gemini.c

#include <string.h>
#include "geminid.h"
 
#ifndef MAX_PATH
# define MAX_PATH 1024
#endif /* !MAX_PATH */
 
char *
gemini_get_path(const char *req)
{
    static char path[MAX_PATH];
    size_t i;
    size_t j;
    int has_pass_hostname;
    size_t len;
 
    len = strlen(req);
    if (req[len - 2] != '\r' || req[len - 1] != '\n')
    {
        return (NULL);
    }
 
    if (strncmp("gemini://", req, 9) != 0)
    {
        return (NULL);
    }
 
    has_pass_hostname = 0;
    for (i = 9, j = 0 /* skip gemi..:// */; i < len && j < MAX_BUFFER; i++)
    {
        if (req[i] == '\r' || req[i] == '\n')
        {
            break;
        }
 
        if (!has_pass_hostname)
        {
            if (req[i] != '/')
            {
                continue;
            }
            has_pass_hostname = 1;
        }
 
        path[j++] = req[i];
    }
 
    path[j] = '\0';
    if (strcmp("/", path) == 0)
    {
        strcpy(path, "/index.gmi");
    }
    return (path);
}
 
void
gemini_protocol_handler(SSL *client, const char *srv_dir)
{
    char buffer[MAX_BUFFER];
    ssize_t read;
    char *path;
 
    if ((read = SSL_read(client, buffer, MAX_BUFFER)) > 0)
    {
        buffer[read] = '\0';
        printf("%s", buffer);
        path = gemini_get_path(buffer);
        if (path == NULL)
        {
            sprintf(buffer, "59 Invalid URI\r\n");
            SSL_write(client, buffer, MAX_BUFFER);
            return;
        }
        printf("%s\n", path);
    }
}