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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>
#include <libhttpc/libhttpc.h>
#ifndef LibHTTPC_SOCK
#error LibHTTPC should be built with support of sockets for this project
#endif
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, int n)
{
struct timespec tp;
clock_gettime(CLOCK_REALTIME, &tp);
snprintf(buf, size, "/tmp/%d-%lld.%s", n, tp.tv_sec * 1000000000LL + tp.tv_nsec, ext);
return buf;
}
void CPTC_requestHandler(int fd, int n)
{
int ch;
char chbuf;
char raw_request[512];
char filenamebuf[64];
char raw_response[512], *responseadd = raw_response;
ssize_t received = recv(fd, raw_request, sizeof(raw_request), 0);
FILE *fp;
enum LibHTTPC_Method method;
struct LibHTTPC_Request request = {0};
if (received == -1)
{
perror("recv()");
return;
}
LibHTTPC_loadRequest(&request, raw_request);
method = LibHTTPC_loadMethod(request.method);
if (method != LibHTTPC_Method_GET && method != LibHTTPC_Method_HEAD)
{
LibHTTPC_dumpResponse(
&(struct LibHTTPC_Response){.status = LibHTTPC_Status_NOT_IMPLEMENTED},
raw_response,
sizeof(raw_response)
);
send(fd, raw_response, strlen(raw_response), 0);
return;
}
if (strlen(request.uri) == 1)
{
char length[20];
snprintf(length, sizeof(length), "%ld", strlen(CPTC_root));
LibHTTPC_dumpResponse(
&(struct LibHTTPC_Response)
{
.headers = (struct LibHTTPC_Header[])
{
{
LibHTTPC_dumpHeader(LibHTTPC_Header_CONTENT_TYPE),
"text/plain",
},
{
LibHTTPC_dumpHeader(LibHTTPC_Header_CONTENT_LENGTH),
length,
}
},
.header_count = 2,
.body = (method == LibHTTPC_Method_GET) ? CPTC_root : NULL,
},
raw_response,
sizeof(raw_response)
);
send(fd, raw_response, strlen(raw_response), 0);
return;
}
if (strchr(request.uri, '.') && isnumber(request.uri + 1))
{
char length[20];
*strchr(request.uri, '.') = '\0';
generate_filename(filenamebuf, sizeof(filenamebuf), "png", n);
char *in = CPTC_downloadAvatar(atoll(request.uri + 1), filenamebuf);
if (!in)
{
LibHTTPC_dumpResponse(
&(struct LibHTTPC_Response){.status = LibHTTPC_Status_FORBIDDEN},
raw_response,
sizeof(raw_response)
);
send(fd, raw_response, strlen(raw_response), 0);
return;
}
generate_filename(filenamebuf, sizeof(filenamebuf), "gif", n);
CPetPet(in, filenamebuf, 2);
printf("From %s to %s\n", in, filenamebuf);
fp = fopen(filenamebuf, "rb");
if (!fp)
{
perror("fopen()");
LibHTTPC_dumpResponse(
&(struct LibHTTPC_Response){.status = LibHTTPC_Status_INTERNAL_SERVER_ERROR},
raw_response,
sizeof(raw_response)
);
send(fd, raw_response, strlen(raw_response), 0);
goto gif_end;
}
fseek(fp, 0, SEEK_END);
snprintf(length, sizeof(length), "%ld", ftell(fp));
fseek(fp, 0, SEEK_SET);
LibHTTPC_dumpResponse(
&(struct LibHTTPC_Response)
{
.headers = (struct LibHTTPC_Header[])
{
{
LibHTTPC_dumpHeader(LibHTTPC_Header_CONTENT_TYPE),
"image/gif",
},
{
LibHTTPC_dumpHeader(LibHTTPC_Header_CONTENT_LENGTH),
length,
}
},
.header_count = 2,
},
raw_response,
sizeof(raw_response)
);
send(fd, raw_response, strlen(raw_response), 0);
if (method == LibHTTPC_Method_GET)
{
responseadd = raw_response;
while ((ch = getc(fp)) >= 0)
{
*responseadd++ = ch;
if (responseadd == raw_response + sizeof(raw_response))
{
if (send(fd, raw_response, sizeof(raw_response), 0) < 0)
{
perror("send()");
goto gif_end;
}
responseadd = raw_response;
}
}
send(fd, raw_response, responseadd - raw_response, 0);
}
gif_end:
if (fp)
fclose(fp);
remove(in);
remove(filenamebuf);
free(in);
return;
}
LibHTTPC_dumpResponse(
&(struct LibHTTPC_Response){.status=LibHTTPC_Status_NOT_FOUND},
raw_response,
sizeof(raw_response)
);
send(fd, raw_response, strlen(raw_response), 0);
}
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