/* F@ Swe
**SiteFileFetch.java bi[IqU!9
*/ c(#;_Ve2P
package NetFox; MUnEuhXTr
import java.io.*; 4_A0rveP
import java.net.*; A@hppaP!
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public class SiteFileFetch extends Thread { 3 ZEB
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SiteInfoBean siteInfoBean = null; //文件信息Bean 9h&R]yz;
long[] nStartPos; //开始位置 aJ Z"D8C
long[] nEndPos; //结束位置 ~6YMD
FileSplitterFetch[] fileSplitterFetch; //子线程对象 -m
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long nFileLength; //文件长度 Lk\P7w{
boolean bFirst = true; //是否第一次取文件 u .f= te
boolean bStop = false; //停止标志 21hv%CF\9
File tmpFile; //文件下载的临时信息 zk-.u}RBFG
DataOutputStream output; //输出到文件的输出流 w| `h[/,
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) %yBB?cp+_
public SiteFileFetch(SiteInfoBean bean) throws IOException ,#M Cn
{ I9h ?;(
siteInfoBean = bean; 86]p#n_>Fv
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); hj'(*ND7z
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); CI353-`
if(tmpFile.exists ()) MZ+^-@X
{ )e5 @
bFirst = false; wLK07e(
read_nPos(); (e(:P~Ry
} <-D/O$q
else ^8.]d~j
{ YIw1
nStartPos = new long[bean.getNSplitter()]; ~ab:/!Z
nEndPos = new long[bean.getNSplitter()]; T,aW8|
} $9Hcdbdm
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} okbQ<{9
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public void run() 3EJt%}V$k
{ :VTTh
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//获得文件长度 ns6(cJ^a
//分割文件 xJ#d1[kzo
//实例FileSplitterFetch J8mdoVt
//启动FileSplitterFetch线程 SkmT`*v@
//等待子线程返回 :POj6j/
try{ ^0/j0]O
if(bFirst) ;L']e"G
{ CrwwU7qKL
nFileLength = getFileSize(); 5[c^TJ3
if(nFileLength == -1) feQ **wI
{ +v=C@2T
System.err.println("File Length is not known!"); |PC*=ykT3
} j~!X;PV3
else if(nFileLength == -2) ~l)-wNqR4r
{ w.[ "p9tc
System.err.println("File is not access!"); ;q*e=[_DF
} M5 <@~V/[
else ^]TVo\,N
{ c%MW\qx
for(int i=0;i<nStartPos.length;i++) l1f\=G?tmU
{ %i5M77#Z
nStartPos = (long)(i*(nFileLength/nStartPos.length)); \otWd
} N;\'N
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for(int i=0;i<nEndPos.length-1;i++) AvfNwE
{ y&V@^"`
nEndPos = nStartPos[i+1]; 9I4K}R
} rk #sy$
nEndPos[nEndPos.length-1] = nFileLength; ax (c#
} V#iPj'*
} V,%=AR5
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//启动子线程 thI
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fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Evedc*z~P
for(int i=0;i<nStartPos.length;i++) 97}OL`y
{ ZjF 4v
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), oz,e/v8~
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), C#Na&m
nStartPos,nEndPos,i); ; #&yn=^
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); XT4{Pe7{[P
fileSplitterFetch.start(); (L/_^!ZX
} O6LS(5j2
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), "hsb8-
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); <i&_ooX
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ~vyf4TF<#
nEndPos = " + nFileLength); [5SD_dN
// fileSplitterFetch[nPos.length-1].start(); >Z'NXha
/ G7vwC
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//等待子线程结束 d>mo~
//int count = 0; * -8&[D0
//是否结束while循环 Sy0$z39
boolean breakWhile = false; 9po3m]|zy
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while(!bStop) ui/a|Q
{ LGw$v[wb
write_nPos(); $7^o#2
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Utility.sleep(500); pe1R(|H
breakWhile = true; :g Wu9Y|{
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for(int i=0;i<nStartPos.length;i++) ZZzMO6US0
{ pC@{DW;V6R
if(!fileSplitterFetch.bDownOver) {#@W)4)cA
{ "i[@P)
breakWhile = false; \D*KGd]M0
break; Na]:_K5Dp
} k@k&}N0{
} v0H@Eg_
if(breakWhile) SC)g^E#
break; 6[ j.@[t
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//count++; 9
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//if(count>4) x"~8*V'0
// siteStop(); .uMn0PE
} o <pf#tifv
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System.err.println("文件下载结束!"); l)1r+@)\
} /rnu<Q#iH
catch(Exception e){e.printStackTrace ();} E/|To
} l3ko?k
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//获得文件长度 q_MG?re
public long getFileSize() __G?0*3 G
{ \o*5
int nFileLength = -1; )<h*eS{
try{ R6;=n"Ueb
URL url = new URL(siteInfoBean.getSSiteURL()); P2#XKG
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); K8GP@yD]M
httpConnection.setRequestProperty("User-Agent","NetFox"); P-y jN
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int responseCode=httpConnection.getResponseCode(); `ZyI!"
if(responseCode>=400) 4;yKOQD|
{ keL&b/@
processErrorCode(responseCode); l5!|I:/*;
return -2; //-2 represent access is error eD?tLj
} Q ayPo]O
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String sHeader; 'vbsv T
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for(int i=1;;i++) {?}E^5Z*g
{ =Y|VgV
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); r1 !@hT
//Utility.log(in.readLine()); `{3<{wgw
sHeader=httpConnection.getHeaderFieldKey(i); L*xhGoC=
if(sHeader!=null) ?PeJlpYzV
{ zPn+V7F
if(sHeader.equals("Content-Length")) "O3tq=Q
{ ls\WXCH
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); {Aw#?#GPW
break; iT3BF"ZqBO
} fI ?>+I5
} C~,a!qY
else EE&K0<?T|:
break; 1"MhGNynB>
} riY~%9iV'
} %*A0# F
catch(IOException e){e.printStackTrace ();} .sha&
catch(Exception e){e.printStackTrace ();} Y!-M_v /
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Utility.log(nFileLength); PUT=C1,OFR
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return nFileLength; _S<3\%(0
} #+Ir>GU
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//保存下载信息(文件指针位置) x kx^%3dV
private void write_nPos() ey7 f9
{ !;q&NHco
try{ _{I3i:f9X8
output = new DataOutputStream(new FileOutputStream(tmpFile)); q9KHmhUD
output.writeInt(nStartPos.length); I| w"/"U
for(int i=0;i<nStartPos.length;i++) x
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{ eI$oLl@
// output.writeLong(nPos); _mqL8ho
output.writeLong(fileSplitterFetch.nStartPos); )B"jF>9)[
output.writeLong(fileSplitterFetch.nEndPos); ]sf7{lVT
} cLpYW7vZ[
output.close(); ~7*.6YnI
} |mxDjgq
catch(IOException e){e.printStackTrace ();} !JHL\M>A5
catch(Exception e){e.printStackTrace ();} XKj|f`
} ]#)()6)2v
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k+# %DK
//读取保存的下载信息(文件指针位置)
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private void read_nPos() JFcLv=U
{ >*~L28Fyn
try{ `uv2H$
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); .F98G/s
int nCount = input.readInt(); TV)h`\|Z*
nStartPos = new long[nCount]; M'7f O3&|
nEndPos = new long[nCount]; M8MRoA6F
for(int i=0;i<nStartPos.length;i++) u@W|gLT1
{ hO\<%0F
nStartPos = input.readLong(); .F4>p=r
nEndPos = input.readLong(); GFj{K
} =)0,#9k U]
input.close(); OcR$zlgs[v
} %<\vGqsM
catch(IOException e){e.printStackTrace ();} mitHT :%r2
catch(Exception e){e.printStackTrace ();} 8g@<d^8@
} <GS^
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private void processErrorCode(int nErrorCode) bkOv2tZ
{ Q3kdlxXR
System.err.println("Error Code : " + nErrorCode); -]0OKE&
} =Gpylj7?~
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//停止文件下载 [<Mx2<8f
public void siteStop() 2%DSUv:H%
{ ($q-_m
bStop = true; "Gsc;X'id
for(int i=0;i<nStartPos.length;i++) *>Ns_su7W
fileSplitterFetch.splitterStop(); TH%Qhv\]
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} q }i]'7
} F|SXn\
//负责部分文件的抓取 U$O\f18
**FileSplitterFetch.java m ifxiV
*/ wT6"U$cV
package NetFox; pj\u9
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import java.io.*; CuaVb1r
import java.net.*; = 6j&4p
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public class FileSplitterFetch extends Thread { SL Ws*aq
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String sURL; //File URL ih58<Up5
long nStartPos; //File Snippet Start Position {c6=<Kv
long nEndPos; //File Snippet End Position `!obGMTQ<
int nThreadID; //Thread's ID }s7$7
boolean bDownOver = false; //Downing is over hr#M-K
boolean bStop = false; //Stop identical {BP{C=p
FileAccessI fileAccessI = null; //File Access interface Tm~" IB*
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException &C`Gg<
{ a!zz6/q[
this.sURL = sURL; D#_3^Kiawj
this.nStartPos = nStart; :NhO2L
this.nEndPos = nEnd; 4X!/hI=jq
nThreadID = id; 2Z+Wu3#
fileAccessI = new FileAccessI(sName,nStartPos);//定位 xs{3pkTYD
} ]N~2 .h
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public void run() .T}Wdng
{ QVv#fy1"6
while(nStartPos < nEndPos && !bStop) Q1U\D
{ h=W:^@G
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try{ ] ]u
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URL url = new URL(sURL); 1auIR/=-
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); KI.q@zO6|
httpConnection.setRequestProperty("User-Agent","NetFox"); 6/f7<
String sProperty = "bytes="+nStartPos+"-"; k9<;woOBO
httpConnection.setRequestProperty("RANGE",sProperty); qLO4#CKCL6
Utility.log(sProperty); +jAGGv^)
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InputStream input = httpConnection.getInputStream(); S(k3 `;K
//logResponseHead(httpConnection); .yMEIUm
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byte[] b = new byte[1024]; piJu+tUy
int nRead; ~Q Oe##
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) F|IAiE
{ @D]5c ivm_
nStartPos += fileAccessI.write(b,0,nRead); ;0Q4<F
//if(nThreadID == 1) 1jx:;j
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Q$a{\*[:+
} +! ]zA4x
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Utility.log("Thread " + nThreadID + " is over!"); evya7^,F
bDownOver = true; 9)h"-H;5:
//nPos = fileAccessI.write (b,0,nRead); )cX*I gO
} 9>=;FY
catch(Exception e){e.printStackTrace ();} 9"N~yKa`"K
} B~'vCuE
} >f|||H}Snw
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//打印回应的头信息 kI,yU}<Fq
public void logResponseHead(HttpURLConnection con) g!FuY/%+
{ [T|aw1SoN
for(int i=1;;i++) S){)Z
{ rF3wx.
String header=con.getHeaderFieldKey(i); !eGC6o}f
if(header!=null) Bj+S"yS
//responseHeaders.put(header,httpConnection.getHeaderField(header)); #QS`_TlKk
Utility.log(header+" : "+con.getHeaderField(header)); Q1T$k$n
else IDad9 Bx
break; ]vz%iv_
} fJ=0HNmX
} sSr&:BOsi
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public void splitterStop() `vU%*g&R
{ V )3KS-
bStop = true; ^\hG"5#
} 272q1~&
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} w0[6t#$F
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/* ZAW^/bo<
**FileAccess.java 9#23FK
*//文件访问(定位,写) Yc`o5Q\>
package NetFox; dhC$W!N7!
import java.io.*; 0XOp3
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public class FileAccessI implements Serializable{ raW>xOivR
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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 k
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RandomAccessFile oSavedFile; $CRm3#+
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long nPos; kPKB|kP\
! :Y:pu0
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public FileAccessI() throws IOException 7dN*lks
{ S:u:z=:r
this("",0); 'I`&Yo~c9
} `oAW7q)~
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public FileAccessI(String sName,long nPos) throws IOException 'g">LQ~a+
{ ):P?
oSavedFile = new RandomAccessFile(sName,"rw"); # ncRb
this.nPos = nPos; _H9 MwJ
oSavedFile.seek(nPos); d|jNf</`
} #"}JdBn
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public synchronized int write(byte[] b,int nStart,int nLen) C/_ZUF(V
{ Tg7an&#
int n = -1; fPU`/6
try{ k}S :RK
oSavedFile.write(b,nStart,nLen); goLL;AL
n = nLen; 3_C|z,\:
} pXtl
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catch(IOException e) ^Xz@`_I
{ ?#Ge.D~u
e.printStackTrace (); x" 7H5<
} |a8iZ9/D6
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return n; dR
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} bes<qy
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} jY&k
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/* QER?i;-wb
**SiteInfoBean.java H
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*/ at @G/?
package NetFox; NxfOF
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public class SiteInfoBean { wDw[RW3
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private String sSiteURL; //Site's URL aasoW\UG
private String sFilePath; //Saved File's Path 5b5x!do
private String sFileName; //Saved File's Name |Yx~;q:
private int nSplitter; //Count of Splited Downloading File -Mip,EO
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public SiteInfoBean() CZ8KEBl
{//nSplitter的缺省值为5 rDl*d`He!
//default value of nSplitter is 5 qjwxhabc
this("","","",5); /{Is0+)
} ag;Q F
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) W'els)WJ|x
{ hC:n5]K
sSiteURL= sURL; JR'
sFilePath = sPath; q~
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sFileName = sName; Mc@e0
this.nSplitter = nSpiltter; 8."]//V
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} AW%50V
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public String getSSiteURL() ^9m\=5d
{ -N6f1>}pE
return sSiteURL; ;
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} %) /s; Q,
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public void setSSiteURL(String value) 5]~'_V
{ c>,KZ!
sSiteURL = value; <5d~P/,
} GC<l#3+
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public String getSFilePath() 9Q.rMs>qj
{ S
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return sFilePath; dW)B1iUo!
} 2$9odD<r
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public void setSFilePath(String value) %}[i'rT>
{ A mvEf
sFilePath = value; }\hVy(\c
} x`U^OLV
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