Mercurial > dovecot > original-hg > dovecot-1.2
annotate src/lib-dict/dict-client.c @ 4385:2c4a39afea07 HEAD
Fixes
| author | Timo Sirainen <tss@iki.fi> |
|---|---|
| date | Fri, 16 Jun 2006 14:42:59 +0300 |
| parents | 51a1d0fbbc94 |
| children | b5d4c1e9a492 |
| rev | line source |
|---|---|
| 3793 | 1 /* Copyright (C) 2005 Timo Sirainen */ |
| 2 | |
| 3 #include "lib.h" | |
| 4 #include "str.h" | |
| 5 #include "network.h" | |
| 6 #include "istream.h" | |
| 7 #include "ostream.h" | |
| 8 #include "dict-private.h" | |
| 9 #include "dict-client.h" | |
| 10 | |
| 11 #include <unistd.h> | |
| 12 #include <fcntl.h> | |
| 13 | |
| 14 struct client_dict { | |
| 15 struct dict dict; | |
| 16 | |
| 17 pool_t pool; | |
| 18 int fd; | |
| 19 const char *uri; | |
| 20 const char *username; | |
| 21 const char *path; | |
| 22 | |
| 23 struct istream *input; | |
| 24 struct ostream *output; | |
| 25 | |
| 26 unsigned int connect_counter; | |
| 27 unsigned int transaction_id_counter; | |
| 28 | |
| 29 unsigned int in_iteration:1; | |
| 30 unsigned int handshaked:1; | |
| 31 }; | |
| 32 | |
| 33 struct client_dict_iterate_context { | |
| 34 struct dict_iterate_context ctx; | |
| 35 | |
| 36 pool_t pool; | |
|
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parents:
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changeset
|
37 bool failed; |
| 3793 | 38 }; |
| 39 | |
| 40 struct client_dict_transaction_context { | |
| 41 struct dict_transaction_context ctx; | |
| 42 | |
| 43 unsigned int id; | |
| 44 unsigned int connect_counter; | |
| 45 | |
|
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Added "bool" type and changed all ints that were used as booleans to bool.
Timo Sirainen <tss@iki.fi>
parents:
3858
diff
changeset
|
46 bool failed; |
| 3793 | 47 }; |
| 48 | |
| 49 static int client_dict_connect(struct client_dict *dict); | |
| 50 static void client_dict_disconnect(struct client_dict *dict); | |
| 51 | |
| 52 const char *dict_client_escape(const char *src) | |
| 53 { | |
| 54 const char *p; | |
| 55 string_t *dest; | |
| 56 | |
| 57 /* first do a quick lookup to see if there's anything to escape. | |
| 58 probably not. */ | |
| 59 for (p = src; *p != '\0'; p++) { | |
| 60 if (*p == '\t' || *p == '\n' || *p == '\001') | |
| 61 break; | |
| 62 } | |
| 63 | |
| 64 if (*p == '\0') | |
| 65 return src; | |
| 66 | |
| 67 dest = t_str_new(256); | |
| 68 str_append_n(dest, src, p - src); | |
| 69 | |
| 3858 | 70 for (; *p != '\0'; p++) { |
| 3793 | 71 switch (*p) { |
| 72 case '\t': | |
| 73 str_append_c(dest, '\001'); | |
| 74 str_append_c(dest, 't'); | |
| 75 break; | |
| 76 case '\n': | |
| 77 str_append_c(dest, '\001'); | |
| 78 str_append_c(dest, 'n'); | |
| 79 break; | |
| 80 case '\001': | |
| 81 str_append_c(dest, '\001'); | |
| 82 str_append_c(dest, '1'); | |
| 83 break; | |
| 84 default: | |
| 85 str_append_c(dest, *p); | |
| 86 break; | |
| 87 } | |
| 88 } | |
| 89 return str_c(dest); | |
| 90 } | |
| 91 | |
| 92 const char *dict_client_unescape(const char *src) | |
| 93 { | |
| 94 const char *p; | |
| 95 string_t *dest; | |
| 96 | |
| 97 /* first do a quick lookup to see if there's anything to unescape. | |
| 98 probably not. */ | |
| 99 for (p = src; *p != '\0'; p++) { | |
| 100 if (*p == '\001') | |
| 101 break; | |
| 102 } | |
| 103 | |
| 104 if (*p == '\0') | |
| 105 return src; | |
| 106 | |
| 107 dest = t_str_new(256); | |
| 108 str_append_n(dest, src, p - src); | |
| 109 for (; *p != '\0'; p++) { | |
| 110 if (*p != '\001') | |
| 111 str_append_c(dest, *p); | |
| 112 else if (p[1] != '\0') { | |
| 113 p++; | |
| 114 switch (*p) { | |
| 115 case '1': | |
| 116 str_append_c(dest, '\001'); | |
| 117 break; | |
| 118 case 't': | |
| 119 str_append_c(dest, '\t'); | |
| 120 break; | |
| 121 case 'n': | |
| 122 str_append_c(dest, '\n'); | |
| 123 break; | |
| 124 } | |
| 125 } | |
| 126 } | |
| 127 return str_c(dest); | |
| 128 } | |
| 129 | |
| 130 static int client_dict_send_query(struct client_dict *dict, const char *query) | |
| 131 { | |
| 4368 | 132 if (dict->output == NULL) { |
| 133 /* not connected currently */ | |
| 134 if (client_dict_connect(dict) < 0) | |
| 135 return -1; | |
| 136 } | |
| 137 | |
| 3793 | 138 if (o_stream_send_str(dict->output, query) < 0 || |
| 139 o_stream_flush(dict->output) < 0) { | |
| 140 /* Send failed */ | |
| 141 if (!dict->handshaked) { | |
| 142 /* we're trying to send hello, don't try to reconnect */ | |
| 143 return -1; | |
| 144 } | |
| 145 | |
| 146 /* Reconnect and try again. */ | |
| 147 client_dict_disconnect(dict); | |
| 148 if (client_dict_connect(dict) < 0) | |
| 149 return -1; | |
| 150 | |
| 151 if (o_stream_send_str(dict->output, query) < 0 || | |
| 152 o_stream_flush(dict->output) < 0) { | |
| 153 i_error("write(%s) failed: %m", dict->path); | |
| 154 return -1; | |
| 155 } | |
| 156 } | |
| 157 return 0; | |
| 158 } | |
| 159 | |
| 4368 | 160 static int |
| 161 client_dict_send_transaction_query(struct client_dict_transaction_context *ctx, | |
| 162 const char *query) | |
| 163 { | |
| 164 struct client_dict *dict = (struct client_dict *)ctx->ctx.dict; | |
| 165 | |
| 4385 | 166 if (ctx->connect_counter != dict->connect_counter || ctx->failed) |
| 167 return -1; | |
| 168 | |
| 169 if (dict->output == NULL) { | |
| 170 /* not connected currently */ | |
| 171 if (client_dict_connect(dict) < 0) | |
| 172 return -1; | |
| 173 } | |
| 174 | |
| 4368 | 175 if (o_stream_send_str(dict->output, query) < 0 || |
| 176 o_stream_flush(dict->output) < 0) { | |
| 177 /* Send failed. Our transactions have died, so don't even try | |
| 178 to re-send the command */ | |
| 179 ctx->failed = TRUE; | |
| 180 client_dict_disconnect(dict); | |
| 181 return -1; | |
| 182 } | |
| 183 return 0; | |
| 184 } | |
| 185 | |
| 3793 | 186 static char *client_dict_read_line(struct client_dict *dict) |
| 187 { | |
| 188 char *line; | |
| 189 int ret; | |
| 190 | |
| 191 line = NULL; | |
| 192 while ((ret = i_stream_read(dict->input)) > 0) { | |
| 193 line = i_stream_next_line(dict->input); | |
| 194 if (line != NULL) | |
| 195 return line; | |
| 196 } | |
| 197 | |
| 198 i_error("read(%s) failed: %m", dict->path); | |
| 199 return NULL; | |
| 200 } | |
| 201 | |
| 202 static int client_dict_connect(struct client_dict *dict) | |
| 203 { | |
| 204 const char *query; | |
| 205 | |
| 206 i_assert(dict->fd == -1); | |
| 207 | |
| 208 dict->fd = net_connect_unix(dict->path); | |
| 209 if (dict->fd == -1) { | |
| 210 i_error("net_connect_unix(%s) failed: %m", dict->path); | |
| 211 return -1; | |
| 212 } | |
| 213 | |
| 214 /* Dictionary lookups are blocking */ | |
| 215 net_set_nonblock(dict->fd, FALSE); | |
| 216 | |
| 217 dict->input = i_stream_create_file(dict->fd, default_pool, | |
| 218 (size_t)-1, FALSE); | |
| 219 dict->output = o_stream_create_file(dict->fd, default_pool, | |
| 220 4096, FALSE); | |
| 221 dict->transaction_id_counter = 0; | |
| 222 | |
| 223 t_push(); | |
| 3852 | 224 query = t_strdup_printf("%c%u\t%u\t%s\t%s\n", DICT_PROTOCOL_CMD_HELLO, |
| 3793 | 225 DICT_CLIENT_PROTOCOL_MAJOR_VERSION, |
| 226 DICT_CLIENT_PROTOCOL_MINOR_VERSION, | |
| 227 dict->username, dict->uri); | |
| 228 if (client_dict_send_query(dict, query) < 0) { | |
| 229 client_dict_disconnect(dict); | |
|
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t_pop() calls were missing from some error handling paths
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230 t_pop(); |
| 3793 | 231 return -1; |
| 232 } | |
| 233 t_pop(); | |
| 234 | |
| 235 dict->handshaked = TRUE; | |
| 236 return 0; | |
| 237 } | |
| 238 | |
| 239 static void client_dict_disconnect(struct client_dict *dict) | |
| 240 { | |
| 241 dict->connect_counter++; | |
| 242 dict->handshaked = FALSE; | |
| 243 | |
|
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244 if (dict->input != NULL) |
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245 i_stream_destroy(&dict->input); |
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deinit, unref, destroy, close, free, etc. functions now take a pointer to
Timo Sirainen <tss@iki.fi>
parents:
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diff
changeset
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246 if (dict->output != NULL) |
|
4070
71b8faa84ec6
Added i_stream_destroy() and o_stream_destroy() and used them instead of
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parents:
3990
diff
changeset
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247 o_stream_destroy(&dict->output); |
| 3793 | 248 |
| 249 if (dict->fd != -1) { | |
| 250 if (close(dict->fd) < 0) | |
| 251 i_error("close(%s) failed: %m", dict->path); | |
| 252 dict->fd = -1; | |
| 253 } | |
| 254 } | |
| 255 | |
|
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256 static struct dict *client_dict_init(struct dict *dict_class, const char *uri, |
|
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parents:
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257 const char *username) |
| 3793 | 258 { |
| 259 struct client_dict *dict; | |
|
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parents:
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260 const char *dest_uri; |
| 3793 | 261 pool_t pool; |
| 262 | |
|
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parents:
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changeset
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263 /* uri = [<path>] ":" <uri> */ |
| 3793 | 264 dest_uri = strchr(uri, ':'); |
| 265 if (dest_uri == NULL) { | |
| 266 i_error("dict-client: Invalid URI: %s", uri); | |
| 267 return NULL; | |
| 268 } | |
| 269 | |
| 270 pool = pool_alloconly_create("client dict", 1024); | |
| 271 dict = p_new(pool, struct client_dict, 1); | |
| 272 dict->pool = pool; | |
| 273 dict->dict = *dict_class; | |
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274 dict->username = p_strdup(pool, username); |
| 3793 | 275 |
| 276 dict->fd = -1; | |
| 277 | |
|
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278 if (*uri != ':') { |
| 3793 | 279 /* path given */ |
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parents:
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changeset
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280 dict->path = p_strdup_until(pool, uri, dest_uri); |
| 3793 | 281 } else { |
| 282 dict->path = DEFAULT_DICT_SERVER_SOCKET_PATH; | |
| 283 } | |
| 284 dict->uri = p_strdup(pool, dest_uri + 1); | |
| 285 | |
| 286 (void)client_dict_connect(dict); | |
| 287 return &dict->dict; | |
| 288 } | |
| 289 | |
| 290 static void client_dict_deinit(struct dict *_dict) | |
| 291 { | |
| 292 struct client_dict *dict = (struct client_dict *)_dict; | |
| 293 | |
| 294 client_dict_disconnect(dict); | |
| 295 pool_unref(dict->pool); | |
| 296 } | |
| 297 | |
| 298 static int client_dict_lookup(struct dict *_dict, pool_t pool, | |
| 299 const char *key, const char **value_r) | |
| 300 { | |
| 301 struct client_dict *dict = (struct client_dict *)_dict; | |
| 302 const char *line; | |
| 303 | |
| 304 if (dict->fd == -1) | |
| 305 return -1; | |
| 306 | |
| 307 t_push(); | |
| 308 line = t_strdup_printf("%c%s\n", DICT_PROTOCOL_CMD_LOOKUP, | |
| 309 dict_client_escape(key)); | |
| 310 if (client_dict_send_query(dict, line) < 0) { | |
| 311 t_pop(); | |
| 312 return -1; | |
| 313 } | |
| 314 t_pop(); | |
| 315 | |
| 316 /* read reply */ | |
| 317 line = client_dict_read_line(dict); | |
| 318 if (line == NULL) | |
| 319 return -1; | |
| 320 | |
| 321 if (*line == DICT_PROTOCOL_REPLY_OK) { | |
| 322 *value_r = p_strdup(pool, dict_client_unescape(line + 1)); | |
| 323 return 1; | |
| 324 } else { | |
| 325 *value_r = NULL; | |
| 326 return *line == DICT_PROTOCOL_REPLY_NOTFOUND ? 0 : -1; | |
| 327 } | |
| 328 } | |
| 329 | |
| 330 static struct dict_iterate_context * | |
|
3863
55df57c028d4
Added "bool" type and changed all ints that were used as booleans to bool.
Timo Sirainen <tss@iki.fi>
parents:
3858
diff
changeset
|
331 client_dict_iterate_init(struct dict *_dict, const char *path, bool recurse) |
| 3793 | 332 { |
| 333 struct client_dict *dict = (struct client_dict *)_dict; | |
| 334 struct client_dict_iterate_context *ctx; | |
| 335 const char *query; | |
| 336 | |
| 337 if (dict->in_iteration) | |
| 338 i_panic("dict-client: Only one iteration supported"); | |
| 339 dict->in_iteration = TRUE; | |
| 340 | |
| 341 ctx = i_new(struct client_dict_iterate_context, 1); | |
| 342 ctx->ctx.dict = _dict; | |
| 343 ctx->pool = pool_alloconly_create("client dict iteration", 512); | |
| 344 | |
| 345 t_push(); | |
| 346 query = t_strdup_printf("%c%d\t%s\n", DICT_PROTOCOL_CMD_ITERATE, | |
| 347 recurse, dict_client_escape(path)); | |
| 348 if (client_dict_send_query(dict, query) < 0) | |
| 349 ctx->failed = TRUE; | |
| 350 t_pop(); | |
| 351 | |
| 352 return &ctx->ctx; | |
| 353 } | |
| 354 | |
| 355 static int client_dict_iterate(struct dict_iterate_context *_ctx, | |
| 356 const char **key_r, const char **value_r) | |
| 357 { | |
| 358 struct client_dict_iterate_context *ctx = | |
| 359 (struct client_dict_iterate_context *)_ctx; | |
| 360 struct client_dict *dict = (struct client_dict *)_ctx->dict; | |
| 361 char *line, *value; | |
| 362 | |
| 363 if (ctx->failed) | |
| 364 return -1; | |
| 365 | |
| 366 /* read next reply */ | |
| 367 line = client_dict_read_line(dict); | |
| 368 if (line == NULL) | |
| 369 return -1; | |
| 370 | |
| 371 if (*line == '\0') { | |
| 372 /* end of iteration */ | |
| 373 return 0; | |
| 374 } | |
| 375 | |
| 376 /* line contains key \t value */ | |
| 377 p_clear(ctx->pool); | |
| 378 | |
| 379 value = strchr(line, '\t'); | |
| 380 if (value == NULL) { | |
| 381 /* broken protocol */ | |
| 382 i_error("dict client (%s) sent broken reply", dict->path); | |
| 383 return -1; | |
| 384 } | |
| 385 *value++ = '\0'; | |
| 386 | |
| 387 *key_r = p_strdup(ctx->pool, dict_client_unescape(line)); | |
| 388 *value_r = p_strdup(ctx->pool, dict_client_unescape(value)); | |
| 389 return 1; | |
| 390 } | |
| 391 | |
| 392 static void client_dict_iterate_deinit(struct dict_iterate_context *_ctx) | |
| 393 { | |
| 394 struct client_dict *dict = (struct client_dict *)_ctx->dict; | |
| 395 struct client_dict_iterate_context *ctx = | |
| 396 (struct client_dict_iterate_context *)_ctx; | |
| 397 | |
| 398 pool_unref(ctx->pool); | |
| 399 i_free(ctx); | |
| 400 dict->in_iteration = TRUE; | |
| 401 } | |
| 402 | |
| 403 static struct dict_transaction_context * | |
| 404 client_dict_transaction_init(struct dict *_dict) | |
| 405 { | |
| 406 struct client_dict *dict = (struct client_dict *)_dict; | |
| 407 struct client_dict_transaction_context *ctx; | |
| 4368 | 408 const char *query; |
| 3793 | 409 |
| 410 ctx = i_new(struct client_dict_transaction_context, 1); | |
| 411 ctx->ctx.dict = _dict; | |
| 412 ctx->id = ++dict->transaction_id_counter; | |
| 4368 | 413 |
| 414 t_push(); | |
| 415 query = t_strdup_printf("%c%u\n", DICT_PROTOCOL_CMD_BEGIN, ctx->id); | |
| 416 if (client_dict_send_query(dict, query) < 0) | |
| 417 ctx->failed = TRUE; | |
| 418 else | |
| 419 ctx->connect_counter = dict->connect_counter; | |
| 420 t_pop(); | |
| 421 | |
| 3793 | 422 return &ctx->ctx; |
| 423 } | |
| 424 | |
| 425 static int client_dict_transaction_commit(struct dict_transaction_context *_ctx) | |
| 426 { | |
| 427 struct client_dict_transaction_context *ctx = | |
| 428 (struct client_dict_transaction_context *)_ctx; | |
| 429 struct client_dict *dict = (struct client_dict *)_ctx->dict; | |
| 430 const char *query, *line; | |
| 431 int ret = ctx->failed ? -1 : 0; | |
| 432 | |
| 4385 | 433 t_push(); |
| 434 query = t_strdup_printf("%c%u\n", !ctx->failed ? | |
| 435 DICT_PROTOCOL_CMD_COMMIT : | |
| 436 DICT_PROTOCOL_CMD_ROLLBACK, ctx->id); | |
| 437 if (client_dict_send_transaction_query(ctx, query) < 0) | |
| 3793 | 438 ret = -1; |
| 4385 | 439 else if (ret == 0) { |
| 440 /* read reply */ | |
| 441 line = client_dict_read_line(dict); | |
| 442 if (line == NULL || *line != DICT_PROTOCOL_REPLY_OK) | |
| 3793 | 443 ret = -1; |
| 4385 | 444 } |
| 3793 | 445 |
| 4385 | 446 t_pop(); |
| 3793 | 447 i_free(ctx); |
| 448 | |
| 449 return ret; | |
| 450 } | |
| 451 | |
| 452 static void | |
| 453 client_dict_transaction_rollback(struct dict_transaction_context *_ctx) | |
| 454 { | |
| 455 struct client_dict_transaction_context *ctx = | |
| 456 (struct client_dict_transaction_context *)_ctx; | |
| 457 const char *query; | |
| 458 | |
| 4385 | 459 t_push(); |
| 460 query = t_strdup_printf("%c%u\n", DICT_PROTOCOL_CMD_ROLLBACK, ctx->id); | |
| 461 (void)client_dict_send_transaction_query(ctx, query); | |
| 462 t_pop(); | |
| 463 | |
| 3793 | 464 i_free(ctx); |
| 465 } | |
| 466 | |
| 467 static void client_dict_set(struct dict_transaction_context *_ctx, | |
| 468 const char *key, const char *value) | |
| 469 { | |
| 470 struct client_dict_transaction_context *ctx = | |
| 471 (struct client_dict_transaction_context *)_ctx; | |
| 472 const char *query; | |
| 473 | |
| 474 t_push(); | |
|
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parents:
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diff
changeset
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475 query = t_strdup_printf("%c%u\t%s\t%s\n", |
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parents:
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476 DICT_PROTOCOL_CMD_SET, ctx->id, |
| 3793 | 477 dict_client_escape(key), |
| 478 dict_client_escape(value)); | |
| 4368 | 479 (void)client_dict_send_transaction_query(ctx, query); |
| 3793 | 480 t_pop(); |
| 481 } | |
| 482 | |
| 483 static void client_dict_atomic_inc(struct dict_transaction_context *_ctx, | |
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484 const char *key, long long diff) |
| 3793 | 485 { |
| 486 struct client_dict_transaction_context *ctx = | |
| 487 (struct client_dict_transaction_context *)_ctx; | |
| 488 const char *query; | |
| 489 | |
| 490 t_push(); | |
|
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491 query = t_strdup_printf("%c%u\t%s\t%lld\n", |
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492 DICT_PROTOCOL_CMD_ATOMIC_INC, |
| 3793 | 493 ctx->id, dict_client_escape(key), diff); |
| 4368 | 494 (void)client_dict_send_transaction_query(ctx, query); |
| 3793 | 495 t_pop(); |
| 496 } | |
| 497 | |
| 498 static struct dict client_dict = { | |
| 499 MEMBER(name) "proxy", | |
| 500 | |
| 501 { | |
| 502 client_dict_init, | |
| 503 client_dict_deinit, | |
| 504 client_dict_lookup, | |
| 505 client_dict_iterate_init, | |
| 506 client_dict_iterate, | |
| 507 client_dict_iterate_deinit, | |
| 508 client_dict_transaction_init, | |
| 509 client_dict_transaction_commit, | |
| 510 client_dict_transaction_rollback, | |
| 511 client_dict_set, | |
| 512 client_dict_atomic_inc | |
| 513 } | |
| 514 }; | |
| 515 | |
| 516 void dict_client_register(void) | |
| 517 { | |
| 518 dict_class_register(&client_dict); | |
| 519 } | |
| 520 | |
| 521 void dict_client_unregister(void) | |
| 522 { | |
| 523 dict_class_unregister(&client_dict); | |
| 524 } |