ui-plain.c (view raw)
1/* ui-plain.c: functions for output of plain blobs by path
2 *
3 * Copyright (C) 2008 Lars Hjemli
4 *
5 * Licensed under GNU General Public License v2
6 * (see COPYING for full license text)
7 */
8
9#include <stdio.h>
10#include "cgit.h"
11#include "ui-plain.h"
12#include "html.h"
13#include "ui-shared.h"
14
15struct walk_tree_context {
16 int match_baselen;
17 int match;
18};
19
20static char *get_mimetype_from_file(const char *filename, const char *ext)
21{
22 static const char *delimiters;
23 char *result;
24 FILE *fd;
25 char line[1024];
26 char *mimetype;
27 char *token;
28
29 if (!filename)
30 return NULL;
31
32 fd = fopen(filename, "r");
33 if (!fd)
34 return NULL;
35
36 delimiters = " \t\r\n";
37 result = NULL;
38
39 /* loop over all lines in the file */
40 while (!result && fgets(line, sizeof(line), fd)) {
41 mimetype = strtok(line, delimiters);
42
43 /* skip empty lines and comment lines */
44 if (!mimetype || (mimetype[0] == '#'))
45 continue;
46
47 /* loop over all extensions of mimetype */
48 while ((token = strtok(NULL, delimiters))) {
49 if (!strcasecmp(ext, token)) {
50 result = xstrdup(mimetype);
51 break;
52 }
53 }
54 }
55 fclose(fd);
56
57 return result;
58}
59
60static int print_object(const unsigned char *sha1, const char *path)
61{
62 enum object_type type;
63 char *buf, *ext;
64 unsigned long size;
65 struct string_list_item *mime;
66 int freemime;
67
68 type = sha1_object_info(sha1, &size);
69 if (type == OBJ_BAD) {
70 html_status(404, "Not found", 0);
71 return 0;
72 }
73
74 buf = read_sha1_file(sha1, &type, &size);
75 if (!buf) {
76 html_status(404, "Not found", 0);
77 return 0;
78 }
79 ctx.page.mimetype = NULL;
80 ext = strrchr(path, '.');
81 freemime = 0;
82 if (ext && *(++ext)) {
83 mime = string_list_lookup(&ctx.cfg.mimetypes, ext);
84 if (mime) {
85 ctx.page.mimetype = (char *)mime->util;
86 } else {
87 ctx.page.mimetype = get_mimetype_from_file(ctx.cfg.mimetype_file, ext);
88 if (ctx.page.mimetype)
89 freemime = 1;
90 }
91 }
92 if (!ctx.page.mimetype) {
93 if (buffer_is_binary(buf, size))
94 ctx.page.mimetype = "application/octet-stream";
95 else
96 ctx.page.mimetype = "text/plain";
97 }
98 ctx.page.filename = fmt("%s", path);
99 ctx.page.size = size;
100 ctx.page.etag = sha1_to_hex(sha1);
101 cgit_print_http_headers(&ctx);
102 html_raw(buf, size);
103 if (freemime)
104 free(ctx.page.mimetype);
105 return 1;
106}
107
108static char *buildpath(const char *base, int baselen, const char *path)
109{
110 if (path[0])
111 return fmt("%.*s%s/", baselen, base, path);
112 else
113 return fmt("%.*s/", baselen, base);
114}
115
116static void print_dir(const unsigned char *sha1, const char *base,
117 int baselen, const char *path)
118{
119 char *fullpath, *slash;
120 size_t len;
121
122 fullpath = buildpath(base, baselen, path);
123 slash = (fullpath[0] == '/' ? "" : "/");
124 ctx.page.etag = sha1_to_hex(sha1);
125 cgit_print_http_headers(&ctx);
126 htmlf("<html><head><title>%s", slash);
127 html_txt(fullpath);
128 htmlf("</title></head>\n<body>\n<h2>%s", slash);
129 html_txt(fullpath);
130 html("</h2>\n<ul>\n");
131 len = strlen(fullpath);
132 if (len > 1) {
133 fullpath[len - 1] = 0;
134 slash = strrchr(fullpath, '/');
135 if (slash)
136 *(slash + 1) = 0;
137 else
138 fullpath = NULL;
139 html("<li>");
140 cgit_plain_link("../", NULL, NULL, ctx.qry.head, ctx.qry.sha1,
141 fullpath);
142 html("</li>\n");
143 }
144}
145
146static void print_dir_entry(const unsigned char *sha1, const char *base,
147 int baselen, const char *path, unsigned mode)
148{
149 char *fullpath;
150
151 fullpath = buildpath(base, baselen, path);
152 if (!S_ISDIR(mode) && !S_ISGITLINK(mode))
153 fullpath[strlen(fullpath) - 1] = 0;
154 html(" <li>");
155 if (S_ISGITLINK(mode)) {
156 cgit_submodule_link(NULL, fullpath, sha1_to_hex(sha1));
157 } else
158 cgit_plain_link(path, NULL, NULL, ctx.qry.head, ctx.qry.sha1,
159 fullpath);
160 html("</li>\n");
161}
162
163static void print_dir_tail(void)
164{
165 html(" </ul>\n</body></html>\n");
166}
167
168static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
169 const char *pathname, unsigned mode, int stage,
170 void *cbdata)
171{
172 struct walk_tree_context *walk_tree_ctx = cbdata;
173
174 if (baselen == walk_tree_ctx->match_baselen) {
175 if (S_ISREG(mode)) {
176 if (print_object(sha1, pathname))
177 walk_tree_ctx->match = 1;
178 } else if (S_ISDIR(mode)) {
179 print_dir(sha1, base, baselen, pathname);
180 walk_tree_ctx->match = 2;
181 return READ_TREE_RECURSIVE;
182 }
183 } else if (baselen > walk_tree_ctx->match_baselen) {
184 print_dir_entry(sha1, base, baselen, pathname, mode);
185 walk_tree_ctx->match = 2;
186 } else if (S_ISDIR(mode)) {
187 return READ_TREE_RECURSIVE;
188 }
189
190 return 0;
191}
192
193static int basedir_len(const char *path)
194{
195 char *p = strrchr(path, '/');
196 if (p)
197 return p - path + 1;
198 return 0;
199}
200
201void cgit_print_plain(struct cgit_context *ctx)
202{
203 const char *rev = ctx->qry.sha1;
204 unsigned char sha1[20];
205 struct commit *commit;
206 struct pathspec_item path_items = {
207 .match = ctx->qry.path,
208 .len = ctx->qry.path ? strlen(ctx->qry.path) : 0
209 };
210 struct pathspec paths = {
211 .nr = 1,
212 .items = &path_items
213 };
214 struct walk_tree_context walk_tree_ctx = {
215 .match = 0
216 };
217
218 if (!rev)
219 rev = ctx->qry.head;
220
221 if (get_sha1(rev, sha1)) {
222 html_status(404, "Not found", 0);
223 return;
224 }
225 commit = lookup_commit_reference(sha1);
226 if (!commit || parse_commit(commit)) {
227 html_status(404, "Not found", 0);
228 return;
229 }
230 if (!path_items.match) {
231 path_items.match = "";
232 walk_tree_ctx.match_baselen = -1;
233 print_dir(commit->tree->object.sha1, "", 0, "");
234 walk_tree_ctx.match = 2;
235 }
236 else
237 walk_tree_ctx.match_baselen = basedir_len(path_items.match);
238 read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
239 if (!walk_tree_ctx.match)
240 html_status(404, "Not found", 0);
241 else if (walk_tree_ctx.match == 2)
242 print_dir_tail();
243}