?? httpd.lst
字號(hào):
189 3 return;
190 3 } else if(uip_newdata() && hs->state == HTTP_NOGET) {
191 3 /* This is the first data we receive, and it should contain a
192 3 GET. */
193 3
194 3 /* Check for GET. */
195 3 if(uip_appdata[0] != ISO_G ||
196 3 uip_appdata[1] != ISO_E ||
197 3 uip_appdata[2] != ISO_T ||
198 3 uip_appdata[3] != ISO_space) {
199 4 /* If it isn't a GET, we abort the connection. */
200 4 uip_abort();
201 4 return;
202 4 }
203 3
204 3 /* Find the file we are looking for. */
205 3 for(i = 4; i < 40; ++i) {
206 4 if(uip_appdata[i] == ISO_space ||
207 4 uip_appdata[i] == ISO_cr ||
208 4 uip_appdata[i] == ISO_nl) {
209 5 uip_appdata[i] = 0;
210 5 break;
211 5 }
212 4 }
213 3
214 3 PRINT("request for file ");
215 3 PRINTLN(&uip_appdata[4]);
216 3
217 3 /* Check for a request for "/". */
218 3 if(uip_appdata[4] == ISO_slash &&
219 3 uip_appdata[5] == 0) {
220 4 fs_open(file_index_html->name, &fsfile);
221 4 } else {
222 4 if(!fs_open((const char *)&uip_appdata[4], &fsfile)) {
223 5 PRINTLN("couldn't open file");
224 5 fs_open(file_404_html->name, &fsfile);
225 5 }
226 4 }
227 3
228 3
229 3 if(uip_appdata[4] == ISO_slash &&
230 3 uip_appdata[5] == ISO_c &&
231 3 uip_appdata[6] == ISO_g &&
232 3 uip_appdata[7] == ISO_i &&
233 3 uip_appdata[8] == ISO_slash) {
234 4 /* If the request is for a file that starts with "/cgi/", we
235 4 prepare for invoking a script. */
236 4 hs->script = fsfile.dat;
237 4 next_scriptstate();
238 4 } else {
239 4 hs->script = NULL;
240 4 /* The web server is now no longer in the HTTP_NOGET state, but
C51 COMPILER V8.16 HTTPD 03/16/2009 23:18:13 PAGE 5
241 4 in the HTTP_FILE state since is has now got the GET from
242 4 the client and will start transmitting the file. */
243 4 hs->state = HTTP_FILE;
244 4
245 4 /* Point the file pointers in the connection state to point to
246 4 the first byte of the file. */
247 4 hs->dataptr = fsfile.dat;
248 4 hs->count = fsfile.len;
249 4 }
250 3 }
251 2
252 2
253 2 if(hs->state != HTTP_FUNC) {
254 3 /* Check if the client (remote end) has acknowledged any data that
255 3 we've previously sent. If so, we move the file pointer further
256 3 into the file and send back more data. If we are out of data to
257 3 send, we close the connection. */
258 3 if(uip_acked()) {
259 4 if(hs->count >= uip_conn->len) {
260 5 hs->count -= uip_conn->len;
261 5 hs->dataptr += uip_conn->len;
262 5 } else {
263 5 hs->count = 0;
264 5 }
265 4
266 4 if(hs->count == 0) {
267 5 if(hs->script != NULL) {
268 6 next_scriptline();
269 6 next_scriptstate();
270 6 } else {
271 6 uip_close();
272 6 }
273 5 }
274 4 }
275 3 } else {
276 3 /* Call the CGI function. */
277 3 if(cgitab[hs->script[2] - ISO_a](uip_acked())) {
278 4 /* If the function returns non-zero, we jump to the next line
279 4 in the script. */
280 4 next_scriptline();
281 4 next_scriptstate();
282 4 }
283 3 }
284 2
285 2 if(hs->state != HTTP_FUNC && !uip_poll()) {
286 3 /* Send a piece of data, but not more than the MSS of the
287 3 connection. */
288 3 uip_send(hs->dataptr, hs->count);
289 3 }
290 2
291 2 /* Finally, return to uIP. Our outgoing packet will soon be on its
292 2 way... */
293 2 return;
294 2
295 2 default:
296 2 /* Should never happen. */
297 2 uip_abort();
298 2 break;
299 2 }
300 1 }
301 /*-----------------------------------------------------------------------------------*/
302 /* next_scriptline():
C51 COMPILER V8.16 HTTPD 03/16/2009 23:18:13 PAGE 6
303 *
304 * Reads the script until it finds a newline. */
305 static void
306 next_scriptline(void)
307 {
308 1 /* Loop until we find a newline character. */
309 1 do {
310 2 ++(hs->script);
311 2 } while(hs->script[0] != ISO_nl);
312 1
313 1 /* Eat up the newline as well. */
314 1 ++(hs->script);
315 1 }
316 /*-----------------------------------------------------------------------------------*/
317 /* next_sciptstate:
318 *
319 * Reads one line of script and decides what to do next.
320 */
321 static void
322 next_scriptstate(void)
323 {
324 1 struct fs_file fsfile;
325 1 u8_t i;
326 1
327 1 again:
328 1 switch(hs->script[0]) {
329 2 case ISO_t:
330 2 /* Send a text string. */
331 2 hs->state = HTTP_TEXT;
332 2 hs->dataptr = &hs->script[2];
333 2
334 2 /* Calculate length of string. */
335 2 for(i = 0; hs->dataptr[i] != ISO_nl; ++i);
336 2 hs->count = i;
337 2 break;
338 2 case ISO_c:
339 2 /* Call a function. */
340 2 hs->state = HTTP_FUNC;
341 2 hs->dataptr = NULL;
342 2 hs->count = 0;
343 2 cgitab[hs->script[2] - ISO_a](0);
344 2 break;
345 2 case ISO_i:
346 2 /* Include a file. */
347 2 hs->state = HTTP_FILE;
348 2 if(!fs_open(&hs->script[2], &fsfile)) {
349 3 uip_abort();
350 3 }
351 2 hs->dataptr = fsfile.dat;
352 2 hs->count = fsfile.len;
353 2 break;
354 2 case ISO_hash:
355 2 /* Comment line. */
356 2 next_scriptline();
357 2 goto again;
358 2 break;
359 2 case ISO_period:
360 2 /* End of script. */
361 2 hs->state = HTTP_END;
362 2 uip_close();
363 2 break;
364 2 default:
C51 COMPILER V8.16 HTTPD 03/16/2009 23:18:13 PAGE 7
365 2 uip_abort();
366 2 break;
367 2 }
368 1 }
369 /*-----------------------------------------------------------------------------------*/
370 /** @} */
371 /** @} */
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 1523 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = 3 10
PDATA SIZE = ---- ----
DATA SIZE = ---- ----
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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