3 // Copyright (c) 1996-2023 by the citadel.org team
5 // This program is open source software. Use, duplication, or
6 // disclosure are subject to the GNU General Public License v3.
10 Array *upload_list = NULL; // all files uploaded to this webcit instance
11 pthread_mutex_t upload_list_mutex = PTHREAD_MUTEX_INITIALIZER; // Lock it before modifying
14 // This function is called by the MIME parser to handle data uploaded by the browser.
15 void upload_handler(char *name, char *filename, char *partnum, char *disp,
16 void *content, char *cbtype, char *cbcharset,
17 size_t length, char *encoding, char *cbid, void *userdata)
19 struct uploaded_file u;
21 // create a random ID for the attachment
22 for (int i=0; i<sizeof(u.id); ++i) {
23 u.id[i] = (rand() % 26) + 'a';
25 u.id[sizeof(u.id)-1] = 0;
28 "upload_handler: name=%s, filename=%s, partnum=%s, disp=%s, cbtype=%s, cbcharset=%s, length=%ld, encoding=%s, cbid=%s",
29 name, filename, partnum, disp, cbtype, cbcharset, length, encoding, cbid
32 safestrncpy(u.filename, filename, sizeof(u.filename));
33 safestrncpy(u.content_type, cbtype, sizeof(u.content_type));
36 // Write the upload to a file that we can access later when the user saves the message.
37 // tmpfile() creates a file with zero links in the directory, so it will be deleted when it is closed.
40 syslog(LOG_ERR, "upload: %m");
43 if (fwrite(content, length, 1, u.fp) != 1) {
44 syslog(LOG_ERR, "upload: %m");
49 // Add it to the list of uploads the server is holding.
50 pthread_mutex_lock(&upload_list_mutex);
51 if (upload_list == NULL) {
52 upload_list = array_new(sizeof(struct uploaded_file));
54 array_append(upload_list, &u);
55 pthread_mutex_unlock(&upload_list_mutex);
57 for (int i=0; i<array_len(upload_list); ++i) {
58 memcpy(&u, array_get_element_at(upload_list, i), sizeof(struct uploaded_file));
61 // Create a JSON object describing this upload
62 JsonValue *j_one_upload = NewJsonObject(HKEY(""));
63 JsonObjectAppend(j_one_upload, NewJsonPlainString(HKEY("ref"), u.id, -1));
64 JsonObjectAppend(j_one_upload, NewJsonPlainString(HKEY("uploadfilename"), u.filename, -1));
65 JsonObjectAppend(j_one_upload, NewJsonPlainString(HKEY("contenttype"), u.content_type, -1));
66 JsonObjectAppend(j_one_upload, NewJsonNumber(HKEY("contentlength"), u.length));
68 // ...and attach it to the array of uploads
69 JsonValue *j_uploads = (JsonValue *) userdata;
70 JsonArrayAppend(j_uploads, j_one_upload);
75 void upload_files(struct http_transaction *h, struct ctdlsession *c) {
76 // FIXME reject uploads if we're not logged in
78 // This will be a JSON Array of all files that were uploaded during this HTTP transaction.
79 // Normally the browser will upload only one file per transaction, but that behavior is not guaranteed.
80 JsonValue *j_uploads = NewJsonArray(HKEY(""));
82 // h->request_body_with_synth_headers will contain the upload(s) in MIME format including headers
83 mime_parser(h->request_body_with_synth_headers, (h->request_body+h->request_body_length), *upload_handler, NULL, NULL, j_uploads, 0);
85 // probably do something more clever here
86 h->response_code = 200;
87 h->response_string = strdup("OK");
89 // send back a JSON array of all files uploaded
90 StrBuf *sj = NewStrBuf();
91 SerializeJson(sj, j_uploads, 1); // '1' == free the source object
92 add_response_header(h, strdup("Content-type"), strdup("application/json"));
93 h->response_code = 200;
94 h->response_string = strdup("OK");
95 h->response_body_length = StrLength(sj);
96 h->response_body = SmashStrBuf(&sj);
97 syslog(LOG_DEBUG, "upload: %s", h->response_body);
101 // Caller has requested /ctdl/p or /ctdl/p/ but we still have to dispatch based on the method
102 void ctdl_p_base(struct http_transaction *h, struct ctdlsession *c) {
103 upload_files(h, c); // we should only do this for POST requests
107 // delete an uploaded item
108 void delete_upload(struct uploaded_file this_one) {
110 struct uploaded_file *u;
112 pthread_mutex_lock(&upload_list_mutex);
113 for (i=0; i<array_len(upload_list); ++i) {
114 u = (struct uploaded_file *) array_get_element_at(upload_list, i), sizeof(struct uploaded_file);
115 if (!strcmp(u->id, this_one.id)) {
116 fclose(u->fp); // this deletes the file because it has 0 links
117 array_delete_element_at(upload_list, i);
118 i = array_len(upload_list) + 1; // Go out of scope; we're done here
121 pthread_mutex_unlock(&upload_list_mutex);
125 // DAV delete an uploaded item
126 void dav_delete_upload(struct http_transaction *h, struct ctdlsession *c, struct uploaded_file this_one) {
127 delete_upload(this_one);
132 // Remove an uploaded item from the upload_list. Caller now owns the file handle and is responsible for closing it.
133 struct uploaded_file pop_upload(char *id) {
135 struct uploaded_file *u;
136 struct uploaded_file ret;
138 memset(&ret, 0, sizeof(struct uploaded_file));
140 pthread_mutex_lock(&upload_list_mutex);
141 for (i=0; i<array_len(upload_list); ++i) {
142 u = (struct uploaded_file *) array_get_element_at(upload_list, i), sizeof(struct uploaded_file);
143 if (!strcmp(u->id, id)) {
145 array_delete_element_at(upload_list, i);
146 i = array_len(upload_list) + 1; // Go out of scope; we're done here
149 pthread_mutex_unlock(&upload_list_mutex);
151 return(ret); // ret will be all-zeroes if we didn't find it
155 // When reloading attachments already in an existing message, accept only parts that are tagged as attachments.
156 void attachment_filter(char *name, char *filename, char *partnum, char *disp,
157 void *content, char *cbtype, char *cbcharset,
158 size_t length, char *encoding, char *cbid, void *userdata)
160 struct uploaded_file u;
162 if (!strcasecmp(disp, "attachment")) {
163 upload_handler(name, filename, partnum, disp, content, cbtype, cbcharset, length, encoding, cbid, userdata);
168 // Load the attachments from an existing message. This is typically used when forwarding a message,
169 // so the attachments don't have to be sent out to the browser and back.
170 void load_attachments_from_message(struct http_transaction *h, struct ctdlsession *c, char *name) {
171 syslog(LOG_DEBUG, "\033[33mload_attachments_from_message: method is \033[35m%s\033[33m, name is \033[33m%s\033[0m", h->method, name);
176 ctdl_printf(c, "MSG2 %ld", atol(name));
177 ctdl_readline(c, buf, sizeof buf);
183 JsonValue *j_uploads = NewJsonArray(HKEY(""));
185 while (ctdl_readline(c, buf, sizeof buf), strcmp(buf, "000")) {
186 StrBufAppendPrintf(Body, "%s\n", buf);
188 char *raw_message = SmashStrBuf(&Body);
189 mime_parser(raw_message, NULL, *attachment_filter, NULL, NULL, j_uploads, 0);
192 // probably do something more clever here
193 h->response_code = 200;
194 h->response_string = strdup("OK");
196 // send back a JSON array of all files uploaded
197 StrBuf *sj = NewStrBuf();
198 SerializeJson(sj, j_uploads, 1); // '1' == free the source object
199 add_response_header(h, strdup("Content-type"), strdup("application/json"));
200 h->response_code = 200;
201 h->response_string = strdup("OK");
202 h->response_body_length = StrLength(sj);
203 h->response_body = SmashStrBuf(&sj);
204 syslog(LOG_DEBUG, "upload: %s", h->response_body);
208 // Handle operations on a specific upload
209 void specific_upload(struct http_transaction *h, struct ctdlsession *c, char *name) {
211 struct uploaded_file *u;
212 struct uploaded_file this_one;
214 syslog(LOG_DEBUG, "\033[33mspecific_upload: method is \033[35m%s\033[33m, name is \033[33m%s\033[0m", h->method, name);
216 // GET of a msgnum is a request to load the attachments from an existing message.
217 if ( (!strcasecmp(h->method, "GET")) && (atol(name) > 0) ) {
218 load_attachments_from_message(h, c, name);
222 if (upload_list == NULL) {
227 memset(&this_one, 0, sizeof(struct uploaded_file));
228 pthread_mutex_lock(&upload_list_mutex);
229 for (i=0; i<array_len(upload_list); ++i) {
230 u = (struct uploaded_file *) array_get_element_at(upload_list, i), sizeof(struct uploaded_file);
231 if (!strcmp(u->id, name)) {
232 memcpy(&this_one, u, sizeof(struct uploaded_file));
233 i = array_len(upload_list) + 1; // Go out of scope; we're done here
236 pthread_mutex_unlock(&upload_list_mutex);
238 // If we found a matching ID, now dispatch based on the HTTP method.
240 if (IsEmptyStr(this_one.id)) { // didn't find a match
243 else if (!strcasecmp(h->method, "GET")) { // fetch the item
246 else if (!strcasecmp(h->method, "DELETE")) { // delete the item
247 dav_delete_upload(h, c, this_one);
249 else { // unsupported method
255 // Dispatcher for paths starting with /ctdl/p/
256 void ctdl_p(struct http_transaction *h, struct ctdlsession *c) {
259 if (num_tokens(h->url, '/') == 3) { // /ctdl/p
264 extract_token(buf, h->url, 3, '/', sizeof buf);
265 if (num_tokens(h->url, '/') == 4) {
266 if (IsEmptyStr(buf)) {
267 ctdl_p_base(h, c); // /ctdl/p/
270 specific_upload(h, c, &h->url[8]);
275 // If we get to this point, the client requested an action we don't know how to perform.