diff options
Diffstat (limited to 'debian/vendor-h2o/lib/handler/throttle_resp.c')
-rw-r--r-- | debian/vendor-h2o/lib/handler/throttle_resp.c | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/debian/vendor-h2o/lib/handler/throttle_resp.c b/debian/vendor-h2o/lib/handler/throttle_resp.c deleted file mode 100644 index a0028b5..0000000 --- a/debian/vendor-h2o/lib/handler/throttle_resp.c +++ /dev/null @@ -1,156 +0,0 @@ -/* - * Copyright (c) 2016 Justin Zhu - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to - * deal in the Software without restriction, including without limitation the - * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS - * IN THE SOFTWARE. - */ -#include <stdlib.h> -#include "h2o.h" - -#ifndef HUNDRED_MS -#define HUNDRED_MS 100 -#endif - -#ifndef ONE_SECOND -#define ONE_SECOND 1000 -#endif - -typedef H2O_VECTOR(h2o_iovec_t) iovec_vector_t; - -typedef struct st_throttle_resp_t { - h2o_ostream_t super; - h2o_timeout_entry_t timeout_entry; - int64_t tokens; - size_t token_inc; - h2o_context_t *ctx; - h2o_req_t *req; - struct { - iovec_vector_t bufs; - h2o_send_state_t stream_state; - } state; -} throttle_resp_t; - -static void real_send(throttle_resp_t *self) -{ - /* a really simple token bucket implementation */ - assert(self->tokens > 0); - size_t i, token_consume; - - token_consume = 0; - - for (i = 0; i < self->state.bufs.size; i++) { - token_consume += self->state.bufs.entries[i].len; - } - - self->tokens -= token_consume; - - h2o_ostream_send_next(&self->super, self->req, self->state.bufs.entries, self->state.bufs.size, self->state.stream_state); - if (!h2o_send_state_is_in_progress(self->state.stream_state)) - h2o_timeout_unlink(&self->timeout_entry); -} - -static void add_token(h2o_timeout_entry_t *entry) -{ - throttle_resp_t *self = H2O_STRUCT_FROM_MEMBER(throttle_resp_t, timeout_entry, entry); - - h2o_timeout_link(self->ctx->loop, &self->ctx->hundred_ms_timeout, &self->timeout_entry); - self->tokens += self->token_inc; - - if (self->tokens > 0) - real_send(self); -} - -static void on_send(h2o_ostream_t *_self, h2o_req_t *req, h2o_iovec_t *inbufs, size_t inbufcnt, h2o_send_state_t state) -{ - throttle_resp_t *self = (void *)_self; - size_t i; - - /* I don't know if this is a proper way. */ - h2o_vector_reserve(&req->pool, &self->state.bufs, inbufcnt); - /* start to save state */ - for (i = 0; i < inbufcnt; ++i) { - self->state.bufs.entries[i] = inbufs[i]; - } - self->state.bufs.size = inbufcnt; - self->state.stream_state = state; - - /* if there's token, we try to send */ - if (self->tokens > 0) - real_send(self); -} - -static void on_stop(h2o_ostream_t *_self, h2o_req_t *req) -{ - throttle_resp_t *self = (void *)_self; - if (h2o_timeout_is_linked(&self->timeout_entry)) { - h2o_timeout_unlink(&self->timeout_entry); - } -} - -static void on_setup_ostream(h2o_filter_t *self, h2o_req_t *req, h2o_ostream_t **slot) -{ - throttle_resp_t *throttle; - h2o_iovec_t traffic_header_value; - size_t traffic_limit; - - if (req->res.status != 200) - goto Next; - if (h2o_memis(req->input.method.base, req->input.method.len, H2O_STRLIT("HEAD"))) - goto Next; - - ssize_t xt_index; - if ((xt_index = h2o_find_header(&req->res.headers, H2O_TOKEN_X_TRAFFIC, -1)) == -1) - goto Next; - - traffic_header_value = req->res.headers.entries[xt_index].value; - char *buf = traffic_header_value.base; - - if (H2O_UNLIKELY((traffic_limit = h2o_strtosizefwd(&buf, traffic_header_value.len)) == SIZE_MAX)) - goto Next; - - throttle = (void *)h2o_add_ostream(req, sizeof(throttle_resp_t), slot); - - /* calculate the token increment per 100ms */ - throttle->token_inc = traffic_limit * HUNDRED_MS / ONE_SECOND; - if (req->preferred_chunk_size > throttle->token_inc) - req->preferred_chunk_size = throttle->token_inc; - - h2o_delete_header(&req->res.headers, xt_index); - - throttle->super.do_send = on_send; - throttle->super.stop = on_stop; - throttle->ctx = req->conn->ctx; - throttle->req = req; - throttle->state.bufs.capacity = 0; - throttle->state.bufs.size = 0; - throttle->timeout_entry = (h2o_timeout_entry_t){0}; - throttle->timeout_entry.cb = add_token; - throttle->tokens = throttle->token_inc; - slot = &throttle->super.next; - - h2o_timeout_link(throttle->ctx->loop, &throttle->ctx->hundred_ms_timeout, &throttle->timeout_entry); - -Next: - h2o_setup_next_ostream(req, slot); -} - -void h2o_throttle_resp_register(h2o_pathconf_t *pathconf) -{ - h2o_filter_t *self = h2o_create_filter(pathconf, sizeof(*self)); - self->on_setup_ostream = on_setup_ostream; -} |