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**SiteFileFetch.java 24T@N~\g
*/ uQGz;F x
package NetFox; AVXX\n\_
import java.io.*; `y\*m]:
import java.net.*; ds*m6#1b
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public class SiteFileFetch extends Thread { $uEJn&n7}
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SiteInfoBean siteInfoBean = null; //文件信息Bean *0%4l_i
long[] nStartPos; //开始位置 uy/y wm/?=
long[] nEndPos; //结束位置 .A3DFm3 t
FileSplitterFetch[] fileSplitterFetch; //子线程对象 -"W )|oC_
long nFileLength; //文件长度 :8p&#M
boolean bFirst = true; //是否第一次取文件 BRQ"A,
boolean bStop = false; //停止标志 n?'d|h
File tmpFile; //文件下载的临时信息 &EAk
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DataOutputStream output; //输出到文件的输出流 [096CK
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ,f}h}
public SiteFileFetch(SiteInfoBean bean) throws IOException H4M{_2DO
{ `1nRcY
siteInfoBean = bean; 9<xTu>7J
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); BG'6;64kx6
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); a
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if(tmpFile.exists ()) G/v|!}?wG
{ `kv1@aQPL
bFirst = false; eYJ{LPo
read_nPos(); m)s
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} <"*"1(wN
else ZhH+D`9
{ hVMYB_<~
nStartPos = new long[bean.getNSplitter()]; X?tj$
nEndPos = new long[bean.getNSplitter()]; Q]< (bD.7
} +"'F Be
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} LO"_NeuL
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public void run() )T>8XCL\}
{ 82lr4
//获得文件长度 $Axng
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//分割文件 <5dH *K
//实例FileSplitterFetch x+4vss
//启动FileSplitterFetch线程 \CcmePTN#x
//等待子线程返回 (nGkZ}p
try{ e#tIk;9Xz
if(bFirst) nz^nptw
{ XJe/tR
nFileLength = getFileSize(); E]NY
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if(nFileLength == -1) GGH;Z WSe
{ "X`RQ6~]>
System.err.println("File Length is not known!"); BsKbn@'uC
} vCj4;P g
else if(nFileLength == -2) Hw Z^D=A
{ 0z/h+,
System.err.println("File is not access!"); xJ-*%'(KZ
} UmJUt|
else |VK:2p^ u
{ .N5'.3
for(int i=0;i<nStartPos.length;i++) 8=:A/47=J
{ AWO0NWTB
nStartPos = (long)(i*(nFileLength/nStartPos.length)); \I;cZ>{u"}
} h-7A9:
for(int i=0;i<nEndPos.length-1;i++) 't7Z] G
{ 9qEOgJ
nEndPos = nStartPos[i+1]; [6H}/_nD
} b7bSTFZxC
nEndPos[nEndPos.length-1] = nFileLength; bZ/
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} h0|[etaf
} qmEoqU
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//启动子线程 _74UdD{^o
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ' PELf
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for(int i=0;i<nStartPos.length;i++) >)LAjwhBp
{ u*hH}
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >rKhlUD
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), zhX;6= X2
nStartPos,nEndPos,i); /9 pbnzn
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); X<Z(]`i
fileSplitterFetch.start(); _
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} V~85oUc\-
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), GA\2i0ow
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Twx{' S
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", H<,bq*@
nEndPos = " + nFileLength); Uj,g]e8e
// fileSplitterFetch[nPos.length-1].start(); okz]Qc>G
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//等待子线程结束 8
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//int count = 0; "J& (:(:
//是否结束while循环 w,Q)@]_
boolean breakWhile = false; &3I$8v|!?
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while(!bStop) ehE-SrkU'
{ 4`s)ue
write_nPos();
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Utility.sleep(500); -bA!PeI
breakWhile = true; Pg
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for(int i=0;i<nStartPos.length;i++) +C_*Vs@4
{ RyuEHpN}
if(!fileSplitterFetch.bDownOver) t@)my[ !
{ 8"i/wMP]
breakWhile = false; M6_-f ;.
break; 12lEs3
} 4:U0f;Fs
} dKm`14f]@G
if(breakWhile) Aq"PG}Ic
break; yX'IZk#_L
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//count++; V\AK6U@r^
//if(count>4) Y%g "Y
// siteStop(); V9T
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} aM$=|%9/
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System.err.println("文件下载结束!"); Ff<)4`J
} r1G8]a gO
catch(Exception e){e.printStackTrace ();} 4\ FP
} |'<vrn
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//获得文件长度 D#jX6
public long getFileSize() ?L\z}0#
{ @Dj:4
int nFileLength = -1; VhvTBo<cw
try{ @8zT'/$
URL url = new URL(siteInfoBean.getSSiteURL()); dF
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HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /PqUXF
httpConnection.setRequestProperty("User-Agent","NetFox"); :G 5C ]'t
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int responseCode=httpConnection.getResponseCode(); PBrnzkoY
if(responseCode>=400) %K zbO0
{ O&V[g>x"U
processErrorCode(responseCode); &Mj1CvCv
return -2; //-2 represent access is error ;&
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} !BUi)mo
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String sHeader; G3dhM#!
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for(int i=1;;i++) o?wt$j-
{ ln#\sA?iG
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); &SmXI5>Bo0
//Utility.log(in.readLine()); ~^7r?<aKc
sHeader=httpConnection.getHeaderFieldKey(i); JYV\oV{
if(sHeader!=null) wAh#
{ ltSh'w0
if(sHeader.equals("Content-Length")) S?4KC^Y5
{ x:
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nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); oy5+}`
break; L/x(RCD
} L\L"mc|O
} 7|Dn+=
else +"uwV1)b"
break; <d"Gg/@a
} 0`n
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} 8=F %+
catch(IOException e){e.printStackTrace ();} Hf%_}Du /`
catch(Exception e){e.printStackTrace ();} SF< [FM%1
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Utility.log(nFileLength); v`B4(P1Z
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return nFileLength; )GJP_*Ab
} v[&'k\
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//保存下载信息(文件指针位置) ?3jdg ]&
private void write_nPos() HO5d%85
{ G),db%,X2
try{ Yy
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output = new DataOutputStream(new FileOutputStream(tmpFile)); Hk u=pr3Gn
output.writeInt(nStartPos.length); 4RQ5(YTTuR
for(int i=0;i<nStartPos.length;i++) /{X_
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{ ]:et~pfW
// output.writeLong(nPos); k1fRj_@WPT
output.writeLong(fileSplitterFetch.nStartPos); w>vH8f
output.writeLong(fileSplitterFetch.nEndPos); :JlDi>B
} D|Si)_
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output.close(); C9jbv/c
} -H\,2FO
catch(IOException e){e.printStackTrace ();} V]c5
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catch(Exception e){e.printStackTrace ();} }V]eg,.BJ
} z-@-O
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//读取保存的下载信息(文件指针位置) <xlm
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private void read_nPos() Mm#[&j[Y
{ gs`> C(
try{ tcA;#^jc
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); =i6:puf
int nCount = input.readInt(); ^~l $&~
nStartPos = new long[nCount]; f&yQhe6 q
nEndPos = new long[nCount]; *#2Rvt*Ox
for(int i=0;i<nStartPos.length;i++) O,mip
{ hZN<Yd8:
nStartPos = input.readLong(); ~G`J
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nEndPos = input.readLong(); C3S`}o.
} -t4
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input.close(); 1TRN~#ix
} <Tx C!{<
catch(IOException e){e.printStackTrace ();} A]?^ H<
catch(Exception e){e.printStackTrace ();} `o
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} 8i:[:Z
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private void processErrorCode(int nErrorCode) Y&~M7TY b
{ C4NRDwU|.
System.err.println("Error Code : " + nErrorCode); a+?~;.i~
} 'm O2t~n
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//停止文件下载 1q]c7"
public void siteStop() %;O}FyP
{ / L~u02?
bStop = true; Y8ehmz|g]J
for(int i=0;i<nStartPos.length;i++) H06Bj(Y!
fileSplitterFetch.splitterStop(); U CY2]E
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} 6vp0*ww
} SI*^f\lu
//负责部分文件的抓取 <y>:B}9'
**FileSplitterFetch.java B*@6xS[IL
*/ Dg2uE8k
package NetFox; V8"Wpl9Cz
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import java.io.*; s#^pC*,'
import java.net.*; &U&%ka<*
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public class FileSplitterFetch extends Thread { >V!LitdJ
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String sURL; //File URL Ze
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long nStartPos; //File Snippet Start Position s[c^"@HT
long nEndPos; //File Snippet End Position eb!_ie"D
int nThreadID; //Thread's ID hI~SAd
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boolean bDownOver = false; //Downing is over !k<:k
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boolean bStop = false; //Stop identical ]rW8y%yD
FileAccessI fileAccessI = null; //File Access interface TnE+[.Qu
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException oJY[{-qW
{ #@Y/{[s|@
this.sURL = sURL; &
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this.nStartPos = nStart; ]d'^Xs
this.nEndPos = nEnd; z\.1>/Z=
nThreadID = id; nyhMnp#<
fileAccessI = new FileAccessI(sName,nStartPos);//定位 zWIeHIt
} "=|t ~`
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public void run() 6/2v
{ JBcY!dy-d
while(nStartPos < nEndPos && !bStop) \6sQJq
{ 2QayM?k8
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try{ JJf<*j^G
URL url = new URL(sURL); 59!)j>f
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); fLB1)kTS
httpConnection.setRequestProperty("User-Agent","NetFox"); \&q=@rJp(z
String sProperty = "bytes="+nStartPos+"-"; .3wY\W8Dr-
httpConnection.setRequestProperty("RANGE",sProperty); {}\CL#~y
Utility.log(sProperty); GLh]G(
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InputStream input = httpConnection.getInputStream(); +d39f-[
//logResponseHead(httpConnection); 7BFN|S_l
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byte[] b = new byte[1024]; f a5]a
int nRead; ;$!I&<)
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) aWaw&u
{ Rd! 2\|
nStartPos += fileAccessI.write(b,0,nRead); )HVcG0H1
//if(nThreadID == 1) Tsz
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// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); D ,M@8h,
} M|%c(K#E,3
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Utility.log("Thread " + nThreadID + " is over!"); #T%zfcUj
bDownOver = true; yQ[u3tI
//nPos = fileAccessI.write (b,0,nRead); w0Ij'=:
} Y@} FL;3
catch(Exception e){e.printStackTrace ();} -:]@HD :
} -JTG?JOd]
} #IX&9 aFB}
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//打印回应的头信息 H;I~N*ltJ(
public void logResponseHead(HttpURLConnection con) Z .Pi0c+
{ }gCHQ;U7`
for(int i=1;;i++) yJ/#"z=h?
{ #s+Q{2s
String header=con.getHeaderFieldKey(i); %#k,6;m
if(header!=null) |Fv?6qw+
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 2k+16/T
Utility.log(header+" : "+con.getHeaderField(header)); -e*BqH2t
else v2J0u:#,
break; RvW.@#EH0
} _4R,Ej}
} -P#nT 2
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public void splitterStop() \"d?=uFe
{ ?}sOG?{
bStop = true; o#e7,O
} !Zs,-=^D
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} 7a<_BJXx
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/* (,LL[&;:
**FileAccess.java 'F5)ACA%
*//文件访问(定位,写) :]c=pH
package NetFox; NG9vml
import java.io.*; d@g2k> >
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public class FileAccessI implements Serializable{ QS\
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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 kF-TG3
RandomAccessFile oSavedFile; QymD-A"P
long nPos; O71BM@2<
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public FileAccessI() throws IOException 'v`_Ii|-
{ Yy@g9mi
this("",0); `Zf9$K|
} &@; RI~
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public FileAccessI(String sName,long nPos) throws IOException bi,mM,N/
{ l* Y[^'
oSavedFile = new RandomAccessFile(sName,"rw"); |<Bpv{]P
this.nPos = nPos; 1Z:R,\+L
oSavedFile.seek(nPos); +/q0Y`v
} yW>R RE;
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public synchronized int write(byte[] b,int nStart,int nLen) (C\r&N