1 | /*************************************************************************** |
2 | * _ _ ____ _ |
3 | * Project ___| | | | _ \| | |
4 | * / __| | | | |_) | | |
5 | * | (__| |_| | _ <| |___ |
6 | * \___|\___/|_| \_\_____| |
7 | * |
8 | * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al. |
9 | * |
10 | * This software is licensed as described in the file COPYING, which |
11 | * you should have received as part of this distribution. The terms |
12 | * are also available at https://curl.haxx.se/docs/copyright.html. |
13 | * |
14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
15 | * copies of the Software, and permit persons to whom the Software is |
16 | * furnished to do so, under the terms of the COPYING file. |
17 | * |
18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
19 | * KIND, either express or implied. |
20 | * |
21 | ***************************************************************************/ |
22 | |
23 | #include "curl_setup.h" |
24 | |
25 | #include <curl/curl.h> |
26 | |
27 | #include "formdata.h" |
28 | #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_MIME) |
29 | |
30 | #if defined(HAVE_LIBGEN_H) && defined(HAVE_BASENAME) |
31 | #include <libgen.h> |
32 | #endif |
33 | |
34 | #include "urldata.h" /* for struct Curl_easy */ |
35 | #include "mime.h" |
36 | #include "non-ascii.h" |
37 | #include "vtls/vtls.h" |
38 | #include "strcase.h" |
39 | #include "sendf.h" |
40 | #include "strdup.h" |
41 | #include "rand.h" |
42 | #include "warnless.h" |
43 | /* The last 3 #include files should be in this order */ |
44 | #include "curl_printf.h" |
45 | #include "curl_memory.h" |
46 | #include "memdebug.h" |
47 | |
48 | |
49 | #define HTTPPOST_PTRNAME CURL_HTTPPOST_PTRNAME |
50 | #define HTTPPOST_FILENAME CURL_HTTPPOST_FILENAME |
51 | #define HTTPPOST_PTRCONTENTS CURL_HTTPPOST_PTRCONTENTS |
52 | #define HTTPPOST_READFILE CURL_HTTPPOST_READFILE |
53 | #define HTTPPOST_PTRBUFFER CURL_HTTPPOST_PTRBUFFER |
54 | #define HTTPPOST_CALLBACK CURL_HTTPPOST_CALLBACK |
55 | #define HTTPPOST_BUFFER CURL_HTTPPOST_BUFFER |
56 | |
57 | /*************************************************************************** |
58 | * |
59 | * AddHttpPost() |
60 | * |
61 | * Adds a HttpPost structure to the list, if parent_post is given becomes |
62 | * a subpost of parent_post instead of a direct list element. |
63 | * |
64 | * Returns newly allocated HttpPost on success and NULL if malloc failed. |
65 | * |
66 | ***************************************************************************/ |
67 | static struct curl_httppost * |
68 | AddHttpPost(char *name, size_t namelength, |
69 | char *value, curl_off_t contentslength, |
70 | char *buffer, size_t bufferlength, |
71 | char *contenttype, |
72 | long flags, |
73 | struct curl_slist *, |
74 | char *showfilename, char *userp, |
75 | struct curl_httppost *parent_post, |
76 | struct curl_httppost **httppost, |
77 | struct curl_httppost **last_post) |
78 | { |
79 | struct curl_httppost *post; |
80 | post = calloc(1, sizeof(struct curl_httppost)); |
81 | if(post) { |
82 | post->name = name; |
83 | post->namelength = (long)(name?(namelength?namelength:strlen(name)):0); |
84 | post->contents = value; |
85 | post->contentlen = contentslength; |
86 | post->buffer = buffer; |
87 | post->bufferlength = (long)bufferlength; |
88 | post->contenttype = contenttype; |
89 | post->contentheader = contentHeader; |
90 | post->showfilename = showfilename; |
91 | post->userp = userp; |
92 | post->flags = flags | CURL_HTTPPOST_LARGE; |
93 | } |
94 | else |
95 | return NULL; |
96 | |
97 | if(parent_post) { |
98 | /* now, point our 'more' to the original 'more' */ |
99 | post->more = parent_post->more; |
100 | |
101 | /* then move the original 'more' to point to ourselves */ |
102 | parent_post->more = post; |
103 | } |
104 | else { |
105 | /* make the previous point to this */ |
106 | if(*last_post) |
107 | (*last_post)->next = post; |
108 | else |
109 | (*httppost) = post; |
110 | |
111 | (*last_post) = post; |
112 | } |
113 | return post; |
114 | } |
115 | |
116 | /*************************************************************************** |
117 | * |
118 | * AddFormInfo() |
119 | * |
120 | * Adds a FormInfo structure to the list presented by parent_form_info. |
121 | * |
122 | * Returns newly allocated FormInfo on success and NULL if malloc failed/ |
123 | * parent_form_info is NULL. |
124 | * |
125 | ***************************************************************************/ |
126 | static FormInfo * AddFormInfo(char *value, |
127 | char *contenttype, |
128 | FormInfo *parent_form_info) |
129 | { |
130 | FormInfo *form_info; |
131 | form_info = calloc(1, sizeof(struct FormInfo)); |
132 | if(form_info) { |
133 | if(value) |
134 | form_info->value = value; |
135 | if(contenttype) |
136 | form_info->contenttype = contenttype; |
137 | form_info->flags = HTTPPOST_FILENAME; |
138 | } |
139 | else |
140 | return NULL; |
141 | |
142 | if(parent_form_info) { |
143 | /* now, point our 'more' to the original 'more' */ |
144 | form_info->more = parent_form_info->more; |
145 | |
146 | /* then move the original 'more' to point to ourselves */ |
147 | parent_form_info->more = form_info; |
148 | } |
149 | |
150 | return form_info; |
151 | } |
152 | |
153 | /*************************************************************************** |
154 | * |
155 | * FormAdd() |
156 | * |
157 | * Stores a formpost parameter and builds the appropriate linked list. |
158 | * |
159 | * Has two principal functionalities: using files and byte arrays as |
160 | * post parts. Byte arrays are either copied or just the pointer is stored |
161 | * (as the user requests) while for files only the filename and not the |
162 | * content is stored. |
163 | * |
164 | * While you may have only one byte array for each name, multiple filenames |
165 | * are allowed (and because of this feature CURLFORM_END is needed after |
166 | * using CURLFORM_FILE). |
167 | * |
168 | * Examples: |
169 | * |
170 | * Simple name/value pair with copied contents: |
171 | * curl_formadd (&post, &last, CURLFORM_COPYNAME, "name", |
172 | * CURLFORM_COPYCONTENTS, "value", CURLFORM_END); |
173 | * |
174 | * name/value pair where only the content pointer is remembered: |
175 | * curl_formadd (&post, &last, CURLFORM_COPYNAME, "name", |
176 | * CURLFORM_PTRCONTENTS, ptr, CURLFORM_CONTENTSLENGTH, 10, CURLFORM_END); |
177 | * (if CURLFORM_CONTENTSLENGTH is missing strlen () is used) |
178 | * |
179 | * storing a filename (CONTENTTYPE is optional!): |
180 | * curl_formadd (&post, &last, CURLFORM_COPYNAME, "name", |
181 | * CURLFORM_FILE, "filename1", CURLFORM_CONTENTTYPE, "plain/text", |
182 | * CURLFORM_END); |
183 | * |
184 | * storing multiple filenames: |
185 | * curl_formadd (&post, &last, CURLFORM_COPYNAME, "name", |
186 | * CURLFORM_FILE, "filename1", CURLFORM_FILE, "filename2", CURLFORM_END); |
187 | * |
188 | * Returns: |
189 | * CURL_FORMADD_OK on success |
190 | * CURL_FORMADD_MEMORY if the FormInfo allocation fails |
191 | * CURL_FORMADD_OPTION_TWICE if one option is given twice for one Form |
192 | * CURL_FORMADD_NULL if a null pointer was given for a char |
193 | * CURL_FORMADD_MEMORY if the allocation of a FormInfo struct failed |
194 | * CURL_FORMADD_UNKNOWN_OPTION if an unknown option was used |
195 | * CURL_FORMADD_INCOMPLETE if the some FormInfo is not complete (or error) |
196 | * CURL_FORMADD_MEMORY if a HttpPost struct cannot be allocated |
197 | * CURL_FORMADD_MEMORY if some allocation for string copying failed. |
198 | * CURL_FORMADD_ILLEGAL_ARRAY if an illegal option is used in an array |
199 | * |
200 | ***************************************************************************/ |
201 | |
202 | static |
203 | CURLFORMcode FormAdd(struct curl_httppost **httppost, |
204 | struct curl_httppost **last_post, |
205 | va_list params) |
206 | { |
207 | FormInfo *first_form, *current_form, *form = NULL; |
208 | CURLFORMcode return_value = CURL_FORMADD_OK; |
209 | const char *prevtype = NULL; |
210 | struct curl_httppost *post = NULL; |
211 | CURLformoption option; |
212 | struct curl_forms *forms = NULL; |
213 | char *array_value = NULL; /* value read from an array */ |
214 | |
215 | /* This is a state variable, that if TRUE means that we're parsing an |
216 | array that we got passed to us. If FALSE we're parsing the input |
217 | va_list arguments. */ |
218 | bool array_state = FALSE; |
219 | |
220 | /* |
221 | * We need to allocate the first struct to fill in. |
222 | */ |
223 | first_form = calloc(1, sizeof(struct FormInfo)); |
224 | if(!first_form) |
225 | return CURL_FORMADD_MEMORY; |
226 | |
227 | current_form = first_form; |
228 | |
229 | /* |
230 | * Loop through all the options set. Break if we have an error to report. |
231 | */ |
232 | while(return_value == CURL_FORMADD_OK) { |
233 | |
234 | /* first see if we have more parts of the array param */ |
235 | if(array_state && forms) { |
236 | /* get the upcoming option from the given array */ |
237 | option = forms->option; |
238 | array_value = (char *)forms->value; |
239 | |
240 | forms++; /* advance this to next entry */ |
241 | if(CURLFORM_END == option) { |
242 | /* end of array state */ |
243 | array_state = FALSE; |
244 | continue; |
245 | } |
246 | } |
247 | else { |
248 | /* This is not array-state, get next option */ |
249 | option = va_arg(params, CURLformoption); |
250 | if(CURLFORM_END == option) |
251 | break; |
252 | } |
253 | |
254 | switch(option) { |
255 | case CURLFORM_ARRAY: |
256 | if(array_state) |
257 | /* we don't support an array from within an array */ |
258 | return_value = CURL_FORMADD_ILLEGAL_ARRAY; |
259 | else { |
260 | forms = va_arg(params, struct curl_forms *); |
261 | if(forms) |
262 | array_state = TRUE; |
263 | else |
264 | return_value = CURL_FORMADD_NULL; |
265 | } |
266 | break; |
267 | |
268 | /* |
269 | * Set the Name property. |
270 | */ |
271 | case CURLFORM_PTRNAME: |
272 | #ifdef CURL_DOES_CONVERSIONS |
273 | /* Treat CURLFORM_PTR like CURLFORM_COPYNAME so that libcurl will copy |
274 | * the data in all cases so that we'll have safe memory for the eventual |
275 | * conversion. |
276 | */ |
277 | #else |
278 | current_form->flags |= HTTPPOST_PTRNAME; /* fall through */ |
279 | #endif |
280 | /* FALLTHROUGH */ |
281 | case CURLFORM_COPYNAME: |
282 | if(current_form->name) |
283 | return_value = CURL_FORMADD_OPTION_TWICE; |
284 | else { |
285 | char *name = array_state? |
286 | array_value:va_arg(params, char *); |
287 | if(name) |
288 | current_form->name = name; /* store for the moment */ |
289 | else |
290 | return_value = CURL_FORMADD_NULL; |
291 | } |
292 | break; |
293 | case CURLFORM_NAMELENGTH: |
294 | if(current_form->namelength) |
295 | return_value = CURL_FORMADD_OPTION_TWICE; |
296 | else |
297 | current_form->namelength = |
298 | array_state?(size_t)array_value:(size_t)va_arg(params, long); |
299 | break; |
300 | |
301 | /* |
302 | * Set the contents property. |
303 | */ |
304 | case CURLFORM_PTRCONTENTS: |
305 | current_form->flags |= HTTPPOST_PTRCONTENTS; |
306 | /* FALLTHROUGH */ |
307 | case CURLFORM_COPYCONTENTS: |
308 | if(current_form->value) |
309 | return_value = CURL_FORMADD_OPTION_TWICE; |
310 | else { |
311 | char *value = |
312 | array_state?array_value:va_arg(params, char *); |
313 | if(value) |
314 | current_form->value = value; /* store for the moment */ |
315 | else |
316 | return_value = CURL_FORMADD_NULL; |
317 | } |
318 | break; |
319 | case CURLFORM_CONTENTSLENGTH: |
320 | current_form->contentslength = |
321 | array_state?(size_t)array_value:(size_t)va_arg(params, long); |
322 | break; |
323 | |
324 | case CURLFORM_CONTENTLEN: |
325 | current_form->flags |= CURL_HTTPPOST_LARGE; |
326 | current_form->contentslength = |
327 | array_state?(curl_off_t)(size_t)array_value:va_arg(params, curl_off_t); |
328 | break; |
329 | |
330 | /* Get contents from a given file name */ |
331 | case CURLFORM_FILECONTENT: |
332 | if(current_form->flags & (HTTPPOST_PTRCONTENTS|HTTPPOST_READFILE)) |
333 | return_value = CURL_FORMADD_OPTION_TWICE; |
334 | else { |
335 | const char *filename = array_state? |
336 | array_value:va_arg(params, char *); |
337 | if(filename) { |
338 | current_form->value = strdup(filename); |
339 | if(!current_form->value) |
340 | return_value = CURL_FORMADD_MEMORY; |
341 | else { |
342 | current_form->flags |= HTTPPOST_READFILE; |
343 | current_form->value_alloc = TRUE; |
344 | } |
345 | } |
346 | else |
347 | return_value = CURL_FORMADD_NULL; |
348 | } |
349 | break; |
350 | |
351 | /* We upload a file */ |
352 | case CURLFORM_FILE: |
353 | { |
354 | const char *filename = array_state?array_value: |
355 | va_arg(params, char *); |
356 | |
357 | if(current_form->value) { |
358 | if(current_form->flags & HTTPPOST_FILENAME) { |
359 | if(filename) { |
360 | char *fname = strdup(filename); |
361 | if(!fname) |
362 | return_value = CURL_FORMADD_MEMORY; |
363 | else { |
364 | form = AddFormInfo(fname, NULL, current_form); |
365 | if(!form) { |
366 | free(fname); |
367 | return_value = CURL_FORMADD_MEMORY; |
368 | } |
369 | else { |
370 | form->value_alloc = TRUE; |
371 | current_form = form; |
372 | form = NULL; |
373 | } |
374 | } |
375 | } |
376 | else |
377 | return_value = CURL_FORMADD_NULL; |
378 | } |
379 | else |
380 | return_value = CURL_FORMADD_OPTION_TWICE; |
381 | } |
382 | else { |
383 | if(filename) { |
384 | current_form->value = strdup(filename); |
385 | if(!current_form->value) |
386 | return_value = CURL_FORMADD_MEMORY; |
387 | else { |
388 | current_form->flags |= HTTPPOST_FILENAME; |
389 | current_form->value_alloc = TRUE; |
390 | } |
391 | } |
392 | else |
393 | return_value = CURL_FORMADD_NULL; |
394 | } |
395 | break; |
396 | } |
397 | |
398 | case CURLFORM_BUFFERPTR: |
399 | current_form->flags |= HTTPPOST_PTRBUFFER|HTTPPOST_BUFFER; |
400 | if(current_form->buffer) |
401 | return_value = CURL_FORMADD_OPTION_TWICE; |
402 | else { |
403 | char *buffer = |
404 | array_state?array_value:va_arg(params, char *); |
405 | if(buffer) { |
406 | current_form->buffer = buffer; /* store for the moment */ |
407 | current_form->value = buffer; /* make it non-NULL to be accepted |
408 | as fine */ |
409 | } |
410 | else |
411 | return_value = CURL_FORMADD_NULL; |
412 | } |
413 | break; |
414 | |
415 | case CURLFORM_BUFFERLENGTH: |
416 | if(current_form->bufferlength) |
417 | return_value = CURL_FORMADD_OPTION_TWICE; |
418 | else |
419 | current_form->bufferlength = |
420 | array_state?(size_t)array_value:(size_t)va_arg(params, long); |
421 | break; |
422 | |
423 | case CURLFORM_STREAM: |
424 | current_form->flags |= HTTPPOST_CALLBACK; |
425 | if(current_form->userp) |
426 | return_value = CURL_FORMADD_OPTION_TWICE; |
427 | else { |
428 | char *userp = |
429 | array_state?array_value:va_arg(params, char *); |
430 | if(userp) { |
431 | current_form->userp = userp; |
432 | current_form->value = userp; /* this isn't strictly true but we |
433 | derive a value from this later on |
434 | and we need this non-NULL to be |
435 | accepted as a fine form part */ |
436 | } |
437 | else |
438 | return_value = CURL_FORMADD_NULL; |
439 | } |
440 | break; |
441 | |
442 | case CURLFORM_CONTENTTYPE: |
443 | { |
444 | const char *contenttype = |
445 | array_state?array_value:va_arg(params, char *); |
446 | if(current_form->contenttype) { |
447 | if(current_form->flags & HTTPPOST_FILENAME) { |
448 | if(contenttype) { |
449 | char *type = strdup(contenttype); |
450 | if(!type) |
451 | return_value = CURL_FORMADD_MEMORY; |
452 | else { |
453 | form = AddFormInfo(NULL, type, current_form); |
454 | if(!form) { |
455 | free(type); |
456 | return_value = CURL_FORMADD_MEMORY; |
457 | } |
458 | else { |
459 | form->contenttype_alloc = TRUE; |
460 | current_form = form; |
461 | form = NULL; |
462 | } |
463 | } |
464 | } |
465 | else |
466 | return_value = CURL_FORMADD_NULL; |
467 | } |
468 | else |
469 | return_value = CURL_FORMADD_OPTION_TWICE; |
470 | } |
471 | else { |
472 | if(contenttype) { |
473 | current_form->contenttype = strdup(contenttype); |
474 | if(!current_form->contenttype) |
475 | return_value = CURL_FORMADD_MEMORY; |
476 | else |
477 | current_form->contenttype_alloc = TRUE; |
478 | } |
479 | else |
480 | return_value = CURL_FORMADD_NULL; |
481 | } |
482 | break; |
483 | } |
484 | case CURLFORM_CONTENTHEADER: |
485 | { |
486 | /* this "cast increases required alignment of target type" but |
487 | we consider it OK anyway */ |
488 | struct curl_slist *list = array_state? |
489 | (struct curl_slist *)(void *)array_value: |
490 | va_arg(params, struct curl_slist *); |
491 | |
492 | if(current_form->contentheader) |
493 | return_value = CURL_FORMADD_OPTION_TWICE; |
494 | else |
495 | current_form->contentheader = list; |
496 | |
497 | break; |
498 | } |
499 | case CURLFORM_FILENAME: |
500 | case CURLFORM_BUFFER: |
501 | { |
502 | const char *filename = array_state?array_value: |
503 | va_arg(params, char *); |
504 | if(current_form->showfilename) |
505 | return_value = CURL_FORMADD_OPTION_TWICE; |
506 | else { |
507 | current_form->showfilename = strdup(filename); |
508 | if(!current_form->showfilename) |
509 | return_value = CURL_FORMADD_MEMORY; |
510 | else |
511 | current_form->showfilename_alloc = TRUE; |
512 | } |
513 | break; |
514 | } |
515 | default: |
516 | return_value = CURL_FORMADD_UNKNOWN_OPTION; |
517 | break; |
518 | } |
519 | } |
520 | |
521 | if(CURL_FORMADD_OK != return_value) { |
522 | /* On error, free allocated fields for all nodes of the FormInfo linked |
523 | list without deallocating nodes. List nodes are deallocated later on */ |
524 | FormInfo *ptr; |
525 | for(ptr = first_form; ptr != NULL; ptr = ptr->more) { |
526 | if(ptr->name_alloc) { |
527 | Curl_safefree(ptr->name); |
528 | ptr->name_alloc = FALSE; |
529 | } |
530 | if(ptr->value_alloc) { |
531 | Curl_safefree(ptr->value); |
532 | ptr->value_alloc = FALSE; |
533 | } |
534 | if(ptr->contenttype_alloc) { |
535 | Curl_safefree(ptr->contenttype); |
536 | ptr->contenttype_alloc = FALSE; |
537 | } |
538 | if(ptr->showfilename_alloc) { |
539 | Curl_safefree(ptr->showfilename); |
540 | ptr->showfilename_alloc = FALSE; |
541 | } |
542 | } |
543 | } |
544 | |
545 | if(CURL_FORMADD_OK == return_value) { |
546 | /* go through the list, check for completeness and if everything is |
547 | * alright add the HttpPost item otherwise set return_value accordingly */ |
548 | |
549 | post = NULL; |
550 | for(form = first_form; |
551 | form != NULL; |
552 | form = form->more) { |
553 | if(((!form->name || !form->value) && !post) || |
554 | ( (form->contentslength) && |
555 | (form->flags & HTTPPOST_FILENAME) ) || |
556 | ( (form->flags & HTTPPOST_FILENAME) && |
557 | (form->flags & HTTPPOST_PTRCONTENTS) ) || |
558 | |
559 | ( (!form->buffer) && |
560 | (form->flags & HTTPPOST_BUFFER) && |
561 | (form->flags & HTTPPOST_PTRBUFFER) ) || |
562 | |
563 | ( (form->flags & HTTPPOST_READFILE) && |
564 | (form->flags & HTTPPOST_PTRCONTENTS) ) |
565 | ) { |
566 | return_value = CURL_FORMADD_INCOMPLETE; |
567 | break; |
568 | } |
569 | if(((form->flags & HTTPPOST_FILENAME) || |
570 | (form->flags & HTTPPOST_BUFFER)) && |
571 | !form->contenttype) { |
572 | char *f = (form->flags & HTTPPOST_BUFFER)? |
573 | form->showfilename : form->value; |
574 | char const *type; |
575 | type = Curl_mime_contenttype(f); |
576 | if(!type) |
577 | type = prevtype; |
578 | if(!type) |
579 | type = FILE_CONTENTTYPE_DEFAULT; |
580 | |
581 | /* our contenttype is missing */ |
582 | form->contenttype = strdup(type); |
583 | if(!form->contenttype) { |
584 | return_value = CURL_FORMADD_MEMORY; |
585 | break; |
586 | } |
587 | form->contenttype_alloc = TRUE; |
588 | } |
589 | if(form->name && form->namelength) { |
590 | /* Name should not contain nul bytes. */ |
591 | size_t i; |
592 | for(i = 0; i < form->namelength; i++) |
593 | if(!form->name[i]) { |
594 | return_value = CURL_FORMADD_NULL; |
595 | break; |
596 | } |
597 | if(return_value != CURL_FORMADD_OK) |
598 | break; |
599 | } |
600 | if(!(form->flags & HTTPPOST_PTRNAME) && |
601 | (form == first_form) ) { |
602 | /* Note that there's small risk that form->name is NULL here if the |
603 | app passed in a bad combo, so we better check for that first. */ |
604 | if(form->name) { |
605 | /* copy name (without strdup; possibly not nul-terminated) */ |
606 | form->name = Curl_memdup(form->name, form->namelength? |
607 | form->namelength: |
608 | strlen(form->name) + 1); |
609 | } |
610 | if(!form->name) { |
611 | return_value = CURL_FORMADD_MEMORY; |
612 | break; |
613 | } |
614 | form->name_alloc = TRUE; |
615 | } |
616 | if(!(form->flags & (HTTPPOST_FILENAME | HTTPPOST_READFILE | |
617 | HTTPPOST_PTRCONTENTS | HTTPPOST_PTRBUFFER | |
618 | HTTPPOST_CALLBACK)) && form->value) { |
619 | /* copy value (without strdup; possibly contains null characters) */ |
620 | size_t clen = (size_t) form->contentslength; |
621 | if(!clen) |
622 | clen = strlen(form->value) + 1; |
623 | |
624 | form->value = Curl_memdup(form->value, clen); |
625 | |
626 | if(!form->value) { |
627 | return_value = CURL_FORMADD_MEMORY; |
628 | break; |
629 | } |
630 | form->value_alloc = TRUE; |
631 | } |
632 | post = AddHttpPost(form->name, form->namelength, |
633 | form->value, form->contentslength, |
634 | form->buffer, form->bufferlength, |
635 | form->contenttype, form->flags, |
636 | form->contentheader, form->showfilename, |
637 | form->userp, |
638 | post, httppost, |
639 | last_post); |
640 | |
641 | if(!post) { |
642 | return_value = CURL_FORMADD_MEMORY; |
643 | break; |
644 | } |
645 | |
646 | if(form->contenttype) |
647 | prevtype = form->contenttype; |
648 | } |
649 | if(CURL_FORMADD_OK != return_value) { |
650 | /* On error, free allocated fields for nodes of the FormInfo linked |
651 | list which are not already owned by the httppost linked list |
652 | without deallocating nodes. List nodes are deallocated later on */ |
653 | FormInfo *ptr; |
654 | for(ptr = form; ptr != NULL; ptr = ptr->more) { |
655 | if(ptr->name_alloc) { |
656 | Curl_safefree(ptr->name); |
657 | ptr->name_alloc = FALSE; |
658 | } |
659 | if(ptr->value_alloc) { |
660 | Curl_safefree(ptr->value); |
661 | ptr->value_alloc = FALSE; |
662 | } |
663 | if(ptr->contenttype_alloc) { |
664 | Curl_safefree(ptr->contenttype); |
665 | ptr->contenttype_alloc = FALSE; |
666 | } |
667 | if(ptr->showfilename_alloc) { |
668 | Curl_safefree(ptr->showfilename); |
669 | ptr->showfilename_alloc = FALSE; |
670 | } |
671 | } |
672 | } |
673 | } |
674 | |
675 | /* Always deallocate FormInfo linked list nodes without touching node |
676 | fields given that these have either been deallocated or are owned |
677 | now by the httppost linked list */ |
678 | while(first_form) { |
679 | FormInfo *ptr = first_form->more; |
680 | free(first_form); |
681 | first_form = ptr; |
682 | } |
683 | |
684 | return return_value; |
685 | } |
686 | |
687 | /* |
688 | * curl_formadd() is a public API to add a section to the multipart formpost. |
689 | * |
690 | * @unittest: 1308 |
691 | */ |
692 | |
693 | CURLFORMcode curl_formadd(struct curl_httppost **httppost, |
694 | struct curl_httppost **last_post, |
695 | ...) |
696 | { |
697 | va_list arg; |
698 | CURLFORMcode result; |
699 | va_start(arg, last_post); |
700 | result = FormAdd(httppost, last_post, arg); |
701 | va_end(arg); |
702 | return result; |
703 | } |
704 | |
705 | /* |
706 | * curl_formget() |
707 | * Serialize a curl_httppost struct. |
708 | * Returns 0 on success. |
709 | * |
710 | * @unittest: 1308 |
711 | */ |
712 | int curl_formget(struct curl_httppost *form, void *arg, |
713 | curl_formget_callback append) |
714 | { |
715 | CURLcode result; |
716 | curl_mimepart toppart; |
717 | |
718 | Curl_mime_initpart(&toppart, NULL); /* default form is empty */ |
719 | result = Curl_getformdata(NULL, &toppart, form, NULL); |
720 | if(!result) |
721 | result = Curl_mime_prepare_headers(&toppart, "multipart/form-data" , |
722 | NULL, MIMESTRATEGY_FORM); |
723 | |
724 | while(!result) { |
725 | char buffer[8192]; |
726 | size_t nread = Curl_mime_read(buffer, 1, sizeof(buffer), &toppart); |
727 | |
728 | if(!nread) |
729 | break; |
730 | |
731 | switch(nread) { |
732 | default: |
733 | if(append(arg, buffer, nread) != nread) |
734 | result = CURLE_READ_ERROR; |
735 | break; |
736 | case CURL_READFUNC_ABORT: |
737 | case CURL_READFUNC_PAUSE: |
738 | break; |
739 | } |
740 | } |
741 | |
742 | Curl_mime_cleanpart(&toppart); |
743 | return (int) result; |
744 | } |
745 | |
746 | /* |
747 | * curl_formfree() is an external function to free up a whole form post |
748 | * chain |
749 | */ |
750 | void curl_formfree(struct curl_httppost *form) |
751 | { |
752 | struct curl_httppost *next; |
753 | |
754 | if(!form) |
755 | /* no form to free, just get out of this */ |
756 | return; |
757 | |
758 | do { |
759 | next = form->next; /* the following form line */ |
760 | |
761 | /* recurse to sub-contents */ |
762 | curl_formfree(form->more); |
763 | |
764 | if(!(form->flags & HTTPPOST_PTRNAME)) |
765 | free(form->name); /* free the name */ |
766 | if(!(form->flags & |
767 | (HTTPPOST_PTRCONTENTS|HTTPPOST_BUFFER|HTTPPOST_CALLBACK)) |
768 | ) |
769 | free(form->contents); /* free the contents */ |
770 | free(form->contenttype); /* free the content type */ |
771 | free(form->showfilename); /* free the faked file name */ |
772 | free(form); /* free the struct */ |
773 | form = next; |
774 | } while(form); /* continue */ |
775 | } |
776 | |
777 | |
778 | /* Set mime part name, taking care of non nul-terminated name string. */ |
779 | static CURLcode setname(curl_mimepart *part, const char *name, size_t len) |
780 | { |
781 | char *zname; |
782 | CURLcode res; |
783 | |
784 | if(!name || !len) |
785 | return curl_mime_name(part, name); |
786 | zname = malloc(len + 1); |
787 | if(!zname) |
788 | return CURLE_OUT_OF_MEMORY; |
789 | memcpy(zname, name, len); |
790 | zname[len] = '\0'; |
791 | res = curl_mime_name(part, zname); |
792 | free(zname); |
793 | return res; |
794 | } |
795 | |
796 | /* |
797 | * Curl_getformdata() converts a linked list of "meta data" into a mime |
798 | * structure. The input list is in 'post', while the output is stored in |
799 | * mime part at '*finalform'. |
800 | * |
801 | * This function will not do a failf() for the potential memory failures but |
802 | * should for all other errors it spots. Just note that this function MAY get |
803 | * a NULL pointer in the 'data' argument. |
804 | */ |
805 | |
806 | CURLcode Curl_getformdata(struct Curl_easy *data, |
807 | curl_mimepart *finalform, |
808 | struct curl_httppost *post, |
809 | curl_read_callback fread_func) |
810 | { |
811 | CURLcode result = CURLE_OK; |
812 | curl_mime *form = NULL; |
813 | curl_mimepart *part; |
814 | struct curl_httppost *file; |
815 | |
816 | Curl_mime_cleanpart(finalform); /* default form is empty */ |
817 | |
818 | if(!post) |
819 | return result; /* no input => no output! */ |
820 | |
821 | form = curl_mime_init(data); |
822 | if(!form) |
823 | result = CURLE_OUT_OF_MEMORY; |
824 | |
825 | if(!result) |
826 | result = curl_mime_subparts(finalform, form); |
827 | |
828 | /* Process each top part. */ |
829 | for(; !result && post; post = post->next) { |
830 | /* If we have more than a file here, create a mime subpart and fill it. */ |
831 | curl_mime *multipart = form; |
832 | if(post->more) { |
833 | part = curl_mime_addpart(form); |
834 | if(!part) |
835 | result = CURLE_OUT_OF_MEMORY; |
836 | if(!result) |
837 | result = setname(part, post->name, post->namelength); |
838 | if(!result) { |
839 | multipart = curl_mime_init(data); |
840 | if(!multipart) |
841 | result = CURLE_OUT_OF_MEMORY; |
842 | } |
843 | if(!result) |
844 | result = curl_mime_subparts(part, multipart); |
845 | } |
846 | |
847 | /* Generate all the part contents. */ |
848 | for(file = post; !result && file; file = file->more) { |
849 | /* Create the part. */ |
850 | part = curl_mime_addpart(multipart); |
851 | if(!part) |
852 | result = CURLE_OUT_OF_MEMORY; |
853 | |
854 | /* Set the headers. */ |
855 | if(!result) |
856 | result = curl_mime_headers(part, file->contentheader, 0); |
857 | |
858 | /* Set the content type. */ |
859 | if(!result && file->contenttype) |
860 | result = curl_mime_type(part, file->contenttype); |
861 | |
862 | /* Set field name. */ |
863 | if(!result && !post->more) |
864 | result = setname(part, post->name, post->namelength); |
865 | |
866 | /* Process contents. */ |
867 | if(!result) { |
868 | curl_off_t clen = post->contentslength; |
869 | |
870 | if(post->flags & CURL_HTTPPOST_LARGE) |
871 | clen = post->contentlen; |
872 | if(!clen) |
873 | clen = -1; |
874 | |
875 | if(post->flags & (HTTPPOST_FILENAME | HTTPPOST_READFILE)) { |
876 | if(!strcmp(file->contents, "-" )) { |
877 | /* There are a few cases where the code below won't work; in |
878 | particular, freopen(stdin) by the caller is not guaranteed |
879 | to result as expected. This feature has been kept for backward |
880 | compatibility: use of "-" pseudo file name should be avoided. */ |
881 | result = curl_mime_data_cb(part, (curl_off_t) -1, |
882 | (curl_read_callback) fread, |
883 | CURLX_FUNCTION_CAST(curl_seek_callback, |
884 | fseek), |
885 | NULL, (void *) stdin); |
886 | } |
887 | else |
888 | result = curl_mime_filedata(part, file->contents); |
889 | if(!result && (post->flags & HTTPPOST_READFILE)) |
890 | result = curl_mime_filename(part, NULL); |
891 | } |
892 | else if(post->flags & HTTPPOST_BUFFER) |
893 | result = curl_mime_data(part, post->buffer, |
894 | post->bufferlength? post->bufferlength: -1); |
895 | else if(post->flags & HTTPPOST_CALLBACK) |
896 | /* the contents should be read with the callback and the size is set |
897 | with the contentslength */ |
898 | result = curl_mime_data_cb(part, clen, |
899 | fread_func, NULL, NULL, post->userp); |
900 | else { |
901 | result = curl_mime_data(part, post->contents, (ssize_t) clen); |
902 | #ifdef CURL_DOES_CONVERSIONS |
903 | /* Convert textual contents now. */ |
904 | if(!result && data && part->datasize) |
905 | result = Curl_convert_to_network(data, part->data, part->datasize); |
906 | #endif |
907 | } |
908 | } |
909 | |
910 | /* Set fake file name. */ |
911 | if(!result && post->showfilename) |
912 | if(post->more || (post->flags & (HTTPPOST_FILENAME | HTTPPOST_BUFFER | |
913 | HTTPPOST_CALLBACK))) |
914 | result = curl_mime_filename(part, post->showfilename); |
915 | } |
916 | } |
917 | |
918 | if(result) |
919 | Curl_mime_cleanpart(finalform); |
920 | |
921 | return result; |
922 | } |
923 | |
924 | #else |
925 | /* if disabled */ |
926 | CURLFORMcode curl_formadd(struct curl_httppost **httppost, |
927 | struct curl_httppost **last_post, |
928 | ...) |
929 | { |
930 | (void)httppost; |
931 | (void)last_post; |
932 | return CURL_FORMADD_DISABLED; |
933 | } |
934 | |
935 | int curl_formget(struct curl_httppost *form, void *arg, |
936 | curl_formget_callback append) |
937 | { |
938 | (void) form; |
939 | (void) arg; |
940 | (void) append; |
941 | return CURL_FORMADD_DISABLED; |
942 | } |
943 | |
944 | void curl_formfree(struct curl_httppost *form) |
945 | { |
946 | (void)form; |
947 | /* does nothing HTTP is disabled */ |
948 | } |
949 | |
950 | #endif /* if disabled */ |
951 | |