ui-plain.c (view raw)
1/* ui-plain.c: functions for output of plain blobs by path
2 *
3 * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
4 *
5 * Licensed under GNU General Public License v2
6 * (see COPYING for full license text)
7 */
8
9#include "cgit.h"
10#include "ui-plain.h"
11#include "html.h"
12#include "ui-shared.h"
13
14struct walk_tree_context {
15 int match_baselen;
16 int match;
17};
18
19static int print_object(const unsigned char *sha1, const char *path)
20{
21 enum object_type type;
22 char *buf, *mimetype;
23 unsigned long size;
24
25 type = sha1_object_info(sha1, &size);
26 if (type == OBJ_BAD) {
27 cgit_print_error_page(404, "Not found", "Not found");
28 return 0;
29 }
30
31 buf = read_sha1_file(sha1, &type, &size);
32 if (!buf) {
33 cgit_print_error_page(404, "Not found", "Not found");
34 return 0;
35 }
36
37 mimetype = get_mimetype_for_filename(path);
38 ctx.page.mimetype = mimetype;
39
40 if (!ctx.repo->enable_html_serving) {
41 html("X-Content-Type-Options: nosniff\n");
42 html("Content-Security-Policy: default-src 'none'\n");
43 if (mimetype) {
44 /* Built-in white list allows PDF and everything that isn't text/ and application/ */
45 if ((!strncmp(mimetype, "text/", 5) || !strncmp(mimetype, "application/", 12)) && strcmp(mimetype, "application/pdf"))
46 ctx.page.mimetype = NULL;
47 }
48 }
49
50 if (!ctx.page.mimetype) {
51 if (buffer_is_binary(buf, size)) {
52 ctx.page.mimetype = "application/octet-stream";
53 ctx.page.charset = NULL;
54 } else {
55 ctx.page.mimetype = "text/plain";
56 }
57 }
58 ctx.page.filename = path;
59 ctx.page.size = size;
60 ctx.page.etag = sha1_to_hex(sha1);
61 cgit_print_http_headers();
62 html_raw(buf, size);
63 free(mimetype);
64 free(buf);
65 return 1;
66}
67
68static char *buildpath(const char *base, int baselen, const char *path)
69{
70 if (path[0])
71 return fmtalloc("%.*s%s/", baselen, base, path);
72 else
73 return fmtalloc("%.*s/", baselen, base);
74}
75
76static void print_dir(const unsigned char *sha1, const char *base,
77 int baselen, const char *path)
78{
79 char *fullpath, *slash;
80 size_t len;
81
82 fullpath = buildpath(base, baselen, path);
83 slash = (fullpath[0] == '/' ? "" : "/");
84 ctx.page.etag = sha1_to_hex(sha1);
85 cgit_print_http_headers();
86 htmlf("<html><head><title>%s", slash);
87 html_txt(fullpath);
88 htmlf("</title></head>\n<body>\n<h2>%s", slash);
89 html_txt(fullpath);
90 html("</h2>\n<ul>\n");
91 len = strlen(fullpath);
92 if (len > 1) {
93 fullpath[len - 1] = 0;
94 slash = strrchr(fullpath, '/');
95 if (slash)
96 *(slash + 1) = 0;
97 else {
98 free(fullpath);
99 fullpath = NULL;
100 }
101 html("<li>");
102 cgit_plain_link("../", NULL, NULL, ctx.qry.head, ctx.qry.sha1,
103 fullpath);
104 html("</li>\n");
105 }
106 free(fullpath);
107}
108
109static void print_dir_entry(const unsigned char *sha1, const char *base,
110 int baselen, const char *path, unsigned mode)
111{
112 char *fullpath;
113
114 fullpath = buildpath(base, baselen, path);
115 if (!S_ISDIR(mode) && !S_ISGITLINK(mode))
116 fullpath[strlen(fullpath) - 1] = 0;
117 html(" <li>");
118 if (S_ISGITLINK(mode)) {
119 cgit_submodule_link(NULL, fullpath, sha1_to_hex(sha1));
120 } else
121 cgit_plain_link(path, NULL, NULL, ctx.qry.head, ctx.qry.sha1,
122 fullpath);
123 html("</li>\n");
124 free(fullpath);
125}
126
127static void print_dir_tail(void)
128{
129 html(" </ul>\n</body></html>\n");
130}
131
132static int walk_tree(const unsigned char *sha1, struct strbuf *base,
133 const char *pathname, unsigned mode, int stage, void *cbdata)
134{
135 struct walk_tree_context *walk_tree_ctx = cbdata;
136
137 if (base->len == walk_tree_ctx->match_baselen) {
138 if (S_ISREG(mode)) {
139 if (print_object(sha1, pathname))
140 walk_tree_ctx->match = 1;
141 } else if (S_ISDIR(mode)) {
142 print_dir(sha1, base->buf, base->len, pathname);
143 walk_tree_ctx->match = 2;
144 return READ_TREE_RECURSIVE;
145 }
146 } else if (base->len < INT_MAX && (int)base->len > walk_tree_ctx->match_baselen) {
147 print_dir_entry(sha1, base->buf, base->len, pathname, mode);
148 walk_tree_ctx->match = 2;
149 } else if (S_ISDIR(mode)) {
150 return READ_TREE_RECURSIVE;
151 }
152
153 return 0;
154}
155
156static int basedir_len(const char *path)
157{
158 char *p = strrchr(path, '/');
159 if (p)
160 return p - path + 1;
161 return 0;
162}
163
164void cgit_print_plain(void)
165{
166 const char *rev = ctx.qry.sha1;
167 unsigned char sha1[20];
168 struct commit *commit;
169 struct pathspec_item path_items = {
170 .match = ctx.qry.path,
171 .len = ctx.qry.path ? strlen(ctx.qry.path) : 0
172 };
173 struct pathspec paths = {
174 .nr = 1,
175 .items = &path_items
176 };
177 struct walk_tree_context walk_tree_ctx = {
178 .match = 0
179 };
180
181 if (!rev)
182 rev = ctx.qry.head;
183
184 if (get_sha1(rev, sha1)) {
185 cgit_print_error_page(404, "Not found", "Not found");
186 return;
187 }
188 commit = lookup_commit_reference(sha1);
189 if (!commit || parse_commit(commit)) {
190 cgit_print_error_page(404, "Not found", "Not found");
191 return;
192 }
193 if (!path_items.match) {
194 path_items.match = "";
195 walk_tree_ctx.match_baselen = -1;
196 print_dir(commit->tree->object.oid.hash, "", 0, "");
197 walk_tree_ctx.match = 2;
198 }
199 else
200 walk_tree_ctx.match_baselen = basedir_len(path_items.match);
201 read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
202 if (!walk_tree_ctx.match)
203 cgit_print_error_page(404, "Not found", "Not found");
204 else if (walk_tree_ctx.match == 2)
205 print_dir_tail();
206}