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#define _POSIX_C_SOURCE 200809L
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <glob.h>
#include <libgen.h>
#include <time.h>
#include <unistd.h>
#include <sys/stat.h>
#include <marxup.h>
#include "config.h"
static const char *badchars = "\\?%:|\"<> ";
int writable(char *path) {
struct stat s;
if(!stat(path, &s)) {
if(S_ISREG(s.st_mode))
return !eaccess(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 !eaccess(dir, W_OK);
}
return 0;
}
void head(char *page, char *link, char *what) {
printf("Content-Type: text/html; charset=utf-8\n\n");
printf("<!doctype html>\n");
printf("<title>%s · %s</title>\n", title, page);
printf("<link rel='stylesheet' type='text/css' href='%s/wiki.css'>\n", base);
printf("<script src='%s/wiki.js'></script>\n", base);
if(link && what && !strcmp(what, "rediger"))
printf("<h1><a data-text='%s' href='%s'>%s</a></h1>\n", what, link, page);
else if(link && what)
printf("<h1><a data-text='%s' href='%s/%s'>%s</a></h1>\n", what, base, link, page);
else
printf("<h1>%s</h1>\n", page);
}
void foot(int file) {
printf("<hr>\n");
printf("<p>");
for(int i = 0; *links[i]; i++) {
if(*links[i][1] == '/' || strstr(links[i][1], "://"))
printf("<a href='%s'>%s</a> ", links[i][1], links[i][0]);
else
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 problem(int status, char *message) {
printf("Status: %d\n", status);
printf("Content-Type: text/plain\n\n");
printf("%s\n", message);
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");
fp ? head(path, path, "vis") : head(path, NULL, NULL);
char buffer[sysconf(_SC_PAGESIZE)];
printf("<form method='post'>\n");
printf("<p class='edit'>\n");
if(orz)
printf("<a id='orz' href='#'>@picto</a><br>\n");
printf("<textarea name=t 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 store(char *raw, int len) {
char *dir = dirname(strdup(raw));
char *id = basename(strdup(raw));
if(chdir(dir))
return problem(404, "Not found");
char path[strlen(id) + strlen(loft) + 256];
time_t epoch = time(NULL);
snprintf(path, 512, "%s/%s.%d", loft, id, (int) epoch);
FILE *fp = fopen(path, "w");
if(!fp) return redirect("FFFF");
int pos = 0;
unsigned int decoded;
char buffer[3] = { 0 };
for(int i = 0; i < len; i++) {
buffer[pos] = getchar();
if(buffer[pos] == '+') buffer[pos] = ' ';
if(buffer[pos] == '&') { buffer[pos] = '\0'; break; }
if(pos == 2) {
if(buffer[0] == '%' && isxdigit(buffer[1]) && isxdigit(buffer[2])) {
sscanf(buffer, "%%%2x", &decoded);
fprintf(fp, "%c", decoded);
memset(buffer, 0, 3);
pos = 0;
} else {
fprintf(fp, "%c", buffer[0]);
memmove(buffer, &buffer[1], 2);
buffer[2] = 0;
}
}
else pos++;
}
fprintf(fp, "%.3s", buffer);
fputc('\0', fp);
fclose(fp);
unlink(id);
symlink(path, id);
return 0;
}
int post(char *path) {
char *header;
int clen;
header = getenv("CONTENT_LENGTH");
if(!header) return redirect(path);
clen = atoi(header);
while(clen > 1)
if(clen--, getchar() == 't')
if(clen--, getchar() == '=')
store(path, clen);
return redirect(path);
}
// gjør denne penere!
int list(char *raw, int dir, int inc) {
int len = strlen(raw);
char *pattern = malloc(len + 3);
if(len > 0 && raw[len - 1] == '/')
raw[len - 1] = '\0';
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)) {
if(!inc) {
head("ingen treff", NULL, NULL);
foot(0);
}
return 0;
}
if(!inc)
head("treff", NULL, NULL);
char *path;
printf("<ul class='glob'>");
for(int i = 0; i < res.gl_pathc; i++) {
path = res.gl_pathv[i];
if(*path == '.' && *path + 1 == '/') path += 2;
printf("<li><a href='%s/%s'>%s</a>", script, path, path);
}
printf("</ul>");
if(!inc)
foot(0);
free(pattern);
return 0;
}
int text(char *path, char *type) {
FILE *fp = fopen(path, "r");
if(fp) {
char buffer[sysconf(_SC_PAGESIZE)];
printf("Content-Type: %s; charset=utf-8\n\n", type);
while(fgets(buffer, sizeof(buffer), fp))
printf("%s", buffer);
}
fclose(fp);
return 0;
}
void include(FILE *out, char *path) {
struct stat s;
int plain = 0;
if(*path == 't')
plain = 1, path++;
while(isspace(*path)) path++;
if(!legit(path)) return;
if(*path == '/') return;
stat(path, &s);
if(S_ISDIR(s.st_mode)) {
list(path, 1, 1);
return;
}
FILE *fp = fopen(path, "r");
if(!fp) return;
if(plain) {
printf("<pre>");
int c;
while((c = fgetc(fp)) != EOF) {
switch(c) {
case '&': printf("&"); break;
case '<': printf("<"); break;
case '>': printf(">"); break;
default: putc(c, stdout);
}
}
printf("</pre>");
} else {
marxup(fp, out, NULL);
}
fclose(fp);
}
void magic(FILE *out, char *line) {
switch(*line++) {
case 'i': include(out, line); break;
default: fprintf(out, "WHAT: %s\n", line); return;
}
}
int view(char *path) {
struct stat s;
stat(path, &s);
if(S_ISDIR(s.st_mode))
return list(path, 1, 0);
FILE *fp = fopen(path, "r");
if(!fp) return redirect("?e");
writable(path) ? head(path, "?e", "rediger") : head(path, NULL, NULL);
marxup(fp, stdout, magic);
foot(1);
return 0;
}
int main(int argc, char **argv) {
char *page = getenv("PATH_INFO");
char *qstr = getenv("QUERY_STRING");
char *verb = getenv("REQUEST_METHOD");
if(!page && argc > 1) page = argv[1];
if(!qstr && argc > 2) qstr = argv[2];
if(!verb) verb = "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);
setenv("MARXUP_WIKI", "1", 1);
if(chdir(pages))
return problem(503, "Service unavailable");
if(!strncmp(verb, "POST", 4)) return post(page);
if(strchr(page, '*'))
return list(page, 0, 0);
while(qstr && *qstr) {
switch(*qstr) {
case 'e': return edit(page);
case 't': return text(page, "text/plain");
case 'c': return text(page, "text/css");
}
qstr++;
}
return view(page);
}
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