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html.c: Escape XML characters & View unknown type attachment link

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Signed-off-by: Yonle <yonle@lecturify.net>
This commit is contained in:
Yonle 2023-07-11 22:03:51 +07:00
parent eb7bee953b
commit 63741cb66a
2 changed files with 71 additions and 41 deletions
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97
html.c
View file

@ -105,7 +105,7 @@ xs_str *html_actor_icon(xs_str *os, char *actor,
{ {
xs *s1 = xs_fmt("<a href=\"%s\" class=\"p-author h-card snac-author\">%s</a>", xs *s1 = xs_fmt("<a href=\"%s\" class=\"p-author h-card snac-author\">%s</a>",
xs_dict_get(actor, "id"), name); xs_dict_get(actor, "id"), xs_encode_html(name));
s = xs_str_cat(s, s1); s = xs_str_cat(s, s1);
} }
@ -139,7 +139,7 @@ xs_str *html_actor_icon(xs_str *os, char *actor,
xs *s1 = xs_fmt( xs *s1 = xs_fmt(
"\n<time class=\"dt-published snac-pubdate\" title=\"%s\">%s</time>\n", "\n<time class=\"dt-published snac-pubdate\" title=\"%s\">%s</time>\n",
date_title, date_label); xs_encode_html(date_title), xs_encode_html(date_label));
s = xs_str_cat(s, s1); s = xs_str_cat(s, s1);
} }
@ -164,7 +164,7 @@ xs_str *html_actor_icon(xs_str *os, char *actor,
s1 = xs_fmt( s1 = xs_fmt(
"<br><a href=\"%s\" class=\"p-author-tag h-card snac-author-tag\">%s</a>", "<br><a href=\"%s\" class=\"p-author-tag h-card snac-author-tag\">%s</a>",
xs_dict_get(actor, "id"), user); xs_dict_get(actor, "id"), xs_encode_html(user));
s = xs_str_cat(s, s1); s = xs_str_cat(s, s1);
} }
@ -245,9 +245,9 @@ d_char *html_user_header(snac *snac, d_char *s, int local)
{ {
xs *s1 = xs_fmt("<title>%s (@%s@%s)</title>\n", xs *s1 = xs_fmt("<title>%s (@%s@%s)</title>\n",
xs_dict_get(snac->config, "name"), xs_encode_html(xs_dict_get(snac->config, "name")),
snac->uid, xs_encode_html(snac->uid),
xs_dict_get(srv_config, "host")); xs_encode_html(xs_dict_get(srv_config, "host")));
s = xs_str_cat(s, s1); s = xs_str_cat(s, s1);
} }
@ -284,18 +284,18 @@ d_char *html_user_header(snac *snac, d_char *s, int local)
"<meta property=\"og:image\" content=\"%s\"/>\n" "<meta property=\"og:image\" content=\"%s\"/>\n"
"<meta property=\"og:image:width\" content=\"300\"/>\n" "<meta property=\"og:image:width\" content=\"300\"/>\n"
"<meta property=\"og:image:height\" content=\"300\"/>\n", "<meta property=\"og:image:height\" content=\"300\"/>\n",
xs_dict_get(srv_config, "host"), xs_encode_html(xs_dict_get(srv_config, "host")),
xs_dict_get(snac->config, "name"), xs_encode_html(xs_dict_get(snac->config, "name")),
snac->uid, xs_encode_html(snac->uid),
xs_dict_get(srv_config, "host"), xs_encode_html(xs_dict_get(srv_config, "host")),
s_bio, xs_encode_html(s_bio),
s_avatar); xs_encode_html(s_avatar));
s = xs_str_cat(s, s1); s = xs_str_cat(s, s1);
} }
{ {
xs *s1 = xs_fmt("<link rel=\"alternate\" type=\"application/rss+xml\" " xs *s1 = xs_fmt("<link rel=\"alternate\" type=\"application/rss+xml\" "
"title=\"RSS\" href=\"%s.rss\" />\n", snac->actor); "title=\"RSS\" href=\"%s.rss\" />\n", snac->actor); /* snac->actor is likely need to be URLEncoded. */
s = xs_str_cat(s, s1); s = xs_str_cat(s, s1);
} }
@ -355,16 +355,16 @@ d_char *html_user_header(snac *snac, d_char *s, int local)
"<p class=\"snac-top-user-id\">@%s@%s</p>\n"; "<p class=\"snac-top-user-id\">@%s@%s</p>\n";
xs *s1 = xs_fmt(_tmpl, xs *s1 = xs_fmt(_tmpl,
xs_dict_get(snac->config, "name"), xs_encode_html(xs_dict_get(snac->config, "name")),
xs_dict_get(snac->config, "uid"), xs_dict_get(srv_config, "host") xs_encode_html(xs_dict_get(snac->config, "uid")), xs_encode_html(xs_dict_get(srv_config, "host"))
); );
s = xs_str_cat(s, s1); s = xs_str_cat(s, s1);
if (local) { if (local) {
xs *bio1 = not_really_markdown(xs_dict_get(snac->config, "bio"), NULL); xs *bio1 = not_really_markdown(xs_encode_html(xs_dict_get(snac->config, "bio")), NULL);
xs *tags = xs_list_new(); xs *tags = xs_list_new();
xs *bio2 = process_tags(snac, bio1, &tags); xs *bio2 = xs_encode_html(process_tags(snac, bio1, &tags));
xs *s1 = xs_fmt("<div class=\"p-note snac-top-user-bio\">%s</div>\n", bio2); xs *s1 = xs_fmt("<div class=\"p-note snac-top-user-bio\">%s</div>\n", bio2);
s = xs_str_cat(s, s1); s = xs_str_cat(s, s1);
@ -914,7 +914,7 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
xs *s1 = xs_fmt( xs *s1 = xs_fmt(
"<div class=\"snac-origin\">" "<div class=\"snac-origin\">"
"<a href=\"%s\">%s</a> %s</a></div>", "<a href=\"%s\">%s</a> %s</a></div>",
snac->actor, xs_dict_get(snac->config, "name"), L("boosted") snac->actor, xs_encode_html(xs_dict_get(snac->config, "name")), L("boosted")
); );
s = xs_str_cat(s, s1); s = xs_str_cat(s, s1);
@ -928,7 +928,7 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
"<div class=\"snac-origin\">" "<div class=\"snac-origin\">"
"<a href=\"%s\">%s</a> %s</div>\n", "<a href=\"%s\">%s</a> %s</div>\n",
xs_dict_get(actor_r, "id"), xs_dict_get(actor_r, "id"),
name, xs_encode_html(name),
L("boosted") L("boosted")
); );
@ -967,7 +967,7 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
char *cw = xs_dict_get(snac->config, "cw"); char *cw = xs_dict_get(snac->config, "cw");
if (xs_is_null(cw) || local) if (xs_is_null(cw) || local)
cw = ""; cw = "";
xs *s1 = xs_fmt("<details %s><summary>%s [%s]</summary>\n", cw, v, L("SENSITIVE CONTENT")); xs *s1 = xs_fmt("<details %s><summary>%s [%s]</summary>\n", cw, xs_encode_html(v), L("SENSITIVE CONTENT"));
s = xs_str_cat(s, s1); s = xs_str_cat(s, s1);
sensitive = 1; sensitive = 1;
} }
@ -1049,7 +1049,7 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
if (name && replies) { if (name && replies) {
int nr = xs_number_get(xs_dict_get(replies, "totalItems")); int nr = xs_number_get(xs_dict_get(replies, "totalItems"));
xs *l = xs_fmt("<tr><td>%s:</td><td>%d</td></tr>\n", name, nr); xs *l = xs_fmt("<tr><td>%s:</td><td>%d</td></tr>\n", xs_encode_html(name), nr);
c = xs_str_cat(c, l); c = xs_str_cat(c, l);
} }
@ -1073,7 +1073,7 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
xs *opt = xs_fmt("<input type=\"%s\"" xs *opt = xs_fmt("<input type=\"%s\""
" id=\"%s\" value=\"%s\" name=\"question\"> %s<br>\n", " id=\"%s\" value=\"%s\" name=\"question\"> %s<br>\n",
!xs_is_null(oo) ? "radio" : "checkbox", !xs_is_null(oo) ? "radio" : "checkbox",
name, name, name); xs_encode_html(name), xs_encode_html(name), xs_encode_html(name));
s1 = xs_str_cat(s1, opt); s1 = xs_str_cat(s1, opt);
} }
@ -1107,7 +1107,7 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
/* skip leading zeros */ /* skip leading zeros */
for (; *p == '0' || *p == ':'; p++); for (; *p == '0' || *p == ':'; p++);
xs *s1 = xs_fmt("<p>%s %s</p>", L("Closes in"), p); xs *s1 = xs_fmt("<p>%s %s</p>", L("Closes in"), xs_encode_html(p));
c = xs_str_cat(c, s1); c = xs_str_cat(c, s1);
} }
} }
@ -1136,7 +1136,7 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
if (xs_startswith(t, "image/")) { if (xs_startswith(t, "image/")) {
char *url = xs_dict_get(v, "url"); char *url = xs_dict_get(v, "url");
char *name = xs_dict_get(v, "name"); char *name = xs_encode_html(xs_dict_get(v, "name"));
if (url != NULL) { if (url != NULL) {
if (xs_is_null(name)) if (xs_is_null(name))
@ -1151,9 +1151,31 @@ xs_str *html_entry(snac *snac, xs_str *os, const xs_dict *msg, int local,
else else
if (xs_startswith(t, "video/")) { if (xs_startswith(t, "video/")) {
char *url = xs_dict_get(v, "url"); char *url = xs_dict_get(v, "url");
char *name = xs_encode_html(xs_dict_get(v, "name"));
if (url != NULL) { if (url != NULL) {
xs *s1 = xs_fmt("<object data=\"%s\"></object>\n", url); xs *s1 = xs_fmt("<video style=\"max-width: 90vw; max-height: 70vh;\" controls src=\"%s\">Video: <a href=\"%s\">%s</a></video>\n", url, url, name ? name : "No description.");
s = xs_str_cat(s, s1);
}
}
else
if (xs_startswith(t, "audio/")) {
char *url = xs_dict_get(v, "url");
char *name = xs_encode_html(xs_dict_get(v, "name"));
if (url != NULL) {
xs *s1 = xs_fmt("<audio style=\"max-width: 90vw\" controls src=\"%s\">Audio: <a href=\"%s\">%s</a></audio>\n", url, url, name ? name : "No description.");
s = xs_str_cat(s, s1);
}
}
else {
char *url = xs_dict_get(v, "url");
char *name = xs_encode_html(xs_dict_get(v, "name"));
if (url != NULL) {
xs *s1 = xs_fmt("<a href=\"%s\">Attachment: %s</a>", url, name ? name : "No description");
s = xs_str_cat(s, s1); s = xs_str_cat(s, s1);
} }
@ -1327,7 +1349,7 @@ xs_str *html_timeline(snac *snac, const xs_list *list, int local, int skip, int
d_char *html_people_list(snac *snac, d_char *os, d_char *list, const char *header, const char *t) d_char *html_people_list(snac *snac, d_char *os, d_char *list, const char *header, const char *t)
{ {
xs *s = xs_str_new(NULL); xs *s = xs_str_new(NULL);
xs *h = xs_fmt("<h2 class=\"snac-header\">%s</h2>\n", header); xs *h = xs_fmt("<h2 class=\"snac-header\">%s</h2>\n", xs_encode_html(header));
char *p, *actor_id; char *p, *actor_id;
s = xs_str_cat(s, h); s = xs_str_cat(s, h);
@ -1357,7 +1379,7 @@ d_char *html_people_list(snac *snac, d_char *os, d_char *list, const char *heade
if (xs_startswith(sc, "<p>")) if (xs_startswith(sc, "<p>"))
s = xs_str_cat(s, sc); s = xs_str_cat(s, sc);
else { else {
xs *s1 = xs_fmt("<p>%s</p>", sc); xs *s1 = xs_fmt("<p>%s</p>", xs_encode_html(sc));
s = xs_str_cat(s, s1); s = xs_str_cat(s, s1);
} }
@ -1529,7 +1551,7 @@ xs_str *html_notifications(snac *snac)
xs *s1 = xs_fmt("<div class=\"snac-post-with-desc\">\n" xs *s1 = xs_fmt("<div class=\"snac-post-with-desc\">\n"
"<p><b>%s by <a href=\"%s\">%s</a></b>:</p>\n", "<p><b>%s by <a href=\"%s\">%s</a></b>:</p>\n",
label, actor_id, a_name); xs_encode_html(label), actor_id, xs_encode_html(a_name));
s = xs_str_cat(s, s1); s = xs_str_cat(s, s1);
if (strcmp(type, "Follow") == 0 || strcmp(utype, "Follow") == 0) { if (strcmp(type, "Follow") == 0 || strcmp(utype, "Follow") == 0) {
@ -1754,9 +1776,6 @@ int html_get_handler(const xs_dict *req, const char *q_path,
xs *bio = not_really_markdown(xs_dict_get(snac.config, "bio"), NULL); xs *bio = not_really_markdown(xs_dict_get(snac.config, "bio"), NULL);
char *p, *v; char *p, *v;
/* escape tags */
bio = xs_replace_i(bio, "<", "&lt;");
bio = xs_replace_i(bio, ">", "&gt;");
rss = xs_fmt( rss = xs_fmt(
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
@ -1766,11 +1785,11 @@ int html_get_handler(const xs_dict *req, const char *q_path,
"<language>en</language>\n" "<language>en</language>\n"
"<link>%s.rss</link>\n" "<link>%s.rss</link>\n"
"<description>%s</description>\n", "<description>%s</description>\n",
xs_dict_get(snac.config, "name"), xs_encode_html(xs_dict_get(snac.config, "name")),
snac.uid, xs_encode_html(snac.uid),
xs_dict_get(srv_config, "host"), xs_encode_html(xs_dict_get(srv_config, "host")),
snac.actor, snac.actor,
bio xs_encode_html(bio)
); );
p = elems; p = elems;
@ -1785,14 +1804,10 @@ int html_get_handler(const xs_dict *req, const char *q_path,
if (!xs_startswith(id, snac.actor)) if (!xs_startswith(id, snac.actor))
continue; continue;
xs *content = sanitize(xs_dict_get(msg, "content")); xs *content = xs_encode_html(sanitize(xs_dict_get(msg, "content")));
xs *title = xs_str_new(NULL); xs *title = xs_str_new(NULL);
int i; int i;
/* escape tags */
content = xs_replace_i(content, "<", "&lt;");
content = xs_replace_i(content, ">", "&gt;");
for (i = 0; content[i] && content[i] != '<' && content[i] != '&' && i < 40; i++) for (i = 0; content[i] && content[i] != '<' && content[i] != '&' && i < 40; i++)
title = xs_append_m(title, &content[i], 1); title = xs_append_m(title, &content[i], 1);
@ -1802,7 +1817,7 @@ int html_get_handler(const xs_dict *req, const char *q_path,
"<link>%s</link>\n" "<link>%s</link>\n"
"<description>%s</description>\n" "<description>%s</description>\n"
"</item>\n", "</item>\n",
title, id, content xs_encode_html(title), id, xs_encode_html(content)
); );
rss = xs_str_cat(rss, s); rss = xs_str_cat(rss, s);

15
xs.h
View file

@ -72,6 +72,7 @@ xs_str *xs_replace_in(xs_str *str, const char *sfrom, const char *sto, int times
xs_str *xs_fmt(const char *fmt, ...); xs_str *xs_fmt(const char *fmt, ...);
int xs_str_in(const char *haystack, const char *needle); int xs_str_in(const char *haystack, const char *needle);
int _xs_startsorends(const char *str, const char *xfix, int ends); int _xs_startsorends(const char *str, const char *xfix, int ends);
xs_str *xs_encode_html(const xs_str *str);
#define xs_startswith(str, prefix) _xs_startsorends(str, prefix, 0) #define xs_startswith(str, prefix) _xs_startsorends(str, prefix, 0)
#define xs_endswith(str, postfix) _xs_startsorends(str, postfix, 1) #define xs_endswith(str, postfix) _xs_startsorends(str, postfix, 1)
xs_str *xs_crop_i(xs_str *str, int start, int end); xs_str *xs_crop_i(xs_str *str, int start, int end);
@ -506,6 +507,20 @@ int _xs_startsorends(const char *str, const char *xfix, int ends)
return !!(ssz >= psz && memcmp(xfix, str + (ends ? ssz - psz : 0), psz) == 0); return !!(ssz >= psz && memcmp(xfix, str + (ends ? ssz - psz : 0), psz) == 0);
} }
xs_str *xs_encode_html(const char *str)
/* escapes html characters */
{
xs_str *encoded = xs_replace(str, "&", "&amp;");
encoded = xs_replace(encoded, "<", "&lt;");
encoded = xs_replace(encoded, ">", "&gt;");
encoded = xs_replace(encoded, "\"", "&#34;");
encoded = xs_replace(encoded, "'", "&#39;");
// Restore only <br>. Probably safe. Let's hope nothing goes wrong with this.
encoded = xs_replace(encoded, "&lt;br&gt;", "<br>");
return encoded;
}
xs_str *xs_crop_i(xs_str *str, int start, int end) xs_str *xs_crop_i(xs_str *str, int start, int end)
/* crops the d_char to be only from start to end */ /* crops the d_char to be only from start to end */