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**SiteFileFetch.java )9~-^V0A^>
*/ )ad6>Y
package NetFox; $guaUe[x
import java.io.*; )o N#%%SB<
import java.net.*; `CqF&b
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public class SiteFileFetch extends Thread { +WfO2V.
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SiteInfoBean siteInfoBean = null; //文件信息Bean N}X7g0>hV
long[] nStartPos; //开始位置 6$x9@x8
long[] nEndPos; //结束位置 >>R,P
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FileSplitterFetch[] fileSplitterFetch; //子线程对象 5o2vj8::
long nFileLength; //文件长度 h%+6y
boolean bFirst = true; //是否第一次取文件 -XMWN$Ah
boolean bStop = false; //停止标志 BQF7S<O+
File tmpFile; //文件下载的临时信息 |0s)aV|K
DataOutputStream output; //输出到文件的输出流 *]+5T-R% $
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) .EdQ]c-E=
public SiteFileFetch(SiteInfoBean bean) throws IOException Q/y"W,H#
{
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siteInfoBean = bean; AB[#
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); c7f11N!v>b
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Rpou.RrXR7
if(tmpFile.exists ()) RDsBO4RG
{ lL6W:Fq@(
bFirst = false; #8sv*8&
read_nPos(); <NlL,
} L)-1( e<x
else mm9xO%
{ Fz1K*xx'
nStartPos = new long[bean.getNSplitter()]; 'l&bg 8K9
nEndPos = new long[bean.getNSplitter()]; 4#Id0['
} ]^BgSC
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} 3R)_'!R[B
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public void run() _}3NLAqg
{ Ew>lk9La(
//获得文件长度
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//分割文件 B0dv_'L}L
//实例FileSplitterFetch *G(ZRj@33
//启动FileSplitterFetch线程 mz?1J4rt
//等待子线程返回 M~LYq
try{ ix!4s613w
if(bFirst) o*Kl`3=]
{ qfa[KD)!aB
nFileLength = getFileSize(); }/g1s71
if(nFileLength == -1) H`EsFKw\%
{ +~f5dJyk`
System.err.println("File Length is not known!"); S?e*<s9k
} Q5>]f/LD
else if(nFileLength == -2) At)\$GJ
{ <0!)}O
System.err.println("File is not access!"); Rb
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} IW5N^J
else WYY&MHp
{ [E6ZmMB&
for(int i=0;i<nStartPos.length;i++) JxLSQ-"
{ HrH!
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); W}rL HAaDh
} 4)+L(KyB2
for(int i=0;i<nEndPos.length-1;i++) %w#8t#[,6
{ Rn5{s3?F~2
nEndPos = nStartPos[i+1]; E0aJ~A(Hv
} *4?%Y8;bF6
nEndPos[nEndPos.length-1] = nFileLength; j,CVkA*DY
} \>p\~[cxt
} *!&,)''
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//启动子线程 -PLh|
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; uL9O_a;!
for(int i=0;i<nStartPos.length;i++) F%`O$uXA
{ z-G*:DfgH
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 26[m7\O
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 1}"Prx-
nStartPos,nEndPos,i); JHCXUT-r{
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ( Qj;B)
fileSplitterFetch.start(); `i{p6-U3
} [kL`'yi
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), NZ:KJ8ea"
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 9Je+|+s]
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", h$$2(!G4
nEndPos = " + nFileLength); xa$4P [
// fileSplitterFetch[nPos.length-1].start(); e(Y5OTus
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//等待子线程结束 rYPj3!#
//int count = 0; UB3hC`N\
//是否结束while循环 y?ypRCgO.u
boolean breakWhile = false; :[!b";pR
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while(!bStop) =}
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{ BT*{&'\/
write_nPos(); a|kEza,]
Utility.sleep(500); 6h{>U*N"&d
breakWhile = true; 8<PQ31
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for(int i=0;i<nStartPos.length;i++) *IIuGtS
{ qTI_'q
if(!fileSplitterFetch.bDownOver) -$ha@bCWO
{ ^|ul3_'?
breakWhile = false;
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break; - sL4tMP
} [BuAJ930#5
} 'W*ODAz6
if(breakWhile) LjPpnjU
break; ChRCsu~
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//count++; oL
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//if(count>4) n |Q'>
// siteStop(); xew s~74L
} U)C>^ !Us
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System.err.println("文件下载结束!"); h=ben&m
}
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catch(Exception e){e.printStackTrace ();} ~=gpn|@b
} |SuN3B4e
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//获得文件长度 )uC5
public long getFileSize() f J+
{ "GB493=v
int nFileLength = -1; %OJq( }
try{ |6 E
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URL url = new URL(siteInfoBean.getSSiteURL()); <8BNqbX
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ah_0o_Di
httpConnection.setRequestProperty("User-Agent","NetFox"); dyVfDF
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int responseCode=httpConnection.getResponseCode(); ky I~
if(responseCode>=400) E^? 3P'%^
{ li9>zjz
processErrorCode(responseCode); $Go)Zs-bL?
return -2; //-2 represent access is error d'[]
} <`d;>r=4z
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String sHeader; @6%o0p9zz
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for(int i=1;;i++) @P/6NMjZ^
{ '1rO&F
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 91M5F$
//Utility.log(in.readLine()); =DwY-Ex
sHeader=httpConnection.getHeaderFieldKey(i); S@cKo&^
if(sHeader!=null) ^1;Eq>u
{ o ^""=Z
if(sHeader.equals("Content-Length")) l!j,9wz7
{ :(#5%6F
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); -YY@[5x?u
break; 2X6L'!=
} e#(X++G
} w]O,xO
else J
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break; > *soc!# Y
} o<Qt<*
} rY295Q
catch(IOException e){e.printStackTrace ();} Zu|qN*N4
catch(Exception e){e.printStackTrace ();}
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Utility.log(nFileLength); G{gc]7\=Cd
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return nFileLength; F~?|d0
} :*MR$Jf
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//保存下载信息(文件指针位置) ~8U 0(n:^
private void write_nPos() gl 27&'?E*
{ Z6 E_Y?
try{ SE6c3
output = new DataOutputStream(new FileOutputStream(tmpFile)); \`R8s_S
output.writeInt(nStartPos.length); {_UOS8j7
for(int i=0;i<nStartPos.length;i++) ^Vg-fO]V
{ 1 Q*AQYVY
// output.writeLong(nPos); #@J{ )
output.writeLong(fileSplitterFetch.nStartPos); ( e4#9
output.writeLong(fileSplitterFetch.nEndPos); BH0s` K"
} #'BPW<Ob
output.close(); ;*cCaB0u
} jmF)iDvjuZ
catch(IOException e){e.printStackTrace ();} U\-=|gQ'
catch(Exception e){e.printStackTrace ();} E_\V^
} cVli^*se
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//读取保存的下载信息(文件指针位置) Bo8NY!
private void read_nPos() *
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{ eU\XAN#@
try{ lYS*{i1^ '
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); .mplML0oW
int nCount = input.readInt(); wH+|
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nStartPos = new long[nCount]; >65\
nEndPos = new long[nCount]; A45!hhf
for(int i=0;i<nStartPos.length;i++) a#a n+JY3
{ !\!j?z=O8
nStartPos = input.readLong(); 3Scc"9]
nEndPos = input.readLong(); m .R**g
} W&v|-#7=6
input.close(); t\-|J SZ
} L;v.X'f
catch(IOException e){e.printStackTrace ();} J3$@: S'
catch(Exception e){e.printStackTrace ();} .R)uk
} g]E3+: 5dk
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private void processErrorCode(int nErrorCode) <u/(7H
{ gux?P2f
System.err.println("Error Code : " + nErrorCode); w-3Lw<
} e xkPu-[W
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//停止文件下载 i&{%}==7
public void siteStop() Hwcm t!y
{ XSGBC:U)l
bStop = true; 1x8wQ/p|
for(int i=0;i<nStartPos.length;i++) N_/+B]r }T
fileSplitterFetch.splitterStop(); O=6[/oc
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} d.HcO^
} =}YX I
//负责部分文件的抓取 6";
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**FileSplitterFetch.java |
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*/ )S;3WnQ)
package NetFox; MGY0^6yK5
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import java.io.*; M6GiohI_"P
import java.net.*; zrf
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public class FileSplitterFetch extends Thread { JKy~'>Q
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String sURL; //File URL ;e< TEs
long nStartPos; //File Snippet Start Position EWQLLH "h
long nEndPos; //File Snippet End Position D$@2H>.-
int nThreadID; //Thread's ID a&UzIFdB
boolean bDownOver = false; //Downing is over 4c[/%e:\-
boolean bStop = false; //Stop identical \+=`o .2
FileAccessI fileAccessI = null; //File Access interface i<):%[Q)>
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException g>k?03;
{ #Ge_3^'
this.sURL = sURL; w)B?j
this.nStartPos = nStart; y#th&YC_b
this.nEndPos = nEnd; K:GEC-
nThreadID = id; pb)kN%
fileAccessI = new FileAccessI(sName,nStartPos);//定位 +k~0&lZi
} - Ry+WS=
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public void run() )W InPW
{ F-oe49p5e
while(nStartPos < nEndPos && !bStop) p|8ZHR+
{ EW1,&H
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try{ U| VL+9#hd
URL url = new URL(sURL); L`X5\D'X
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); j>B* 8*Ss
httpConnection.setRequestProperty("User-Agent","NetFox"); _>rM[\|X
String sProperty = "bytes="+nStartPos+"-"; ir"t@"Y;o
httpConnection.setRequestProperty("RANGE",sProperty); nO!&;E&
Utility.log(sProperty); GM?s8yZ<
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InputStream input = httpConnection.getInputStream(); $;'M8L
//logResponseHead(httpConnection); GZ,MC?W
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byte[] b = new byte[1024]; X^K^az&L
int nRead; lWtfcU?S[
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) {\CWoFht>
{ &(A#F[ =0
nStartPos += fileAccessI.write(b,0,nRead); )GAlj;9A$
//if(nThreadID == 1) Wbei{3~$Y"
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); y_}vVHT,
} q4&! mDU
s)`(@"{
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Utility.log("Thread " + nThreadID + " is over!"); ybw\^t
bDownOver = true; )E*f30
//nPos = fileAccessI.write (b,0,nRead); NsP=l]
} PfRA\
catch(Exception e){e.printStackTrace ();} t!*[nfR
} GWWg3z.o"W
}
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//打印回应的头信息 B=L!WGl<!
public void logResponseHead(HttpURLConnection con) U4fv$gV
{ 1W{ oj
for(int i=1;;i++) \t&! &R#
{ #IvKI+"
String header=con.getHeaderFieldKey(i); 6XF Ufi+
if(header!=null) 2[ofz}k]r)
//responseHeaders.put(header,httpConnection.getHeaderField(header)); Eu'E;*-f
Utility.log(header+" : "+con.getHeaderField(header)); vj%"x/TP
else v_EgY2l(
break; $f0u
} cZ|*Zpk
} &qG/\
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public void splitterStop() Tp?IK_
{ |ymW0gh7o$
bStop = true; *3`R W<Z
}
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} Ie/_gz^
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/* #$xtUCqX
**FileAccess.java _>\33V-?b
*//文件访问(定位,写) E> GmFw
package NetFox; /~u^@@.
import java.io.*; mc%.
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public class FileAccessI implements Serializable{ Es7
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 3WF]%P%
RandomAccessFile oSavedFile; S1Y,5,}
long nPos; Z,2?TT|p
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public FileAccessI() throws IOException Ebs]]a>PO
{ &,%n
this("",0); 1a(\F7
} a5/, O4Q
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public FileAccessI(String sName,long nPos) throws IOException Xydx87L/-e
{ ,Ohhl`q(
oSavedFile = new RandomAccessFile(sName,"rw"); y4jiOhF<d
this.nPos = nPos; BedL `[,
oSavedFile.seek(nPos); vw!7f|Pg ~
} k{;?>=FH!
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public synchronized int write(byte[] b,int nStart,int nLen) C('D]u$Hdk
{ wsB-(
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int n = -1; 9_5>MmiB
try{ J&~I4ko]
oSavedFile.write(b,nStart,nLen); L]z8'n,
n = nLen; s3JzYDpy
} <tbs,lcw;
catch(IOException e) 4h!yh2c..
{ jRC{8^98
e.printStackTrace (); ]lfufjj
} ,0h{RZKw
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return n; {ObY1Y`ea
} n]#YL4j
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} F~eYPaEKy!
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/* &&<l}E
**SiteInfoBean.java G2wSd'n*y
*/ igTs[q=Ak
package NetFox; h&