GopherProxy

	add gopher mode and twtxt output format - frontends - front-ends for some sites…
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	---
	commit ee630780f97caacdc83bbbf29c60be757394f017
	parent 5e29f7c0a3a955816bdc5e3b418726ec68d5e0b4
	Author: Hiltjo Posthuma <[email protected]>
	Date: Sun, 14 May 2023 00:06:50 +0200

	add gopher mode and twtxt output format

	Diffstat:
	M youtube/feed.c \| 73 ++++++++++++++++++++++++++---…

	1 file changed, 62 insertions(+), 11 deletions(-)
	---
	diff --git a/youtube/feed.c b/youtube/feed.c
	@@ -90,6 +90,7 @@ static void json_header(void);
	static void json_item(void);
	static void json_footer(void);
	static void sfeed_item(void); /* TSV / sfeed */
	+static void twtxt_item(void);

	static void string_append(String , const char , size_t);
	static void string_buffer_realloc(String *, size_t);
	@@ -151,7 +152,8 @@ static String attrrel, tmpstr;

	static struct search_response *search_res = NULL;
	static void (*printfields)(void) = sfeed_item;
	-static int cgimode = 0;
	+static int cgimode = 0, godmode = 0;
	+static const char server_name = "127.0.0.1", server_port = "70";

	static int
	tagcmp(const void v1, const void v2)
	@@ -631,6 +633,39 @@ sfeed_item(void)
	putchar('\n');
	}

	+static void
	+twtxt_item(void)
	+{
	+ struct item v, found = NULL;
	+ size_t i;
	+
	+ /* must have a video id */
	+ if (!ctx.fields[FeedFieldYoutubeId].str.len)
	+ return;
	+
	+ for (i = 0; i < search_res->nitems; i++) {
	+ v = &(search_res->items[i]);
	+ if (!strcmp(ctx.fields[FeedFieldYoutubeId].str.data, v->id))
	+ found = v;
	+ }
	+ /* Only print the video if it was found in the feed aswell.
	+ This way it filters away shorts too. */
	+ if (!found)
	+ return;
	+
	+ string_print(&ctx.fields[FeedFieldTime].str);
	+ putchar(FieldSeparator);
	+ string_print(&ctx.fields[FeedFieldTitle].str);
	+ if (found->duration[0]) {
	+ fputs(" [", stdout);
	+ fputs(found->duration, stdout);
	+ fputs("]", stdout);
	+ }
	+ fputs(": ", stdout);
	+ string_print(&ctx.fields[FeedFieldLink].str);
	+ putchar('\n');
	+}
	+
	static int
	istag(const char name, size_t len, const char name2, size_t len2)
	{
	@@ -888,9 +923,13 @@ void
	usage(void)
	{
	if (cgimode) {
	- fputs("Status: 400 Bad Request\r\n", stdout);
	- fputs("Content-Type: text/plain; charset=utf-8\r\n\r\n", stdou…
	- fputs("400 Bad Request\n", stdout);
	+ if (godmode) {
	+ printf("3Bad Request\tErr\t%s\t%s\r\n", server_name, s…
	+ } else {
	+ fputs("Status: 400 Bad Request\r\n", stdout);
	+ fputs("Content-Type: text/plain; charset=utf-8\r\n\r\n…
	+ fputs("400 Bad Request\n", stdout);
	+ }
	exit(0);
	} else {
	fputs("usage: feed <channelid> [atom\|json\|tsv]\n", stderr);
	@@ -903,19 +942,23 @@ main(int argc, char *argv[])
	{
	char buf[256];
	const char *channelid = NULL;
	- char data, format = "tsv", p, requesturi, *tmp;
	+ char data, format = "tsv", p, path = NULL, *tmp;
	size_t i;

	if (pledge("stdio dns inet rpath unveil", NULL) == -1)
	err(1, "pledge");

	- if ((tmp = getenv("REQUEST_URI"))) {
	- cgimode = 1;
	+ if ((tmp = getenv("REQUEST_URI")))
	+ path = tmp;
	+ else if ((tmp = getenv("REQUEST")))
	+ path = tmp;

	- strlcpy(buf, tmp, sizeof(buf));
	- requesturi = buf;
	+ if (path) {
	+ cgimode = 1;
	+ strlcpy(buf, path, sizeof(buf));
	+ path = buf;

	- if (!(p = strrchr(requesturi, '/')))
	+ if (!(p = strrchr(path, '/')))
	usage();

	channelid = p + 1;
	@@ -923,6 +966,12 @@ main(int argc, char *argv[])
	p = '\0'; / NULL terminate */
	format = p + 1;
	}
	+ if ((tmp = getenv("SERVER_NAME")))
	+ server_name = tmp;
	+ if ((tmp = getenv("SERVER_PORT")))
	+ server_port = tmp;
	+ if ((tmp = getenv("SERVER_PROTOCOL")) && strstr(tmp, "gopher"))
	+ godmode = 1;
	} else {
	if (argc <= 1)
	usage();
	@@ -940,6 +989,8 @@ main(int argc, char *argv[])
	printfields = json_item;
	else if (!strcmp(format, "tsv") \|\| !strcmp(format, "sfeed"))
	printfields = sfeed_item;
	+ else if (!strcmp(format, "txt") \|\| !strcmp(format, "twtxt"))
	+ printfields = twtxt_item;
	else
	usage();

	@@ -975,7 +1026,7 @@ main(int argc, char *argv[])
	string_clear(&(ctx.fields[i].str));
	}

	- if (cgimode) {
	+ if (cgimode && !godmode) {
	fputs("Status: 200 OK\r\n", stdout);
	if (!strcmp(format, "atom") \|\| !strcmp(format, "xml"))
	fputs("Content-Type: text/xml; charset=utf-8\r\n\r\n",…