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, lookup_commit_reference(the_repository, &oid)->maybe_tree,
  60                 "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
  61
  62 done:
  63         free(path_items.match);
  64         return walk_tree_ctx.found_path;
  65 }
  66
  67 int cgit_print_file(char *path, const char *head, int file_only)
  68 {
  69         struct object_id oid;
  70         enum object_type type;
  71         char *buf;
  72         unsigned long size;
  73         struct commit *commit;
  74         struct pathspec_item path_items = {
  75                 .match = path,
  76                 .len = strlen(path)
  77         };
  78         struct pathspec paths = {
  79                 .nr = 1,
  80                 .items = &path_items
  81         };
  82         struct walk_tree_context walk_tree_ctx = {
  83                 .match_path = path,
  84                 .matched_oid = &oid,
  85                 .found_path = 0,
  86                 .file_only = file_only
  87         };
  88
  89         if (get_oid(head, &oid))
  90                 return -1;
  91         type = oid_object_info(the_repository, &oid, &size);
  92         if (type == OBJ_COMMIT) {
  93                 commit = lookup_commit_reference(the_repository, &oid);
  94                 read_tree_recursive(the_repository, commit->maybe_tree,
  95                         "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
  96                 if (!walk_tree_ctx.found_path)
  97                         return -1;
  98                 type = oid_object_info(the_repository, &oid, &size);
  99         }
 100         if (type == OBJ_BAD)
 101                 return -1;
 102         buf = read_object_file(&oid, &type, &size);
 103         if (!buf)
 104                 return -1;
 105         buf[size] = '\0';
 106         html_raw(buf, size);
 107         free(buf);
 108         return 0;
 109 }
 110
 111 void cgit_print_blob(const char *hex, char *path, const char *head, int file_only)
 112 {
 113         struct object_id oid;
 114         enum object_type type;
 115         char *buf;
 116         unsigned long size;
 117         struct commit *commit;
 118         struct pathspec_item path_items = {
 119                 .match = path,
 120                 .len = path ? strlen(path) : 0
 121         };
 122         struct pathspec paths = {
 123                 .nr = 1,
 124                 .items = &path_items
 125         };
 126         struct walk_tree_context walk_tree_ctx = {
 127                 .match_path = path,
 128                 .matched_oid = &oid,
 129                 .found_path = 0,
 130                 .file_only = file_only
 131         };
 132
 133         if (hex) {
 134                 if (get_oid_hex(hex, &oid)) {
 135                         cgit_print_error_page(400, "Bad request",
 136                                         "Bad hex value: %s", hex);
 137                         return;
 138                 }
 139         } else {
 140                 if (get_oid(head, &oid)) {
 141                         cgit_print_error_page(404, "Not found",
 142                                         "Bad ref: %s", head);
 143                         return;
 144                 }
 145         }
 146
 147         type = oid_object_info(the_repository, &oid, &size);
 148
 149         if ((!hex) && type == OBJ_COMMIT && path) {
 150                 commit = lookup_commit_reference(the_repository, &oid);
 151                 read_tree_recursive(the_repository, commit->maybe_tree,
 152                         "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
 153                 type = oid_object_info(the_repository, &oid, &size);
 154         }
 155
 156         if (type == OBJ_BAD) {
 157                 cgit_print_error_page(404, "Not found",
 158                                 "Bad object name: %s", hex);
 159                 return;
 160         }
 161
 162         buf = read_object_file(&oid, &type, &size);
 163         if (!buf) {
 164                 cgit_print_error_page(500, "Internal server error",
 165                                 "Error reading object %s", hex);
 166                 return;
 167         }
 168
 169         buf[size] = '\0';
 170         if (buffer_is_binary(buf, size))
 171                 ctx.page.mimetype = "application/octet-stream";
 172         else
 173                 ctx.page.mimetype = "text/plain";
 174         ctx.page.filename = path;
 175
 176         html("X-Content-Type-Options: nosniff\n");
 177         html("Content-Security-Policy: default-src 'none'\n");
 178         cgit_print_http_headers();
 179         html_raw(buf, size);
 180         free(buf);
 181 }