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#define _POSIX_C_SOURCE 200112L
#include "cptc.h"
#include <ctype.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <cpetpet.h>
static const char *ok = "HTTP/1.0 200 OK\r\n";
static const char *notfound = "HTTP/1.0 404 Not found\r\n";
static const char *forbidden = "HTTP/1.0 403 Forbidden\r\n";
static const char *intserverror = "HTTP/1.0 500 Internal server error\r\n";
static const char *not_implemented = "HTTP/1.0 501 Not implemented\r\n";
static const char *content_length = "Content-Length: %d\r\n";
static const char *text_plain = "Content-Type: text/plain\r\n";
static const char *image_gif = "Content-Type: image/gif\r\n";
static const char *end = "\r\n";
static bool isnumber(const char *s)
{
for (const char *cp = s; *cp != '\0' && *cp != '.'; ++cp)
if (!isdigit(*cp))
return false;
return true;
}
static char *generate_filename(char *buf, size_t size, const char *ext)
{
struct timespec tp;
clock_gettime(CLOCK_REALTIME, &tp);
snprintf(buf, size, "/tmp/%lld.%s", tp.tv_sec * 1000000000LL + tp.tv_nsec, ext);
return buf;
}
void CPTC_requestHandler(int fd)
{
enum CPTC_Method method;
int ch;
char *path, chbuf;
char request[512];
char filenamebuf[64];
char response[512], *responseadd = response;
ssize_t received = recv(fd, request, sizeof(request), 0);
FILE *fp;
memset(response, 0, sizeof(response));
if (received == -1)
{
perror("recv()");
return;
}
method = request[0];
if (method != CPTC_GET && method != CPTC_HEAD)
{
send(fd, not_implemented, strlen(not_implemented), 0);
return;
}
path = strchr(request, ' ') + 1;
*strchr(path, ' ') = '\0';
puts(path);
if (strlen(path) == 1)
{
char *length = malloc(sizeof(*length) * 32);
snprintf(length, 32, content_length, strlen(CPTC_root));
strcpy(response, ok);
strcat(response, text_plain);
strcat(response, length);
strcat(response, end);
send(fd, response, strlen(response), 0);
send(fd, CPTC_root, strlen(CPTC_root), 0);
free(length);
return;
}
if (strchr(path, '.') && isnumber(path + 1))
{
char *length = malloc(sizeof(*length) * 32);
*strchr(path, '.') = '\0';
generate_filename(filenamebuf, sizeof(filenamebuf), "png");
char *in = CPTC_downloadAvatar(atoll(path + 1), filenamebuf);
if (!in)
{
strcpy(response, forbidden);
strcat(response, end);
send(fd, response, strlen(response), 0);
return;
}
generate_filename(filenamebuf, sizeof(filenamebuf), "gif");
CPetPet(in, filenamebuf, 2);
printf("From %s to %s\n", in, filenamebuf);
fp = fopen(filenamebuf, "rb");
if (!fp)
{
perror("fopen()");
strcpy(response, intserverror);
strcat(response, end);
send(fd, response, strlen(response), 0);
free(in);
free(length);
return;
}
fseek(fp, 0, SEEK_END);
snprintf(length, 32, content_length, ftell(fp));
fseek(fp, 0, SEEK_SET);
strcpy(response, ok);
strcat(response, image_gif);
strcat(response, length);
strcat(response, end);
send(fd, response, strlen(response), 0);
responseadd = response;
while ((ch = getc(fp)) >= 0)
{
*responseadd++ = ch;
if (responseadd == response + sizeof(response))
{
if (send(fd, response, sizeof(response), 0) < 0)
{
perror("send()");
goto err_send;
}
responseadd = response;
}
}
send(fd, response, responseadd - response, 0);
err_send:
fclose(fp);
remove(in);
remove(filenamebuf);
free(in);
free(length);
return;
}
strcpy(response, notfound);
strcat(response, end);
send(fd, response, strlen(response), 0);
}
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