📄 用c语言编写一个网络蜘蛛来搜索网上出现的电子邮件地址.mht
字号:
*/<BR> fd_set writefds;<BR> struct =
timeval=20
tival;<BR> int retry =3D 0;<BR> FILE * =
localfp =3D=20
NULL;<BR><BR> i=3D0; j =3D=20
=
0;<BR>__ReCeive:<BR> FD_ZERO(&writefds);<BR> ti=
val.tv_sec=20
=3D 10;<BR> tival.tv_usec =3D =
0;<BR> if(sockfd=20
> 0) FD_SET(sockfd, &writefds);<BR> else=20
{fprintf(stderr, "\n\tError, socket is negative!\n");=20
exit(0);}<BR><BR> ret =3D select(sockfd + 1, =
&writefds,=20
NULL, NULL, &tival);<BR> if(ret =3D=3D0 ) =
{<BR> =20
if(retry++ < 10) goto=20
__ReCeive;<BR> }<BR> if(ret <=3D 0) =
{fprintf(stderr, "\n\tError while receiving!\n");=20
exit(0);}<BR><BR> if(FD_ISSET(sockfd,=20
&writefds)) {<BR> =
memset(buffer, 0,=20
1024);<BR> memset(httpheader, 0, =
1024);<BR> =20
if((localfp =3D fopen(NodeCurr->file, "w")) =3D=3D =
NULL)=20
{if(DEBUG) fprintf(stderr, "create file '%s' error\n",=20
NodeCurr->file); return;}<BR> /* receive =
data from=20
web server */<BR> =20
while((nbytes=3Dread(sockfd,buffer,1))=3D=3D1)<BR> =
=20
{<BR> if(i < 4) { /* =
=BB=F1=C8=A1 HTTP=20
=CF=FB=CF=A2=CD=B7 */<BR> =
if(buffer[0] =3D=3D '\r'=20
|| buffer[0] =3D=3D '\n') i++;<BR> =
=20
else i =3D 0;<BR> =20
memcpy(httpheader + j, buffer, 1); =
j++;<BR> =20
}<BR> =
else {=20
/* =BB=F1=C8=A1 HTTP =CF=FB=CF=A2=CC=E5 */<BR> =
=20
fprintf(localfp, "%c", buffer[0]); /* =
print=20
content on the screen */<BR> =20
//fprintf(stdout, "%c", buffer[0]); /* =
print=20
content on the screen */<BR> =20
i++;<BR> =
}<BR> =20
}<BR> =20
=
fclose(localfp);<BR> }<BR>}<BR><BR>/**************************=
************************************<BR>=B9=A6=C4=DC=A3=BA=D6=B4=D0=D0=D2=
=BB=B4=CE=20
HTTP=20
=
=C7=EB=C7=F3<BR>*********************************************************=
******/<BR>void=20
DoOnce() { /* send and receive =
*/<BR> ConnectWeb(); /*=20
connect to the web server */<BR><BR> /* send a =
request=20
*/<BR> SendRequest();<BR><BR> /* =
receive a=20
response message from web server=20
=
*/<BR> ReceiveResponse();<BR><BR> close(sockfd);=20
/* because HTTP protocol do something one connection, so I =
can close=20
it after receiving=20
=
*/<BR>}<BR><BR>/*********************************************************=
*****<BR>=B9=A6=C4=DC=A3=BA=D6=B4=D0=D0=20
HTTP=20
=
=C7=EB=C7=F3<BR>*********************************************************=
******/<BR>void=20
DoneWithList(int flag) {<BR> if(flag) =
fprintf(stdout,=20
"\tRequest.%d is:\n%s", ++reqn,=20
=
request);<BR><BR> DoOnce();<BR><BR> if(flag)=20
fprintf(stdout, "\n\tThe following is the response =
header:\n%s",=20
=
httpheader);<BR>}<BR><BR>/***********************************************=
***************<BR>=B9=A6=C4=DC=A3=BA=B4=D3=D7=D6=B7=FB=B4=AE=20
src=20
=
=D6=D0=B7=D6=CE=F6=B3=F6=CD=F8=D5=BE=B5=D8=D6=B7=BA=CD=B6=CB=BF=DA=A3=AC=B2=
=A2=B5=C3=B5=BD=CE=C4=BC=FE=BA=CD=C4=BF=C2=BC<BR>************************=
***************************************/<BR>int=20
GetHost(char * src, char ** web, char ** file, int * port, =
char **=20
dir) {<BR> char * pA, * pB, *=20
pC;<BR> int len;<BR><BR> *port =3D=20
0;<BR> if(!(*src)) return=20
-1;<BR> pA =3D =
src;<BR> if(!strncmp(pA,=20
"http://", strlen("http://"))) pA =3D=20
src+strlen("http://");<BR> /* else =
if(!strncmp(pA,=20
"https://", strlen("https://"))) pA =3D=20
src+strlen("https://"); */<BR> else return=20
1;<BR> pB =3D strchr(pA,=20
'/');<BR> if(pB) {<BR> =
len =3D=20
strlen(pA) - strlen(pB);<BR> GetMemory(web,=20
len);<BR> memcpy((*web), pA, len);<BR> =
=20
if(*(pB+1)) {<BR> =
Rstrchr(pB +=20
1, '/', &pC);<BR> if(pC) len =
=3D=20
strlen(pB + 1) - strlen(pC);<BR> =
else len =3D=20
0;<BR> if(len > 0) {<BR> =20
GetMemory(dir, =
len);<BR> =20
memcpy((*dir), pB + 1,=20
len);<BR><BR> if(pC + =
1)=20
{<BR> len =3D =
strlen(pC +=20
1);<BR> =
GetMemory(file,=20
len);<BR> =
memcpy((*file), pC=20
+ 1, len);<BR> =
}<BR> =20
else {<BR> =
len =3D 1;<BR> =
=20
GetMemory(file, len);<BR> =
=20
memcpy((*file), e, len);<BR> =20
}<BR> }<BR> =
else {<BR> =20
len =3D 1;<BR> =20
GetMemory(dir, len);<BR> =
=20
memcpy((*dir), e + 1, len);<BR><BR> =20
len =3D strlen(pB + =
1);<BR> =20
GetMemory(file, =
len);<BR> =20
memcpy((*file), pB + 1,=20
len);<BR> }<BR> =
}<BR> =20
else {<BR> len =3D =
1;<BR> =20
GetMemory(dir, len);<BR> =
=20
memcpy((*dir), e + 1, len);<BR><BR> =
len =3D 1;<BR> =
GetMemory(file,=20
len);<BR> memcpy((*file), e,=20
len);<BR> =20
=
}<BR> }<BR> else {<BR> =20
len =3D strlen(pA);<BR> GetMemory(web, =
len);<BR> =20
memcpy((*web), pA, strlen(pA));<BR> len =
=3D=20
1;<BR> GetMemory(dir, len);<BR> =20
memcpy((*dir), e + 1, len);<BR> len =3D =
1;<BR> =20
GetMemory(file, len);<BR> =
memcpy((*file), e,=20
len);<BR> }<BR><BR> pA =3D =
strchr((*web),=20
':');<BR> if(pA) *port =3D atoi(pA +=20
1);<BR> else *port =3D =
80;<BR><BR> return=20
=
0;<BR>}<BR><BR>/*********************************************************=
************<BR>*filename:=20
mailaddrsearch.c<BR>*purpose: =D3=C3 C=20
=
=D3=EF=D1=D4=B1=E0=D0=B4=D2=BB=B8=F6=CD=F8=C2=E7=D6=A9=D6=EB=C0=B4=CB=D1=CB=
=F7=CD=F8=C9=CF=B3=F6=CF=D6=B5=C4=B5=E7=D7=D3=D3=CA=BC=FE=B5=D8=D6=B7<BR>=
*tidied by: zhoulifa(<A=20
href=3D"mailto:zhoulifa@163.com">zhoulifa@163.com</A>) =
=D6=DC=C1=A2=B7=A2(<A=20
href=3D"http://zhoulifa.bokee.com)/"=20
=
target=3D_blank>http://zhoulifa.bokee.com)/</A><BR>Linux=B0=AE=BA=C3=D5=DF=
Linux=D6=AA=CA=B6=B4=AB=B2=A5=D5=DF=20
SOHO=D7=E5 =BF=AA=B7=A2=D5=DF =
=D7=EE=C9=C3=B3=A4C=D3=EF=D1=D4<BR>*date time:2006-08-31 =
21:00:00<BR>*Note:=20
=
=C8=CE=BA=CE=C8=CB=BF=C9=D2=D4=C8=CE=D2=E2=B8=B4=D6=C6=B4=FA=C2=EB=B2=A2=D4=
=CB=D3=C3=D5=E2=D0=A9=CE=C4=B5=B5=A3=AC=B5=B1=C8=BB=B0=FC=C0=A8=C4=E3=B5=C4=
=C9=CC=D2=B5=D3=C3=CD=BE<BR>* =B5=AB=C7=EB=D7=F1=D1=ADGPL<BR>*Thanks to: =
<A=20
href=3D"http://www.gd-linux.org/"=20
target=3D_blank>http://www.gd-linux.org/</A> =
=B9=E3=B6=AB=CA=A1 Linux=20
=
=B9=AB=B9=B2=B7=FE=CE=F1=BC=BC=CA=F5=D6=A7=B3=D6=D6=D0=D0=C4<BR>*********=
************************************************************/<BR><BR>int =
main(int argc, char ** argv)<BR>{<BR> =
int=20
WebPort;<BR> char * WebHost =3D =
0, *=20
PageAddress =3D 0, * WebDir =3D 0;<BR><BR> =
=20
if(argc < 2) {if(DEBUG) fprintf(stdout, "Command error, =
you=20
should input like this:\n\t%s WebPageAddress1 =
WebPageAddress2=20
WebPageAddress3 ...", argv[0]); exit(0);}<BR><BR> =
=20
NodeHeader =3D NodeTail =3D NodeCurr =3D =
0;<BR> =20
//setlocale(LC_ALL, "zh_CN.gb2312");<BR> =
=20
for(i =3D 1; i < argc; i++) =
=20
{<BR> =
=20
ret =3D GetHost(argv<I>, &WebHost, &PageAddress, =
&WebPort,=20
&WebDir); /* Get web page info */<BR> =
=20
if(ret) =
=20
{if(DEBUG) fprintf(stdout, "GetHost error from '%s'\n", =
argv<I>);=20
exit(0);}<BR> =
=20
AddInitNode(WebHost, PageAddress, WebPort, WebDir); /* add =
this page=20
to chain */<BR> }<BR> =
=20
free(WebHost); =
free(PageAddress);free(WebDir);<BR> =20
if(DEBUG) =20
{<BR> =
fprintf(stdout, "\nDisplay.%5d:", FileNumber);<BR> =
=20
=
DisplayNode(NodeHeader);=20
/* display every node */<BR> =
}<BR> =20
HandleInitNode(NodeHeader); /* handle =
every=20
page */<BR> return=20
=
0;<BR>}<BR><BR>/*********************************************************=
*****<BR>=B9=A6=C4=DC=A3=BA=B7=D6=CE=F6=CD=F8=D2=B3<BR>******************=
*********************************************/<BR>void=20
AnalyzePage(WEBNODE * node)<BR>{<BR> =
int=20
fd;<BR> int flength =3D =
0;<BR> =20
fd =3D open(node->file, =
O_RDONLY);<BR> =20
if(fd =3D=3D -1) =
goto=20
__AnalyzeDone;<BR> flength =3D =
lseek(fd, 1,=20
SEEK_END);<BR> write(fd, "\0",=20
1);<BR> lseek(fd, 0, =
SEEK_SET);<BR> =20
mapped_mem =3D mmap(0, flength, =
PROT_READ,=20
MAP_PRIVATE, fd, 0);<BR> =20
GetEmail(mapped_mem);<BR> =20
GetLink(mapped_mem);<BR> =20
close(fd);<BR> munmap(mapped_mem, =
flength);<BR>__AnalyzeDone:<BR> =20
close(fd);<BR> node->IsHandled =
=3D=20
1;<BR> =20
=
remove(node->file);<BR>}<BR><BR>/*************************************=
*************************<BR>=B9=A6=C4=DC=A3=BA=CE=AA=B8=F9=BD=DA=B5=E3=C9=
=E8=D6=C3=D0=D6=B5=DC=BD=DA=B5=E3<BR>************************************=
***************************/<BR>void=20
AddInitNode(char * Host, char * Page, int Port, char *=20
Dir)<BR>{<BR> WEBNODE *=20
NewNode;<BR> char =
filename[MAXFILENAME +=20
1] =3D "";<BR><BR> if(NodeHeader =
=3D=3D NULL)=20
NewNode =3D NodeH⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -