long getFileSize() B):ZX#
{ LcB+L](
int nFileLength = -1; ^+~5\c*
try{ cQ'x]u_
URL url = new URL(siteInfoBean.getSSiteURL()); 3iUJ!gK
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); h=\1ZQKC)
httpConnection.setRequestProperty("User-Agent","NetFox"); I L,l XB<
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int responseCode=httpConnection.getResponseCode(); ]=9 d'WL
if(responseCode>=400) %a|Qw(4\
{ oUO3,2bn
processErrorCode(responseCode); &nwS7n1eb
return -2; //-2 represent access is error pU'${Z~b
} ]#W7-Q;]
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String sHeader; { ^^5FE)%
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for(int i=1;;i++) E0/>E
{ RN|Bk
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); u})*6 l.
//Utility.log(in.readLine()); 7r^Cs#b+I
sHeader=httpConnection.getHeaderFieldKey(i); (>E/C^Tc%
if(sHeader!=null) #d*0
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{ ({@"{
if(sHeader.equals("Content-Length")) 5D2mZ/
{ 5gV,^[E-z
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); DBG0)=SHy
break; v9FR
} ,]nRnI^
} :y`LF<
else \F-n}Z
break; ,|A6l?iV
} ?@Q0;LG
} }EYmz/nN
catch(IOException e){e.printStackTrace ();} :5$ErI
catch(Exception e){e.printStackTrace ();} ITg:OOQ
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Utility.log(nFileLength); v#d(Kj
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return nFileLength; ](v,2(}=
} cMF)2^w}
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//保存下载信息(文件指针位置) OI*ltba?
private void write_nPos() *aC[Tv[-P
{ [s`B0V`04
try{ [[]yQ
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output = new DataOutputStream(new FileOutputStream(tmpFile)); -G@uB_C s
output.writeInt(nStartPos.length); he/rt#
for(int i=0;i<nStartPos.length;i++) G[]%1
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{ #d3_7rI0V
// output.writeLong(nPos); V= p"1!(
output.writeLong(fileSplitterFetch.nStartPos); e$P^},0/
output.writeLong(fileSplitterFetch.nEndPos); TB?'<hD:
} 0Ze&GK'Hf
output.close(); &WLN
} R9^vAS4t[O
catch(IOException e){e.printStackTrace ();} maHz3:
catch(Exception e){e.printStackTrace ();} wr:W}Z@pL
} FyWf`XTO
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//读取保存的下载信息(文件指针位置) qoH:_o8ClO
private void read_nPos() {5D%<Te
{ X@}7 #Vt
try{ .a :7|L#a
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 1Az&BZU[
int nCount = input.readInt(); 5+!yXkE^e
nStartPos = new long[nCount]; Pv,PS.,-
nEndPos = new long[nCount]; V6](_w!
for(int i=0;i<nStartPos.length;i++) :RukW.MR
{ $xdo=4;|
nStartPos = input.readLong(); pfIK9>i
nEndPos = input.readLong(); xzOvc<u
} EtPB_!
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input.close(); EPLHw
} {fDRVnI?
catch(IOException e){e.printStackTrace ();} 37:tu7e~c
catch(Exception e){e.printStackTrace ();} QxaMe8(
} Og1\6Q
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private void processErrorCode(int nErrorCode) IKnf
{ X_nbNql
System.err.println("Error Code : " + nErrorCode); Oi& 9FS
} )quQI)Ym
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//停止文件下载 m<z?6VC
public void siteStop() U&:-Vf~&
{ c(vi,U-hC
bStop = true; ;`c:Law4
for(int i=0;i<nStartPos.length;i++) qi7*Jjk>90
fileSplitterFetch.splitterStop(); E$4H;SN \
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} w5)KWeGa
} "N_@q2zF
//负责部分文件的抓取 /O$~)2^h
**FileSplitterFetch.java EZ/_uj2&SN
*/ )
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package NetFox; )'g4Ty
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import java.io.*; ".Q]FE@>
import java.net.*; RrrlfF ms
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public class FileSplitterFetch extends Thread { }id)~h_@
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String sURL; //File URL {wt9/IlG1
long nStartPos; //File Snippet Start Position Gdx%#@/
long nEndPos; //File Snippet End Position
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int nThreadID; //Thread's ID |B$JX'_
boolean bDownOver = false; //Downing is over *gGw/jA/
boolean bStop = false; //Stop identical ^/Yk*Ny
FileAccessI fileAccessI = null; //File Access interface ^t<L
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException s nxwe
{ ]Hi1^Y<
this.sURL = sURL; Q2]7|C
this.nStartPos = nStart; #')]~Xa
this.nEndPos = nEnd; U
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nThreadID = id; !@Vj&>mH$
fileAccessI = new FileAccessI(sName,nStartPos);//定位 J32{#\By
} `WC4:8
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public void run() xDekC~Zq
{ Bqa_l|
while(nStartPos < nEndPos && !bStop) oz:J.<j24Z
{ d3?gh[$
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try{ j+/EG^*/
URL url = new URL(sURL); -~\7ZRP8
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); tVX|e2Y
httpConnection.setRequestProperty("User-Agent","NetFox"); n31nORx50
String sProperty = "bytes="+nStartPos+"-"; _uJ6Vy
httpConnection.setRequestProperty("RANGE",sProperty); R*LPwJuv
Utility.log(sProperty); a04S&ezj
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InputStream input = httpConnection.getInputStream(); CnY dj~
//logResponseHead(httpConnection); 4U)%JK.ta
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byte[] b = new byte[1024]; F3Vvqt*2
int nRead; U;.cXU{
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) DX3jE p2
{ l<sWM$ez
nStartPos += fileAccessI.write(b,0,nRead); \B/( H)Cd*
//if(nThreadID == 1) HQ4WunH2Y
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); AC fhy[,
} B1i'Mzm-4
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Utility.log("Thread " + nThreadID + " is over!"); )F'hn+(B|G
bDownOver = true; 7A<}JaE!,
//nPos = fileAccessI.write (b,0,nRead); c-@EHv
} pAN$c"
catch(Exception e){e.printStackTrace ();} T%}x%9VO7
} +{)V%"{u:
} ,(c'h:@M
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//打印回应的头信息 \vj xCkg{
public void logResponseHead(HttpURLConnection con) s\3ZE11L
{ P8CIKoKCV
for(int i=1;;i++) <_bGV
{ =*y{y)B^g
String header=con.getHeaderFieldKey(i); b%X}{/ n
if(header!=null) }_Sgor83n
//responseHeaders.put(header,httpConnection.getHeaderField(header)); i~HS"n
Utility.log(header+" : "+con.getHeaderField(header)); 4HXNu, T'
else W"xRf0\V
break; 2V+[:>F
} 2@ZuH^qhk
} CFY4PuI"!
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public void splitterStop() @
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{ AucX4J<
bStop = true; e=u}J%|
} yaX%<KBa\
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} bV@5B#] 2R
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/* 6XeqK*r*
**FileAccess.java }T=\hM
*//文件访问(定位,写) ,}Ic($To
package NetFox; (jE[W:
import java.io.*; \ $9n
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public class FileAccessI implements Serializable{ u/?;J1z:
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 3e^'mT
RandomAccessFile oSavedFile; rf&nTDaWI
long nPos; 90$`AMR
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public FileAccessI() throws IOException j7Lw(AJ
{ lGX_5R
this("",0); `qbsDfq@
} <