133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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* ====================================================================
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*/
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#include <apr_pools.h>
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#include "serf.h"
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#include "serf_bucket_util.h"
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#include "serf_private.h"
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typedef struct {
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serf_bucket_t *stream;
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apr_uint64_t remaining;
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} limit_context_t;
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serf_bucket_t *serf_bucket_limit_create(
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serf_bucket_t *stream, apr_uint64_t len, serf_bucket_alloc_t *allocator)
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{
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limit_context_t *ctx;
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ctx = serf_bucket_mem_alloc(allocator, sizeof(*ctx));
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ctx->stream = stream;
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ctx->remaining = len;
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return serf_bucket_create(&serf_bucket_type_limit, allocator, ctx);
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}
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static apr_status_t serf_limit_read(serf_bucket_t *bucket,
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apr_size_t requested,
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const char **data, apr_size_t *len)
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{
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limit_context_t *ctx = bucket->data;
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apr_status_t status;
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if (!ctx->remaining) {
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*len = 0;
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return APR_EOF;
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}
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if (requested == SERF_READ_ALL_AVAIL || requested > ctx->remaining) {
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if (ctx->remaining <= REQUESTED_MAX) {
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requested = (apr_size_t) ctx->remaining;
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} else {
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requested = REQUESTED_MAX;
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}
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}
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status = serf_bucket_read(ctx->stream, requested, data, len);
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if (!SERF_BUCKET_READ_ERROR(status)) {
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ctx->remaining -= *len;
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}
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/* If we have met our limit and don't have a status, return EOF. */
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if (!ctx->remaining && !status) {
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status = APR_EOF;
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}
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return status;
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}
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static apr_status_t serf_limit_readline(serf_bucket_t *bucket,
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int acceptable, int *found,
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const char **data, apr_size_t *len)
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{
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limit_context_t *ctx = bucket->data;
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apr_status_t status;
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if (!ctx->remaining) {
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*len = 0;
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return APR_EOF;
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}
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status = serf_bucket_readline(ctx->stream, acceptable, found, data, len);
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if (!SERF_BUCKET_READ_ERROR(status)) {
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ctx->remaining -= *len;
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}
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/* If we have met our limit and don't have a status, return EOF. */
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if (!ctx->remaining && !status) {
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status = APR_EOF;
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}
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return status;
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}
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static apr_status_t serf_limit_peek(serf_bucket_t *bucket,
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const char **data,
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apr_size_t *len)
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{
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limit_context_t *ctx = bucket->data;
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return serf_bucket_peek(ctx->stream, data, len);
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}
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static void serf_limit_destroy(serf_bucket_t *bucket)
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{
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limit_context_t *ctx = bucket->data;
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serf_bucket_destroy(ctx->stream);
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serf_default_destroy_and_data(bucket);
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}
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const serf_bucket_type_t serf_bucket_type_limit = {
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"LIMIT",
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serf_limit_read,
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serf_limit_readline,
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serf_default_read_iovec,
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serf_default_read_for_sendfile,
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serf_default_read_bucket,
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serf_limit_peek,
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serf_limit_destroy,
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};
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