comparison: src/server/config/serverconfig.c
src/server/config/serverconfig.c
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- webdav
- changeset 259
- 0b8692959d37
- parent 258
- 134279e804b6
- child 269
- 3dfbd0b91950
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| 252:5653a9626cc0 | 259:0b8692959d37 |
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| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2020 Olaf Wintermann. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in the | |
| 14 * documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 26 * POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 | |
| 30 #include "serverconfig.h" | |
| 31 | |
| 32 #include <stdio.h> | |
| 33 #include <stdlib.h> | |
| 34 #include <string.h> | |
| 35 #include <ctype.h> | |
| 36 | |
| 37 #include <ucx/buffer.h> | |
| 38 #include <ucx/utils.h> | |
| 39 | |
| 40 ServerConfig* serverconfig_load(const char *file) { | |
| 41 FILE *in = fopen(file, "r"); | |
| 42 if(in == NULL) { | |
| 43 return NULL; | |
| 44 } | |
| 45 | |
| 46 UcxBuffer *buf = ucx_buffer_new(NULL, 4096, UCX_BUFFER_AUTOEXTEND); | |
| 47 if(!buf) { | |
| 48 fclose(in); | |
| 49 return NULL; | |
| 50 } | |
| 51 | |
| 52 ucx_stream_copy(in, buf, (read_func)fread, (write_func)ucx_buffer_write); | |
| 53 fclose(in); | |
| 54 | |
| 55 ServerConfig *scfg = serverconfig_parse(scstrn(buf->space, buf->size)); | |
| 56 | |
| 57 ucx_buffer_free(buf); | |
| 58 return scfg; | |
| 59 } | |
| 60 | |
| 61 | |
| 62 static CFGToken get_next_token(scstr_t content, int *pos) { | |
| 63 CFGToken token = { {NULL, 0}, CFG_NO_TOKEN }; | |
| 64 CFGTokenType type = CFG_TOKEN; | |
| 65 | |
| 66 int start = *pos; | |
| 67 | |
| 68 int token_begin = -1; | |
| 69 int token_end = content.length-1; | |
| 70 | |
| 71 int quote = 0; | |
| 72 int comment = 0; | |
| 73 | |
| 74 int i; | |
| 75 char prev = 0; | |
| 76 for(i=start;i<content.length;i++) { | |
| 77 char c = content.ptr[i]; | |
| 78 if(c == '\n') { | |
| 79 if(quote) { | |
| 80 *pos = i; | |
| 81 return token; // error | |
| 82 } else if(start == i) { | |
| 83 // single newline char token | |
| 84 type = CFG_TOKEN_NEWLINE; | |
| 85 token_begin = i; | |
| 86 token_end = i+1; | |
| 87 break; | |
| 88 } | |
| 89 | |
| 90 token_end = i; | |
| 91 if(token_begin < 0) { | |
| 92 // only space/comment token | |
| 93 token_begin = start; | |
| 94 type = comment ? CFG_TOKEN_COMMENT : CFG_TOKEN_SPACE; | |
| 95 } | |
| 96 // make sure next run will return current newline char as token | |
| 97 i--; | |
| 98 break; | |
| 99 } else if(quote) { | |
| 100 if(c == '"' && prev != '\\') { | |
| 101 quote = 0; | |
| 102 } | |
| 103 } else if(comment) { | |
| 104 // ignore | |
| 105 if(c == '\n') { | |
| 106 comment = 0; | |
| 107 } | |
| 108 } else if(c == '#') { | |
| 109 comment = 1; | |
| 110 } else if(isspace(c)) { | |
| 111 if(token_begin >= 0) { | |
| 112 token_end = i; | |
| 113 break; | |
| 114 } | |
| 115 } else if(c == '"') { | |
| 116 quote = 1; | |
| 117 if(token_begin < 0) { | |
| 118 token_begin = i; | |
| 119 } | |
| 120 } else if(token_begin < 0) { | |
| 121 token_begin = i; | |
| 122 } | |
| 123 prev = c; | |
| 124 } | |
| 125 | |
| 126 *pos = i + 1; | |
| 127 | |
| 128 if(token_begin < 0) { | |
| 129 return token; // error | |
| 130 } | |
| 131 | |
| 132 token.type = type; | |
| 133 token.content = scstrsubsl(content, token_begin, token_end - token_begin); | |
| 134 return token; | |
| 135 } | |
| 136 | |
| 137 /* | |
| 138 static void test_print_config(ConfigNode *parent) { | |
| 139 UCX_FOREACH(elm, parent->children) { | |
| 140 ConfigNode *node = elm->data; | |
| 141 | |
| 142 if(node->type == CONFIG_NODE_SPACE) { | |
| 143 printf("sp: %s", node->text_begin.ptr); | |
| 144 } else if(node->type == CONFIG_NODE_COMMENT) { | |
| 145 printf("cm: %s", node->text_begin.ptr); | |
| 146 } else if(node->type == CONFIG_NODE_OBJECT) { | |
| 147 printf("o{: %s : %s", node->name.ptr, node->text_begin.ptr); | |
| 148 test_print_config(node); | |
| 149 printf("o}: %s", node->text_end.ptr); | |
| 150 } else if(node->type == CONFIG_NODE_DIRECTIVE) { | |
| 151 printf("di: %s", node->text_begin.ptr); | |
| 152 } else { | |
| 153 printf("fk: %s", node->text_begin.ptr); | |
| 154 } | |
| 155 } | |
| 156 } | |
| 157 */ | |
| 158 | |
| 159 ServerConfig* serverconfig_parse(scstr_t content) { | |
| 160 UcxMempool *mp = ucx_mempool_new(512); | |
| 161 if(!mp) return NULL; | |
| 162 UcxAllocator *a = mp->allocator; | |
| 163 | |
| 164 ServerConfig *config = ucx_mempool_malloc(mp, sizeof(ServerConfig)); | |
| 165 if(!config) { | |
| 166 ucx_mempool_destroy(mp); | |
| 167 return NULL; | |
| 168 } | |
| 169 config->mp = mp; | |
| 170 | |
| 171 // PARSE: | |
| 172 // first non space/comment token is directive/object name | |
| 173 // following tokens are arguments | |
| 174 // newline starts new directive | |
| 175 // '{' converts directive to object and following directives will | |
| 176 // be placed into the object | |
| 177 int pos = 0; // needed for tokenizer | |
| 178 CFGToken token; | |
| 179 | |
| 180 ConfigNode *root_obj = ucx_mempool_calloc(mp, 1, sizeof(ConfigNode)); | |
| 181 root_obj->type = CONFIG_NODE_OBJECT; | |
| 182 | |
| 183 UcxList *node_stack = ucx_list_prepend(NULL, root_obj); | |
| 184 | |
| 185 ConfigNode *current = ucx_mempool_calloc(mp, 1, sizeof(ConfigNode)); | |
| 186 current->type = CONFIG_NODE_SPACE; | |
| 187 ConfigNode *obj = NULL; | |
| 188 int obj_closed = 0; | |
| 189 | |
| 190 int text_start = 0; | |
| 191 int err = 0; | |
| 192 while((token = get_next_token(content, &pos)).type != CFG_NO_TOKEN) { | |
| 193 //printf("%s [%.*s]\n", token_type_str(token.type), (int)token.content.length, token.content.ptr); | |
| 194 | |
| 195 switch(token.type) { | |
| 196 CFG_NO_TOKEN: break; | |
| 197 case CFG_TOKEN_COMMENT: { | |
| 198 if(current->type == CONFIG_NODE_SPACE) { | |
| 199 current->type = CONFIG_NODE_COMMENT; | |
| 200 } | |
| 201 break; | |
| 202 } | |
| 203 case CFG_TOKEN_SPACE: break; | |
| 204 case CFG_TOKEN_NEWLINE: { | |
| 205 scstr_t line = scstrsubsl(content, text_start, pos - text_start); | |
| 206 text_start = pos; | |
| 207 | |
| 208 sstr_t line_cp = sstrdup_a(a, line); | |
| 209 | |
| 210 ConfigNode *parent = node_stack->data; | |
| 211 if(current->type == CONFIG_NODE_CLOSE_OBJECT) { | |
| 212 parent->text_end = line_cp; | |
| 213 node_stack = ucx_list_remove_a(a, node_stack, node_stack); | |
| 214 } else if(current->type == CONFIG_NODE_OPEN_OBJECT) { | |
| 215 sstr_t new_textbegin = sstrcat_a(a, 2, obj->text_begin, line_cp); | |
| 216 alfree(a, obj->text_begin.ptr); | |
| 217 alfree(a, line_cp.ptr); | |
| 218 obj->text_begin = new_textbegin; | |
| 219 } else { | |
| 220 current->text_begin = line_cp; | |
| 221 ConfigNode *parent = node_stack->data; | |
| 222 parent->children = ucx_list_append_a(a, parent->children, current); | |
| 223 } | |
| 224 | |
| 225 if(obj && obj->type == CONFIG_NODE_OBJECT) { | |
| 226 node_stack = ucx_list_prepend_a(a, node_stack, obj); | |
| 227 obj = NULL; | |
| 228 } | |
| 229 | |
| 230 current = ucx_mempool_calloc(mp, 1, sizeof(ConfigNode)); | |
| 231 current->type = CONFIG_NODE_SPACE; | |
| 232 | |
| 233 obj_closed = 0; | |
| 234 break; | |
| 235 } | |
| 236 case CFG_TOKEN: { | |
| 237 if(!sstrcmp(token.content, S("{"))) { | |
| 238 if(!obj) { | |
| 239 err = 1; | |
| 240 break; | |
| 241 } | |
| 242 obj->type = CONFIG_NODE_OBJECT; | |
| 243 if(current != obj) { | |
| 244 current->type = CONFIG_NODE_OPEN_OBJECT; | |
| 245 } | |
| 246 } else if(!sstrcmp(token.content, S("}"))) { | |
| 247 obj_closed = 1; // force newline before next directive | |
| 248 obj = NULL; | |
| 249 current->type = CONFIG_NODE_CLOSE_OBJECT; | |
| 250 } else { | |
| 251 if(obj_closed) { | |
| 252 err = 1; | |
| 253 break; | |
| 254 } | |
| 255 | |
| 256 if(!current->name.ptr) { | |
| 257 current->name = sstrdup_a(a, token.content); | |
| 258 current->type = CONFIG_NODE_DIRECTIVE; | |
| 259 obj = current; | |
| 260 } else { | |
| 261 ConfigArg *arg = ucx_mempool_calloc(mp, 1, sizeof(ConfigArg)); | |
| 262 // TODO: add support for key/value | |
| 263 arg->value = sstrdup_a(a, token.content); | |
| 264 current->args = ucx_list_append_a(a, current->args, arg); | |
| 265 } | |
| 266 } | |
| 267 break; | |
| 268 } | |
| 269 } | |
| 270 | |
| 271 if(err) { | |
| 272 break; | |
| 273 } | |
| 274 } | |
| 275 | |
| 276 if(pos < content.length || err) { | |
| 277 // content not fully parsed because of an error | |
| 278 ucx_mempool_destroy(mp); | |
| 279 return NULL; | |
| 280 } | |
| 281 | |
| 282 //test_print_config(&root_obj); | |
| 283 config->root = root_obj; | |
| 284 config->tab = sstrdup_a(a, SC("\t")); | |
| 285 | |
| 286 return config; | |
| 287 } | |
| 288 | |
| 289 void serverconfig_free(ServerConfig *cfg) { | |
| 290 ucx_mempool_destroy(cfg->mp); | |
| 291 } | |
| 292 | |
| 293 ConfigNode* serverconfig_get_node(ConfigNode *parent, ConfigNodeType type, scstr_t name) { | |
| 294 UCX_FOREACH(elm, parent->children) { | |
| 295 ConfigNode *node = elm->data; | |
| 296 if(node->type == type && !sstrcmp(node->name, name)) { | |
| 297 return node; | |
| 298 } | |
| 299 } | |
| 300 return NULL; | |
| 301 } | |
| 302 | |
| 303 UcxList* serverconfig_get_node_list(ConfigNode *parent, ConfigNodeType type, scstr_t name) { | |
| 304 UcxList *nodes = NULL; | |
| 305 | |
| 306 UCX_FOREACH(elm, parent->children) { | |
| 307 ConfigNode *node = elm->data; | |
| 308 if(node->type == type && !sstrcmp(node->name, name)) { | |
| 309 nodes = ucx_list_append(nodes, node); | |
| 310 } | |
| 311 } | |
| 312 | |
| 313 return nodes; | |
| 314 } | |
| 315 | |
| 316 scstr_t serverconfig_directive_value(ConfigNode *obj, scstr_t name) { | |
| 317 ConfigNode *node = serverconfig_get_node(obj, CONFIG_NODE_DIRECTIVE, name); | |
| 318 if(node && ucx_list_size(node->args) == 1) { | |
| 319 ConfigArg *arg = node->args->data; | |
| 320 return SCSTR(arg->value); | |
| 321 } | |
| 322 return scstrn(NULL, 0); | |
| 323 } |
