| /* |
| * eagain_bucket.c : a serf bucket that handles slowing down data |
| * for specific readers that would have unwanted |
| * behavior if they read everything too fast |
| * ==================================================================== |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * ==================================================================== |
| */ |
| |
| #include <serf.h> |
| #include <serf_bucket_util.h> |
| |
| #include "svn_private_config.h" |
| |
| #include "ra_serf.h" |
| |
| typedef struct eagain_baton_t |
| { |
| const char *data; |
| apr_size_t remaining; |
| } eagain_baton_t; |
| |
| static apr_status_t |
| eagain_bucket_read(serf_bucket_t *bucket, |
| apr_size_t requested, |
| const char **data, |
| apr_size_t *len) |
| { |
| eagain_baton_t *eab = bucket->data; |
| |
| if (eab->remaining > 0) |
| { |
| *data = eab->data; |
| if (requested > eab->remaining || requested == SERF_READ_ALL_AVAIL) |
| { |
| *len = eab->remaining; |
| eab->data = NULL; |
| eab->remaining = 0; |
| } |
| else |
| { |
| *len = requested; |
| eab->data += requested; |
| eab->remaining -= requested; |
| } |
| |
| if (eab->remaining) |
| return APR_SUCCESS; |
| } |
| |
| return APR_EAGAIN; |
| } |
| |
| #if !SERF_VERSION_AT_LEAST(1, 4, 0) |
| static apr_status_t |
| eagain_bucket_readline(serf_bucket_t *bucket, |
| int acceptable, |
| int *found, |
| const char **data, |
| apr_size_t *len) |
| { |
| /* ### for now, we know callers won't use this function. */ |
| svn_error_clear(svn_error__malfunction(TRUE, __FILE__, __LINE__, |
| "Not implemented.")); |
| return APR_ENOTIMPL; |
| } |
| #endif |
| |
| |
| static apr_status_t |
| eagain_bucket_peek(serf_bucket_t *bucket, |
| const char **data, |
| apr_size_t *len) |
| { |
| const eagain_baton_t *eab = bucket->data; |
| |
| *data = eab->data ? eab->data : ""; |
| *len = eab->remaining; |
| |
| return APR_SUCCESS; |
| } |
| |
| |
| static const serf_bucket_type_t delay_bucket_vtable = { |
| "BUF-EAGAIN", |
| eagain_bucket_read, |
| #if SERF_VERSION_AT_LEAST(1, 4, 0) |
| serf_default_readline, |
| #else |
| eagain_bucket_readline, |
| #endif |
| serf_default_read_iovec, |
| serf_default_read_for_sendfile, |
| serf_default_read_bucket, |
| eagain_bucket_peek, |
| serf_default_destroy_and_data, |
| }; |
| |
| |
| serf_bucket_t * |
| svn_ra_serf__create_bucket_with_eagain(const char *data, |
| apr_size_t len, |
| serf_bucket_alloc_t *allocator) |
| { |
| eagain_baton_t *eab; |
| |
| eab = serf_bucket_mem_alloc(allocator, sizeof(*eab)); |
| eab->data = data; |
| eab->remaining = len; |
| |
| return serf_bucket_create(&delay_bucket_vtable, allocator, eab); |
| } |