4 * Implements the FETCH command in IMAP.
5 * This command is way too convoluted. Marc Crispin is a fscking idiot.
18 #include <sys/types.h>
27 #include "sysdep_decls.h"
28 #include "citserver.h"
31 #include "dynloader.h"
38 #include "internet_addressing.h"
39 #include "serv_imap.h"
40 #include "imap_tools.h"
41 #include "imap_fetch.h"
47 * Individual field functions for imap_do_fetch_msg() ...
52 void imap_fetch_uid(int seq) {
53 cprintf("UID %ld", IMAP->msgids[seq-1]);
56 void imap_fetch_internaldate(struct CtdlMessage *msg) {
60 if (msg->cm_fields['T'] != NULL) {
61 msgdate = atol(msg->cm_fields['T']);
67 datestring(buf, msgdate, DATESTRING_IMAP);
68 cprintf("INTERNALDATE \"%s\"", buf);
73 * imap_do_fetch() calls imap_do_fetch_msg() to output the deta of an
74 * individual message, once it has been successfully loaded from disk.
76 void imap_do_fetch_msg(int seq, struct CtdlMessage *msg,
77 int num_items, char **itemlist) {
80 cprintf("* %d FETCH (", seq);
82 for (i=0; i<num_items; ++i) {
84 if (!strncasecmp(itemlist[i], "BODY[", 5)) {
85 /* FIXME do something here */
87 else if (!strncasecmp(itemlist[i], "BODY.PEEK[", 10)) {
88 /* FIXME do something here */
90 else if (!strcasecmp(itemlist[i], "BODYSTRUCTURE")) {
91 /* FIXME do something here */
93 else if (!strcasecmp(itemlist[i], "ENVELOPE")) {
94 /* FIXME do something here */
96 else if (!strcasecmp(itemlist[i], "FLAGS")) {
97 /* FIXME do something here */
99 else if (!strcasecmp(itemlist[i], "INTERNALDATE")) {
100 imap_fetch_internaldate(msg);
102 else if (!strcasecmp(itemlist[i], "RFC822")) {
103 /* FIXME do something here */
105 else if (!strcasecmp(itemlist[i], "RFC822.HEADER")) {
106 /* FIXME do something here */
108 else if (!strcasecmp(itemlist[i], "RFC822.SIZE")) {
109 /* FIXME do something here */
111 else if (!strcasecmp(itemlist[i], "RFC822.TEXT")) {
112 /* FIXME do something here */
114 else if (!strcasecmp(itemlist[i], "UID")) {
118 if (i != num_items-1) cprintf(" ");
127 * imap_fetch() calls imap_do_fetch() to do its actual work, once it's
128 * validated and boiled down the request a bit.
130 void imap_do_fetch(int lo, int hi, int num_items, char **itemlist) {
132 struct CtdlMessage *msg;
134 for (i=0; i<num_items; ++i) {
135 lprintf(9, "* item[%d] = <%s>\r\n", i, itemlist[i]);
138 for (i = lo; i <= hi; ++i) {
139 msg = CtdlFetchMessage(IMAP->msgids[i-1]);
141 imap_do_fetch_msg(i, msg, num_items, itemlist);
142 CtdlFreeMessage(msg);
145 cprintf("* %d FETCH <internal error>\r\n", i);
153 * Back end for imap_handle_macros()
154 * Note that this function *only* looks at the beginning of the string. It
155 * is not a generic search-and-replace function.
157 void imap_macro_replace(char *str, char *find, char *replace) {
160 if (!strncasecmp(str, find, strlen(find))) {
161 if (str[strlen(find)]==' ') {
162 strcpy(holdbuf, &str[strlen(find)+1]);
163 strcpy(str, replace);
165 strcat(str, holdbuf);
167 if (str[strlen(find)]==0) {
168 strcpy(holdbuf, &str[strlen(find)+1]);
169 strcpy(str, replace);
177 * Handle macros embedded in FETCH data items.
178 * (What the heck are macros doing in a wire protocol? Are we trying to save
179 * the computer at the other end the trouble of typing a lot of characters?)
181 void imap_handle_macros(char *str) {
185 for (i=0; i<strlen(str); ++i) {
186 if (str[i]=='(') ++nest;
187 if (str[i]=='[') ++nest;
188 if (str[i]=='<') ++nest;
189 if (str[i]=='{') ++nest;
190 if (str[i]==')') --nest;
191 if (str[i]==']') --nest;
192 if (str[i]=='>') --nest;
193 if (str[i]=='}') --nest;
196 imap_macro_replace(&str[i],
198 "FLAGS INTERNALDATE RFC822.SIZE ENVELOPE"
200 imap_macro_replace(&str[i],
204 imap_macro_replace(&str[i],
206 "FLAGS INTERNALDATE RFC822.SIZE"
208 imap_macro_replace(&str[i],
210 "FLAGS INTERNALDATE RFC822.SIZE ENVELOPE BODY"
218 * Break out the data items requested, possibly a parenthesized list.
219 * Returns the number of data items, or -1 if the list is invalid.
220 * NOTE: this function alters the string it is fed, and uses it as a buffer
221 * to hold the data for the pointers it returns.
223 int imap_extract_data_items(char **argv, char *items) {
229 /* Convert all whitespace to ordinary space characters. */
230 for (i=0; i<strlen(items); ++i) {
231 if (isspace(items[i])) items[i]=' ';
234 /* Strip leading and trailing whitespace, then strip leading and
235 * trailing parentheses if it's a list
238 if ( (items[0]=='(') && (items[strlen(items)-1]==')') ) {
239 items[strlen(items)-1] = 0;
240 strcpy(items, &items[1]);
244 /* Parse any macro data items */
245 imap_handle_macros(items);
248 * Now break out the data items. We throw in one trailing space in
249 * order to avoid having to break out the last one manually.
253 initial_len = strlen(items);
254 for (i=0; i<initial_len; ++i) {
255 if (items[i]=='(') ++nest;
256 if (items[i]=='[') ++nest;
257 if (items[i]=='<') ++nest;
258 if (items[i]=='{') ++nest;
259 if (items[i]==')') --nest;
260 if (items[i]==']') --nest;
261 if (items[i]=='>') --nest;
262 if (items[i]=='}') --nest;
264 if (nest <= 0) if (items[i]==' ') {
266 argv[num_items++] = start;
278 * This function is called by the main command loop.
280 void imap_fetch(int num_parms, char *parms[]) {
283 char lostr[1024], histr[1024], items[1024];
289 cprintf("%s BAD invalid parameters\r\n", parms[0]);
293 extract_token(lostr, parms[2], 0, ':');
295 extract_token(histr, parms[2], 1, ':');
298 if ( (lo < 1) || (hi < 1) || (lo > hi) || (hi > IMAP->num_msgs) ) {
299 cprintf("%s BAD invalid sequence numbers %d:%d\r\n",
305 for (i=3; i<num_parms; ++i) {
306 strcat(items, parms[i]);
307 if (i < (num_parms-1)) strcat(items, " ");
310 num_items = imap_extract_data_items(itemlist, items);
312 cprintf("%s BAD invalid data item list\r\n", parms[0]);
316 imap_do_fetch(lo, hi, num_items, itemlist);
317 cprintf("%s OK FETCH completed\r\n", parms[0]);