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url parser

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dynamic-accesslists
denis 18 years ago
parent 1c1fd9fe4a
commit 0a3dc7b4ce
1 changed files with 254 additions and 159 deletions
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413
opentracker.c
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@ -31,177 +31,272 @@ struct http_data {
io_batch iob; io_batch iob;
char* hdrbuf; char* hdrbuf;
int hlen; int hlen;
char ip[16];
}; };
int header_complete(struct http_data* r) { int header_complete(struct http_data* r)
long i; {
long l=array_bytes(&r->r); long i;
const char* c=array_start(&r->r);
for (i=0; i+1<l; ++i) { long l = array_bytes(&r->r);
if (c[i]=='\n' && c[i+1]=='\n') const char* c = array_start(&r->r);
return i+2;
if (i+3<l && for (i=0; i+1<l; ++i)
c[i]=='\r' && c[i+1]=='\n' && {
c[i+2]=='\r' && c[i+3]=='\n') if (c[i]=='\n' && c[i+1]=='\n')
return i+4; return i+2;
}
return 0; if (i+3<l && c[i]=='\r' && c[i+1]=='\n' && c[i+2]=='\r' && c[i+3]=='\n')
return i+4;
}
return 0;
} }
void httperror(struct http_data* r,const char* title,const char* message) { void httperror(struct http_data* r,const char* title,const char* message)
char* c; {
c=r->hdrbuf=(char*)malloc(strlen(message)+strlen(title)+200); char* c;
if (!c) { c=r->hdrbuf=(char*)malloc(strlen(message)+strlen(title)+200);
r->hdrbuf="HTTP/1.0 500 internal error\r\nContent-Type: text/plain\r\nConnection: close\r\n\r\nout of memory\n";
r->hlen=strlen(r->hdrbuf); if (!c)
} else { {
c+=fmt_str(c,"HTTP/1.0 "); r->hdrbuf="HTTP/1.0 500 internal error\r\nContent-Type: text/plain\r\nConnection: close\r\n\r\nout of memory\n";
c+=fmt_str(c,title); r->hlen=strlen(r->hdrbuf);
c+=fmt_str(c,"\r\nContent-Type: text/html\r\nConnection: close\r\nContent-Length: "); }
c+=fmt_ulong(c,strlen(message)+strlen(title)+16-4); else
c+=fmt_str(c,"\r\n\r\n<title>"); {
c+=fmt_str(c,title+4); c+=fmt_str(c,"HTTP/1.0 ");
c+=fmt_str(c,"</title>\n"); c+=fmt_str(c,title);
r->hlen=c - r->hdrbuf; c+=fmt_str(c,"\r\nContent-Type: text/html\r\nConnection: close\r\nContent-Length: ");
} c+=fmt_ulong(c,strlen(message)+strlen(title)+16-4);
iob_addbuf(&r->iob,r->hdrbuf,r->hlen); c+=fmt_str(c,"\r\n\r\n<title>");
c+=fmt_str(c,title+4);
c+=fmt_str(c,"</title>\n");
r->hlen=c - r->hdrbuf;
}
iob_addbuf(&r->iob,r->hdrbuf,r->hlen);
} }
const char* http_header(struct http_data* r,const char* h) { // bestimmten http parameter auslesen und adresse zurueckgeben
long i;
long l=array_bytes(&r->r); const char* http_header(struct http_data* r,const char* h)
long sl=strlen(h); {
const char* c=array_start(&r->r); long i;
for (i=0; i+sl+2<l; ++i)
if (c[i]=='\n' && case_equalb(c+i+1,sl,h) && c[i+sl+1]==':') { long l = array_bytes(&r->r);
c+=i+sl+1; long sl = strlen(h);
if (*c==' ' || *c=='\t') ++c; const char* c = array_start(&r->r);
return c;
} for (i=0; i+sl+2<l; ++i)
return 0; {
if (c[i]=='\n' && case_equalb(c+i+1,sl,h) && c[i+sl+1]==':')
{
c+=i+sl+1;
if (*c==' ' || *c=='\t') ++c;
return c;
}
return 0;
}
} }
void httpresponse(struct http_data* h,int64 s) { void httpresponse(struct http_data* h,int64 s)
char* c; {
array_cat0(&h->r); char* c;
c=array_start(&h->r); array_cat0(&h->r);
if (byte_diff(c,4,"GET ")) {
c = array_start(&h->r);
if (byte_diff(c,4,"GET "))
{
e400: e400:
httperror(h,"400 Invalid Request","This server only understands GET."); httperror(h,"400 Invalid Request","This server only understands GET.");
} else { }
char *d; else
int64 fd; {
struct stat s; char *d;
c+=4; int64 fd;
for (d=c; *d!=' '&&*d!='\t'&&*d!='\n'&&*d!='\r'; ++d) ; struct stat s;
if (*d!=' ') goto e400;
*d=0; // expect 'GET /uri?nnbjhg HTTP/1.*'
if (c[0]!='/') goto e404; c+=4;
while (c[1]=='/') ++c;
if (!io_readfile(&fd,c+1)) { for (d=c; *d!=' '&&*d!='\t'&&*d!='\n'&&*d!='\r'; ++d) ;
if (*d!=' ') goto e400;
*d=0;
if (c[0]!='/') goto e404;
while (c[1]=='/') ++c;
if (!byte_diff(c,9,"announce?"))
{
// info_hash, left, port, numwant, compact
struct ot_peer peer;
byte_copy( peer.ip, h->ip, 4);
peer.port = 6881;
c+=9;
while( *c!=' ' ) {
if(!byte_diff(c,10,"info_hash="))
{
// String is expected to be URL encoded, so expect
// (%[0-9A-F][0-9A-F]){20}
int s = scan_urlencoded(
}
else if(!byte_diff(c,8,"numwant="))
{
}
else if(!byte_diff(c,8,"compact="))
{
}
else if(!byte_diff(c,5,"port="))
{
}
else if(!byte_diff(c,5,"left="))
{
}
while( *++c!=' ' && *c!='&');
}
}
else if (!byte_diff(c,7,"scrape?"))
{
}
else
{
httperror(h,"404 Not Found","No such file or directory.");
goto e404;
}
c=h->hdrbuf=(char*)malloc(500);
c+=fmt_str(c,"HTTP/1.1 Coming Up\r\nContent-Type: text/plain");
c+=fmt_str(c,"\r\nContent-Length: ");
/* ANSWER SIZE*/
c+=fmt_ulonglong(c,s.st_size);
c+=fmt_str(c,"\r\nLast-Modified: ");
/* MODIFY DATE */
c+=fmt_httpdate(c,s.st_mtime);
c+=fmt_str(c,"\r\nConnection: close\r\n\r\n");
iob_addbuf(&h->iob,h->hdrbuf,c - h->hdrbuf);
iob_addbuf(&h->iob,tracker_answer, tzracker_answer_size);
}
e404: e404:
httperror(h,"404 Not Found","No such file or directory."); io_dontwantread(s);
} else { io_wantwrite(s);
if (fstat(fd,&s)==-1) {
io_close(fd);
goto e404;
}
c=h->hdrbuf=(char*)malloc(500);
c+=fmt_str(c,"HTTP/1.1 Coming Up\r\nContent-Type: text/plain");
c+=fmt_str(c,"\r\nContent-Length: ");
/* ANSWER SIZE*/
c+=fmt_ulonglong(c,s.st_size);
c+=fmt_str(c,"\r\nLast-Modified: ");
/* MODIFY DATE */
c+=fmt_httpdate(c,s.st_mtime);
c+=fmt_str(c,"\r\nConnection: close\r\n\r\n");
iob_addbuf(&h->iob,h->hdrbuf,c - h->hdrbuf);
iob_addfile(&h->iob,fd,0,s.st_size);
}
}
io_dontwantread(s);
io_wantwrite(s);
} }
int main() { int main()
int s=socket_tcp6(); {
uint32 scope_id; int s=socket_tcp6();
char ip[16]; uint32 scope_id;
uint16 port; char ip[16];
if (socket_bind6_reuse(s,V6any,8000,0)==-1) uint16 port;
panic("socket_bind6_reuse");
if (socket_listen(s,16)==-1) if (socket_bind6_reuse(s,V6any,8000,0)==-1)
panic("socket_listen"); panic("socket_bind6_reuse");
if (!io_fd(s))
panic("io_fd"); if (socket_listen(s,16)==-1)
io_wantread(s); panic("socket_listen");
for (;;) {
int64 i; if (!io_fd(s))
io_wait(); panic("io_fd");
while ((i=io_canread())!=-1) {
if (i==s) { io_wantread(s);
int n;
while ((n=socket_accept6(s,ip,&port,&scope_id))!=-1) { for (;;)
if (io_fd(n)) { {
struct http_data* h=(struct http_data*)malloc(sizeof(struct http_data)); int64 i;
io_wantread(n); io_wait();
if (h) {
byte_zero(h,sizeof(struct http_data)); while ((i=io_canread())!=-1)
io_setcookie(n,h); {
} else if (i==s) // ist es der serversocket?
io_close(n); {
} else int n;
io_close(n); while ((n=socket_accept6(s,ip,&port,&scope_id))!=-1)
buffer_putnlflush(buffer_2); {
} if (io_fd(n))
if (errno==EAGAIN) {
io_eagain(s); struct http_data* h=(struct http_data*)malloc(sizeof(struct http_data));
else io_wantread(n);
carp("socket_accept6");
} else { if (h)
char buf[8192]; {
struct http_data* h=io_getcookie(i); byte_zero(h,sizeof(struct http_data));
int l=io_tryread(i,buf,sizeof buf); byte_copy(h->ip,ip,sizeof(ip));
if (l==-3) { io_setcookie(n,h);
if (h) { } else
array_reset(&h->r); io_close(n);
iob_reset(&h->iob); } else
free(h->hdrbuf); h->hdrbuf=0; io_close(n);
} buffer_putnlflush(buffer_2);
io_close(i); }
} else if (l==0) { if (errno==EAGAIN)
if (h) { io_eagain(s);
array_reset(&h->r); else
iob_reset(&h->iob); carp("socket_accept6");
free(h->hdrbuf); h->hdrbuf=0; }
} else
io_close(i); {
} else if (l>0) { char buf[8192];
array_catb(&h->r,buf,l); struct http_data* h=io_getcookie(i);
if (array_failed(&h->r)) {
httperror(h,"500 Server Error","request too long."); int l=io_tryread(i,buf,sizeof buf);
if (l<=0)
{
if (h)
{
array_reset(&h->r);
iob_reset(&h->iob);
free(h->hdrbuf); h->hdrbuf=0;
}
io_close(i);
}
else
{
array_catb(&h->r,buf,l);
if (array_failed(&h->r))
{
httperror(h,"500 Server Error","request too long.");
emerge: emerge:
io_dontwantread(i); io_dontwantread(i);
io_wantwrite(i); io_wantwrite(i);
} else if (array_bytes(&h->r)>8192) { }
httperror(h,"500 request too long","You sent too much headers"); else if (array_bytes(&h->r)>8192)
goto emerge; {
} else if ((l=header_complete(h))) httperror(h,"500 request too long","You sent too much headers");
httpresponse(h,i); goto emerge;
}
else if ((l=header_complete(h)))
{
httpresponse(h,i);
}
}
}
}
while ((i=io_canwrite())!=-1)
{
struct http_data* h=io_getcookie(i);
int64 r=iob_send(i,&h->iob);
if (r==-1)
io_eagain(i);
else
if (r<=0)
{
array_trunc(&h->r);
iob_reset(&h->iob);
free(h->hdrbuf); h->hdrbuf=0;
io_close(i);
}
}
} }
} return 0;
}
while ((i=io_canwrite())!=-1) {
struct http_data* h=io_getcookie(i);
int64 r=iob_send(i,&h->iob);
if (r==-1) io_eagain(i); else
if (r<=0) {
array_trunc(&h->r);
iob_reset(&h->iob);
free(h->hdrbuf); h->hdrbuf=0;
io_close(i);
}
}
}
return 0;
} }

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