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eb14609dc4
cgitsb/ui-shared.c
Lars Hjemli eb14609dc4 Avoid SEGFAULT on invalid requests 
When an unknown page is requested, either on the querystring or via
PATH_INFO, we end up with a null-referencing cgit_cmd. This null-
pointer is then used as argument to the hc() function (which decides
what tab to render as 'active'), but this function failed to check if a
valid cmd was specified and a SEGFAULT would occur. This patch fixes the
issue by introducing a 'fallback-cmd' which specifies what tab to render
as 'active' when no valid cmd is requested.

While at it, we now also keep track of the active repository even if an
invalid cmd was requested since we want to show the error message about
the invalid request in the correct context.

Noticed-by: Robin Redeker <elmex@ta-sa.org>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
2009-01-11 21:23:04 +01:00

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/* ui-shared.c: common web output functions
*
* Copyright (C) 2006 Lars Hjemli
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
*/
#include "cgit.h"
#include "cmd.h"
#include "html.h"
const char cgit_doctype[] =
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\n"
" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n";
static char *http_date(time_t t)
{
static char day[][4] =
{"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
static char month[][4] =
{"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Now", "Dec"};
struct tm *tm = gmtime(&t);
return fmt("%s, %02d %s %04d %02d:%02d:%02d GMT", day[tm->tm_wday],
tm->tm_mday, month[tm->tm_mon], 1900+tm->tm_year,
tm->tm_hour, tm->tm_min, tm->tm_sec);
}
void cgit_print_error(char *msg)
{
html("<div class='error'>");
html_txt(msg);
html("</div>\n");
}
char *cgit_hosturl()
{
char *host, *port;
host = getenv("HTTP_HOST");
if (host) {
host = xstrdup(host);
} else {
host = getenv("SERVER_NAME");
if (!host)
return NULL;
port = getenv("SERVER_PORT");
if (port && atoi(port) != 80)
host = xstrdup(fmt("%s:%d", host, atoi(port)));
else
host = xstrdup(host);
}
return host;
}
char *cgit_rooturl()
{
if (ctx.cfg.virtual_root)
return fmt("%s/", ctx.cfg.virtual_root);
else
return ctx.cfg.script_name;
}
char *cgit_repourl(const char *reponame)
{
if (ctx.cfg.virtual_root) {
return fmt("%s/%s/", ctx.cfg.virtual_root, reponame);
} else {
return fmt("?r=%s", reponame);
}
}
char *cgit_fileurl(const char *reponame, const char *pagename,
const char *filename, const char *query)
{
char *tmp;
char *delim;
if (ctx.cfg.virtual_root) {
tmp = fmt("%s/%s/%s/%s", ctx.cfg.virtual_root, reponame,
pagename, (filename ? filename:""));
delim = "?";
} else {
tmp = fmt("?url=%s/%s/%s", reponame, pagename,
(filename ? filename : ""));
delim = "&";
}
if (query)
tmp = fmt("%s%s%s", tmp, delim, query);
return tmp;
}
char *cgit_pageurl(const char *reponame, const char *pagename,
const char *query)
{
return cgit_fileurl(reponame,pagename,0,query);
}
const char *cgit_repobasename(const char *reponame)
{
/* I assume we don't need to store more than one repo basename */
static char rvbuf[1024];
int p;
const char *rv;
strncpy(rvbuf,reponame,sizeof(rvbuf));
if(rvbuf[sizeof(rvbuf)-1])
die("cgit_repobasename: truncated repository name '%s'", reponame);
p = strlen(rvbuf)-1;
/* strip trailing slashes */
while(p && rvbuf[p]=='/') rvbuf[p--]=0;
/* strip trailing .git */
if(p>=3 && !strncmp(&rvbuf[p-3],".git",4)) {
p -= 3; rvbuf[p--] = 0;
}
/* strip more trailing slashes if any */
while( p && rvbuf[p]=='/') rvbuf[p--]=0;
/* find last slash in the remaining string */
rv = strrchr(rvbuf,'/');
if(rv)
return ++rv;
return rvbuf;
}
char *cgit_currurl()
{
if (!ctx.cfg.virtual_root)
return ctx.cfg.script_name;
else if (ctx.qry.page)
return fmt("%s/%s/%s/", ctx.cfg.virtual_root, ctx.qry.repo, ctx.qry.page);
else if (ctx.qry.repo)
return fmt("%s/%s/", ctx.cfg.virtual_root, ctx.qry.repo);
else
return fmt("%s/", ctx.cfg.virtual_root);
}
static void site_url(char *page, char *search, int ofs)
{
char *delim = "?";
if (ctx.cfg.virtual_root) {
html_attr(ctx.cfg.virtual_root);
if (ctx.cfg.virtual_root[strlen(ctx.cfg.virtual_root) - 1] != '/')
html("/");
} else
html(ctx.cfg.script_name);
if (page) {
htmlf("?p=%s", page);
delim = "&";
}
if (search) {
html(delim);
html("q=");
html_attr(search);
delim = "&";
}
if (ofs) {
html(delim);
htmlf("ofs=%d", ofs);
}
}
static void site_link(char *page, char *name, char *title, char *class,
char *search, int ofs)
{
html("<a");
if (title) {
html(" title='");
html_attr(title);
html("'");
}
if (class) {
html(" class='");
html_attr(class);
html("'");
}
html(" href='");
site_url(page, search, ofs);
html("'>");
html_txt(name);
html("</a>");
}
void cgit_index_link(char *name, char *title, char *class, char *pattern,
int ofs)
{
site_link(NULL, name, title, class, pattern, ofs);
}
static char *repolink(char *title, char *class, char *page, char *head,
char *path)
{
char *delim = "?";
html("<a");
if (title) {
html(" title='");
html_attr(title);
html("'");
}
if (class) {
html(" class='");
html_attr(class);
html("'");
}
html(" href='");
if (ctx.cfg.virtual_root) {
html_url_path(ctx.cfg.virtual_root);
if (ctx.cfg.virtual_root[strlen(ctx.cfg.virtual_root) - 1] != '/')
html("/");
html_url_path(ctx.repo->url);
if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
html("/");
if (page) {
html_url_path(page);
html("/");
if (path)
html_url_path(path);
}
} else {
html(ctx.cfg.script_name);
html("?url=");
html_url_arg(ctx.repo->url);
if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
html("/");
if (page) {
html_url_arg(page);
html("/");
if (path)
html_url_arg(path);
}
delim = "&amp;";
}
if (head && strcmp(head, ctx.repo->defbranch)) {
html(delim);
html("h=");
html_url_arg(head);
delim = "&amp;";
}
return fmt("%s", delim);
}
static void reporevlink(char *page, char *name, char *title, char *class,
char *head, char *rev, char *path)
{
char *delim;
delim = repolink(title, class, page, head, path);
if (rev && strcmp(rev, ctx.qry.head)) {
html(delim);
html("id=");
html_url_arg(rev);
}
html("'>");
html_txt(name);
html("</a>");
}
void cgit_summary_link(char *name, char *title, char *class, char *head)
{
reporevlink(NULL, name, title, class, head, NULL, NULL);
}
void cgit_tag_link(char *name, char *title, char *class, char *head,
char *rev)
{
reporevlink("tag", name, title, class, head, rev, NULL);
}
void cgit_tree_link(char *name, char *title, char *class, char *head,
char *rev, char *path)
{
reporevlink("tree", name, title, class, head, rev, path);
}
void cgit_plain_link(char *name, char *title, char *class, char *head,
char *rev, char *path)
{
reporevlink("plain", name, title, class, head, rev, path);
}
void cgit_log_link(char *name, char *title, char *class, char *head,
char *rev, char *path, int ofs, char *grep, char *pattern)
{
char *delim;
delim = repolink(title, class, "log", head, path);
if (rev && strcmp(rev, ctx.qry.head)) {
html(delim);
html("id=");
html_url_arg(rev);
delim = "&";
}
if (grep && pattern) {
html(delim);
html("qt=");
html_url_arg(grep);
delim = "&";
html(delim);
html("q=");
html_url_arg(pattern);
}
if (ofs > 0) {
html(delim);
html("ofs=");
htmlf("%d", ofs);
}
html("'>");
html_txt(name);
html("</a>");
}
void cgit_commit_link(char *name, char *title, char *class, char *head,
char *rev)
{
if (strlen(name) > ctx.cfg.max_msg_len && ctx.cfg.max_msg_len >= 15) {
name[ctx.cfg.max_msg_len] = '\0';
name[ctx.cfg.max_msg_len - 1] = '.';
name[ctx.cfg.max_msg_len - 2] = '.';
name[ctx.cfg.max_msg_len - 3] = '.';
}
reporevlink("commit", name, title, class, head, rev, NULL);
}
void cgit_refs_link(char *name, char *title, char *class, char *head,
char *rev, char *path)
{
reporevlink("refs", name, title, class, head, rev, path);
}
void cgit_snapshot_link(char *name, char *title, char *class, char *head,
char *rev, char *archivename)
{
reporevlink("snapshot", name, title, class, head, rev, archivename);
}
void cgit_diff_link(char *name, char *title, char *class, char *head,
char *new_rev, char *old_rev, char *path)
{
char *delim;
delim = repolink(title, class, "diff", head, path);
if (new_rev && strcmp(new_rev, ctx.qry.head)) {
html(delim);
html("id=");
html_url_arg(new_rev);
delim = "&amp;";
}
if (old_rev) {
html(delim);
html("id2=");
html_url_arg(old_rev);
}
html("'>");
html_txt(name);
html("</a>");
}
void cgit_patch_link(char *name, char *title, char *class, char *head,
char *rev)
{
reporevlink("patch", name, title, class, head, rev, NULL);
}
void cgit_object_link(struct object *obj)
{
char *page, *rev, *name;
if (obj->type == OBJ_COMMIT) {
cgit_commit_link(fmt("commit %s", sha1_to_hex(obj->sha1)), NULL, NULL,
ctx.qry.head, sha1_to_hex(obj->sha1));
return;
} else if (obj->type == OBJ_TREE)
page = "tree";
else if (obj->type == OBJ_TAG)
page = "tag";
else
page = "blob";
rev = sha1_to_hex(obj->sha1);
name = fmt("%s %s", typename(obj->type), rev);
reporevlink(page, name, NULL, NULL, ctx.qry.head, rev, NULL);
}
void cgit_print_date(time_t secs, char *format, int local_time)
{
char buf[64];
struct tm *time;
if (!secs)
return;
if(local_time)
time = localtime(&secs);
else
time = gmtime(&secs);
strftime(buf, sizeof(buf)-1, format, time);
html_txt(buf);
}
void cgit_print_age(time_t t, time_t max_relative, char *format)
{
time_t now, secs;
if (!t)
return;
time(&now);
secs = now - t;
if (secs > max_relative && max_relative >= 0) {
cgit_print_date(t, format, ctx.cfg.local_time);
return;
}
if (secs < TM_HOUR * 2) {
htmlf("<span class='age-mins'>%.0f min.</span>",
secs * 1.0 / TM_MIN);
return;
}
if (secs < TM_DAY * 2) {
htmlf("<span class='age-hours'>%.0f hours</span>",
secs * 1.0 / TM_HOUR);
return;
}
if (secs < TM_WEEK * 2) {
htmlf("<span class='age-days'>%.0f days</span>",
secs * 1.0 / TM_DAY);
return;
}
if (secs < TM_MONTH * 2) {
htmlf("<span class='age-weeks'>%.0f weeks</span>",
secs * 1.0 / TM_WEEK);
return;
}
if (secs < TM_YEAR * 2) {
htmlf("<span class='age-months'>%.0f months</span>",
secs * 1.0 / TM_MONTH);
return;
}
htmlf("<span class='age-years'>%.0f years</span>",
secs * 1.0 / TM_YEAR);
}
void cgit_print_http_headers(struct cgit_context *ctx)
{
if (ctx->page.mimetype && ctx->page.charset)
htmlf("Content-Type: %s; charset=%s\n", ctx->page.mimetype,
ctx->page.charset);
else if (ctx->page.mimetype)
htmlf("Content-Type: %s\n", ctx->page.mimetype);
if (ctx->page.size)
htmlf("Content-Length: %ld\n", ctx->page.size);
if (ctx->page.filename)
htmlf("Content-Disposition: inline; filename=\"%s\"\n",
ctx->page.filename);
htmlf("Last-Modified: %s\n", http_date(ctx->page.modified));
htmlf("Expires: %s\n", http_date(ctx->page.expires));
html("\n");
}
void cgit_print_docstart(struct cgit_context *ctx)
{
char *host = cgit_hosturl();
html(cgit_doctype);
html("<html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en' lang='en'>\n");
html("<head>\n");
html("<title>");
html_txt(ctx->page.title);
html("</title>\n");
htmlf("<meta name='generator' content='cgit %s'/>\n", cgit_version);
if (ctx->cfg.robots && *ctx->cfg.robots)
htmlf("<meta name='robots' content='%s'/>\n", ctx->cfg.robots);
html("<link rel='stylesheet' type='text/css' href='");
html_attr(ctx->cfg.css);
html("'/>\n");
if (ctx->cfg.favicon) {
html("<link rel='shortcut icon' href='");
html_attr(ctx->cfg.favicon);
html("'/>\n");
}
if (host && ctx->repo) {
html("<link rel='alternate' title='Atom feed' href='http://");
html_attr(cgit_hosturl());
html_attr(cgit_fileurl(ctx->repo->url, "atom", ctx->qry.path,
fmt("h=%s", ctx->qry.head)));
html("' type='application/atom+xml'/>");
}
html("</head>\n");
html("<body>\n");
}
void cgit_print_docend()
{
html("</div>");
if (ctx.cfg.footer)
html_include(ctx.cfg.footer);
else {
htmlf("<div class='footer'>generated by cgit %s at ",
cgit_version);
cgit_print_date(time(NULL), FMT_LONGDATE, ctx.cfg.local_time);
html("</div>\n");
}
html("</body>\n</html>\n");
}
int print_branch_option(const char *refname, const unsigned char *sha1,
int flags, void *cb_data)
{
char *name = (char *)refname;
html_option(name, name, ctx.qry.head);
return 0;
}
int print_archive_ref(const char *refname, const unsigned char *sha1,
int flags, void *cb_data)
{
struct tag *tag;
struct taginfo *info;
struct object *obj;
char buf[256], *url;
unsigned char fileid[20];
int *header = (int *)cb_data;
if (prefixcmp(refname, "refs/archives"))
return 0;
strncpy(buf, refname+14, sizeof(buf));
obj = parse_object(sha1);
if (!obj)
return 1;
if (obj->type == OBJ_TAG) {
tag = lookup_tag(sha1);
if (!tag || parse_tag(tag) || !(info = cgit_parse_tag(tag)))
return 0;
hashcpy(fileid, tag->tagged->sha1);
} else if (obj->type != OBJ_BLOB) {
return 0;
} else {
hashcpy(fileid, sha1);
}
if (!*header) {
html("<h1>download</h1>\n");
*header = 1;
}
url = cgit_pageurl(ctx.qry.repo, "blob",
fmt("id=%s&amp;path=%s", sha1_to_hex(fileid),
buf));
html_link_open(url, NULL, "menu");
html_txt(strlpart(buf, 20));
html_link_close();
return 0;
}
void add_hidden_formfields(int incl_head, int incl_search, char *page)
{
char *url;
if (!ctx.cfg.virtual_root) {
url = fmt("%s/%s", ctx.qry.repo, page);
if (ctx.qry.path)
url = fmt("%s/%s", url, ctx.qry.path);
html_hidden("url", url);
}
if (incl_head && ctx.qry.head && ctx.repo->defbranch &&
strcmp(ctx.qry.head, ctx.repo->defbranch))
html_hidden("h", ctx.qry.head);
if (ctx.qry.sha1)
html_hidden("id", ctx.qry.sha1);
if (ctx.qry.sha2)
html_hidden("id2", ctx.qry.sha2);
if (incl_search) {
if (ctx.qry.grep)
html_hidden("qt", ctx.qry.grep);
if (ctx.qry.search)
html_hidden("q", ctx.qry.search);
}
}
const char *fallback_cmd = "repolist";
char *hc(struct cgit_cmd *cmd, const char *page)
{
return (strcmp(cmd ? cmd->name : fallback_cmd, page) ? NULL : "active");
}
void cgit_print_pageheader(struct cgit_context *ctx)
{
struct cgit_cmd *cmd = cgit_get_cmd(ctx);
if (!cmd && ctx->repo)
fallback_cmd = "summary";
html("<table id='header'>\n");
html("<tr>\n");
html("<td class='logo' rowspan='2'><a href='");
if (ctx->cfg.logo_link)
html_attr(ctx->cfg.logo_link);
else
html_attr(cgit_rooturl());
html("'><img src='");
html_attr(ctx->cfg.logo);
html("' alt='cgit logo'/></a></td>\n");
html("<td class='main'>");
if (ctx->repo) {
cgit_index_link("index", NULL, NULL, NULL, 0);
html(" : ");
cgit_summary_link(ctx->repo->name, ctx->repo->name, NULL, NULL);
html("</td><td class='form'>");
html("<form method='get' action=''>\n");
add_hidden_formfields(0, 1, ctx->qry.page);
html("<select name='h' onchange='this.form.submit();'>\n");
for_each_branch_ref(print_branch_option, ctx->qry.head);
html("</select> ");
html("<input type='submit' name='' value='switch'/>");
html("</form>");
} else
html_txt(ctx->cfg.root_title);
html("</td></tr>\n");
html("<tr><td class='sub'>");
if (ctx->repo) {
html_txt(ctx->repo->desc);
html("</td><td class='sub right'>");
html_txt(ctx->repo->owner);
} else {
if (ctx->cfg.root_desc)
html_txt(ctx->cfg.root_desc);
else if (ctx->cfg.index_info)
html_include(ctx->cfg.index_info);
}
html("</td></tr></table>\n");
html("<table class='tabs'><tr><td>\n");
if (ctx->repo) {
cgit_summary_link("summary", NULL, hc(cmd, "summary"),
ctx->qry.head);
cgit_refs_link("refs", NULL, hc(cmd, "refs"), ctx->qry.head,
ctx->qry.sha1, NULL);
cgit_log_link("log", NULL, hc(cmd, "log"), ctx->qry.head,
NULL, NULL, 0, NULL, NULL);
cgit_tree_link("tree", NULL, hc(cmd, "tree"), ctx->qry.head,
ctx->qry.sha1, NULL);
cgit_commit_link("commit", NULL, hc(cmd, "commit"),
ctx->qry.head, ctx->qry.sha1);
cgit_diff_link("diff", NULL, hc(cmd, "diff"), ctx->qry.head,
ctx->qry.sha1, ctx->qry.sha2, NULL);
if (ctx->repo->readme)
reporevlink("about", "about", NULL,
hc(cmd, "about"), ctx->qry.head, NULL,
NULL);
html("</td><td class='form'>");
html("<form class='right' method='get' action='");
if (ctx->cfg.virtual_root)
html_url_path(cgit_fileurl(ctx->qry.repo, "log",
ctx->qry.path, NULL));
html("'>\n");
add_hidden_formfields(1, 0, "log");
html("<select name='qt'>\n");
html_option("grep", "log msg", ctx->qry.grep);
html_option("author", "author", ctx->qry.grep);
html_option("committer", "committer", ctx->qry.grep);
html("</select>\n");
html("<input class='txt' type='text' size='10' name='q' value='");
html_attr(ctx->qry.search);
html("'/>\n");
html("<input type='submit' value='search'/>\n");
html("</form>\n");
} else {
site_link(NULL, "index", NULL, hc(cmd, "repolist"), NULL, 0);
if (ctx->cfg.root_readme)
site_link("about", "about", NULL, hc(cmd, "about"),
NULL, 0);
html("</td><td class='form'>");
html("<form method='get' action='");
html_attr(cgit_rooturl());
html("'>\n");
html("<input type='text' name='q' size='10' value='");
html_attr(ctx->qry.search);
html("'/>\n");
html("<input type='submit' value='search'/>\n");
html("</form>");
}
html("</td></tr></table>\n");
html("<div class='content'>");
}
void cgit_print_filemode(unsigned short mode)
{
if (S_ISDIR(mode))
html("d");
else if (S_ISLNK(mode))
html("l");
else if (S_ISGITLINK(mode))
html("m");
else
html("-");
html_fileperm(mode >> 6);
html_fileperm(mode >> 3);
html_fileperm(mode);
}
void cgit_print_snapshot_links(const char *repo, const char *head,
const char *hex, int snapshots)
{
const struct cgit_snapshot_format* f;
char *filename;
for (f = cgit_snapshot_formats; f->suffix; f++) {
if (!(snapshots & f->bit))
continue;
filename = fmt("%s-%s%s", cgit_repobasename(repo), hex,
f->suffix);
cgit_snapshot_link(filename, NULL, NULL, (char *)head,
(char *)hex, filename);
html("<br/>");
}
}
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