/* `eWcp^|
**SiteFileFetch.java |Hm'.-
*/ iXm||?Rnx
package NetFox; ^0|NmMJ]
import java.io.*; 7
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import java.net.*; NslA/"*
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public class SiteFileFetch extends Thread { 9$,gTU_a
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SiteInfoBean siteInfoBean = null; //文件信息Bean V0 F30rK
long[] nStartPos; //开始位置 _o?(t\B9{
long[] nEndPos; //结束位置 c9uT`h
FileSplitterFetch[] fileSplitterFetch; //子线程对象 !~N4}!X3du
long nFileLength; //文件长度 w~U`+2a3
boolean bFirst = true; //是否第一次取文件 rc$!$~|I3Z
boolean bStop = false; //停止标志 mVK 9NK
File tmpFile; //文件下载的临时信息 v|I5Gz$qpa
DataOutputStream output; //输出到文件的输出流 k4$q|x7+%
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) <VU4rk^=
public SiteFileFetch(SiteInfoBean bean) throws IOException y,&M\3A
{ hcgc
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siteInfoBean = bean; o1WidJ"
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); yOK])&c
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); =]QH78\3
if(tmpFile.exists ()) 7Hl_[n|
{ ^CPfo/!
bFirst = false; i"]8Zw_D
read_nPos(); K~8tN,~&
}
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else @6co\.bv
{ @5jG
nStartPos = new long[bean.getNSplitter()]; B#6pQp$
nEndPos = new long[bean.getNSplitter()]; G\+nWvV7
} yJ8}*Gj&
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} 1 j12Qn@]
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public void run() (Q5@MfK`
{ T#n1@FgC
//获得文件长度 3EVC8ue
//分割文件 Ke?gz:9j
//实例FileSplitterFetch 0BCGJFZ{
//启动FileSplitterFetch线程 OJsd[l3xR
//等待子线程返回 <i'u96
try{ ),]2`w&k
if(bFirst) N+M&d3H`
{ n<:d%&^n
nFileLength = getFileSize(); vaRwhE:
if(nFileLength == -1) "'!%};
{ @qPyrgy
System.err.println("File Length is not known!");
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} Nr24[e
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else if(nFileLength == -2) sk
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{ {?/8jCVd
System.err.println("File is not access!"); `GQiB]Z
} ,![Du::1
else ZJ9Jf2 c
{ ,B %fjcn
for(int i=0;i<nStartPos.length;i++) t\pK`DM-[
{ C5+`<
nStartPos = (long)(i*(nFileLength/nStartPos.length)); So=nB} b[?
} oKYhE
for(int i=0;i<nEndPos.length-1;i++) aw/7Z`
{ @mx$sNDkL
nEndPos = nStartPos[i+1]; \$'m^tVU
} 7y)=#ZG'R
nEndPos[nEndPos.length-1] = nFileLength; x$n~f:1Y
} 7<:Wq=e!r
} 3_MS'&M
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//启动子线程 u\XkXS`
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 8pPC 9ew\=
for(int i=0;i<nStartPos.length;i++) ^.#X<8hr
{
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fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9Yl8ndP^E
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), /S]:dDY9K
nStartPos,nEndPos,i); [vWkAJ'K
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); `pi-zE)
fileSplitterFetch.start(); t0bhXFaiE
} abo>_"9-
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), y|6@-:B.
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); b0YiQjS6>
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", E69:bQ94u
nEndPos = " + nFileLength); PZuq'^p
// fileSplitterFetch[nPos.length-1].start(); i
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//等待子线程结束 *:\:5*SY
//int count = 0; GsIwY {d
//是否结束while循环 DB`$Ru@
boolean breakWhile = false; 9q1HSJ1)
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while(!bStop) ]$~Fzs
{ _ktK+8*6`
write_nPos(); zb;(?!Bd#
Utility.sleep(500); Q(|PZng
breakWhile = true; =#i4MXRZ{
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for(int i=0;i<nStartPos.length;i++) !%c{+]g
{ o_Jn_3=
if(!fileSplitterFetch.bDownOver) [DZqCo
{ b0@>xT
breakWhile = false; b4Z`y8=
break; Ot`LZ"H:
} F qeV3N
} {f+N]Oo*
if(breakWhile) v2hZq-q
break; *jM_ wwG
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//count++; b
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//if(count>4) M{?zvq?d
// siteStop(); C.J`8@a]?
} Oj4v#GK]
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System.err.println("文件下载结束!"); o84UFhm
} 3CR@'
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catch(Exception e){e.printStackTrace ();} [%@2o<
} 4_PCqEp)
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//获得文件长度 Deg!<[Nw
public long getFileSize() aUH\Ee^M:R
{ B7!<{i
int nFileLength = -1; _u&>&,:q
try{ /g_9m
URL url = new URL(siteInfoBean.getSSiteURL()); %#~((m1
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); X E|B)Q(
httpConnection.setRequestProperty("User-Agent","NetFox"); ZgV~W#t
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int responseCode=httpConnection.getResponseCode(); yND"bF9
if(responseCode>=400) %35L=d[
{ D.'h?^kA
processErrorCode(responseCode); JD6aiI!Su
return -2; //-2 represent access is error ]N*L7AVl
} E{tx/$f
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String sHeader; 1/B]TT
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for(int i=1;;i++) <W>++< -
{ *7ZGq(O
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); dj'm, k
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//Utility.log(in.readLine()); GCDwWCxh
sHeader=httpConnection.getHeaderFieldKey(i); Sw~(uH_l
if(sHeader!=null)
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{ |%
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if(sHeader.equals("Content-Length")) X1+wX`f
{ J/2j;,8D
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); :Sr?6FPc
break; 96d~~2p
} 1y
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} /~De2mq1
else bEm7QgV{X
break; *?/tO,
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} BZK2$0
} C5xag#Z1
catch(IOException e){e.printStackTrace ();} zh\p
catch(Exception e){e.printStackTrace ();} :0$a.8Y\++
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Utility.log(nFileLength); ,57$N&w
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return nFileLength; \v+u;6cx_
} rQ/,XH
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//保存下载信息(文件指针位置) bLzs?eos
private void write_nPos() &-%>qB|*
{ 1B|8ZmFJj
try{ Z$p0&~
output = new DataOutputStream(new FileOutputStream(tmpFile)); bB!#:j>(v
output.writeInt(nStartPos.length); 8)N@qUV
for(int i=0;i<nStartPos.length;i++) a5@z:i
{ >nzu],U
// output.writeLong(nPos); UiH!Dl}<
output.writeLong(fileSplitterFetch.nStartPos); oH^(qZ8W
output.writeLong(fileSplitterFetch.nEndPos); %Y]=1BRk}
} (D<(6?
output.close(); #2RiLht
} /kgeV4]zR
catch(IOException e){e.printStackTrace ();} G O{.9_2
catch(Exception e){e.printStackTrace ();} *wuqa)q2
} W+Xz$j/u
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//读取保存的下载信息(文件指针位置) {`(>O"_[Q
private void read_nPos() {o0qUX>[
{ pd3,pQ
try{ Y4E/?37j
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); $<nCXVqL,
int nCount = input.readInt();
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nStartPos = new long[nCount]; R x7X_A}
nEndPos = new long[nCount]; V8WFQdXc
for(int i=0;i<nStartPos.length;i++) uI~s8{0T6
{ Yw'NX5#)g
nStartPos = input.readLong(); ).5RPAP
nEndPos = input.readLong(); qnM|w~G
} :`\)
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input.close(); BecPT
} :u6JjW[a)
catch(IOException e){e.printStackTrace ();} PRkSQ4
catch(Exception e){e.printStackTrace ();} bDnZcf
} MZV_5i@:
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private void processErrorCode(int nErrorCode) %c|UmKKi
{ b0v:12q
System.err.println("Error Code : " + nErrorCode); =w$tvo/
} /J3ZL[o?Q
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//停止文件下载 E<E3&;qD
public void siteStop() HDVW0QaMu
{ 0v)bA}k
bStop = true; %zBCq"y
for(int i=0;i<nStartPos.length;i++) JhHWu<
fileSplitterFetch.splitterStop(); 7 <9yH:1
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} >&,[H:Z
} 4dawg8K`9
//负责部分文件的抓取 #3$\Iu
**FileSplitterFetch.java
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*/ -d+aV1n
package NetFox; oVvc?P
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import java.io.*; 2)X4y"l
import java.net.*; \Q~8?p+
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public class FileSplitterFetch extends Thread { {ZU1x C
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String sURL; //File URL 5U`ZbG
long nStartPos; //File Snippet Start Position /./"x~@
long nEndPos; //File Snippet End Position [AU
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int nThreadID; //Thread's ID j.e0;!
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boolean bDownOver = false; //Downing is over uo\ .7[1
boolean bStop = false; //Stop identical F&RgT1*
FileAccessI fileAccessI = null; //File Access interface L<^j"!0
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException }`(N:p
{ ;0rGiWC#
this.sURL = sURL; ;-P)m
this.nStartPos = nStart; ,`D~py,
this.nEndPos = nEnd; t.T
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nThreadID = id; H}hFFI)#Oo
fileAccessI = new FileAccessI(sName,nStartPos);//定位 3_Cp%~Gi-_
} !Ucjax~
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public void run() O.aG[wm8
{ kOOGw:/
while(nStartPos < nEndPos && !bStop) -l~Z0U>^
{ Vj<:GRNQ,d
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try{ 6!x&LoM
URL url = new URL(sURL); {]_uMg#!
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;~fT,7qBah
httpConnection.setRequestProperty("User-Agent","NetFox"); [.se|]t7X
String sProperty = "bytes="+nStartPos+"-"; Od+6 -J
httpConnection.setRequestProperty("RANGE",sProperty); PZxAH9 S?
Utility.log(sProperty); <+MyZM(z>
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InputStream input = httpConnection.getInputStream(); U,#yqER'r
//logResponseHead(httpConnection); o#) {1<0vg
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byte[] b = new byte[1024]; T|J9cgtS
int nRead; pl@O
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while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 2M#M"LHo
{ OsBo+fwT
nStartPos += fileAccessI.write(b,0,nRead); <,o>Wx*1C
//if(nThreadID == 1) Z;9>S=w!
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^b: (jI*l
} ;!:U((wv
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Utility.log("Thread " + nThreadID + " is over!"); ojYbR<jn9
bDownOver = true; JB!:JML
//nPos = fileAccessI.write (b,0,nRead); sn7AR88M;
} |*Z$E$k:
catch(Exception e){e.printStackTrace ();} Lg8nj< TF
} zp\8_ U@
} |,9JNm$
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//打印回应的头信息 5T sU Qc
public void logResponseHead(HttpURLConnection con) J+rCxn?;g
{ V5+SWXZ
for(int i=1;;i++) "$s~SIUB
{ A-:O`RK
String header=con.getHeaderFieldKey(i); 5F`;yh+e
if(header!=null) o FjIA!
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ;&H4u)
Utility.log(header+" : "+con.getHeaderField(header)); z/i+EE
else 21k5I #U
break; r0p w_j
} YK|bXSA[
} [MuEoWrq(}
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public void splitterStop() 8XbA'% o
{ @lJzr3}WZ
bStop = true; {vAE:W.s
} $w"$r$K9K
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} hig2
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/* KNH1#30 K
**FileAccess.java v<Bynd-
*//文件访问(定位,写) ECv)v
package NetFox; l5L.5$N
import java.io.*; E=){K
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public class FileAccessI implements Serializable{ cuOvN"nuNj
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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 =8U&[F
RandomAccessFile oSavedFile; R<B7K?SxV~
long nPos; 7GDHz.IX
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public FileAccessI() throws IOException JN7k 2]{
{ !^Q.VYY
this("",0); 1q;#VS/D;H
} @A)R_p
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public FileAccessI(String sName,long nPos) throws IOException )BRKZQN
{ j0@[Br %7
oSavedFile = new RandomAccessFile(sName,"rw"); RT%pDym\
this.nPos = nPos; Ivb4P`{
oSavedFile.seek(nPos); b(9FZ]7S
} _{M\Bs2<
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public synchronized int write(byte[] b,int nStart,int nLen) 5xii(\lC
{
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int n = -1; "s\L~R.&
try{ 3"F`ZJ]=
oSavedFile.write(b,nStart,nLen); ak:c rrkx
n = nLen; 6Zn
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} 4b:s<$TZ
catch(IOException e) 2B,] -Mu)
{ F{ELSKcp.
e.printStackTrace (); ;'-olW~
} D-,L&R!`
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return n; : }`-B0
} -,["c9'3
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} ]THPSw_y8
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/* @BNEiOAZ#
**SiteInfoBean.java p019)X|vx
*/ r7Ya\0gU
package NetFox; GtwT
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public class SiteInfoBean { JsotOic%
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private String sSiteURL; //Site's URL HI@syFaJM
private String sFilePath; //Saved File's Path DLCkM*'
private String sFileName; //Saved File's Name b"TjGE
private int nSplitter; //Count of Splited Downloading File {aM<{_v
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public SiteInfoBean() 6)BR+U
{//nSplitter的缺省值为5 MCdx?m3]
//default value of nSplitter is 5 p6vKoI#T
this("","","",5); /y>>JxAEb
} pAk/Qxl3eo
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) G}9=)
{ n#iwb0-
sSiteURL= sURL; Oez>X=Xf
sFilePath = sPath; Ye.r%i&