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feat(routing): implement router nesting

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This commit is contained in:
Jef Roosens 2024-03-02 11:26:51 +01:00
parent 2ce49a3347
commit cf4451740f
Signed by: Jef Roosens
GPG key ID: B75D4F293C7052DB
2 changed files with 12 additions and 63 deletions
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64
src/http/lnm_http_router.c
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@ -359,74 +359,24 @@ lnm_err lnm_http_router_merge(lnm_http_router *r1, lnm_http_router *r2) {
lnm_err lnm_http_router_nest(lnm_http_router *parent, lnm_http_router *child,
const char *prefix) {
size_t prefix_len = strlen(prefix);
if (!is_ascii(prefix) || prefix[0] != '/' || prefix[prefix_len - 1] == '/') {
if (!is_ascii(prefix) || prefix[0] != '/') {
return lnm_err_invalid_route;
}
lnm_http_router *merge_target = parent;
lnm_http_router *router = parent;
// The child router's routes are also mounted on '/', so we stop one earlier
// as we need to merge it with the router representing the '/'
while (*(prefix + 1) != '\0') {
while (*prefix != '\0') {
unsigned char c = *prefix;
if (merge_target->exact_children[c] == NULL) {
LNM_RES(lnm_http_router_init(&merge_target->exact_children[c]));
if (router->exact_children[c] == NULL) {
LNM_RES(lnm_http_router_init(&router->exact_children[c]));
}
merge_target = merge_target->exact_children[c];
router = router->exact_children[c];
prefix++;
}
// We check whether there are any conflicts between the child and the existing
// router
bool conflicting = merge_target->single_segment_child != NULL &&
child->single_segment_child != NULL;
for (lnm_http_method m = 0; !conflicting && m < lnm_http_method_total; m++) {
conflicting =
conflicting ||
(merge_target->routes[m] != NULL && child->routes[m] != NULL) ||
(merge_target->multi_segment_routes[m] != NULL &&
child->multi_segment_routes[m] != NULL);
}
for (unsigned char c = 0; !conflicting && c < 128; c++) {
conflicting = conflicting || (merge_target->exact_children[c] != NULL &&
child->exact_children[c] != NULL);
}
if (conflicting) {
return lnm_err_overlapping_route;
}
// Merge routers
merge_target->represents_route =
merge_target->represents_route || child->represents_route;
if (child->single_segment_child != NULL) {
merge_target->single_segment_child = child->single_segment_child;
}
for (lnm_http_method m = 0; m < lnm_http_method_total; m++) {
if (child->routes[m] != NULL) {
merge_target->routes[m] = child->routes[m];
}
if (child->multi_segment_routes[m] != NULL) {
merge_target->multi_segment_routes[m] = child->multi_segment_routes[m];
}
}
for (unsigned char c = 0; c < 128; c++) {
if (child->exact_children[c] != NULL) {
merge_target->exact_children[c] = child->exact_children[c];
}
}
free(child);
return lnm_err_ok;
return lnm_http_router_merge(router, child);
}