fix(helper): bind ASR ingress to fixture generation

cai

2026-08-25 caeed9acdc676aa10f788e81edf45892b8cdcc8e

 src/asr_realtime.rs

@@ -34,9 +34,61 @@
pub(crate) struct AudioIngressMetadata {
    pub(crate) input_source_category: String,
    pub(crate) client_fixture_sequence: String,
    pub(crate) input_generation: u64,
    pub(crate) language: Option<String>,
}

impl AudioIngressMetadata {
    pub(crate) const ORIGIN_STATUSES: [&'static str; 8] = [
        "controlled_fixture_bound",
        "ordinary_mic_absent",
        "participant_attributes_absent",
        "participant_attributes_invalid",
        "sequence_absent",
        "sequence_replayed_or_regressed",
        "wrong_participant_or_track",
        "origin_unprovable",
    ];

    pub(crate) fn origin_status(attributes: &HashMap<String, String>) -> &'static str {
        let source = attributes.get("inputSourceCategory").map(String::as_str);
        let sequence = attributes.get("clientFixtureSequence").map(String::as_str);
        let generation = attributes.get("inputGeneration").map(String::as_str);
        match (source, sequence) {
            (None, None) => "ordinary_mic_absent",
            (Some("controlled_fixture"), Some(sequence)) if valid_sequence(sequence) => {
                match generation {
                    Some(value) if valid_generation(value) => "controlled_fixture_bound",
                    None => "participant_attributes_absent",
                    Some(_) => "participant_attributes_invalid",
                }
            }
            (Some("controlled_fixture"), None) => "sequence_absent",
            (Some("controlled_fixture"), Some(_)) => "participant_attributes_invalid",
            (Some(_), _) | (None, Some(_)) => "participant_attributes_invalid",
        }
    }

    pub(crate) fn rejection_status(reason: &str) -> &'static str {
        match reason {
            "incomplete_metadata" => "participant_attributes_absent",
            "invalid_source_or_sequence" => "participant_attributes_invalid",
            _ => "origin_unprovable",
        }
    }

    pub(crate) fn rejected_origin_status(
        reason: &str,
        attributes: &HashMap<String, String>,
    ) -> &'static str {
        let status = Self::origin_status(attributes);
        if status == "sequence_absent" {
            status
        } else {
            Self::rejection_status(reason)
        }
    }

    pub(crate) fn from_participant(
        attributes: &HashMap<String, String>,
    ) -> Result<Option<Self>, &'static str> {
@@ -45,9 +97,24 @@
        match (source, sequence) {
            (None, None) => Ok(None),
            (Some("controlled_fixture"), Some(sequence)) if valid_sequence(sequence) => {
                let generation = attributes
                    .get("inputGeneration")
                    .ok_or("missing_generation")?
                    .parse::<u64>()
                    .ok()
                    .filter(|value| *value > 0)
                    .ok_or("invalid_generation")?;
                let language = attributes.get("language").map(String::as_str);
                if let Some(language) = language {
                    if !valid_language(language) {
                        return Err("invalid_language");
                    }
                }
                Ok(Some(Self {
                    input_source_category: "controlled_fixture".to_string(),
                    client_fixture_sequence: sequence.to_string(),
                    input_generation: generation,
                    language: language.map(str::to_string),
                }))
            }
            (Some(_), _) => Err("invalid_source_or_sequence"),
@@ -62,6 +129,14 @@
        && value
            .chars()
            .all(|ch| ch.is_ascii_alphanumeric() || matches!(ch, '-' | '_' | '.'))
}

fn valid_generation(value: &str) -> bool {
    value.parse::<u64>().is_ok_and(|generation| generation > 0)
}

fn valid_language(value: &str) -> bool {
    matches!(value, "ja-JP" | "zh-CN")
}

impl RealtimeAsrConfig {
@@ -372,7 +447,15 @@
    if let Some(metadata) = ingress_metadata {
        line["inputSourceCategory"] = json!(metadata.input_source_category);
        line["clientFixtureSequence"] = json!(metadata.client_fixture_sequence);
        line["inputGeneration"] = json!(metadata.input_generation);
        if let Some(language) = metadata.language.as_deref() {
            line["language"] = json!(language);
        }
    }
    line["audioIngressOriginStatus"] = json!(match ingress_metadata {
        Some(_) => "controlled_fixture_bound",
        None => "ordinary_mic_absent",
    });
    encode_line(line)
}

@@ -483,6 +566,7 @@
        assert_eq!("pcm_s16le", value["audio"]["format"]);
        assert_eq!(16000, value["audio"]["sampleRate"]);
        assert_eq!(1, value["audio"]["channels"]);
        assert_eq!("ordinary_mic_absent", value["audioIngressOriginStatus"]);
    }

    #[test]
@@ -496,14 +580,22 @@
            "clientFixtureSequence".to_string(),
            "fixture-01".to_string(),
        );
        attributes.insert("inputGeneration".to_string(), "1".to_string());
        attributes.insert("language".to_string(), "ja-JP".to_string());
        let metadata =
            AudioIngressMetadata::from_participant(&attributes).expect("valid attributes");
        assert_eq!(
            Some(AudioIngressMetadata {
                input_source_category: "controlled_fixture".to_string(),
                client_fixture_sequence: "fixture-01".to_string(),
                input_generation: 1,
                language: Some("ja-JP".to_string()),
            }),
            metadata
        );
        assert_eq!(
            "controlled_fixture_bound",
            AudioIngressMetadata::origin_status(&attributes)
        );

        attributes.insert(
@@ -518,6 +610,62 @@
            Ok(None),
            AudioIngressMetadata::from_participant(&HashMap::new())
        );
        attributes.remove("clientFixtureSequence");
        assert_eq!(
            "sequence_absent",
            AudioIngressMetadata::origin_status(&attributes)
        );
        attributes.insert(
            "clientFixtureSequence".to_string(),
            "bad sequence".to_string(),
        );
        assert_eq!(
            "participant_attributes_invalid",
            AudioIngressMetadata::origin_status(&attributes)
        );
        assert_eq!(
            "ordinary_mic_absent",
            AudioIngressMetadata::origin_status(&HashMap::new())
        );
        attributes.insert(
            "clientFixtureSequence".to_string(),
            "fixture-01".to_string(),
        );
        attributes.insert("language".to_string(), "ja-jp".to_string());
        assert_eq!(
            Err("invalid_language"),
            AudioIngressMetadata::from_participant(&attributes)
        );
        attributes.insert("language".to_string(), "ja-JP".to_string());
        assert_eq!(
            "participant_attributes_absent",
            AudioIngressMetadata::rejection_status("incomplete_metadata")
        );
        assert_eq!(
            "participant_attributes_invalid",
            AudioIngressMetadata::rejection_status("invalid_source_or_sequence")
        );
        assert_eq!(
            "origin_unprovable",
            AudioIngressMetadata::rejection_status("sequence_replayed")
        );
        assert_eq!(
            "origin_unprovable",
            AudioIngressMetadata::rejection_status("wrong_participant")
        );
        assert_eq!(
            "origin_unprovable",
            AudioIngressMetadata::rejection_status("unknown")
        );
        let missing_sequence = HashMap::from([(
            "inputSourceCategory".to_string(),
            "controlled_fixture".to_string(),
        )]);
        assert_eq!(
            "sequence_absent",
            AudioIngressMetadata::rejected_origin_status("incomplete_metadata", &missing_sequence)
        );
        assert_eq!(8, AudioIngressMetadata::ORIGIN_STATUSES.len());
    }

    #[test]
@@ -525,6 +673,8 @@
        let bound = AudioIngressMetadata {
            input_source_category: "controlled_fixture".to_string(),
            client_fixture_sequence: "fixture-01".to_string(),
            input_generation: 1,
            language: Some("ja-JP".to_string()),
        };
        let absent = serde_json::from_slice::<serde_json::Value>(
            &session_start_line("call-001", "trace-001", "turn-0001", "nonce-001", None)
@@ -532,6 +682,7 @@
        )
        .expect("absent json");
        assert!(absent.get("inputSourceCategory").is_none());
        assert_eq!("ordinary_mic_absent", absent["audioIngressOriginStatus"]);
        let with_metadata = serde_json::from_slice::<serde_json::Value>(
            &session_start_line(
                "call-001",
@@ -545,9 +696,17 @@
        .expect("bound json");
        assert_eq!("controlled_fixture", with_metadata["inputSourceCategory"]);
        assert_eq!("fixture-01", with_metadata["clientFixtureSequence"]);
        assert_eq!(1, with_metadata["inputGeneration"]);
        assert_eq!("ja-JP", with_metadata["language"]);
        assert_eq!(
            "controlled_fixture_bound",
            with_metadata["audioIngressOriginStatus"]
        );
        let next = AudioIngressMetadata {
            input_source_category: "controlled_fixture".to_string(),
            client_fixture_sequence: "fixture-02".to_string(),
            input_generation: 1,
            language: Some("zh-CN".to_string()),
        };
        let next_line = session_start_line(
            "call-001",
@@ -559,6 +718,7 @@
        .expect("next bound session line");
        let next_value: serde_json::Value = serde_json::from_slice(&next_line).expect("next json");
        assert_eq!("fixture-02", next_value["clientFixtureSequence"]);
        assert_eq!("zh-CN", next_value["language"]);
        assert_ne!(
            with_metadata["clientFixtureSequence"],
            next_value["clientFixtureSequence"]
@@ -576,6 +736,7 @@
            "clientFixtureSequence".to_string(),
            "fixture-01".to_string(),
        );
        attributes.insert("inputGeneration".to_string(), "1".to_string());
        let (url1, captured1, server1) =
            spawn_http_fixture(json!({"code": 0, "data": {"status": "cancelled"}}).to_string());
        let upload1 = RealtimeAsrUpload::start_with_participant_attributes(
@@ -626,6 +787,24 @@
    }

    #[test]
    fn controlled_fixture_session_requires_current_generation_binding() {
        let attributes = HashMap::from([
            (
                "inputSourceCategory".to_string(),
                "controlled_fixture".to_string(),
            ),
            (
                "clientFixtureSequence".to_string(),
                "fixture-01".to_string(),
            ),
        ]);
        assert_eq!(
            Err("missing_generation"),
            AudioIngressMetadata::from_participant(&attributes)
        );
    }

    #[test]
    fn maximum_audio_chunk_stays_within_java_line_limit() {
        let line = audio_chunk_line(1, &vec![0; 8_000]).expect("maximum chunk line");
        assert!(line.len() <= MAX_NDJSON_LINE_BYTES);