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**SiteFileFetch.java 9e :E% 2
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package NetFox; [I4FU7mpH
import java.io.*; I}v'n{5(
import java.net.*; KwQO,($,]
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public class SiteFileFetch extends Thread { 1I^Sv
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SiteInfoBean siteInfoBean = null; //文件信息Bean ^Q :K$!
long[] nStartPos; //开始位置 HIa$0g0J
long[] nEndPos; //结束位置 F<(xz=
FileSplitterFetch[] fileSplitterFetch; //子线程对象 :M[E-j;
long nFileLength; //文件长度 f|^f^Hu:{
boolean bFirst = true; //是否第一次取文件 >6DY3\
boolean bStop = false; //停止标志 |b3/63Ri-0
File tmpFile; //文件下载的临时信息 ia_8$>xW+
DataOutputStream output; //输出到文件的输出流 ]VYl Eqe
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) }t-r:R$,
public SiteFileFetch(SiteInfoBean bean) throws IOException "\=_- `
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siteInfoBean = bean; gq@."wHU
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); `(a^=e5
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); M{4_BQ4$
if(tmpFile.exists ()) Nb9pdkf0
{ y14@9<~9
bFirst = false; |}|;OG
read_nPos(); Elq8WtS
} j{Fo 6##
else N+V-V-PVk
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nStartPos = new long[bean.getNSplitter()]; tj&A@\/
nEndPos = new long[bean.getNSplitter()]; -oo=IUk
} I^|bQ3sor
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} z} \9/`
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public void run() ,{50zx2
{ 9$ S,P|
//获得文件长度 >dl!Ep
//分割文件 6J*`<k/S
//实例FileSplitterFetch i=a LC*@
//启动FileSplitterFetch线程 GT.^u#r
//等待子线程返回 YC_^jRB8n
try{ WI,=?~-
if(bFirst) PS22$_}
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nFileLength = getFileSize(); bsry([N>w
if(nFileLength == -1) |@ HdTGD
{ f.$o|R=v
System.err.println("File Length is not known!"); Jq#Cn+zW
} [s2V-'2
else if(nFileLength == -2) @^%_ir(
{ f tPw6
System.err.println("File is not access!"); `[\phv
} h'x~"k1
else zFr} $
{ /<$"c"UQ
for(int i=0;i<nStartPos.length;i++) >i%w'uU
{ WLLv a<{
nStartPos = (long)(i*(nFileLength/nStartPos.length)); VWv0\:,G
} }$1;<
for(int i=0;i<nEndPos.length-1;i++) (O2HB-<rY
{ [BBKj)IK
nEndPos = nStartPos[i+1]; YoJ'=z,e
} BfT,
nEndPos[nEndPos.length-1] = nFileLength; q4iD59yd)S
} tJPRR_nZv
} #L0I+ K,K\
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//启动子线程 ;x^,t@ xge
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; wWU_?Dr_~
for(int i=0;i<nStartPos.length;i++) X);Zm7
{ IJY5wP1"
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), zD;]
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Q;O)>K
nStartPos,nEndPos,i); AsLjU#jn
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); `;CU[Ps?]
fileSplitterFetch.start(); \{zAX~k6
} \_AEuz3
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }~r6>7I
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); BQ&q<6Tk
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ",
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nEndPos = " + nFileLength); ~hslLUE
// fileSplitterFetch[nPos.length-1].start(); N"RYM~c7
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//等待子线程结束 P`dHR;Y0
//int count = 0; 4F,Ql"ae(
//是否结束while循环 mv*T=N8fC
boolean breakWhile = false; 7EP|X.
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while(!bStop) ^Lmc%y
{ zk'K.!
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write_nPos(); <yI,cM<c
Utility.sleep(500); pJIE@Q|hi
breakWhile = true; `m3QT3B
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for(int i=0;i<nStartPos.length;i++) O| J`~Lk
{ #;LMtDaL
if(!fileSplitterFetch.bDownOver) 8$v zpu
{ k5t^s
breakWhile = false;
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break; ?QSx8d
} L;M^>{>
} afF+*\xXN
if(breakWhile)
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break; 8| e$
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//count++; 0L0Jc,(F+
//if(count>4) ;eW'}&|LV
// siteStop(); )'!ml
} K@jSr*\'
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System.err.println("文件下载结束!"); m c\ C
} Z?(4%U5z
catch(Exception e){e.printStackTrace ();} !jAWNK6
} S@c\|
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//获得文件长度 VPM|Rj:d
public long getFileSize() ]D{c4)\7C|
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int nFileLength = -1; Kunle~Ro
try{ niYz9YX
URL url = new URL(siteInfoBean.getSSiteURL()); }2Cd1RnS
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); W1?!iE~tO
httpConnection.setRequestProperty("User-Agent","NetFox"); U6juS/
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int responseCode=httpConnection.getResponseCode(); Mu'^OX82
if(responseCode>=400) Bw3F7W~l
{ V;iL[
processErrorCode(responseCode); qSEB}1
return -2; //-2 represent access is error O1?B{F/ e
} [|a(
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String sHeader; [i(Cl}
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for(int i=1;;i++) 0 W~.WkD
{ 0rk u4T
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); e1%rVQ(v
//Utility.log(in.readLine()); ;'Z,[ a
sHeader=httpConnection.getHeaderFieldKey(i); ?trt4Tbe/
if(sHeader!=null) m,kvEQ3
{ @5dBb+0J
if(sHeader.equals("Content-Length")) A1=$kzw{UH
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nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); &j
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break; CU7iva
} Y`[HjS,
} pE YrmC
else T^-H_|/M
break; H8=vQy
} qU
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} hz>yv@1
catch(IOException e){e.printStackTrace ();} 0N}
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catch(Exception e){e.printStackTrace ();} Cx1Sh#9
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Utility.log(nFileLength); 2C
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return nFileLength; D=pI'5&
} iA{chQBr
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//保存下载信息(文件指针位置) 3<1HqU
private void write_nPos() G3^n_]Jb
{ NiJ?no
try{ 6r-<XNv)0
output = new DataOutputStream(new FileOutputStream(tmpFile)); F6neG~Y
output.writeInt(nStartPos.length); %lqG* dRx0
for(int i=0;i<nStartPos.length;i++) 4)>\rqF+v
{ zWR*g/i
// output.writeLong(nPos); VHXR)}
output.writeLong(fileSplitterFetch.nStartPos); "351s3ff
output.writeLong(fileSplitterFetch.nEndPos); q5K/+N^2?
} `- uZv
output.close(); #D*J5k>2
} e[VJ0 A=
catch(IOException e){e.printStackTrace ();} L^ jC&
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catch(Exception e){e.printStackTrace ();} {u[K
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} /EAQ.vxI
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//读取保存的下载信息(文件指针位置) %~v76;H<
private void read_nPos() Ul~}@^m]4}
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try{
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DataInputStream input = new DataInputStream(new FileInputStream(tmpFile));
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int nCount = input.readInt(); Pt)}HF|u
nStartPos = new long[nCount]; 1_E3DXe
nEndPos = new long[nCount]; snk{u/0Xm
for(int i=0;i<nStartPos.length;i++) %?{2uMfq-f
{ YI(OrR;V
nStartPos = input.readLong(); |(8Hk@\CT>
nEndPos = input.readLong(); BKlc{=
} 0o'ML""j
input.close(); $!3t$-TSD
} EpS8,[w
catch(IOException e){e.printStackTrace ();} =rtA{g$)+
catch(Exception e){e.printStackTrace ();} +H^V},dBp!
} X72X:"
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private void processErrorCode(int nErrorCode) s$y#Ufz
{ Cot\i\]jv
System.err.println("Error Code : " + nErrorCode); PHL@1K{)
} J,M5<s[Xqt
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//停止文件下载 r#w_=h)
public void siteStop() Xq)%w#l5?
{ *L8HC8IbH
bStop = true; u#k6v\/
for(int i=0;i<nStartPos.length;i++) GpQF* x
fileSplitterFetch.splitterStop(); &-)Y[#\J
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} %[CM;|?B4
} *t*&Q /W
//负责部分文件的抓取 "^e?E:( 3
**FileSplitterFetch.java "}aM*(l+\
*/ B]}V$*$\?
package NetFox; Z!l!3(<G.f
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import java.io.*; `-YSFQ~O,
import java.net.*; /g7?,/vnZ
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public class FileSplitterFetch extends Thread { #]/T9:
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String sURL; //File URL * CGdfdxW
long nStartPos; //File Snippet Start Position ]c=1-Rl
long nEndPos; //File Snippet End Position D
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int nThreadID; //Thread's ID 17 iq
boolean bDownOver = false; //Downing is over ~*]`XL.-
boolean bStop = false; //Stop identical z(68^-V=:
FileAccessI fileAccessI = null; //File Access interface xyWdzc](p
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ]lYEJ`
{ 5kNs@FP
this.sURL = sURL; BtApl)q#
this.nStartPos = nStart; Z*3}L
this.nEndPos = nEnd; ?^5*[H
nThreadID = id; ~y^lNgujO
fileAccessI = new FileAccessI(sName,nStartPos);//定位 &bK$!8Z
} JLn<,Gn)<\
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public void run() *uM*)6O 3
{ VjMuU"++@
while(nStartPos < nEndPos && !bStop) PdBhX
{ B;_3IHMO
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try{ ^ w1R"qE"m
URL url = new URL(sURL); Pk_{{Z(1o
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3mz>Y*^?0
httpConnection.setRequestProperty("User-Agent","NetFox"); 'PbA/MN
String sProperty = "bytes="+nStartPos+"-"; :[03upyS
httpConnection.setRequestProperty("RANGE",sProperty); Rx-i.Et Z
Utility.log(sProperty); ~ riw7"
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InputStream input = httpConnection.getInputStream(); 4=:eGlU93U
//logResponseHead(httpConnection); dig76D_[e
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byte[] b = new byte[1024]; 3s`3}DKK
int nRead; ob
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while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) k<qH<<r*
{ ^u,x~nPXg
nStartPos += fileAccessI.write(b,0,nRead); Or>[_3
//if(nThreadID == 1) "ukbqdKD
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); E1_4\S*z
} iK:]Q8b
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Utility.log("Thread " + nThreadID + " is over!"); ]Jqe)o
bDownOver = true; Z.JTq~`I
//nPos = fileAccessI.write (b,0,nRead); l si8?91
} .#|pje^
catch(Exception e){e.printStackTrace ();} k#[s)Ja?s
} JY16|ia
} `_)dEu
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//打印回应的头信息 rgY~8PY"
public void logResponseHead(HttpURLConnection con) ~]W8NaQB(
{ 6B{Awm@v}X
for(int i=1;;i++) $ 1ZY
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{ $n"Llw&)
String header=con.getHeaderFieldKey(i); CG;D (AWR;
if(header!=null) eGil`:JY"
//responseHeaders.put(header,httpConnection.getHeaderField(header)); h@d
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Utility.log(header+" : "+con.getHeaderField(header)); a=dN.OB}F7
else |?kH]Trr
break; 8 Hn{CJ~'
} u'p J9>sC
} -C+vmY*@
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public void splitterStop() !TFVBK
{ kn\>ZgU
bStop = true; b'YbHUyu
} x7?{*w&r
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} tDo0Q/`
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/*
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**FileAccess.java jo~Pr
*//文件访问(定位,写) F`u~Jx8.*
package NetFox; %`'VXR?`h=
import java.io.*; _f`m/l
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public class FileAccessI implements Serializable{ ZE^de(Fm
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ~CA+'e%~~
RandomAccessFile oSavedFile; K^bn4Nr
long nPos; k$UBZ,=iC
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public FileAccessI() throws IOException ect?9S[!y
{ <_![~n$H
this("",0); EB#z\
} =%L^!//c
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public FileAccessI(String sName,long nPos) throws IOException <Yc:,CU
{ G\Me%{b#
oSavedFile = new RandomAccessFile(sName,"rw"); 1 .M?Hp9i
this.nPos = nPos; nTAsy0p]
oSavedFile.seek(nPos); pqe**`z@y
} pGIeW}2'9
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public synchronized int write(byte[] b,int nStart,int nLen) ,J|};s+
{ HZT;7<
int n = -1; {x8`gP\H
try{ +K?h]v]%
oSavedFile.write(b,nStart,nLen); F!xK#~e
n = nLen; A-W7!0
} <