1/* ==================================================================== 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 * ==================================================================== 19 */ 20 21#include <apr_pools.h> 22 23#include "serf.h" 24#include "serf_bucket_util.h" 25 26/* Older versions of APR do not have this macro. */ 27#ifdef APR_SIZE_MAX 28#define REQUESTED_MAX APR_SIZE_MAX 29#else 30#define REQUESTED_MAX (~((apr_size_t)0)) 31#endif 32 33 34typedef struct { 35 serf_bucket_t *stream; 36 apr_uint64_t remaining; 37} body_context_t; 38 39serf_bucket_t *serf_bucket_response_body_create( 40 serf_bucket_t *stream, apr_uint64_t len, serf_bucket_alloc_t *allocator) 41{ 42 body_context_t *ctx; 43 44 ctx = serf_bucket_mem_alloc(allocator, sizeof(*ctx)); 45 ctx->stream = stream; 46 ctx->remaining = len; 47 48 return serf_bucket_create(&serf_bucket_type_response_body, allocator, ctx); 49} 50 51static apr_status_t serf_response_body_read(serf_bucket_t *bucket, 52 apr_size_t requested, 53 const char **data, 54 apr_size_t *len) 55{ 56 body_context_t *ctx = bucket->data; 57 apr_status_t status; 58 59 if (!ctx->remaining) { 60 *len = 0; 61 return APR_EOF; 62 } 63 64 if (requested == SERF_READ_ALL_AVAIL || requested > ctx->remaining) { 65 if (ctx->remaining <= REQUESTED_MAX) { 66 requested = (apr_size_t) ctx->remaining; 67 } else { 68 requested = REQUESTED_MAX; 69 } 70 } 71 72 status = serf_bucket_read(ctx->stream, requested, data, len); 73 74 if (!SERF_BUCKET_READ_ERROR(status)) { 75 ctx->remaining -= *len; 76 } 77 78 if (APR_STATUS_IS_EOF(status) && ctx->remaining > 0) { 79 /* The server sent less data than expected. */ 80 status = SERF_ERROR_TRUNCATED_HTTP_RESPONSE; 81 } 82 83 return status; 84} 85 86static apr_status_t serf_response_body_readline(serf_bucket_t *bucket, 87 int acceptable, int *found, 88 const char **data, 89 apr_size_t *len) 90{ 91 body_context_t *ctx = bucket->data; 92 apr_status_t status; 93 94 if (!ctx->remaining) { 95 *len = 0; 96 return APR_EOF; 97 } 98 99 status = serf_bucket_readline(ctx->stream, acceptable, found, data, len); 100 101 if (!SERF_BUCKET_READ_ERROR(status)) { 102 ctx->remaining -= *len; 103 } 104 105 if (APR_STATUS_IS_EOF(status) && ctx->remaining > 0) { 106 /* The server sent less data than expected. */ 107 status = SERF_ERROR_TRUNCATED_HTTP_RESPONSE; 108 } 109 110 return status; 111} 112 113static apr_status_t serf_response_body_peek(serf_bucket_t *bucket, 114 const char **data, 115 apr_size_t *len) 116{ 117 body_context_t *ctx = bucket->data; 118 119 return serf_bucket_peek(ctx->stream, data, len); 120} 121 122static void serf_response_body_destroy(serf_bucket_t *bucket) 123{ 124 body_context_t *ctx = bucket->data; 125 126 serf_bucket_destroy(ctx->stream); 127 128 serf_default_destroy_and_data(bucket); 129} 130 131const serf_bucket_type_t serf_bucket_type_response_body = { 132 "RESPONSE_BODY", 133 serf_response_body_read, 134 serf_response_body_readline, 135 serf_default_read_iovec, 136 serf_default_read_for_sendfile, 137 serf_default_read_bucket, 138 serf_response_body_peek, 139 serf_response_body_destroy, 140}; 141