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#include "http.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
const char * status_str[] = {
[STATUS_OK] = "200 OK",
[STATUS_BAD_REQUEST] = "400 Bad Request",
[STATUS_METHOD_NOT_ALLOWED] = "405 Method Not Allowed",
[STATUS_REQUEST_TIMEOUT] = "408 Request Timeout",
[STATUS_INTERNAL_SERVER_ERROR] = "500 Internal Server Error",
[STATUS_NOT_IMPLEMENTED] = "501 Not Implemented",
[STATUS_VERSION_NOT_SUPPORTED] = "505 Version Not Supported",
};
/// Sends a simple response only with a status to the client.
/// \param fd File descriptor of the client socket
/// \param status HTTP response status code
/// \return Negative value if an error was encountered; numbers of bytes written otherwise
int respond_only_status(const int fd, const enum status status)
{
static const char * pattern =
"HTTP/1.1 %s\r\n"
"Connection: close\r\n"
"\r\n";
return dprintf(fd, pattern, status_str[status]);
}
/// Sends a response with a status and a body to the client.
/// \param fd File descriptor of the client socket
/// \param status HTTP response status code
/// \param body Content that will be sent
/// \return Negative value if an error was encountered; numbers of bytes written otherwise
int respond_with_body(const int fd, const enum status status, const char * body)
{
static const char * pattern =
"HTTP/1.1 %s\r\n"
"Connection: close\r\n"
"Content-Type: text/plain\r\n"
"\r\n";
if (0 > dprintf(fd, pattern, status_str[status]))
{
return -1; // TODO: Handle errors properly
}
return write(fd, body, strlen(body));
}
/// Collects request between calls to `poll`.
/// \param fd Client socket
/// \param request Buffer with the request content
/// \return Number of bytes parsed, -1 if an error occured or 0 if expects more data
int collect_request(const int fd, char ** request)
{
static const int size = 4096;
if (NULL == *request)
{
*request = malloc(size);
if (NULL == *request)
{
return -1;
}
}
// TODO: Expand buffer until EAGAIN or arbitrary limit
int length = read(fd, *request, size - 1);
if (0 == length || (-1 == length && EWOULDBLOCK != errno && EAGAIN != errno))
{
return -1; // TODO: Handle errors properly
}
(*request)[length] = 0;
return length;
}
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