1 9df487d7 2003-11-23 devnull #include <u.h>
2 9df487d7 2003-11-23 devnull #include <libc.h>
3 9df487d7 2003-11-23 devnull #include <httpd.h>
5 9df487d7 2003-11-23 devnull static char hstates[] = "nrewE";
6 9df487d7 2003-11-23 devnull static char hxfers[] = " x";
9 9df487d7 2003-11-23 devnull hinit(Hio *h, int fd, int mode)
11 9df487d7 2003-11-23 devnull if(fd == -1 || mode != Hread && mode != Hwrite)
12 9df487d7 2003-11-23 devnull return -1;
13 9df487d7 2003-11-23 devnull h->hh = nil;
14 9df487d7 2003-11-23 devnull h->fd = fd;
15 9df487d7 2003-11-23 devnull h->seek = 0;
16 9df487d7 2003-11-23 devnull h->state = mode;
17 9df487d7 2003-11-23 devnull h->start = h->buf + 16; /* leave space for chunk length */
18 9df487d7 2003-11-23 devnull h->stop = h->pos = h->start;
19 9df487d7 2003-11-23 devnull if(mode == Hread){
20 9df487d7 2003-11-23 devnull h->bodylen = ~0UL;
21 9df487d7 2003-11-23 devnull *h->pos = '\0';
23 9df487d7 2003-11-23 devnull h->stop = h->start + Hsize;
24 9df487d7 2003-11-23 devnull return 0;
28 9df487d7 2003-11-23 devnull hiserror(Hio *h)
30 9df487d7 2003-11-23 devnull return h->state == Herr;
34 9df487d7 2003-11-23 devnull hgetc(Hio *h)
36 9df487d7 2003-11-23 devnull uchar *p;
38 9df487d7 2003-11-23 devnull p = h->pos;
39 9df487d7 2003-11-23 devnull if(p < h->stop){
40 9df487d7 2003-11-23 devnull h->pos = p + 1;
41 9df487d7 2003-11-23 devnull return *p;
43 9df487d7 2003-11-23 devnull p -= UTFmax;
44 9df487d7 2003-11-23 devnull if(p < h->start)
45 9df487d7 2003-11-23 devnull p = h->start;
46 9df487d7 2003-11-23 devnull if(!hreadbuf(h, p) || h->pos == h->stop)
47 9df487d7 2003-11-23 devnull return -1;
48 9df487d7 2003-11-23 devnull return *h->pos++;
52 9df487d7 2003-11-23 devnull hungetc(Hio *h)
54 9df487d7 2003-11-23 devnull if(h->state == Hend)
55 9df487d7 2003-11-23 devnull h->state = Hread;
56 9df487d7 2003-11-23 devnull else if(h->state == Hread)
57 9df487d7 2003-11-23 devnull h->pos--;
58 9df487d7 2003-11-23 devnull if(h->pos < h->start || h->state != Hread){
59 9df487d7 2003-11-23 devnull h->state = Herr;
60 9df487d7 2003-11-23 devnull h->pos = h->stop;
61 9df487d7 2003-11-23 devnull return -1;
63 9df487d7 2003-11-23 devnull return 0;
67 9df487d7 2003-11-23 devnull * fill the buffer, saving contents from vsave onwards.
68 9df487d7 2003-11-23 devnull * nothing is saved if vsave is nil.
69 9df487d7 2003-11-23 devnull * returns the beginning of the buffer.
71 9df487d7 2003-11-23 devnull * understands message body sizes and chunked transfer encoding
74 9df487d7 2003-11-23 devnull hreadbuf(Hio *h, void *vsave)
77 9df487d7 2003-11-23 devnull uchar *save;
78 9df487d7 2003-11-23 devnull int c, in, cpy, dpos;
80 9df487d7 2003-11-23 devnull save = vsave;
81 9df487d7 2003-11-23 devnull if(save && (save < h->start || save > h->stop)
82 9df487d7 2003-11-23 devnull || h->state != Hread && h->state != Hend){
83 9df487d7 2003-11-23 devnull h->state = Herr;
84 9df487d7 2003-11-23 devnull h->pos = h->stop;
85 9df487d7 2003-11-23 devnull return nil;
88 9df487d7 2003-11-23 devnull dpos = 0;
89 9df487d7 2003-11-23 devnull if(save && h->pos > save)
90 9df487d7 2003-11-23 devnull dpos = h->pos - save;
92 9df487d7 2003-11-23 devnull if(save){
93 9df487d7 2003-11-23 devnull cpy = h->stop - save;
94 9df487d7 2003-11-23 devnull memmove(h->start, save, cpy);
96 9df487d7 2003-11-23 devnull h->seek += h->stop - h->start - cpy;
97 9df487d7 2003-11-23 devnull h->pos = h->start + dpos;
99 9df487d7 2003-11-23 devnull in = Hsize - cpy;
100 9df487d7 2003-11-23 devnull if(h->state == Hend)
102 9df487d7 2003-11-23 devnull else if(in > h->bodylen)
103 9df487d7 2003-11-23 devnull in = h->bodylen;
106 9df487d7 2003-11-23 devnull * for chunked encoding, fill buffer,
107 9df487d7 2003-11-23 devnull * then read in new chunk length and wipe out that line
109 9df487d7 2003-11-23 devnull hh = h->hh;
110 9df487d7 2003-11-23 devnull if(hh != nil){
111 9df487d7 2003-11-23 devnull if(!in && h->xferenc && h->state != Hend){
112 9df487d7 2003-11-23 devnull if(h->xferenc == 2){
113 9df487d7 2003-11-23 devnull c = hgetc(hh);
114 9df487d7 2003-11-23 devnull if(c == '\r')
115 9df487d7 2003-11-23 devnull c = hgetc(hh);
116 9df487d7 2003-11-23 devnull if(c != '\n'){
117 9df487d7 2003-11-23 devnull h->pos = h->stop;
118 9df487d7 2003-11-23 devnull h->state = Herr;
119 9df487d7 2003-11-23 devnull return nil;
122 9df487d7 2003-11-23 devnull h->xferenc = 2;
124 9df487d7 2003-11-23 devnull while((c = hgetc(hh)) != '\n'){
125 9df487d7 2003-11-23 devnull if(c >= '0' && c <= '9')
126 9df487d7 2003-11-23 devnull c -= '0';
127 9df487d7 2003-11-23 devnull else if(c >= 'a' && c <= 'f')
128 9df487d7 2003-11-23 devnull c -= 'a' - 10;
129 9df487d7 2003-11-23 devnull else if(c >= 'A' && c <= 'F')
130 9df487d7 2003-11-23 devnull c -= 'A' - 10;
133 9df487d7 2003-11-23 devnull in = in * 16 + c;
135 9df487d7 2003-11-23 devnull while(c != '\n'){
136 9df487d7 2003-11-23 devnull if(c < 0){
137 9df487d7 2003-11-23 devnull h->pos = h->stop;
138 9df487d7 2003-11-23 devnull h->state = Herr;
139 9df487d7 2003-11-23 devnull return nil;
141 9df487d7 2003-11-23 devnull c = hgetc(hh);
143 9df487d7 2003-11-23 devnull h->bodylen = in;
145 9df487d7 2003-11-23 devnull in = Hsize - cpy;
146 9df487d7 2003-11-23 devnull if(in > h->bodylen)
147 9df487d7 2003-11-23 devnull in = h->bodylen;
150 9df487d7 2003-11-23 devnull while(hh->pos + in > hh->stop){
151 9df487d7 2003-11-23 devnull if(hreadbuf(hh, hh->pos) == nil){
152 9df487d7 2003-11-23 devnull h->pos = h->stop;
153 9df487d7 2003-11-23 devnull h->state = Herr;
154 9df487d7 2003-11-23 devnull return nil;
157 9df487d7 2003-11-23 devnull memmove(h->start + cpy, hh->pos, in);
158 9df487d7 2003-11-23 devnull hh->pos += in;
160 2277c5d7 2004-03-21 devnull }else if(in){
161 2277c5d7 2004-03-21 devnull if((in = read(h->fd, h->start + cpy, in)) < 0){
162 2277c5d7 2004-03-21 devnull h->state = Herr;
163 2277c5d7 2004-03-21 devnull h->pos = h->stop;
164 2277c5d7 2004-03-21 devnull return nil;
167 9df487d7 2003-11-23 devnull if(in == 0)
168 9df487d7 2003-11-23 devnull h->state = Hend;
170 9df487d7 2003-11-23 devnull h->bodylen -= in;
172 9df487d7 2003-11-23 devnull h->stop = h->start + cpy + in;
173 9df487d7 2003-11-23 devnull *h->stop = '\0';
174 9df487d7 2003-11-23 devnull if(h->pos == h->stop)
175 9df487d7 2003-11-23 devnull return nil;
176 9df487d7 2003-11-23 devnull return h->start;
180 9df487d7 2003-11-23 devnull hbuflen(Hio *h, void *p)
182 9df487d7 2003-11-23 devnull return h->stop - (uchar*)p;
186 9df487d7 2003-11-23 devnull * prepare to receive a message body
187 9df487d7 2003-11-23 devnull * len is the content length (~0 => unspecified)
188 9df487d7 2003-11-23 devnull * te is the transfer encoding
189 9df487d7 2003-11-23 devnull * returns < 0 if setup failed
192 9df487d7 2003-11-23 devnull hbodypush(Hio *hh, ulong len, HFields *te)
197 9df487d7 2003-11-23 devnull if(hh->state != Hread)
198 9df487d7 2003-11-23 devnull return nil;
200 9df487d7 2003-11-23 devnull if(te != nil){
201 9df487d7 2003-11-23 devnull if(te->params != nil || te->next != nil)
202 9df487d7 2003-11-23 devnull return nil;
203 9df487d7 2003-11-23 devnull if(cistrcmp(te->s, "chunked") == 0){
205 9df487d7 2003-11-23 devnull len = 0;
206 9df487d7 2003-11-23 devnull }else if(cistrcmp(te->s, "identity") == 0){
209 9df487d7 2003-11-23 devnull return nil;
212 9df487d7 2003-11-23 devnull h = malloc(sizeof *h);
213 9df487d7 2003-11-23 devnull if(h == nil)
214 9df487d7 2003-11-23 devnull return nil;
216 9df487d7 2003-11-23 devnull h->hh = hh;
217 9df487d7 2003-11-23 devnull h->fd = -1;
218 9df487d7 2003-11-23 devnull h->seek = 0;
219 9df487d7 2003-11-23 devnull h->state = Hread;
220 9df487d7 2003-11-23 devnull h->xferenc = xe;
221 9df487d7 2003-11-23 devnull h->start = h->buf + 16; /* leave space for chunk length */
222 9df487d7 2003-11-23 devnull h->stop = h->pos = h->start;
223 9df487d7 2003-11-23 devnull *h->pos = '\0';
224 9df487d7 2003-11-23 devnull h->bodylen = len;
225 9df487d7 2003-11-23 devnull return h;
229 9df487d7 2003-11-23 devnull * dump the state of the io buffer into a string
232 9df487d7 2003-11-23 devnull hunload(Hio *h)
234 9df487d7 2003-11-23 devnull uchar *p, *t, *stop, *buf;
235 9df487d7 2003-11-23 devnull int ne, n, c;
237 9df487d7 2003-11-23 devnull stop = h->stop;
239 9df487d7 2003-11-23 devnull for(p = h->pos; p < stop; p++){
241 9df487d7 2003-11-23 devnull if(c == 0x80)
244 9df487d7 2003-11-23 devnull p = h->pos;
246 9df487d7 2003-11-23 devnull n = (stop - p) + ne + 3;
247 9df487d7 2003-11-23 devnull buf = mallocz(n, 1);
248 9df487d7 2003-11-23 devnull if(buf == nil)
249 9df487d7 2003-11-23 devnull return nil;
250 9df487d7 2003-11-23 devnull buf[0] = hstates[h->state];
251 9df487d7 2003-11-23 devnull buf[1] = hxfers[h->xferenc];
253 9df487d7 2003-11-23 devnull t = &buf[2];
254 9df487d7 2003-11-23 devnull for(; p < stop; p++){
256 9df487d7 2003-11-23 devnull if(c == 0 || c == 0x80){
257 9df487d7 2003-11-23 devnull *t++ = 0x80;
258 9df487d7 2003-11-23 devnull if(c == 0x80)
259 9df487d7 2003-11-23 devnull *t++ = 0x80;
261 9df487d7 2003-11-23 devnull *t++ = c;
263 9df487d7 2003-11-23 devnull *t++ = '\0';
264 9df487d7 2003-11-23 devnull if(t != buf + n)
265 9df487d7 2003-11-23 devnull return nil;
266 9df487d7 2003-11-23 devnull return (char*)buf;
270 9df487d7 2003-11-23 devnull * read the io buffer state from a string
273 9df487d7 2003-11-23 devnull hload(Hio *h, char *buf)
275 9df487d7 2003-11-23 devnull uchar *p, *t, *stop;
276 9df487d7 2003-11-23 devnull char *s;
279 9df487d7 2003-11-23 devnull s = strchr(hstates, buf[0]);
280 9df487d7 2003-11-23 devnull if(s == nil)
281 2e965b33 2004-05-05 devnull return -1;
282 9df487d7 2003-11-23 devnull h->state = s - hstates;
284 9df487d7 2003-11-23 devnull s = strchr(hxfers, buf[1]);
285 9df487d7 2003-11-23 devnull if(s == nil)
286 4bef0baf 2004-12-27 devnull return -1;
287 9df487d7 2003-11-23 devnull h->xferenc = s - hxfers;
289 9df487d7 2003-11-23 devnull t = h->start;
290 9df487d7 2003-11-23 devnull stop = t + Hsize;
291 9df487d7 2003-11-23 devnull for(p = (uchar*)&buf[2]; c = *p; p++){
292 9df487d7 2003-11-23 devnull if(c == 0x80){
293 9df487d7 2003-11-23 devnull if(p[1] != 0x80)
298 9df487d7 2003-11-23 devnull *t++ = c;
299 9df487d7 2003-11-23 devnull if(t >= stop)
300 2e965b33 2004-05-05 devnull return -1;
302 9df487d7 2003-11-23 devnull *t = '\0';
303 9df487d7 2003-11-23 devnull h->pos = h->start;
304 9df487d7 2003-11-23 devnull h->stop = t;
305 9df487d7 2003-11-23 devnull h->seek = 0;
306 2e965b33 2004-05-05 devnull return 0;
310 9df487d7 2003-11-23 devnull hclose(Hio *h)
312 9df487d7 2003-11-23 devnull if(h->fd >= 0){
313 9df487d7 2003-11-23 devnull if(h->state == Hwrite)
314 9df487d7 2003-11-23 devnull hxferenc(h, 0);
315 9df487d7 2003-11-23 devnull close(h->fd);
317 9df487d7 2003-11-23 devnull h->stop = h->pos = nil;
318 9df487d7 2003-11-23 devnull h->fd = -1;
322 9df487d7 2003-11-23 devnull * flush the buffer and possibly change encoding modes
325 9df487d7 2003-11-23 devnull hxferenc(Hio *h, int on)
327 9df487d7 2003-11-23 devnull if(h->xferenc && !on && h->pos != h->start)
328 9df487d7 2003-11-23 devnull hflush(h);
329 9df487d7 2003-11-23 devnull if(hflush(h) < 0)
330 9df487d7 2003-11-23 devnull return -1;
331 9df487d7 2003-11-23 devnull h->xferenc = !!on;
332 9df487d7 2003-11-23 devnull return 0;
336 9df487d7 2003-11-23 devnull hputc(Hio *h, int c)
338 9df487d7 2003-11-23 devnull uchar *p;
340 9df487d7 2003-11-23 devnull p = h->pos;
341 9df487d7 2003-11-23 devnull if(p < h->stop){
342 9df487d7 2003-11-23 devnull h->pos = p + 1;
343 9df487d7 2003-11-23 devnull return *p = c;
345 9df487d7 2003-11-23 devnull if(hflush(h) < 0)
346 9df487d7 2003-11-23 devnull return -1;
347 9df487d7 2003-11-23 devnull return *h->pos++ = c;
350 9df487d7 2003-11-23 devnull static int
351 9df487d7 2003-11-23 devnull fmthflush(Fmt *f)
355 9df487d7 2003-11-23 devnull h = f->farg;
356 9df487d7 2003-11-23 devnull h->pos = f->to;
357 9df487d7 2003-11-23 devnull if(hflush(h) < 0)
358 9df487d7 2003-11-23 devnull return 0;
359 9df487d7 2003-11-23 devnull f->stop = h->stop;
360 9df487d7 2003-11-23 devnull f->to = h->pos;
361 9df487d7 2003-11-23 devnull f->start = h->pos;
362 9df487d7 2003-11-23 devnull return 1;
366 9df487d7 2003-11-23 devnull hvprint(Hio *h, char *fmt, va_list args)
371 9df487d7 2003-11-23 devnull f.runes = 0;
372 9df487d7 2003-11-23 devnull f.stop = h->stop;
373 9df487d7 2003-11-23 devnull f.to = h->pos;
374 9df487d7 2003-11-23 devnull f.start = h->pos;
375 9df487d7 2003-11-23 devnull f.flush = fmthflush;
376 9df487d7 2003-11-23 devnull f.farg = h;
377 9df487d7 2003-11-23 devnull f.nfmt = 0;
378 18443075 2005-02-08 devnull n = fmtvprint(&f, fmt, args);
379 9df487d7 2003-11-23 devnull h->pos = f.to;
380 9df487d7 2003-11-23 devnull return n;
384 9df487d7 2003-11-23 devnull hprint(Hio *h, char *fmt, ...)
387 9df487d7 2003-11-23 devnull va_list arg;
389 9df487d7 2003-11-23 devnull va_start(arg, fmt);
390 9df487d7 2003-11-23 devnull n = hvprint(h, fmt, arg);
391 9df487d7 2003-11-23 devnull va_end(arg);
392 9df487d7 2003-11-23 devnull return n;
395 4bef0baf 2004-12-27 devnull static int
396 4bef0baf 2004-12-27 devnull _hflush(Hio *h, int dolength)
398 9df487d7 2003-11-23 devnull uchar *s;
401 9df487d7 2003-11-23 devnull if(h->state != Hwrite){
402 9df487d7 2003-11-23 devnull h->state = Herr;
403 9df487d7 2003-11-23 devnull h->stop = h->pos;
404 9df487d7 2003-11-23 devnull return -1;
406 9df487d7 2003-11-23 devnull s = h->start;
407 9df487d7 2003-11-23 devnull w = h->pos - s;
408 9df487d7 2003-11-23 devnull if(h->xferenc){
409 9df487d7 2003-11-23 devnull *--s = '\n';
410 9df487d7 2003-11-23 devnull *--s = '\r';
412 9df487d7 2003-11-23 devnull *--s = "0123456789abcdef"[w & 0xf];
413 9df487d7 2003-11-23 devnull w >>= 4;
414 9df487d7 2003-11-23 devnull }while(w);
415 9df487d7 2003-11-23 devnull h->pos[0] = '\r';
416 9df487d7 2003-11-23 devnull h->pos[1] = '\n';
417 9df487d7 2003-11-23 devnull w = &h->pos[2] - s;
419 4bef0baf 2004-12-27 devnull if(dolength)
420 4bef0baf 2004-12-27 devnull fprint(h->fd, "Content-Length: %d\r\n\r\n", w);
421 9df487d7 2003-11-23 devnull if(write(h->fd, s, w) != w){
422 9df487d7 2003-11-23 devnull h->state = Herr;
423 9df487d7 2003-11-23 devnull h->stop = h->pos;
424 9df487d7 2003-11-23 devnull return -1;
426 9df487d7 2003-11-23 devnull h->seek += w;
427 9df487d7 2003-11-23 devnull h->pos = h->start;
428 9df487d7 2003-11-23 devnull return 0;
432 4bef0baf 2004-12-27 devnull hflush(Hio *h)
434 4bef0baf 2004-12-27 devnull return _hflush(h, 0);
438 4bef0baf 2004-12-27 devnull hlflush(Hio* h)
440 4bef0baf 2004-12-27 devnull return _hflush(h, 1);
444 9df487d7 2003-11-23 devnull hwrite(Hio *h, void *vbuf, int len)
446 7eded25c 2005-02-16 devnull uchar *buf;
447 9df487d7 2003-11-23 devnull int n, m;
449 9df487d7 2003-11-23 devnull buf = vbuf;
450 9df487d7 2003-11-23 devnull n = len;
451 9df487d7 2003-11-23 devnull if(n < 0 || h->state != Hwrite){
452 9df487d7 2003-11-23 devnull h->state = Herr;
453 9df487d7 2003-11-23 devnull h->stop = h->pos;
454 9df487d7 2003-11-23 devnull return -1;
456 7eded25c 2005-02-16 devnull if(h->pos + n >= h->stop){
457 7eded25c 2005-02-16 devnull if(h->start != h->pos)
458 7eded25c 2005-02-16 devnull if(hflush(h) < 0)
459 9df487d7 2003-11-23 devnull return -1;
460 7eded25c 2005-02-16 devnull while(h->pos + n >= h->stop){
461 7eded25c 2005-02-16 devnull m = h->stop - h->pos;
462 7eded25c 2005-02-16 devnull if(h->xferenc){
463 7eded25c 2005-02-16 devnull memmove(h->pos, buf, m);
464 7eded25c 2005-02-16 devnull h->pos += m;
465 7eded25c 2005-02-16 devnull if(hflush(h) < 0)
466 7eded25c 2005-02-16 devnull return -1;
468 7eded25c 2005-02-16 devnull if(write(h->fd, buf, m) != m){
469 7eded25c 2005-02-16 devnull h->state = Herr;
470 7eded25c 2005-02-16 devnull h->stop = h->pos;
471 7eded25c 2005-02-16 devnull return -1;
473 7eded25c 2005-02-16 devnull h->seek += m;
476 7eded25c 2005-02-16 devnull buf += m;
479 7eded25c 2005-02-16 devnull memmove(h->pos, buf, n);
480 7eded25c 2005-02-16 devnull h->pos += n;
481 9df487d7 2003-11-23 devnull return len;