ref: parse event_id from raw envelopes

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: jpnurmi

src/sentry_envelope.c

@@ -230,7 +230,15 @@ sentry_uuid_t
 sentry__envelope_get_event_id(const sentry_envelope_t *envelope)
 {
     if (envelope->is_raw) {
-        return sentry_uuid_nil();
+        const char *payload = envelope->contents.raw.payload;
+        size_t payload_len = envelope->contents.raw.payload_len;
+        const char *newline = memchr(payload, '\n', payload_len);
+        size_t header_len = newline ? (size_t)(newline - payload) : payload_len;
+        sentry_value_t header = sentry__value_from_json(payload, header_len);
+        sentry_uuid_t event_id = sentry_uuid_from_string(sentry_value_as_string(
+            sentry_value_get_by_key(header, "event_id")));
+        sentry_value_decref(header);
+        return event_id;
     }
     return sentry_uuid_from_string(sentry_value_as_string(
         sentry_value_get_by_key(envelope->contents.items.headers, "event_id")));

src/sentry_envelope.h

@@ -27,8 +27,8 @@ sentry_envelope_t *sentry__envelope_from_path(const sentry_path_t *path);
 
 /**
  * This returns the UUID of the event associated with this envelope.
- * If there is no event inside this envelope, or the envelope was previously
- * loaded from disk, the empty nil UUID will be returned.
+ * If there is no event inside this envelope, the empty nil UUID will be
+ * returned.
  */
 sentry_uuid_t sentry__envelope_get_event_id(const sentry_envelope_t *envelope);
 

tests/unit/test_envelopes.c

@@ -377,6 +377,65 @@ SENTRY_TEST(write_raw_envelope_to_file)
     sentry_close();
 }
 
+SENTRY_TEST(raw_envelope_event_id)
+{
+    sentry_envelope_t *envelope = create_test_envelope();
+    const char *test_file_str = SENTRY_TEST_PATH_PREFIX "sentry_test_envelope";
+    sentry_path_t *test_file_path = sentry__path_from_str(test_file_str);
+    TEST_CHECK_INT_EQUAL(
+        sentry_envelope_write_to_file(envelope, test_file_str), 0);
+
+    sentry_envelope_t *raw_envelope
+        = sentry__envelope_from_path(test_file_path);
+    TEST_CHECK(!!raw_envelope);
+
+    sentry_uuid_t event_id = sentry__envelope_get_event_id(raw_envelope);
+    char event_id_str[37];
+    sentry_uuid_as_string(&event_id, event_id_str);
+    TEST_CHECK_STRING_EQUAL(
+        event_id_str, "c993afb6-b4ac-48a6-b61b-2558e601d65d");
+
+    sentry__path_remove(test_file_path);
+    sentry__path_free(test_file_path);
+    sentry_envelope_free(envelope);
+    sentry_envelope_free(raw_envelope);
+
+    // missing event_id
+    const char header_no_event_id[]
+        = "{\"dsn\":\"https://foo@sentry.invalid/42\"}\n{}";
+    test_file_path = sentry__path_from_str(test_file_str);
+    TEST_CHECK_INT_EQUAL(
+        sentry__path_write_buffer(
+            test_file_path, header_no_event_id, sizeof(header_no_event_id) - 1),
+        0);
+    raw_envelope = sentry__envelope_from_path(test_file_path);
+    TEST_CHECK(!!raw_envelope);
+    event_id = sentry__envelope_get_event_id(raw_envelope);
+    TEST_CHECK(sentry_uuid_is_nil(&event_id));
+    sentry__path_remove(test_file_path);
+    sentry__path_free(test_file_path);
+    sentry_envelope_free(raw_envelope);
+
+    // missing newline
+    const char header_no_newline[]
+        = "{\"event_id\":\"c993afb6-b4ac-48a6-b61b-2558e601d65d\"}";
+    test_file_path = sentry__path_from_str(test_file_str);
+    TEST_CHECK_INT_EQUAL(sentry__path_write_buffer(test_file_path,
+                             header_no_newline, sizeof(header_no_newline) - 1),
+        0);
+    raw_envelope = sentry__envelope_from_path(test_file_path);
+    TEST_CHECK(!!raw_envelope);
+    event_id = sentry__envelope_get_event_id(raw_envelope);
+    sentry_uuid_as_string(&event_id, event_id_str);
+    TEST_CHECK_STRING_EQUAL(
+        event_id_str, "c993afb6-b4ac-48a6-b61b-2558e601d65d");
+    sentry__path_remove(test_file_path);
+    sentry__path_free(test_file_path);
+    sentry_envelope_free(raw_envelope);
+
+    sentry_close();
+}
+
 SENTRY_TEST(read_envelope_from_file)
 {
     const char *test_file_str = SENTRY_TEST_PATH_PREFIX "sentry_test_envelope";

tests/unit/tests.inc

@@ -146,6 +146,7 @@ XX(procmaps_parser)
 XX(propagation_context_init)
 XX(query_consent_requirement)
 XX(rate_limit_parsing)
+XX(raw_envelope_event_id)
 XX(read_envelope_from_file)
 XX(read_write_envelope_to_file_null)
 XX(read_write_envelope_to_invalid_path)