/* ~e
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**SiteFileFetch.java K[~Wj8W0
*/ g#9w5Q
package NetFox; pqMvYF
import java.io.*; nI2}E
import java.net.*; 0WF(Ga/o
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public class SiteFileFetch extends Thread { n\,TW&3
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SiteInfoBean siteInfoBean = null; //文件信息Bean *VHBTO9
long[] nStartPos; //开始位置 4TwU0N+>
long[] nEndPos; //结束位置 rJ\A)O+Mq(
FileSplitterFetch[] fileSplitterFetch; //子线程对象 "*+epC|ks
long nFileLength; //文件长度 *9j9=N?
boolean bFirst = true; //是否第一次取文件 *uA?}XEfi
boolean bStop = false; //停止标志 <e/O"6='Z
File tmpFile; //文件下载的临时信息 ?=r!b{9
DataOutputStream output; //输出到文件的输出流 GVn9=[r
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 1yX&iO^d
public SiteFileFetch(SiteInfoBean bean) throws IOException ;4 ?%k )
{ 7w>"M
siteInfoBean = bean; ,yV
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); oYJ&BPuA'
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); \lKQDct. -
if(tmpFile.exists ()) LaN4%[;X1-
{ ]3d&S5zU
bFirst = false; a Q`a>&R0
read_nPos(); mNb+V /*x3
} <i]%T~\Af)
else m+OR W"o
{ $XyGCn
nStartPos = new long[bean.getNSplitter()]; }Lb];hww1
nEndPos = new long[bean.getNSplitter()]; Wv=L_E_
} Z]w_2- -
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} ;Jx ^
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public void run() ni~45WX3
{ oC4rL\d{
//获得文件长度 (/ k, q
//分割文件 (]7@0d88
//实例FileSplitterFetch e% 5!
//启动FileSplitterFetch线程 B2845~\.
//等待子线程返回 zh/+1
try{ Bj@&c>
if(bFirst) }Ecm
{ ARQ1H0_B
nFileLength = getFileSize(); 8$G$Rdn
if(nFileLength == -1) i3e|j(Gs4
{ *,'"\n
System.err.println("File Length is not known!"); t8?+yG;
} []dRDe;#
else if(nFileLength == -2) QtN 0|q{af
{ 3>L1}zyM]
System.err.println("File is not access!"); L {B#x@9tQ
} L"}@>&6
else lPFMNRt~8
{ _I$]L8hC
for(int i=0;i<nStartPos.length;i++) <7PtC,74
{ A)`M*(~
nStartPos = (long)(i*(nFileLength/nStartPos.length)); ][?GJ"O+U
} Z<&:
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for(int i=0;i<nEndPos.length-1;i++) {< kl)}
{ .-WCB
nEndPos = nStartPos[i+1]; 8V}c(2m
} |ZZ3Qr+%S
nEndPos[nEndPos.length-1] = nFileLength; &Q&$J )0
} )9<)mV*EB(
} "UAW
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//启动子线程 !0fK*qIL
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; \[D"W{9l
for(int i=0;i<nStartPos.length;i++) Q45rP4mQ
{ 6b]vHT|p
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), pn
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), pAa{,,Qc
nStartPos,nEndPos,i); \{UiGCK
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); l;|1C[V
fileSplitterFetch.start(); 0j_!)B
} {?m',sG;&
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), w^ DAu1
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); :$}67b)MO
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", _FVIN;!
nEndPos = " + nFileLength); *{-XN
// fileSplitterFetch[nPos.length-1].start(); ~V./*CQ\c
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a\%g_Q){
//等待子线程结束 0e}LZ,9e
//int count = 0; kXOlZC
//是否结束while循环 SQz>e
boolean breakWhile = false; ]I}'
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while(!bStop) 5,mb]v0k
{ (TY^
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write_nPos(); ](a<b@p
Utility.sleep(500); BRW
breakWhile = true; wiFckF/
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for(int i=0;i<nStartPos.length;i++) `[:f;2(@
{
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if(!fileSplitterFetch.bDownOver) Pd@?(WQ
{ ml3]CcKn
breakWhile = false; EL+}ab2S
break; M@gm.)d
} z{%G
} c3Mql+@
if(breakWhile) s\KV\5\o
break; -bs~{
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//count++; y\@XW*_?
//if(count>4) 0<P
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// siteStop(); R"82=">v
} @,s[l1P
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System.err.println("文件下载结束!"); 2} T"|56
} r?Z8_5Y
catch(Exception e){e.printStackTrace ();} &]ImO
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} IRcZyry
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//获得文件长度 g@S"!9[;U
public long getFileSize() G_X'd
{ X"[c[YT!%[
int nFileLength = -1; Y=Bk;%yT=
try{ HZM&QZHx)`
URL url = new URL(siteInfoBean.getSSiteURL()); 2>UyA.m0
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,rG$JCS'KQ
httpConnection.setRequestProperty("User-Agent","NetFox"); (A?e}M^}
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int responseCode=httpConnection.getResponseCode(); jT'1k[vJj
if(responseCode>=400) hDfsqSK0 /
{ j[c|np4k\
processErrorCode(responseCode); SFh6'v'1N@
return -2; //-2 represent access is error @y}1%{,%
} =m1B1St 2
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String sHeader; CM~)\prks
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for(int i=1;;i++) d7l0;yR&+
{ r0hu?3u1?
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); F7L+bv
//Utility.log(in.readLine()); b^FB[tZ\x
sHeader=httpConnection.getHeaderFieldKey(i); :~g=n&x
if(sHeader!=null) 0h$23.
{ mNs&*h}
if(sHeader.equals("Content-Length")) 7zy6`OP
{ uZg Kex;c
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); =cg0o_q8
break; 1'Kn:I
} A<AZs~f
} Cg-khRgLS
else friNo^v&
break; Rsqb<+7
} 4WDh8U
} nV
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catch(IOException e){e.printStackTrace ();} 3C2L _ K3
catch(Exception e){e.printStackTrace ();} RV7l=G9tq
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Utility.log(nFileLength); ] S]F&B
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return nFileLength; ^P\(IDJCo
} l *.#g
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//保存下载信息(文件指针位置) XkOsnI8n
private void write_nPos() 27G6C`}
{ wjQu3 ,Cj
try{ hH|3s-o
output = new DataOutputStream(new FileOutputStream(tmpFile)); $_% a=0
output.writeInt(nStartPos.length); ,;hIyT
for(int i=0;i<nStartPos.length;i++) 6:#zlKYJ
{ i4&"-ujrm
// output.writeLong(nPos); G2zfdgW${/
output.writeLong(fileSplitterFetch.nStartPos); @9-z8PyF
output.writeLong(fileSplitterFetch.nEndPos); !A, ]
} +A3@{2
output.close(); ON\_9\kv
} 'eZUNX
catch(IOException e){e.printStackTrace ();} AWc7TW
catch(Exception e){e.printStackTrace ();} YrL:!\p.
} ,QdUfM
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//读取保存的下载信息(文件指针位置) j"9bt GX
private void read_nPos() nYLq%7}k
{ u4, p.mZtb
try{ kW3V"twx
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); #\_N-bVu
int nCount = input.readInt(); a4Fe MCvV9
nStartPos = new long[nCount]; S{7A3
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nEndPos = new long[nCount]; k$j>_U? P
for(int i=0;i<nStartPos.length;i++) 6DD"Asi+
{ nM>oG'm[n
nStartPos = input.readLong(); sjvlnnO
nEndPos = input.readLong(); ]EC zb/
} @~qlSU&
input.close(); n&jfJgD&g
} *?VbN}g2
catch(IOException e){e.printStackTrace ();} q
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catch(Exception e){e.printStackTrace ();} L
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} z}&?^YU*)`
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private void processErrorCode(int nErrorCode) =c"`>Vi@d
{ -1;BwlL
System.err.println("Error Code : " + nErrorCode); uckag/tv
} yF8 av=<{
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//停止文件下载 hOx'uO`x(
public void siteStop() & gnE"
{ ,`ST Va-
bStop = true; *BF5B\[r?
for(int i=0;i<nStartPos.length;i++)
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fileSplitterFetch.splitterStop(); dgh)Rfp3
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} (sHqzWh
} y0k*iS
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//负责部分文件的抓取 )7l+\t
**FileSplitterFetch.java e)]9u$x
*/ k7z;^:
package NetFox; *NHBwXg+
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import java.io.*; /7/d
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import java.net.*; OXd617
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public class FileSplitterFetch extends Thread { "l &=a1l
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String sURL; //File URL r BQFC4L
long nStartPos; //File Snippet Start Position 7=(rk
long nEndPos; //File Snippet End Position rJ|Q%utYz
int nThreadID; //Thread's ID DN3#W w2[r
boolean bDownOver = false; //Downing is over BQu_)@
boolean bStop = false; //Stop identical kclClB:PS
FileAccessI fileAccessI = null; //File Access interface W ZdEfY{
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException N3nFE:`u]
{ mrX 2w
this.sURL = sURL; Cgq/#2BM
this.nStartPos = nStart; C8 9c2
this.nEndPos = nEnd; 1BO$xq
nThreadID = id; ?^t"tY
fileAccessI = new FileAccessI(sName,nStartPos);//定位 ofH=h
} PeT _Ty
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public void run() g`I`q3EF)
{ yV[9 (
while(nStartPos < nEndPos && !bStop) "Ah (EZAR
{ J/X{
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try{ &.J8O+
URL url = new URL(sURL); INtt0Cm9"
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); cVya~ *
httpConnection.setRequestProperty("User-Agent","NetFox"); *y<Ru:D
String sProperty = "bytes="+nStartPos+"-"; __o`+ ^FS
httpConnection.setRequestProperty("RANGE",sProperty); ]wFKXZeK
Utility.log(sProperty); ?@8[1$1a
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InputStream input = httpConnection.getInputStream(); {@, } M
//logResponseHead(httpConnection); ^wN x5t
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byte[] b = new byte[1024]; =%P'?(o|
int nRead; acr@erk
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^PA[fL"
{ o>*vG
nStartPos += fileAccessI.write(b,0,nRead); .#0),JJZ[
//if(nThreadID == 1) FYq]-k{\
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9ZFvN*Zf'
} 7fRL'I#[@
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Utility.log("Thread " + nThreadID + " is over!"); ]AkHNgW
bDownOver = true; >`L)E,=/
//nPos = fileAccessI.write (b,0,nRead); ."b=dkx
} $Lg%CY
catch(Exception e){e.printStackTrace ();} %{qJkjG
} NJK?5{H'
} %. ^8&4$+
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//打印回应的头信息 N5 ITb0Tv
public void logResponseHead(HttpURLConnection con) *I,3,zO
{ 8&snLOU
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for(int i=1;;i++) E/ %S0
{ tk3%0XZH
String header=con.getHeaderFieldKey(i); P5M+usx
if(header!=null) zWvG];fsN
//responseHeaders.put(header,httpConnection.getHeaderField(header)); R{{d4=:S
Utility.log(header+" : "+con.getHeaderField(header)); n.zVCKNH
else iC- ?F
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break; 5c6CH k`:
} gNkx]bm
} Y^5X>
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public void splitterStop() 4
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{ &X0/7)*"v
bStop = true; nsR^TD;
} uV1H iv-
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} Vlb L
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7+]T}4;
/* T3
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**FileAccess.java ;-84cpfu
*//文件访问(定位,写) N,v4SIC@
package NetFox; * ;A I0
import java.io.*; ,])@?TJb@
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public class FileAccessI implements Serializable{ %-"?
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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 pAg;Rib
RandomAccessFile oSavedFile; *0bbSw1kc
long nPos; "aNl2 T
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public FileAccessI() throws IOException W"9iFj X
{ N{n}]Js1D-
this("",0); 6_/oVvd
} !ZP1?l30
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public FileAccessI(String sName,long nPos) throws IOException pJ7wd~wF*
{ B.fLgQK0
oSavedFile = new RandomAccessFile(sName,"rw"); FxOhF03\=[
this.nPos = nPos; }%k,PYe/
oSavedFile.seek(nPos); :@g@jcbYq`
} #$V`%2>
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public synchronized int write(byte[] b,int nStart,int nLen) aM'0O![d
{ ,-u | l
int n = -1; =!NYvwg6;o
try{ I%xrDiK97
oSavedFile.write(b,nStart,nLen); QI>yi&t
n = nLen; QC>I<j&`!
} 'qLk"
catch(IOException e) j9C=m"O
{ =0xuH>WY}w
e.printStackTrace (); b!hxx Z
} 6$wS7Cu
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return n; ><iE VrpN
} UNocm0!N'
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} QQ@, v@j5
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/* [ANit0-~
**SiteInfoBean.java 1DcYc-k#
*/ SqY;2:
package NetFox; jM
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public class SiteInfoBean { 6, ag\
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private String sSiteURL; //Site's URL !$h%$se
private String sFilePath; //Saved File's Path 18w[T=7)
private String sFileName; //Saved File's Name Zx25H"5j
private int nSplitter; //Count of Splited Downloading File Faa:h#
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public SiteInfoBean() sAk~`(:4!
{//nSplitter的缺省值为5 Bt,qG1>$-
//default value of nSplitter is 5 dv4)fG]W;_
this("","","",5); IC[SJVH;
} &dvJg
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) [.<