/* 4+46z|
**SiteFileFetch.java xh|NmZg
*/ _voU^-
package NetFox; 21ng94mC
import java.io.*; 0
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import java.net.*; &(&5ao)5
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public class SiteFileFetch extends Thread { ,xmL[Yk,
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SiteInfoBean siteInfoBean = null; //文件信息Bean S 2vjjS
long[] nStartPos; //开始位置 %z1y3I|`[t
long[] nEndPos; //结束位置 $;~
FileSplitterFetch[] fileSplitterFetch; //子线程对象 %4 9^S&
long nFileLength; //文件长度 l@C39VP
boolean bFirst = true; //是否第一次取文件 cl3@+v1
boolean bStop = false; //停止标志 C.su<B?
File tmpFile; //文件下载的临时信息 &IYSoA"Nz
DataOutputStream output; //输出到文件的输出流 f-]5ZhM'
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) q8 jI
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public SiteFileFetch(SiteInfoBean bean) throws IOException oMdqg4HUF
{ 2x3%*r$
siteInfoBean = bean; '1rHvz`B/"
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 1:{BC2P
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); =6Z$nc
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if(tmpFile.exists ()) #>)OLKP
{ ";vP77|m7R
bFirst = false;
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read_nPos(); oW7\T!f
} &4]~s:F
else #i6ZY^+ee
{ Iq/V[v
nStartPos = new long[bean.getNSplitter()]; *Y"j 0Yob
nEndPos = new long[bean.getNSplitter()]; AE?G+:B
} 2$S^3$k'
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} m~$S ]Wf
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public void run() ( q8uB
{ qC|$0
//获得文件长度 6,J:sm\
//分割文件 $<c;xDO&t
//实例FileSplitterFetch 0xZX%2E
//启动FileSplitterFetch线程 7R4xJ H
//等待子线程返回 \~ACWF7l
try{ XHX$Ur9
if(bFirst) y&F0IJ|`@M
{ (bT3
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nFileLength = getFileSize(); -h n~-Sy+
if(nFileLength == -1) ~]Md*F[4*e
{ RlW7l1h&
System.err.println("File Length is not known!"); A~Uqw8n$\
} i7 *cpNPO
else if(nFileLength == -2) |~V`Es +j
{ '5V#sq;Z
System.err.println("File is not access!"); estDW1i)
} Qx{[#[Da
else uW@o,S0:
{ w26x)(7
for(int i=0;i<nStartPos.length;i++) f*uD9l%/
{ XwerQwO=
nStartPos = (long)(i*(nFileLength/nStartPos.length)); )U$]J*LI
} !}[cY76_
for(int i=0;i<nEndPos.length-1;i++) ~sk{O%OI
{ O:^m#:[cE
nEndPos = nStartPos[i+1]; YY? }/r
} !X 8<;e}2
nEndPos[nEndPos.length-1] = nFileLength; ;R#:? r;t
} <;T$?J9
} {\87]xJ
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//启动子线程 h_w_OCC&2
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ;Xzay|
for(int i=0;i<nStartPos.length;i++) oJ<Wh @
{ ?M02|8-
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), UN,y/V
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Y$L>tFA
nStartPos,nEndPos,i); @1p,
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ,vN0Jpf}\8
fileSplitterFetch.start(); \q |n0>
} c2$&pZ
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), A&dNCB
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); MZ/PXY
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", `U~Y{f_!H
nEndPos = " + nFileLength); $AI0NM
// fileSplitterFetch[nPos.length-1].start(); bM%c*_$F7
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//等待子线程结束 W@:a3RJ
//int count = 0; K9BoIHo
//是否结束while循环 TAXl73j_CY
boolean breakWhile = false; 5[1#d\QR
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while(!bStop) 1|PmZPKq9n
{ /nX+*L}d/
write_nPos(); |>Xw"]b;
Utility.sleep(500); TYs#v/)I
breakWhile = true; REmD*gf
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for(int i=0;i<nStartPos.length;i++) wG&+*,}
{ HOb-q|w
if(!fileSplitterFetch.bDownOver) uy,ySBY
{ A{7N#-h_
breakWhile = false; ~6hG"t]:
break; 5xEk 7g.
} i N}BMd.U
} TF@HwF"#
if(breakWhile) {]a 6o[}u
break; R+s_uwS
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//count++; @c8s<9I]
//if(count>4) SwDUg}M~
// siteStop(); {mlJ E>~%
} `tCOe
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System.err.println("文件下载结束!"); }UzO_&Z#6
} ,u,]ab
catch(Exception e){e.printStackTrace ();} cZ"
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} 's]+.3">L1
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//获得文件长度 @QAyXwp
public long getFileSize()
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{ `R}D@
int nFileLength = -1; +njE
try{ oadlyqlw#
URL url = new URL(siteInfoBean.getSSiteURL()); =](c7HEQf
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !n`ogzOh
httpConnection.setRequestProperty("User-Agent","NetFox"); jH*+\:UP-
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int responseCode=httpConnection.getResponseCode(); PAe2hJ
if(responseCode>=400) #"M 'Cs
{ C/P,W>8
processErrorCode(responseCode); {C%/>e2-%
return -2; //-2 represent access is error S|A?z)I
} %@!Vx
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String sHeader; l|-TGjsX
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for(int i=1;;i++) MwxfTH"wi
{ Q<L.!%vu}
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ,EgIH%*g
//Utility.log(in.readLine()); {-rK:*yP'u
sHeader=httpConnection.getHeaderFieldKey(i); ];P^q`n=.
if(sHeader!=null) Ih}I`wY-
{ o8P 5C4y
if(sHeader.equals("Content-Length")) hfY
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{ ? OBe!NDf
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ^i{B8]2,
break; %J`;
} xDBEs*
} S,5>g07-`
else ^uW!=%D
break; qYFol#=%
} ?ng?>!
} 7"f$;CN?~
catch(IOException e){e.printStackTrace ();} y+RT[*bX5o
catch(Exception e){e.printStackTrace ();} VI%879Z\e
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Utility.log(nFileLength); o'Q)V
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return nFileLength; r^P}xGGK
} "F+
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//保存下载信息(文件指针位置) 66=6;77
private void write_nPos() E{r_CR+8
{ ,_T,B'a:
try{ A.vcE
output = new DataOutputStream(new FileOutputStream(tmpFile)); {KL<Hx2M
output.writeInt(nStartPos.length); &Ko}Pv
for(int i=0;i<nStartPos.length;i++) RR:m<9l
{ [pbX_
// output.writeLong(nPos); T\:3(+uK
output.writeLong(fileSplitterFetch.nStartPos); CF^7 {g(y_
output.writeLong(fileSplitterFetch.nEndPos); -8tWc]c
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} l)z15e5X
output.close(); Q8M&nf
} %^"T z,f
catch(IOException e){e.printStackTrace ();} IxCEE5+`%
catch(Exception e){e.printStackTrace ();} t4?g_$>
} lN+NhPF
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//读取保存的下载信息(文件指针位置) 9B'l+nP
private void read_nPos() b]s=Uv#)
{ mW 5L;>
try{ w;'
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DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); %_1~z[Dv
int nCount = input.readInt(); /-$`GT?l
nStartPos = new long[nCount]; j:|60hDz^
nEndPos = new long[nCount]; mf@YmKbp
for(int i=0;i<nStartPos.length;i++) UL[4sv6\9
{ ~`hI|i<]
nStartPos = input.readLong(); R*TCoEKO
nEndPos = input.readLong(); =rgWOn8
} #'<I!G
input.close(); )+ Wr- Yay
} 1l\O9D +$
catch(IOException e){e.printStackTrace ();} nl5K1!1
catch(Exception e){e.printStackTrace ();} j&fr4t3
} |1 is!leP
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private void processErrorCode(int nErrorCode) ;0xCrE{l"
{ SBjtg@:G0n
System.err.println("Error Code : " + nErrorCode); HtEjM|zj
}
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//停止文件下载 qB]z"Hfq,
public void siteStop() 1elcP`N1
{ FTCp3g
bStop = true; GQ|kcY=
for(int i=0;i<nStartPos.length;i++) w}NgFrL
fileSplitterFetch.splitterStop(); N,'JQch},8
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} u{H,i(mx?
} M=o,Sav5*
//负责部分文件的抓取 PBn(k>=+
**FileSplitterFetch.java 0 nWV1)Q0=
*/ B[4y(Im
package NetFox; ;
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import java.io.*; tt J,rM
import java.net.*; &%qD Som3
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public class FileSplitterFetch extends Thread { tx5_e[
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String sURL; //File URL Q=PaTh
long nStartPos; //File Snippet Start Position U"m!f*a
long nEndPos; //File Snippet End Position kP;:s
int nThreadID; //Thread's ID (=
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boolean bDownOver = false; //Downing is over XZ|"7a s
boolean bStop = false; //Stop identical f!LZT! y
FileAccessI fileAccessI = null; //File Access interface crgYr$@s?
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 5)$U<^uy
{ /=e[(5X|O
this.sURL = sURL; sWavxh8A
this.nStartPos = nStart; ziH2<@
this.nEndPos = nEnd; j~Gu;%tq
nThreadID = id; bq(*r:`"
fileAccessI = new FileAccessI(sName,nStartPos);//定位 g=U?{<8.m
} X'?v8\mPK
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public void run() [0 &Lvx
{ &/JnAfmYqt
while(nStartPos < nEndPos && !bStop) }(o/+H4
{ GV[%P
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try{ 3gabk/
URL url = new URL(sURL); W^=89I4]
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); $\^]MxI
httpConnection.setRequestProperty("User-Agent","NetFox"); V'mpl
String sProperty = "bytes="+nStartPos+"-"; 2{V|
httpConnection.setRequestProperty("RANGE",sProperty); e#nTp b
Utility.log(sProperty); 3&y
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InputStream input = httpConnection.getInputStream(); ItaJgtsV
//logResponseHead(httpConnection); B:mlBSH
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byte[] b = new byte[1024]; q!ZmF1sU
int nRead; ]#:xl}'LS
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) w
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{ 1|.
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nStartPos += fileAccessI.write(b,0,nRead); r?X^*o9
//if(nThreadID == 1) /Hx0=I
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); w`7l;7[
} c=b\9!hr_E
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Utility.log("Thread " + nThreadID + " is over!"); "mH^Owai
bDownOver = true; CqX%V":2
//nPos = fileAccessI.write (b,0,nRead); aZ0H)
} \!^o<$s.G
catch(Exception e){e.printStackTrace ();} Aj`4uFhiL
} C|lMXp\*
} unX^ MPpw
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//打印回应的头信息 (w^&NU'e
public void logResponseHead(HttpURLConnection con) `q@~78`
{ EV(/@kN2
for(int i=1;;i++) /Z@.;M
{ cq=R
String header=con.getHeaderFieldKey(i); 4dok/ +Ec
if(header!=null) Qdn:4yk
//responseHeaders.put(header,httpConnection.getHeaderField(header)); -qEr-[z
Utility.log(header+" : "+con.getHeaderField(header)); _0f[.vN
else <n:?WP~U
break; \c\=S
} ueg X
} iB,*X[}EqG
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public void splitterStop() dog,vUu
{ 7,4x7!
bStop = true; Rd$<R
} <'B^z0I,
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} [<`+9R
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/* 'oEmbk8Hg
**FileAccess.java $+);!?^|:
*//文件访问(定位,写) >@%!r
package NetFox; x('yBf
import java.io.*; l^"G \ZVI
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public class FileAccessI implements Serializable{ Bx qCV%9o
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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 hf-S6PEsM
RandomAccessFile oSavedFile; ,]Ma, 2
long nPos; dkLR
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public FileAccessI() throws IOException p(8\w-6
{ :Rn9rdX
this("",0); ;uDFd04w
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} ?`XKaD!
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public FileAccessI(String sName,long nPos) throws IOException $d=lDN
{ zW _'sC
oSavedFile = new RandomAccessFile(sName,"rw"); YH>n{o;-
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this.nPos = nPos; FN
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oSavedFile.seek(nPos); gkdjH8(2
} o(zg_!P
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public synchronized int write(byte[] b,int nStart,int nLen) vK C>t95
{ 4kM<L}J#
int n = -1; 'yNp J'
try{ GND[f}
oSavedFile.write(b,nStart,nLen); g;h&Xkp
n = nLen; 9T1G/0k-
} 6>Cubb>
catch(IOException e) t|m3b~Oyv
{ r:cUAe7#
e.printStackTrace (); 4HJrR^
} Qi61(lK
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return n; "mf;k^sqS
} Xy{+=UY
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} }NXESZYoi
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/* D/WS
**SiteInfoBean.java {JgN^R<5<f
*/ OOCeZ3yF(
package NetFox; kWd'gftQ
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public class SiteInfoBean { z#4g,)ZX
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private String sSiteURL; //Site's URL PwW @I~@>
private String sFilePath; //Saved File's Path 'gGB-=yvbO
private String sFileName; //Saved File's Name bv/b<N@4?$
private int nSplitter; //Count of Splited Downloading File wO#+8js
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public SiteInfoBean() n1Jz49[r
{//nSplitter的缺省值为5 U6Ak"
//default value of nSplitter is 5 ThxrhQ
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this("","","",5); l+6(|"md
} (=j!P*
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 5qy}~dQ
{ 3o>t~Sfi
sSiteURL= sURL; eW0=m:6
sFilePath = sPath; /Hmo!"W`
sFileName = sName; T8-$[
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this.nSplitter = nSpiltter; Qx;A; n!lw
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} y~7lug
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public String getSSiteURL() WFP\;(YV
{ h86={@Le
return sSiteURL; YHYB.H)
} {O)&5
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public void setSSiteURL(String value) 4Z}{hc\J
{ s? k[_|)!
sSiteURL = value; "44?n <1
} &J$5+"/;X
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public String getSFilePath() )\vHIXnfJ1
{ {R;M`EU>
return sFilePath; yU,xcq~l
} p'~5[JR:
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public void setSFilePath(String value) <R>z;2c
{ 070IBAk}_
sFilePath = value; )1Nnn
} RFY!o<
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public String getSFileName() E]U0CwFtr
{ `Xdxg\|
return sFileName; KVxb"|[
} /T)n5X
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public void setSFileName(String value) Z4ioXl
{ k &iDJt
sFileName = value; MdZgS#`
} dM{~Ubb
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public int getNSplitter() aLt{X)?
{ }Xj_Y]T
return nSplitter; d~-p;i
} ROS"VV<
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public void setNSplitter(int nCount) h6y4Ii
{ f\|?_k]
nSplitter = nCount; {@__%=`CCS
} K#hY bDm
} qO{ ZZ*
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/* ir:~*|
**Utility.java P 4*MV
*/ wI@I(r~g
package NetFox; ]^jdO# #M
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public class Utility { S?\hbM]V-o
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public Utility() r/hyW6e_
{ cO+Xzd;838
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} ikN!ut
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//线程睡眠 $?J+dB
public static void sleep(int nSecond) igBrmaY'
{ o 7W Kh=
try{ 5b1uD>,;y
Thread.sleep(nSecond); ITIj=!F*
} `1bX.7K43
catch(Exception e) bro
{ h^+C)6(58n
e.printStackTrace (); k\sM;bCv7
} Nv?-*&