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 fprint(2, "read %d from %d\n", in, h->fd);
162 2277c5d7 2004-03-21 devnull if((in = read(h->fd, h->start + cpy, in)) < 0){
163 2277c5d7 2004-03-21 devnull fprint(2, "got error: %r\n");
164 2277c5d7 2004-03-21 devnull h->state = Herr;
165 2277c5d7 2004-03-21 devnull h->pos = h->stop;
166 2277c5d7 2004-03-21 devnull return nil;
168 2277c5d7 2004-03-21 devnull fprint(2, "got %d\n", in);
170 9df487d7 2003-11-23 devnull if(in == 0)
171 9df487d7 2003-11-23 devnull h->state = Hend;
173 9df487d7 2003-11-23 devnull h->bodylen -= in;
175 9df487d7 2003-11-23 devnull h->stop = h->start + cpy + in;
176 9df487d7 2003-11-23 devnull *h->stop = '\0';
177 9df487d7 2003-11-23 devnull if(h->pos == h->stop)
178 9df487d7 2003-11-23 devnull return nil;
179 9df487d7 2003-11-23 devnull return h->start;
183 9df487d7 2003-11-23 devnull hbuflen(Hio *h, void *p)
185 9df487d7 2003-11-23 devnull return h->stop - (uchar*)p;
189 9df487d7 2003-11-23 devnull * prepare to receive a message body
190 9df487d7 2003-11-23 devnull * len is the content length (~0 => unspecified)
191 9df487d7 2003-11-23 devnull * te is the transfer encoding
192 9df487d7 2003-11-23 devnull * returns < 0 if setup failed
195 9df487d7 2003-11-23 devnull hbodypush(Hio *hh, ulong len, HFields *te)
200 9df487d7 2003-11-23 devnull if(hh->state != Hread)
201 9df487d7 2003-11-23 devnull return nil;
203 9df487d7 2003-11-23 devnull if(te != nil){
204 9df487d7 2003-11-23 devnull if(te->params != nil || te->next != nil)
205 9df487d7 2003-11-23 devnull return nil;
206 9df487d7 2003-11-23 devnull if(cistrcmp(te->s, "chunked") == 0){
208 9df487d7 2003-11-23 devnull len = 0;
209 9df487d7 2003-11-23 devnull }else if(cistrcmp(te->s, "identity") == 0){
212 9df487d7 2003-11-23 devnull return nil;
215 9df487d7 2003-11-23 devnull h = malloc(sizeof *h);
216 9df487d7 2003-11-23 devnull if(h == nil)
217 9df487d7 2003-11-23 devnull return nil;
219 9df487d7 2003-11-23 devnull h->hh = hh;
220 9df487d7 2003-11-23 devnull h->fd = -1;
221 9df487d7 2003-11-23 devnull h->seek = 0;
222 9df487d7 2003-11-23 devnull h->state = Hread;
223 9df487d7 2003-11-23 devnull h->xferenc = xe;
224 9df487d7 2003-11-23 devnull h->start = h->buf + 16; /* leave space for chunk length */
225 9df487d7 2003-11-23 devnull h->stop = h->pos = h->start;
226 9df487d7 2003-11-23 devnull *h->pos = '\0';
227 9df487d7 2003-11-23 devnull h->bodylen = len;
228 9df487d7 2003-11-23 devnull return h;
232 9df487d7 2003-11-23 devnull * dump the state of the io buffer into a string
235 9df487d7 2003-11-23 devnull hunload(Hio *h)
237 9df487d7 2003-11-23 devnull uchar *p, *t, *stop, *buf;
238 9df487d7 2003-11-23 devnull int ne, n, c;
240 9df487d7 2003-11-23 devnull stop = h->stop;
242 9df487d7 2003-11-23 devnull for(p = h->pos; p < stop; p++){
244 9df487d7 2003-11-23 devnull if(c == 0x80)
247 9df487d7 2003-11-23 devnull p = h->pos;
249 9df487d7 2003-11-23 devnull n = (stop - p) + ne + 3;
250 9df487d7 2003-11-23 devnull buf = mallocz(n, 1);
251 9df487d7 2003-11-23 devnull if(buf == nil)
252 9df487d7 2003-11-23 devnull return nil;
253 9df487d7 2003-11-23 devnull buf[0] = hstates[h->state];
254 9df487d7 2003-11-23 devnull buf[1] = hxfers[h->xferenc];
256 9df487d7 2003-11-23 devnull t = &buf[2];
257 9df487d7 2003-11-23 devnull for(; p < stop; p++){
259 9df487d7 2003-11-23 devnull if(c == 0 || c == 0x80){
260 9df487d7 2003-11-23 devnull *t++ = 0x80;
261 9df487d7 2003-11-23 devnull if(c == 0x80)
262 9df487d7 2003-11-23 devnull *t++ = 0x80;
264 9df487d7 2003-11-23 devnull *t++ = c;
266 9df487d7 2003-11-23 devnull *t++ = '\0';
267 9df487d7 2003-11-23 devnull if(t != buf + n)
268 9df487d7 2003-11-23 devnull return nil;
269 9df487d7 2003-11-23 devnull return (char*)buf;
273 9df487d7 2003-11-23 devnull * read the io buffer state from a string
276 9df487d7 2003-11-23 devnull hload(Hio *h, char *buf)
278 9df487d7 2003-11-23 devnull uchar *p, *t, *stop;
279 9df487d7 2003-11-23 devnull char *s;
282 9df487d7 2003-11-23 devnull s = strchr(hstates, buf[0]);
283 9df487d7 2003-11-23 devnull if(s == nil)
284 9df487d7 2003-11-23 devnull return 0;
285 9df487d7 2003-11-23 devnull h->state = s - hstates;
287 9df487d7 2003-11-23 devnull s = strchr(hxfers, buf[1]);
288 9df487d7 2003-11-23 devnull if(s == nil)
289 9df487d7 2003-11-23 devnull return 0;
290 9df487d7 2003-11-23 devnull h->xferenc = s - hxfers;
292 9df487d7 2003-11-23 devnull t = h->start;
293 9df487d7 2003-11-23 devnull stop = t + Hsize;
294 9df487d7 2003-11-23 devnull for(p = (uchar*)&buf[2]; c = *p; p++){
295 9df487d7 2003-11-23 devnull if(c == 0x80){
296 9df487d7 2003-11-23 devnull if(p[1] != 0x80)
301 9df487d7 2003-11-23 devnull *t++ = c;
302 9df487d7 2003-11-23 devnull if(t >= stop)
303 9df487d7 2003-11-23 devnull return 0;
305 9df487d7 2003-11-23 devnull *t = '\0';
306 9df487d7 2003-11-23 devnull h->pos = h->start;
307 9df487d7 2003-11-23 devnull h->stop = t;
308 9df487d7 2003-11-23 devnull h->seek = 0;
309 9df487d7 2003-11-23 devnull return 1;
313 9df487d7 2003-11-23 devnull hclose(Hio *h)
315 9df487d7 2003-11-23 devnull if(h->fd >= 0){
316 9df487d7 2003-11-23 devnull if(h->state == Hwrite)
317 9df487d7 2003-11-23 devnull hxferenc(h, 0);
318 9df487d7 2003-11-23 devnull close(h->fd);
320 9df487d7 2003-11-23 devnull h->stop = h->pos = nil;
321 9df487d7 2003-11-23 devnull h->fd = -1;
325 9df487d7 2003-11-23 devnull * flush the buffer and possibly change encoding modes
328 9df487d7 2003-11-23 devnull hxferenc(Hio *h, int on)
330 9df487d7 2003-11-23 devnull if(h->xferenc && !on && h->pos != h->start)
331 9df487d7 2003-11-23 devnull hflush(h);
332 9df487d7 2003-11-23 devnull if(hflush(h) < 0)
333 9df487d7 2003-11-23 devnull return -1;
334 9df487d7 2003-11-23 devnull h->xferenc = !!on;
335 9df487d7 2003-11-23 devnull return 0;
339 9df487d7 2003-11-23 devnull hputc(Hio *h, int c)
341 9df487d7 2003-11-23 devnull uchar *p;
343 9df487d7 2003-11-23 devnull p = h->pos;
344 9df487d7 2003-11-23 devnull if(p < h->stop){
345 9df487d7 2003-11-23 devnull h->pos = p + 1;
346 9df487d7 2003-11-23 devnull return *p = c;
348 9df487d7 2003-11-23 devnull if(hflush(h) < 0)
349 9df487d7 2003-11-23 devnull return -1;
350 9df487d7 2003-11-23 devnull return *h->pos++ = c;
353 9df487d7 2003-11-23 devnull static int
354 9df487d7 2003-11-23 devnull fmthflush(Fmt *f)
358 9df487d7 2003-11-23 devnull h = f->farg;
359 9df487d7 2003-11-23 devnull h->pos = f->to;
360 9df487d7 2003-11-23 devnull if(hflush(h) < 0)
361 9df487d7 2003-11-23 devnull return 0;
362 9df487d7 2003-11-23 devnull f->stop = h->stop;
363 9df487d7 2003-11-23 devnull f->to = h->pos;
364 9df487d7 2003-11-23 devnull f->start = h->pos;
365 9df487d7 2003-11-23 devnull return 1;
369 9df487d7 2003-11-23 devnull hvprint(Hio *h, char *fmt, va_list args)
374 9df487d7 2003-11-23 devnull f.runes = 0;
375 9df487d7 2003-11-23 devnull f.stop = h->stop;
376 9df487d7 2003-11-23 devnull f.to = h->pos;
377 9df487d7 2003-11-23 devnull f.start = h->pos;
378 9df487d7 2003-11-23 devnull f.flush = fmthflush;
379 9df487d7 2003-11-23 devnull f.farg = h;
380 9df487d7 2003-11-23 devnull f.nfmt = 0;
381 9df487d7 2003-11-23 devnull f.args = args;
382 9df487d7 2003-11-23 devnull n = dofmt(&f, fmt);
383 9df487d7 2003-11-23 devnull h->pos = f.to;
384 9df487d7 2003-11-23 devnull return n;
388 9df487d7 2003-11-23 devnull hprint(Hio *h, char *fmt, ...)
391 9df487d7 2003-11-23 devnull va_list arg;
393 9df487d7 2003-11-23 devnull va_start(arg, fmt);
394 9df487d7 2003-11-23 devnull n = hvprint(h, fmt, arg);
395 9df487d7 2003-11-23 devnull va_end(arg);
396 9df487d7 2003-11-23 devnull return n;
400 9df487d7 2003-11-23 devnull hflush(Hio *h)
402 9df487d7 2003-11-23 devnull uchar *s;
405 9df487d7 2003-11-23 devnull if(h->state != Hwrite){
406 9df487d7 2003-11-23 devnull h->state = Herr;
407 9df487d7 2003-11-23 devnull h->stop = h->pos;
408 9df487d7 2003-11-23 devnull return -1;
410 9df487d7 2003-11-23 devnull s = h->start;
411 9df487d7 2003-11-23 devnull w = h->pos - s;
412 9df487d7 2003-11-23 devnull if(h->xferenc){
413 9df487d7 2003-11-23 devnull *--s = '\n';
414 9df487d7 2003-11-23 devnull *--s = '\r';
416 9df487d7 2003-11-23 devnull *--s = "0123456789abcdef"[w & 0xf];
417 9df487d7 2003-11-23 devnull w >>= 4;
418 9df487d7 2003-11-23 devnull }while(w);
419 9df487d7 2003-11-23 devnull h->pos[0] = '\r';
420 9df487d7 2003-11-23 devnull h->pos[1] = '\n';
421 9df487d7 2003-11-23 devnull w = &h->pos[2] - s;
423 9df487d7 2003-11-23 devnull if(write(h->fd, s, w) != w){
424 9df487d7 2003-11-23 devnull h->state = Herr;
425 9df487d7 2003-11-23 devnull h->stop = h->pos;
426 9df487d7 2003-11-23 devnull return -1;
428 9df487d7 2003-11-23 devnull h->seek += w;
429 9df487d7 2003-11-23 devnull h->pos = h->start;
430 9df487d7 2003-11-23 devnull return 0;
434 9df487d7 2003-11-23 devnull hwrite(Hio *h, void *vbuf, int len)
436 9df487d7 2003-11-23 devnull uchar *pos, *buf;
437 9df487d7 2003-11-23 devnull int n, m;
439 9df487d7 2003-11-23 devnull buf = vbuf;
440 9df487d7 2003-11-23 devnull n = len;
441 9df487d7 2003-11-23 devnull if(n < 0 || h->state != Hwrite){
442 9df487d7 2003-11-23 devnull h->state = Herr;
443 9df487d7 2003-11-23 devnull h->stop = h->pos;
444 9df487d7 2003-11-23 devnull return -1;
446 9df487d7 2003-11-23 devnull pos = h->pos;
447 9df487d7 2003-11-23 devnull if(pos + n >= h->stop){
448 9df487d7 2003-11-23 devnull m = pos - h->start;
450 9df487d7 2003-11-23 devnull m = Hsize - m;
452 9df487d7 2003-11-23 devnull memmove(pos, buf, m);
453 9df487d7 2003-11-23 devnull buf += m;
456 9df487d7 2003-11-23 devnull if(write(h->fd, h->start, Hsize) != Hsize){
457 9df487d7 2003-11-23 devnull h->state = Herr;
458 9df487d7 2003-11-23 devnull h->stop = h->pos;
459 9df487d7 2003-11-23 devnull return -1;
461 9df487d7 2003-11-23 devnull h->seek += Hsize;
463 9df487d7 2003-11-23 devnull m = n % Hsize;
465 9df487d7 2003-11-23 devnull if(n != 0 && write(h->fd, buf, n) != n){
466 9df487d7 2003-11-23 devnull h->state = Herr;
467 9df487d7 2003-11-23 devnull h->stop = h->pos;
468 9df487d7 2003-11-23 devnull return -1;
470 9df487d7 2003-11-23 devnull h->seek += n;
471 9df487d7 2003-11-23 devnull buf += n;
472 9df487d7 2003-11-23 devnull pos = h->pos = h->start;
475 9df487d7 2003-11-23 devnull memmove(pos, buf, n);
476 9df487d7 2003-11-23 devnull h->pos = pos + n;
477 9df487d7 2003-11-23 devnull return len;