ui-plain.c

   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
  14 struct walk_tree_context {
  15         int match_baselen;
  16         int match;
  17 };
  18
  19 static 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.page.mimetype) {
  41                 if (buffer_is_binary(buf, size)) {
  42                         ctx.page.mimetype = "application/octet-stream";
  43                         ctx.page.charset = NULL;
  44                 } else {
  45                         ctx.page.mimetype = "text/plain";
  46                 }
  47         }
  48         ctx.page.filename = path;
  49         ctx.page.size = size;
  50         ctx.page.etag = sha1_to_hex(sha1);
  51         cgit_print_http_headers();
  52         html_raw(buf, size);
  53         free(mimetype);
  54         free(buf);
  55         return 1;
  56 }
  57
  58 static char *buildpath(const char *base, int baselen, const char *path)
  59 {
  60         if (path[0])
  61                 return fmtalloc("%.*s%s/", baselen, base, path);
  62         else
  63                 return fmtalloc("%.*s/", baselen, base);
  64 }
  65
  66 static void print_dir(const unsigned char *sha1, const char *base,
  67                       int baselen, const char *path)
  68 {
  69         char *fullpath, *slash;
  70         size_t len;
  71
  72         fullpath = buildpath(base, baselen, path);
  73         slash = (fullpath[0] == '/' ? "" : "/");
  74         ctx.page.etag = sha1_to_hex(sha1);
  75         cgit_print_http_headers();
  76         htmlf("<html><head><title>%s", slash);
  77         html_txt(fullpath);
  78         htmlf("</title></head>\n<body>\n<h2>%s", slash);
  79         html_txt(fullpath);
  80         html("</h2>\n<ul>\n");
  81         len = strlen(fullpath);
  82         if (len > 1) {
  83                 fullpath[len - 1] = 0;
  84                 slash = strrchr(fullpath, '/');
  85                 if (slash)
  86                         *(slash + 1) = 0;
  87                 else {
  88                         free(fullpath);
  89                         fullpath = NULL;
  90                 }
  91                 html("<li>");
  92                 cgit_plain_link("../", NULL, NULL, ctx.qry.head, ctx.qry.sha1,
  93                                 fullpath);
  94                 html("</li>\n");
  95         }
  96         free(fullpath);
  97 }
  98
  99 static void print_dir_entry(const unsigned char *sha1, const char *base,
 100                             int baselen, const char *path, unsigned mode)
 101 {
 102         char *fullpath;
 103
 104         fullpath = buildpath(base, baselen, path);
 105         if (!S_ISDIR(mode) && !S_ISGITLINK(mode))
 106                 fullpath[strlen(fullpath) - 1] = 0;
 107         html("  <li>");
 108         if (S_ISGITLINK(mode)) {
 109                 cgit_submodule_link(NULL, fullpath, sha1_to_hex(sha1));
 110         } else
 111                 cgit_plain_link(path, NULL, NULL, ctx.qry.head, ctx.qry.sha1,
 112                                 fullpath);
 113         html("</li>\n");
 114         free(fullpath);
 115 }
 116
 117 static void print_dir_tail(void)
 118 {
 119         html(" </ul>\n</body></html>\n");
 120 }
 121
 122 static int walk_tree(const unsigned char *sha1, struct strbuf *base,
 123                 const char *pathname, unsigned mode, int stage, void *cbdata)
 124 {
 125         struct walk_tree_context *walk_tree_ctx = cbdata;
 126
 127         if (base->len == walk_tree_ctx->match_baselen) {
 128                 if (S_ISREG(mode)) {
 129                         if (print_object(sha1, pathname))
 130                                 walk_tree_ctx->match = 1;
 131                 } else if (S_ISDIR(mode)) {
 132                         print_dir(sha1, base->buf, base->len, pathname);
 133                         walk_tree_ctx->match = 2;
 134                         return READ_TREE_RECURSIVE;
 135                 }
 136         } else if (base->len > walk_tree_ctx->match_baselen) {
 137                 print_dir_entry(sha1, base->buf, base->len, pathname, mode);
 138                 walk_tree_ctx->match = 2;
 139         } else if (S_ISDIR(mode)) {
 140                 return READ_TREE_RECURSIVE;
 141         }
 142
 143         return 0;
 144 }
 145
 146 static int basedir_len(const char *path)
 147 {
 148         char *p = strrchr(path, '/');
 149         if (p)
 150                 return p - path + 1;
 151         return 0;
 152 }
 153
 154 void cgit_print_plain(void)
 155 {
 156         const char *rev = ctx.qry.sha1;
 157         unsigned char sha1[20];
 158         struct commit *commit;
 159         struct pathspec_item path_items = {
 160                 .match = ctx.qry.path,
 161                 .len = ctx.qry.path ? strlen(ctx.qry.path) : 0
 162         };
 163         struct pathspec paths = {
 164                 .nr = 1,
 165                 .items = &path_items
 166         };
 167         struct walk_tree_context walk_tree_ctx = {
 168                 .match = 0
 169         };
 170
 171         if (!rev)
 172                 rev = ctx.qry.head;
 173
 174         if (get_sha1(rev, sha1)) {
 175                 cgit_print_error_page(404, "Not found", "Not found");
 176                 return;
 177         }
 178         commit = lookup_commit_reference(sha1);
 179         if (!commit || parse_commit(commit)) {
 180                 cgit_print_error_page(404, "Not found", "Not found");
 181                 return;
 182         }
 183         if (!path_items.match) {
 184                 path_items.match = "";
 185                 walk_tree_ctx.match_baselen = -1;
 186                 print_dir(commit->tree->object.sha1, "", 0, "");
 187                 walk_tree_ctx.match = 2;
 188         }
 189         else
 190                 walk_tree_ctx.match_baselen = basedir_len(path_items.match);
 191         read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
 192         if (!walk_tree_ctx.match)
 193                 cgit_print_error_page(404, "Not found", "Not found");
 194         else if (walk_tree_ctx.match == 2)
 195                 print_dir_tail();
 196 }