1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132
|
/**
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0.
*/
#include <aws/common/byte_buf.h>
#include <aws/common/json.h>
#include <aws/common/macros.h>
#include <aws/common/string.h>
#include <aws/sdkutils/partitions.h>
#include <aws/sdkutils/private/endpoints_types_impl.h>
#include <aws/sdkutils/private/endpoints_util.h>
#include <inttypes.h>
#include <stdio.h>
/* TODO: checking for unknown enum values is annoying and is brittle. compile
time assert on enum size or members would make it a lot simpler. */
/*
* How rule resolution works.
* Note: read comments in endpoint_types_impl.h first to understand type system.
*
* Initial scope is created from parameters defined in request context and
* default values defined in ruleset (s_init_top_level_scope). Validation that
* all required parameters have values is done at this point as well.
*
* Rules are then resolved sequentially against scope.
* First list of conditions associated with the rule is resolved
* (s_resolve_conditions). Final result of conditions resolution is an AND of
* truthiness of resolved values (as defined in is_value_truthy) for each
* condition. If resolution is true then rule is selected.
* - For endpoint and error rules that means terminal state is reached and rule
* data is returned
* - For tree rule, the engine starts resolving rules associated with tree rule.
* Note: tree rules are terminal and once engine jumps into tree rule
* resolution there is no way to jump back out.
*
* Conditions can add values to scope. Those values are valid for the duration of
* rule resolution. Note: for tree rules, any values added in tree conditions are
* valid for all rules within the tree.
* Scope can be though of as a 'leveled' structure. Top level or 0 level
* represents all values from context and defaults. Levels 1 and up represent
* values added by rules. Ex. if we start at level 0, all values added by rule
* can be though of as level 1.
* Since tree rule cannot be exited from, engine is simplified by making all
* values in scope top level whenever tree is jumped into. So in practice engine
* goes back between top level and first level as resolving rules. If that
* changes in future, scope can add explicit level number and cleanup only values
* at that level when going to next rule.
*
* Overall flow is as follows:
* - Start with any values provided in context as scope
* - Add any default values provided in ruleset and validate all required
* params are specified.
* - Iterate through rules and resolve each rule:
* -- resolve conditions with side effects
* -- if conditions are truthy return rule result
* -- if conditions are truthy and rule is tree, jump down a level and
* restart resolution with tree rules
* -- if conditions are falsy, rollback level and go to next rule
* - if no rules match, resolution fails with exhausted error.
*/
struct resolve_template_callback_data {
struct aws_allocator *allocator;
struct aws_endpoints_resolution_scope *scope;
};
AWS_STATIC_ASSERT(AWS_ENDPOINTS_VALUE_SIZE == 7);
static bool is_value_truthy(const struct aws_endpoints_value *value) {
switch (value->type) {
case AWS_ENDPOINTS_VALUE_NONE:
return false;
case AWS_ENDPOINTS_VALUE_BOOLEAN:
return value->v.boolean;
case AWS_ENDPOINTS_VALUE_ARRAY:
case AWS_ENDPOINTS_VALUE_STRING:
case AWS_ENDPOINTS_VALUE_OBJECT:
return true;
case AWS_ENDPOINTS_VALUE_NUMBER:
return value->v.number != 0;
default:
AWS_ASSERT(false);
return false;
}
}
void s_scope_value_destroy_cb(void *data) {
struct aws_endpoints_scope_value *value = data;
aws_endpoints_scope_value_destroy(value);
}
static int s_deep_copy_context_to_scope(
struct aws_allocator *allocator,
const struct aws_endpoints_request_context *context,
struct aws_endpoints_resolution_scope *scope) {
struct aws_endpoints_scope_value *new_value = NULL;
for (struct aws_hash_iter iter = aws_hash_iter_begin(&context->values); !aws_hash_iter_done(&iter);
aws_hash_iter_next(&iter)) {
struct aws_endpoints_scope_value *context_value = (struct aws_endpoints_scope_value *)iter.element.value;
new_value = aws_endpoints_scope_value_new(allocator, context_value->name.cur);
if (aws_endpoints_deep_copy_parameter_value(allocator, &context_value->value, &new_value->value)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to deep copy value.");
goto on_error;
}
if (aws_hash_table_put(&scope->values, &new_value->name.cur, new_value, NULL)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to add deep copy to scope.");
goto on_error;
}
}
return AWS_OP_SUCCESS;
on_error:
aws_endpoints_scope_value_destroy(new_value);
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_INIT_FAILED);
}
static int s_init_top_level_scope(
struct aws_allocator *allocator,
const struct aws_endpoints_request_context *context,
const struct aws_endpoints_ruleset *ruleset,
const struct aws_partitions_config *partitions,
struct aws_endpoints_resolution_scope *scope) {
AWS_PRECONDITION(allocator);
AWS_PRECONDITION(context);
AWS_PRECONDITION(ruleset);
AWS_PRECONDITION(scope);
struct aws_endpoints_scope_value *val = NULL;
scope->rule_idx = 0;
scope->rules = &ruleset->rules;
scope->partitions = partitions;
if (aws_hash_table_init(
&scope->values,
allocator,
0,
aws_hash_byte_cursor_ptr,
aws_endpoints_byte_cursor_eq,
NULL,
s_scope_value_destroy_cb)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to init request context values.");
goto on_error;
}
if (s_deep_copy_context_to_scope(allocator, context, scope)) {
goto on_error;
}
if (aws_array_list_init_dynamic(&scope->added_keys, allocator, 10, sizeof(struct aws_byte_cursor))) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to init added keys.");
goto on_error;
}
/* Add defaults to the top level scope. */
for (struct aws_hash_iter iter = aws_hash_iter_begin(&ruleset->parameters); !aws_hash_iter_done(&iter);
aws_hash_iter_next(&iter)) {
const struct aws_byte_cursor key = *(const struct aws_byte_cursor *)iter.element.key;
struct aws_endpoints_parameter *value = (struct aws_endpoints_parameter *)iter.element.value;
/* Skip non-required values, since they cannot have default values. */
if (!value->is_required) {
continue;
}
struct aws_hash_element *existing = NULL;
if (aws_hash_table_find(&scope->values, &key, &existing)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to init request context values.");
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_INIT_FAILED);
}
if (existing == NULL) {
if (!value->has_default_value) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "No value or default for required parameter.");
goto on_error;
}
val = aws_endpoints_scope_value_new(allocator, key);
AWS_ASSERT(val);
switch (value->type) {
case AWS_ENDPOINTS_PARAMETER_STRING:
val->value.type = AWS_ENDPOINTS_VALUE_STRING;
val->value.v.owning_cursor_string =
aws_endpoints_non_owning_cursor_create(value->default_value.string);
break;
case AWS_ENDPOINTS_PARAMETER_BOOLEAN:
val->value.type = AWS_ENDPOINTS_VALUE_BOOLEAN;
val->value.v.boolean = value->default_value.boolean;
break;
default:
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Unexpected parameter type.");
goto on_error;
}
if (aws_hash_table_put(&scope->values, &val->name.cur, val, NULL)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to add value to top level scope.");
goto on_error;
}
}
}
return AWS_OP_SUCCESS;
on_error:
aws_endpoints_scope_value_destroy(val);
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_INIT_FAILED);
}
static void s_scope_clean_up(struct aws_endpoints_resolution_scope *scope) {
AWS_PRECONDITION(scope);
aws_hash_table_clean_up(&scope->values);
aws_array_list_clean_up(&scope->added_keys);
}
static int s_resolve_expr(
struct aws_allocator *allocator,
struct aws_endpoints_expr *expr,
struct aws_endpoints_resolution_scope *scope,
struct aws_endpoints_value *out_value);
static int s_resolve_template(
struct aws_byte_cursor template,
void *user_data,
struct aws_owning_cursor *out_owning_cursor);
int aws_endpoints_argv_expect(
struct aws_allocator *allocator,
struct aws_endpoints_resolution_scope *scope,
struct aws_array_list *argv,
size_t idx,
enum aws_endpoints_value_type expected_type,
struct aws_endpoints_value *out_value) {
AWS_ZERO_STRUCT(*out_value);
struct aws_endpoints_value argv_value = {0};
struct aws_endpoints_expr argv_expr;
if (aws_array_list_get_at(argv, &argv_expr, idx)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to parse argv");
goto on_error;
}
if (s_resolve_expr(allocator, &argv_expr, scope, &argv_value)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to resolve argv.");
goto on_error;
}
if (expected_type != AWS_ENDPOINTS_VALUE_ANY && argv_value.type != expected_type) {
AWS_LOGF_ERROR(
AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE,
"Unexpected arg type actual: %u expected %u.",
argv_value.type,
expected_type);
goto on_error;
}
*out_value = argv_value;
return AWS_OP_SUCCESS;
on_error:
aws_endpoints_value_clean_up(&argv_value);
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_FAILED);
}
/*
******************************
* Expr/String resolve
******************************
*/
static int s_resolve_expr(
struct aws_allocator *allocator,
struct aws_endpoints_expr *expr,
struct aws_endpoints_resolution_scope *scope,
struct aws_endpoints_value *out_value) {
AWS_ZERO_STRUCT(*out_value);
switch (expr->type) {
case AWS_ENDPOINTS_EXPR_STRING: {
struct aws_byte_buf buf;
struct resolve_template_callback_data data = {.allocator = allocator, .scope = scope};
if (aws_byte_buf_init_from_resolved_templated_string(
allocator, &buf, expr->e.string, s_resolve_template, &data, false)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to resolve templated string.");
goto on_error;
}
out_value->type = AWS_ENDPOINTS_VALUE_STRING;
out_value->v.owning_cursor_string =
aws_endpoints_owning_cursor_from_string(aws_string_new_from_buf(allocator, &buf));
aws_byte_buf_clean_up(&buf);
break;
}
case AWS_ENDPOINTS_EXPR_BOOLEAN: {
out_value->type = AWS_ENDPOINTS_VALUE_BOOLEAN;
out_value->v.boolean = expr->e.boolean;
break;
}
case AWS_ENDPOINTS_EXPR_NUMBER: {
out_value->type = AWS_ENDPOINTS_VALUE_NUMBER;
out_value->v.number = expr->e.number;
break;
}
case AWS_ENDPOINTS_EXPR_ARRAY: {
out_value->type = AWS_ENDPOINTS_VALUE_ARRAY;
/* TODO: deep copy */
out_value->v.array = expr->e.array;
break;
}
case AWS_ENDPOINTS_EXPR_REFERENCE: {
struct aws_hash_element *element;
if (aws_hash_table_find(&scope->values, &expr->e.reference, &element)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to deref.");
goto on_error;
}
if (element == NULL) {
out_value->type = AWS_ENDPOINTS_VALUE_NONE;
} else {
struct aws_endpoints_scope_value *aws_endpoints_scope_value = element->value;
*out_value = aws_endpoints_scope_value->value;
if (aws_endpoints_scope_value->value.type == AWS_ENDPOINTS_VALUE_STRING) {
/* Value will not own underlying mem and instead its owned
by the scope, so set it to NULL. */
out_value->v.owning_cursor_string.string = NULL;
} else if (aws_endpoints_scope_value->value.type == AWS_ENDPOINTS_VALUE_OBJECT) {
out_value->v.owning_cursor_object.string = NULL;
}
}
break;
}
case AWS_ENDPOINTS_EXPR_FUNCTION: {
if (aws_endpoints_dispatch_standard_lib_fn_resolve(
expr->e.function.fn, allocator, &expr->e.function.argv, scope, out_value)) {
goto on_error;
}
break;
}
}
return AWS_OP_SUCCESS;
on_error:
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_FAILED);
}
static int s_resolve_one_condition(
struct aws_allocator *allocator,
struct aws_endpoints_condition *condition,
struct aws_endpoints_resolution_scope *scope,
bool *out_is_truthy) {
struct aws_endpoints_scope_value *scope_value = NULL;
struct aws_endpoints_value val;
if (s_resolve_expr(allocator, &condition->expr, scope, &val)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to resolve expr.");
goto on_error;
}
*out_is_truthy = is_value_truthy(&val);
/* Note: assigning value is skipped if condition is falsy, since nothing can
use it and that avoids adding value and then removing it from scope right away. */
if (*out_is_truthy && condition->assign.len > 0) {
/* If condition assigns a value, push it to scope and let scope
handle value memory. */
scope_value = aws_endpoints_scope_value_new(allocator, condition->assign);
scope_value->value = val;
if (aws_array_list_push_back(&scope->added_keys, &scope_value->name.cur)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to update key at given scope.");
goto on_error;
}
int was_created = 1;
if (aws_hash_table_put(&scope->values, &scope_value->name.cur, scope_value, &was_created)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to set assigned variable.");
goto on_error;
}
/* Shadowing existing values is prohibited. */
if (!was_created) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Assigned variable shadows existing one.");
goto on_error;
}
} else {
/* Otherwise clean up temp value */
aws_endpoints_value_clean_up(&val);
}
return AWS_OP_SUCCESS;
on_error:
aws_endpoints_scope_value_destroy(scope_value);
/* Only cleanup value if mem ownership was not transferred to scope value. */
if (scope_value == NULL) {
aws_endpoints_value_clean_up(&val);
}
*out_is_truthy = false;
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_FAILED);
}
static int s_resolve_conditions(
struct aws_allocator *allocator,
const struct aws_array_list *conditions,
struct aws_endpoints_resolution_scope *scope,
bool *out_is_truthy) {
/* Note: spec defines empty conditions list as truthy. */
*out_is_truthy = true;
for (size_t idx = 0; idx < aws_array_list_length(conditions); ++idx) {
struct aws_endpoints_condition *condition = NULL;
if (aws_array_list_get_at_ptr(conditions, (void **)&condition, idx)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to retrieve condition.");
goto on_error;
}
if (s_resolve_one_condition(allocator, condition, scope, out_is_truthy)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to resolve condition.");
goto on_error;
}
/* truthiness of all conditions is an AND of truthiness for each condition,
hence first false one short circuits resolution */
if (!*out_is_truthy) {
break;
}
}
return AWS_OP_SUCCESS;
on_error:
*out_is_truthy = false;
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_FAILED);
}
int aws_endpoints_path_through_array(
struct aws_allocator *allocator,
struct aws_endpoints_resolution_scope *scope,
struct aws_endpoints_value *value,
struct aws_byte_cursor path_cur,
struct aws_endpoints_value *out_value) {
AWS_PRECONDITION(value->type == AWS_ENDPOINTS_VALUE_ARRAY);
uint64_t index;
struct aws_byte_cursor split = {0};
if ((!aws_byte_cursor_next_split(&path_cur, '[', &split) || split.len > 0) ||
!aws_byte_cursor_next_split(&path_cur, ']', &split) || aws_byte_cursor_utf8_parse_u64(split, &index)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Could not parse index from template string.");
goto on_error;
}
if (index < aws_array_list_length(&value->v.array)) {
out_value->type = AWS_ENDPOINTS_VALUE_NONE;
return AWS_OP_SUCCESS;
}
struct aws_endpoints_expr *expr = NULL;
if (aws_array_list_get_at_ptr(&value->v.array, (void **)&expr, (size_t)index)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to index into resolved value");
goto on_error;
}
struct aws_endpoints_value val;
if (s_resolve_expr(allocator, expr, scope, &val)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to resolve val.");
aws_endpoints_value_clean_up(&val);
goto on_error;
}
*out_value = val;
return AWS_OP_SUCCESS;
on_error:
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_FAILED);
}
int aws_endpoints_path_through_object(
struct aws_allocator *allocator,
struct aws_endpoints_value *value,
struct aws_byte_cursor path_cur,
struct aws_endpoints_value *out_value) {
AWS_ZERO_STRUCT(*out_value);
struct aws_json_value *root_node = NULL;
struct aws_byte_cursor value_cur = value->type != AWS_ENDPOINTS_VALUE_STRING ? value->v.owning_cursor_string.cur
: value->v.owning_cursor_object.cur;
root_node = aws_json_value_new_from_string(allocator, value_cur);
const struct aws_json_value *result;
if (aws_path_through_json(allocator, root_node, path_cur, &result)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to path through json.");
goto on_error;
}
if (result == NULL) {
out_value->type = AWS_ENDPOINTS_VALUE_NONE;
} else if (aws_json_value_is_string(result)) {
struct aws_byte_cursor final;
if (aws_json_value_get_string(result, &final)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Could not parse string from node.");
goto on_error;
}
out_value->type = AWS_ENDPOINTS_VALUE_STRING;
out_value->v.owning_cursor_string = aws_endpoints_owning_cursor_from_cursor(allocator, final);
} else if (aws_json_value_is_array(result) || aws_json_value_is_object(result)) {
struct aws_byte_buf json_blob;
aws_byte_buf_init(&json_blob, allocator, 0);
if (aws_byte_buf_append_json_string(result, &json_blob)) {
aws_byte_buf_clean_up(&json_blob);
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to extract properties.");
goto on_error;
}
aws_byte_buf_clean_up(&json_blob);
out_value->type = AWS_ENDPOINTS_VALUE_OBJECT;
out_value->v.owning_cursor_object =
aws_endpoints_owning_cursor_from_string(aws_string_new_from_buf(allocator, &json_blob));
} else if (aws_json_value_is_boolean(result)) {
if (aws_json_value_get_boolean(result, &out_value->v.boolean)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Could not parse boolean from node.");
goto on_error;
}
out_value->type = AWS_ENDPOINTS_VALUE_BOOLEAN;
} else if (aws_json_value_is_number(result)) {
if (aws_json_value_get_number(result, &out_value->v.number)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Could not parse number from node.");
goto on_error;
}
out_value->type = AWS_ENDPOINTS_VALUE_NUMBER;
}
aws_json_value_destroy(root_node);
return AWS_OP_SUCCESS;
on_error:
aws_json_value_destroy(root_node);
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_FAILED);
}
static int s_resolve_templated_value_with_pathing(
struct aws_allocator *allocator,
struct aws_endpoints_resolution_scope *scope,
struct aws_byte_cursor template_cur,
struct aws_owning_cursor *out_owning_cursor) {
struct aws_endpoints_value resolved_value = {0};
struct aws_byte_cursor split = {0};
if (!aws_byte_cursor_next_split(&template_cur, '#', &split) || split.len == 0) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Invalid value in template string.");
goto on_error;
}
struct aws_hash_element *elem = NULL;
if (aws_hash_table_find(&scope->values, &split, &elem) || elem == NULL) {
AWS_LOGF_ERROR(
AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Templated value does not exist: " PRInSTR, AWS_BYTE_CURSOR_PRI(split));
goto on_error;
}
struct aws_endpoints_scope_value *scope_value = elem->value;
if (!aws_byte_cursor_next_split(&template_cur, '#', &split)) {
if (scope_value->value.type != AWS_ENDPOINTS_VALUE_STRING) {
AWS_LOGF_ERROR(
AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Unexpected type: must be string if pathing is not provided");
goto on_error;
}
*out_owning_cursor = aws_endpoints_non_owning_cursor_create(scope_value->value.v.owning_cursor_string.cur);
return AWS_OP_SUCCESS;
}
if (scope_value->value.type == AWS_ENDPOINTS_VALUE_OBJECT) {
if (aws_endpoints_path_through_object(allocator, &scope_value->value, split, &resolved_value)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to path through object.");
goto on_error;
}
} else if (scope_value->value.type == AWS_ENDPOINTS_VALUE_ARRAY) {
if (aws_endpoints_path_through_array(allocator, scope, &scope_value->value, split, &resolved_value)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to path through array.");
goto on_error;
}
} else {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Invalid value type for pathing through.");
goto on_error;
}
if (resolved_value.type != AWS_ENDPOINTS_VALUE_STRING) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Templated string didn't resolve to string");
goto on_error;
}
if (resolved_value.v.owning_cursor_string.string != NULL) {
/* Transfer ownership of the underlying string. */
*out_owning_cursor = aws_endpoints_owning_cursor_from_string(resolved_value.v.owning_cursor_string.string);
resolved_value.v.owning_cursor_string.string = NULL;
} else {
/* Unlikely to get here since current pathing always return new string. */
*out_owning_cursor = aws_endpoints_non_owning_cursor_create(resolved_value.v.owning_cursor_string.cur);
}
aws_endpoints_value_clean_up(&resolved_value);
return AWS_OP_SUCCESS;
on_error:
aws_endpoints_value_clean_up(&resolved_value);
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_FAILED);
}
static int s_resolve_template(struct aws_byte_cursor template, void *user_data, struct aws_owning_cursor *out_cursor) {
struct resolve_template_callback_data *data = user_data;
if (s_resolve_templated_value_with_pathing(data->allocator, data->scope, template, out_cursor)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to resolve template value.");
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_FAILED);
;
}
return AWS_OP_SUCCESS;
}
/*
******************************
* Request Context
******************************
*/
static void s_endpoints_request_context_destroy(void *data) {
if (data == NULL) {
return;
}
struct aws_endpoints_request_context *context = data;
aws_hash_table_clean_up(&context->values);
aws_mem_release(context->allocator, context);
}
struct aws_endpoints_request_context *aws_endpoints_request_context_new(struct aws_allocator *allocator) {
AWS_PRECONDITION(allocator);
struct aws_endpoints_request_context *context =
aws_mem_calloc(allocator, 1, sizeof(struct aws_endpoints_request_context));
context->allocator = allocator;
aws_ref_count_init(&context->ref_count, context, s_endpoints_request_context_destroy);
if (aws_hash_table_init(
&context->values,
allocator,
0,
aws_hash_byte_cursor_ptr,
aws_endpoints_byte_cursor_eq,
NULL,
s_scope_value_destroy_cb)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to init request context values.");
goto on_error;
}
return context;
on_error:
s_endpoints_request_context_destroy(context);
return NULL;
}
struct aws_endpoints_request_context *aws_endpoints_request_context_acquire(
struct aws_endpoints_request_context *request_context) {
AWS_PRECONDITION(request_context);
if (request_context) {
aws_ref_count_acquire(&request_context->ref_count);
}
return request_context;
}
struct aws_endpoints_request_context *aws_endpoints_request_context_release(
struct aws_endpoints_request_context *request_context) {
if (request_context) {
aws_ref_count_release(&request_context->ref_count);
}
return NULL;
}
int aws_endpoints_request_context_add_string(
struct aws_allocator *allocator,
struct aws_endpoints_request_context *context,
struct aws_byte_cursor name,
struct aws_byte_cursor value) {
AWS_PRECONDITION(allocator);
struct aws_endpoints_scope_value *val = aws_endpoints_scope_value_new(allocator, name);
val->value.type = AWS_ENDPOINTS_VALUE_STRING;
val->value.v.owning_cursor_string = aws_endpoints_owning_cursor_from_cursor(allocator, value);
if (aws_hash_table_put(&context->values, &val->name.cur, val, NULL)) {
aws_endpoints_scope_value_destroy(val);
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_INIT_FAILED);
};
return AWS_OP_SUCCESS;
}
int aws_endpoints_request_context_add_boolean(
struct aws_allocator *allocator,
struct aws_endpoints_request_context *context,
struct aws_byte_cursor name,
bool value) {
AWS_PRECONDITION(allocator);
struct aws_endpoints_scope_value *val = aws_endpoints_scope_value_new(allocator, name);
val->value.type = AWS_ENDPOINTS_VALUE_BOOLEAN;
val->value.v.boolean = value;
if (aws_hash_table_put(&context->values, &val->name.cur, val, NULL)) {
aws_endpoints_scope_value_destroy(val);
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_INIT_FAILED);
};
return AWS_OP_SUCCESS;
}
/*
******************************
* Rule engine.
******************************
*/
struct aws_endpoints_resolved_endpoint {
struct aws_allocator *allocator;
struct aws_ref_count ref_count;
enum aws_endpoints_resolved_endpoint_type type;
union {
struct resolved_endpoint {
struct aws_byte_buf url;
struct aws_byte_buf properties;
struct aws_hash_table headers;
} endpoint;
struct aws_byte_buf error;
} r;
};
static void s_endpoints_resolved_endpoint_destroy(void *data) {
if (data == NULL) {
return;
}
struct aws_endpoints_resolved_endpoint *resolved = data;
if (resolved->type == AWS_ENDPOINTS_RESOLVED_ENDPOINT) {
aws_byte_buf_clean_up(&resolved->r.endpoint.url);
aws_byte_buf_clean_up(&resolved->r.endpoint.properties);
aws_hash_table_clean_up(&resolved->r.endpoint.headers);
} else if (resolved->type == AWS_ENDPOINTS_RESOLVED_ERROR) {
aws_byte_buf_clean_up(&resolved->r.error);
}
aws_mem_release(resolved->allocator, resolved);
}
struct aws_endpoints_resolved_endpoint *s_endpoints_resolved_endpoint_new(struct aws_allocator *allocator) {
AWS_PRECONDITION(allocator);
struct aws_endpoints_resolved_endpoint *resolved =
aws_mem_calloc(allocator, 1, sizeof(struct aws_endpoints_resolved_endpoint));
resolved->allocator = allocator;
aws_ref_count_init(&resolved->ref_count, resolved, s_endpoints_resolved_endpoint_destroy);
return resolved;
}
struct aws_endpoints_resolved_endpoint *aws_endpoints_resolved_endpoint_acquire(
struct aws_endpoints_resolved_endpoint *resolved_endpoint) {
AWS_PRECONDITION(resolved_endpoint);
if (resolved_endpoint) {
aws_ref_count_acquire(&resolved_endpoint->ref_count);
}
return resolved_endpoint;
}
struct aws_endpoints_resolved_endpoint *aws_endpoints_resolved_endpoint_release(
struct aws_endpoints_resolved_endpoint *resolved_endpoint) {
if (resolved_endpoint) {
aws_ref_count_release(&resolved_endpoint->ref_count);
}
return NULL;
}
enum aws_endpoints_resolved_endpoint_type aws_endpoints_resolved_endpoint_get_type(
const struct aws_endpoints_resolved_endpoint *resolved_endpoint) {
AWS_PRECONDITION(resolved_endpoint);
return resolved_endpoint->type;
}
int aws_endpoints_resolved_endpoint_get_url(
const struct aws_endpoints_resolved_endpoint *resolved_endpoint,
struct aws_byte_cursor *out_url) {
AWS_PRECONDITION(resolved_endpoint);
AWS_PRECONDITION(out_url);
if (resolved_endpoint->type != AWS_ENDPOINTS_RESOLVED_ENDPOINT) {
return aws_raise_error(AWS_ERROR_INVALID_ARGUMENT);
}
*out_url = aws_byte_cursor_from_buf(&resolved_endpoint->r.endpoint.url);
return AWS_OP_SUCCESS;
}
int aws_endpoints_resolved_endpoint_get_properties(
const struct aws_endpoints_resolved_endpoint *resolved_endpoint,
struct aws_byte_cursor *out_properties) {
AWS_PRECONDITION(resolved_endpoint);
AWS_PRECONDITION(out_properties);
if (resolved_endpoint->type != AWS_ENDPOINTS_RESOLVED_ENDPOINT) {
return aws_raise_error(AWS_ERROR_INVALID_ARGUMENT);
}
*out_properties = aws_byte_cursor_from_buf(&resolved_endpoint->r.endpoint.properties);
return AWS_OP_SUCCESS;
}
int aws_endpoints_resolved_endpoint_get_headers(
const struct aws_endpoints_resolved_endpoint *resolved_endpoint,
const struct aws_hash_table **out_headers) {
AWS_PRECONDITION(resolved_endpoint);
AWS_PRECONDITION(out_headers);
if (resolved_endpoint->type != AWS_ENDPOINTS_RESOLVED_ENDPOINT) {
return aws_raise_error(AWS_ERROR_INVALID_ARGUMENT);
}
*out_headers = &resolved_endpoint->r.endpoint.headers;
return AWS_OP_SUCCESS;
}
int aws_endpoints_resolved_endpoint_get_error(
const struct aws_endpoints_resolved_endpoint *resolved_endpoint,
struct aws_byte_cursor *out_error) {
AWS_PRECONDITION(resolved_endpoint);
AWS_PRECONDITION(out_error);
if (resolved_endpoint->type != AWS_ENDPOINTS_RESOLVED_ERROR) {
return aws_raise_error(AWS_ERROR_INVALID_ARGUMENT);
}
*out_error = aws_byte_cursor_from_buf(&resolved_endpoint->r.error);
return AWS_OP_SUCCESS;
}
struct aws_endpoints_rule_engine {
struct aws_allocator *allocator;
struct aws_ref_count ref_count;
struct aws_endpoints_ruleset *ruleset;
struct aws_partitions_config *partitions_config;
};
static void s_endpoints_rule_engine_destroy(void *data) {
if (data == NULL) {
return;
}
struct aws_endpoints_rule_engine *engine = data;
aws_endpoints_ruleset_release(engine->ruleset);
aws_partitions_config_release(engine->partitions_config);
aws_mem_release(engine->allocator, engine);
}
struct aws_endpoints_rule_engine *aws_endpoints_rule_engine_new(
struct aws_allocator *allocator,
struct aws_endpoints_ruleset *ruleset,
struct aws_partitions_config *partitions_config) {
AWS_PRECONDITION(allocator);
AWS_PRECONDITION(ruleset);
struct aws_endpoints_rule_engine *engine = aws_mem_calloc(allocator, 1, sizeof(struct aws_endpoints_rule_engine));
engine->allocator = allocator;
engine->ruleset = ruleset;
engine->partitions_config = partitions_config;
aws_endpoints_ruleset_acquire(ruleset);
aws_partitions_config_acquire(partitions_config);
aws_ref_count_init(&engine->ref_count, engine, s_endpoints_rule_engine_destroy);
return engine;
}
struct aws_endpoints_rule_engine *aws_endpoints_rule_engine_acquire(struct aws_endpoints_rule_engine *rule_engine) {
AWS_PRECONDITION(rule_engine);
if (rule_engine) {
aws_ref_count_acquire(&rule_engine->ref_count);
}
return rule_engine;
}
struct aws_endpoints_rule_engine *aws_endpoints_rule_engine_release(struct aws_endpoints_rule_engine *rule_engine) {
if (rule_engine) {
aws_ref_count_release(&rule_engine->ref_count);
}
return NULL;
}
int s_revert_scope(struct aws_endpoints_resolution_scope *scope) {
for (size_t idx = 0; idx < aws_array_list_length(&scope->added_keys); ++idx) {
struct aws_byte_cursor *cur = NULL;
if (aws_array_list_get_at_ptr(&scope->added_keys, (void **)&cur, idx)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to retrieve value.");
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_FAILED);
}
aws_hash_table_remove(&scope->values, cur, NULL, NULL);
}
aws_array_list_clear(&scope->added_keys);
return AWS_OP_SUCCESS;
}
static void s_on_string_array_element_destroy(void *element) {
struct aws_string *str = *(struct aws_string **)element;
aws_string_destroy(str);
}
static void s_callback_headers_destroy(void *data) {
struct aws_array_list *array = data;
struct aws_allocator *alloc = array->alloc;
aws_array_list_deep_clean_up(array, s_on_string_array_element_destroy);
aws_mem_release(alloc, array);
}
static int s_resolve_headers(
struct aws_allocator *allocator,
struct aws_endpoints_resolution_scope *scope,
struct aws_hash_table *headers,
struct aws_hash_table *out_headers) {
struct aws_endpoints_value value;
struct aws_array_list *resolved_headers = NULL;
if (aws_hash_table_init(
out_headers,
allocator,
aws_hash_table_get_entry_count(headers),
aws_hash_string,
aws_hash_callback_string_eq,
aws_hash_callback_string_destroy,
s_callback_headers_destroy)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to init table for resolved headers");
goto on_error;
}
for (struct aws_hash_iter iter = aws_hash_iter_begin(headers); !aws_hash_iter_done(&iter);
aws_hash_iter_next(&iter)) {
struct aws_string *key = (struct aws_string *)iter.element.key;
struct aws_array_list *header_list = (struct aws_array_list *)iter.element.value;
resolved_headers = aws_mem_calloc(allocator, 1, sizeof(struct aws_array_list));
aws_array_list_init_dynamic(
resolved_headers, allocator, aws_array_list_length(header_list), sizeof(struct aws_string *));
for (size_t i = 0; i < aws_array_list_length(header_list); ++i) {
struct aws_endpoints_expr *expr = NULL;
if (aws_array_list_get_at_ptr(header_list, (void **)&expr, i)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to get header.");
goto on_error;
}
if (s_resolve_expr(allocator, expr, scope, &value) || value.type != AWS_ENDPOINTS_VALUE_STRING) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to resolve header expr.");
goto on_error;
}
struct aws_string *str = aws_string_new_from_cursor(allocator, &value.v.owning_cursor_string.cur);
if (aws_array_list_push_back(resolved_headers, &str)) {
aws_string_destroy(str);
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to add resolved header to result.");
goto on_error;
}
aws_endpoints_value_clean_up(&value);
}
if (aws_hash_table_put(out_headers, aws_string_clone_or_reuse(allocator, key), resolved_headers, NULL)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to add resolved header to result.");
goto on_error;
}
}
return AWS_OP_SUCCESS;
on_error:
aws_endpoints_value_clean_up(&value);
if (resolved_headers != NULL) {
s_callback_headers_destroy(resolved_headers);
}
aws_hash_table_clean_up(out_headers);
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_FAILED);
}
int aws_endpoints_rule_engine_resolve(
struct aws_endpoints_rule_engine *engine,
const struct aws_endpoints_request_context *context,
struct aws_endpoints_resolved_endpoint **out_resolved_endpoint) {
if (aws_array_list_length(&engine->ruleset->rules) == 0) {
return aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_EMPTY_RULESET);
}
int result = AWS_OP_SUCCESS;
struct aws_endpoints_resolution_scope scope;
if (s_init_top_level_scope(engine->allocator, context, engine->ruleset, engine->partitions_config, &scope)) {
result = AWS_OP_ERR;
goto on_done;
}
while (scope.rule_idx < aws_array_list_length(scope.rules)) {
struct aws_endpoints_rule *rule = NULL;
if (aws_array_list_get_at_ptr(scope.rules, (void **)&rule, scope.rule_idx)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to get rule.");
result = AWS_OP_ERR;
goto on_done;
}
bool is_truthy = false;
if (s_resolve_conditions(engine->allocator, &rule->conditions, &scope, &is_truthy)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to resolve conditions.");
result = AWS_OP_ERR;
goto on_done;
}
if (!is_truthy) {
s_revert_scope(&scope);
++scope.rule_idx;
continue;
}
switch (rule->type) {
case AWS_ENDPOINTS_RULE_ENDPOINT: {
struct aws_endpoints_resolved_endpoint *endpoint = s_endpoints_resolved_endpoint_new(engine->allocator);
endpoint->type = AWS_ENDPOINTS_RESOLVED_ENDPOINT;
struct aws_endpoints_value val;
if (s_resolve_expr(engine->allocator, &rule->rule_data.endpoint.url, &scope, &val) ||
val.type != AWS_ENDPOINTS_VALUE_STRING ||
aws_byte_buf_init_copy_from_cursor(
&endpoint->r.endpoint.url, engine->allocator, val.v.owning_cursor_string.cur)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to resolve templated url.");
result = AWS_OP_ERR;
goto on_done;
}
aws_endpoints_value_clean_up(&val);
struct resolve_template_callback_data data = {.allocator = engine->allocator, .scope = &scope};
if (rule->rule_data.endpoint.properties.len > 0 &&
aws_byte_buf_init_from_resolved_templated_string(
engine->allocator,
&endpoint->r.endpoint.properties,
aws_byte_cursor_from_buf(&rule->rule_data.endpoint.properties),
s_resolve_template,
&data,
true)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to resolve templated properties.");
result = AWS_OP_ERR;
goto on_done;
}
if (s_resolve_headers(
engine->allocator, &scope, &rule->rule_data.endpoint.headers, &endpoint->r.endpoint.headers)) {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to resolve templated headers.");
result = AWS_OP_ERR;
goto on_done;
}
*out_resolved_endpoint = endpoint;
goto on_done;
}
case AWS_ENDPOINTS_RULE_ERROR: {
struct aws_endpoints_resolved_endpoint *error = s_endpoints_resolved_endpoint_new(engine->allocator);
error->type = AWS_ENDPOINTS_RESOLVED_ERROR;
struct aws_endpoints_value val;
if (s_resolve_expr(engine->allocator, &rule->rule_data.error.error, &scope, &val) ||
val.type != AWS_ENDPOINTS_VALUE_STRING ||
aws_byte_buf_init_copy_from_cursor(
&error->r.error, engine->allocator, val.v.owning_cursor_string.cur)) {
aws_endpoints_value_clean_up(&val);
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Failed to resolve templated url.");
result = AWS_OP_ERR;
goto on_done;
}
aws_endpoints_value_clean_up(&val);
*out_resolved_endpoint = error;
goto on_done;
}
case AWS_ENDPOINTS_RULE_TREE: {
/* jumping down a level */
aws_array_list_clear(&scope.added_keys);
scope.rule_idx = 0;
scope.rules = &rule->rule_data.tree.rules;
continue;
}
default: {
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Unexpected rule type.");
result = aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RESOLVE_FAILED);
goto on_done;
}
}
}
AWS_LOGF_ERROR(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "All rules have been exhausted.");
result = aws_raise_error(AWS_ERROR_SDKUTILS_ENDPOINTS_RULESET_EXHAUSTED);
on_done:
AWS_LOGF_DEBUG(AWS_LS_SDKUTILS_ENDPOINTS_RESOLVE, "Resolved endpoint with status %d", result);
s_scope_clean_up(&scope);
return result;
}
|