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Add support for ETag in 'plain' view
[ps-cgit] / ui-plain.c
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 "cgit.h"
10 #include "html.h"
11 #include "ui-shared.h"
12
13 char *curr_rev;
14 char *match_path;
15 int match;
16
17 static void print_object(const unsigned char *sha1, const char *path)
18 {
19         enum object_type type;
20         char *buf;
21         unsigned long size;
22
23         type = sha1_object_info(sha1, &size);
24         if (type == OBJ_BAD) {
25                 html_status(404, "Not found", 0);
26                 return;
27         }
28
29         buf = read_sha1_file(sha1, &type, &size);
30         if (!buf) {
31                 html_status(404, "Not found", 0);
32                 return;
33         }
34         ctx.page.mimetype = "text/plain";
35         ctx.page.filename = fmt("%s", path);
36         ctx.page.size = size;
37         ctx.page.etag = sha1_to_hex(sha1);
38         cgit_print_http_headers(&ctx);
39         html_raw(buf, size);
40         match = 1;
41 }
42
43 static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
44                      const char *pathname, unsigned mode, int stage,
45                      void *cbdata)
46 {
47         if (S_ISDIR(mode))
48                 return READ_TREE_RECURSIVE;
49
50         if (S_ISREG(mode))
51                 print_object(sha1, pathname);
52
53         return 0;
54 }
55
56 void cgit_print_plain(struct cgit_context *ctx)
57 {
58         const char *rev = ctx->qry.sha1;
59         unsigned char sha1[20];
60         struct commit *commit;
61         const char *paths[] = {ctx->qry.path, NULL};
62
63         if (!rev)
64                 rev = ctx->qry.head;
65
66         curr_rev = xstrdup(rev);
67         if (get_sha1(rev, sha1)) {
68                 html_status(404, "Not found", 0);
69                 return;
70         }
71         commit = lookup_commit_reference(sha1);
72         if (!commit || parse_commit(commit)) {
73                 html_status(404, "Not found", 0);
74                 return;
75         }
76         match_path = ctx->qry.path;
77         read_tree_recursive(commit->tree, NULL, 0, 0, paths, walk_tree, NULL);
78         if (!match)
79                 html_status(404, "Not found", 0);
80 }