[FFmpeg-devel] [PATCH v3 2/2] avformat/gopher: Add support for Gopher over TLS.

[parazyd]

This commit adds a "gophers" handler to the gopher protocol. gophers
is a community-adopted protocol that acts the same way like normal
gopher with the added TLS encapsulation.

The gophers protocol is supported by gopher servers like geomydae(8),
and clients like curl(1), clic(1), and hurl(1).

Signed-off-by: parazyd <parazyd at dyne.org>
---
 Changelog               |  1 +
 configure               |  1 +
 libavformat/Makefile    |  1 +
 libavformat/gopher.c    | 23 +++++++++++++++++++----
 libavformat/protocols.c |  1 +
 5 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/Changelog b/Changelog
index ba5aebf79d..5a7e007647 100644
--- a/Changelog
+++ b/Changelog
@@ -77,6 +77,7 @@ version <next>:
 - OpenEXR image encoder
 - Simbiosis IMX decoder
 - Simbiosis IMX demuxer
+- gophers protocol
 
 
 version 4.3:
diff --git a/configure b/configure
index 380fca5245..cbce2b0f69 100755
--- a/configure
+++ b/configure
@@ -3451,6 +3451,7 @@ ffrtmphttp_protocol_conflict="librtmp_protocol"
 ffrtmphttp_protocol_select="http_protocol"
 ftp_protocol_select="tcp_protocol"
 gopher_protocol_select="tcp_protocol"
+gophers_protocol_select="tls_protocol"
 http_protocol_select="tcp_protocol"
 http_protocol_suggest="zlib"
 httpproxy_protocol_select="tcp_protocol"
diff --git a/libavformat/Makefile b/libavformat/Makefile
index fcb39ce133..09038e40c3 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -619,6 +619,7 @@ OBJS-$(CONFIG_FFRTMPHTTP_PROTOCOL)       += rtmphttp.o
 OBJS-$(CONFIG_FILE_PROTOCOL)             += file.o
 OBJS-$(CONFIG_FTP_PROTOCOL)              += ftp.o urldecode.o
 OBJS-$(CONFIG_GOPHER_PROTOCOL)           += gopher.o
+OBJS-$(CONFIG_GOPHERS_PROTOCOL)          += gopher.o
 OBJS-$(CONFIG_HLS_PROTOCOL)              += hlsproto.o
 OBJS-$(CONFIG_HTTP_PROTOCOL)             += http.o httpauth.o urldecode.o
 OBJS-$(CONFIG_HTTPPROXY_PROTOCOL)        += http.o httpauth.o urldecode.o
diff --git a/libavformat/gopher.c b/libavformat/gopher.c
index 7c88ab01a8..c9326080db 100644
--- a/libavformat/gopher.c
+++ b/libavformat/gopher.c
@@ -75,19 +75,23 @@ static int gopher_close(URLContext *h)
 static int gopher_open(URLContext *h, const char *uri, int flags)
 {
     GopherContext *s = h->priv_data;
-    char hostname[1024], auth[1024], path[1024], buf[1024];
+    char proto[10], hostname[1024], auth[1024], path[1024], buf[1024];
     int port, err;
+    const char *lower_proto = "tcp";
 
     h->is_streamed = 1;
 
     /* needed in any case to build the host string */
-    av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
-                 path, sizeof(path), uri);
+    av_url_split(proto, sizeof(proto), auth, sizeof(auth),
+                 hostname, sizeof(hostname), &port, path, sizeof(path), uri);
 
     if (port < 0)
         port = 70;
 
-    ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL);
+    if (!strcmp(proto, "gophers"))
+        lower_proto = "tls";
+
+    ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
 
     s->hd = NULL;
     err = ffurl_open_whitelist(&s->hd, buf, AVIO_FLAG_READ_WRITE,
@@ -120,3 +124,14 @@ const URLProtocol ff_gopher_protocol = {
     .flags             = URL_PROTOCOL_FLAG_NETWORK,
     .default_whitelist = "gopher,tcp"
 };
+
+const URLProtocol ff_gophers_protocol = {
+    .name              = "gophers",
+    .url_open          = gopher_open,
+    .url_read          = gopher_read,
+    .url_write         = gopher_write,
+    .url_close         = gopher_close,
+    .priv_data_size    = sizeof(GopherContext),
+    .flags             = URL_PROTOCOL_FLAG_NETWORK,
+    .default_whitelist = "gopher,gophers,tcp,tls"
+};
diff --git a/libavformat/protocols.c b/libavformat/protocols.c
index 7df18fbb3b..9e77dc2506 100644
--- a/libavformat/protocols.c
+++ b/libavformat/protocols.c
@@ -34,6 +34,7 @@ extern const URLProtocol ff_ffrtmphttp_protocol;
 extern const URLProtocol ff_file_protocol;
 extern const URLProtocol ff_ftp_protocol;
 extern const URLProtocol ff_gopher_protocol;
+extern const URLProtocol ff_gophers_protocol;
 extern const URLProtocol ff_hls_protocol;
 extern const URLProtocol ff_http_protocol;
 extern const URLProtocol ff_httpproxy_protocol;
-- 
2.30.1