response_body_buckets.c revision 251877
1/* Copyright 2002-2004 Justin Erenkrantz and Greg Stein 2 * 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16#include <apr_pools.h> 17 18#include "serf.h" 19#include "serf_bucket_util.h" 20 21/* Older versions of APR do not have this macro. */ 22#ifdef APR_SIZE_MAX 23#define REQUESTED_MAX APR_SIZE_MAX 24#else 25#define REQUESTED_MAX (~((apr_size_t)0)) 26#endif 27 28 29typedef struct { 30 serf_bucket_t *stream; 31 apr_uint64_t remaining; 32} body_context_t; 33 34serf_bucket_t *serf_bucket_response_body_create( 35 serf_bucket_t *stream, apr_uint64_t len, serf_bucket_alloc_t *allocator) 36{ 37 body_context_t *ctx; 38 39 ctx = serf_bucket_mem_alloc(allocator, sizeof(*ctx)); 40 ctx->stream = stream; 41 ctx->remaining = len; 42 43 return serf_bucket_create(&serf_bucket_type_response_body, allocator, ctx); 44} 45 46static apr_status_t serf_response_body_read(serf_bucket_t *bucket, 47 apr_size_t requested, 48 const char **data, 49 apr_size_t *len) 50{ 51 body_context_t *ctx = bucket->data; 52 apr_status_t status; 53 54 if (!ctx->remaining) { 55 *len = 0; 56 return APR_EOF; 57 } 58 59 if (requested == SERF_READ_ALL_AVAIL || requested > ctx->remaining) { 60 if (ctx->remaining <= REQUESTED_MAX) { 61 requested = (apr_size_t) ctx->remaining; 62 } else { 63 requested = REQUESTED_MAX; 64 } 65 } 66 67 status = serf_bucket_read(ctx->stream, requested, data, len); 68 69 if (!SERF_BUCKET_READ_ERROR(status)) { 70 ctx->remaining -= *len; 71 } 72 73 if (APR_STATUS_IS_EOF(status) && ctx->remaining > 0) { 74 /* The server sent less data than expected. */ 75 status = SERF_ERROR_TRUNCATED_HTTP_RESPONSE; 76 } 77 78 return status; 79} 80 81static apr_status_t serf_response_body_readline(serf_bucket_t *bucket, 82 int acceptable, int *found, 83 const char **data, 84 apr_size_t *len) 85{ 86 body_context_t *ctx = bucket->data; 87 apr_status_t status; 88 89 if (!ctx->remaining) { 90 *len = 0; 91 return APR_EOF; 92 } 93 94 status = serf_bucket_readline(ctx->stream, acceptable, found, data, len); 95 96 if (!SERF_BUCKET_READ_ERROR(status)) { 97 ctx->remaining -= *len; 98 } 99 100 if (APR_STATUS_IS_EOF(status) && ctx->remaining > 0) { 101 /* The server sent less data than expected. */ 102 status = SERF_ERROR_TRUNCATED_HTTP_RESPONSE; 103 } 104 105 return status; 106} 107 108static apr_status_t serf_response_body_peek(serf_bucket_t *bucket, 109 const char **data, 110 apr_size_t *len) 111{ 112 body_context_t *ctx = bucket->data; 113 114 return serf_bucket_peek(ctx->stream, data, len); 115} 116 117static void serf_response_body_destroy(serf_bucket_t *bucket) 118{ 119 body_context_t *ctx = bucket->data; 120 121 serf_bucket_destroy(ctx->stream); 122 123 serf_default_destroy_and_data(bucket); 124} 125 126const serf_bucket_type_t serf_bucket_type_response_body = { 127 "RESPONSE_BODY", 128 serf_response_body_read, 129 serf_response_body_readline, 130 serf_default_read_iovec, 131 serf_default_read_for_sendfile, 132 serf_default_read_bucket, 133 serf_response_body_peek, 134 serf_response_body_destroy, 135}; 136