Don't let surf panic on invalid URIs (#1205)

lib/src/fnc/http.rs

@@ -34,11 +34,12 @@ pub async fn delete((_, _): (Value, Option<Value>)) -> Result<Value, Error> {
 
 fn try_as_uri(fn_name: &str, value: Value) -> Result<Strand, Error> {
 	match value {
-		Value::Strand(uri) => Ok(uri),
+		// Avoid surf crate panic by pre-checking URI.
+		Value::Strand(uri) if crate::fnc::util::http::uri_is_valid(&uri) => Ok(uri),
 		_ => Err(Error::InvalidArguments {
 			name: fn_name.to_owned(),
 			// Assumption is that URI is first argument.
-			message: String::from("The first argument should be a string."),
+			message: String::from("The first argument should be a string containing a valid URI."),
 		}),
 	}
 }

lib/src/fnc/util/http/mod.rs

@@ -6,6 +6,10 @@ use crate::sql::value::Value;
 use surf::Client;
 use surf::Config;
 
+pub(crate) fn uri_is_valid(uri: &str) -> bool {
+	surf::Url::parse(uri).is_ok()
+}
+
 pub async fn head(uri: Strand, opts: impl Into<Object>) -> Result<Value, Error> {
 	// Set a default client with no timeout
 	let cli: Client = Config::new().set_timeout(None).try_into().unwrap();