1 files changed, 72 insertions, 0 deletions
diff --git a/third_party/rust/webrtc-sdp/examples/file_parser.rs b/third_party/rust/webrtc-sdp/examples/file_parser.rs
new file mode 100644
index 0000000000..5997e8a770
--- /dev/null
+++ b/third_party/rust/webrtc-sdp/examples/file_parser.rs
@@ -0,0 +1,72 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use std::fs::File;
+use std::io::prelude::*;
+use std::panic;
+use std::path::Path;
+extern crate webrtc_sdp;
+
+// Takes the filename of a file that contains SDP, and optionally the trailing
+// flag --expect-failure.
+// If --expect-failure is passed, then the program will exit with a successful
+// exit code if the file fails to parse.
+fn main() {
+    let mut args = std::env::args();
+    let filename = match args.nth(1) {
+        None => {
+            eprintln!("Missing file name argument!");
+            std::process::exit(1);
+        }
+        Some(x) => x,
+    };
+
+    let path = Path::new(filename.as_str());
+    let display = path.display();
+
+    let mut file = match File::open(path) {
+        Err(why) => panic!("Failed to open {}: {}", display, why),
+        Ok(file) => file,
+    };
+
+    let mut s = String::new();
+    match file.read_to_string(&mut s) {
+        Err(why) => panic!("Couldn't read {}: {}", display, why),
+        Ok(s) => s,
+    };
+
+    // Hook up the panic handler if it is expected to fail to parse
+    let expect_failure = if let Some(x) = args.next() {
+        if x.to_lowercase() != "--expect-failure" {
+            eprintln!("Extra arguments passed!");
+            std::process::exit(1);
+        }
+        panic::set_hook(Box::new(|_| {
+            println!("Exited with failure, as expected.");
+            std::process::exit(0);
+        }));
+        true
+    } else {
+        false
+    };
+
+    // Remove comment lines
+    let s = s
+        .lines()
+        .filter(|&l| !l.trim_start().starts_with(';'))
+        .collect::<Vec<&str>>()
+        .join("\r\n");
+
+    let res = webrtc_sdp::parse_sdp(&s, true);
+    match res {
+        Err(why) => panic!("Failed to parse SDP with error: {}", why),
+        Ok(sdp) => println!("Parsed SDP structure:\n{sdp:#?}"),
+    }
+
+    if expect_failure {
+        eprintln!("Successfully parsed SDP that was expected to fail. You may need to update the example expectations.");
+        std::process::exit(1);
+    }
+    println!("Successfully parsed SDP");
+}