/* ~rn82an@G
**SiteFileFetch.java L & PhABZ
*/ Q&n
package NetFox; `'
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import java.io.*; E$8GXo00v
import java.net.*; gDAA>U3|$
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public class SiteFileFetch extends Thread { NSM-p.I9
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SiteInfoBean siteInfoBean = null; //文件信息Bean o{zo-:>Jp
long[] nStartPos; //开始位置 {I(Euk>lR
long[] nEndPos; //结束位置 K6|*-Wo.
FileSplitterFetch[] fileSplitterFetch; //子线程对象 A"S})
long nFileLength; //文件长度 7CwG(c/5
boolean bFirst = true; //是否第一次取文件 M[TgNWl/[
boolean bStop = false; //停止标志 eJJvEvZ,
File tmpFile; //文件下载的临时信息 7i6-Hq
DataOutputStream output; //输出到文件的输出流 UyK|KL
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Oo=}j
public SiteFileFetch(SiteInfoBean bean) throws IOException o?hya.;h4
{ Is?0q@
siteInfoBean = bean; 6ng
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); qIO)Z
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); DSET!F;PG
if(tmpFile.exists ()) Kw-E%7gh4c
{ ^5"s3Qn
bFirst = false; W@pVP4F0xM
read_nPos(); e ~*qi&,4
} VN`2bp>5I
else SjG=H%
{ 6 D~b9e
nStartPos = new long[bean.getNSplitter()]; 4[+n;OI
nEndPos = new long[bean.getNSplitter()]; rxm!'.+
} vco:6Ab$
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} C Q3;NY=o
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public void run() SV8rZWJ
{ G H^i,88
//获得文件长度 PTL52+}/
//分割文件 X3RpJ#m"'
//实例FileSplitterFetch }bix+/]
//启动FileSplitterFetch线程 FV:{lC{h~
//等待子线程返回 HOu<,9?>Q
try{ Pme`UcE3H
if(bFirst) _=4Dh/Dv
{ yfuvU2nVH
nFileLength = getFileSize(); o.Q|%&1
if(nFileLength == -1) E: XzX Fxx
{ 1Qf5H!5vx
System.err.println("File Length is not known!"); JUwP<C[
} #2x\d
else if(nFileLength == -2) ~Bj-n6 QDE
{ \?
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System.err.println("File is not access!"); eFZ`0V0
}
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else (:E^} &A
{ Jq?ai8
for(int i=0;i<nStartPos.length;i++) |h6)p;`gc
{ qj/ 66ak
nStartPos = (long)(i*(nFileLength/nStartPos.length)); Ct"h.rD ]
} L>pP3[~DV
for(int i=0;i<nEndPos.length-1;i++) ;~/
{ o+6Y/6Xp@
nEndPos = nStartPos[i+1]; 1VJE+3
} ,n&Dg58K
nEndPos[nEndPos.length-1] = nFileLength; B.{0,bW?
} .hT^7|Jz[
} WY<ip<
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//启动子线程 ng<|lsZd
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; gEPCXf
for(int i=0;i<nStartPos.length;i++) uOm fpg O
{ c;(}Ih(#
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;k!Ej-(
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), rQ~%SUM7
nStartPos,nEndPos,i); 63F0Za}h
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); SM0=
fileSplitterFetch.start(); uQpV1o5iA
} bjD0y
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Xo]FOJ5
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); d{9jd{
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// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 6,cyi|s
nEndPos = " + nFileLength); s
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// fileSplitterFetch[nPos.length-1].start(); S{fNeK
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: @YZ6?hf
//等待子线程结束 ?WUu@Z
//int count = 0; ]lm9D@HMC
//是否结束while循环 z2 nDD6N
boolean breakWhile = false; ?i9LqHL
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while(!bStop) N2q'$o
{ ~-'nEA TE
write_nPos(); MPM_/dn-
Utility.sleep(500); UW)k]@L
breakWhile = true; |A5]hL
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for(int i=0;i<nStartPos.length;i++) ,4EE9
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{ 5TzMv3;in2
if(!fileSplitterFetch.bDownOver) kO/dZ%vj
{ Av+R~&h
breakWhile = false; ~~wz05oRG
break; Z(.p=Wg
} mxDy!:@=
} *3.
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if(breakWhile) mlIc`GSI
break; =`.9 V<
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//count++; 6VCw>x
//if(count>4) C 5)G^
// siteStop(); o5AyJuS-u$
} W}JJaZR*X
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System.err.println("文件下载结束!"); wGb{O
} +F4xCz7f
catch(Exception e){e.printStackTrace ();} 9SMM%(3, r
} u3ce\
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//获得文件长度 W99Fb+$I
public long getFileSize() c69B[Vjb
{ [Zgy,j\\
int nFileLength = -1; j3A+:KDn3n
try{ Rp9uUJ 6o
URL url = new URL(siteInfoBean.getSSiteURL()); k6G23p[9
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); KHdj#3<AR
httpConnection.setRequestProperty("User-Agent","NetFox"); 8Ck:c45v
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}7Pd\t G]
int responseCode=httpConnection.getResponseCode(); (3=. 3[
if(responseCode>=400) JWH}0+1*
{ WYI? M
processErrorCode(responseCode); NoiU5pP
return -2; //-2 represent access is error TC J\@|yw
} ,!bOzth2>K
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String sHeader; *4=Fy:R]O
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for(int i=1;;i++) jZ.+b
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{ (Z6[a{}1i
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); x$6-7<p
//Utility.log(in.readLine()); X9zTz2 Fy
sHeader=httpConnection.getHeaderFieldKey(i); >8jDW "Ua
if(sHeader!=null) CbK7="48
{ /WMG)#kw'
if(sHeader.equals("Content-Length")) F'|,(P
{ ^3AJYu
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); -/7[_,
break; Tcr&{S&o
} j+Wgjf
} %xWmzdn
else .{)b^gE
break; Z&J417buk
} yTbBYx9Bi
} ZL~}B.nqS
catch(IOException e){e.printStackTrace ();} bNIT 1'v
catch(Exception e){e.printStackTrace ();} p4(-
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Utility.log(nFileLength); }{E//o:Ta
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return nFileLength; rPr#V1}1a
} rA{h/T"
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//保存下载信息(文件指针位置) OM2|c}]ZQ
private void write_nPos() uyAhN
{ ;#f_e;
try{ j:U>V7Kn3~
output = new DataOutputStream(new FileOutputStream(tmpFile)); z,/dYvT<
output.writeInt(nStartPos.length); 6o6!Ol
for(int i=0;i<nStartPos.length;i++) h-!(O^M
{ eYR/kZ%<
// output.writeLong(nPos); C:gE
output.writeLong(fileSplitterFetch.nStartPos); 5p"*nkF
output.writeLong(fileSplitterFetch.nEndPos); 0nhsjN}v
} -YSn 3=
output.close(); z36ny o
} GpxGDN3?
catch(IOException e){e.printStackTrace ();} L{
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catch(Exception e){e.printStackTrace ();} BWw7o{d
} |%zhwDQ.
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//读取保存的下载信息(文件指针位置) xZ4\.K\f]
private void read_nPos() w)DO"Z7
{ V<ODt%
try{ o{>hOs
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DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 5)&e2V',y
int nCount = input.readInt(); vP&*(WfO)
nStartPos = new long[nCount]; X(Ef=:
nEndPos = new long[nCount]; MY1
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for(int i=0;i<nStartPos.length;i++) u'?t'I
{ &QCqaJ-
nStartPos = input.readLong(); S,Tm=} wj
nEndPos = input.readLong(); I|iI
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} 15 nc
input.close(); `Gsh<.w!7
} t*Lo;]P
catch(IOException e){e.printStackTrace ();} 9n@jK%m
catch(Exception e){e.printStackTrace ();} P`U5kNN
} Xb|hP
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private void processErrorCode(int nErrorCode) hhYo9jTHW
{ |a^ydwb
System.err.println("Error Code : " + nErrorCode); 7W}~c/ %
} ,0#OA*0B
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//停止文件下载 UP, 0`fh(y
public void siteStop() T_YN^za(q
{ azOp53zR
bStop = true; Q5 ohaxjF
for(int i=0;i<nStartPos.length;i++) wiwJD}3h'
fileSplitterFetch.splitterStop(); j|+B|
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} e(!a~{(kq%
} mHw1n=B
//负责部分文件的抓取 ^Ko0zz|R/
**FileSplitterFetch.java [C7:Yg7
*/ .fQDj{
package NetFox; @X4;fd
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import java.io.*; QKHm OVh]
import java.net.*; rZ0@GA
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public class FileSplitterFetch extends Thread { A3 j>R477A
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String sURL; //File URL _L# Tp
long nStartPos; //File Snippet Start Position Blaj07K
long nEndPos; //File Snippet End Position gdkO|x
int nThreadID; //Thread's ID hA/FK
boolean bDownOver = false; //Downing is over 5!y3=.j
boolean bStop = false; //Stop identical W>1\f0'
FileAccessI fileAccessI = null; //File Access interface LJI&j \
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException .:<c[EJ
b
{ dcXtT3,kpX
this.sURL = sURL; JziMjR
this.nStartPos = nStart; 6 t A?<S
this.nEndPos = nEnd; QW~o+N~~
nThreadID = id; p8F|]6Z
fileAccessI = new FileAccessI(sName,nStartPos);//定位 4I,@aj46
} Txp~&a03
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public void run() Zz/w>kAG*{
{ N<:Ra~Ay
while(nStartPos < nEndPos && !bStop) &;%+Hduc
{ 1b_->_9
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try{ B5tJ|3!
URL url = new URL(sURL); ,ew<T{PL
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ",~3&wx
httpConnection.setRequestProperty("User-Agent","NetFox"); EE%OD~u&9#
String sProperty = "bytes="+nStartPos+"-"; IP{Cj=
httpConnection.setRequestProperty("RANGE",sProperty); 3&2,[G04
Utility.log(sProperty); U][.ioc
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InputStream input = httpConnection.getInputStream(); *23
//logResponseHead(httpConnection); q)@.f.
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byte[] b = new byte[1024]; !)LR41>?
int nRead; zb;2xTH+
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ;q$<]X_S)}
{ 6] <?+#uQ
nStartPos += fileAccessI.write(b,0,nRead); J'B;
//if(nThreadID == 1) >6<g5ps.n
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); J^t=.-a|
} ^g~-$ t<!
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Utility.log("Thread " + nThreadID + " is over!"); 75^-93
bDownOver = true; jhg!K.A
//nPos = fileAccessI.write (b,0,nRead); mZq*o<kTA
} =8tduB
catch(Exception e){e.printStackTrace ();} W^yF5
} L`"cu.l
} OgOu$.
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//打印回应的头信息 2\s-4H|
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public void logResponseHead(HttpURLConnection con) yn%w'
{ co~TQpy^
for(int i=1;;i++) <(^-o4Cl
{ )hQ`l d7B
String header=con.getHeaderFieldKey(i); ]%mg(&p4
if(header!=null) YY]LK%-
//responseHeaders.put(header,httpConnection.getHeaderField(header)); i]1[eGF
Utility.log(header+" : "+con.getHeaderField(header)); )<3WVvB
else qrt+{5/t
break; H;$w^Tr
} 5[Q44$a{
} :uI}"Bp
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public void splitterStop() yGN<.IP75
{ c)Y I3G$
bStop = true; *$hO C%(
} xJO[pT v
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} qv,|7yw{
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/* y:v0&9L
**FileAccess.java #z5'5|3
*//文件访问(定位,写) {AcKBib
package NetFox; *qq %)7
import java.io.*; MJ7!f+!5
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public class FileAccessI implements Serializable{ >i=O =w
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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 [IHT)%>E8&
RandomAccessFile oSavedFile; !_c<j4O
long nPos; E^|b3G6T
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public FileAccessI() throws IOException X*8U%uF
{ ^pg5o)M
this("",0); Mr`u!T&sc
} 4y
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public FileAccessI(String sName,long nPos) throws IOException 52:oe1-8
{ S&R~*
oSavedFile = new RandomAccessFile(sName,"rw"); 1nvs51?H
this.nPos = nPos; 6*]Kow?
oSavedFile.seek(nPos); $?'z%a{
} ^ S%4R'
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public synchronized int write(byte[] b,int nStart,int nLen) [u-~<80
{ 6}<PBl%qe
int n = -1; %K/rPhU
try{ Bp4QHv9xqL
oSavedFile.write(b,nStart,nLen); KH@M &
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n = nLen; 0"<gg5
} n#x{~oQc
catch(IOException e) 3[8'pQ!&
{ <xc"y|7X
e.printStackTrace (); qWP1i7]=/
} Y$'fds4P
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return n; _b#9^2o
} FiIN\
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} ;
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/* gp$+Qd
**SiteInfoBean.java .$?s :t
*/ *D|6g|Hb
package NetFox; h`5au<h<
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public class SiteInfoBean { GR|Vwxs<@P
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private String sSiteURL; //Site's URL YF."D%?
private String sFilePath; //Saved File's Path K=!J=R;
private String sFileName; //Saved File's Name G\Sd!'?p
private int nSplitter; //Count of Splited Downloading File |e+I5
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public SiteInfoBean() y0rT=kU
{//nSplitter的缺省值为5 9l(e:_`_
//default value of nSplitter is 5 W]rXt,{&
this("","","",5); ef|Y2<P
} -|V@zSKr3
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) fzw6VGTf
{ )B8[w
sSiteURL= sURL; hgsE"H<V
sFilePath = sPath; N*@bJ*0
sFileName = sName; *d(wOl5[
this.nSplitter = nSpiltter; a{]1H4+bQ
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} b Z%[ON5OY
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public String getSSiteURL() )_+#yaC
{ >~XX'}
return sSiteURL; '+-R 7#
} yqCy`TK8
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public void setSSiteURL(String value) KnU "49
{ `ORDN|s6
sSiteURL = value; MR8-xO'w
} `W|2Xi=^5
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public String getSFilePath() @tp/0E?
{ V1j&>-]]9*
return sFilePath; ym1TGeFAq
} v "oO
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public void setSFilePath(String value)
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{ e2Xx7*vS
sFilePath = value; m#8KCZS
} BNaZD<<
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public String getSFileName() QmgwIz_
{ <2,@rYe/
return sFileName; 93YD\R+q
} >%d]"]
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public void setSFileName(String value) )Cx8?\/c=x
{ o@;w!'
sFileName = value; R_Eu*Quj
} zSkM8LM2
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public int getNSplitter() M: `FZ}&L
{ 9>zN 27
return nSplitter; t7-sCC0
} z*x6V0'yt
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public void setNSplitter(int nCount) )P|Ql-rE4
{ ]kc_wFT<
nSplitter = nCount; BRH:5h
} vtr:{
} vqL{~tR
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/* '^P
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**Utility.java w*bVBuXs
*/ 0<i~XN0g
package NetFox; o AQ92~b
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public class Utility { 6`+DBr
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public Utility() YQ?|Vb
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{ ;tKL/eI
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} JgK?j&!hs:
s]B^Sz=
//线程睡眠 ',O@0L]L
public static void sleep(int nSecond) wmoOp;C
{ 40@KL$B=
try{ m]u#Dm7h
Thread.sleep(nSecond); J qU%$[w
} $p9XXZ"*
catch(Exception e) A+[wH(
{ 29GejLg|
e.printStackTrace (); Y,)9{T
} r3*wH1n
} 6tnAE':
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//日志 I5 2wTl0
public static void log(String sMsg) 4P`\fz
{ sRoZvp5
System.err.println(sMsg); t+h"YiT
} VUx~Y'b
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public static void log(int sMsg) z?7s'2w&{
{ Rx'7tff%I
System.err.println(sMsg); O050Q5zy
}
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} 4wNxn
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