/* ui-plain.c: functions for output of plain blobs by path * * 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 <stdio.h>#include "cgit.h"#include "ui-plain.h"#include "html.h"#include "ui-shared.h" struct walk_tree_context {	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 int 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 0;	} 	buf = read_sha1_file(sha1, &type, &size);	if (!buf) {		html_status(404, "Not found", 0);		return 0;	}	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;			ctx.page.charset = NULL;		} else {			ctx.page.mimetype = get_mimetype_from_file(ctx.cfg.mimetype_file, ext);			if (ctx.page.mimetype) {				freemime = 1;				ctx.page.charset = NULL;			}		}	}	if (!ctx.page.mimetype) {		if (buffer_is_binary(buf, size)) {			ctx.page.mimetype = "application/octet-stream";			ctx.page.charset = NULL;		} else {			ctx.page.mimetype = "text/plain";		}	}	ctx.page.filename = path;	ctx.page.size = size;	ctx.page.etag = sha1_to_hex(sha1);	cgit_print_http_headers(&ctx);	html_raw(buf, size);	/* If we allocated this, then casting away const is safe. */	if (freemime)		free((char*) ctx.page.mimetype);	return 1;} static char *buildpath(const char *base, int baselen, const char *path){	if (path[0])		return fmtalloc("%.*s%s/", baselen, base, path);	else		return fmtalloc("%.*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");	}	free(fullpath);} 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");	free(fullpath);} 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){	struct walk_tree_context *walk_tree_ctx = cbdata; 	if (baselen == walk_tree_ctx->match_baselen) {		if (S_ISREG(mode)) {			if (print_object(sha1, pathname))				walk_tree_ctx->match = 1;		} else if (S_ISDIR(mode)) {			print_dir(sha1, base, baselen, pathname);			walk_tree_ctx->match = 2;			return READ_TREE_RECURSIVE;		}	} else if (baselen > walk_tree_ctx->match_baselen) {		print_dir_entry(sha1, base, baselen, pathname, mode);		walk_tree_ctx->match = 2;	} 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;	struct pathspec_item path_items = {		.match = ctx->qry.path,		.len = ctx->qry.path ? strlen(ctx->qry.path) : 0	};	struct pathspec paths = {		.nr = 1,		.items = &path_items	};	struct walk_tree_context walk_tree_ctx = {		.match = 0	}; 	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 (!path_items.match) {		path_items.match = "";		walk_tree_ctx.match_baselen = -1;		print_dir(commit->tree->object.sha1, "", 0, "");		walk_tree_ctx.match = 2;	}	else		walk_tree_ctx.match_baselen = basedir_len(path_items.match);	read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);	if (!walk_tree_ctx.match)		html_status(404, "Not found", 0);	else if (walk_tree_ctx.match == 2)		print_dir_tail();}