Fixes for Fedora 17.
[m6w6/libmemcached] / libmemcached / touch.cc
1 /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
2 *
3 * Libmemcached library
4 *
5 * Copyright (C) 2011 Data Differential, http://datadifferential.com/
6 * Copyright (C) 2006-2009 Brian Aker All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
10 * met:
11 *
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * * Redistributions in binary form must reproduce the above
16 * copyright notice, this list of conditions and the following disclaimer
17 * in the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * * The names of its contributors may not be used to endorse or
21 * promote products derived from this software without specific prior
22 * written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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35 *
36 */
37
38 #include <libmemcached/common.h>
39 #include <libmemcached/memcached/protocol_binary.h>
40
41 static memcached_return_t ascii_touch(memcached_server_write_instance_st instance,
42 const char *key, size_t key_length,
43 time_t expiration)
44 {
45 char expiration_buffer[MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH +1];
46 int expiration_buffer_length= snprintf(expiration_buffer, sizeof(expiration_buffer), " %llu", (unsigned long long)expiration);
47 if (size_t(expiration_buffer_length) >= sizeof(expiration_buffer) or expiration_buffer_length < 0)
48 {
49 return memcached_set_error(*instance, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT,
50 memcached_literal_param("snprintf(MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH)"));
51 }
52
53 libmemcached_io_vector_st vector[]=
54 {
55 { NULL, 0 },
56 { memcached_literal_param("touch ") },
57 { memcached_array_string(instance->root->_namespace), memcached_array_size(instance->root->_namespace) },
58 { key, key_length },
59 { expiration_buffer, size_t(expiration_buffer_length) },
60 { memcached_literal_param("\r\n") }
61 };
62
63 memcached_return_t rc;
64 if (memcached_failed(rc= memcached_vdo(instance, vector, 6, true)))
65 {
66 memcached_io_reset(instance);
67 return memcached_set_error(*instance, MEMCACHED_WRITE_FAILURE, MEMCACHED_AT);
68 }
69
70 return rc;
71 }
72
73 static memcached_return_t binary_touch(memcached_server_write_instance_st instance,
74 const char *key, size_t key_length,
75 time_t expiration)
76 {
77 protocol_binary_request_touch request= {}; //{.bytes= {0}};
78 request.message.header.request.magic= PROTOCOL_BINARY_REQ;
79 request.message.header.request.opcode= PROTOCOL_BINARY_CMD_TOUCH;
80 request.message.header.request.extlen= 4;
81 request.message.header.request.keylen= htons((uint16_t)(key_length +memcached_array_size(instance->root->_namespace)));
82 request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
83 request.message.header.request.bodylen= htonl((uint32_t)(key_length +memcached_array_size(instance->root->_namespace) +request.message.header.request.extlen));
84 request.message.body.expiration= htonl((uint32_t) expiration);
85
86 libmemcached_io_vector_st vector[]=
87 {
88 { NULL, 0 },
89 { request.bytes, sizeof(request.bytes) },
90 { memcached_array_string(instance->root->_namespace), memcached_array_size(instance->root->_namespace) },
91 { key, key_length }
92 };
93
94 memcached_return_t rc;
95 if (memcached_failed(rc= memcached_vdo(instance, vector, 4, true)))
96 {
97 memcached_io_reset(instance);
98 return memcached_set_error(*instance, MEMCACHED_WRITE_FAILURE, MEMCACHED_AT);
99 }
100
101 return rc;
102 }
103
104 memcached_return_t memcached_touch(memcached_st *ptr,
105 const char *key, size_t key_length,
106 time_t expiration)
107 {
108 return memcached_touch_by_key(ptr, key, key_length, key, key_length, expiration);
109 }
110
111 memcached_return_t memcached_touch_by_key(memcached_st *ptr,
112 const char *group_key, size_t group_key_length,
113 const char *key, size_t key_length,
114 time_t expiration)
115 {
116 LIBMEMCACHED_MEMCACHED_TOUCH_START();
117
118 memcached_return_t rc;
119 if (memcached_failed(rc= initialize_query(ptr, true)))
120 {
121 return rc;
122 }
123
124 if (memcached_failed(rc= memcached_validate_key_length(key_length, ptr->flags.binary_protocol)))
125 {
126 return rc;
127 }
128
129 uint32_t server_key= memcached_generate_hash_with_redistribution(ptr, group_key, group_key_length);
130 memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, server_key);
131
132 if (ptr->flags.binary_protocol)
133 {
134 rc= binary_touch(instance, key, key_length, expiration);
135 }
136 else
137 {
138 rc= ascii_touch(instance, key, key_length, expiration);
139 }
140
141 if (memcached_failed(rc))
142 {
143 return memcached_set_error(*instance, rc, MEMCACHED_AT, memcached_literal_param("Error occcured while writing touch command to server"));
144 }
145
146 char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
147 rc= memcached_response(instance, buffer, sizeof(buffer), NULL);
148
149 if (rc == MEMCACHED_SUCCESS or rc == MEMCACHED_NOTFOUND)
150 {
151 return rc;
152 }
153
154 return memcached_set_error(*instance, rc, MEMCACHED_AT, memcached_literal_param("Error occcured while reading response"));
155 }