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 syslog(LOG_DEBUG, "upload_handler()");
20 syslog(LOG_DEBUG, " name: %s", name);
21 syslog(LOG_DEBUG, " filename: %s", filename);
22 syslog(LOG_DEBUG, " part number: %s", partnum);
23 syslog(LOG_DEBUG, " disposition: %s", disp);
24 syslog(LOG_DEBUG, "content type: %s", cbtype);
25 syslog(LOG_DEBUG, " char set: %s", cbcharset);
26 syslog(LOG_DEBUG, " length: %ld", length);
27 syslog(LOG_DEBUG, " encoding: %s", encoding);
28 syslog(LOG_DEBUG, " id: %s", cbid);
30 struct uploaded_file u;
32 // create a random ID for the attachment
33 for (int i=0; i<sizeof(u.id); ++i) {
34 u.id[i] = (rand() % 26) + 'a';
36 u.id[sizeof(u.id)-1] = 0;
38 safestrncpy(u.filename, filename, sizeof(u.filename));
39 safestrncpy(u.content_type, cbtype, sizeof(u.content_type));
42 // Write the upload to a file that we can access later when the user saves the message.
43 // tmpfile() creates a file with zero links in the directory, so it will be deleted when it is closed.
46 syslog(LOG_ERR, "upload: %m");
49 if (fwrite(content, length, 1, u.fp) != 1) {
50 syslog(LOG_ERR, "upload: %m");
55 // Add it to the list of uploads the server is holding.
56 pthread_mutex_lock(&upload_list_mutex);
57 if (upload_list == NULL) {
58 upload_list = array_new(sizeof(struct uploaded_file));
60 array_append(upload_list, &u);
61 pthread_mutex_unlock(&upload_list_mutex);
63 for (int i=0; i<array_len(upload_list); ++i) {
64 memcpy(&u, array_get_element_at(upload_list, i), sizeof(struct uploaded_file));
65 syslog(LOG_DEBUG, "%d: %s %s", i, u.id, u.filename);
68 // Create a JSON object describing this upload
69 JsonValue *j_one_upload = NewJsonObject(HKEY(""));
70 JsonObjectAppend(j_one_upload, NewJsonPlainString(HKEY("ref"), u.id, -1));
71 JsonObjectAppend(j_one_upload, NewJsonPlainString(HKEY("uploadfilename"), u.filename, -1));
72 JsonObjectAppend(j_one_upload, NewJsonPlainString(HKEY("contenttype"), u.content_type, -1));
73 JsonObjectAppend(j_one_upload, NewJsonNumber(HKEY("contentlength"), u.length));
75 // ...and attach it to the array of uploads
76 JsonValue *j_uploads = (JsonValue *) userdata;
77 JsonArrayAppend(j_uploads, j_one_upload);
81 void upload_files(struct http_transaction *h, struct ctdlsession *c) {
82 // FIXME reject uploads if we're not logged in
84 // This will be a JSON Array of all files that were uploaded during this HTTP transaction.
85 // Normally the browser will upload only one file per transaction, but that behavior is not guaranteed.
86 JsonValue *j_uploads = NewJsonArray(HKEY(""));
88 // h->request_body will contain the upload(s) in MIME format
89 mime_parser(h->request_body, (h->request_body + h->request_body_length), *upload_handler, NULL, NULL, j_uploads, 0);
91 // probably do something more clever here
92 h->response_code = 200;
93 h->response_string = strdup("OK");
95 // send back a JSON array of all files uploaded
96 StrBuf *sj = NewStrBuf();
97 SerializeJson(sj, j_uploads, 1); // '1' == free the source object
98 add_response_header(h, strdup("Content-type"), strdup("application/json"));
99 h->response_code = 200;
100 h->response_string = strdup("OK");
101 h->response_body_length = StrLength(sj);
102 h->response_body = SmashStrBuf(&sj);
106 // Caller has requested /ctdl/p or /ctdl/p/ but we still have to dispatch based on the method
107 void ctdl_p_base(struct http_transaction *h, struct ctdlsession *c) {
108 upload_files(h, c); // we should only do this for POST requests
112 // delete an uploaded item
113 void delete_upload(struct uploaded_file this_one) {
115 struct uploaded_file *u;
117 pthread_mutex_lock(&upload_list_mutex);
118 for (i=0; i<array_len(upload_list); ++i) {
119 u = (struct uploaded_file *) array_get_element_at(upload_list, i), sizeof(struct uploaded_file);
120 if (!strcmp(u->id, this_one.id)) {
121 fclose(u->fp); // this deletes the file because it has 0 links
122 array_delete_element_at(upload_list, i);
123 i = array_len(upload_list) + 1; // Go out of scope; we're done here
126 pthread_mutex_unlock(&upload_list_mutex);
130 // DAV delete an uploaded item
131 void dav_delete_upload(struct http_transaction *h, struct ctdlsession *c, struct uploaded_file this_one) {
132 delete_upload(this_one);
137 // Remove an uploaded item from the upload_list. Caller now owns the file handle and is responsible for closing it.
138 struct uploaded_file pop_upload(char *id) {
140 struct uploaded_file *u;
141 struct uploaded_file ret;
143 memset(&ret, 0, sizeof(struct uploaded_file));
145 pthread_mutex_lock(&upload_list_mutex);
146 for (i=0; i<array_len(upload_list); ++i) {
147 u = (struct uploaded_file *) array_get_element_at(upload_list, i), sizeof(struct uploaded_file);
148 if (!strcmp(u->id, id)) {
150 array_delete_element_at(upload_list, i);
151 i = array_len(upload_list) + 1; // Go out of scope; we're done here
154 pthread_mutex_unlock(&upload_list_mutex);
156 return(ret); // ret will be all-zeroes if we didn't find it
160 // Handle operations on a specific upload
161 void specific_upload(struct http_transaction *h, struct ctdlsession *c, char *name) {
163 struct uploaded_file *u;
164 struct uploaded_file this_one;
166 if (upload_list == NULL) {
171 memset(&this_one, 0, sizeof(struct uploaded_file));
172 pthread_mutex_lock(&upload_list_mutex);
173 for (i=0; i<array_len(upload_list); ++i) {
174 u = (struct uploaded_file *) array_get_element_at(upload_list, i), sizeof(struct uploaded_file);
175 if (!strcmp(u->id, name)) {
176 memcpy(&this_one, u, sizeof(struct uploaded_file));
177 i = array_len(upload_list) + 1; // Go out of scope; we're done here
180 pthread_mutex_unlock(&upload_list_mutex);
182 // If we found a matching ID, now dispatch based on the HTTP method.
184 if (IsEmptyStr(this_one.id)) { // didn't find a match
187 else if (!strcasecmp(h->method, "GET")) { // fetch the item
190 else if (!strcasecmp(h->method, "DELETE")) { // delete the item
191 dav_delete_upload(h, c, this_one);
193 else { // unsupported method
199 // Dispatcher for paths starting with /ctdl/p/
200 void ctdl_p(struct http_transaction *h, struct ctdlsession *c) {
203 if (num_tokens(h->url, '/') == 3) { // /ctdl/p
208 extract_token(buf, h->url, 3, '/', sizeof buf);
209 if (num_tokens(h->url, '/') == 4) {
210 if (IsEmptyStr(buf)) {
211 ctdl_p_base(h, c); // /ctdl/p/
214 specific_upload(h, c, &h->url[8]);
219 // If we get to this point, the client requested an action we don't know how to perform.