Template overrides in subdirs, prefetch templates
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5b6f8e5083
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4 changed files with 150 additions and 123 deletions
179
dirl.c
179
dirl.c
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@ -1,5 +1,6 @@
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/* See LICENSE file for copyright and license details. */
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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@ -31,25 +32,13 @@ suffix(int t)
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}
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static char*
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dirl_read_template(char* tpl)
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dirl_read(char* tpl)
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{
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/* Try find template in root (note that we are chroot'ed) */
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FILE* tpl_fp;
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char* tpl_abs;
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tpl_abs = calloc(strlen(tpl)+2, sizeof(char));
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if(tpl_abs == NULL) {
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if (!(tpl_fp = fopen(tpl, "r"))) {
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return NULL;
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}
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tpl_abs[0] = '/';
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strcat(tpl_abs, tpl);
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if (!(tpl_fp = fopen(tpl_abs, "r"))) {
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free(tpl_abs);
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return NULL;
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}
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free(tpl_abs);
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/* Get size of template */
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if (fseek(tpl_fp, 0L, SEEK_END) < 0) {
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@ -66,7 +55,7 @@ dirl_read_template(char* tpl)
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rewind(tpl_fp);
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/* Read template into tpl_buf */
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char* tpl_buf = (char*)malloc(sizeof(char) * tpl_size);
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char* tpl_buf = (char*)calloc(sizeof(char), tpl_size);
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if (tpl_buf == NULL) {
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fclose(tpl_fp);
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@ -91,119 +80,120 @@ dirl_read_template(char* tpl)
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return tpl_buf;
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}
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static enum status
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dirl_header_default(int fd, const struct response* res)
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/* Try to find templates up until root
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*
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* Iterates the directory hierarchy upwards. Returns the closest path containing
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* a template file or NULL if none could be found.
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*
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* Note that we are chrooted.
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*/
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static char*
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dirl_find_templ_dir(const char* start_path)
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{
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char esc[PATH_MAX];
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html_escape(res->uri, esc, sizeof(esc));
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if (dprintf(fd,
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"<!DOCTYPE html>\n"
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"<html>\n"
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" <head>\n"
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" <link rel=\"stylesheet\" href=\"/"DIRL_STYLE"\">\n"
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" <title>Index of %s</title>\n"
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" </head>\n"
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" <body>\n"
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" <h1>Index of %s</h1>\n"
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" <a href=\"..\">..</a>",
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esc,
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esc) < 0) {
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return S_REQUEST_TIMEOUT;
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char* path_buf = calloc(sizeof(char), strlen(start_path));
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strcat(path_buf, start_path);
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while (strlen(path_buf) != 0) {
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DIR* cur = opendir(path_buf);
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struct dirent* de;
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errno = 0;
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while ((de = readdir(cur))) {
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if (de->d_type == DT_REG) {
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if (strcmp(DIRL_HEADER, de->d_name) || strcmp(DIRL_ENTRY, de->d_name) ||
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strcmp(DIRL_FOOTER, de->d_name)) {
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closedir(cur);
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return path_buf;
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}
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}
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}
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char* parent = strrchr(path_buf, '/');
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(*parent) = '\0'; // strip tail from path_buf
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}
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return 0;
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free(path_buf);
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return NULL;
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}
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struct dirl_templ
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dirl_read_templ(const char* path)
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{
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struct dirl_templ templates = { .header = DIRL_HEADER_DEFAULT,
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.entry = DIRL_ENTRY_DEFAULT,
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.footer = DIRL_FOOTER_DEFAULT };
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char* templ_dir = dirl_find_templ_dir(path);
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char* header_file =
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calloc(sizeof(char), strlen(templ_dir) + strlen(DIRL_HEADER));
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strcpy(header_file, templ_dir);
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strcat(header_file, DIRL_HEADER);
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char* header = dirl_read(header_file);
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if (header)
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templates.header = header;
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free(header_file);
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char* entry_file =
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calloc(sizeof(char), strlen(templ_dir) + strlen(DIRL_ENTRY));
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strcpy(entry_file, templ_dir);
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strcat(entry_file, DIRL_ENTRY);
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char* entry = dirl_read(entry_file);
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if (entry)
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templates.entry = entry;
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free(entry_file);
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char* footer_file =
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calloc(sizeof(char), strlen(templ_dir) + strlen(DIRL_FOOTER));
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strcpy(footer_file, templ_dir);
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strcat(footer_file, DIRL_FOOTER);
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char* footer = dirl_read(footer_file);
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if (footer)
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templates.footer = footer;
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free(footer_file);
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free(templ_dir);
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return templates;
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}
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enum status
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dirl_header(int fd, const struct response* res)
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dirl_header(int fd, const struct response* res, const struct dirl_templ* templ)
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{
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char* tpl = dirl_read_template(DIRL_HEADER);
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if(tpl == NULL) {
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return dirl_header_default(fd, res);
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}
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/* Replace placeholder */
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char* nhead = replace(tpl, "{idx}", "something");
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char* nhead = replace(templ->header, "{curdir}", "something");
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/* Write header */
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write(fd, nhead, strlen(nhead));
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free(tpl);
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free(nhead);
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/* listing header */
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return 0;
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}
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static enum status
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dirl_entry_default(int fd, const struct dirent* entry)
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{
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char esc[PATH_MAX];
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html_escape(entry->d_name, esc, sizeof(esc));
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if (dprintf(fd,
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"<br />\n\t\t<a href=\"%s%s\">%s%s</a>",
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esc,
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(entry->d_type == DT_DIR) ? "/" : "",
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esc,
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suffix(entry->d_type)) < 0) {
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return S_REQUEST_TIMEOUT;
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}
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return 0;
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}
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enum status
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dirl_entry(int fd, const struct dirent* entry)
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dirl_entry(int fd, const struct dirent* entry, const struct dirl_templ* templ)
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{
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char* tpl = dirl_read_template(DIRL_ENTRY);
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if (tpl == NULL) {
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return dirl_entry_default(fd, entry);
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}
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/* Replace placeholder */
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char* nentry = replace(tpl, "{entry}", entry->d_name);
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char* nentry = replace(templ->entry, "{entry}", entry->d_name);
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/* Write entry */
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write(fd, nentry, strlen(nentry));
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free(tpl);
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free(nentry);
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return 0;
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}
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static enum status
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dirl_footer_default(int fd)
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{
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if (dprintf(fd,
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"\n"
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" </body>\n"
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"</html>") < 0) {
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return S_REQUEST_TIMEOUT;
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}
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return 0;
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}
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enum status
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dirl_footer(int fd)
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dirl_footer(int fd, const struct dirl_templ* templ)
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{
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char* tpl = dirl_read_template(DIRL_FOOTER);
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if(tpl == NULL) {
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return dirl_footer_default(fd);
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}
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/* Replace placeholder */
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char* nfoot = replace(tpl, "{idx}", "something");
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char* nfoot = replace(templ->footer, "{idx}", "something");
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/* Write footer */
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write(fd, nfoot, strlen(nfoot));
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free(tpl);
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free(nfoot);
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return 0;
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}
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@ -211,10 +201,9 @@ dirl_footer(int fd)
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int
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dirl_skip(const char* name)
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{
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(void)name; // noop; avoid unused warning
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return !strcmp(name, DIRL_HEADER) //
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return name[0] == '.' //
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|| !strcmp(name, DIRL_HEADER) //
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|| !strcmp(name, DIRL_ENTRY) //
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|| !strcmp(name, DIRL_FOOTER) //
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|| !strcmp(name, DIRL_STYLE);
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|| !strcmp(name, DIRL_STYLE); //
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}
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75
dirl.h
75
dirl.h
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@ -9,27 +9,66 @@
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#include "http.h"
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#define DIRL_HEADER ".header.tpl"
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#define DIRL_ENTRY ".entry.tpl"
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#define DIRL_ENTRY ".entry.tpl"
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#define DIRL_FOOTER ".footer.tpl"
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#define DIRL_STYLE "style.css"
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#define DIRL_STYLE "style.css"
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struct dirl_env_entry {
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char *name;
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char *value;
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};
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struct dirl_env {
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struct dirl_env_entry *entries;
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};
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/*
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* Determine if an dirlist entry should be skipped because it has special
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* meaning. Skips header-, entry-, footer templates and dirlist style css.
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/* Default template definitions
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*
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* Used if no template files can be found
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*/
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int dirl_skip(const char*);
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#define DIRL_HEADER_DEFAULT \
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"<!DOCTYPE HTML PUBLIC \" - // W3C//DTD HTML 3.2 Final//EN\">\n" \
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"<html>\n" \
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" <head>\n" \
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" <link rel=\"stylesheet\" href=\"/" DIRL_STYLE "\">\n" \
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" <title>Index of {curdir}</title>\n" \
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" </head>\n" \
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" <body>\n" \
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" <h1>Index of {curdir}</h1>\n" \
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" <a href=\"..\">..</a>\n"
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enum status dirl_header(int, const struct response*);
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enum status dirl_entry(int, const struct dirent*);
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enum status dirl_footer(int);
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#define DIRL_ENTRY_DEFAULT \
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" <br />\n" \
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" <a href=\"{entry}\">{entry}</a>\n"
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#define DIRL_FOOTER_DEFAULT \
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" </body>\n" \
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"</html>"
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struct dirl_templ
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{
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const char* header;
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const char* entry;
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const char* footer;
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};
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struct dirl_templ
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dirl_read_templ(const char* path);
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/* Determine if an dirlist entry should be skipped
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*
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* Skips:
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* - hidden files and directories
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* - special directory entries (., ..)
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* - header template: DIRL_HEADER
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* - entry template: DIRL_ENTRY
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* - footer template: DIRL_FOOTER
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* - dirlist style: DRIL_STYLE
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*/
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int
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dirl_skip(const char*);
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/* Print header into the response */
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enum status
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dirl_header(int, const struct response*, const struct dirl_templ*);
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/* Print entry into the response */
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enum status
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dirl_entry(int, const struct dirent*, const struct dirl_templ*);
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/* Print footer into the response */
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enum status
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dirl_footer(int, const struct dirl_templ*);
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#endif /* DIRL_H */
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14
resp.c
14
resp.c
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@ -40,32 +40,30 @@ resp_dir(int fd, const struct response *res)
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return S_FORBIDDEN;
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}
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/* read templates */
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struct dirl_templ templates = dirl_read_templ(res->path);
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/* listing header */
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if ((ret = dirl_header(fd, res))) {
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if ((ret = dirl_header(fd, res, &templates))) {
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return ret;
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}
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/* entries */
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for (i = 0; i < (size_t)dirlen; i++) {
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/* skip hidden files, "." and ".." */
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if (e[i]->d_name[0] == '.') {
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continue;
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}
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/* skip dirl special files */
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if(dirl_skip(e[i]->d_name)) {
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continue;
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}
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/* entry line */
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if ((ret = dirl_entry(fd, e[i]))) {
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if ((ret = dirl_entry(fd, e[i], &templates))) {
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goto cleanup;
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}
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}
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/* listing footer */
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if ((ret = dirl_footer(fd))) {
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if ((ret = dirl_footer(fd, &templates))) {
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goto cleanup;
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}
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5
util.c
5
util.c
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@ -183,7 +183,7 @@ replace(const char *src, const char *old, const char* new) {
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}
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/* Allocate enough space for the new string */
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char *buf = malloc( (sizeof(char)*src_len) + (sizeof(char)*replc*(new_len-old_len)) + 1);
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char *buf = calloc( sizeof(char), src_len + replc*(abs(new_len-old_len)) + 1);
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/* Now start replacing */
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const char *srcidx = src;
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@ -193,7 +193,8 @@ replace(const char *src, const char *old, const char* new) {
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while (replc--) {
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srcidx_old = strstr(srcidx, old);
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bufidx = strncpy(bufidx, srcidx, srcidx_old - srcidx) + (srcidx_old-srcidx);
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long repl_len = labs(srcidx_old - srcidx);
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bufidx = strncpy(bufidx, srcidx, repl_len) + repl_len;
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bufidx = strcpy(bufidx, new) + new_len;
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srcidx = srcidx_old+old_len;
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