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, 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(the_repository,
  60                   repo_get_commit_tree(the_repository, lookup_commit_reference(the_repository, &oid)),
  61                   &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(the_repository, repo_get_commit_tree(the_repository, commit),
  96                           &paths, walk_tree, &walk_tree_ctx);
  97                 if (!walk_tree_ctx.found_path)
  98                         return -1;
  99                 type = oid_object_info(the_repository, &oid, &size);
 100         }
 101         if (type == OBJ_BAD)
 102                 return -1;
 103         buf = read_object_file(&oid, &type, &size);
 104         if (!buf)
 105                 return -1;
 106         buf[size] = '\0';
 107         html_raw(buf, size);
 108         free(buf);
 109         return 0;
 110 }
 111
 112 void cgit_print_blob(const char *hex, char *path, const char *head, int file_only)
 113 {
 114         struct object_id oid;
 115         enum object_type type;
 116         char *buf;
 117         unsigned long size;
 118         struct commit *commit;
 119         struct pathspec_item path_items = {
 120                 .match = path,
 121                 .len = path ? strlen(path) : 0
 122         };
 123         struct pathspec paths = {
 124                 .nr = 1,
 125                 .items = &path_items
 126         };
 127         struct walk_tree_context walk_tree_ctx = {
 128                 .match_path = path,
 129                 .matched_oid = &oid,
 130                 .found_path = 0,
 131                 .file_only = file_only
 132         };
 133
 134         if (hex) {
 135                 if (get_oid_hex(hex, &oid)) {
 136                         cgit_print_error_page(400, "Bad request",
 137                                         "Bad hex value: %s", hex);
 138                         return;
 139                 }
 140         } else {
 141                 if (get_oid(head, &oid)) {
 142                         cgit_print_error_page(404, "Not found",
 143                                         "Bad ref: %s", head);
 144                         return;
 145                 }
 146         }
 147
 148         type = oid_object_info(the_repository, &oid, &size);
 149
 150         if ((!hex) && type == OBJ_COMMIT && path) {
 151                 commit = lookup_commit_reference(the_repository, &oid);
 152                 read_tree(the_repository, repo_get_commit_tree(the_repository, commit),
 153                           &paths, walk_tree, &walk_tree_ctx);
 154                 type = oid_object_info(the_repository, &oid, &size);
 155         }
 156
 157         if (type == OBJ_BAD) {
 158                 cgit_print_error_page(404, "Not found",
 159                                 "Bad object name: %s", hex);
 160                 return;
 161         }
 162
 163         buf = read_object_file(&oid, &type, &size);
 164         if (!buf) {
 165                 cgit_print_error_page(500, "Internal server error",
 166                                 "Error reading object %s", hex);
 167                 return;
 168         }
 169
 170         buf[size] = '\0';
 171         if (buffer_is_binary(buf, size))
 172                 ctx.page.mimetype = "application/octet-stream";
 173         else
 174                 ctx.page.mimetype = "text/plain";
 175         ctx.page.filename = path;
 176
 177         html("X-Content-Type-Options: nosniff\n");
 178         html("Content-Security-Policy: default-src 'none'\n");
 179         cgit_print_http_headers();
 180         html_raw(buf, size);
 181         free(buf);
 182 }