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[FreeBSD/releng/10.0.git] / contrib / serf / buckets / file_buckets.c
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 typedef struct {
22     apr_file_t *file;
23
24     serf_databuf_t databuf;
25
26 } file_context_t;
27
28
29 static apr_status_t file_reader(void *baton, apr_size_t bufsize,
30                                 char *buf, apr_size_t *len)
31 {
32     file_context_t *ctx = baton;
33
34     *len = bufsize;
35     return apr_file_read(ctx->file, buf, len);
36 }
37
38 serf_bucket_t *serf_bucket_file_create(
39     apr_file_t *file,
40     serf_bucket_alloc_t *allocator)
41 {
42     file_context_t *ctx;
43 #if APR_HAS_MMAP
44     apr_finfo_t finfo;
45     const char *file_path;
46
47     /* See if we'd be better off mmap'ing this file instead.
48      *
49      * Note that there is a failure case here that we purposely fall through:
50      * if a file is buffered, apr_mmap will reject it.  However, on older
51      * versions of APR, we have no way of knowing this - but apr_mmap_create
52      * will check for this and return APR_EBADF.
53      */
54     apr_file_name_get(&file_path, file);
55     apr_stat(&finfo, file_path, APR_FINFO_SIZE,
56              serf_bucket_allocator_get_pool(allocator));
57     if (APR_MMAP_CANDIDATE(finfo.size)) {
58         apr_status_t status;
59         apr_mmap_t *file_mmap;
60         status = apr_mmap_create(&file_mmap, file, 0, finfo.size,
61                                  APR_MMAP_READ,
62                                  serf_bucket_allocator_get_pool(allocator));
63
64         if (status == APR_SUCCESS) {
65             return serf_bucket_mmap_create(file_mmap, allocator);
66         }
67     }
68 #endif
69
70     /* Oh, well. */
71     ctx = serf_bucket_mem_alloc(allocator, sizeof(*ctx));
72     ctx->file = file;
73
74     serf_databuf_init(&ctx->databuf);
75     ctx->databuf.read = file_reader;
76     ctx->databuf.read_baton = ctx;
77
78     return serf_bucket_create(&serf_bucket_type_file, allocator, ctx);
79 }
80
81 static apr_status_t serf_file_read(serf_bucket_t *bucket,
82                                    apr_size_t requested,
83                                    const char **data, apr_size_t *len)
84 {
85     file_context_t *ctx = bucket->data;
86
87     return serf_databuf_read(&ctx->databuf, requested, data, len);
88 }
89
90 static apr_status_t serf_file_readline(serf_bucket_t *bucket,
91                                        int acceptable, int *found,
92                                        const char **data, apr_size_t *len)
93 {
94     file_context_t *ctx = bucket->data;
95
96     return serf_databuf_readline(&ctx->databuf, acceptable, found, data, len);
97 }
98
99 static apr_status_t serf_file_peek(serf_bucket_t *bucket,
100                                    const char **data,
101                                    apr_size_t *len)
102 {
103     file_context_t *ctx = bucket->data;
104
105     return serf_databuf_peek(&ctx->databuf, data, len);
106 }
107
108 const serf_bucket_type_t serf_bucket_type_file = {
109     "FILE",
110     serf_file_read,
111     serf_file_readline,
112     serf_default_read_iovec,
113     serf_default_read_for_sendfile,
114     serf_default_read_bucket,
115     serf_file_peek,
116     serf_default_destroy_and_data,
117 };