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/* ui-plain.c: functions for output of plain blobs by path
 *
 * Copyright (C) 2008 Lars Hjemli
 *
 * Licensed under GNU General Public License v2
 *   (see COPYING for full license text)
 */

#include "cgit.h"
#include "html.h"
#include "ui-shared.h"

char *curr_rev;
char *match_path;
int match;

static void print_object(const unsigned char *sha1, const char *path)
{
	enum object_type type;
	char *buf, *ext;
	unsigned long size;
	struct string_list_item *mime;

	type = sha1_object_info(sha1, &size);
	if (type == OBJ_BAD) {
		html_status(404, "Not found", 0);
		return;
	}

	buf = read_sha1_file(sha1, &type, &size);
	if (!buf) {
		html_status(404, "Not found", 0);
		return;
	}
	ctx.page.mimetype = NULL;
	ext = strrchr(path, '.');
	if (ext && *(++ext)) {
		mime = string_list_lookup(ext, &ctx.cfg.mimetypes);
		if (mime)
			ctx.page.mimetype = (char *)mime->util;
	}
	if (!ctx.page.mimetype) {
		if (buffer_is_binary(buf, size))
			ctx.page.mimetype = "application/octet-stream";
		else
			ctx.page.mimetype = "text/plain";
	}
	ctx.page.filename = fmt("%s", path);
	ctx.page.size = size;
	ctx.page.etag = sha1_to_hex(sha1);
	cgit_print_http_headers(&ctx);
	html_raw(buf, size);
	match = 1;
}

static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
		     const char *pathname, unsigned mode, int stage,
		     void *cbdata)
{
	if (S_ISDIR(mode))
		return READ_TREE_RECURSIVE;

	if (S_ISREG(mode))
		print_object(sha1, pathname);

	return 0;
}

void cgit_print_plain(struct cgit_context *ctx)
{
	const char *rev = ctx->qry.sha1;
	unsigned char sha1[20];
	struct commit *commit;
	const char *paths[] = {ctx->qry.path, NULL};

	if (!rev)
		rev = ctx->qry.head;

	curr_rev = xstrdup(rev);
	if (get_sha1(rev, sha1)) {
		html_status(404, "Not found", 0);
		return;
	}
	commit = lookup_commit_reference(sha1);
	if (!commit || parse_commit(commit)) {
		html_status(404, "Not found", 0);
		return;
	}
	match_path = ctx->qry.path;
	read_tree_recursive(commit->tree, NULL, 0, 0, paths, walk_tree, NULL);
	if (!match)
		html_status(404, "Not found", 0);
}
p2_archive(const char *hex, const char *prefix) { char *argv[] = { "bzip2", NULL }; return write_compressed_tar_archive(hex, prefix, argv); } static int write_tar_xz_archive(const char *hex, const char *prefix) { char *argv[] = { "xz", NULL }; return write_compressed_tar_archive(hex, prefix, argv); } const struct cgit_snapshot_format cgit_snapshot_formats[] = { { ".zip", "application/x-zip", write_zip_archive, 0x01 }, { ".tar.gz", "application/x-gzip", write_tar_gzip_archive, 0x02 }, { ".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; for (fmt = cgit_snapshot_formats; fmt->suffix; fmt++) { if (ends_with(filename, fmt->suffix)) return fmt; } return NULL; } static int make_snapshot(const struct cgit_snapshot_format *format, const char *hex, const char *prefix, const char *filename) { unsigned char sha1[20]; if (get_sha1(hex, sha1)) { cgit_print_error_page(404, "Not found", "Bad object id: %s", hex); return 1; } if (!lookup_commit_reference(sha1)) { cgit_print_error_page(400, "Bad request", "Not a commit reference: %s", hex); return 1; } ctx.page.etag = sha1_to_hex(sha1); ctx.page.mimetype = xstrdup(format->mimetype); ctx.page.filename = xstrdup(filename); cgit_print_http_headers(); format->write_func(hex, prefix); return 0; } /* Try to guess the requested revision from the requested snapshot name. * First the format extension is stripped, e.g. "cgit-0.7.2.tar.gz" become * "cgit-0.7.2". If this is a valid commit object name we've got a winner. * Otherwise, if the snapshot name has a prefix matching the result from * 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' 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]; struct strbuf snapshot = STRBUF_INIT; int result = 1; strbuf_addstr(&snapshot, filename); strbuf_setlen(&snapshot, snapshot.len - strlen(format->suffix)); if (get_sha1(snapshot.buf, sha1) == 0) goto out; reponame = cgit_repobasename(url); 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.buf, sha1) == 0) goto out; strbuf_insert(&snapshot, 0, "v", 1); if (get_sha1(snapshot.buf, sha1) == 0) goto out; strbuf_splice(&snapshot, 0, 1, "V", 1); if (get_sha1(snapshot.buf, sha1) == 0) goto out; 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 dwim) { const struct cgit_snapshot_format* f; char *prefix = NULL; if (!filename) { cgit_print_error_page(400, "Bad request", "No snapshot name specified"); return; } f = get_format(filename); if (!f) { 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) { cgit_print_error_page(404, "Not found", "Not found"); return; } prefix = xstrdup(filename); prefix[strlen(filename) - strlen(f->suffix)] = '\0'; } if (!hex) hex = head; if (!prefix) prefix = xstrdup(cgit_repobasename(ctx.repo->url)); make_snapshot(f, hex, prefix, filename); free(prefix); }