Improved IPFS support (based on ipfs/kubo#1678 (comment))

Author: ZachSmithus

CHANGELOG.md

@@ -3,7 +3,7 @@
 ## master
 
 * Added playback from stdin: `cat demo.json | asciinema play -`
-* Added playback from IPFS: `asciinema play ipfs://ipfs/QmcdXYJp6e4zNuimuGeWPwNMHQdxuqWmKx7NhZofQ1nw2V`
+* Added playback from IPFS: `asciinema play ipfs:/ipfs/QmcdXYJp6e4zNuimuGeWPwNMHQdxuqWmKx7NhZofQ1nw2V`
 * Added playback from asciicast page URL: `asciinema play https://asciinema.org/a/22124`
 * `-q/--quiet` option added to `rec` command
 * Fixed handling of partial UTF-8 sequences in recorded stdout

README.md

@@ -114,6 +114,11 @@ Playing from stdin:
     cat /path/to/asciicast.json | asciinema play -
     curl -sL https://asciinema.org/a/21310.json | asciinema play -
 
+Playing from IPFS:
+
+    asciinema play ipfs:/ipfs/QmcdXYJp6e4zNuimuGeWPwNMHQdxuqWmKx7NhZofQ1nw2V
+    asciinema play fs:/ipfs/QmcdXYJp6e4zNuimuGeWPwNMHQdxuqWmKx7NhZofQ1nw2V
+
 Available options:
 
 * `-w, --max-wait=<sec>` - Reduce replayed terminal inactivity to max <sec> seconds

asciicast/asciicast.go

@@ -101,8 +101,10 @@ func getSource(url string) (io.ReadCloser, error) {
 	var isHTML bool
 	var err error
 
-	if strings.HasPrefix(url, "ipfs://") {
-		url = fmt.Sprintf("https://ipfs.io/%v", url[7:len(url)])
+	if strings.HasPrefix(url, "ipfs:/") {
+		url = fmt.Sprintf("https://ipfs.io/%v", url[6:])
+	} else if strings.HasPrefix(url, "fs:/") {
+		url = fmt.Sprintf("https://ipfs.io/%v", url[4:])
 	}
 
 	if url == "-" {