/* mO]>]
**SiteFileFetch.java DyCzRkH
*/ R y#C#0
package NetFox; Hz."4nhv
import java.io.*; ZQ+DAX*MS
import java.net.*; :i4(cap&}F
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public class SiteFileFetch extends Thread { 9#@s(s
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SiteInfoBean siteInfoBean = null; //文件信息Bean R:YVmqd
long[] nStartPos; //开始位置 %),u0:go
long[] nEndPos; //结束位置 !C05;x8{
FileSplitterFetch[] fileSplitterFetch; //子线程对象 5cinI^x)f
long nFileLength; //文件长度 :;yrYAyT3
boolean bFirst = true; //是否第一次取文件 }O>1tauI
boolean bStop = false; //停止标志 j&_>_*.y
File tmpFile; //文件下载的临时信息 yDKH;o
DataOutputStream output; //输出到文件的输出流 7/51_=%kR
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) %" 7UYLX
public SiteFileFetch(SiteInfoBean bean) throws IOException }O
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{ =g!Pw]
siteInfoBean = bean; D|*w6p("z
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); L;u 5
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 5;HGS{`
if(tmpFile.exists ()) v-d"dC`
{ SFd_k9
bFirst = false; c8"Qmy
read_nPos(); GT6i9*tb#
} RuIBOo\XL7
else B K+P
{ 05T?c{ ;
nStartPos = new long[bean.getNSplitter()]; q,@#
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nEndPos = new long[bean.getNSplitter()]; h!%y,4IBR
} $ %MgIy
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public void run() 9!Q ZuZY
{ /go[}X5QR[
//获得文件长度 qe{;EH*
//分割文件 8IRKCuV
//实例FileSplitterFetch Q|h$D~
//启动FileSplitterFetch线程 Cm)TFh6
//等待子线程返回 n19A>,m
try{ 8Iw)]}T'
if(bFirst) GZu12\0nZ
{ ^AaE$G&:
nFileLength = getFileSize(); ,o%by5j"^N
if(nFileLength == -1) 3kC|y[.&
{ 1L4-;HYJm
System.err.println("File Length is not known!"); aYT!xdCI
} ~LpkA`Hn!
else if(nFileLength == -2) \DS*G7.A+&
{ g:)iEw>a
System.err.println("File is not access!"); SDO:Gma
} 'LPyh ;!f
else ZH;4e<gg
{ 6`Tx meIP
for(int i=0;i<nStartPos.length;i++) 3=sBe HL
{ k+-?b(z)$
nStartPos = (long)(i*(nFileLength/nStartPos.length)); xw}yl4WT{
} v{t
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for(int i=0;i<nEndPos.length-1;i++) hZ*vk
{ wrgB =o
nEndPos = nStartPos[i+1]; }k-8PG =
} ^rO"U[To
nEndPos[nEndPos.length-1] = nFileLength; E#:!&{O
} b.RU%Y#>\
} /Tm+&Jd
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//启动子线程 InbB2l4G
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; `i
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for(int i=0;i<nStartPos.length;i++) GJcxqgk$
{ XH~(=^/_
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 4bA^Gq
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), /7#e
nStartPos,nEndPos,i); T^|k`
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); w=;>
fileSplitterFetch.start(); :Q=y'<
} SgewAng?@o
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), z6@8IszU
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [?I<$f"
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", HP]5"ziA
nEndPos = " + nFileLength); 3{?X>6T
// fileSplitterFetch[nPos.length-1].start(); s2SV
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//等待子线程结束 ,H+Y1N4W(
//int count = 0; :FI D,
//是否结束while循环 ao9#E"BfM
boolean breakWhile = false; Eej
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while(!bStop) 7yyX8p>
{ 3W[?D8yi)
write_nPos(); ,Kj>F2{
Utility.sleep(500); a)pc+w#
breakWhile = true; Jk(V ]
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for(int i=0;i<nStartPos.length;i++) 7>gjq'0
{ mW'3yM
if(!fileSplitterFetch.bDownOver) mA$y$73=T
{ }Mt)57rU
breakWhile = false; 0)d='3S
break; G7" (,L` 5
} 7ihcjyXB
} rHw#<oV
if(breakWhile) mTtaqo_Bh
break; ;LP3
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//count++; r'{N_|:vv
//if(count>4) v; i4ZSV^A
// siteStop(); xA7~"q&u
} ;&6
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System.err.println("文件下载结束!"); K:'^f? P
} L$_%T
catch(Exception e){e.printStackTrace ();} <<?32r~
} \h=*pAf
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//获得文件长度 vx($o9
public long getFileSize() Og% Y._
{ &j1-Ouy
int nFileLength = -1; i%.NP;Qq]M
try{ R`<2DC>h9
URL url = new URL(siteInfoBean.getSSiteURL()); *1["x;A
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); kVWcf-f
httpConnection.setRequestProperty("User-Agent","NetFox"); gyAJ#N|
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int responseCode=httpConnection.getResponseCode(); ?lD)J?j
if(responseCode>=400)
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{ /Z?o%/bw:
processErrorCode(responseCode); -V{"Lzrfug
return -2; //-2 represent access is error 7d%x 7!E
} 1i$VX|r
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String sHeader; YOLzCnI4
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for(int i=1;;i++) ,V!"4T,Z
{ 7u&l]NC?y
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); \ZADY.ha
//Utility.log(in.readLine()); q&z'S
sHeader=httpConnection.getHeaderFieldKey(i); /lUfxc4
if(sHeader!=null) ;dUKFdKH}
{ nk tGO
if(sHeader.equals("Content-Length")) b)'CP Cu*
{ {DP9^hg
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); WlQCP C
break; nC,QvV
} b]z_2h~`
} rwXpB<@l@
else 03 gbcNo
break; 50Gr\
} 7uc\AhOk6
} W
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catch(IOException e){e.printStackTrace ();} 7mYcO3{5{
catch(Exception e){e.printStackTrace ();} +^(_S9CO
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Utility.log(nFileLength); 9#U]?^DJ@
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return nFileLength; ?SgFD4<~P
} WeRDaG
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//保存下载信息(文件指针位置) gNP1UH4m
private void write_nPos() Z(|$[GZP[
{ nm#23@uZ4K
try{ WRu(F54Sk
output = new DataOutputStream(new FileOutputStream(tmpFile)); bgBvzV&'8
output.writeInt(nStartPos.length); 0,RYO :`
for(int i=0;i<nStartPos.length;i++) 5@>hjXi"Y
{ r2\%/9uO
// output.writeLong(nPos); r]cq|Nv8:
output.writeLong(fileSplitterFetch.nStartPos); hOk9 y=
output.writeLong(fileSplitterFetch.nEndPos); Rw0|q
} <J+Oh\8tad
output.close(); rd0Fd+t/
} CA igV$
catch(IOException e){e.printStackTrace ();} ^/E'Rf3[A
catch(Exception e){e.printStackTrace ();} ^AU-hVj
} trrNu
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//读取保存的下载信息(文件指针位置) ,V
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private void read_nPos() THQ #zQ-
{ DDR4h"Y
try{ 3@x[M?$
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); L @T/4e./
int nCount = input.readInt(); Kt*b)
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nStartPos = new long[nCount]; :'wxm3f
nEndPos = new long[nCount]; A)9]^@,
for(int i=0;i<nStartPos.length;i++) ]pe7I
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{ wnd
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nStartPos = input.readLong(); (LTu=1
nEndPos = input.readLong(); 8m' f8.x
} x`7Le&4f
input.close(); ":+d7xR?o
} </_QldL_
catch(IOException e){e.printStackTrace ();} wX)'1H):T
catch(Exception e){e.printStackTrace ();} zNo,PERG
} V.`hk^V,
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private void processErrorCode(int nErrorCode) ! N2uJ?t
{ ^}$t(t
System.err.println("Error Code : " + nErrorCode); >4wigc
} i/_rz.c~3
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//停止文件下载 TW&s c9
public void siteStop() #\X)|p2
{ }bw^p.ci
bStop = true; -S]ercar
for(int i=0;i<nStartPos.length;i++) k0j4P^d
fileSplitterFetch.splitterStop(); A nl1+
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} hJ8&OCR }
} kXhd]7ru
//负责部分文件的抓取 Y_n/rD>
**FileSplitterFetch.java m_Hg!Lg
*/ c$[2tZ
package NetFox; ]g$ky.;
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import java.io.*; ' u<I S/w
import java.net.*; +$ djX=3
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public class FileSplitterFetch extends Thread { am/}V%^
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String sURL; //File URL prS%lg>
long nStartPos; //File Snippet Start Position e^q^AP+*
long nEndPos; //File Snippet End Position Pn4.gabE
int nThreadID; //Thread's ID z@IG"D
boolean bDownOver = false; //Downing is over 2* `kkS
boolean bStop = false; //Stop identical P51c Ehf
FileAccessI fileAccessI = null; //File Access interface FYik}wH]
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException *.w6 =}
{ a+z>pV|
this.sURL = sURL; p\_3g!G'
this.nStartPos = nStart; 2|ee` "`
this.nEndPos = nEnd; X n0HJ^"_
nThreadID = id; xp:I(
fileAccessI = new FileAccessI(sName,nStartPos);//定位 z<t2yh(DF
} V8F!o
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public void run()
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{ R $<{"b
while(nStartPos < nEndPos && !bStop) 5D/Td#T04
{ ;ja~Q .}4
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try{ rJf{YUZe
URL url = new URL(sURL); a++gwl
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); V+sZ;$
httpConnection.setRequestProperty("User-Agent","NetFox"); nO6UlY
String sProperty = "bytes="+nStartPos+"-"; 2va[= >_
httpConnection.setRequestProperty("RANGE",sProperty); p?Ux1S
Utility.log(sProperty); qYe`</
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InputStream input = httpConnection.getInputStream(); H{E(=S
//logResponseHead(httpConnection); tAjT-CXg
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byte[] b = new byte[1024]; Fi+DG?zu
int nRead; G$*=9`
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) jm&[8ApW
{ |;V-;e*
nStartPos += fileAccessI.write(b,0,nRead); ,>(X}Q
//if(nThreadID == 1) zuMz6#aCC8
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ByoI+n* U
} -[>J"l
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Utility.log("Thread " + nThreadID + " is over!"); y<IHZq`C3
bDownOver = true; L6qK3xa}
//nPos = fileAccessI.write (b,0,nRead); L1lDDS#
} E}w5.1
catch(Exception e){e.printStackTrace ();} ;gHcDnH)
} LmsPS.It
} Qj
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//打印回应的头信息 QN#Lbsd
public void logResponseHead(HttpURLConnection con) ?zsRs?rc0
{ , =*^XlO=c
for(int i=1;;i++) 7dB_q}<
{ A Ef@o+A
String header=con.getHeaderFieldKey(i); ]_s;olKNI
if(header!=null) HIj:?y
//responseHeaders.put(header,httpConnection.getHeaderField(header)); Y._ACQG3
Utility.log(header+" : "+con.getHeaderField(header)); Qe7
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else o^uh3,.
break; Ia9!ucN7DA
} h+q#|N
} (u8OTq@
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public void splitterStop() OI/]Y7D[Oq
{ IO?a.L:6U
bStop = true; g~|x^d^;|
} =<M>fJ)
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} Ub\&k[F
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/* TgRG6?#^l
**FileAccess.java DB jUHirK
*//文件访问(定位,写) Q[`2?j?
package NetFox; .Xxxz
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import java.io.*; "AWk
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public class FileAccessI implements Serializable{ a(JtGjTf&
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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 CpgaQG^
RandomAccessFile oSavedFile; Ym]rG
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long nPos; ! "08TCc<
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public FileAccessI() throws IOException Vhm^<I-d
{ sdewz(xskj
this("",0); v<0S@9~
} +tlbO?
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public FileAccessI(String sName,long nPos) throws IOException HW6Cz>WxOW
{ 8,CL>*A
oSavedFile = new RandomAccessFile(sName,"rw"); 0eCjK.
this.nPos = nPos; v!mP9c
j
oSavedFile.seek(nPos); eEmLl(Lb
} -42 U
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public synchronized int write(byte[] b,int nStart,int nLen) -x/g+T-
{ ~F~hgVS5
int n = -1; ov>`MCS,v
try{ ,b+Hy`t
oSavedFile.write(b,nStart,nLen); ws]d,]
n = nLen; BIvz55g
} Y(R],9h8
catch(IOException e) `lO/I+8
{ Y k"yup@3
e.printStackTrace (); +@rc(eOwvN
} V/"41
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return n; q 7+ |U%!9
} yg4ILL
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} 52
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/* Gg7ZSB 7
**SiteInfoBean.java =\<!kJ\yH
*/ OBP iLCq
package NetFox; twTRw:.!f
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public class SiteInfoBean { r2Q) Q
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private String sSiteURL; //Site's URL ><@& &u.
private String sFilePath; //Saved File's Path 69C
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private String sFileName; //Saved File's Name qkyYt#4E
private int nSplitter; //Count of Splited Downloading File abV,]x&.0
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public SiteInfoBean()
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{//nSplitter的缺省值为5 A5dH*< }
//default value of nSplitter is 5 gm&O-N"=U
this("","","",5); iB'g7&,L
} O{G $]FtF
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) %{P." ki
{ -| t|w:&
sSiteURL= sURL; v-Uz,3
sFilePath = sPath; bNz2Uo!0K
sFileName = sName; e}"k8 ./
this.nSplitter = nSpiltter; 1]jUiX=T
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ki
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} ]h&?^L<.
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public String getSSiteURL() ;W#/;C
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{ '#8;bU
return sSiteURL; AzBpQb*
} c6pGy%T-
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public void setSSiteURL(String value) ["?WVXCF8|
{ c\eT`.ENk
sSiteURL = value; u]Y NF[]
} +&TcTu#.`
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public String getSFilePath() t~]oJ5%
{ %^8>=
return sFilePath; 6I\mhw!pQ
} |=}v^o ZC
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public void setSFilePath(String value) \A3yM{G~+
{ 8uhB&qxB
sFilePath = value; vR\[I V?
} _b 8XF&O
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public String getSFileName() =E%<"FB
{ =R\-mov$
return sFileName; ku=XPmZ.\
} qxW2q8QHo
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public void setSFileName(String value) -`ykVHgg
{ U^X8{,8O
sFileName = value; -?<L"u
} 5Bc)QKh`l|
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public int getNSplitter() OL"So
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{ KbV%8nx!!
return nSplitter; zoBjrAyD
} >'zp
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public void setNSplitter(int nCount) 0#KB.2AP
{ D+
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nSplitter = nCount; M+TF0c
} ~d?\rj3=
} 4==LtEp
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/* 5Gsj;
**Utility.java 0Z{(,GU
*/ U!x\oLP
package NetFox; QcQ|,lA.HI
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public class Utility { MXhRnVz"W
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public Utility() way-Q7
{ X_eV<]zA+
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} \:?H_^^d
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//线程睡眠 a[8_O-
public static void sleep(int nSecond) @]h#T4z'
{ AH],>i3
try{
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Thread.sleep(nSecond); @*O(dw
} uL4@e
catch(Exception e) 4.dMNqU
{ jWW2&cBm\
e.printStackTrace (); L3~E*\cV
} .ODtduURe
} =;$&:Zjy/%
kB]|4CG{
//日志 n%<.,(.(S
public static void log(String sMsg) zj;y`ENj
{ )V}u1C-N
System.err.println(sMsg); i9M6%R1m}E
} m%E7V{t
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public static void log(int sMsg) LVLh&9
{ j{P,(-
System.err.println(sMsg); :7!/FBd
} 8LwbOR"
} 9H3#8T] ;
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/* Phgn|
**TestMethod.java ]@ [=FK^
*/ N]yk<55
package NetFox; _L!"3
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