2 // Forum view (threaded/flat)
4 // Copyright (c) 1996-2021 by the citadel.org team
6 // This program is open source software. It runs great on the
7 // Linux operating system (and probably elsewhere). You can use,
8 // copy, and run it under the terms of the GNU General Public
11 // This program is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
28 // Commands we need to send to Citadel Server before we begin rendering forum view.
29 // These are common to flat and threaded views.
30 void setup_for_forum_view(struct ctdlsession *c) {
32 ctdl_printf(c, "MSGP text/html|text/plain"); // Declare the MIME types we know how to render
33 ctdl_readline(c, buf, sizeof(buf)); // Ignore the response
34 ctdl_printf(c, "MSGP dont_decode"); // Tell the server we will decode base64/etc client-side
35 ctdl_readline(c, buf, sizeof(buf)); // Ignore the response
39 // Fetch a single message and return it in JSON format for client-side rendering
40 void json_render_one_message(struct http_transaction *h, struct ctdlsession *c, long msgnum) {
41 StrBuf *raw_msg = NULL;
42 StrBuf *sanitized_msg = NULL;
44 char content_transfer_encoding[1024] = { 0 };
45 char content_type[1024] = { 0 };
46 char datetime[128] = { 0 };
47 char author[1024] = { 0 };
48 char emailaddr[1024] = { 0 };
49 int message_originated_locally = 0;
51 setup_for_forum_view(c);
53 ctdl_printf(c, "MSG4 %ld", msgnum);
54 ctdl_readline(c, buf, sizeof(buf));
60 JsonValue *j = NewJsonObject(HKEY("message"));
62 while ((ctdl_readline(c, buf, sizeof(buf)) >= 0) && (strcmp(buf, "text")) && (strcmp(buf, "000"))) {
64 // citadel header parsing here
65 if (!strncasecmp(buf, "from=", 5)) {
66 safestrncpy(author, &buf[5], sizeof author);
68 else if (!strncasecmp(buf, "rfca=", 5)) {
69 safestrncpy(emailaddr, &buf[5], sizeof emailaddr);
71 else if (!strncasecmp(buf, "time=", 5)) {
75 localtime_r(&tt, &tm);
76 strftime(datetime, sizeof datetime, "%c", &tm);
77 JsonObjectAppend(j, NewJsonPlainString(HKEY("time"), datetime, -1));
79 else if (!strncasecmp(buf, "locl=", 5)) {
80 message_originated_locally = 1;
82 else if (!strncasecmp(buf, "subj=", 5)) {
83 JsonObjectAppend(j, NewJsonPlainString(HKEY("subj"), &buf[5], -1));
87 if (message_originated_locally) {
88 JsonObjectAppend(j, NewJsonPlainString(HKEY("from"), author, -1));
91 JsonObjectAppend(j, NewJsonPlainString(HKEY("from"), emailaddr, -1)); // FIXME do the compound address string
94 if (!strcmp(buf, "text")) {
95 while ((ctdl_readline(c, buf, sizeof(buf)) >= 0) && (strcmp(buf, "")) && (strcmp(buf, "000"))) {
96 // rfc822 header parsing here
97 if (!strncasecmp(buf, "Content-transfer-encoding:", 26)) {
98 strcpy(content_transfer_encoding, &buf[26]);
99 striplt(content_transfer_encoding);
101 if (!strncasecmp(buf, "Content-type:", 13)) {
102 strcpy(content_type, &buf[13]);
103 striplt(content_type);
106 raw_msg = ctdl_readtextmsg(c);
113 // These are the encodings we know how to handle. Decode in-place.
115 if (!strcasecmp(content_transfer_encoding, "base64")) {
116 StrBufDecodeBase64(raw_msg);
118 if (!strcasecmp(content_transfer_encoding, "quoted-printable")) {
119 StrBufDecodeQP(raw_msg);
122 // At this point, raw_msg contains the decoded message.
123 // Now run through the renderers we have available.
125 if (!strncasecmp(content_type, "text/html", 9)) {
126 sanitized_msg = html2html("UTF-8", 0, c->room, msgnum, raw_msg);
128 else if (!strncasecmp(content_type, "text/plain", 10)) {
129 sanitized_msg = text2html("UTF-8", 0, c->room, msgnum, raw_msg);
131 else if (!strncasecmp(content_type, "text/x-citadel-variformat", 25)) {
132 sanitized_msg = variformat2html(raw_msg);
135 sanitized_msg = NewStrBufPlain(HKEY("<i>No renderer for this content type</i><br>"));
136 syslog(LOG_WARNING, "forum_view: no renderer for content type %s", content_type);
138 FreeStrBuf(&raw_msg);
140 // If sanitized_msg is not NULL, we have rendered the message and can output it.
142 JsonObjectAppend(j, NewJsonString(HKEY("text"), sanitized_msg, NEWJSONSTRING_SMASHBUF));
145 syslog(LOG_WARNING, "forum_view: message %ld of content type %s converted to NULL", msgnum, content_type);
149 StrBuf *sj = NewStrBuf();
150 SerializeJson(sj, j, 1); // '1' == free the source object
152 add_response_header(h, strdup("Content-type"), strdup("application/json"));
153 h->response_code = 200;
154 h->response_string = strdup("OK");
155 h->response_body_length = StrLength(sj);
156 h->response_body = SmashStrBuf(&sj);