/* @;4;72@O
**SiteFileFetch.java "-&K!Vfs
*/ AX v
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package NetFox; uyYV_Q0~;
import java.io.*; j.&dHtp
import java.net.*; t(3f} ?
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public class SiteFileFetch extends Thread { D>5)',D8xi
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SiteInfoBean siteInfoBean = null; //文件信息Bean vqeH<$WHvy
long[] nStartPos; //开始位置 *p(_="J,
long[] nEndPos; //结束位置 RhowhQ) G
FileSplitterFetch[] fileSplitterFetch; //子线程对象 c]M+|R5
long nFileLength; //文件长度 cpOt?XYR~
boolean bFirst = true; //是否第一次取文件 hL3up] pZ
boolean bStop = false; //停止标志 __g?xw
File tmpFile; //文件下载的临时信息 1
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DataOutputStream output; //输出到文件的输出流 )-4c@
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) D)PX |xrn
public SiteFileFetch(SiteInfoBean bean) throws IOException E*YmHJ:k
{ B=cA$620
siteInfoBean = bean; Ic0Sb7c
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); /GgID!8
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); <O+GXJ2
if(tmpFile.exists ()) a}@b2Wc*
{ <MS>7Fd2
bFirst = false; tNY;wl:wp
read_nPos(); XY'=_5t
} )h]+cGM
else (9u`(|x
{ k{+cFG\C&
nStartPos = new long[bean.getNSplitter()]; q9vND[BQ
nEndPos = new long[bean.getNSplitter()]; zx$YNjeV
} b\"F6TF:
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} 8w:ay,=
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public void run() 6,=Z4>
{ GN|"RuQ
//获得文件长度 j6l1<3j
//分割文件 .s<0}<Aq>
//实例FileSplitterFetch -- %XkO
//启动FileSplitterFetch线程 XCI
//等待子线程返回 D|5mNX%e
try{ A$wC!P|;
if(bFirst) =aVvv+T
{ 7]rIq\bM
nFileLength = getFileSize(); nFlN{_/
if(nFileLength == -1) fK7
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{ xo@1((|z
System.err.println("File Length is not known!"); hF-QbO
} KiXfR\S~C
else if(nFileLength == -2) 4 ?BQ&d
{ eX"%b(;s
System.err.println("File is not access!"); "_UnN}Uk
} j/TnKO
else 51ViJdZ
{
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for(int i=0;i<nStartPos.length;i++) oZ2:%
{ NV./p`k
nStartPos = (long)(i*(nFileLength/nStartPos.length)); (A?>U_@
} YW7w>}aW
for(int i=0;i<nEndPos.length-1;i++) ;>7~@
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{ HB )+.e
nEndPos = nStartPos[i+1]; "[
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} x;W!sO@$
nEndPos[nEndPos.length-1] = nFileLength; qXtC7uNj$
} cpk\;1&t
} . gy:Pl]w
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//启动子线程 807+|Ol[
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; I q|'#hs
for(int i=0;i<nStartPos.length;i++) ,9y6:W%5
{ b,Eq-Z;
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), zYM2`(Z
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), qq!ZYWy2
nStartPos,nEndPos,i); wp~}1]g
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 4Y?fbb<
fileSplitterFetch.start(); &~eCDlX/
} [lIX&!T"
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), )y]Dmm
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); _!2lnJ4+5
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", |4DN2P
nEndPos = " + nFileLength); N@PuC>
// fileSplitterFetch[nPos.length-1].start(); ;\th.!'rn
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//等待子线程结束 mZU
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//int count = 0; 5"h4XINZ
//是否结束while循环 6KGT?d
boolean breakWhile = false; -|'@:cIZ
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while(!bStop) W)1nc"WqY
{ H^Pq[3NQ
write_nPos(); JX'}+.\
Utility.sleep(500); i3XtrP""
breakWhile = true; 0-PT%R
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for(int i=0;i<nStartPos.length;i++) JA{kifu0+
{ [`tOhL
if(!fileSplitterFetch.bDownOver) RV@B[:
{ :#vA5kC
breakWhile = false; 1o5kP,)
break; 0VvY(j:hp
} ~d&&\EZ
} &DGqY5=
if(breakWhile) G!`%.tH
break; zji9\
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//count++; 8/2Wq~&
//if(count>4) UK
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// siteStop(); F$>#P7ph\a
} .;31G0<w2
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System.err.println("文件下载结束!"); Hd4 ~v0eS
} iM!V4Wih6
catch(Exception e){e.printStackTrace ();} 7r,GdP .
} V@+sNM
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//获得文件长度 1<h@^s ;
public long getFileSize() /7B3z}rd
{ R[ F`b
int nFileLength = -1; &K!0yR
try{ _&(Wz0
URL url = new URL(siteInfoBean.getSSiteURL()); 8r}tf3xMCM
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %^W(sB$b
httpConnection.setRequestProperty("User-Agent","NetFox"); \aSc2Ml]3n
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int responseCode=httpConnection.getResponseCode(); 0Runex[
if(responseCode>=400) atZNX1LD[/
{ h_X'O3r
processErrorCode(responseCode); ,6y.wNb :F
return -2; //-2 represent access is error FXk*zXn6
} v+EJ
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String sHeader; ?b d&Av
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for(int i=1;;i++) DB"z93Mr<K
{ ,P`:`XQ>_B
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); [)}`w;#
//Utility.log(in.readLine()); UptKN|S&V
sHeader=httpConnection.getHeaderFieldKey(i); x15&U\U
if(sHeader!=null) eOVln1a
{ c&#Q`m
if(sHeader.equals("Content-Length")) GwgY{-|`
{ pb<eg,
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Q_/UC#I8
break; Oc~<`C~
} ,X|
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} kFQo[O]
else PtPx(R3
break; cooicKS7
} aa]|
} /"!ck2d&1
catch(IOException e){e.printStackTrace ();} WO69Wo\C
catch(Exception e){e.printStackTrace ();} M$v\7vBgO!
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Utility.log(nFileLength); n%2c<@p#
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return nFileLength; t`6~ud>
} `j2|aX
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//保存下载信息(文件指针位置) M;g"rpM
private void write_nPos() )fuAdG
{ }uD*\.
try{ ZDK+>^A)
output = new DataOutputStream(new FileOutputStream(tmpFile)); FKtCUq,:
output.writeInt(nStartPos.length); CW@EQ3y0
for(int i=0;i<nStartPos.length;i++) ;[C_ho
{ yqb$,$
// output.writeLong(nPos); c]ll89`||
output.writeLong(fileSplitterFetch.nStartPos); ) WkN34Q
output.writeLong(fileSplitterFetch.nEndPos); .$&vSOgd(
} n Fwg pT
output.close(); x'i~o'
} aE]RVyG@L
catch(IOException e){e.printStackTrace ();} t:'^pYN:g
catch(Exception e){e.printStackTrace ();} 'eQ*?a43
} ;x)f;!e+
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//读取保存的下载信息(文件指针位置) )x,-O#"A
private void read_nPos() 5p.#nc!;y
{ lA,[&
try{ O2Y1D`&5
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); xs)SKG*
int nCount = input.readInt(); O8*yho
nStartPos = new long[nCount]; 1OFrxSg
nEndPos = new long[nCount]; z4[8*}
for(int i=0;i<nStartPos.length;i++) /GP:W6:6z6
{ LqQ&4I
nStartPos = input.readLong(); V'N]u(^
nEndPos = input.readLong(); \ 0F
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} 3 lKBwjW
input.close(); CTB
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} 30cb+)h(
catch(IOException e){e.printStackTrace ();} "f!H[F1~
catch(Exception e){e.printStackTrace ();} zM%2h:*+{
} EzU=q
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private void processErrorCode(int nErrorCode) 78'3&,+si
{ N,ihQB5
System.err.println("Error Code : " + nErrorCode); Xj6?,J
} s=&x%0f%
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//停止文件下载 )k 6z
public void siteStop() r [n vgzv@
{ O3L:v{Kn
bStop = true; ];{CNDAL2
for(int i=0;i<nStartPos.length;i++) K{G\=yJ((
fileSplitterFetch.splitterStop(); "V4ru&a
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} F$,i_7Z&6
} ibuoq X`
//负责部分文件的抓取 |HTTTz9R.
**FileSplitterFetch.java O=}jg0k
*/ C/z 0/mk
package NetFox; KupQtT<
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import java.io.*; =.q8*7UY
import java.net.*; Hc-68]T
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public class FileSplitterFetch extends Thread { 8Dc'"3+6
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String sURL; //File URL s+]6X*)
long nStartPos; //File Snippet Start Position HqKD]1
long nEndPos; //File Snippet End Position tc<HA7vpt~
int nThreadID; //Thread's ID )cRP6 =
boolean bDownOver = false; //Downing is over 1NU@k6UHl
boolean bStop = false; //Stop identical }ILg_>uq[
FileAccessI fileAccessI = null; //File Access interface $s9YU"
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException R|t.JoP9
{ #7,;/rtO7
this.sURL = sURL; 8CGjI?j
this.nStartPos = nStart; |D[4G6&
this.nEndPos = nEnd; iJEKLv
nThreadID = id; MryY<s
fileAccessI = new FileAccessI(sName,nStartPos);//定位 5tu 4uYp;
} Ov~>* [
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public void run() %1PNP<3r0
{ :J;*]o:
while(nStartPos < nEndPos && !bStop) {$qLMx';
{ +m1y#|08
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try{ N:e5=;6s
URL url = new URL(sURL); 5|bc*iqU
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Q$=X
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httpConnection.setRequestProperty("User-Agent","NetFox"); H1kxY]_/
String sProperty = "bytes="+nStartPos+"-"; gK>aR ^*
httpConnection.setRequestProperty("RANGE",sProperty);
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Utility.log(sProperty); L3^+`e
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InputStream input = httpConnection.getInputStream(); ~_hn{Ous
//logResponseHead(httpConnection); (GDW9:
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byte[] b = new byte[1024]; \6c8Lqa
int nRead; i.6+CA
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ~{gV`nm=J
{ ^Y+P(o$HM
nStartPos += fileAccessI.write(b,0,nRead); vvcA-k?
//if(nThreadID == 1) zQyt 1&!
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); T!Eyq,]
} "~ eF%}.
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Utility.log("Thread " + nThreadID + " is over!"); nkTu/)or
bDownOver = true; &!
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//nPos = fileAccessI.write (b,0,nRead); dhmZ3 ~cW>
} 5AO'Ihp L
catch(Exception e){e.printStackTrace ();} n0%]dKCB
} pv ;ZR
} ^+'\
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_ -C{:rV
//打印回应的头信息 Jde@Th
public void logResponseHead(HttpURLConnection con) K&>+<bJ_
{ jxNnrIA
for(int i=1;;i++) Avn)%9
{ <vUhJgN2/
String header=con.getHeaderFieldKey(i); q[MZSg
if(header!=null) tw%z!u[a
//responseHeaders.put(header,httpConnection.getHeaderField(header)); tg'2v/
Utility.log(header+" : "+con.getHeaderField(header)); `78)|a*R.
else )xj!7:n)
break;
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} UKBaGX:v
} &5o ln@YL
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public void splitterStop() C p.qL
{ pLea 4
bStop = true; wwD?i.3
} P\2UIAPa\b
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} {m7>9{`
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/* 6y+}=)J
**FileAccess.java EQ>] ~
*//文件访问(定位,写) eY#_!{*Wn
package NetFox;
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import java.io.*; ( ,!G$~Sy
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public class FileAccessI implements Serializable{ C)xM>M_CB
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Nr#" 5<W
RandomAccessFile oSavedFile; 2E*h,Mo
long nPos; o+I'nFtnI
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public FileAccessI() throws IOException ~s4o1^6L
{ J2d3&6
this("",0); T.x"a$AU
} W2W4w
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public FileAccessI(String sName,long nPos) throws IOException -J\R}9 lIm
{ qVMBZ\`Qm
oSavedFile = new RandomAccessFile(sName,"rw"); 5
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this.nPos = nPos; L>.*^]
oSavedFile.seek(nPos); *Y/}EX!F
} 7t~12m8x
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public synchronized int write(byte[] b,int nStart,int nLen) VYC$Q;Z
{ @^UnrKSd
int n = -1; l11+sqg
try{ $>=?'wr
oSavedFile.write(b,nStart,nLen); CZ4Nw]dtR
n = nLen; fA{t\
} .tH[A[/1 a
catch(IOException e) .\:{6_
{ B(B77SOb
e.printStackTrace (); .qGfLvx%
} gOL-b9W
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return n; %MH!L2|
} KKJ)BG?qZ
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} 5KI lU78
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/* *j"u~ NF
**SiteInfoBean.java FQW{c3%qZ
*/ *p Q'w
package NetFox; Vnvfu!>(
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public class SiteInfoBean { 1Q>D^yPI[
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private String sSiteURL; //Site's URL %|\Af>o4d
private String sFilePath; //Saved File's Path |p\vH#6y+
private String sFileName; //Saved File's Name O\&-3#e
private int nSplitter; //Count of Splited Downloading File ' zz^!@
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public SiteInfoBean() lJIcU
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{//nSplitter的缺省值为5 !Pf6UNN'
//default value of nSplitter is 5 `y0u(m5
this("","","",5); z8-dntkf
} NL}Q3Vv1.
}ofx?s}
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Gw1Rp
{ N&jHU+{OU
sSiteURL= sURL; :Cdqj0O3u
sFilePath = sPath; J*FUJT
sFileName = sName; EPu-oE=HW4
this.nSplitter = nSpiltter; y 13Y,cz~B
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} K2
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public String getSSiteURL() CD:$22*]
{ v{c,>]@
return sSiteURL; +]dh`8*8>1
} H&_drxUq;L
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public void setSSiteURL(String value) ]21`x
{ x*7Q
sSiteURL = value; @/f'i9?oM`
} s=[T,:Z
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public String getSFilePath() U"L7G$
{ MR3\7D+9y
return sFilePath; *-\qO.4\
} 3$f+3/l
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public void setSFilePath(String value) nBkzNb{"AZ
{ rm?C_
sFilePath = value; T:=ST3#m
} =;A>1g$
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public String getSFileName() 6QM$aLLP?
{ K'\Jnn
return sFileName; R>T9 H0
} CAa&,ZR
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