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-rw-r--r--opentracker.c288
1 files changed, 288 insertions, 0 deletions
diff --git a/opentracker.c b/opentracker.c
new file mode 100644
index 0000000..bd47a24
--- /dev/null
+++ b/opentracker.c
@@ -0,0 +1,288 @@
1#include "socket.h"
2#include "io.h"
3#include "buffer.h"
4#include "ip6.h"
5#include "array.h"
6#include "case.h"
7#include "fmt.h"
8#include "iob.h"
9#include "str.h"
10#include <sys/types.h>
11#include <sys/stat.h>
12#include <unistd.h>
13#include <stdlib.h>
14#include <errno.h>
15
16static void carp(const char* routine) {
17 buffer_puts(buffer_2,routine);
18 buffer_puts(buffer_2,": ");
19 buffer_puterror(buffer_2);
20 buffer_putnlflush(buffer_2);
21}
22
23static void panic(const char* routine) {
24 carp(routine);
25 exit(111);
26}
27
28struct http_data {
29 array r;
30 io_batch iob;
31 char* hdrbuf;
32 int hlen;
33 int keepalive;
34};
35
36int header_complete(struct http_data* r) {
37 long i;
38 long l=array_bytes(&r->r);
39 const char* c=array_start(&r->r);
40 for (i=0; i+1<l; ++i) {
41 if (c[i]=='\n' && c[i+1]=='\n')
42 return i+2;
43 if (i+3<l &&
44 c[i]=='\r' && c[i+1]=='\n' &&
45 c[i+2]=='\r' && c[i+3]=='\n')
46 return i+4;
47 }
48 return 0;
49}
50
51void httperror(struct http_data* r,const char* title,const char* message) {
52 char* c;
53 c=r->hdrbuf=(char*)malloc(strlen(message)+strlen(title)+200);
54 if (!c) {
55 r->hdrbuf="HTTP/1.0 500 internal error\r\nContent-Type: text/plain\r\nConnection: close\r\n\r\nout of memory\n";
56 r->hlen=strlen(r->hdrbuf);
57 } else {
58 c+=fmt_str(c,"HTTP/1.0 ");
59 c+=fmt_str(c,title);
60 c+=fmt_str(c,"\r\nContent-Type: text/html\r\nConnection: ");
61 c+=fmt_str(c,r->keepalive?"keep-alive":"close");
62 c+=fmt_str(c,"\r\nContent-Length: ");
63 c+=fmt_ulong(c,strlen(message)+strlen(title)+16-4);
64 c+=fmt_str(c,"\r\n\r\n<title>");
65 c+=fmt_str(c,title+4);
66 c+=fmt_str(c,"</title>\n");
67 r->hlen=c - r->hdrbuf;
68 }
69 iob_addbuf(&r->iob,r->hdrbuf,r->hlen);
70}
71
72static struct mimeentry { const char* name, *type; } mimetab[] = {
73 { "html", "text/html" },
74 { "css", "text/css" },
75 { "dvi", "application/x-dvi" },
76 { "ps", "application/postscript" },
77 { "pdf", "application/pdf" },
78 { "gif", "image/gif" },
79 { "png", "image/png" },
80 { "jpeg", "image/jpeg" },
81 { "jpg", "image/jpeg" },
82 { "mpeg", "video/mpeg" },
83 { "mpg", "video/mpeg" },
84 { "avi", "video/x-msvideo" },
85 { "mov", "video/quicktime" },
86 { "qt", "video/quicktime" },
87 { "mp3", "audio/mpeg" },
88 { "ogg", "audio/x-oggvorbis" },
89 { "wav", "audio/x-wav" },
90 { "pac", "application/x-ns-proxy-autoconfig" },
91 { "sig", "application/pgp-signature" },
92 { "torrent", "application/x-bittorrent" },
93 { "class", "application/octet-stream" },
94 { "js", "application/x-javascript" },
95 { "tar", "application/x-tar" },
96 { "zip", "application/zip" },
97 { "dtd", "text/xml" },
98 { "xml", "text/xml" },
99 { "xbm", "image/x-xbitmap" },
100 { "xpm", "image/x-xpixmap" },
101 { "xwd", "image/x-xwindowdump" },
102 { 0,0 } };
103
104const char* mimetype(const char* filename) {
105 int i,e=str_rchr(filename,'.');
106 if (filename[e]==0) return "text/plain";
107 ++e;
108 for (i=0; mimetab[i].name; ++i)
109 if (str_equal(mimetab[i].name,filename+e))
110 return mimetab[i].type;
111 return "application/octet-stream";
112}
113
114const char* http_header(struct http_data* r,const char* h) {
115 long i;
116 long l=array_bytes(&r->r);
117 long sl=strlen(h);
118 const char* c=array_start(&r->r);
119 for (i=0; i+sl+2<l; ++i)
120 if (c[i]=='\n' && case_equalb(c+i+1,sl,h) && c[i+sl+1]==':') {
121 c+=i+sl+1;
122 if (*c==' ' || *c=='\t') ++c;
123 return c;
124 }
125 return 0;
126}
127
128void httpresponse(struct http_data* h,int64 s) {
129 char* c;
130 const char* m;
131 array_cat0(&h->r);
132 c=array_start(&h->r);
133 if (byte_diff(c,4,"GET ")) {
134e400:
135 httperror(h,"400 Invalid Request","This server only understands GET.");
136 } else {
137 char *d;
138 int64 fd;
139 struct stat s;
140 c+=4;
141 for (d=c; *d!=' '&&*d!='\t'&&*d!='\n'&&*d!='\r'; ++d) ;
142 if (*d!=' ') goto e400;
143 *d=0;
144 if (c[0]!='/') goto e404;
145 while (c[1]=='/') ++c;
146 if (!io_readfile(&fd,c+1)) {
147e404:
148 httperror(h,"404 Not Found","No such file or directory.");
149 } else {
150 if (fstat(fd,&s)==-1) {
151 io_close(fd);
152 goto e404;
153 }
154 if ((m=http_header(h,"Connection"))) {
155 if (str_equal(m,"keep-alive"))
156 h->keepalive=1;
157 else
158 h->keepalive=0;
159 } else {
160 if (byte_equal(d+1,8,"HTTP/1.0"))
161 h->keepalive=0;
162 else
163 h->keepalive=1;
164 }
165 m=mimetype(c);
166 c=h->hdrbuf=(char*)malloc(500);
167 c+=fmt_str(c,"HTTP/1.1 Coming Up\r\nContent-Type: ");
168 c+=fmt_str(c,m);
169 c+=fmt_str(c,"\r\nContent-Length: ");
170 c+=fmt_ulonglong(c,s.st_size);
171 c+=fmt_str(c,"\r\nLast-Modified: ");
172 c+=fmt_httpdate(c,s.st_mtime);
173 c+=fmt_str(c,"\r\nConnection: ");
174 c+=fmt_str(c,h->keepalive?"keep-alive":"close");
175 c+=fmt_str(c,"\r\n\r\n");
176 iob_addbuf(&h->iob,h->hdrbuf,c - h->hdrbuf);
177 iob_addfile(&h->iob,fd,0,s.st_size);
178 }
179 }
180 io_dontwantread(s);
181 io_wantwrite(s);
182}
183
184int main() {
185 int s=socket_tcp6b();
186 uint32 scope_id;
187 char ip[16];
188 uint16 port;
189 if (socket_bind6_reuse(s,V6any,8000,0)==-1)
190 panic("socket_bind6_reuse");
191 if (socket_listen(s,16)==-1)
192 panic("socket_listen");
193 if (!io_fd(s))
194 panic("io_fd");
195 io_wantread(s);
196 for (;;) {
197 int64 i;
198 io_wait();
199 while ((i=io_canread())!=-1) {
200 if (i==s) {
201 int n;
202 while ((n=socket_accept6(s,ip,&port,&scope_id))!=-1) {
203 char buf[IP6_FMT];
204 buffer_puts(buffer_2,"accepted new connection from ");
205 buffer_put(buffer_2,buf,fmt_ip6(buf,ip));
206 buffer_puts(buffer_2,":");
207 buffer_putulong(buffer_2,port);
208 buffer_puts(buffer_2," (fd ");
209 buffer_putulong(buffer_2,n);
210 buffer_puts(buffer_2,")");
211 if (io_fd(n)) {
212 struct http_data* h=(struct http_data*)malloc(sizeof(struct http_data));
213 io_wantread(n);
214 if (h) {
215 byte_zero(h,sizeof(struct http_data));
216 io_setcookie(n,h);
217 } else
218 io_close(n);
219 } else {
220 buffer_puts(buffer_2,", but io_fd failed.");
221 io_close(n);
222 }
223 buffer_putnlflush(buffer_2);
224 }
225 if (errno==EAGAIN)
226 io_eagain(s);
227 else
228 carp("socket_accept6");
229 } else {
230 char buf[8192];
231 struct http_data* h=io_getcookie(i);
232 int l=io_tryread(i,buf,sizeof buf);
233 if (l==-3) {
234 if (h) {
235 array_reset(&h->r);
236 iob_reset(&h->iob);
237 free(h->hdrbuf); h->hdrbuf=0;
238 }
239 buffer_puts(buffer_2,"io_tryread(");
240 buffer_putulong(buffer_2,i);
241 buffer_puts(buffer_2,"): ");
242 buffer_puterror(buffer_2);
243 buffer_putnlflush(buffer_2);
244 io_close(i);
245 } else if (l==0) {
246 if (h) {
247 array_reset(&h->r);
248 iob_reset(&h->iob);
249 free(h->hdrbuf); h->hdrbuf=0;
250 }
251 buffer_puts(buffer_2,"eof on fd #");
252 buffer_putulong(buffer_2,i);
253 buffer_putnlflush(buffer_2);
254 io_close(i);
255 } else if (l>0) {
256 array_catb(&h->r,buf,l);
257 if (array_failed(&h->r)) {
258 httperror(h,"500 Server Error","request too long.");
259emerge:
260 io_dontwantread(i);
261 io_wantwrite(i);
262 } else if (array_bytes(&h->r)>8192) {
263 httperror(h,"500 request too long","You sent too much headers");
264 goto emerge;
265 } else if ((l=header_complete(h)))
266 httpresponse(h,i);
267 }
268 }
269 }
270 while ((i=io_canwrite())!=-1) {
271 struct http_data* h=io_getcookie(i);
272 int64 r=iob_send(i,&h->iob);
273/* printf("iob_send returned %lld\n",r); */
274 if (r==-1) io_eagain(i); else
275 if (r<=0) {
276 array_trunc(&h->r);
277 iob_reset(&h->iob);
278 free(h->hdrbuf); h->hdrbuf=0;
279 if (h->keepalive) {
280 io_dontwantwrite(i);
281 io_wantread(i);
282 } else
283 io_close(i);
284 }
285 }
286 }
287 return 0;
288}