/* eLV[U
**SiteFileFetch.java 5{IbKj|
*/ RSw;b.t7
package NetFox; r%>7n,+o
import java.io.*; OHnsfXO_V
import java.net.*; glkH??S
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public class SiteFileFetch extends Thread { PCa0I^d
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SiteInfoBean siteInfoBean = null; //文件信息Bean 83aWMmA(1
long[] nStartPos; //开始位置 ^>eV}I5ak
long[] nEndPos; //结束位置 8o).q}>&
FileSplitterFetch[] fileSplitterFetch; //子线程对象 <K>qK]|C
long nFileLength; //文件长度 G_WHW(8
boolean bFirst = true; //是否第一次取文件 W@%g_V}C*
boolean bStop = false; //停止标志 o3NB3@uj<
File tmpFile; //文件下载的临时信息 `=Bv+
DataOutputStream output; //输出到文件的输出流 v-"nyy-&Z
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 0,8RA_Ca}
public SiteFileFetch(SiteInfoBean bean) throws IOException C~nL3w
{ 3{Zd<JYg4-
siteInfoBean = bean; ZsYY)<n
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); l&mY}k
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); v0bP|h[t
if(tmpFile.exists ()) HV]u9nrt#
{ u?>8`]r
bFirst = false; 64<*\z_
read_nPos(); 9T1-{s
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} 3;!!`R>e
else MOi1+`kwh
{ :2XX~|
nStartPos = new long[bean.getNSplitter()]; sv#b5,>9
nEndPos = new long[bean.getNSplitter()]; s"2+H}u
} WY5HmNX3E
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} ^V]IPGV
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public void run() TZ}y%iU:mB
{ m}>Q#IVZ
//获得文件长度 A>RK3{7
//分割文件 }gE^HH'
//实例FileSplitterFetch <7gv<N6BQf
//启动FileSplitterFetch线程 "x0KiIoPk
//等待子线程返回 ?N@[R];
try{ zH#urF6<
if(bFirst) 5{v uN)K3
{ 0h{&k7T<7
nFileLength = getFileSize(); GNHW bC6_m
if(nFileLength == -1) OsRizcgdA
{ UgZL<}
System.err.println("File Length is not known!"); g'2;///
} F%O+w;J4
else if(nFileLength == -2) <,U$Y>
{ mHH>qW{`
System.err.println("File is not access!"); .*J /F$
} PR,8c
else VtGZB3
{ _?eT[!oO8
for(int i=0;i<nStartPos.length;i++) IABF_GwF
{ CT'#~~QB
nStartPos = (long)(i*(nFileLength/nStartPos.length)); XPnHi@x
} !!cN4X
for(int i=0;i<nEndPos.length-1;i++) [h8macx
{ vY,D02EMw
nEndPos = nStartPos[i+1];
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} Z.s0ddMs
nEndPos[nEndPos.length-1] = nFileLength; (CJx Y(1K
} A5_r(Z-5
} Ue"pNjd|
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//启动子线程 GLMpWD`Wo
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Dz8aJ6g
for(int i=0;i<nStartPos.length;i++) tX,x% (
{ fX>y^s?y
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ToD_9i
}6
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), D.ySnYzh
nStartPos,nEndPos,i); _N0N#L4M
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /a6i`
fileSplitterFetch.start(); 2@I0p\a
} J6<O|ng::
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /Ba/gq0j
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); QUh`kt(E
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", .8;0O
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nEndPos = " + nFileLength); "^Y zHq6
// fileSplitterFetch[nPos.length-1].start(); P'*Fd3B#A=
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//等待子线程结束 rZ2cC#
//int count = 0; P?zaut
//是否结束while循环 x@[6u
boolean breakWhile = false; e0<O6
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while(!bStop) KleiX7
{ 5Yww,s
write_nPos(); oY7jj=z#T
Utility.sleep(500); tk>J
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breakWhile = true; M|{NC`fa
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for(int i=0;i<nStartPos.length;i++) ~=|QPO(d
{ J93xxj
if(!fileSplitterFetch.bDownOver) t 6lwKK
{ #&%>kfeJ)<
breakWhile = false; i?7?I
break; "b%FkD
} kv;P2:"|
} 77ztDQDtM
if(breakWhile) Ds#BfP7a
break; | IS$Om
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//count++; aK7}}
//if(count>4) !%.=35NS@E
// siteStop(); i6g=fx6j*
} v-/vj/4>
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System.err.println("文件下载结束!"); {w7/M]m-
} ExeZj8U
catch(Exception e){e.printStackTrace ();} E=`/}2
} c5:X$k\
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//获得文件长度 sz%_9;`dpL
public long getFileSize() mkl^2V13~
{ 1I)oT-~
int nFileLength = -1; C2\zbC[qm
try{ A~ _2"
URL url = new URL(siteInfoBean.getSSiteURL()); *N"CV={No
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); n=|% H'U
httpConnection.setRequestProperty("User-Agent","NetFox"); C7DwA/$D
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int responseCode=httpConnection.getResponseCode(); n7yp6Db
if(responseCode>=400) -:OJX #j
{ FZLx.3k4
processErrorCode(responseCode); c] t@3 m
return -2; //-2 represent access is error h_SkX@"/-
} II!~"-WH
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String sHeader; TPak,h(1
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for(int i=1;;i++) \ Ce*5h
{ e`OQ6|.k8
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 1:>F{g
//Utility.log(in.readLine()); Ez-Q'v(9
sHeader=httpConnection.getHeaderFieldKey(i); _l"nwEs
if(sHeader!=null) lk[Y6yE
{ L"n)fe$
if(sHeader.equals("Content-Length")) >[;=c0(
{ h9#)Eo
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); n.z,-H17
break; PB?2{Cj
} c&FOt
} 0U H]
else RZ;s_16GQ
break; Poa&htxe1
} py+\e"s
} 32j}ep.*
catch(IOException e){e.printStackTrace ();} Dad$_%
catch(Exception e){e.printStackTrace ();} z|X6\8f
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Utility.log(nFileLength); V)N{Fr)&
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return nFileLength; RtzSe$O
} >%0$AW|Exu
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//保存下载信息(文件指针位置) nSC2wTH!1
private void write_nPos() @NqwJ.%g
{ q!?*M?Oz
try{ Y)+q[MZ R
output = new DataOutputStream(new FileOutputStream(tmpFile)); O#^H.B
output.writeInt(nStartPos.length); \7"|'fz
for(int i=0;i<nStartPos.length;i++) I
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{ G3%Ju=
// output.writeLong(nPos); )1KyUQ\e
output.writeLong(fileSplitterFetch.nStartPos); l-l7jq]R
output.writeLong(fileSplitterFetch.nEndPos); V3cKbk7~
} x|(pmqIH+
output.close(); \ "$$c
} )<:TpMdUk
catch(IOException e){e.printStackTrace ();} .\glNH1d
catch(Exception e){e.printStackTrace ();} T9H*]LxK
} L/V^ #$
});Rjg
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//读取保存的下载信息(文件指针位置) DQm%=ON7
private void read_nPos() e)g&q'O
{ n=vDEX:'
try{ *{!Y_FrL
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); fzQR0
int nCount = input.readInt(); $R1I(sJ
nStartPos = new long[nCount]; ,0q1Id
nEndPos = new long[nCount]; ]MosiMJF
for(int i=0;i<nStartPos.length;i++) h0@a"DqK
{ f$ xp74hw3
nStartPos = input.readLong(); d6YXITL)\>
nEndPos = input.readLong(); 2_+>a"8Y
} 6AGZ)gX
input.close(); hN
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} Bhd)# P
catch(IOException e){e.printStackTrace ();} JHt
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catch(Exception e){e.printStackTrace ();} I}3F'}JV<
} %BP>,E/w
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private void processErrorCode(int nErrorCode) bYnq,JRA
{ $2?AJ/2r$b
System.err.println("Error Code : " + nErrorCode); 0!_?\)X
} #e|o"R;/`
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dD=$$(
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//停止文件下载 a3tcLd|7J
public void siteStop() 49$<:{ ~
{ 7upko9d/
bStop = true; ]HuB%G|t1V
for(int i=0;i<nStartPos.length;i++) _9
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fileSplitterFetch.splitterStop(); Y \-W`
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} >8>!wi9U
} ,=P&{38\q
//负责部分文件的抓取 =GPXuo
**FileSplitterFetch.java 3k`Q]O=OU
*/ |Ev|A9J!
package NetFox; d8wVhZKI"
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import java.io.*; 30!DraW8
import java.net.*; (WyNO QO'
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public class FileSplitterFetch extends Thread { /I=|;FGq
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String sURL; //File URL %o0b~R
long nStartPos; //File Snippet Start Position P 0,]`w
long nEndPos; //File Snippet End Position IR6W'vA
int nThreadID; //Thread's ID @MES.g
boolean bDownOver = false; //Downing is over /\w4k
boolean bStop = false; //Stop identical f^uiZb
FileAccessI fileAccessI = null; //File Access interface 4]h/t&ppq
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException &q-&%~E@
{ AG@gOm
this.sURL = sURL; c>_ti+
this.nStartPos = nStart; Hd|[>4 Z
this.nEndPos = nEnd; <l{oE?N
nThreadID = id; k&ci5MpN
fileAccessI = new FileAccessI(sName,nStartPos);//定位 &zdS9e-fF
} ""0Y^M2I
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public void run() 9\_AB.Z:
{ /?'~`4!(
while(nStartPos < nEndPos && !bStop) K ze?@*
{ fp' '+R[
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try{ WigtTAh4
URL url = new URL(sURL); _O`p (6
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); h0tiWHw
httpConnection.setRequestProperty("User-Agent","NetFox"); P R%)3
String sProperty = "bytes="+nStartPos+"-"; )@NFV*@I
httpConnection.setRequestProperty("RANGE",sProperty); i1vz{Tc
Utility.log(sProperty); d4S4
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InputStream input = httpConnection.getInputStream(); r&]XNq'P9
//logResponseHead(httpConnection); wk|+[Rl;L
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byte[] b = new byte[1024]; o$*(N
int nRead; <fvu)
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while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Nw*<e ]uD
{ W"c\/]aD
nStartPos += fileAccessI.write(b,0,nRead); ?+t;\
//if(nThreadID == 1) ys9:";X;}
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); >dl5^
} 4YfM.~
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Utility.log("Thread " + nThreadID + " is over!"); (U:-z=E#1
bDownOver = true; cRLw)"|
//nPos = fileAccessI.write (b,0,nRead); ,HZ%q]*:~
} |?T=4~b
catch(Exception e){e.printStackTrace ();} ihrf/b
} fDy*dp4z
} uy{O
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//打印回应的头信息 CvU$Fsb
public void logResponseHead(HttpURLConnection con) >+M[!;m}
{ 8^UF0>`'
for(int i=1;;i++) jY=y<R_oK
{ @_ %RQO_X
String header=con.getHeaderFieldKey(i); cMY}Y
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if(header!=null) [c,V=:Cq
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ;'S,JGpvT
Utility.log(header+" : "+con.getHeaderField(header)); 3FiK/8mu
else /vSGmW-*
break; `K{}
} 1>Sfv|ZP,
} )'+[,z ;s
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public void splitterStop() EO !,rB7I
{ t2dsYU/
bStop = true; sX1DbEjj[o
} 9JA@m
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} :h(HKMSk1
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/* Y_%:%J
**FileAccess.java xuXPVJdi
*//文件访问(定位,写) <XLae'R
package NetFox; d5'Q1"{
import java.io.*; ]o] VS
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public class FileAccessI implements Serializable{ s<YN*~
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Ey=2zo^F
RandomAccessFile oSavedFile; apL$`{>US
long nPos; aO1^>hy
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public FileAccessI() throws IOException eo]nkyYDP
{ IWv(GQx
this("",0); g{N}]_%Uh
} [icD*N<Gc
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public FileAccessI(String sName,long nPos) throws IOException 3 yx[*'e$
{ ljbAfd
oSavedFile = new RandomAccessFile(sName,"rw"); 1V2]@VQF
this.nPos = nPos; |=q~X}DA
oSavedFile.seek(nPos); M(C">L]8
} HyzSHI
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public synchronized int write(byte[] b,int nStart,int nLen) V(`]hH0;T
{ _#{ *I(l
int n = -1; ~R|9|k
try{ Tt: (l/1
oSavedFile.write(b,nStart,nLen); 2;Z
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n = nLen; 6{)pF
} _^_3>}y5op
catch(IOException e) og";mC
{ xT>9ZZcE
e.printStackTrace (); V|YQhd0kv
} 89M'klZ
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return n; ?M:>2wl
} eA&