/* ?SkYFa`u*
**SiteFileFetch.java J`Q#p%W
*/ ,a~-
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package NetFox; FzXVNUMP
import java.io.*; @;"HslU\Q
import java.net.*; O}*[@uv/
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public class SiteFileFetch extends Thread { @G~T&6E!
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SiteInfoBean siteInfoBean = null; //文件信息Bean .^X IZ
long[] nStartPos; //开始位置 JGHQ_AI
long[] nEndPos; //结束位置 M#IGq
FileSplitterFetch[] fileSplitterFetch; //子线程对象 #K yb9Qg
long nFileLength; //文件长度 Vdjf
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boolean bFirst = true; //是否第一次取文件 ac p-4g+j
boolean bStop = false; //停止标志 %1 9TJn%J$
File tmpFile; //文件下载的临时信息 e(@ YBQ/Z
DataOutputStream output; //输出到文件的输出流 ahU\(=
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) OAEJ?ik
public SiteFileFetch(SiteInfoBean bean) throws IOException 9e@Sx{?r
{ 9\0
siteInfoBean = bean; ;sT7c1X^!
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); N^Xb_jg;J
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); G sm5L<rx
if(tmpFile.exists ()) V)^nVD)e
{ ;Bd0 =C
bFirst = false; r%}wPN(?D
read_nPos(); #5-0R7\d7
} .\7R/cP}{A
else ~raRIh=
{ ygW,4Vz7J
nStartPos = new long[bean.getNSplitter()]; ;HlVU
nEndPos = new long[bean.getNSplitter()]; =q.2S;?
} 3gQQ,V..
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} Jk!}z+X'A
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public void run() x\)0+c~\}x
{ KA#4iu{
//获得文件长度 M~t S
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//分割文件 D"oyl`q
//实例FileSplitterFetch Y? =+A4v
//启动FileSplitterFetch线程 3b
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//等待子线程返回 79AOvh
try{ P
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if(bFirst) `r
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{ >j{phZ
nFileLength = getFileSize(); DB-4S-2
if(nFileLength == -1) we9R4*j
{ #qi@I;;t
System.err.println("File Length is not known!"); m2AA:u_*j
} .h-:)e*
else if(nFileLength == -2) (y7U}Sb'
{ B9`nV.a
System.err.println("File is not access!"); sa36=:5x-
} w8:~LX.n
else 1tHTjEG4^3
{ V
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for(int i=0;i<nStartPos.length;i++) yHT8I
{ ^n"ve2
nStartPos = (long)(i*(nFileLength/nStartPos.length)); ~T7\lJ{%G
}
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for(int i=0;i<nEndPos.length-1;i++) {<5rbsqk
{ \/I@&$"F
nEndPos = nStartPos[i+1]; / Li?;H
} u~=>$oT't
nEndPos[nEndPos.length-1] = nFileLength; /v7U~i5
} qd6XKl\5
} '9>z4G*Td
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//启动子线程 f'Dl*d
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; v?F~fRH
for(int i=0;i<nStartPos.length;i++) 6H\3
{ id8a#&t]
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), nyD(G=Q5
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), BY.'0,H=k
nStartPos,nEndPos,i);
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Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )=V0
fileSplitterFetch.start(); %,Xs[[?i
} N%'=el4L
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), *aT3L#0(
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 'z0@|a
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", LRW7_XYz
nEndPos = " + nFileLength); (?Fz{
// fileSplitterFetch[nPos.length-1].start(); yxh8sAZ
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//等待子线程结束 l 3bo
//int count = 0; BFc=GiPnQ
//是否结束while循环 c7.%Bn,
boolean breakWhile = false; rwGY )9|
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while(!bStop) 3yn>9qt
{ N1`/~Gi
write_nPos(); HWG5Ghu8,)
Utility.sleep(500); )<-\ F%&b
breakWhile = true; k;/U6,LQ*
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for(int i=0;i<nStartPos.length;i++) N
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{ pwU
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if(!fileSplitterFetch.bDownOver) fx2r\ usX[
{ :
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breakWhile = false; zBV7b| j
break; A
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} ORHs1/L`j
} yPL1(i;
if(breakWhile) DS0c0lsx
break; JJ[.K*dO
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//count++; *U|K~dl]K
//if(count>4) q '9u8b
// siteStop(); .I_Mmaq;i
} *P]FX-D3
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System.err.println("文件下载结束!"); U<QO@5
} U0G(
catch(Exception e){e.printStackTrace ();} (+lwt
} qKag'0e
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//获得文件长度 + pTc2z
public long getFileSize() [Zc8tE2oN
{ U[1Rw6
int nFileLength = -1; Ze_4MwCW
try{ N#
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URL url = new URL(siteInfoBean.getSSiteURL()); &g%9$*gmT
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;DbEP. %u$
httpConnection.setRequestProperty("User-Agent","NetFox"); H=O/w3
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int responseCode=httpConnection.getResponseCode(); @."_XL74
if(responseCode>=400) PoTJ4z
{ 6wK>SW)#&j
processErrorCode(responseCode); mDZ/Kp{
return -2; //-2 represent access is error L,6v!9@
} eK[8$1
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String sHeader; ?T]3I.3
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for(int i=1;;i++) [xW;5j<87
{ yh~*Kt]9Ya
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 3VNYDY`>
//Utility.log(in.readLine()); oZm)@Vv;
sHeader=httpConnection.getHeaderFieldKey(i); u*LMpTnn
if(sHeader!=null) W
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{ gD`|N@W$5
if(sHeader.equals("Content-Length")) {}>s0B
{ ;pn*|Bsq
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 5Us$.p
break; _D<=Yo
} 4h% G %>j
} TKJs'%Q7F6
else IqEE.XhaK
break; zpi
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} x -CTMKX
} fL-lx-~
catch(IOException e){e.printStackTrace ();} S~L;oX?(!
catch(Exception e){e.printStackTrace ();} v__n>*x
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Utility.log(nFileLength); G':wJ7[]`
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return nFileLength; &!Sq6<!v2
} W&MZ5t,k=
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//保存下载信息(文件指针位置) *nZe|)m
private void write_nPos() Wgp}v93
{ \piB*"ln
try{ VS.~gHx
output = new DataOutputStream(new FileOutputStream(tmpFile)); Jkf%k3H3I*
output.writeInt(nStartPos.length); LdAWCBLS
for(int i=0;i<nStartPos.length;i++) :@x_& b
{ \_GG6
// output.writeLong(nPos); Vz4/u|gt
output.writeLong(fileSplitterFetch.nStartPos); ,v^A;,q
output.writeLong(fileSplitterFetch.nEndPos); {nQ?+o3
} 5pC+*n.
output.close(); zoh%^8?o
} w~+C.4=7
catch(IOException e){e.printStackTrace ();} mV~aZM0'
catch(Exception e){e.printStackTrace ();} } J_"/bB
} R
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//读取保存的下载信息(文件指针位置) "INIP?
private void read_nPos() 5B:%##Ug5
{ *yX5g,52-|
try{ !]#@:Z
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); TPE1}8p17
int nCount = input.readInt(); ?LxBH-o(
nStartPos = new long[nCount]; %X|fp{C
nEndPos = new long[nCount]; kh7RQbNY<I
for(int i=0;i<nStartPos.length;i++) ([g[\c,H
{ kJP`C\4}f
nStartPos = input.readLong(); p"'knZG
nEndPos = input.readLong(); U!y GZEU"[
} 9-B/n0
input.close(); e^ Aw%t
} ~-J!WC==U
catch(IOException e){e.printStackTrace ();} d+m}Z>iQ1O
catch(Exception e){e.printStackTrace ();} }Mv$Up
} u)X]]6YJ
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private void processErrorCode(int nErrorCode) $V/Hr/0
{ 4`X]$.
System.err.println("Error Code : " + nErrorCode); b7uxCH]Z
} Cf~vT"
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//停止文件下载 #B$r|rqamq
public void siteStop() J=l\t7w
{ :abpht
bStop = true; >Tf <8r,
for(int i=0;i<nStartPos.length;i++) Hoj'zY
fileSplitterFetch.splitterStop(); yhPO$L
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} 4{v?<x8
} gl$}t H
//负责部分文件的抓取 9M]%h
**FileSplitterFetch.java Jn\@wF9xd
*/ >?L)+*^
package NetFox; D!g\-y
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import java.io.*; hJc^NU5
import java.net.*; (ah^</
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public class FileSplitterFetch extends Thread { S%6 V(L|
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String sURL; //File URL Tfytc$aQ
long nStartPos; //File Snippet Start Position "KHe6otmi_
long nEndPos; //File Snippet End Position I9ZJ"29
int nThreadID; //Thread's ID s
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boolean bDownOver = false; //Downing is over LLV1W0VO=P
boolean bStop = false; //Stop identical $/)0iL{0
FileAccessI fileAccessI = null; //File Access interface <)]j;Tl
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Qd"R@+i
{ ^ZD0rp(l
this.sURL = sURL; 8mnzxtk
this.nStartPos = nStart; 9O{b8=\}
this.nEndPos = nEnd; JY0}#FtgV
nThreadID = id; dfR?O#JPU
fileAccessI = new FileAccessI(sName,nStartPos);//定位 %;ZDw@_<
} gyT3[*eh
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public void run() IKFNu9*"h
{ KB`">zq$u
while(nStartPos < nEndPos && !bStop) _|C T|q
{ IAFj_VWC0
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try{ $=ua$R4Z+
URL url = new URL(sURL); jQX9KwSP
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Egm-PoPe
httpConnection.setRequestProperty("User-Agent","NetFox"); d-ML[^G
String sProperty = "bytes="+nStartPos+"-"; Fu*Qci1Z
httpConnection.setRequestProperty("RANGE",sProperty); E/Adi^
Utility.log(sProperty); /zTx+U.\I
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InputStream input = httpConnection.getInputStream(); xN>+!&3%w
//logResponseHead(httpConnection); FNHJHuTe
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byte[] b = new byte[1024]; o#frNT}
int nRead; ZK?:w^Z
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ,/Yo1@U
{ )%Lgo${[;
nStartPos += fileAccessI.write(b,0,nRead); g7`uWAxZa
//if(nThreadID == 1) lfe^_`ij(+
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); e)Pm{:E
} 'l41];_
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Utility.log("Thread " + nThreadID + " is over!"); ibxtrt=
bDownOver = true; yiAusl;
//nPos = fileAccessI.write (b,0,nRead); Zoyo:vv&
} z\6/?5D#v
catch(Exception e){e.printStackTrace ();} k}908%w
} 0$I!\y\
} 1g1gu=|Q
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//打印回应的头信息 |X0Ys8f
public void logResponseHead(HttpURLConnection con) I%#
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{ [+
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for(int i=1;;i++) O#@KP"8
{ J%ue{PL7
String header=con.getHeaderFieldKey(i); F^}n7h=qk
if(header!=null) $-R9J6NN
//responseHeaders.put(header,httpConnection.getHeaderField(header)); z!
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Utility.log(header+" : "+con.getHeaderField(header));
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else ;h#nal>w@S
break; I.L8A|nZ
} //H3{^{
} *+>R^\uT
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public void splitterStop() r/BiR0$E
{ >a5avSn
bStop = true; K0\Wty0
} 3I.0uLjg^
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} }RY&f4&GV,
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/* <B=!ZC=n
**FileAccess.java ey3;rY1
*//文件访问(定位,写) ~zA{=|I2
package NetFox; %Q[+bN[/
import java.io.*; zFk@Y
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public class FileAccessI implements Serializable{ {r?qI
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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 "yV)&4)
RandomAccessFile oSavedFile; $N`uM
long nPos; ?FRQ!R
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public FileAccessI() throws IOException BlvNBB1^
{ !WReThq
this("",0); h8uDs|O9n
} u:7=Yy
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public FileAccessI(String sName,long nPos) throws IOException *tZ#^YG{(
{ vaEAjg*To<
oSavedFile = new RandomAccessFile(sName,"rw"); :j m|)
this.nPos = nPos; 7OOod1
oSavedFile.seek(nPos); tHo0q<.oX
} 5`3f"(ay/
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public synchronized int write(byte[] b,int nStart,int nLen) X@7K#@5
{ 07dUBoq
int n = -1; PX1Scvi
try{ dLek4q
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oSavedFile.write(b,nStart,nLen); 6uH1dsD
n = nLen; pY9>z;qD
} o )
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catch(IOException e) FE/2.!]&o
{ 8Bnw//_pT
e.printStackTrace (); ^D0BGC&&
} ]Zf@NY
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return n; XU#nqvS` .
} 9N'um%J3%s
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} /fM6%V=Y
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/* db!2nImNu\
**SiteInfoBean.java T7.u7@V2
*/ `|^<y.-6
package NetFox; E4'D4@\W
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public class SiteInfoBean { :6z0Ep"
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private String sSiteURL; //Site's URL XabrX|B#
private String sFilePath; //Saved File's Path 8&=+Mw
private String sFileName; //Saved File's Name 5W!E.fz*T
private int nSplitter; //Count of Splited Downloading File 6zLz<p?
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public SiteInfoBean() ?mt$c6-
{//nSplitter的缺省值为5 Ffm Q$>S
//default value of nSplitter is 5 | ~G;M*q
this("","","",5); LE Y Y{G?
} vAJfMUlP
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) EVj48
{ 9_ Qm_
sSiteURL= sURL; <][|,9mw
sFilePath = sPath; R^F99L
sFileName = sName; %;zWS/JhL
this.nSplitter = nSpiltter; 7q|(ZZa
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} 7@vcQv
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public String getSSiteURL() m`9)DsR
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{ %'* |N[
return sSiteURL; YS{
} ,oP-:q!PC
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public void setSSiteURL(String value) hP,1;`[1
{ h3p 3~xq
sSiteURL = value; fINM$ 6
} ~9oS~fP?I
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public String getSFilePath() ~ilbW|s?=k
{ (p14{
return sFilePath; N"t,6tH
} aXC`yQ?
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public void setSFilePath(String value) XE$eHx3;
{ e`$v\7K
sFilePath = value; ~:)$~g7>b
} :M3l#`4Q
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public String getSFileName() ~*B1}#;
{ z7P PwTBa
return sFileName; lGLZIp
} RFK
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public void setSFileName(String value) S|]~,l2]}
{ Gs?W7}<$
sFileName = value; 9$DVG/
} RL&3 P@r
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