ui-plain.c - pub/scm/linux/kernel/git/zx2c4/cgit - Git at Google

 /* 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 <stdio.h>
 #include "cgit.h"
 #include "html.h"
 #include "ui-shared.h"

 int match_baselen;
 int match;

 static char *get_mimetype_from_file(const char *filename, const char *ext)
 {
 	static const char *delimiters;
 	char *result;
 	FILE *fd;
 	char line[1024];
 	char *mimetype;
 	char *token;

 	if (!filename)
 		return NULL;

 	fd = fopen(filename, "r");
 	if (!fd)
 		return NULL;

 	delimiters = " \t\r\n";
 	result = NULL;

 	/* loop over all lines in the file */
 	while (!result && fgets(line, sizeof(line), fd)) {
 		mimetype = strtok(line, delimiters);

 		/* skip empty lines and comment lines */
 		if (!mimetype || (mimetype[0] == '#'))
 			continue;

 		/* loop over all extensions of mimetype */
 		while ((token = strtok(NULL, delimiters))) {
 			if (!strcasecmp(ext, token)) {
 				result = xstrdup(mimetype);
 				break;
 			}
 		}
 	}
 	fclose(fd);

 	return result;
 }

 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;
 	int freemime;

 	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, '.');
 	freemime = 0;
 	if (ext && *(++ext)) {
 		mime = string_list_lookup(&ctx.cfg.mimetypes, ext);
 		if (mime) {
 			ctx.page.mimetype = (char *)mime->util;
 		} else {
 			ctx.page.mimetype = get_mimetype_from_file(ctx.cfg.mimetype_file, ext);
 			if (ctx.page.mimetype)
 				freemime = 1;
 		}
 	}
 	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;
 	if (freemime)
 		free(ctx.page.mimetype);
 }

 static char *buildpath(const char *base, int baselen, const char *path)
 {
 	if (path[0])
 		return fmt("%.*s%s/", baselen, base, path);
 	else
 		return fmt("%.*s/", baselen, base);
 }

 static void print_dir(const unsigned char *sha1, const char *base,
 		      int baselen, const char *path)
 {
 	char *fullpath, *slash;
 	size_t len;

 	fullpath = buildpath(base, baselen, path);
 	slash = (fullpath[0] == '/' ? "" : "/");
 	ctx.page.etag = sha1_to_hex(sha1);
 	cgit_print_http_headers(&ctx);
 	htmlf("<html><head><title>%s", slash);
 	html_txt(fullpath);
 	htmlf("</title></head>\n<body>\n<h2>%s", slash);
 	html_txt(fullpath);
 	html("</h2>\n<ul>\n");
 	len = strlen(fullpath);
 	if (len > 1) {
 		fullpath[len - 1] = 0;
 		slash = strrchr(fullpath, '/');
 		if (slash)
 			*(slash + 1) = 0;
 		else
 			fullpath = NULL;
 		html("<li>");
 		cgit_plain_link("../", NULL, NULL, ctx.qry.head, ctx.qry.sha1,
 				fullpath);
 		html("</li>\n");
 	}
 	match = 2;
 }

 static void print_dir_entry(const unsigned char *sha1, const char *base,
 			    int baselen, const char *path, unsigned mode)
 {
 	char *fullpath;

 	fullpath = buildpath(base, baselen, path);
 	if (!S_ISDIR(mode) && !S_ISGITLINK(mode))
 		fullpath[strlen(fullpath) - 1] = 0;
 	html("  <li>");
 	if (S_ISGITLINK(mode)) {
 		cgit_submodule_link(NULL, fullpath, sha1_to_hex(sha1));
 	} else
 		cgit_plain_link(path, NULL, NULL, ctx.qry.head, ctx.qry.sha1,
 				fullpath);
 	html("</li>\n");
 	match = 2;
 }

 static void print_dir_tail(void)
 {
 	html(" </ul>\n</body></html>\n");
 }

 static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
 		     const char *pathname, unsigned mode, int stage,
 		     void *cbdata)
 {
 	if (baselen == match_baselen) {
 		if (S_ISREG(mode))
 			print_object(sha1, pathname);
 		else if (S_ISDIR(mode)) {
 			print_dir(sha1, base, baselen, pathname);
 			return READ_TREE_RECURSIVE;
 		}
 	}
 	else if (baselen > match_baselen)
 		print_dir_entry(sha1, base, baselen, pathname, mode);
 	else if (S_ISDIR(mode))
 		return READ_TREE_RECURSIVE;

 	return 0;
 }

 static int basedir_len(const char *path)
 {
 	char *p = strrchr(path, '/');
 	if (p)
 		return p - path + 1;
 	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;

 	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;
 	}
 	if (!paths[0]) {
 		paths[0] = "";
 		match_baselen = -1;
 		print_dir(commit->tree->object.sha1, "", 0, "");
 	}
 	else
 		match_baselen = basedir_len(paths[0]);
 	read_tree_recursive(commit->tree, "", 0, 0, paths, walk_tree, NULL);
 	if (!match)
 		html_status(404, "Not found", 0);
 	else if (match == 2)
 		print_dir_tail();
 }
	/* 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 <stdio.h>
	#include "cgit.h"
	#include "html.h"
	#include "ui-shared.h"

	int match_baselen;
	int match;

	static char get_mimetype_from_file(const char filename, const char *ext)
	{
	static const char *delimiters;
	char *result;
	FILE *fd;
	char line[1024];
	char *mimetype;
	char *token;

	if (!filename)
	return NULL;

	fd = fopen(filename, "r");
	if (!fd)
	return NULL;

	delimiters = " \t\r\n";
	result = NULL;

	/* loop over all lines in the file */
	while (!result && fgets(line, sizeof(line), fd)) {
	mimetype = strtok(line, delimiters);

	/* skip empty lines and comment lines */
	if (!mimetype \|\| (mimetype[0] == '#'))
	continue;

	/* loop over all extensions of mimetype */
	while ((token = strtok(NULL, delimiters))) {
	if (!strcasecmp(ext, token)) {
	result = xstrdup(mimetype);
	break;
	}
	}
	}
	fclose(fd);

	return result;
	}

	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;
	int freemime;

	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, '.');
	freemime = 0;
	if (ext && *(++ext)) {
	mime = string_list_lookup(&ctx.cfg.mimetypes, ext);
	if (mime) {
	ctx.page.mimetype = (char *)mime->util;
	} else {
	ctx.page.mimetype = get_mimetype_from_file(ctx.cfg.mimetype_file, ext);
	if (ctx.page.mimetype)
	freemime = 1;
	}
	}
	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;
	if (freemime)
	free(ctx.page.mimetype);
	}

	static char buildpath(const char base, int baselen, const char *path)
	{
	if (path[0])
	return fmt("%.*s%s/", baselen, base, path);
	else
	return fmt("%.*s/", baselen, base);
	}

	static void print_dir(const unsigned char sha1, const char base,
	int baselen, const char *path)
	{
	char fullpath, slash;
	size_t len;

	fullpath = buildpath(base, baselen, path);
	slash = (fullpath[0] == '/' ? "" : "/");
	ctx.page.etag = sha1_to_hex(sha1);
	cgit_print_http_headers(&ctx);
	htmlf("<html><head><title>%s", slash);
	html_txt(fullpath);
	htmlf("</title></head>\n<body>\n<h2>%s", slash);
	html_txt(fullpath);
	html("</h2>\n<ul>\n");
	len = strlen(fullpath);
	if (len > 1) {
	fullpath[len - 1] = 0;
	slash = strrchr(fullpath, '/');
	if (slash)
	*(slash + 1) = 0;
	else
	fullpath = NULL;
	html("<li>");
	cgit_plain_link("../", NULL, NULL, ctx.qry.head, ctx.qry.sha1,
	fullpath);
	html("</li>\n");
	}
	match = 2;
	}

	static void print_dir_entry(const unsigned char sha1, const char base,
	int baselen, const char *path, unsigned mode)
	{
	char *fullpath;

	fullpath = buildpath(base, baselen, path);
	if (!S_ISDIR(mode) && !S_ISGITLINK(mode))
	fullpath[strlen(fullpath) - 1] = 0;
	html(" <li>");
	if (S_ISGITLINK(mode)) {
	cgit_submodule_link(NULL, fullpath, sha1_to_hex(sha1));
	} else
	cgit_plain_link(path, NULL, NULL, ctx.qry.head, ctx.qry.sha1,
	fullpath);
	html("</li>\n");
	match = 2;
	}

	static void print_dir_tail(void)
	{
	html(" </ul>\n</body></html>\n");
	}

	static int walk_tree(const unsigned char sha1, const char base, int baselen,
	const char *pathname, unsigned mode, int stage,
	void *cbdata)
	{
	if (baselen == match_baselen) {
	if (S_ISREG(mode))
	print_object(sha1, pathname);
	else if (S_ISDIR(mode)) {
	print_dir(sha1, base, baselen, pathname);
	return READ_TREE_RECURSIVE;
	}
	}
	else if (baselen > match_baselen)
	print_dir_entry(sha1, base, baselen, pathname, mode);
	else if (S_ISDIR(mode))
	return READ_TREE_RECURSIVE;

	return 0;
	}

	static int basedir_len(const char *path)
	{
	char *p = strrchr(path, '/');
	if (p)
	return p - path + 1;
	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;

	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;
	}
	if (!paths[0]) {
	paths[0] = "";
	match_baselen = -1;
	print_dir(commit->tree->object.sha1, "", 0, "");
	}
	else
	match_baselen = basedir_len(paths[0]);
	read_tree_recursive(commit->tree, "", 0, 0, paths, walk_tree, NULL);
	if (!match)
	html_status(404, "Not found", 0);
	else if (match == 2)
	print_dir_tail();
	}