/* ui-snapshot.c: generate snapshot of a commit
*
- * Copyright (C) 2006 Lars Hjemli
+ * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
*/
#include "cgit.h"
+#include "ui-snapshot.h"
#include "html.h"
#include "ui-shared.h"
-static int write_compressed_tar_archive(struct archiver_args *args,const char *filter)
+static int write_archive_type(const char *format, const char *hex, const char *prefix)
+{
+ struct argv_array argv = ARGV_ARRAY_INIT;
+ const char **nargv;
+ int result;
+ argv_array_push(&argv, "snapshot");
+ argv_array_push(&argv, format);
+ if (prefix) {
+ struct strbuf buf = STRBUF_INIT;
+ strbuf_addstr(&buf, prefix);
+ strbuf_addch(&buf, '/');
+ argv_array_push(&argv, "--prefix");
+ argv_array_push(&argv, buf.buf);
+ strbuf_release(&buf);
+ }
+ argv_array_push(&argv, hex);
+ /*
+ * Now we need to copy the pointers to arguments into a new
+ * structure because write_archive will rearrange its arguments
+ * which may result in duplicated/missing entries causing leaks
+ * or double-frees in argv_array_clear.
+ */
+ nargv = xmalloc(sizeof(char *) * (argv.argc + 1));
+ /* argv_array guarantees a trailing NULL entry. */
+ memcpy(nargv, argv.argv, sizeof(char *) * (argv.argc + 1));
+
+ result = write_archive(argv.argc, nargv, NULL, 1, NULL, 0);
+ argv_array_clear(&argv);
+ free(nargv);
+ return result;
+}
+
+static int write_tar_archive(const char *hex, const char *prefix)
+{
+ return write_archive_type("--format=tar", hex, prefix);
+}
+
+static int write_zip_archive(const char *hex, const char *prefix)
+{
+ return write_archive_type("--format=zip", hex, prefix);
+}
+
+static int write_compressed_tar_archive(const char *hex,
+ const char *prefix,
+ char *filter_argv[])
{
int rv;
- struct cgit_filter f;
-
- f.cmd = xstrdup(filter);
- f.argv = malloc(2 * sizeof(char *));
- f.argv[0] = f.cmd;
- f.argv[1] = NULL;
- cgit_open_filter(&f, NULL);
- rv = write_tar_archive(args);
- cgit_close_filter(&f);
+ struct cgit_exec_filter f;
+ cgit_exec_filter_init(&f, filter_argv[0], filter_argv);
+
+ cgit_open_filter(&f.base);
+ rv = write_tar_archive(hex, prefix);
+ cgit_close_filter(&f.base);
return rv;
}
-static int write_tar_gzip_archive(struct archiver_args *args)
+static int write_tar_gzip_archive(const char *hex, const char *prefix)
{
- return write_compressed_tar_archive(args,"gzip");
+ char *argv[] = { "gzip", "-n", NULL };
+ return write_compressed_tar_archive(hex, prefix, argv);
}
-static int write_tar_bzip2_archive(struct archiver_args *args)
+static int write_tar_bzip2_archive(const char *hex, const char *prefix)
{
- return write_compressed_tar_archive(args,"bzip2");
+ char *argv[] = { "bzip2", NULL };
+ return write_compressed_tar_archive(hex, prefix, argv);
}
-static int write_tar_xz_archive(struct archiver_args *args)
+static int write_tar_xz_archive(const char *hex, const char *prefix)
{
- return write_compressed_tar_archive(args,"xz");
+ char *argv[] = { "xz", NULL };
+ return write_compressed_tar_archive(hex, prefix, argv);
}
const struct cgit_snapshot_format cgit_snapshot_formats[] = {
{ ".tar.bz2", "application/x-bzip2", write_tar_bzip2_archive, 0x04 },
{ ".tar", "application/x-tar", write_tar_archive, 0x08 },
{ ".tar.xz", "application/x-xz", write_tar_xz_archive, 0x10 },
- {}
+ { NULL }
};
static const struct cgit_snapshot_format *get_format(const char *filename)
{
const struct cgit_snapshot_format *fmt;
- int fl, sl;
-
- fl = strlen(filename);
- for(fmt = cgit_snapshot_formats; fmt->suffix; fmt++) {
- sl = strlen(fmt->suffix);
- if (sl >= fl)
- continue;
- if (!strcmp(fmt->suffix, filename + fl - sl))
+
+ for (fmt = cgit_snapshot_formats; fmt->suffix; fmt++) {
+ if (ends_with(filename, fmt->suffix))
return fmt;
}
return NULL;
const char *hex, const char *prefix,
const char *filename)
{
- struct archiver_args args;
- struct commit *commit;
unsigned char sha1[20];
- if(get_sha1(hex, sha1)) {
- cgit_print_error(fmt("Bad object id: %s", hex));
+ if (get_sha1(hex, sha1)) {
+ cgit_print_error_page(404, "Not found",
+ "Bad object id: %s", hex);
return 1;
}
- commit = lookup_commit_reference(sha1);
- if(!commit) {
- cgit_print_error(fmt("Not a commit reference: %s", hex));
+ if (!lookup_commit_reference(sha1)) {
+ cgit_print_error_page(400, "Bad request",
+ "Not a commit reference: %s", hex);
return 1;
}
- memset(&args, 0, sizeof(args));
- if (prefix) {
- args.base = fmt("%s/", prefix);
- args.baselen = strlen(prefix) + 1;
- } else {
- args.base = "";
- args.baselen = 0;
- }
- args.tree = commit->tree;
- args.time = commit->date;
- args.compression_level = Z_DEFAULT_COMPRESSION;
+ ctx.page.etag = sha1_to_hex(sha1);
ctx.page.mimetype = xstrdup(format->mimetype);
ctx.page.filename = xstrdup(filename);
- cgit_print_http_headers(&ctx);
- format->write_func(&args);
+ cgit_print_http_headers();
+ format->write_func(hex, prefix);
return 0;
}
* repo_basename(), we strip the basename and any following '-' and '_'
* characters ("cgit-0.7.2" -> "0.7.2") and check the resulting name once
* more. If this still isn't a valid commit object name, we check if pre-
- * pending a 'v' to the remaining snapshot name ("0.7.2" -> "v0.7.2") gives
- * us something valid.
+ * pending a 'v' or a 'V' to the remaining snapshot name ("0.7.2" ->
+ * "v0.7.2") gives us something valid.
*/
static const char *get_ref_from_filename(const char *url, const char *filename,
const struct cgit_snapshot_format *format)
{
const char *reponame;
unsigned char sha1[20];
- char *snapshot;
+ struct strbuf snapshot = STRBUF_INIT;
+ int result = 1;
- snapshot = xstrdup(filename);
- snapshot[strlen(snapshot) - strlen(format->suffix)] = '\0';
+ strbuf_addstr(&snapshot, filename);
+ strbuf_setlen(&snapshot, snapshot.len - strlen(format->suffix));
- if (get_sha1(snapshot, sha1) == 0)
- return snapshot;
+ if (get_sha1(snapshot.buf, sha1) == 0)
+ goto out;
reponame = cgit_repobasename(url);
- if (prefixcmp(snapshot, reponame) == 0) {
- snapshot += strlen(reponame);
- while (snapshot && (*snapshot == '-' || *snapshot == '_'))
- snapshot++;
+ if (starts_with(snapshot.buf, reponame)) {
+ const char *new_start = snapshot.buf;
+ new_start += strlen(reponame);
+ while (new_start && (*new_start == '-' || *new_start == '_'))
+ new_start++;
+ strbuf_splice(&snapshot, 0, new_start - snapshot.buf, "", 0);
}
- if (get_sha1(snapshot, sha1) == 0)
- return snapshot;
+ if (get_sha1(snapshot.buf, sha1) == 0)
+ goto out;
- snapshot = fmt("v%s", snapshot);
- if (get_sha1(snapshot, sha1) == 0)
- return snapshot;
+ strbuf_insert(&snapshot, 0, "v", 1);
+ if (get_sha1(snapshot.buf, sha1) == 0)
+ goto out;
- return NULL;
-}
+ strbuf_splice(&snapshot, 0, 1, "V", 1);
+ if (get_sha1(snapshot.buf, sha1) == 0)
+ goto out;
-void show_error(char *msg)
-{
- ctx.page.mimetype = "text/html";
- cgit_print_http_headers(&ctx);
- cgit_print_docstart(&ctx);
- cgit_print_pageheader(&ctx);
- cgit_print_error(msg);
- cgit_print_docend();
+ result = 0;
+ strbuf_release(&snapshot);
+
+out:
+ return result ? strbuf_detach(&snapshot, NULL) : NULL;
}
void cgit_print_snapshot(const char *head, const char *hex,
- const char *filename, int snapshots, int dwim)
+ const char *filename, int dwim)
{
const struct cgit_snapshot_format* f;
char *prefix = NULL;
if (!filename) {
- show_error("No snapshot name specified");
+ cgit_print_error_page(400, "Bad request",
+ "No snapshot name specified");
return;
}
f = get_format(filename);
if (!f) {
- show_error(xstrdup(fmt("Unsupported snapshot format: %s",
- filename)));
+ cgit_print_error_page(400, "Bad request",
+ "Unsupported snapshot format: %s", filename);
return;
}
if (!hex && dwim) {
hex = get_ref_from_filename(ctx.repo->url, filename, f);
if (hex == NULL) {
- html_status(404, "Not found", 0);
+ cgit_print_error_page(404, "Not found", "Not found");
return;
}
prefix = xstrdup(filename);
git.ckatri.com / cgit.git / blobdiff