Function save_log 

pub async fn save_log(
    env: &Env,
    url: &str,
    message: &str,
    code: u16,
    data: &Value,
    severity: Severity,
) -> Result<()>

Saves a log message to the logging service.

Automatically determines the service name from the SERVICE_NAME environment variable if not provided. Sends the log to the logger service’s /log endpoint via HTTP. The timestamp is automatically set to the current time if not provided.

Arguments

• env: The Cloudflare Workers environment for accessing variables.
• url: The route or URL associated with the log.
• message: The log message.
• code: The HTTP status code or error code.
• data: Optional JSON context data.
• severity: The severity of the log.

Returns

• Ok(()) if the log was sent successfully.
• Err(anyhow::Error) if the operation failed.

Environment Variables

• SERVICE_NAME: The name of the service (optional, defaults to “unknown”).
• LOGGER_URL: The base URL of the logger service (required, e.g., “https://logger.example.com”).
• LOGGER_AUTH: The authentication token for the logger service (required, e.g., “zoK86OpyGp2R+ia2RcC4TyXLKHZQ8Gpu48CQekQCcDM=”).

Example

use serde_json::json;
use worker::Env;
use logging::{save_log, Severity};

async fn example(env: &Env) -> anyhow::Result<()> {
    save_log(
        env,
        "/api/example",
        "Something happened",
        200,
        &json!({"user_id": 123}),
        Severity::Info,
    ).await?;
    Ok(())
}