logger.c File Reference

Request logging middleware — text and JSON structured formats. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "csilk/core/internal.h"
#include "csilk/csilk.h"
#include "csilk/reflection/reflect.h"

Include dependency graph for logger.c:

Data Structures
struct	csilk_req_log_t
	Request log entry for JSON structured logging. More...

Macros
#define	REQ_LOG_MAP(X)

Functions
void	csilk_logger_handler (csilk_ctx_t *c)
	Request logging middleware — logs method, path, status, and duration.

Detailed Description

Request logging middleware — text and JSON structured formats.

Uses the csilk reflection engine for JSON serialization of request log entries.

Copyright

MIT License

---

Data Structure Documentation

csilk_req_log_t

struct csilk_req_log_t

Request log entry for JSON structured logging.

This struct captures the essential fields of an HTTP request for log output. It is registered with the CSILK reflection engine (via CSILK_REGISTER_REFLECT) so it can be automatically marshalled to JSON for structured log entries.

Data Fields
double	duration	Request duration in seconds
char	method[8]	HTTP method
char	path[256]	Request path
char	remote_addr[46]	Client IP address
int32_t	status	Response status code

Macro Definition Documentation

REQ_LOG_MAP

#define REQ_LOG_MAP

(

X

)

Value:

    X(csilk_req_log_t, method, CSILK_TYPE_STRING, 8, 0, false, NULL)                           \
    X(csilk_req_log_t, path, CSILK_TYPE_STRING, 256, 0, false, NULL)                           \
    X(csilk_req_log_t, status, CSILK_TYPE_INT32, sizeof(int32_t), 0, false, NULL)              \
    X(csilk_req_log_t, duration, CSILK_TYPE_DOUBLE, sizeof(double), 0, false, NULL)            \
    X(csilk_req_log_t, remote_addr, CSILK_TYPE_STRING, 46, 0, false, NULL)

Function Documentation

csilk_logger_handler()

void csilk_logger_handler

(

csilk_ctx_t *

c

)

Request logging middleware — logs method, path, status, and duration.

Logging middleware handler. Logs request method, path, and processing time.

Records the start time of the request using a high-resolution monotonic clock (CLOCK_MONOTONIC), proceeds to the next handler via csilk_next(), and then calculates the total elapsed time. It automatically selects between plain-text logging and structured JSON logging based on the global logger configuration.

In JSON mode, the request details are marshalled into a csilk_req_log_t struct and logged via the reflection-based JSON logger. In text mode, a simple "[HTTP] METHOD PATH STATUS DURATION" line is emitted.

If a request ID is set on the context, it is propagated to the logger's thread-local state for correlating log entries.

Parameters

c	The request context.

Note

This middleware should be one of the first in the pipeline so that the timing covers the entire request lifecycle.

Warning

csilk_next() is called BEFORE the log output; the response status must therefore be set by downstream handlers before returning.