/* vp9<.*h
**SiteFileFetch.java [k}\{i>
*/ sZDJ+
package NetFox; *?"{T;4u~O
import java.io.*; X($SBUS6
import java.net.*; Y\|J1I,Z4
Z!eq /
;O11)u?/s|
public class SiteFileFetch extends Thread { 9v2 ;
9Dw&b
ljON_*
SiteInfoBean siteInfoBean = null; //文件信息Bean c/U6K
yiK
long[] nStartPos; //开始位置 EQ$9IaY.
long[] nEndPos; //结束位置 Lc?O K"[m
FileSplitterFetch[] fileSplitterFetch; //子线程对象 <J`xCm K
long nFileLength; //文件长度 d vxEXy
boolean bFirst = true; //是否第一次取文件 jsQ$.)nO
boolean bStop = false; //停止标志 9-6_:N>
File tmpFile; //文件下载的临时信息 8E[`H
DataOutputStream output; //输出到文件的输出流 b\S}?{m5
b15qy? `y
//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) !
fc)
public SiteFileFetch(SiteInfoBean bean) throws IOException N
Z`hy>LF^
{ ,+9r/}K]/
siteInfoBean = bean; Y
sV
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ^W'[l al.
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); p]eD@3Wz
if(tmpFile.exists ()) >6+K"J-@
{ efR$s{n!
bFirst = false; ,ua1xsZl&
read_nPos(); V}-o):dI|
} mO.U)tL[
else 1}*;
{ zmRK%a(
nStartPos = new long[bean.getNSplitter()]; J3;KQ}F.I
nEndPos = new long[bean.getNSplitter()]; xltu
g##
} pa-4|)qY
qH"a !
*rT(dp!Y
{E|gV9g
} AAgA]OD,
s#ZH.z@J
[hbp#I~*[
public void run() 2Zip8f!
{ 'qE
//获得文件长度 F-0PmO~3+W
//分割文件 Hc|U@G
//实例FileSplitterFetch )A=g# D#
//启动FileSplitterFetch线程 eCD,[At/
//等待子线程返回 MGDv4cFE.
try{ BxYA[#fd}
if(bFirst) ]i2\2MTW8
{ : PkZ(WZ9
nFileLength = getFileSize(); !H\GHA'DO]
if(nFileLength == -1) Dj(7'jT
{ zAJUL
System.err.println("File Length is not known!"); HYmXPpse
} ,>v9 Y#U
else if(nFileLength == -2) [)vwg`]
{ C/VYu-p%
System.err.println("File is not access!"); Q@VnJ,
} UROi.976D
else MiM=fIuw@s
{ |/s2AzDD
for(int i=0;i<nStartPos.length;i++) 2tm-:CPG
{ LfXr(2u
nStartPos = (long)(i*(nFileLength/nStartPos.length)); |9Ks13?Ck
} 5>Yd\(`K
for(int i=0;i<nEndPos.length-1;i++) /+O8A}
{ q|l|mO
nEndPos = nStartPos[i+1]; ?^4sE-C6
} PGl-2Cr
nEndPos[nEndPos.length-1] = nFileLength; 6 <S&~q
} =2)t1 H
} ^T6!z^g1h
Kg-X]yu*0
g@VndAp
//启动子线程 rss.F3dK
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; /C2f;h(1
for(int i=0;i<nStartPos.length;i++) Ab<Ok\e5
{ r;8z"*
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,!u@:UBT
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), v/.h%6n?
nStartPos,nEndPos,i); .ASwX
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]Ja8i%LjOG
fileSplitterFetch.start(); A=]F_
} UZXcKl>u
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ruA+1-<f
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); <;E[)tv
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", _D,f4.R
nEndPos = " + nFileLength); kDl4t]j
// fileSplitterFetch[nPos.length-1].start(); _s-HlE?C
aX'g9E
%g@3S!lK
//等待子线程结束 'Mx K}9
//int count = 0; BRXb<M^;_
//是否结束while循环 j*~dFGl)
boolean breakWhile = false; ^@*zH?Rx{
3_*Xk.
.d
8w8I:*
while(!bStop) Hu(flc+z"
{ K[>@'P}y
write_nPos(); 0ij~e<
Utility.sleep(500); _Z66[T+M
breakWhile = true; Zjic"E1
ml33qXW:
y(3c{y@~X
for(int i=0;i<nStartPos.length;i++) >yA,@%X
{ oD#<?h)(
if(!fileSplitterFetch.bDownOver) L+~YCat|$U
{ 1'v !9
breakWhile = false; <\d|=>;
break; *iRm`)zC(
} XL7;^AE^Wl
} teOBsFy/I
if(breakWhile) H
MjeGO.i
break; q
5v?`c
Ueg N-n
<{NYD.
//count++; FSU%?PxO
//if(count>4) U.hERe~X
// siteStop(); L;--d`[
} #mRFUA
^?s~Fk_V
si^4<$Nr%j
System.err.println("文件下载结束!"); lsB9;I^+x
} dm,}Nbc91(
catch(Exception e){e.printStackTrace ();} 5rfH;`
} O@r.>
z
_O,Y
1qLl^DW
//获得文件长度 =CjNtD2]
public long getFileSize() bCA2ik
{ b'7z DZI]
int nFileLength = -1; 5PGlR!^
try{ <}EV*`w4
URL url = new URL(siteInfoBean.getSSiteURL()); ~MhgAC
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); wc7mJxJxA
httpConnection.setRequestProperty("User-Agent","NetFox"); qY$*#*Q
BKC7kDK3H
g5tjj.
int responseCode=httpConnection.getResponseCode(); #+K
Kvk
if(responseCode>=400) =% q?Cr
{ $hjP}- oUX
processErrorCode(responseCode); VqK%^
return -2; //-2 represent access is error ]6t]m2~\
} M5GY>3P$c
~A`&/U
9Z,*h-o
String sHeader; +Lm3vj_N
R^J.?>0
eyeNrk*2o
for(int i=1;;i++) 8K\'Z
{ ;wij}y-6
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ixIV=#
//Utility.log(in.readLine()); .i {>Z
sHeader=httpConnection.getHeaderFieldKey(i); FI]P<)*r
if(sHeader!=null) }>MP{67Dm
{ _:35d1[
if(sHeader.equals("Content-Length")) u0m5JD0/
{ ]2Sfkl0
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ,CJAzGBS
break; ([:]T$0 #
} zRwb"
} Lw*;tL<,
else WnD^F>
break; 01U
*_\
} _&8O~8tW
} iO!27y
catch(IOException e){e.printStackTrace ();} 5Z/yhF.{
catch(Exception e){e.printStackTrace ();} G1]"s@8(
q=|R89
T}C2e! _O
Utility.log(nFileLength); 81~Kpx
_i5mC,OffN
YiD-F7hf.*
return nFileLength; 1hl]W+9
} >;
aCf#q
Ls&+XlrX8
EE+`i%
//保存下载信息(文件指针位置) ac9qj
private void write_nPos() l0I}&,+
{ 6yY.!HRkr
try{ )h#]iGVN}
output = new DataOutputStream(new FileOutputStream(tmpFile)); vu=me?m?(
output.writeInt(nStartPos.length); ).LTts7c
for(int i=0;i<nStartPos.length;i++) KkEv#2n
{ {9L 5Q
// output.writeLong(nPos); -;^;2#](g
output.writeLong(fileSplitterFetch.nStartPos); # kyl?E
output.writeLong(fileSplitterFetch.nEndPos); %m9CdWb=w
} 2K;#Evn'j
output.close(); |'tW=
} Guh%eR'Wt
catch(IOException e){e.printStackTrace ();} cB#nsu>
catch(Exception e){e.printStackTrace ();} 9qKzS<"h
} ({4]
l[ne/O
JJ
'n0 .#E_
//读取保存的下载信息(文件指针位置) P"1 S$oc
private void read_nPos() UfO7+_2
{ ,vV]"f
try{ btH _HE
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 2edBQYWd
int nCount = input.readInt(); ZsZcQj6G,
nStartPos = new long[nCount]; $<|ocUC7
nEndPos = new long[nCount]; z>;$im
for(int i=0;i<nStartPos.length;i++) 9AHSs,.t
{ -I":Z2.fR
nStartPos = input.readLong(); C)Jn[/BD
nEndPos = input.readLong(); =oX>Ph+ P
} DdSSd@,x*
input.close(); Gs
dnf 7
} '7*=`q{
catch(IOException e){e.printStackTrace ();} e'2Y1h
catch(Exception e){e.printStackTrace ();} F2 ~%zNe
} p_{("zQ
#`;/KNp 9
""{|3XJe
private void processErrorCode(int nErrorCode) cu&,J#r%
{ ]XeO0Y
System.err.println("Error Code : " + nErrorCode); 6_gnEve
h
} PWB(5 f?
{_#y z\j
Q7gY3flg
//停止文件下载 FJNF%a)x2I
public void siteStop() J:j<"uPm
{ jN0k9O>
bStop = true; ceT&Y{T
for(int i=0;i<nStartPos.length;i++) `zpbnxOL$T
fileSplitterFetch.splitterStop(); uj|BQ`k
k~3.MU
1tMQqI`N
} k(%QIJH
} Thr*^0$C
//负责部分文件的抓取 xJZ@DR,#
**FileSplitterFetch.java %ZP+zhn}
*/ v4Ga0]VN$8
package NetFox; Bi3+)k>u7
bEV<iZDq%
^pnG0(9
import java.io.*; ]@^coj[
import java.net.*; w}R~C
%\$;(#h
up'
public class FileSplitterFetch extends Thread { LjB;;&VCn
]aryV?!6
TBrGA
E
String sURL; //File URL `Y=WMNy
long nStartPos; //File Snippet Start Position 6
sxffJt
long nEndPos; //File Snippet End Position f:B>zp;N
int nThreadID; //Thread's ID Q7X3X,
boolean bDownOver = false; //Downing is over K+=+?~
boolean bStop = false; //Stop identical
qFQ8
FileAccessI fileAccessI = null; //File Access interface \dQx+f&t
6x)$Dl
BvrB:%_:
public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 9`//^8G:=
{ :!a2]-D}
this.sURL = sURL; Mb1t:Xf^g
this.nStartPos = nStart; R"MRnr_4K
this.nEndPos = nEnd; ^u}L;`L
nThreadID = id; 1?*
fileAccessI = new FileAccessI(sName,nStartPos);//定位 SUKxkc(
} ml|W~-6l
%ek'~
h:zK(;
public void run() mI*[>#q>
{ <GHYt#GIZ+
while(nStartPos < nEndPos && !bStop) +Q=1AXe
{ Z+j\a5d?,
R" )bDy?
c gzwx
try{ /&F,V+x
URL url = new URL(sURL); N,2s?Y_!
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ")O`mXg-
httpConnection.setRequestProperty("User-Agent","NetFox"); #_Z$2L"U
String sProperty = "bytes="+nStartPos+"-"; 'TH15r@
httpConnection.setRequestProperty("RANGE",sProperty); ay "'#[
Utility.log(sProperty); P0H6mn*
y2]-&]&
D`J6h,=2l/
InputStream input = httpConnection.getInputStream(); 2aJS{[
//logResponseHead(httpConnection); [V'QrcCF
V-n&oCS+f
W^3uEm&l!)
byte[] b = new byte[1024]; pwwH<0[
int nRead; k+I}PuG
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) "&+"@<
{ Mu'8;9_6
nStartPos += fileAccessI.write(b,0,nRead); !T](Udf
//if(nThreadID == 1) |#6QThK
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); fDG0BNLY
} 5_XV%-wM
kJWN.
k}
]T;|h]
Utility.log("Thread " + nThreadID + " is over!"); WTImRXK4
bDownOver = true; cUTE$/#s
//nPos = fileAccessI.write (b,0,nRead); |t; ~:A
} L\y;LSTU
catch(Exception e){e.printStackTrace ();} /mp*>sNr6
} }%Bl>M
} [<'-yQ{l\
u%~igt@x
r5!/[_l
//打印回应的头信息 @6l%,N<fou
public void logResponseHead(HttpURLConnection con) JK.ZdY%
{ wdUBg*X8
for(int i=1;;i++) n_3O-X(
{ hKzSgYxP=t
String header=con.getHeaderFieldKey(i); *N{emwIq
if(header!=null) :1Q!$ m
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 6252N]*
Utility.log(header+" : "+con.getHeaderField(header)); 3e(ehLc4DJ
else s}N#n(
break; 5uxBK"q
} i;!H!-sM
} EvOJ~'2 Y%
SJIOI@\b
0_CN/5F
public void splitterStop() B" 3dQwQ
{ 2(/g}
bStop = true; cI=(\pC
} }#X8@
E*jP8 7g
xhRngHU\z<
} !"eIV@7
V{<xff
$z+8<?YD
/* gdkwWoN.
**FileAccess.java =+AS/Jq
*//文件访问(定位,写) RIIitgV_
package NetFox; \?je Wyo
import java.io.*; 8>7&E-
PG,_^QGCX
XP@1~$
public class FileAccessI implements Serializable{ lGVEpCS}
e@IA20
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节
6H'HxB4
RandomAccessFile oSavedFile; HeG)/W?r
long nPos; ` \+@Fwfx
lg(bDKm
3"O>&Q0c
public FileAccessI() throws IOException Q9Q|lO
{ e#E2>Bj;
this("",0); i F+vl]
} 7PkJ-JBA
D_x+:1(
v{A
KEX*
public FileAccessI(String sName,long nPos) throws IOException 3"P }n
{ ?yj6CL(,
oSavedFile = new RandomAccessFile(sName,"rw"); lIProF0
this.nPos = nPos; f-%NaTI
oSavedFile.seek(nPos); L@gWzC~?Q
} q=#}
yEG
HvVts\f
d20gf:@BM
public synchronized int write(byte[] b,int nStart,int nLen) R%'^ gFk8
{ |<GDUwC_;
int n = -1; \.3D~2cU
try{ yfm^?G|sW
oSavedFile.write(b,nStart,nLen); ~}+Hgi
n = nLen; >hr{JJe
} 3.qTLga|}
catch(IOException e) 4!LCR}K
{ kP?KXT3y
e.printStackTrace (); =X.9,$Y
} <^lRUw
}5(Ho$S(
;]pJj6J&v
return n; /IM#.v
} M-giR:,
smry2*g
L*~J%7
} )lZp9O
?'<nx{!c
x(eb5YS
/* r}jGUe}d
**SiteInfoBean.java o!!yd8~*r
*/ afb+GA!
package NetFox; ZAXN6h
)-`;1ca)s
FGh]S-A
public class SiteInfoBean { th&[Nt7
cwL1/DGDB
z~>pVs
private String sSiteURL; //Site's URL =%>oR
private String sFilePath; //Saved File's Path aM$W*-Y
private String sFileName; //Saved File's Name ~mR'Q-hi<
private int nSplitter; //Count of Splited Downloading File YR;^hs?
|H!9fZO
Z" uY}P3
public SiteInfoBean() -P]sRl3O;
{//nSplitter的缺省值为5 b&5lY p"d
//default value of nSplitter is 5 V@\%)J'g
this("","","",5); ?2g`8[">
} ,-OCc!7K
J:kmqk!
&CG*)bE
public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) xSBc-u#< G
{ -^ C=]Medl
sSiteURL= sURL; '`Wwt.A
sFilePath = sPath; gB4U*D0[e~
sFileName = sName; D2,z)O%VK
this.nSplitter = nSpiltter; j8sH#b7Z
-c}, :G"
D11F.McM
} H/"lAXfb
3dDX8M?
]$,UPR/3
public String getSSiteURL() H~E(JLcU
{ &RTX6%'KY
return sSiteURL; jH6&q~#
} "kA*Vc#
%DQhM ,c@
;-Jb1"5
public void setSSiteURL(String value) "$}vP<SM
{ :(H> 2xS,s
sSiteURL = value; %/rMg"f:
} WsDM{1c
A3ZY~s#Iv
k`x=D5s\
public String getSFilePath() .n=Z:*JqQ
{ 0{j&6I2
return sFilePath; yA3wtm/?
} Tdc3_<1
_fwb!T}$
FPJd|
public void setSFilePath(String value) `~W-Xx
{ g38&P3/
sFilePath = value; ~I(Hc.Q
} ZlojbL@|4
Z'k|u4ZC
1*
]Ev
public String getSFileName() 8x[YZ@iM-
{ OK{xuX8u
return sFileName; ILic.@st
} Nlj^Dm
MJ\ eh>v&
^xZ
e2@
public void setSFileName(String value) {bPV)RL:
{ M+!x}$&v
sFileName = value; ]0r|_)s
} <vUVP\u~$
<s@-:;9~
v{<[)cr
public int getNSplitter() dgo3'ZO
{ Eaqca{%/^
return nSplitter; Cbs5dn(Y
} -TV?E%r
,]5Ic.};p
Ap$y%6
public void setNSplitter(int nCount) -ti{6:H8
{ dz[
bm<T7
nSplitter = nCount; }17.~
} {w
<+_++
} Xq4|uuS-O
Xe+,wW3YF
)J(q49
/* |~<N -~.C
**Utility.java xE-7P|2
*/ p#KW$OQ]8
package NetFox; 7'NS9|
C_LvZ=
nmjm<Bu
public class Utility { \b*X:3g*
N:"C+a(
^ZTGJ(j7~
public Utility() n,O5".aa<
{ M|io4+sy
5HS~op2n/
nIfCF,6,
} Fd\e*ww'
+2C?9:bH
//线程睡眠 {I{:GcS
public static void sleep(int nSecond)
8%RI7Mg
{ W
>(vYU
try{ sn{A wF%
Thread.sleep(nSecond); VK3it3FI>3
} nF)uTk
catch(Exception e) v0l_w
{ <EO<x D=:
e.printStackTrace (); G"y.Z2$
} )fU(AXSP
} 9x`4RE
<JI&
{1
//日志 q\9d6u=Gm
public static void log(String sMsg) y:}sD_m0W
{ ,,=apyr#&
System.err.println(sMsg); #<CIFVH
} +1;'B4
Ey&aBYR
ZYtiMBJ
public static void log(int sMsg) EA{U!b]cU
{ +iF
1sC_
System.err.println(sMsg); ?n'OF pd
} `Xo 4q3
} '5H4z7)
(xyS7q]m
]re'LC!d
/* %(LvE}[RJ
**TestMethod.java B/eaqJ
*/ d34Y'r
package NetFox; 4Nmea-!*
&