--- /dev/null
+// The code in here feeds messages out as JSON to the client browser. It is currently being used
+// for the forum view, but as we implement other views we'll probably reuse a lot of what's here.
+//
+// Copyright (c) 1996-2022 by the citadel.org team
+//
+// This program is open source software. Use, duplication, or
+// disclosure are subject to the GNU General Public License v3.
+
+#include "webcit.h"
+
+// Commands we need to send to Citadel Server before we begin rendering forum view.
+// These are common to flat and threaded views.
+void setup_for_forum_view(struct ctdlsession *c) {
+ char buf[1024];
+ ctdl_printf(c, "MSGP text/html|text/plain"); // Declare the MIME types we know how to render
+ ctdl_readline(c, buf, sizeof(buf)); // Ignore the response
+ ctdl_printf(c, "MSGP dont_decode"); // Tell the server we will decode base64/etc client-side
+ ctdl_readline(c, buf, sizeof(buf)); // Ignore the response
+}
+
+
+// Fetch a single message and return it in JSON format for client-side rendering
+void json_render_one_message(struct http_transaction *h, struct ctdlsession *c, long msgnum) {
+ StrBuf *raw_msg = NULL;
+ StrBuf *sanitized_msg = NULL;
+ char buf[1024];
+ char content_transfer_encoding[1024] = { 0 };
+ char content_type[1024] = { 0 };
+ char datetime[128] = { 0 };
+ char author[1024] = { 0 };
+ char emailaddr[1024] = { 0 };
+ int message_originated_locally = 0;
+
+ setup_for_forum_view(c);
+
+ ctdl_printf(c, "MSG4 %ld", msgnum);
+ ctdl_readline(c, buf, sizeof(buf));
+ if (buf[0] != '1') {
+ do_404(h);
+ return;
+ }
+
+ JsonValue *j = NewJsonObject(HKEY("message"));
+ JsonObjectAppend(j, NewJsonNumber(HKEY("msgnum"), msgnum));
+
+ while ((ctdl_readline(c, buf, sizeof(buf)) >= 0) && (strcmp(buf, "text")) && (strcmp(buf, "000"))) {
+ utf8ify_rfc822_string(&buf[5]);
+
+ // citadel header parsing here
+ if (!strncasecmp(buf, "from=", 5)) {
+ safestrncpy(author, &buf[5], sizeof author);
+ }
+ else if (!strncasecmp(buf, "rfca=", 5)) {
+ safestrncpy(emailaddr, &buf[5], sizeof emailaddr);
+ }
+ else if (!strncasecmp(buf, "time=", 5)) {
+ JsonObjectAppend(j, NewJsonNumber(HKEY("time"), atol(&buf[5])));
+ }
+ else if (!strncasecmp(buf, "locl=", 5)) {
+ message_originated_locally = 1;
+ }
+ else if (!strncasecmp(buf, "subj=", 5)) {
+ JsonObjectAppend(j, NewJsonPlainString(HKEY("subj"), &buf[5], -1));
+ }
+ else if (!strncasecmp(buf, "msgn=", 5)) {
+ JsonObjectAppend(j, NewJsonPlainString(HKEY("msgn"), &buf[5], -1));
+ }
+ else if (!strncasecmp(buf, "wefw=", 5)) {
+ JsonObjectAppend(j, NewJsonPlainString(HKEY("wefw"), &buf[5], -1));
+ }
+ }
+
+ if (message_originated_locally) {
+ JsonObjectAppend(j, NewJsonPlainString(HKEY("from"), author, -1));
+ }
+ else {
+ JsonObjectAppend(j, NewJsonPlainString(HKEY("from"), emailaddr, -1)); // FIXME do compound address string
+ }
+
+ if (!strcmp(buf, "text")) {
+ while ((ctdl_readline(c, buf, sizeof(buf)) >= 0) && (strcmp(buf, "")) && (strcmp(buf, "000"))) {
+ // rfc822 header parsing here
+ if (!strncasecmp(buf, "Content-transfer-encoding:", 26)) {
+ strcpy(content_transfer_encoding, &buf[26]);
+ striplt(content_transfer_encoding);
+ }
+ if (!strncasecmp(buf, "Content-type:", 13)) {
+ strcpy(content_type, &buf[13]);
+ striplt(content_type);
+ }
+ }
+ if (!strcmp(buf, "000")) { // if we have an empty message, don't try to read further
+ raw_msg = NULL;
+ }
+ else {
+ raw_msg = ctdl_readtextmsg(c);
+ }
+ }
+ else {
+ raw_msg = NULL;
+ }
+
+ if (raw_msg) {
+ // These are the encodings we know how to handle. Decode in-place.
+
+ if (!strcasecmp(content_transfer_encoding, "base64")) {
+ StrBufDecodeBase64(raw_msg);
+ }
+ if (!strcasecmp(content_transfer_encoding, "quoted-printable")) {
+ StrBufDecodeQP(raw_msg);
+ }
+
+ // At this point, raw_msg contains the decoded message.
+ // Now run through the renderers we have available.
+
+ if (!strncasecmp(content_type, "text/html", 9)) {
+ sanitized_msg = html2html("UTF-8", 0, c->room, msgnum, raw_msg);
+ }
+ else if (!strncasecmp(content_type, "text/plain", 10)) {
+ sanitized_msg = text2html("UTF-8", 0, c->room, msgnum, raw_msg);
+ }
+ else if (!strncasecmp(content_type, "text/x-citadel-variformat", 25)) {
+ sanitized_msg = variformat2html(raw_msg);
+ }
+ else {
+ sanitized_msg = NewStrBufPlain(HKEY("<i>No renderer for this content type</i><br>"));
+ syslog(LOG_WARNING, "forum_view: no renderer for content type %s", content_type);
+ }
+ FreeStrBuf(&raw_msg);
+
+ // If sanitized_msg is not NULL, we have rendered the message and can output it.
+ if (sanitized_msg) {
+ JsonObjectAppend(j, NewJsonString(HKEY("text"), sanitized_msg, NEWJSONSTRING_SMASHBUF));
+ }
+ else {
+ syslog(LOG_WARNING, "forum_view: message %ld of content type %s converted to NULL", msgnum, content_type);
+ }
+ }
+
+ StrBuf *sj = NewStrBuf();
+ SerializeJson(sj, j, 1); // '1' == free the source object
+
+ add_response_header(h, strdup("Content-type"), strdup("application/json"));
+ h->response_code = 200;
+ h->response_string = strdup("OK");
+ h->response_body_length = StrLength(sj);
+ h->response_body = SmashStrBuf(&sj);
+}
projects / citadel.git / blobdiff