native_http_response.c

Go to the documentation of this file.

/**
 * @file
 * @brief Implements native HTTP response writing helpers.
 */
 
#include "native_http_response.h"
 
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
int native_connection_printf(NativeConnection *connection, const char *format, ...) {
  char stack_buf[1024];
  va_list args;
  int len;
  va_start(args, format);
  len = vsnprintf(stack_buf, sizeof(stack_buf), format, args);
  va_end(args);
  if (len < 0) {
    return -1;
  }
  if ((size_t)len < sizeof(stack_buf)) {
    return native_connection_write(connection, stack_buf, (size_t)len);
  }
  {
    char *heap_buf = (char *)malloc((size_t)len + 1);
    if (heap_buf == NULL) {
      return -1;
    }
    va_start(args, format);
    vsnprintf(heap_buf, (size_t)len + 1, format, args);
    va_end(args);
    len = native_connection_write(connection, heap_buf, (size_t)len);
    free(heap_buf);
    return len;
  }
}
 
void native_send_text_response(NativeConnection *connection, int status, const char *status_text, const char *body) {
  size_t body_len = strlen(body);
  native_connection_printf(
    connection,
    "HTTP/1.1 %d %s\r\n"
    "Content-Type: text/plain; charset=utf-8\r\n"
    "Content-Length: %zu\r\n"
    "Connection: close\r\n"
    "\r\n%s",
    status,
    status_text,
    body_len,
    body
  );
}