Mercurial > hg > nginx
annotate src/http/modules/ngx_http_xslt_filter_module.c @ 3686:47c1a9bff989
use xmlSAXHandler._private field to store xslt filter context
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Mon, 12 Jul 2010 12:52:01 +0000 |
| parents | ac33852faaac |
| children | d620f497c50f |
| rev | line source |
|---|---|
| 2139 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 */ | |
| 5 | |
| 6 | |
| 7 #include <ngx_config.h> | |
| 8 #include <ngx_core.h> | |
| 9 #include <ngx_http.h> | |
| 10 | |
| 11 #include <libxml/parser.h> | |
| 12 #include <libxml/tree.h> | |
| 13 #include <libxslt/xslt.h> | |
| 14 #include <libxslt/xsltInternals.h> | |
| 15 #include <libxslt/transform.h> | |
| 16 #include <libxslt/xsltutils.h> | |
| 17 | |
| 2299 | 18 #if (NGX_HAVE_EXSLT) |
| 19 #include <libexslt/exslt.h> | |
| 20 #endif | |
| 21 | |
| 2139 | 22 |
| 23 #ifndef NGX_HTTP_XSLT_REUSE_DTD | |
| 24 #define NGX_HTTP_XSLT_REUSE_DTD 1 | |
| 25 #endif | |
| 26 | |
| 27 | |
| 28 typedef struct { | |
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29 u_char *name; |
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30 void *data; |
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31 } ngx_http_xslt_file_t; |
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32 |
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33 |
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34 typedef struct { |
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35 ngx_array_t dtd_files; /* ngx_http_xslt_file_t */ |
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36 ngx_array_t sheet_files; /* ngx_http_xslt_file_t */ |
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37 } ngx_http_xslt_filter_main_conf_t; |
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38 |
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39 |
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40 typedef struct { |
| 2139 | 41 xsltStylesheetPtr stylesheet; |
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42 ngx_array_t params; /* ngx_http_complex_value_t */ |
| 2139 | 43 } ngx_http_xslt_sheet_t; |
| 44 | |
| 45 | |
| 46 typedef struct { | |
| 47 xmlDtdPtr dtd; | |
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48 ngx_array_t sheets; /* ngx_http_xslt_sheet_t */ |
| 2148 | 49 ngx_hash_t types; |
| 50 ngx_array_t *types_keys; | |
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51 } ngx_http_xslt_filter_loc_conf_t; |
| 2139 | 52 |
| 53 | |
| 54 typedef struct { | |
| 55 xmlDocPtr doc; | |
| 56 xmlParserCtxtPtr ctxt; | |
| 57 ngx_http_request_t *request; | |
| 58 ngx_array_t params; | |
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59 |
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60 ngx_uint_t done; /* unsigned done:1; */ |
| 2139 | 61 } ngx_http_xslt_filter_ctx_t; |
| 62 | |
| 63 | |
| 64 static ngx_int_t ngx_http_xslt_send(ngx_http_request_t *r, | |
| 65 ngx_http_xslt_filter_ctx_t *ctx, ngx_buf_t *b); | |
| 66 static ngx_int_t ngx_http_xslt_add_chunk(ngx_http_request_t *r, | |
| 67 ngx_http_xslt_filter_ctx_t *ctx, ngx_buf_t *b); | |
| 68 | |
| 69 | |
| 70 static void ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name, | |
| 71 const xmlChar *externalId, const xmlChar *systemId); | |
| 72 static void ngx_cdecl ngx_http_xslt_sax_error(void *data, const char *msg, ...); | |
| 73 | |
| 74 | |
| 75 static ngx_buf_t *ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r, | |
| 76 ngx_http_xslt_filter_ctx_t *ctx); | |
| 77 static ngx_int_t ngx_http_xslt_params(ngx_http_request_t *r, | |
| 78 ngx_http_xslt_filter_ctx_t *ctx, ngx_array_t *params); | |
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79 static u_char *ngx_http_xslt_content_type(xsltStylesheetPtr s); |
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80 static u_char *ngx_http_xslt_encoding(xsltStylesheetPtr s); |
| 2139 | 81 static void ngx_http_xslt_cleanup(void *data); |
| 82 | |
| 83 static char *ngx_http_xslt_entities(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 84 void *conf); | |
| 85 static char *ngx_http_xslt_stylesheet(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 86 void *conf); | |
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87 static void ngx_http_xslt_cleanup_dtd(void *data); |
| 2139 | 88 static void ngx_http_xslt_cleanup_stylesheet(void *data); |
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89 static void *ngx_http_xslt_filter_create_main_conf(ngx_conf_t *cf); |
| 2139 | 90 static void *ngx_http_xslt_filter_create_conf(ngx_conf_t *cf); |
| 91 static char *ngx_http_xslt_filter_merge_conf(ngx_conf_t *cf, void *parent, | |
| 92 void *child); | |
| 93 static ngx_int_t ngx_http_xslt_filter_init(ngx_conf_t *cf); | |
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94 static void ngx_http_xslt_filter_exit(ngx_cycle_t *cycle); |
| 2139 | 95 |
| 96 | |
| 97 ngx_str_t ngx_http_xslt_default_types[] = { | |
| 98 ngx_string("text/xml"), | |
| 99 ngx_null_string | |
| 100 }; | |
| 101 | |
| 102 | |
| 103 static ngx_command_t ngx_http_xslt_filter_commands[] = { | |
| 104 | |
| 105 { ngx_string("xml_entities"), | |
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106 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
| 2139 | 107 ngx_http_xslt_entities, |
| 108 NGX_HTTP_LOC_CONF_OFFSET, | |
| 109 0, | |
| 110 NULL }, | |
| 111 | |
| 112 { ngx_string("xslt_stylesheet"), | |
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113 NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, |
| 2139 | 114 ngx_http_xslt_stylesheet, |
| 115 NGX_HTTP_LOC_CONF_OFFSET, | |
| 116 0, | |
| 117 NULL }, | |
| 118 | |
| 119 { ngx_string("xslt_types"), | |
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120 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, |
| 2139 | 121 ngx_http_types_slot, |
| 122 NGX_HTTP_LOC_CONF_OFFSET, | |
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123 offsetof(ngx_http_xslt_filter_loc_conf_t, types_keys), |
| 2139 | 124 &ngx_http_xslt_default_types[0] }, |
| 125 | |
| 126 ngx_null_command | |
| 127 }; | |
| 128 | |
| 129 | |
| 130 static ngx_http_module_t ngx_http_xslt_filter_module_ctx = { | |
| 131 NULL, /* preconfiguration */ | |
| 132 ngx_http_xslt_filter_init, /* postconfiguration */ | |
| 133 | |
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134 ngx_http_xslt_filter_create_main_conf, /* create main configuration */ |
| 2139 | 135 NULL, /* init main configuration */ |
| 136 | |
| 137 NULL, /* create server configuration */ | |
| 138 NULL, /* merge server configuration */ | |
| 139 | |
| 140 ngx_http_xslt_filter_create_conf, /* create location configuration */ | |
| 141 ngx_http_xslt_filter_merge_conf /* merge location configuration */ | |
| 142 }; | |
| 143 | |
| 144 | |
| 145 ngx_module_t ngx_http_xslt_filter_module = { | |
| 146 NGX_MODULE_V1, | |
| 147 &ngx_http_xslt_filter_module_ctx, /* module context */ | |
| 148 ngx_http_xslt_filter_commands, /* module directives */ | |
| 149 NGX_HTTP_MODULE, /* module type */ | |
| 150 NULL, /* init master */ | |
| 151 NULL, /* init module */ | |
| 152 NULL, /* init process */ | |
| 153 NULL, /* init thread */ | |
| 154 NULL, /* exit thread */ | |
| 2983 | 155 ngx_http_xslt_filter_exit, /* exit process */ |
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156 ngx_http_xslt_filter_exit, /* exit master */ |
| 2139 | 157 NGX_MODULE_V1_PADDING |
| 158 }; | |
| 159 | |
| 160 | |
| 161 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
| 162 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
| 163 | |
| 164 | |
| 165 static ngx_int_t | |
| 166 ngx_http_xslt_header_filter(ngx_http_request_t *r) | |
| 167 { | |
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168 ngx_http_xslt_filter_ctx_t *ctx; |
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169 ngx_http_xslt_filter_loc_conf_t *conf; |
| 2139 | 170 |
| 171 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 172 "xslt filter header"); | |
| 173 | |
| 174 if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) { | |
| 175 return ngx_http_next_header_filter(r); | |
| 176 } | |
| 177 | |
| 178 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module); | |
| 179 | |
| 180 if (conf->sheets.nelts == 0 | |
| 2148 | 181 || ngx_http_test_content_type(r, &conf->types) == NULL) |
| 2139 | 182 { |
| 183 return ngx_http_next_header_filter(r); | |
| 184 } | |
| 185 | |
| 186 ctx = ngx_http_get_module_ctx(r, ngx_http_xslt_filter_module); | |
| 187 | |
| 188 if (ctx) { | |
| 189 return ngx_http_next_header_filter(r); | |
| 190 } | |
| 191 | |
| 192 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_xslt_filter_ctx_t)); | |
| 193 if (ctx == NULL) { | |
| 194 return NGX_ERROR; | |
| 195 } | |
| 196 | |
| 197 ngx_http_set_ctx(r, ctx, ngx_http_xslt_filter_module); | |
| 198 | |
| 199 r->main_filter_need_in_memory = 1; | |
| 200 | |
| 201 return NGX_OK; | |
| 202 } | |
| 203 | |
| 204 | |
| 205 static ngx_int_t | |
| 206 ngx_http_xslt_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
| 207 { | |
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208 int wellFormed; |
| 2139 | 209 ngx_chain_t *cl; |
| 210 ngx_http_xslt_filter_ctx_t *ctx; | |
| 211 | |
| 212 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 213 "xslt filter body"); | |
| 214 | |
| 215 if (in == NULL) { | |
| 216 return ngx_http_next_body_filter(r, in); | |
| 217 } | |
| 218 | |
| 219 ctx = ngx_http_get_module_ctx(r, ngx_http_xslt_filter_module); | |
| 220 | |
| 221 if (ctx == NULL || ctx->done) { | |
| 222 return ngx_http_next_body_filter(r, in); | |
| 223 } | |
| 224 | |
| 225 for (cl = in; cl; cl = cl->next) { | |
| 226 | |
| 227 if (ngx_http_xslt_add_chunk(r, ctx, cl->buf) != NGX_OK) { | |
| 228 | |
| 3642 | 229 if (ctx->ctxt->myDoc) { |
| 2139 | 230 |
| 231 #if (NGX_HTTP_XSLT_REUSE_DTD) | |
| 232 ctx->ctxt->myDoc->extSubset = NULL; | |
| 233 #endif | |
| 234 xmlFreeDoc(ctx->ctxt->myDoc); | |
| 235 } | |
| 236 | |
| 237 xmlFreeParserCtxt(ctx->ctxt); | |
| 238 | |
| 239 return ngx_http_xslt_send(r, ctx, NULL); | |
| 240 } | |
| 241 | |
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242 if (cl->buf->last_buf || cl->buf->last_in_chain) { |
| 2139 | 243 |
| 244 ctx->doc = ctx->ctxt->myDoc; | |
| 245 | |
| 246 #if (NGX_HTTP_XSLT_REUSE_DTD) | |
| 247 ctx->doc->extSubset = NULL; | |
| 248 #endif | |
| 249 | |
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250 wellFormed = ctx->ctxt->wellFormed; |
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251 |
| 2139 | 252 xmlFreeParserCtxt(ctx->ctxt); |
| 253 | |
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254 if (wellFormed) { |
| 2139 | 255 return ngx_http_xslt_send(r, ctx, |
| 256 ngx_http_xslt_apply_stylesheet(r, ctx)); | |
| 257 } | |
| 258 | |
| 259 xmlFreeDoc(ctx->doc); | |
| 260 | |
| 261 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 262 "not well formed XML document"); | |
| 263 | |
| 264 return ngx_http_xslt_send(r, ctx, NULL); | |
| 265 } | |
| 266 } | |
| 267 | |
| 268 return NGX_OK; | |
| 269 } | |
| 270 | |
| 271 | |
| 272 static ngx_int_t | |
| 273 ngx_http_xslt_send(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx, | |
| 274 ngx_buf_t *b) | |
| 275 { | |
| 276 ngx_int_t rc; | |
| 277 ngx_chain_t out; | |
| 278 ngx_pool_cleanup_t *cln; | |
| 279 | |
| 280 ctx->done = 1; | |
| 281 | |
| 282 if (b == NULL) { | |
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283 return ngx_http_filter_finalize_request(r, NULL, |
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284 NGX_HTTP_INTERNAL_SERVER_ERROR); |
| 2139 | 285 } |
| 286 | |
| 287 cln = ngx_pool_cleanup_add(r->pool, 0); | |
| 288 | |
| 289 if (cln == NULL) { | |
| 290 ngx_free(b->pos); | |
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291 return ngx_http_filter_finalize_request(r, NULL, |
| 2139 | 292 NGX_HTTP_INTERNAL_SERVER_ERROR); |
| 293 } | |
| 294 | |
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295 if (r == r->main) { |
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296 r->headers_out.content_length_n = b->last - b->pos; |
| 2139 | 297 |
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298 if (r->headers_out.content_length) { |
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299 r->headers_out.content_length->hash = 0; |
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300 r->headers_out.content_length = NULL; |
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301 } |
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302 |
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303 ngx_http_clear_last_modified(r); |
| 2139 | 304 } |
| 305 | |
| 306 rc = ngx_http_next_header_filter(r); | |
| 307 | |
| 308 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) { | |
| 309 ngx_free(b->pos); | |
| 310 return rc; | |
| 311 } | |
| 312 | |
| 313 cln->handler = ngx_http_xslt_cleanup; | |
| 314 cln->data = b->pos; | |
| 315 | |
| 316 out.buf = b; | |
| 317 out.next = NULL; | |
| 318 | |
| 319 return ngx_http_next_body_filter(r, &out); | |
| 320 } | |
| 321 | |
| 322 | |
| 323 static ngx_int_t | |
| 324 ngx_http_xslt_add_chunk(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx, | |
| 325 ngx_buf_t *b) | |
| 326 { | |
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327 int err; |
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328 xmlParserCtxtPtr ctxt; |
| 2139 | 329 |
| 330 if (ctx->ctxt == NULL) { | |
| 331 | |
| 332 ctxt = xmlCreatePushParserCtxt(NULL, NULL, NULL, 0, NULL); | |
| 333 if (ctxt == NULL) { | |
| 334 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 335 "xmlCreatePushParserCtxt() failed"); | |
| 336 return NGX_ERROR; | |
| 337 } | |
| 338 | |
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339 ctxt->sax->externalSubset = ngx_http_xslt_sax_external_subset; |
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340 ctxt->sax->setDocumentLocator = NULL; |
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341 ctxt->sax->warning = NULL; |
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342 ctxt->sax->error = ngx_http_xslt_sax_error; |
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343 ctxt->sax->fatalError = ngx_http_xslt_sax_error; |
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344 ctxt->sax->_private = ctx; |
| 2139 | 345 ctxt->replaceEntities = 1; |
| 346 ctxt->loadsubset = 1; | |
| 347 | |
| 348 ctx->ctxt = ctxt; | |
| 349 ctx->request = r; | |
| 350 } | |
| 351 | |
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352 err = xmlParseChunk(ctx->ctxt, (char *) b->pos, (int) (b->last - b->pos), |
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353 (b->last_buf) || (b->last_in_chain)); |
| 2139 | 354 |
| 355 if (err == 0) { | |
| 356 b->pos = b->last; | |
| 357 return NGX_OK; | |
| 358 } | |
| 359 | |
| 360 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 361 "xmlParseChunk() failed, error:%d", err); | |
| 362 | |
| 363 return NGX_ERROR; | |
| 364 } | |
| 365 | |
| 366 | |
| 367 static void | |
| 368 ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name, | |
| 369 const xmlChar *externalId, const xmlChar *systemId) | |
| 370 { | |
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371 xmlParserCtxtPtr ctxt = data; |
| 2139 | 372 |
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373 xmlDocPtr doc; |
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374 xmlDtdPtr dtd; |
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375 ngx_http_request_t *r; |
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376 ngx_http_xslt_filter_ctx_t *ctx; |
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377 ngx_http_xslt_filter_loc_conf_t *conf; |
| 2139 | 378 |
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379 ctx = ctxt->sax->_private; |
| 2139 | 380 r = ctx->request; |
| 381 | |
| 382 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module); | |
| 383 | |
| 384 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 385 "xslt filter extSubset: \"%s\" \"%s\" \"%s\"", | |
| 386 name ? name : (xmlChar *) "", | |
| 387 externalId ? externalId : (xmlChar *) "", | |
| 388 systemId ? systemId : (xmlChar *) ""); | |
| 389 | |
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390 doc = ctxt->myDoc; |
| 2139 | 391 |
| 392 #if (NGX_HTTP_XSLT_REUSE_DTD) | |
| 393 | |
| 394 dtd = conf->dtd; | |
| 395 | |
| 396 #else | |
| 397 | |
| 398 dtd = xmlCopyDtd(conf->dtd); | |
| 399 if (dtd == NULL) { | |
| 400 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 401 "xmlCopyDtd() failed"); | |
| 402 return; | |
| 403 } | |
| 404 | |
| 405 if (doc->children == NULL) { | |
| 406 xmlAddChild((xmlNodePtr) doc, (xmlNodePtr) dtd); | |
| 407 | |
| 408 } else { | |
| 409 xmlAddPrevSibling(doc->children, (xmlNodePtr) dtd); | |
| 410 } | |
| 411 | |
| 412 #endif | |
| 413 | |
| 414 doc->extSubset = dtd; | |
| 415 } | |
| 416 | |
| 417 | |
| 418 static void ngx_cdecl | |
| 419 ngx_http_xslt_sax_error(void *data, const char *msg, ...) | |
| 420 { | |
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421 xmlParserCtxtPtr ctxt = data; |
| 2139 | 422 |
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423 size_t n; |
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424 va_list args; |
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425 ngx_http_xslt_filter_ctx_t *ctx; |
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426 u_char buf[NGX_MAX_ERROR_STR]; |
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427 |
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428 ctx = ctxt->sax->_private; |
| 2139 | 429 |
| 430 buf[0] = '\0'; | |
| 431 | |
| 432 va_start(args, msg); | |
| 433 n = (size_t) vsnprintf((char *) buf, NGX_MAX_ERROR_STR, msg, args); | |
| 434 va_end(args); | |
| 435 | |
| 436 while (--n && (buf[n] == CR || buf[n] == LF)) { /* void */ } | |
| 437 | |
| 438 ngx_log_error(NGX_LOG_ERR, ctx->request->connection->log, 0, | |
| 2999 | 439 "libxml2 error: \"%*s\"", n + 1, buf); |
| 2139 | 440 } |
| 441 | |
| 442 | |
| 443 static ngx_buf_t * | |
| 444 ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r, | |
| 445 ngx_http_xslt_filter_ctx_t *ctx) | |
| 446 { | |
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447 int len, rc, doc_type; |
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448 u_char *type, *encoding; |
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449 ngx_buf_t *b; |
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450 ngx_uint_t i; |
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451 xmlChar *buf; |
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452 xmlDocPtr doc, res; |
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453 ngx_http_xslt_sheet_t *sheet; |
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454 ngx_http_xslt_filter_loc_conf_t *conf; |
| 2139 | 455 |
| 456 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module); | |
| 457 sheet = conf->sheets.elts; | |
| 458 doc = ctx->doc; | |
| 459 | |
| 460 /* preallocate array for 4 params */ | |
| 461 | |
| 462 if (ngx_array_init(&ctx->params, r->pool, 4 * 2 + 1, sizeof(char *)) | |
| 463 != NGX_OK) | |
| 464 { | |
| 465 xmlFreeDoc(doc); | |
| 466 return NULL; | |
| 467 } | |
| 468 | |
| 469 for (i = 0; i < conf->sheets.nelts; i++) { | |
| 470 | |
| 471 if (ngx_http_xslt_params(r, ctx, &sheet[i].params) != NGX_OK) { | |
| 472 xmlFreeDoc(doc); | |
| 473 return NULL; | |
| 474 } | |
| 475 | |
| 476 res = xsltApplyStylesheet(sheet[i].stylesheet, doc, ctx->params.elts); | |
| 477 | |
| 478 xmlFreeDoc(doc); | |
| 479 | |
| 480 if (res == NULL) { | |
| 481 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 482 "xsltApplyStylesheet() failed"); | |
| 483 return NULL; | |
| 484 } | |
| 485 | |
| 486 doc = res; | |
| 487 | |
| 488 /* reset array elements */ | |
| 489 ctx->params.nelts = 0; | |
| 490 } | |
| 491 | |
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492 /* there must be at least one stylesheet */ |
| 2139 | 493 |
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494 if (r == r->main) { |
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495 type = ngx_http_xslt_content_type(sheet[i - 1].stylesheet); |
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496 |
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497 } else { |
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498 type = NULL; |
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499 } |
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500 |
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501 encoding = ngx_http_xslt_encoding(sheet[i - 1].stylesheet); |
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502 doc_type = doc->type; |
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503 |
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504 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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505 "xslt filter type: %d t:%s e:%s", |
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506 doc_type, type ? type : (u_char *) "(null)", |
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507 encoding ? encoding : (u_char *) "(null)"); |
| 2139 | 508 |
| 509 rc = xsltSaveResultToString(&buf, &len, doc, sheet[i - 1].stylesheet); | |
| 510 | |
| 511 xmlFreeDoc(doc); | |
| 512 | |
| 513 if (rc != 0) { | |
| 514 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 515 "xsltSaveResultToString() failed"); | |
| 516 return NULL; | |
| 517 } | |
| 518 | |
| 519 if (len == 0) { | |
| 520 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 521 "xsltSaveResultToString() returned zero-length result"); | |
| 522 return NULL; | |
| 523 } | |
| 524 | |
| 525 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); | |
| 526 if (b == NULL) { | |
| 527 ngx_free(buf); | |
| 528 return NULL; | |
| 529 } | |
| 530 | |
| 531 b->pos = buf; | |
| 532 b->last = buf + len; | |
| 533 b->memory = 1; | |
| 534 | |
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535 if (encoding) { |
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536 r->headers_out.charset.len = ngx_strlen(encoding); |
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537 r->headers_out.charset.data = encoding; |
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538 } |
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539 |
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540 if (r != r->main) { |
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541 return b; |
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542 } |
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543 |
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544 b->last_buf = 1; |
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545 |
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546 if (type) { |
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547 len = ngx_strlen(type); |
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548 |
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549 r->headers_out.content_type_len = len; |
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550 r->headers_out.content_type.len = len; |
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551 r->headers_out.content_type.data = type; |
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552 |
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553 } else if (doc_type == XML_HTML_DOCUMENT_NODE) { |
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554 |
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555 r->headers_out.content_type_len = sizeof("text/html") - 1; |
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556 ngx_str_set(&r->headers_out.content_type, "text/html"); |
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557 } |
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558 |
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559 r->headers_out.content_type_lowcase = NULL; |
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560 |
| 2139 | 561 return b; |
| 562 } | |
| 563 | |
| 564 | |
| 565 static ngx_int_t | |
| 566 ngx_http_xslt_params(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx, | |
| 567 ngx_array_t *params) | |
| 568 { | |
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569 u_char *p, *last, *value, *dst, *src, **s; |
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570 size_t len; |
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571 ngx_uint_t i; |
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572 ngx_str_t string; |
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573 ngx_http_complex_value_t *param; |
| 2139 | 574 |
| 575 param = params->elts; | |
| 576 | |
| 577 for (i = 0; i < params->nelts; i++) { | |
| 578 | |
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579 if (ngx_http_complex_value(r, ¶m[i], &string) != NGX_OK) { |
| 2139 | 580 return NGX_ERROR; |
| 581 } | |
| 582 | |
| 583 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 584 "xslt filter param: \"%s\"", string.data); | |
| 585 | |
| 586 p = string.data; | |
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587 last = string.data + string.len - 1; |
| 2139 | 588 |
| 589 while (p && *p) { | |
| 590 | |
| 591 value = p; | |
| 592 p = (u_char *) ngx_strchr(p, '='); | |
| 593 if (p == NULL) { | |
| 594 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 595 "invalid libxslt parameter \"%s\"", value); | |
| 596 return NGX_ERROR; | |
| 597 } | |
| 598 *p++ = '\0'; | |
| 599 | |
| 600 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 601 "xslt filter param name: \"%s\"", value); | |
| 602 | |
| 603 s = ngx_array_push(&ctx->params); | |
| 604 if (s == NULL) { | |
| 605 return NGX_ERROR; | |
| 606 } | |
| 607 | |
| 608 *s = value; | |
| 609 | |
| 610 value = p; | |
| 611 p = (u_char *) ngx_strchr(p, ':'); | |
| 612 | |
| 613 if (p) { | |
| 614 len = p - value; | |
| 615 *p++ = '\0'; | |
| 616 | |
| 617 } else { | |
| 618 len = last - value; | |
| 619 } | |
| 620 | |
| 621 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 622 "xslt filter param value: \"%s\"", value); | |
| 623 | |
| 624 dst = value; | |
| 625 src = value; | |
| 626 | |
| 627 ngx_unescape_uri(&dst, &src, len, 0); | |
| 628 | |
| 629 *dst = '\0'; | |
| 630 | |
| 631 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 632 "xslt filter param unescaped: \"%s\"", value); | |
| 633 | |
| 634 s = ngx_array_push(&ctx->params); | |
| 635 if (s == NULL) { | |
| 636 return NGX_ERROR; | |
| 637 } | |
| 638 | |
| 639 *s = value; | |
| 640 } | |
| 641 } | |
| 642 | |
| 643 s = ngx_array_push(&ctx->params); | |
| 644 if (s == NULL) { | |
| 645 return NGX_ERROR; | |
| 646 } | |
| 647 | |
| 648 *s = NULL; | |
| 649 | |
| 650 return NGX_OK; | |
| 651 } | |
| 652 | |
| 653 | |
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654 static u_char * |
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655 ngx_http_xslt_content_type(xsltStylesheetPtr s) |
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656 { |
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657 u_char *type; |
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658 |
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659 if (s->mediaType) { |
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660 return s->mediaType; |
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661 } |
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662 |
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663 for (s = s->imports; s; s = s->next) { |
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664 |
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665 type = ngx_http_xslt_content_type(s); |
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666 |
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667 if (type) { |
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668 return type; |
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669 } |
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670 } |
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671 |
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672 return NULL; |
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673 } |
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674 |
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675 |
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676 static u_char * |
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677 ngx_http_xslt_encoding(xsltStylesheetPtr s) |
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678 { |
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679 u_char *encoding; |
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680 |
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681 if (s->encoding) { |
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682 return s->encoding; |
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683 } |
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684 |
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685 for (s = s->imports; s; s = s->next) { |
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686 |
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687 encoding = ngx_http_xslt_encoding(s); |
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688 |
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689 if (encoding) { |
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690 return encoding; |
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691 } |
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692 } |
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693 |
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694 return NULL; |
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695 } |
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696 |
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697 |
| 2139 | 698 static void |
| 699 ngx_http_xslt_cleanup(void *data) | |
| 700 { | |
| 701 ngx_free(data); | |
| 702 } | |
| 703 | |
| 704 | |
| 705 static char * | |
| 706 ngx_http_xslt_entities(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 707 { | |
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708 ngx_http_xslt_filter_loc_conf_t *xlcf = conf; |
| 2139 | 709 |
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710 ngx_str_t *value; |
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711 ngx_uint_t i; |
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712 ngx_pool_cleanup_t *cln; |
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713 ngx_http_xslt_file_t *file; |
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714 ngx_http_xslt_filter_main_conf_t *xmcf; |
| 2139 | 715 |
| 716 if (xlcf->dtd) { | |
| 717 return "is duplicate"; | |
| 718 } | |
| 719 | |
| 720 value = cf->args->elts; | |
| 721 | |
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722 xmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_xslt_filter_module); |
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723 |
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724 file = xmcf->dtd_files.elts; |
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725 for (i = 0; i < xmcf->dtd_files.nelts; i++) { |
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726 if (ngx_strcmp(file[i].name, &value[1].data) == 0) { |
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727 xlcf->dtd = file[i].data; |
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728 return NGX_CONF_OK; |
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729 } |
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730 } |
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731 |
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732 cln = ngx_pool_cleanup_add(cf->pool, 0); |
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733 if (cln == NULL) { |
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734 return NGX_CONF_ERROR; |
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735 } |
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736 |
| 2139 | 737 xlcf->dtd = xmlParseDTD(NULL, (xmlChar *) value[1].data); |
| 738 | |
| 739 if (xlcf->dtd == NULL) { | |
| 740 ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "xmlParseDTD() failed"); | |
| 741 return NGX_CONF_ERROR; | |
| 742 } | |
| 743 | |
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744 cln->handler = ngx_http_xslt_cleanup_dtd; |
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745 cln->data = xlcf->dtd; |
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746 |
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747 file = ngx_array_push(&xmcf->dtd_files); |
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748 if (file == NULL) { |
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749 return NGX_CONF_ERROR; |
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750 } |
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751 |
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752 file->name = value[1].data; |
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753 file->data = xlcf->dtd; |
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754 |
| 2139 | 755 return NGX_CONF_OK; |
| 756 } | |
| 757 | |
| 758 | |
| 759 | |
| 760 static char * | |
| 761 ngx_http_xslt_stylesheet(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 762 { | |
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763 ngx_http_xslt_filter_loc_conf_t *xlcf = conf; |
| 2139 | 764 |
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765 ngx_str_t *value; |
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766 ngx_uint_t i, n; |
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767 ngx_pool_cleanup_t *cln; |
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768 ngx_http_xslt_file_t *file; |
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769 ngx_http_xslt_sheet_t *sheet; |
|
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770 ngx_http_complex_value_t *param; |
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771 ngx_http_compile_complex_value_t ccv; |
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772 ngx_http_xslt_filter_main_conf_t *xmcf; |
| 2139 | 773 |
| 774 value = cf->args->elts; | |
| 775 | |
| 776 if (xlcf->sheets.elts == NULL) { | |
| 777 if (ngx_array_init(&xlcf->sheets, cf->pool, 1, | |
| 778 sizeof(ngx_http_xslt_sheet_t)) | |
| 779 != NGX_OK) | |
| 780 { | |
| 781 return NGX_CONF_ERROR; | |
| 782 } | |
| 783 } | |
| 784 | |
| 785 sheet = ngx_array_push(&xlcf->sheets); | |
| 786 if (sheet == NULL) { | |
| 787 return NGX_CONF_ERROR; | |
| 788 } | |
| 789 | |
| 790 ngx_memzero(sheet, sizeof(ngx_http_xslt_sheet_t)); | |
| 791 | |
| 792 if (ngx_conf_full_name(cf->cycle, &value[1], 0) != NGX_OK) { | |
| 793 return NGX_CONF_ERROR; | |
| 794 } | |
| 795 | |
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796 xmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_xslt_filter_module); |
|
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797 |
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798 file = xmcf->sheet_files.elts; |
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799 for (i = 0; i < xmcf->sheet_files.nelts; i++) { |
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800 if (ngx_strcmp(file[i].name, &value[1].data) == 0) { |
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801 sheet->stylesheet = file[i].data; |
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802 goto found; |
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803 } |
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804 } |
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805 |
| 2139 | 806 cln = ngx_pool_cleanup_add(cf->pool, 0); |
| 807 if (cln == NULL) { | |
| 808 return NGX_CONF_ERROR; | |
| 809 } | |
| 810 | |
| 811 sheet->stylesheet = xsltParseStylesheetFile(value[1].data); | |
| 812 if (sheet->stylesheet == NULL) { | |
| 813 ngx_conf_log_error(NGX_LOG_ERR, cf, 0, | |
| 814 "xsltParseStylesheetFile(\"%s\") failed", | |
| 815 value[1].data); | |
| 816 return NGX_CONF_ERROR; | |
| 817 } | |
| 818 | |
| 819 cln->handler = ngx_http_xslt_cleanup_stylesheet; | |
| 820 cln->data = sheet->stylesheet; | |
| 821 | |
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822 file = ngx_array_push(&xmcf->sheet_files); |
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823 if (file == NULL) { |
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824 return NGX_CONF_ERROR; |
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825 } |
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826 |
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827 file->name = value[1].data; |
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828 file->data = sheet->stylesheet; |
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829 |
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830 found: |
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831 |
| 2139 | 832 n = cf->args->nelts; |
| 833 | |
| 834 if (n == 2) { | |
| 835 return NGX_CONF_OK; | |
| 836 } | |
| 837 | |
| 838 if (ngx_array_init(&sheet->params, cf->pool, n - 2, | |
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839 sizeof(ngx_http_complex_value_t)) |
| 2139 | 840 != NGX_OK) |
| 841 { | |
| 842 return NGX_CONF_ERROR; | |
| 843 } | |
| 844 | |
| 845 for (i = 2; i < n; i++) { | |
| 846 | |
| 847 param = ngx_array_push(&sheet->params); | |
| 848 if (param == NULL) { | |
| 849 return NGX_CONF_ERROR; | |
| 850 } | |
| 851 | |
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852 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
| 2139 | 853 |
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854 ccv.cf = cf; |
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855 ccv.value = &value[i]; |
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856 ccv.complex_value = param; |
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857 ccv.zero = 1; |
| 2139 | 858 |
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859 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
| 2139 | 860 return NGX_CONF_ERROR; |
| 861 } | |
| 862 } | |
| 863 | |
| 864 return NGX_CONF_OK; | |
| 865 } | |
| 866 | |
| 867 | |
| 868 static void | |
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869 ngx_http_xslt_cleanup_dtd(void *data) |
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870 { |
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871 xmlFreeDtd(data); |
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872 } |
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873 |
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874 |
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875 static void |
| 2139 | 876 ngx_http_xslt_cleanup_stylesheet(void *data) |
| 877 { | |
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878 xsltFreeStylesheet(data); |
| 2139 | 879 } |
| 880 | |
| 881 | |
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882 static void * |
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883 ngx_http_xslt_filter_create_main_conf(ngx_conf_t *cf) |
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884 { |
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885 ngx_http_xslt_filter_main_conf_t *conf; |
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886 |
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887 conf = ngx_palloc(cf->pool, sizeof(ngx_http_xslt_filter_main_conf_t)); |
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888 if (conf == NULL) { |
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889 return NULL; |
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890 } |
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891 |
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892 if (ngx_array_init(&conf->dtd_files, cf->pool, 1, |
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893 sizeof(ngx_http_xslt_file_t)) |
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894 != NGX_OK) |
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895 { |
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896 return NULL; |
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897 } |
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898 |
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899 if (ngx_array_init(&conf->sheet_files, cf->pool, 1, |
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900 sizeof(ngx_http_xslt_file_t)) |
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901 != NGX_OK) |
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902 { |
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903 return NULL; |
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904 } |
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905 |
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906 return conf; |
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907 } |
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908 |
| 2139 | 909 |
| 910 static void * | |
| 911 ngx_http_xslt_filter_create_conf(ngx_conf_t *cf) | |
| 912 { | |
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913 ngx_http_xslt_filter_loc_conf_t *conf; |
| 2139 | 914 |
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915 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_xslt_filter_loc_conf_t)); |
| 2139 | 916 if (conf == NULL) { |
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917 return NULL; |
| 2139 | 918 } |
| 919 | |
| 920 /* | |
| 921 * set by ngx_pcalloc(): | |
| 922 * | |
| 2148 | 923 * conf->dtd = NULL; |
| 924 * conf->sheets = { NULL }; | |
| 925 * conf->types = { NULL }; | |
| 926 * conf->types_keys = NULL; | |
| 2139 | 927 */ |
| 928 | |
| 929 return conf; | |
| 930 } | |
| 931 | |
| 932 | |
| 933 static char * | |
| 934 ngx_http_xslt_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 935 { | |
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936 ngx_http_xslt_filter_loc_conf_t *prev = parent; |
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937 ngx_http_xslt_filter_loc_conf_t *conf = child; |
| 2139 | 938 |
| 939 if (conf->dtd == NULL) { | |
| 940 conf->dtd = prev->dtd; | |
| 941 } | |
| 942 | |
| 943 if (conf->sheets.nelts == 0) { | |
| 944 conf->sheets = prev->sheets; | |
| 945 } | |
| 946 | |
|
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947 if (ngx_http_merge_types(cf, &conf->types_keys, &conf->types, |
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948 &prev->types_keys, &prev->types, |
| 2148 | 949 ngx_http_xslt_default_types) |
| 2139 | 950 != NGX_OK) |
| 951 { | |
| 952 return NGX_CONF_ERROR; | |
| 953 } | |
| 954 | |
| 955 return NGX_CONF_OK; | |
| 956 } | |
| 957 | |
| 958 | |
| 959 static ngx_int_t | |
| 960 ngx_http_xslt_filter_init(ngx_conf_t *cf) | |
| 961 { | |
| 962 xmlInitParser(); | |
| 963 | |
| 2299 | 964 #if (NGX_HAVE_EXSLT) |
| 965 exsltRegisterAll(); | |
| 966 #endif | |
| 967 | |
| 2139 | 968 ngx_http_next_header_filter = ngx_http_top_header_filter; |
| 969 ngx_http_top_header_filter = ngx_http_xslt_header_filter; | |
| 970 | |
| 971 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
| 972 ngx_http_top_body_filter = ngx_http_xslt_body_filter; | |
| 973 | |
| 974 return NGX_OK; | |
| 975 } | |
| 976 | |
| 977 | |
| 978 static void | |
| 979 ngx_http_xslt_filter_exit(ngx_cycle_t *cycle) | |
| 980 { | |
| 981 xsltCleanupGlobals(); | |
| 982 xmlCleanupParser(); | |
| 983 } |