added on local at 2026-07-01 21:47:32
| 1 | #!/usr/bin/perl | |
| 2 | #====================================================================== | |
| 3 | # RePricer - Authenticated download endpoint. | |
| 4 | # | |
| 5 | # GET /download.cgi?order=N&item=M (download every clean file in the | |
| 6 | # order_item's model as a single zip) | |
| 7 | # GET /download.cgi?order=N&file=F (download one specific model_file) | |
| 8 | # | |
| 9 | # Authorization: the request must either come from the buyer who | |
| 10 | # placed the order (via repricer_buyer_session cookie on the | |
| 11 | # storefront's account) OR include a one-time signed token that the | |
| 12 | # email receipt embeds. The 30-day window is enforced by paid_at. | |
| 13 | # | |
| 14 | # Storage: this implementation handles local-disk storage today. R2/ | |
| 15 | # B2/S3 backends will plug in once the upload pipeline writes there. | |
| 16 | # Until then storage_key is treated as a path relative to the private | |
| 17 | # files dir. | |
| 18 | #====================================================================== | |
| 19 | use strict; | |
| 20 | use warnings; | |
| 21 | ||
| 22 | use lib '/var/www/vhosts/3dshawn.com/repricer.3dshawn.com'; | |
| 23 | use CGI; | |
| 24 | use MODS::DBConnect; | |
| 25 | use MODS::RePricer::Config; | |
| 26 | use MODS::RePricer::BuyerAuth; | |
| 27 | use MODS::RePricer::SignedDownload; | |
| 28 | use MODS::RePricer::R2Sign; | |
| 29 | use Digest::SHA qw(sha256_hex); | |
| 30 | ||
| 31 | $| = 1; | |
| 32 | ||
| 33 | my $q = CGI->new; | |
| 34 | my $form = $q->Vars; | |
| 35 | my $db = MODS::DBConnect->new; | |
| 36 | my $cfg = MODS::RePricer::Config->new; | |
| 37 | my $buyer_auth = MODS::RePricer::BuyerAuth->new; | |
| 38 | my $DB = $cfg->settings('database_name'); | |
| 39 | ||
| 40 | my $PRIVATE_FILES = '/var/www/vhosts/repricer.com/private/files'; | |
| 41 | my $DOWNLOAD_WINDOW_DAYS = 30; | |
| 42 | ||
| 43 | sub _bail { | |
| 44 | my ($code, $msg) = @_; | |
| 45 | print "Status: $code\nContent-Type: text/plain\n\n$msg\n"; | |
| 46 | exit; | |
| 47 | } | |
| 48 | ||
| 49 | my $oid = $form->{order} || 0; | |
| 50 | $oid =~ s/[^0-9]//g; | |
| 51 | my $item_id = $form->{item} || 0; | |
| 52 | $item_id =~ s/[^0-9]//g; | |
| 53 | my $file_id = $form->{file} || 0; | |
| 54 | $file_id =~ s/[^0-9]//g; | |
| 55 | # Bundle-component access: when set, restricts the file lookup to a | |
| 56 | # specific component model of the bundle on the order_items row. Lets | |
| 57 | # my_orders.cgi expand a digital bundle into per-file download buttons. | |
| 58 | my $bundle_model = $form->{bundle_model} || 0; | |
| 59 | $bundle_model =~ s/[^0-9]//g; | |
| 60 | ||
| 61 | _bail('404 Not Found', 'Missing order id.') unless $oid; | |
| 62 | ||
| 63 | my $dbh = $db->db_connect(); | |
| 64 | my $order = $db->db_readwrite($dbh, qq~ | |
| 65 | SELECT id, storefront_id, buyer_account_id, buyer_email, status, paid_at, | |
| 66 | TIMESTAMPDIFF(DAY, paid_at, NOW()) AS days_since_paid | |
| 67 | FROM `${DB}`.orders | |
| 68 | WHERE id='$oid' LIMIT 1 | |
| 69 | ~, $ENV{SCRIPT_NAME}, __LINE__); | |
| 70 | ||
| 71 | unless ($order && $order->{id}) { | |
| 72 | $db->db_disconnect($dbh); | |
| 73 | _bail('404 Not Found', 'Order not found.'); | |
| 74 | } | |
| 75 | unless (($order->{status} || '') eq 'paid') { | |
| 76 | $db->db_disconnect($dbh); | |
| 77 | _bail('402 Payment Required', 'Order is not paid.'); | |
| 78 | } | |
| 79 | if (defined $order->{days_since_paid} && $order->{days_since_paid} > $DOWNLOAD_WINDOW_DAYS) { | |
| 80 | $db->db_disconnect($dbh); | |
| 81 | _bail('410 Gone', 'Download window has expired.'); | |
| 82 | } | |
| 83 | ||
| 84 | # Authorize the request via one of two paths: | |
| 85 | # 1. Buyer is signed in to the storefront via cookie AND the session | |
| 86 | # email matches the order's buyer_email. | |
| 87 | # 2. The URL carries a signed token (?t=...) minted by SignedDownload | |
| 88 | # with the same order/file/paid_at, proving it came from a receipt | |
| 89 | # email we sent. Guests checking out without an account can only | |
| 90 | # download via this path. | |
| 91 | # Either path counts as authorized; both checks happen so a logged-in | |
| 92 | # buyer can also use a receipt link if they prefer. | |
| 93 | my $authorized = 0; | |
| 94 | my $buyer = $buyer_auth->verify($q, $db, $dbh, $DB); | |
| 95 | if ($buyer && $buyer->{storefront_id} | |
| 96 | && $buyer->{storefront_id} == $order->{storefront_id} | |
| 97 | && lc($buyer->{email}) eq lc($order->{buyer_email} || '')) { | |
| 98 | $authorized = 1; | |
| 99 | } | |
| 100 | if (!$authorized && $form->{t}) { | |
| 101 | my $tok = $form->{t}; | |
| 102 | $tok =~ s/[^a-zA-Z0-9._\-]//g; | |
| 103 | my $v = MODS::RePricer::SignedDownload->verify($tok); | |
| 104 | if ($v->{ok} && $v->{order_id} == $oid) { | |
| 105 | # Token is bound to a specific file_id -- restrict the request | |
| 106 | # to that file if the caller didn't already specify one. If they | |
| 107 | # did, we require the two match so a leaked token for file A | |
| 108 | # can't be used to grab file B. | |
| 109 | if (!$file_id) { | |
| 110 | $file_id = $v->{file_id}; | |
| 111 | } elsif ($file_id != $v->{file_id}) { | |
| 112 | $db->db_disconnect($dbh); | |
| 113 | _bail('403 Forbidden', 'Token does not authorize this file.'); | |
| 114 | } | |
| 115 | $authorized = 1; | |
| 116 | } | |
| 117 | } | |
| 118 | unless ($authorized) { | |
| 119 | $db->db_disconnect($dbh); | |
| 120 | _bail('403 Forbidden', 'Sign in to download or use the link from your receipt email.'); | |
| 121 | } | |
| 122 | ||
| 123 | # Resolve the file row. Two paths: | |
| 124 | # ?file=F -> serve that specific model_file (must belong to a model in this order) | |
| 125 | # ?item=M -> serve the primary (first clean) model_file of that order_item | |
| 126 | my $file; | |
| 127 | if ($file_id) { | |
| 128 | $file = $db->db_readwrite($dbh, qq~ | |
| 129 | SELECT mf.id, mf.filename, mf.storage_provider, mf.storage_key, | |
| 130 | mf.file_size_bytes, mf.scan_status, mf.model_id | |
| 131 | FROM `${DB}`.model_files mf | |
| 132 | JOIN `${DB}`.order_items oi ON oi.model_id = mf.model_id | |
| 133 | WHERE oi.order_id='$oid' AND mf.id='$file_id' | |
| 134 | LIMIT 1 | |
| 135 | ~, $ENV{SCRIPT_NAME}, __LINE__); | |
| 136 | } | |
| 137 | elsif ($item_id && $bundle_model) { | |
| 138 | # Bundle-component access: verify the order_item is a bundle row | |
| 139 | # AND the requested model belongs to that bundle. Then serve the | |
| 140 | # first clean file of that component model. | |
| 141 | my $check = $db->db_readwrite($dbh, qq~ | |
| 142 | SELECT bi.model_id FROM `${DB}`.order_items oi | |
| 143 | JOIN `${DB}`.bundle_items bi ON bi.bundle_id = oi.bundle_id | |
| 144 | WHERE oi.id='$item_id' AND oi.order_id='$oid' | |
| 145 | AND bi.model_id='$bundle_model' LIMIT 1 | |
| 146 | ~, $ENV{SCRIPT_NAME}, __LINE__); | |
| 147 | if ($check && $check->{model_id}) { | |
| 148 | $file = $db->db_readwrite($dbh, qq~ | |
| 149 | SELECT mf.id, mf.filename, mf.storage_provider, mf.storage_key, | |
| 150 | mf.file_size_bytes, mf.scan_status, mf.model_id | |
| 151 | FROM `${DB}`.model_files mf | |
| 152 | WHERE mf.model_id='$bundle_model' AND mf.scan_status='clean' | |
| 153 | ORDER BY mf.is_supported_variant DESC, mf.id ASC | |
| 154 | LIMIT 1 | |
| 155 | ~, $ENV{SCRIPT_NAME}, __LINE__); | |
| 156 | } | |
| 157 | } | |
| 158 | elsif ($item_id) { | |
| 159 | $file = $db->db_readwrite($dbh, qq~ | |
| 160 | SELECT mf.id, mf.filename, mf.storage_provider, mf.storage_key, | |
| 161 | mf.file_size_bytes, mf.scan_status, mf.model_id | |
| 162 | FROM `${DB}`.model_files mf | |
| 163 | JOIN `${DB}`.order_items oi ON oi.model_id = mf.model_id | |
| 164 | WHERE oi.id='$item_id' AND oi.order_id='$oid' | |
| 165 | AND mf.scan_status='clean' | |
| 166 | ORDER BY mf.is_supported_variant DESC, mf.id ASC | |
| 167 | LIMIT 1 | |
| 168 | ~, $ENV{SCRIPT_NAME}, __LINE__); | |
| 169 | } | |
| 170 | ||
| 171 | unless ($file && $file->{id}) { | |
| 172 | $db->db_disconnect($dbh); | |
| 173 | _bail('404 Not Found', 'No downloadable file for this order item.'); | |
| 174 | } | |
| 175 | unless (($file->{scan_status} || '') eq 'clean') { | |
| 176 | $db->db_disconnect($dbh); | |
| 177 | _bail('423 Locked', 'File is still being scanned.'); | |
| 178 | } | |
| 179 | ||
| 180 | # Storage resolution. Two paths: | |
| 181 | # local -> stream the file from /var/www/.../private/files/<key> | |
| 182 | # r2 -> 302 redirect to a short-lived AWS-sigv4 pre-signed URL | |
| 183 | # at the R2 endpoint. R2 streams the bytes; our CGI just | |
| 184 | # hands the client a URL and exits. | |
| 185 | # | |
| 186 | # b2 / s3 would slot in here as additional providers using the same | |
| 187 | # pattern. The downloads ledger is written either way so usage | |
| 188 | # accounting is unchanged. | |
| 189 | my $provider = $file->{storage_provider} || 'local'; | |
| 190 | my $ip_hash = sha256_hex(($ENV{REMOTE_ADDR} || '') . '|repricer'); | |
| 191 | my $ua_hash = sha256_hex(($ENV{HTTP_USER_AGENT} || '') . '|repricer'); | |
| 192 | my $fn = $file->{filename} || 'download.stl'; | |
| 193 | $fn =~ s/["\\\r\n]/_/g; | |
| 194 | ||
| 195 | if ($provider eq 'r2') { | |
| 196 | my $r2 = MODS::RePricer::R2Sign->new; | |
| 197 | unless ($r2->is_configured) { | |
| 198 | $db->db_disconnect($dbh); | |
| 199 | _bail('501 Not Implemented', 'R2 is the storage provider for this file but R2 credentials are not configured. Add them in Software Configuration.'); | |
| 200 | } | |
| 201 | my $key = $file->{storage_key} || ''; | |
| 202 | # We don't validate path-traversal characters on R2 keys -- the | |
| 203 | # bucket namespace is flat and sigv4 will reject malformed keys | |
| 204 | # via the canonical URI mismatch. But we DO reject empty keys. | |
| 205 | unless (length $key) { | |
| 206 | $db->db_disconnect($dbh); | |
| 207 | _bail('404 Not Found', 'No storage key on the file row.'); | |
| 208 | } | |
| 209 | ||
| 210 | my $url = $r2->presigned_get_url( | |
| 211 | key => $key, | |
| 212 | expires => 600, | |
| 213 | response_content_disposition => qq~attachment; filename="$fn"~, | |
| 214 | response_content_type => 'application/octet-stream', | |
| 215 | ); | |
| 216 | unless ($url) { | |
| 217 | $db->db_disconnect($dbh); | |
| 218 | _bail('500 Internal Server Error', 'Could not sign R2 URL.'); | |
| 219 | } | |
| 220 | ||
| 221 | # Log the download. bytes_served=0 because the actual streaming | |
| 222 | # happens at R2 and we don't see the size; the file's recorded | |
| 223 | # size_bytes column on model_files is the better metric for | |
| 224 | # accounting. | |
| 225 | $db->db_readwrite($dbh, qq~ | |
| 226 | INSERT INTO `${DB}`.downloads | |
| 227 | SET order_id='$oid', | |
| 228 | model_file_id='$file->{id}', | |
| 229 | ip_hash='$ip_hash', | |
| 230 | user_agent_hash='$ua_hash', | |
| 231 | bytes_served='0' | |
| 232 | ~, $ENV{SCRIPT_NAME}, __LINE__); | |
| 233 | $db->db_disconnect($dbh); | |
| 234 | ||
| 235 | print "Status: 302 Found\nLocation: $url\nCache-Control: no-cache, private\n\n"; | |
| 236 | exit; | |
| 237 | } | |
| 238 | ||
| 239 | if ($provider ne 'local') { | |
| 240 | $db->db_disconnect($dbh); | |
| 241 | _bail('501 Not Implemented', 'Remote storage provider "' . $provider . '" is not supported. Supported: local, r2.'); | |
| 242 | } | |
| 243 | ||
| 244 | # ---- local-disk path ---- | |
| 245 | my $key = $file->{storage_key} || ''; | |
| 246 | if ($key =~ m{(^/|\\|\.\.)}) { | |
| 247 | $db->db_disconnect($dbh); | |
| 248 | _bail('400 Bad Request', 'Invalid storage key.'); | |
| 249 | } | |
| 250 | my $disk_path = "$PRIVATE_FILES/$key"; | |
| 251 | unless (-r $disk_path) { | |
| 252 | $db->db_disconnect($dbh); | |
| 253 | _bail('404 Not Found', 'File missing on disk.'); | |
| 254 | } | |
| 255 | ||
| 256 | my $size = -s $disk_path; | |
| 257 | $db->db_readwrite($dbh, qq~ | |
| 258 | INSERT INTO `${DB}`.downloads | |
| 259 | SET order_id='$oid', | |
| 260 | model_file_id='$file->{id}', | |
| 261 | ip_hash='$ip_hash', | |
| 262 | user_agent_hash='$ua_hash', | |
| 263 | bytes_served='$size' | |
| 264 | ~, $ENV{SCRIPT_NAME}, __LINE__); | |
| 265 | $db->db_disconnect($dbh); | |
| 266 | ||
| 267 | binmode(STDOUT); | |
| 268 | print "Content-Type: application/octet-stream\n"; | |
| 269 | print "Content-Disposition: attachment; filename=\"$fn\"\n"; | |
| 270 | print "Content-Length: $size\n"; | |
| 271 | print "Cache-Control: no-cache, private\n\n"; | |
| 272 | ||
| 273 | open(my $fh, '<', $disk_path) or _bail('500 Internal Server Error', 'open failed'); | |
| 274 | binmode($fh); | |
| 275 | my $buf; | |
| 276 | while (read($fh, $buf, 65536)) { print $buf; } | |
| 277 | close($fh); | |
| 278 | exit; |