/* ue$\i =jw
**SiteFileFetch.java pWB)N7x&
*/ _'dsEF
package NetFox; }$;T.[ ~
import java.io.*; ^ ;$f-e
import java.net.*; VzMoWD;
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public class SiteFileFetch extends Thread { ~^IS{1
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SiteInfoBean siteInfoBean = null; //文件信息Bean gNzQ"W=
long[] nStartPos; //开始位置 6lq7zi}'w
long[] nEndPos; //结束位置 M>0=A
FileSplitterFetch[] fileSplitterFetch; //子线程对象 NJ7N*
long nFileLength; //文件长度 7Z"mVh}
boolean bFirst = true; //是否第一次取文件 wI}5[m
boolean bStop = false; //停止标志 ZsUxO%jP
File tmpFile; //文件下载的临时信息 ~|pVz/s|G
DataOutputStream output; //输出到文件的输出流 GOa](oD}
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) l0u6nGkh
public SiteFileFetch(SiteInfoBean bean) throws IOException F1)Q#ThF\
{ ^,b*.6t
siteInfoBean = bean; l@<^V N@
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); B.K"1o
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); OcMd'fwO
if(tmpFile.exists ()) Yk:fV &]
{ )"jG)c^1*
bFirst = false; 9ToM5oQ
read_nPos(); 7|T5N[3?l,
} .?_wcp=
else |VlAt#E
{ Rmn| "ZK
nStartPos = new long[bean.getNSplitter()]; zV4%F"-
nEndPos = new long[bean.getNSplitter()]; %7O`]ik:
} {mw,U[C
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} PFG):i-?
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public void run() }o=R7n%
{ X5qU>'?`
//获得文件长度 EFf<|v
//分割文件 &EXql']
//实例FileSplitterFetch \@['V
//启动FileSplitterFetch线程 "a5?cX;
//等待子线程返回 p4W->AVv$
try{ 68Wm=j.m
if(bFirst) ~{Tus.jk
{ 2[9hl@=%
nFileLength = getFileSize(); idPkJf/
if(nFileLength == -1) zBB4lC{q
{ y= cBpC
System.err.println("File Length is not known!"); 05DK-Wh?
} }N2T/U
else if(nFileLength == -2) C
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{ -q(,}/Xf
System.err.println("File is not access!"); A<9ZX=DAjw
} H=Yl
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else O jE wJ$$
{ ;r^8In@6
for(int i=0;i<nStartPos.length;i++) 3r+vp yu
{ H]UM2.
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 4zpprh+`K
} I@+dE V`Lf
for(int i=0;i<nEndPos.length-1;i++) k-Jj k3
{ L;fhJ~r
nEndPos = nStartPos[i+1]; aMZ6C <N
} DD"]as"#
nEndPos[nEndPos.length-1] = nFileLength; D
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} 2ztP'
} G5"UhnOD'
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//启动子线程 ,U],Wu)
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 7AV !v`
for(int i=0;i<nStartPos.length;i++) 6}n_r}kNR
{ f/*Xw {s#
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #XQEfa
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ysGK5kFz
nStartPos,nEndPos,i); 4FGcCE3
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ~-A5h(
fileSplitterFetch.start(); >e=tem~/
} ;[ pyKh
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), p8%x@%k
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); xo6-Y=c8
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", jGb+bN5U7
nEndPos = " + nFileLength); _?Rprmjx}
// fileSplitterFetch[nPos.length-1].start(); Jq<&`6hn
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//等待子线程结束 a7%5Qg9B;
//int count = 0; \P^WUWY
//是否结束while循环 deQ0)A 4g
boolean breakWhile = false; )f*&}SV
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while(!bStop) 52C>f6w
{ +Z/*=;
write_nPos(); P"XF|*^U
Utility.sleep(500); R',Q)<
breakWhile = true; )_,*2|b
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for(int i=0;i<nStartPos.length;i++) pTprU)sa7
{ Kxn/@@z>u
if(!fileSplitterFetch.bDownOver) ZMt9'w;
{ PL@hsZty~c
breakWhile = false; !)?n n3
break; K``MS
} Cf91#%:cN
} =$X5O&E3'
if(breakWhile) Oq7M1|{
break; 58DkVQ 6
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//count++; MT[V1I{LV
//if(count>4) P6u9Ngay
// siteStop(); -=H*(M
} )^qM%k8
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System.err.println("文件下载结束!"); IlVz 5#R
} MCZTeYnx
catch(Exception e){e.printStackTrace ();} E2 Q[
} 6}6;%{p"Gu
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//获得文件长度 qjFz}6
public long getFileSize() N7Kq$G2O
{ V7U&8UPb
int nFileLength = -1; >v7fR<(%s
try{ V7[6jWgH
URL url = new URL(siteInfoBean.getSSiteURL()); 9utiev~3
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); =
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httpConnection.setRequestProperty("User-Agent","NetFox"); Jr$,w7tQn@
}TY}sr
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int responseCode=httpConnection.getResponseCode(); *1"xvle
if(responseCode>=400) g HdNqOy
c
{ #?\$*@O
processErrorCode(responseCode); H.*:+
return -2; //-2 represent access is error `Fnl<C<
} B>Tfyo
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String sHeader; @ x_.
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for(int i=1;;i++) w^OV;gp
{ 8,B?!%FP
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Fa<>2KkOr
//Utility.log(in.readLine()); i[_(0P+Da
sHeader=httpConnection.getHeaderFieldKey(i); Q6blX6DWU
if(sHeader!=null) }<R,)ZV^G
{ [Jv0^"]
if(sHeader.equals("Content-Length")) .c__<I<G<
{ mN^w?R41m
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); URU,&gy=
break; ,;;7+|`
} \ #<.&`8B
} sZe$?k|
else KaVNRS
break; s?Lx\?T
} b-?wJSf|
} paKur%2u
catch(IOException e){e.printStackTrace ();}
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catch(Exception e){e.printStackTrace ();} LLy w9y1
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Utility.log(nFileLength);
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return nFileLength; CD^C}MB
} WX"iDz.
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//保存下载信息(文件指针位置) 7Qdf#DG
private void write_nPos() ,+w9_Gy2H
{ Z9
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try{ \c')9g@
output = new DataOutputStream(new FileOutputStream(tmpFile)); o<h2]TN
output.writeInt(nStartPos.length); x[?N[>uw
for(int i=0;i<nStartPos.length;i++) k1lo{jw`
{ SjosbdD
// output.writeLong(nPos); (vX)
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output.writeLong(fileSplitterFetch.nStartPos); ;X_bDiG$
output.writeLong(fileSplitterFetch.nEndPos); oW}nr<G{<
} J`6IH#54
output.close(); o*MiKgQ&
} .7K)'
catch(IOException e){e.printStackTrace ();} 5)5$h]Nz>
catch(Exception e){e.printStackTrace ();} @h&:xA56
} Ky0}phGRu
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//读取保存的下载信息(文件指针位置) C/$bgK[ev
private void read_nPos() "D\>oFu
{ *S xDwN
try{ !hs33@*u~
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); $e~MKLd
int nCount = input.readInt(); ?^whK<"]
nStartPos = new long[nCount]; `
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nEndPos = new long[nCount]; U[0x\~[$K
for(int i=0;i<nStartPos.length;i++) bO i-QD
{ {MRXKnm;e
nStartPos = input.readLong(); gt(^9t;
nEndPos = input.readLong(); mEm=SpO[$o
} <ni_78
input.close(); T_)g/,5>
} 57fl<IM
catch(IOException e){e.printStackTrace ();} iQJa6QF&:
catch(Exception e){e.printStackTrace ();} $:?Dyu(Il
} ZveNe~D7C
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private void processErrorCode(int nErrorCode) S$O5jX 0
{ 2tb+3K1
System.err.println("Error Code : " + nErrorCode); "ejsz&n
} {Gr"lOi*@
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//停止文件下载 Z0/$XS9|h;
public void siteStop() 6b7c9n Z
{ PNz]L
bStop = true; s{Og3qUy
for(int i=0;i<nStartPos.length;i++) y6dQ4Whv&
fileSplitterFetch.splitterStop(); {Rdh4ZKh
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} $bDaZGy
}
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//负责部分文件的抓取 A<]
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**FileSplitterFetch.java bv;.6C(T<
*/ sf0\#Q
package NetFox; hx*4xF
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import java.io.*; 8(Q|[
import java.net.*; K.=5p/^a
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public class FileSplitterFetch extends Thread { i)] f0F
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String sURL; //File URL aX~Jk >a0
long nStartPos; //File Snippet Start Position Lu~E5 ,
long nEndPos; //File Snippet End Position lUaJC'~p
int nThreadID; //Thread's ID gAh#H ?MM
boolean bDownOver = false; //Downing is over ^D1gcI
boolean bStop = false; //Stop identical Uqz.Q\A
FileAccessI fileAccessI = null; //File Access interface @tJ4^<`P{
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException blWtC/!Aq;
{ ,N_/J4Us
this.sURL = sURL; ?S'aA!/;
this.nStartPos = nStart; Vo6+| ztk|
this.nEndPos = nEnd; *T#^|<.XG
nThreadID = id; ?K;l 5$?%
fileAccessI = new FileAccessI(sName,nStartPos);//定位 F\hVunPVx
} pH2/."zE<
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public void run() -$kIVh
{ pGfGGY>i%
while(nStartPos < nEndPos && !bStop) gTgoS:M"_O
{ i6A9|G$H
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try{ $Mj\ 3
URL url = new URL(sURL); V%)Tu{L
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); *7-rm
httpConnection.setRequestProperty("User-Agent","NetFox"); ).IyjHY
String sProperty = "bytes="+nStartPos+"-"; }JWkV1
httpConnection.setRequestProperty("RANGE",sProperty); *`|xa@1v`
Utility.log(sProperty); ;c)(
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InputStream input = httpConnection.getInputStream(); +Z2XP76(4A
//logResponseHead(httpConnection); Qclq^|O0
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byte[] b = new byte[1024]; w~'}uh
int nRead; f1v4h[)-
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) |IV7g*J89
{ W8$0y2
nStartPos += fileAccessI.write(b,0,nRead); t$~'$kM)<
//if(nThreadID == 1) oPF]]Imu
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); GB^ `A
} `'^o45
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Utility.log("Thread " + nThreadID + " is over!"); i9De+3VqKK
bDownOver = true; JB].ht
//nPos = fileAccessI.write (b,0,nRead); [FrLxU
} *!JB^5(H
catch(Exception e){e.printStackTrace ();} uDXV@;6<
} QRK\74'uY
} enZZ+|h
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//打印回应的头信息 <qpzs@
public void logResponseHead(HttpURLConnection con) Osm))Ua(
{ 1%*\*z
for(int i=1;;i++) PZJ9f8V
{ __Ksn^I
String header=con.getHeaderFieldKey(i); -y$6gCRY
if(header!=null) (AtyM?*
//responseHeaders.put(header,httpConnection.getHeaderField(header)); mB"I(>q*M
Utility.log(header+" : "+con.getHeaderField(header)); 7L6L{~8
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else Fz,jnV9=j
break; Y1I)w^}:
} _fu <`|kc
} #"rK1Z
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public void splitterStop() (g/A uL
{ isd-b]@:Lc
bStop = true; [%^sl>,7
} 1S!}su,uH
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} ?YS>_MN
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/* -ycYQ~R
**FileAccess.java o}114X4q;
*//文件访问(定位,写) QJ4$) Fr(
package NetFox; "QNQ00[T`>
import java.io.*; Vez8~r3
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public class FileAccessI implements Serializable{ =dDPQZEin
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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 aMhVO(+FW
RandomAccessFile oSavedFile; wCNn/%C
long nPos; %eg +.
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public FileAccessI() throws IOException }rfikm
{ w=WF$)ZU
this("",0); |*NZ^6`@
} Lo!hyQ)
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public FileAccessI(String sName,long nPos) throws IOException EwN{| 34C
{ 8(\}\4G_
oSavedFile = new RandomAccessFile(sName,"rw"); Mt-r`W3 q
this.nPos = nPos; MmjZq
oSavedFile.seek(nPos); WSH[*jMA
} vnvpb!
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public synchronized int write(byte[] b,int nStart,int nLen) _Pqq*
{ ]A=\P,D
int n = -1; r9_ ON|
try{ <N= k&\
oSavedFile.write(b,nStart,nLen); )dhR&@r*w
n = nLen; H
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} 5U475&
catch(IOException e) )DXt_leLg
{ S"h;u=5it
e.printStackTrace (); xyGwYv>*KO
} AuXUD9-
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return n; uxU-N
} }Kgi!$<aQx
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} bu _ @>`S
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/* .pUB.l$)
**SiteInfoBean.java h(/? 81:
*/
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package NetFox; M?h{'$T
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public class SiteInfoBean { |:R\j0t
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private String sSiteURL; //Site's URL L[2qCxB'^
private String sFilePath; //Saved File's Path I_ZJnu<
private String sFileName; //Saved File's Name &}p\&4
private int nSplitter; //Count of Splited Downloading File {S=<(A@
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public SiteInfoBean() "mJo<i}
{//nSplitter的缺省值为5 0vqH-)}
//default value of nSplitter is 5 ElW\;C:K*
this("","","",5); <
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} FFw(`[A_
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) zq</(5H
{ \XB,)XDB
sSiteURL= sURL; R@3HlGuRKw
sFilePath = sPath; v"1&xe^4
sFileName = sName; XE2Un1i}j1
this.nSplitter = nSpiltter;
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} QIkFX.^
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public String getSSiteURL() }SSg>.48w
{ Wmd@%K
return sSiteURL; rB+ (
} En&7 e
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public void setSSiteURL(String value) hFA |(l6
{ D/=05E%[81
sSiteURL = value; oqwW
} ti+e U$
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public String getSFilePath() -4QZ/ *
{ X{#^O/
return sFilePath; ODu/B'*
} PNAvT$0LaZ
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public void setSFilePath(String value) 3|$?T|#B
{ v>K|hH
sFilePath = value; ? /!Fv/
} zk$h71<{.
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public String getSFileName() i-0
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{ 2f:h z
return sFileName; ]Qe~|9I
} Z%o.kd"
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public void setSFileName(String value) 3SWDPy
{ MkVv5C
sFileName = value; Q']'KU.
} rIPg,4y*S!
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public int getNSplitter() 0 F8xS8vK+
{ !(bYh`Uy
return nSplitter; n\Is}Czl
} u^C\aujg
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public void setNSplitter(int nCount) :D}?H@(69
{ P `<TO
nSplitter = nCount; ST#)Fl
} b^[>\s'
} xz@*V>QT
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/* uR")@Tc
**Utility.java dh}"uM}a
*/ jY9tq[~/
package NetFox; ,f>^q"
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public class Utility { ,EH-Sf2Cb
!b K;/)
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public Utility() ~&0lWa
{ +7"UF)
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} Rp
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//线程睡眠 T?n [1%K
public static void sleep(int nSecond) ?fU{?nI}>p
{ 4`CO>Q
try{ UWCm:eRQ
Thread.sleep(nSecond); I`{=[.c
} fb8xs<
catch(Exception e) >hnhV6ss
{ @ bvWqMa
e.printStackTrace (); m&*0<N
} }/ xdHt
} ^SUo-N''
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//日志 0,LUi*10
public static void log(String sMsg) IxlPpS9Wx
{ F0'o!A#|(
System.err.println(sMsg); sYTToanA$?
} /{ 8 .Jcx$
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public static void log(int sMsg) n 8|
{ (yeN> x}_
System.err.println(sMsg); +zFEx%3^
} B8-Y)u1G
} \ ]h$8JwV
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1 rmN)
/* zy9W{{:P(1
**TestMethod.java 0?g&