/* E;X'.7[c
**SiteFileFetch.java .$r(":A#)
*/ S5XFYQ
package NetFox; .z9JoQ
import java.io.*; #A|MNJ%m
import java.net.*; V^Nc0r
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public class SiteFileFetch extends Thread { *AJW8tIP
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SiteInfoBean siteInfoBean = null; //文件信息Bean ~+1t17
long[] nStartPos; //开始位置 mO\6B7V!
long[] nEndPos; //结束位置 Ltu;sw
FileSplitterFetch[] fileSplitterFetch; //子线程对象 -PX {W)Aw
long nFileLength; //文件长度 {:? -)Xq
boolean bFirst = true; //是否第一次取文件 =A,i9Z&
boolean bStop = false; //停止标志 _E1:3N|
File tmpFile; //文件下载的临时信息 >Rr]e`3wG
DataOutputStream output; //输出到文件的输出流 LsLsSV
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ^y??pp<1J
public SiteFileFetch(SiteInfoBean bean) throws IOException 5ecqJ
{ uh GL1{
siteInfoBean = bean; kmuF*0Bjk
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); g.veHh|;_
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); w+JDu_9+A]
if(tmpFile.exists ()) KI#hII[Q.
{ .-o$IQsS
bFirst = false; :_vf1>[
read_nPos(); R[9[lQ'vR
} 5` Q#2
else X09&S4
{ x&7!m
nStartPos = new long[bean.getNSplitter()];
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nEndPos = new long[bean.getNSplitter()]; Bq\%]2;eo{
} ? 1_*ct=g9
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} HtXzMSGo7
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public void run() 6 s*#y[$
{ =i `o+H
//获得文件长度 uu'~[SZlL
//分割文件 n}YRE`>D
//实例FileSplitterFetch r% qgLP{v
//启动FileSplitterFetch线程 []'BrG)!
//等待子线程返回 >y2gfD
try{ O>}aK.H
if(bFirst) Y>IEB,w
{ jy6%
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nFileLength = getFileSize(); -[G+*3Y{7
if(nFileLength == -1) eM{+R^8
{ @C?RbTHy
System.err.println("File Length is not known!"); ?a(ApD\
} 4D0"Y#&G
else if(nFileLength == -2) 9CxU:;3
{ Z~v.!j0
System.err.println("File is not access!"); ;Q\Duj
} $2\OBc=
else O,hT<
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{ VBy=X\w]
for(int i=0;i<nStartPos.length;i++) V:yia^1
{ rry 33
nStartPos = (long)(i*(nFileLength/nStartPos.length)); `2}Mz9mk
} C?X^h{Tp
for(int i=0;i<nEndPos.length-1;i++) q.~_vS%
{ Kc0KCBd8];
nEndPos = nStartPos[i+1]; kWF, *@.B
} TVQ9"C
nEndPos[nEndPos.length-1] = nFileLength; J](AJkGzK
} 3g)pLW
} 7mt;qn?n
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//启动子线程 PjDYdT[
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; h>q&X4-
for(int i=0;i<nStartPos.length;i++) }c$Zlb
{ 6"z:s-V
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &h')snp:#
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), >q"mI6F
nStartPos,nEndPos,i); RlC|xj"l%
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); O*X]oX
fileSplitterFetch.start(); MoavA
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} ljQru ^(u
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), zcy!YB
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); >]s|'HTxF
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", QT&2&#Z
nEndPos = " + nFileLength); +q6/'ErN]m
// fileSplitterFetch[nPos.length-1].start(); ]haZ T\
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//等待子线程结束 8.bdN]zn
//int count = 0; lEh; MJ
//是否结束while循环 4Un (}P'
boolean breakWhile = false; S&q@M
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while(!bStop) ^cn%]X#.
{ Il `35~a
write_nPos(); .]JGCTB3
Utility.sleep(500); tDJts OL
breakWhile = true; TY"8.vd
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for(int i=0;i<nStartPos.length;i++) *?:V)!.2z
{ Uf4A9$R.G
if(!fileSplitterFetch.bDownOver) >^=upf/
{ *2P%731n5
breakWhile = false; \oA>%+]5
break; 3rBSwgRl
} !:]CKbG
} &@<Z7))
if(breakWhile) GHWi,' mr
break; ibAZ=RD
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//count++; yS'W ss
//if(count>4) K&3,J7&&
// siteStop(); ^ ~'&K e
} 8iA[w-Pv
}OL?k/w
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System.err.println("文件下载结束!"); UuPXo66F]
} L7VD ZCV
catch(Exception e){e.printStackTrace ();} XYj!nx{k,
} ])`w_y(>
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//获得文件长度 + Nn
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public long getFileSize() lJb1{\|.,
{ T+1:[bqK
int nFileLength = -1; G9 v'a&
try{ :{BD/6
URL url = new URL(siteInfoBean.getSSiteURL()); {%Cb0Zh
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Vq-W|<7C=
httpConnection.setRequestProperty("User-Agent","NetFox"); <hkSbJF
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int responseCode=httpConnection.getResponseCode(); =S+*=j A
if(responseCode>=400) Z(F['Zf
{ M~+}ss
processErrorCode(responseCode); xP/?E
return -2; //-2 represent access is error !>RDHu2n
} 71b0MHNkvv
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String sHeader; M$YU_RPl+
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for(int i=1;;i++) B!+rO~
{ h@AKfE!\~
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); )SU\s+"M
//Utility.log(in.readLine()); /~~A2.=.
sHeader=httpConnection.getHeaderFieldKey(i); fVJlA
if(sHeader!=null) 4|U$ON?x
{ O"^3,-
if(sHeader.equals("Content-Length")) R.x^
{ vG'6?%38
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader));
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break; _nwsIjsW
} u1 Z;n
} kx{LY`pY
else u:]c
break; QQI,$HId
} ;*u"hIl1/
} $|"Y|3&X
catch(IOException e){e.printStackTrace ();} ZNDn! Sj
catch(Exception e){e.printStackTrace ();} +}VaQ8ti4
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Utility.log(nFileLength); `^v=* &
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return nFileLength; Nwwn #+
} )fy-]Ky
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//保存下载信息(文件指针位置) 2x5^kN7
private void write_nPos() ,Iv eKk5W
{ ~k"r
try{ ^yLhL^Y
output = new DataOutputStream(new FileOutputStream(tmpFile)); ^/~ZP?%]
output.writeInt(nStartPos.length); dvAG}<
for(int i=0;i<nStartPos.length;i++) #Mw 6>5}<
{ _^/k
// output.writeLong(nPos); 9\'JtZO
output.writeLong(fileSplitterFetch.nStartPos); r1axC%
output.writeLong(fileSplitterFetch.nEndPos); tgyW:<iv
} fZ aTckbE
output.close(); _lG|t6y
} Y1Q240
catch(IOException e){e.printStackTrace ();} k=W~ot&
catch(Exception e){e.printStackTrace ();} )-\C{>
} ]-j.\+(*
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//读取保存的下载信息(文件指针位置) 'aWqj+Wbh
private void read_nPos() $fCKK&Wy
{ LD*XNcE
try{ /8#e < p
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); T>hrKn.!D:
int nCount = input.readInt(); aPdEEqc\l
nStartPos = new long[nCount]; {j6$'v)0
nEndPos = new long[nCount]; <78*-Ob
for(int i=0;i<nStartPos.length;i++) 5jq @ nq6
{ kzk8b?rOA
nStartPos = input.readLong(); Wsb>3J
nEndPos = input.readLong(); 25PZ&^G8%
} J`]9n>G
input.close(); ;kI)j
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} 4Ei8G]O
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catch(IOException e){e.printStackTrace ();} t[r6 jo7
catch(Exception e){e.printStackTrace ();} Sa[?B
} =X1oB,W{
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private void processErrorCode(int nErrorCode) Oq^t[X'
{ Z9G4in8
System.err.println("Error Code : " + nErrorCode); }a!ny
} .mHVJ5^:4\
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//停止文件下载 SBy{sbx4&F
public void siteStop() F
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{ )K8^}L,
bStop = true; +Wl]1
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for(int i=0;i<nStartPos.length;i++) uO>x"D5tZ:
fileSplitterFetch.splitterStop(); :7M%/#Fy
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} 9Af nMD
} ~47 0LgpO1
//负责部分文件的抓取 **$kWbS
**FileSplitterFetch.java @d5$OpL$%
*/ J&Db-
package NetFox; ?)ct@,Ek$
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import java.io.*; OMW]9E
import java.net.*; 2$o#b.
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public class FileSplitterFetch extends Thread { %+nM4)h
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String sURL; //File URL b<!' WpY-
long nStartPos; //File Snippet Start Position a@Vk(3Rx_
long nEndPos; //File Snippet End Position a ~YrQI-@
int nThreadID; //Thread's ID /!J xiGn
boolean bDownOver = false; //Downing is over sSf;j,7V
boolean bStop = false; //Stop identical yEMM@5W)8
FileAccessI fileAccessI = null; //File Access interface ^*YoNd_kpN
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException \K9.]PfbI
{ LGw-cX #
this.sURL = sURL; H<}|n1w<
this.nStartPos = nStart; )Tieef*Q~
this.nEndPos = nEnd; k.7!)jL7
nThreadID = id; q44vI
fileAccessI = new FileAccessI(sName,nStartPos);//定位 /0cm7[a ?
} u$CN$ynS
cNT !}8h^
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public void run() xQ';$&
{ 5t-d+vB
while(nStartPos < nEndPos && !bStop) 6ddRFpe
{ bo/<3gR
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try{ f[vm]1#
URL url = new URL(sURL); ]&; In,z
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); TQ:h[6v
httpConnection.setRequestProperty("User-Agent","NetFox"); 0i"2s}^+_
String sProperty = "bytes="+nStartPos+"-"; =E$bZe8
httpConnection.setRequestProperty("RANGE",sProperty); A9g/At_
Utility.log(sProperty); 33KCO
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InputStream input = httpConnection.getInputStream(); t^Lb}A#$4
//logResponseHead(httpConnection); nGwon8&]]
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byte[] b = new byte[1024]; O8A(OfX
int nRead; (,ik:j
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) +=Q:g,kP
{ \D k >dE&I
nStartPos += fileAccessI.write(b,0,nRead); HL]J=Gh
//if(nThreadID == 1) ;
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// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); |'&$VzA
} 5Ok3y|cEx
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Utility.log("Thread " + nThreadID + " is over!"); #?+[|RS|
bDownOver = true; FZ}^)u}o
//nPos = fileAccessI.write (b,0,nRead); N34-z|"q
} 4DDBf j
catch(Exception e){e.printStackTrace ();} E|>-7k")
} NV-l9
} CJh,-w{wJ"
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//打印回应的头信息 t9MCT$U
public void logResponseHead(HttpURLConnection con) l.]wBH#RS
{ T{^ P
for(int i=1;;i++) r73W.&
{ l*]hUP J
String header=con.getHeaderFieldKey(i); 5!S#}=f=
if(header!=null) gvc/Z <Y
//responseHeaders.put(header,httpConnection.getHeaderField(header)); +}1zw<
Utility.log(header+" : "+con.getHeaderField(header)); mI{Fs|9h
else JWaWOk(t=?
break; l53Q"ajG
} Ywv\9KL
} +."|Y3a
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public void splitterStop() livKiX`
{ (J.Z+s$:2
bStop = true; pZK 1G
}
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} LLT6*up$
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/* ]P#W\LZp
**FileAccess.java :!Dm,PP%
*//文件访问(定位,写) :*h1ik4t
package NetFox; t2vm&jk
import java.io.*; Y>/_A%vQU
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public class FileAccessI implements Serializable{ ;-JF b$m
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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 Wu<;QY($5
RandomAccessFile oSavedFile; @k)J
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long nPos; P7zUf
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public FileAccessI() throws IOException hu} vYA7ZH
{ :j .:t
this("",0); tY]?2u%)
} N>YSXh`W`y
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public FileAccessI(String sName,long nPos) throws IOException V sxI
{ 'I+M*Iy
oSavedFile = new RandomAccessFile(sName,"rw"); Nu?A>Q
this.nPos = nPos; %*!6R:gAp
oSavedFile.seek(nPos); n"aF#HR?0d
} gm,AH85
i ]8bj5j{
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public synchronized int write(byte[] b,int nStart,int nLen) ?wlRHVZ
{ yQ[ ;.<%v
int n = -1; 9XtO#!+48
try{ -`{W~yz
oSavedFile.write(b,nStart,nLen); *xpn-hCp<
n = nLen; _EP]|DTfr
} ~Gmt,l!b
catch(IOException e) 82ixv<B
{ o6;
e.printStackTrace (); <QFayZ$
} +>1?ck
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return n; zj]
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} 8<T~AU8'*
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} _0gdt4
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/* jUNt4
**SiteInfoBean.java ](Wa:U}Xs
*/ 2]9
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package NetFox; |n tWMm:(
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public class SiteInfoBean { GRYw_}Aa
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private String sSiteURL; //Site's URL 4v_Hh<%
private String sFilePath; //Saved File's Path ,aUbB8
private String sFileName; //Saved File's Name 0fBwy/:
private int nSplitter; //Count of Splited Downloading File SPdEO3
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public SiteInfoBean() vX6JjE!
{//nSplitter的缺省值为5 &PL=nI\)
//default value of nSplitter is 5 LFxk.-{=
this("","","",5); +%,oq]<[,
} LI3L~6A>
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) W!\%v"
{ kiN,N]-V
sSiteURL= sURL; Spx%`O<
sFilePath = sPath; r9N?z2X
sFileName = sName; v!ai_d^
this.nSplitter = nSpiltter; fU
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} 6Y\TVRR
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public String getSSiteURL() bcy
{ v'?o#_La+
return sSiteURL; U7jDm>I
} ]nebL{}5
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public void setSSiteURL(String value) -(WRhBpw
{ 'v0rnIsI?
sSiteURL = value; T }msF
} N2}Y8aR~
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public String getSFilePath() RV{%@1Pu
{ c-(dm:
return sFilePath; H<fi,"X^
} # }}6JM
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public void setSFilePath(String value) @|t]9
{ w0j'>4
sFilePath = value; A g+B*
} UcB&