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#define _POSIX_C_SOURCE 200809L
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <glob.h>
#include <libgen.h>
#include <unistd.h>
#include <sys/stat.h>
#include <marxup.h>
static char *wikititle = "a wiki";
static char *id = "anonymous";
static char *links[][2] = {
{ "home", "home" },
{ "planer", "planer" },
0
};
static char *(*authenticate)() = NULL;
static char *script;
static char *base;
static const char *badchars = "\\?%:|\"<> ";
int writable(char *path) {
struct stat s;
if(!stat(path, &s)) {
if(S_ISREG(s.st_mode))
return !access(path, W_OK);
else if(S_ISDIR(s.st_mode))
return 0;
}
char *dir = dirname(strdup(path));
if(!stat(dir, &s)) {
if(S_ISDIR(s.st_mode))
return !access(dir, W_OK);
}
return 0;
}
void head(char *title, char *link, char *what) {
printf("Content-Type: text/html; charset=utf-8\n\n");
printf("<!doctype html>\n");
printf("<title>%s ยท %s</title>\n", wikititle, title);
printf("<link rel='stylesheet' href='%s/wiki.css'>\n", base);
if(link && what)
printf("<h1><a data-text='%s' href='%s' >%s</a></h1>", what, link, title);
else
printf("<h1>%s</h1>", title);
}
void foot(int file) {
printf("<hr>\n");
printf("<p>");
for(int i = 0; *links[i]; i++)
printf("<a href='%s/%s'>%s</a> ", script, links[i][1], links[i][0]);
if(!file) return;
printf("<span style='float: right'>");
printf("%s ", id);
printf("<a href='?t'>text/plain</a>");
printf("</span>\n");
}
char *clean(char *p) {
char *dup = strdup(basename(p));
char *x = dup;
while(*x) {
if(*x == '-')
*x = ' ';
x++;
}
return dup;
}
int legit(char *page) {
if(!page) return 0;
if(!strcmp(page, "/")) return 0;
if(strstr(page, "..")) return 0;
if(strcspn(page, badchars) < strlen(page)) return 0;
return 1;
}
int redirect(char *path) {
printf("Status: 303\n");
if(*path == '?')
printf("Location: %s\n\n", path);
else
printf("Location: %s/%s\n\n", script, path);
return 0;
}
int unauthorized(int status) {
printf("Status: %d\n", status);
if(status == 401)
printf("WWW-Authenticate: Basic realm='Kya'\n");
printf("Content-Type: text/plain; charset=utf-8\n\n");
printf("No.\n");
return 1;
}
int edit(char *path) {
if(!writable(path)) return unauthorized(403);
FILE *fp = fopen(path, "r");
char *title = clean(path);
fp ? head(title, path, "vis") : head(title, NULL, NULL);
char buffer[sysconf(_SC_PAGESIZE)];
printf("<form method='post' enctype='text/plain'>\n");
printf("<p><textarea name=text rows=24 cols=72>");
if(fp)
while(fgets(buffer, sizeof(buffer), fp))
printf("%s", buffer);
printf("</textarea>\n");
printf("<p><input type=submit value=Update>");
printf("</form>");
foot(1);
if(fp) fclose(fp);
return 0;
}
int post(char *path) {
char *header, *data;
int clen;
header = getenv("CONTENT_LENGTH");
if(!header) return redirect(path);
clen = atoi(header);
data = calloc(1, clen + 1);
fread(data, clen, 1, stdin);
if(strncmp(data, "text=", 5))
return redirect(path);
FILE *fp = fopen(path, "w");
if(!fp) return redirect(path);
fwrite(data + 5, clen - 5, 1, fp);
fputc('\0', fp);
fclose(fp);
return redirect(path);
}
int list(char *raw, int dir) {
int len = strlen(raw);
char *pattern = malloc(len + 3);
if(dir)
snprintf(pattern, len + 3, "%s/*", raw);
else
snprintf(pattern, len + 1, "%s", raw);
glob_t res;
if(glob(pattern, GLOB_MARK, NULL, &res)) {
head("ingen treff", NULL, NULL);
foot(0);
return 0;
}
head("treff", NULL, NULL);
char *path;
printf("<ul class='glob'>");
for(int i = 0; i < res.gl_pathc; i++) {
path = res.gl_pathv[i];
printf("<li><a href='%s/%s'>%s</a>", script, path, path);
}
printf("</ul>");
foot(0);
free(pattern);
return 0;
}
int text(char *path) {
FILE *fp = fopen(path, "r");
if(fp) {
char buffer[sysconf(_SC_PAGESIZE)];
printf("Content-Type: text/plain; charset=utf-8\n\n");
while(fgets(buffer, sizeof(buffer), fp))
printf("%s", buffer);
}
fclose(fp);
return 0;
}
int view(char *path) {
struct stat s;
stat(path, &s);
if(S_ISDIR(s.st_mode))
return list(path, 1);
FILE *fp = fopen(path, "r");
if(!fp) return redirect("?e");
char *title = clean(path);
writable(path) ? head(title, "?e", "rediger") : head(title, NULL, NULL);
marxup(fp, stdout);
foot(1);
return 0;
}
int main(int argc, char **argv) {
char *method = getenv("REQUEST_METHOD");
char *page = getenv("PATH_INFO");
char *query = getenv("QUERY_STRING");
if(!method) method = "GET";
if(!script) script = getenv("SCRIPT_NAME");
if(!script) script = "";
if(!base) base = strdup(dirname(strdup(script)));
if(authenticate && !(id = authenticate())) return unauthorized(401);
if(!legit(page++)) return redirect("home");
setenv("MARXUP_HEADER", "2", 1);
setenv("MARXUP_PREFIX", base, 1);
chdir("pages");
if(!strncmp(method, "POST", 4)) return post(page);
while(query && *query) {
switch(*query) {
case 'e': return edit(page);
case 't': return text(page);
// case 'p': return
}
query++;
}
if(strchr(page, '*'))
return list(page, 0);
return view(page);
}
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