ui-blob.c

   1 /* ui-blob.c: show blob content
   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-blob.h"
  11 #include "html.h"
  12 #include "ui-shared.h"
  13
  14 struct walk_tree_context {
  15         const char *match_path;
  16         struct object_id *matched_oid;
  17         unsigned int found_path:1;
  18         unsigned int file_only:1;
  19 };
  20
  21 static int walk_tree(const struct object_id *oid, struct strbuf *base,
  22                 const char *pathname, unsigned mode, int stage, void *cbdata)
  23 {
  24         struct walk_tree_context *walk_tree_ctx = cbdata;
  25
  26         if (walk_tree_ctx->file_only && !S_ISREG(mode))
  27                 return READ_TREE_RECURSIVE;
  28         if (strncmp(base->buf, walk_tree_ctx->match_path, base->len)
  29                 || strcmp(walk_tree_ctx->match_path + base->len, pathname))
  30                 return READ_TREE_RECURSIVE;
  31         oidcpy(walk_tree_ctx->matched_oid, oid);
  32         walk_tree_ctx->found_path = 1;
  33         return 0;
  34 }
  35
  36 int cgit_ref_path_exists(const char *path, const char *ref, int file_only)
  37 {
  38         struct object_id oid;
  39         unsigned long size;
  40         struct pathspec_item path_items = {
  41                 .match = xstrdup(path),
  42                 .len = strlen(path)
  43         };
  44         struct pathspec paths = {
  45                 .nr = 1,
  46                 .items = &path_items
  47         };
  48         struct walk_tree_context walk_tree_ctx = {
  49                 .match_path = path,
  50                 .matched_oid = &oid,
  51                 .found_path = 0,
  52                 .file_only = file_only
  53         };
  54
  55         if (get_oid(ref, &oid))
  56                 goto done;
  57         if (oid_object_info(the_repository, &oid, &size) != OBJ_COMMIT)
  58                 goto done;
  59         read_tree_recursive(the_repository,
  60                             repo_get_commit_tree(the_repository, lookup_commit_reference(the_repository, &oid)),
  61                             "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
  62
  63 done:
  64         free(path_items.match);
  65         return walk_tree_ctx.found_path;
  66 }
  67
  68 int cgit_print_file(char *path, const char *head, int file_only)
  69 {
  70         struct object_id oid;
  71         enum object_type type;
  72         char *buf;
  73         unsigned long size;
  74         struct commit *commit;
  75         struct pathspec_item path_items = {
  76                 .match = path,
  77                 .len = strlen(path)
  78         };
  79         struct pathspec paths = {
  80                 .nr = 1,
  81                 .items = &path_items
  82         };
  83         struct walk_tree_context walk_tree_ctx = {
  84                 .match_path = path,
  85                 .matched_oid = &oid,
  86                 .found_path = 0,
  87                 .file_only = file_only
  88         };
  89
  90         if (get_oid(head, &oid))
  91                 return -1;
  92         type = oid_object_info(the_repository, &oid, &size);
  93         if (type == OBJ_COMMIT) {
  94                 commit = lookup_commit_reference(the_repository, &oid);
  95                 read_tree_recursive(the_repository,
  96                                     repo_get_commit_tree(the_repository, commit),
  97                                     "", 0, 0, &paths, walk_tree,
  98                                     &walk_tree_ctx);
  99                 if (!walk_tree_ctx.found_path)
 100                         return -1;
 101                 type = oid_object_info(the_repository, &oid, &size);
 102         }
 103         if (type == OBJ_BAD)
 104                 return -1;
 105         buf = read_object_file(&oid, &type, &size);
 106         if (!buf)
 107                 return -1;
 108         buf[size] = '\0';
 109         html_raw(buf, size);
 110         free(buf);
 111         return 0;
 112 }
 113
 114 void cgit_print_blob(const char *hex, char *path, const char *head, int file_only)
 115 {
 116         struct object_id oid;
 117         enum object_type type;
 118         char *buf;
 119         unsigned long size;
 120         struct commit *commit;
 121         struct pathspec_item path_items = {
 122                 .match = path,
 123                 .len = path ? strlen(path) : 0
 124         };
 125         struct pathspec paths = {
 126                 .nr = 1,
 127                 .items = &path_items
 128         };
 129         struct walk_tree_context walk_tree_ctx = {
 130                 .match_path = path,
 131                 .matched_oid = &oid,
 132                 .found_path = 0,
 133                 .file_only = file_only
 134         };
 135
 136         if (hex) {
 137                 if (get_oid_hex(hex, &oid)) {
 138                         cgit_print_error_page(400, "Bad request",
 139                                         "Bad hex value: %s", hex);
 140                         return;
 141                 }
 142         } else {
 143                 if (get_oid(head, &oid)) {
 144                         cgit_print_error_page(404, "Not found",
 145                                         "Bad ref: %s", head);
 146                         return;
 147                 }
 148         }
 149
 150         type = oid_object_info(the_repository, &oid, &size);
 151
 152         if ((!hex) && type == OBJ_COMMIT && path) {
 153                 commit = lookup_commit_reference(the_repository, &oid);
 154                 read_tree_recursive(the_repository,
 155                                     repo_get_commit_tree(the_repository, commit),
 156                                     "", 0, 0, &paths, walk_tree,
 157                                     &walk_tree_ctx);
 158                 type = oid_object_info(the_repository, &oid, &size);
 159         }
 160
 161         if (type == OBJ_BAD) {
 162                 cgit_print_error_page(404, "Not found",
 163                                 "Bad object name: %s", hex);
 164                 return;
 165         }
 166
 167         buf = read_object_file(&oid, &type, &size);
 168         if (!buf) {
 169                 cgit_print_error_page(500, "Internal server error",
 170                                 "Error reading object %s", hex);
 171                 return;
 172         }
 173
 174         buf[size] = '\0';
 175         if (buffer_is_binary(buf, size))
 176                 ctx.page.mimetype = "application/octet-stream";
 177         else
 178                 ctx.page.mimetype = "text/plain";
 179         ctx.page.filename = path;
 180
 181         html("X-Content-Type-Options: nosniff\n");
 182         html("Content-Security-Policy: default-src 'none'\n");
 183         cgit_print_http_headers();
 184         html_raw(buf, size);
 185         free(buf);
 186 }