/* F=G{)*Ih
**SiteFileFetch.java t?;T3k[RM
*/ %Qn(rA@9
package NetFox; b(GFMk
import java.io.*; Np)3+!^1"
import java.net.*; &R+#W
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public class SiteFileFetch extends Thread { ba@ax3
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SiteInfoBean siteInfoBean = null; //文件信息Bean yh;Y,;4
long[] nStartPos; //开始位置 :ZdUx
long[] nEndPos; //结束位置 ~Pk0u{,4XQ
FileSplitterFetch[] fileSplitterFetch; //子线程对象 4yMW^:@
long nFileLength; //文件长度 EruP
boolean bFirst = true; //是否第一次取文件 ,KW;2t*IQ@
boolean bStop = false; //停止标志 Hv#q:R8
File tmpFile; //文件下载的临时信息 D)='8jV7
DataOutputStream output; //输出到文件的输出流 0Flu\w/+P
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) j{#Wn
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public SiteFileFetch(SiteInfoBean bean) throws IOException 'p)Q68;&
{ =4C}{IL
siteInfoBean = bean; "YFls#4H-
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); h?@G$%2
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); )tZ`K
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if(tmpFile.exists ()) 3bC
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{ }{7e7tW6
bFirst = false; #*q2d
read_nPos(); q5&Ci`
} OKuD"
else HgJb4Fi
{ 'TN)Lb*
nStartPos = new long[bean.getNSplitter()]; }|8*sk#[
nEndPos = new long[bean.getNSplitter()]; g=]&A
} L3y5 a?G
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} 5#:pT
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public void run() fhp)S",
{ RcY[rnI6
//获得文件长度 sB}]yw
//分割文件 $,1dQeE
//实例FileSplitterFetch :,]S}R
//启动FileSplitterFetch线程 2V#6q,2
//等待子线程返回 ayp b
try{ 5P^ U_
if(bFirst) _&{%Wc5W~F
{ gqiXmMm:9
nFileLength = getFileSize(); _pDjg%A>n
if(nFileLength == -1) ryD%i"g<
{ 0TE@xqW
System.err.println("File Length is not known!"); "|LQK0q3
} euRss#;
else if(nFileLength == -2) Z-Wfcnk
{ DMgBcP
System.err.println("File is not access!"); o 5Zyh26
} [$:,-Q @
else vd~U@-C=R
{ :F|\Ij0T
for(int i=0;i<nStartPos.length;i++) *c]KHipUIS
{ <,39_#H?F3
nStartPos = (long)(i*(nFileLength/nStartPos.length)); &W_th\%
} 4be> `d5j
for(int i=0;i<nEndPos.length-1;i++) 4!%]fg}Um
{ k0K A ~
nEndPos = nStartPos[i+1]; 744=3v
} 9{J?HFw*;
nEndPos[nEndPos.length-1] = nFileLength; w$Ux?y-L
} mX_)b>iW
} 1 tfYsg=O
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//启动子线程 s"mFt{Y
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; H:}}t]E
for(int i=0;i<nStartPos.length;i++) lJ/6-dP
{ ~Yk"Hos
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +mWjBY
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), }5S2p@W)
nStartPos,nEndPos,i); Dt}dp_
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ??xlA-E
fileSplitterFetch.start(); ?vbDB 4
} [!+D<Y
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), g{ (@uzqG
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ?iz<
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", OhWC}s
nEndPos = " + nFileLength); |$w*RI0C
// fileSplitterFetch[nPos.length-1].start(); 19y
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//等待子线程结束 pDDG_4E>
//int count = 0; !RMS+Mm?
//是否结束while循环 i&F~=Q`
boolean breakWhile = false; fGO*%)
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while(!bStop) pcpxe&S
{ kyAs'R@z
write_nPos(); b.Su@ay@(^
Utility.sleep(500); oI$V|D3 9
breakWhile = true; RK)l8c}
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for(int i=0;i<nStartPos.length;i++) wXCyj+XB*
{ {visv{R<
if(!fileSplitterFetch.bDownOver) 75 Fp[Q-
{ -N^=@Yx)
breakWhile = false; ' o=E!?
break; 22bT3
} @a;sV!S{
} >\\5"Sf
if(breakWhile) Vu|dV\N0*
break; m.146
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//count++; pGk"3.ce
//if(count>4) eiB(VOJ
// siteStop(); ]L]T>~X`
} |>JmS
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System.err.println("文件下载结束!"); 5`yPT>*#m>
} }9}w8R~E
catch(Exception e){e.printStackTrace ();} N[ Q#R~Hn<
} f(.6|mPp
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//获得文件长度 Jk~UEqr+
public long getFileSize() >Jiij
{ jaa/k@OG
int nFileLength = -1; 8l?w=)Qy
try{ =#'+"+lQ }
URL url = new URL(siteInfoBean.getSSiteURL()); GU#Q}L2
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >0M:&NMda
httpConnection.setRequestProperty("User-Agent","NetFox"); uE"2kn
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int responseCode=httpConnection.getResponseCode(); wLSjXpP8
if(responseCode>=400) }!knU3J
{ aKOf;^@
processErrorCode(responseCode); ,E]|\_]
return -2; //-2 represent access is error FLEg0/m0
} 6NSO >/E
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String sHeader; lYdQB[l
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for(int i=1;;i++) :%>oe> _"
{ yI *M[0
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); q|/!0MU"
//Utility.log(in.readLine()); !r2}59J
sHeader=httpConnection.getHeaderFieldKey(i); =_pmy>_z
if(sHeader!=null) .Wh6(LDY(
{ Q%$i@JH`m
if(sHeader.equals("Content-Length")) M3PVixli3
{ }kv) IJ
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader));
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break; +E)e1:8
} `^`9{@~
} 2}>go^#O/w
else }o{!}g9
break; .8%vd
} ?^ eJ:
} f5N<3 m=
catch(IOException e){e.printStackTrace ();} w[M5M2CF
catch(Exception e){e.printStackTrace ();} Hq79/wKj
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Utility.log(nFileLength); AV9:O{
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return nFileLength; XuA0.b%
} e ^-3etx
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//保存下载信息(文件指针位置) O} (E(v
private void write_nPos() |#!eMJ&0
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try{ \(wn@/yP'
output = new DataOutputStream(new FileOutputStream(tmpFile)); 1.uUMW
output.writeInt(nStartPos.length); KgL<}=S
for(int i=0;i<nStartPos.length;i++) +i2YX7Of
{ rR3m'[
// output.writeLong(nPos); EF0Pt
output.writeLong(fileSplitterFetch.nStartPos); `g2&{)3k
output.writeLong(fileSplitterFetch.nEndPos); 6{lG1\o
} '=-s1c@^
output.close(); b ^+Fs
} 7BVXBw
catch(IOException e){e.printStackTrace ();} G)4ZK#wz
catch(Exception e){e.printStackTrace ();} ipgN<|`?@
} B?!9W@
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//读取保存的下载信息(文件指针位置) KC#kss
private void read_nPos() J,.j_ii`!
{ WFQ*s4 R(
try{ ;,()wH
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 5XhK#X%:A
int nCount = input.readInt(); i#Ne'q;T
nStartPos = new long[nCount]; ll 6]W~[ZC
nEndPos = new long[nCount]; EaJDz`T}
for(int i=0;i<nStartPos.length;i++) ~r{\WZ.
{ J~M H_N
nStartPos = input.readLong(); |;X?">7NW
nEndPos = input.readLong(); N:"M&EUM
} s0_-1VU
input.close(); ab8oMi`z
} m*Q[lr=
catch(IOException e){e.printStackTrace ();} Q@ykQ
catch(Exception e){e.printStackTrace ();} L?AM&w-cg9
} ecM4]U
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private void processErrorCode(int nErrorCode) wpAw/-/
{ LuQ"E4;nY%
System.err.println("Error Code : " + nErrorCode); pE$|2v
} >_|Z{:z]d.
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//停止文件下载 G5y]^P
public void siteStop() 82G lbd)
{ >DPds~k
bStop = true; V:nMo2'hb
for(int i=0;i<nStartPos.length;i++) GhSL%y
fileSplitterFetch.splitterStop(); 7yc9`j}]
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} JUe K"|fA
} CwTS /G
//负责部分文件的抓取 0BbiQXU
**FileSplitterFetch.java !$%/
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*/ [q0_7
package NetFox; u|]mcZ,ZW
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import java.io.*; 7,) 67G;
import java.net.*; + 1E?He:iQ
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public class FileSplitterFetch extends Thread { t~+{Hr) #y
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String sURL; //File URL 0})7of
long nStartPos; //File Snippet Start Position xI.Orpw
long nEndPos; //File Snippet End Position 4?P%M"\Iv
int nThreadID; //Thread's ID Fi?U)T+%+
boolean bDownOver = false; //Downing is over lp37irI:
boolean bStop = false; //Stop identical JLFFh!J
FileAccessI fileAccessI = null; //File Access interface J};u25:}
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException -dc"N|.
{ lOWB^uS%
this.sURL = sURL; 9^#zxmH)
this.nStartPos = nStart; pXpLL_
this.nEndPos = nEnd; JxMyeo%gv
nThreadID = id; -z>Z0viA
fileAccessI = new FileAccessI(sName,nStartPos);//定位 _rWM]
} c5T~0 'n
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public void run() <Y}"D Yt
{ Ti9:'I
while(nStartPos < nEndPos && !bStop) ZTgAZ5_cz
{ ;*<{*6;=?
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try{ 0x3 h8fs
URL url = new URL(sURL); l1+w2rd1
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Q%X:5G?
httpConnection.setRequestProperty("User-Agent","NetFox"); kb>Vw<NtE
String sProperty = "bytes="+nStartPos+"-"; :uU]rBMo
httpConnection.setRequestProperty("RANGE",sProperty); [t"_}t =w
Utility.log(sProperty); 6,V.j>z
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InputStream input = httpConnection.getInputStream(); c1)BGy li
//logResponseHead(httpConnection); OTNZ!U/)j
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byte[] b = new byte[1024]; <manv8*6
int nRead; 3H\b N4
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) e@2E0u4
{ ;QvvU[eb
nStartPos += fileAccessI.write(b,0,nRead); laD.or
//if(nThreadID == 1) &8:iB {n
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [`Qp;_K?t
} Gct&}]3pm
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Utility.log("Thread " + nThreadID + " is over!"); 3u"J4%zg|L
bDownOver = true; \ eyQo>(
//nPos = fileAccessI.write (b,0,nRead); NXWIE4T>*^
} QvK]<HEr
catch(Exception e){e.printStackTrace ();} DS[l,x
} )=,9`+Zta
} u
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//打印回应的头信息 l b1sV
public void logResponseHead(HttpURLConnection con) [6RV'7`Abj
{ +*:x#$phx
for(int i=1;;i++) !Wdt:MUI8
{ ]X"i~$T1 S
String header=con.getHeaderFieldKey(i); L[QI 5N
if(header!=null) "PDSqYA
//responseHeaders.put(header,httpConnection.getHeaderField(header)); +n8I(l=
Utility.log(header+" : "+con.getHeaderField(header)); )l[7;ZIw$
else Vbqm]2o&
break; 1=o(sIeA
} 3' :[i2[
} Bgo"JNM
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public void splitterStop() $U"P+
{ D\_*,Fc
bStop = true; b3 %&
} Ph!KL\
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} v^lm8/}NO
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/* 5f^`4pT
**FileAccess.java fB @pwmu
*//文件访问(定位,写) 1!v >I"]
package NetFox; ]5)&36
import java.io.*; 5x1jLPl'
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public class FileAccessI implements Serializable{ L[[H\
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ~_ l:b
RandomAccessFile oSavedFile; 0or6_y6
long nPos; h?pGw1Q
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public FileAccessI() throws IOException |\r\i&|g1
{ L+0N@`nRF
this("",0); l<)JAT;P
} (m =u;L"o
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public FileAccessI(String sName,long nPos) throws IOException qU
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{ EBn:[2
oSavedFile = new RandomAccessFile(sName,"rw"); Vo9)KxR
this.nPos = nPos; abk:_
oSavedFile.seek(nPos); WG[0$j
} C7*Yg$`{
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public synchronized int write(byte[] b,int nStart,int nLen) bM3'm$34
{ 2Nt]Nj`
int n = -1; MT#[ -M\
try{ 7zkm
oSavedFile.write(b,nStart,nLen); K?9H.#(
n = nLen; $m%/veD k
} Ad N=y8T
catch(IOException e) @ :
{ C`1\$U~%
e.printStackTrace (); DkMC!Q\
} @SVEhk#
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return n; V{aIhH>P
} }y=n#%|i.
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} fO}1(%}d
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/* +VI0 oo {Z
**SiteInfoBean.java wYxFjXm
*/ >8HRnCyp/
package NetFox; ljR?* P
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* jNu?$
public class SiteInfoBean { P*^UU\x'4I
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private String sSiteURL; //Site's URL "@<g'T0
private String sFilePath; //Saved File's Path /)<7$
private String sFileName; //Saved File's Name [~r$US
private int nSplitter; //Count of Splited Downloading File nv|y@!(
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public SiteInfoBean() W;x LuKIG
{//nSplitter的缺省值为5
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//default value of nSplitter is 5 @P*P8v8:
this("","","",5); ).#D:eO[~
} %;XuA*e
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Vh-h{
{ )t 7HioQ
sSiteURL= sURL; I
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sFilePath = sPath; :95_W/l
sFileName = sName; V\lF:3C
this.nSplitter = nSpiltter; JG+o~tQC
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} o+23?A~+
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public String getSSiteURL() j3'/jk]\
{ ^Q+5M"/8
return sSiteURL; 9Yne=R/]
} {y%O_-C'r
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public void setSSiteURL(String value) Xpz-@fqKdf
{ .TU15AAc
sSiteURL = value; 8pKPbi;(2
} !LSWg:Ev+
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public String getSFilePath() e/~<\
{ wA+4:CF@
return sFilePath; VFp)`+8
} RR {9
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public void setSFilePath(String value) f*f9:xUY
{ UE](`|4H
sFilePath = value; *VAi!3Rx;
} "@bk$o=
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public String getSFileName() (
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{ 8#3cmpx4
return sFileName; b8Ad*f\
} iFT3fP'> 5
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public void setSFileName(String value) *J-jr8&
{ N^j''siB
sFileName = value; PU\q.y0R
} rMx_ <tX X
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public int getNSplitter() 667tL(
{ eNKdub
return nSplitter; ~0t'+.
} qt)mUq;>
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public void setNSplitter(int nCount) ?|F;x"
{ 3Q6#m3AWY
nSplitter = nCount; _dY}86{
} KWkT
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} ~#xRoBy3
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/* +w/o
**Utility.java Zz ?y&T
*/ x@x@0k`A2
package NetFox; :\cJvm
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public class Utility { T{Q&