/* |/2LWc?
**SiteFileFetch.java kEx8+2s=M
*/ gBfX}EK7F
package NetFox; }P16Xb)p
import java.io.*; !
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import java.net.*; /;b.-v&
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public class SiteFileFetch extends Thread { _4~k3%w\`l
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SiteInfoBean siteInfoBean = null; //文件信息Bean 2;O c^
long[] nStartPos; //开始位置 69?I?,7
long[] nEndPos; //结束位置 Bac?'ypm
FileSplitterFetch[] fileSplitterFetch; //子线程对象 _RgxKp/d
long nFileLength; //文件长度 `$f\ %
boolean bFirst = true; //是否第一次取文件 ?!_u,sT
boolean bStop = false; //停止标志 YlG;A\]k
File tmpFile; //文件下载的临时信息 E#8J+7
DataOutputStream output; //输出到文件的输出流 .!!79 6hS
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) z{@=_5;
public SiteFileFetch(SiteInfoBean bean) throws IOException A"`L~|&
{ M3)v-"
siteInfoBean = bean; R<_mK33hd
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); h#v L5At
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); j}i,G!-u
if(tmpFile.exists ()) d|R
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{ D1"1MUSod
bFirst = false; S|s3}]g9
read_nPos(); X"laZd947>
} (=6P]~,
else VvzPQ k
{ sn2r>m3
nStartPos = new long[bean.getNSplitter()]; yo'q[YtP'
nEndPos = new long[bean.getNSplitter()]; !2/l9SUi
} 1w(<0Be
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} [>Ikitow
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public void run() 3`mC"ab /
{ 3AX?B~s
//获得文件长度 N+ak[axN
//分割文件 =mDy@%yx!
//实例FileSplitterFetch IJ+O),'
//启动FileSplitterFetch线程 kOo>Iy
//等待子线程返回 -t;?P2
try{ Q1]V|S;)X
if(bFirst) ]Fb8.q5(Y
{ W,0KBkkp
nFileLength = getFileSize(); 9)8*FahW
if(nFileLength == -1) R:SIs\%o
{ wn&[1gBxM
System.err.println("File Length is not known!"); DX]z=d)tc
} H0 {Mlu9
else if(nFileLength == -2) bWhJ^LD
{ s{b0#[
System.err.println("File is not access!"); >1_Dk7E0D
} 2l]C55p)s
else :-W$PIBe
{ JDIz28 Ww
for(int i=0;i<nStartPos.length;i++) VGq{y{(
{ pT|./ Fe
nStartPos = (long)(i*(nFileLength/nStartPos.length)); H&"_}
} s0x@
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for(int i=0;i<nEndPos.length-1;i++) kfH9Y%bOy
{ ?z*W8b]'
nEndPos = nStartPos[i+1]; j 8~Gv=(h
} }])GQ@
nEndPos[nEndPos.length-1] = nFileLength; O~7p^i}
} <FMuWHY
} ,C5@P+A
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//启动子线程 G7Edi;y/{
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Z&2
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for(int i=0;i<nStartPos.length;i++) t[L2'J.5
{ UMnR=~.
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), iPRJA{$b_
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ]9!Gg
nStartPos,nEndPos,i); <m|FccvQ
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Vs2 v j
fileSplitterFetch.start(); krnvFZRTQ
} <v1_F;{n
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), EBN]>zz
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); BV_a-\Sa=
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", #d7)$ub
nEndPos = " + nFileLength); zIX}[l4EW~
// fileSplitterFetch[nPos.length-1].start(); SLbavP#G
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//等待子线程结束 6|>"0[4S
//int count = 0; >d1aE)?
//是否结束while循环 _dH[STT
boolean breakWhile = false; |\yDgs%EGy
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while(!bStop) FQv02V+&<
{ ;NvhL|R
write_nPos(); C/grrw
Utility.sleep(500); \, X?K
breakWhile = true; OP\^c
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for(int i=0;i<nStartPos.length;i++) r;5 AY
{ dqK
if(!fileSplitterFetch.bDownOver) @Reh?]# v
{ P^o"PKA
breakWhile = false; -v/?>
break; AmrJ_YP/t~
} |\{J`5gr
} {/,+_E/
if(breakWhile) \dQ2[Ek
break; [{Klv&>_/
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//count++; _YD<Q@
//if(count>4) +eH=;8
// siteStop(); [jmAMF<F
} +L<w."WG
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System.err.println("文件下载结束!"); C$EFh4
} QjT#GvHY
catch(Exception e){e.printStackTrace ();} 8?]%Qi
} =-#iXP@
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//获得文件长度 ))we\I__8
public long getFileSize() `04Y ;@w
{ $4fjSSB~
int nFileLength = -1; //@sktHsw(
try{ A`mf 8'nTG
URL url = new URL(siteInfoBean.getSSiteURL()); L2Q p6A6S
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Phjf$\pt
httpConnection.setRequestProperty("User-Agent","NetFox"); [eTck73
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int responseCode=httpConnection.getResponseCode(); V0wC@?
if(responseCode>=400) qoyGs}/I8
{ g^|_X1{
processErrorCode(responseCode); O,z%7><
return -2; //-2 represent access is error 1tK6lrhj
} =V4_DJ(&
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String sHeader; 9/^Bj
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for(int i=1;;i++) @a{v>)
{ E].a|4sh
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); IcNI uv
//Utility.log(in.readLine()); ,J4a~fPf
sHeader=httpConnection.getHeaderFieldKey(i); -a#AE|`
if(sHeader!=null) 7dL=E"WL
{ ~(L<uFU V
if(sHeader.equals("Content-Length")) Fb`7aFIf
{ :/?R9JVI
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); { /Q?
break; Y$DgL
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} *1 eTf
} zz''FmedF
else -V)5Tr=
break; E EnTq
} (]#
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} s(DaPhL6Qm
catch(IOException e){e.printStackTrace ();} _J$p<
catch(Exception e){e.printStackTrace ();} mZ.6Njb
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Utility.log(nFileLength); XVK[p=cIL
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return nFileLength; JT+lWhy
} $1`t+0^k
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//保存下载信息(文件指针位置) ~+NFWNgN
private void write_nPos() X2mm'JDwK
{ h4xf%vA(;
try{ %EhU!K#[
output = new DataOutputStream(new FileOutputStream(tmpFile)); ^bgm0,M
output.writeInt(nStartPos.length); iPi'5g(a
for(int i=0;i<nStartPos.length;i++) "r(pK@h
{ DT~y^h
// output.writeLong(nPos); pHbguoH,
output.writeLong(fileSplitterFetch.nStartPos); t~=@r9`S
output.writeLong(fileSplitterFetch.nEndPos); p[+me o
} LFry?HO,D
output.close(); Rhxm)5 +
} At_Y$N:
catch(IOException e){e.printStackTrace ();} a5g{.:NfO
catch(Exception e){e.printStackTrace ();} RwLdV+2\R`
} ^oZs&+z
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//读取保存的下载信息(文件指针位置) %>}7$Y%
private void read_nPos() Z["nY&.sI
{ >]N0w
try{ i!-sbwd7
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); {xx;zjt%}}
int nCount = input.readInt(); LfSUY
nStartPos = new long[nCount]; KQI} 5
nEndPos = new long[nCount]; PL2Q!i`[o
for(int i=0;i<nStartPos.length;i++) OX`GN#yl
{ FbT&w4Um=
nStartPos = input.readLong(); ].+G-<.:
nEndPos = input.readLong();
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} 5nw9zW
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input.close(); [ESQD5&
} o sH,(\4_
catch(IOException e){e.printStackTrace ();} @ dU3d\!}
catch(Exception e){e.printStackTrace ();} 4'e8VI0
} ue2nfp
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private void processErrorCode(int nErrorCode) bWzc=03
{ yxq!.72
System.err.println("Error Code : " + nErrorCode); X-^Oz@.>
} 8o!^ZOmU<
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//停止文件下载 aWK7 -n
public void siteStop() 2xxwQwg8
{ \O4=mJ
bStop = true; n;Wf|>
for(int i=0;i<nStartPos.length;i++) {oC69n:
fileSplitterFetch.splitterStop(); DcM+K@1E4^
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} zL{@LHP
} g5'bUYsa
//负责部分文件的抓取 yc}t(*A5
**FileSplitterFetch.java AR2+W^aM3
*/ cLF>Jvs*J
package NetFox; :Fk&2WsW:
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import java.io.*; t`D@bzLC%
import java.net.*; f}uCiV!?v
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public class FileSplitterFetch extends Thread { (G;*B<|A
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String sURL; //File URL )y Y;%
long nStartPos; //File Snippet Start Position bhT]zsBK
long nEndPos; //File Snippet End Position 2UJ0%k
int nThreadID; //Thread's ID {u][q
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boolean bDownOver = false; //Downing is over id9T[^h
boolean bStop = false; //Stop identical +u.L6GcB
FileAccessI fileAccessI = null; //File Access interface f%l#g ]]
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException tq93 2M4
{
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this.sURL = sURL; #&gy@!a~
this.nStartPos = nStart; c9k,Dc
this.nEndPos = nEnd; B75SLK:h=
nThreadID = id; >,1LBM|0u
fileAccessI = new FileAccessI(sName,nStartPos);//定位 Y5pNKL
} {1ceF
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public void run() j3F=P
{ *mtv[
while(nStartPos < nEndPos && !bStop) r4zS, J;,
{ zK;t041e
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try{ }_TdXY
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URL url = new URL(sURL); 8h2?Q
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [b'fz
httpConnection.setRequestProperty("User-Agent","NetFox"); KfS^sT
String sProperty = "bytes="+nStartPos+"-"; } 4^UVdz
httpConnection.setRequestProperty("RANGE",sProperty); >{8H==P
Utility.log(sProperty); Grv|Wuli
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InputStream input = httpConnection.getInputStream(); 0^^i=iE-u
//logResponseHead(httpConnection); ('oUcDOFTS
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byte[] b = new byte[1024]; Czn7,KE8X
int nRead; 4v$AM8/o
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 4[wP$
{ :r=_\?
nStartPos += fileAccessI.write(b,0,nRead); Pl>t\`1:|A
//if(nThreadID == 1) BO|Jrr>
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); =)LpMTz
} a#=-Aj-
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Utility.log("Thread " + nThreadID + " is over!"); st>t~a|T
bDownOver = true; tp&iOP6O
//nPos = fileAccessI.write (b,0,nRead); 4dAhJjhgD
} J>Ha$1}u/
catch(Exception e){e.printStackTrace ();} f|)t[,c
} rG6/h'!|
} 03T.Owd
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//打印回应的头信息 L&%iY7sC`
public void logResponseHead(HttpURLConnection con) HVpaVM
{ 6h%(0=^
for(int i=1;;i++)
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{ Yn/-m
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String header=con.getHeaderFieldKey(i); 1F/&Y}X
if(header!=null) CXA8V"@&b/
//responseHeaders.put(header,httpConnection.getHeaderField(header)); hpu(MX\
Utility.log(header+" : "+con.getHeaderField(header)); c#Bde-dh
else m` cG&Ar5
break; !T)>q%@ai
} 3[4]G@
} P8f-&(
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public void splitterStop() ZWH`s
{ |)?T([
bStop = true; U$}]zaB
} w.\:I[
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} ;d4_l:9p
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/* h?sh#j6
**FileAccess.java c-F&4V
*//文件访问(定位,写) >8so'7(
package NetFox; YuZnuI@m9
import java.io.*; )C[8#Q-:
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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 4kiu*T
RandomAccessFile oSavedFile; eJ'ojc3
long nPos; jiat5
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public FileAccessI() throws IOException apXq$wWq{D
{ 'Tn$lh
this("",0); ]So%/rOvX
} N*#SY$!y
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public FileAccessI(String sName,long nPos) throws IOException e M}Xn^}
{ _F9
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oSavedFile = new RandomAccessFile(sName,"rw"); ;%}
this.nPos = nPos; J{Jxb1:c
oSavedFile.seek(nPos); q!n|Ju<
} 4{V=X3,x
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public synchronized int write(byte[] b,int nStart,int nLen) W$W7U|Z9y+
{ tF4"28"h
int n = -1; z|Xl%8
try{ N.]8qzW
oSavedFile.write(b,nStart,nLen); =B\?(
n = nLen; hn-S$3')`
} ;rX4${h
catch(IOException e) <}ev Ow2
{ /T?['#:r-)
e.printStackTrace (); hikun2
} ji "*=i
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return n; 2neiUNT
} xGqZ8v`v
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} :mij%nQ>$
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/* jGt[[s
**SiteInfoBean.java _$\T;m>'A
*/ Ky+TgR
package NetFox; D_@^XS
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public class SiteInfoBean { ~o+u: ]
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private String sSiteURL; //Site's URL hod|o1C&
private String sFilePath; //Saved File's Path #8'%CUF*<8
private String sFileName; //Saved File's Name OHB!ec6W
private int nSplitter; //Count of Splited Downloading File oD.f/hi0|
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public SiteInfoBean() x`$4
{//nSplitter的缺省值为5 [p(Y|~
//default value of nSplitter is 5 :)+cI?\#
this("","","",5); Tsa&R:SE
} 9s}--_k?F2
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) |XQ!xFB
{ '1d-N[
sSiteURL= sURL; P/27+5(|
sFilePath = sPath; !=a8^CV
sFileName = sName; 9%4rO\q
this.nSplitter = nSpiltter; e|`&K"fnq
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