Mercurial > hg > nginx
annotate src/http/modules/ngx_http_xslt_filter_module.c @ 4412:d620f497c50f
Copyright updated.
| author | Maxim Konovalov <maxim@nginx.com> |
|---|---|
| date | Wed, 18 Jan 2012 15:07:43 +0000 |
| parents | 47c1a9bff989 |
| children | 3dd8a403faa1 |
| rev | line source |
|---|---|
| 2139 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4412 | 4 * Copyright (C) Nginx, Inc. |
| 2139 | 5 */ |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_http.h> | |
| 11 | |
| 12 #include <libxml/parser.h> | |
| 13 #include <libxml/tree.h> | |
| 14 #include <libxslt/xslt.h> | |
| 15 #include <libxslt/xsltInternals.h> | |
| 16 #include <libxslt/transform.h> | |
| 17 #include <libxslt/xsltutils.h> | |
| 18 | |
| 2299 | 19 #if (NGX_HAVE_EXSLT) |
| 20 #include <libexslt/exslt.h> | |
| 21 #endif | |
| 22 | |
| 2139 | 23 |
| 24 #ifndef NGX_HTTP_XSLT_REUSE_DTD | |
| 25 #define NGX_HTTP_XSLT_REUSE_DTD 1 | |
| 26 #endif | |
| 27 | |
| 28 | |
| 29 typedef struct { | |
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30 u_char *name; |
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31 void *data; |
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32 } ngx_http_xslt_file_t; |
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33 |
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34 |
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35 typedef struct { |
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36 ngx_array_t dtd_files; /* ngx_http_xslt_file_t */ |
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37 ngx_array_t sheet_files; /* ngx_http_xslt_file_t */ |
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38 } ngx_http_xslt_filter_main_conf_t; |
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39 |
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40 |
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41 typedef struct { |
| 2139 | 42 xsltStylesheetPtr stylesheet; |
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43 ngx_array_t params; /* ngx_http_complex_value_t */ |
| 2139 | 44 } ngx_http_xslt_sheet_t; |
| 45 | |
| 46 | |
| 47 typedef struct { | |
| 48 xmlDtdPtr dtd; | |
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49 ngx_array_t sheets; /* ngx_http_xslt_sheet_t */ |
| 2148 | 50 ngx_hash_t types; |
| 51 ngx_array_t *types_keys; | |
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52 } ngx_http_xslt_filter_loc_conf_t; |
| 2139 | 53 |
| 54 | |
| 55 typedef struct { | |
| 56 xmlDocPtr doc; | |
| 57 xmlParserCtxtPtr ctxt; | |
| 58 ngx_http_request_t *request; | |
| 59 ngx_array_t params; | |
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60 |
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61 ngx_uint_t done; /* unsigned done:1; */ |
| 2139 | 62 } ngx_http_xslt_filter_ctx_t; |
| 63 | |
| 64 | |
| 65 static ngx_int_t ngx_http_xslt_send(ngx_http_request_t *r, | |
| 66 ngx_http_xslt_filter_ctx_t *ctx, ngx_buf_t *b); | |
| 67 static ngx_int_t ngx_http_xslt_add_chunk(ngx_http_request_t *r, | |
| 68 ngx_http_xslt_filter_ctx_t *ctx, ngx_buf_t *b); | |
| 69 | |
| 70 | |
| 71 static void ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name, | |
| 72 const xmlChar *externalId, const xmlChar *systemId); | |
| 73 static void ngx_cdecl ngx_http_xslt_sax_error(void *data, const char *msg, ...); | |
| 74 | |
| 75 | |
| 76 static ngx_buf_t *ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r, | |
| 77 ngx_http_xslt_filter_ctx_t *ctx); | |
| 78 static ngx_int_t ngx_http_xslt_params(ngx_http_request_t *r, | |
| 79 ngx_http_xslt_filter_ctx_t *ctx, ngx_array_t *params); | |
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80 static u_char *ngx_http_xslt_content_type(xsltStylesheetPtr s); |
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81 static u_char *ngx_http_xslt_encoding(xsltStylesheetPtr s); |
| 2139 | 82 static void ngx_http_xslt_cleanup(void *data); |
| 83 | |
| 84 static char *ngx_http_xslt_entities(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 85 void *conf); | |
| 86 static char *ngx_http_xslt_stylesheet(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 87 void *conf); | |
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88 static void ngx_http_xslt_cleanup_dtd(void *data); |
| 2139 | 89 static void ngx_http_xslt_cleanup_stylesheet(void *data); |
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90 static void *ngx_http_xslt_filter_create_main_conf(ngx_conf_t *cf); |
| 2139 | 91 static void *ngx_http_xslt_filter_create_conf(ngx_conf_t *cf); |
| 92 static char *ngx_http_xslt_filter_merge_conf(ngx_conf_t *cf, void *parent, | |
| 93 void *child); | |
| 94 static ngx_int_t ngx_http_xslt_filter_init(ngx_conf_t *cf); | |
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95 static void ngx_http_xslt_filter_exit(ngx_cycle_t *cycle); |
| 2139 | 96 |
| 97 | |
| 98 ngx_str_t ngx_http_xslt_default_types[] = { | |
| 99 ngx_string("text/xml"), | |
| 100 ngx_null_string | |
| 101 }; | |
| 102 | |
| 103 | |
| 104 static ngx_command_t ngx_http_xslt_filter_commands[] = { | |
| 105 | |
| 106 { ngx_string("xml_entities"), | |
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107 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
| 2139 | 108 ngx_http_xslt_entities, |
| 109 NGX_HTTP_LOC_CONF_OFFSET, | |
| 110 0, | |
| 111 NULL }, | |
| 112 | |
| 113 { ngx_string("xslt_stylesheet"), | |
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114 NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, |
| 2139 | 115 ngx_http_xslt_stylesheet, |
| 116 NGX_HTTP_LOC_CONF_OFFSET, | |
| 117 0, | |
| 118 NULL }, | |
| 119 | |
| 120 { ngx_string("xslt_types"), | |
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121 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, |
| 2139 | 122 ngx_http_types_slot, |
| 123 NGX_HTTP_LOC_CONF_OFFSET, | |
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124 offsetof(ngx_http_xslt_filter_loc_conf_t, types_keys), |
| 2139 | 125 &ngx_http_xslt_default_types[0] }, |
| 126 | |
| 127 ngx_null_command | |
| 128 }; | |
| 129 | |
| 130 | |
| 131 static ngx_http_module_t ngx_http_xslt_filter_module_ctx = { | |
| 132 NULL, /* preconfiguration */ | |
| 133 ngx_http_xslt_filter_init, /* postconfiguration */ | |
| 134 | |
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135 ngx_http_xslt_filter_create_main_conf, /* create main configuration */ |
| 2139 | 136 NULL, /* init main configuration */ |
| 137 | |
| 138 NULL, /* create server configuration */ | |
| 139 NULL, /* merge server configuration */ | |
| 140 | |
| 141 ngx_http_xslt_filter_create_conf, /* create location configuration */ | |
| 142 ngx_http_xslt_filter_merge_conf /* merge location configuration */ | |
| 143 }; | |
| 144 | |
| 145 | |
| 146 ngx_module_t ngx_http_xslt_filter_module = { | |
| 147 NGX_MODULE_V1, | |
| 148 &ngx_http_xslt_filter_module_ctx, /* module context */ | |
| 149 ngx_http_xslt_filter_commands, /* module directives */ | |
| 150 NGX_HTTP_MODULE, /* module type */ | |
| 151 NULL, /* init master */ | |
| 152 NULL, /* init module */ | |
| 153 NULL, /* init process */ | |
| 154 NULL, /* init thread */ | |
| 155 NULL, /* exit thread */ | |
| 2983 | 156 ngx_http_xslt_filter_exit, /* exit process */ |
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157 ngx_http_xslt_filter_exit, /* exit master */ |
| 2139 | 158 NGX_MODULE_V1_PADDING |
| 159 }; | |
| 160 | |
| 161 | |
| 162 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
| 163 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
| 164 | |
| 165 | |
| 166 static ngx_int_t | |
| 167 ngx_http_xslt_header_filter(ngx_http_request_t *r) | |
| 168 { | |
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169 ngx_http_xslt_filter_ctx_t *ctx; |
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170 ngx_http_xslt_filter_loc_conf_t *conf; |
| 2139 | 171 |
| 172 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 173 "xslt filter header"); | |
| 174 | |
| 175 if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) { | |
| 176 return ngx_http_next_header_filter(r); | |
| 177 } | |
| 178 | |
| 179 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module); | |
| 180 | |
| 181 if (conf->sheets.nelts == 0 | |
| 2148 | 182 || ngx_http_test_content_type(r, &conf->types) == NULL) |
| 2139 | 183 { |
| 184 return ngx_http_next_header_filter(r); | |
| 185 } | |
| 186 | |
| 187 ctx = ngx_http_get_module_ctx(r, ngx_http_xslt_filter_module); | |
| 188 | |
| 189 if (ctx) { | |
| 190 return ngx_http_next_header_filter(r); | |
| 191 } | |
| 192 | |
| 193 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_xslt_filter_ctx_t)); | |
| 194 if (ctx == NULL) { | |
| 195 return NGX_ERROR; | |
| 196 } | |
| 197 | |
| 198 ngx_http_set_ctx(r, ctx, ngx_http_xslt_filter_module); | |
| 199 | |
| 200 r->main_filter_need_in_memory = 1; | |
| 201 | |
| 202 return NGX_OK; | |
| 203 } | |
| 204 | |
| 205 | |
| 206 static ngx_int_t | |
| 207 ngx_http_xslt_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
| 208 { | |
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209 int wellFormed; |
| 2139 | 210 ngx_chain_t *cl; |
| 211 ngx_http_xslt_filter_ctx_t *ctx; | |
| 212 | |
| 213 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 214 "xslt filter body"); | |
| 215 | |
| 216 if (in == NULL) { | |
| 217 return ngx_http_next_body_filter(r, in); | |
| 218 } | |
| 219 | |
| 220 ctx = ngx_http_get_module_ctx(r, ngx_http_xslt_filter_module); | |
| 221 | |
| 222 if (ctx == NULL || ctx->done) { | |
| 223 return ngx_http_next_body_filter(r, in); | |
| 224 } | |
| 225 | |
| 226 for (cl = in; cl; cl = cl->next) { | |
| 227 | |
| 228 if (ngx_http_xslt_add_chunk(r, ctx, cl->buf) != NGX_OK) { | |
| 229 | |
| 3642 | 230 if (ctx->ctxt->myDoc) { |
| 2139 | 231 |
| 232 #if (NGX_HTTP_XSLT_REUSE_DTD) | |
| 233 ctx->ctxt->myDoc->extSubset = NULL; | |
| 234 #endif | |
| 235 xmlFreeDoc(ctx->ctxt->myDoc); | |
| 236 } | |
| 237 | |
| 238 xmlFreeParserCtxt(ctx->ctxt); | |
| 239 | |
| 240 return ngx_http_xslt_send(r, ctx, NULL); | |
| 241 } | |
| 242 | |
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243 if (cl->buf->last_buf || cl->buf->last_in_chain) { |
| 2139 | 244 |
| 245 ctx->doc = ctx->ctxt->myDoc; | |
| 246 | |
| 247 #if (NGX_HTTP_XSLT_REUSE_DTD) | |
| 248 ctx->doc->extSubset = NULL; | |
| 249 #endif | |
| 250 | |
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251 wellFormed = ctx->ctxt->wellFormed; |
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252 |
| 2139 | 253 xmlFreeParserCtxt(ctx->ctxt); |
| 254 | |
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255 if (wellFormed) { |
| 2139 | 256 return ngx_http_xslt_send(r, ctx, |
| 257 ngx_http_xslt_apply_stylesheet(r, ctx)); | |
| 258 } | |
| 259 | |
| 260 xmlFreeDoc(ctx->doc); | |
| 261 | |
| 262 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 263 "not well formed XML document"); | |
| 264 | |
| 265 return ngx_http_xslt_send(r, ctx, NULL); | |
| 266 } | |
| 267 } | |
| 268 | |
| 269 return NGX_OK; | |
| 270 } | |
| 271 | |
| 272 | |
| 273 static ngx_int_t | |
| 274 ngx_http_xslt_send(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx, | |
| 275 ngx_buf_t *b) | |
| 276 { | |
| 277 ngx_int_t rc; | |
| 278 ngx_chain_t out; | |
| 279 ngx_pool_cleanup_t *cln; | |
| 280 | |
| 281 ctx->done = 1; | |
| 282 | |
| 283 if (b == NULL) { | |
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284 return ngx_http_filter_finalize_request(r, NULL, |
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285 NGX_HTTP_INTERNAL_SERVER_ERROR); |
| 2139 | 286 } |
| 287 | |
| 288 cln = ngx_pool_cleanup_add(r->pool, 0); | |
| 289 | |
| 290 if (cln == NULL) { | |
| 291 ngx_free(b->pos); | |
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292 return ngx_http_filter_finalize_request(r, NULL, |
| 2139 | 293 NGX_HTTP_INTERNAL_SERVER_ERROR); |
| 294 } | |
| 295 | |
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296 if (r == r->main) { |
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297 r->headers_out.content_length_n = b->last - b->pos; |
| 2139 | 298 |
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299 if (r->headers_out.content_length) { |
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300 r->headers_out.content_length->hash = 0; |
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301 r->headers_out.content_length = NULL; |
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302 } |
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303 |
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304 ngx_http_clear_last_modified(r); |
| 2139 | 305 } |
| 306 | |
| 307 rc = ngx_http_next_header_filter(r); | |
| 308 | |
| 309 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) { | |
| 310 ngx_free(b->pos); | |
| 311 return rc; | |
| 312 } | |
| 313 | |
| 314 cln->handler = ngx_http_xslt_cleanup; | |
| 315 cln->data = b->pos; | |
| 316 | |
| 317 out.buf = b; | |
| 318 out.next = NULL; | |
| 319 | |
| 320 return ngx_http_next_body_filter(r, &out); | |
| 321 } | |
| 322 | |
| 323 | |
| 324 static ngx_int_t | |
| 325 ngx_http_xslt_add_chunk(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx, | |
| 326 ngx_buf_t *b) | |
| 327 { | |
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328 int err; |
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329 xmlParserCtxtPtr ctxt; |
| 2139 | 330 |
| 331 if (ctx->ctxt == NULL) { | |
| 332 | |
| 333 ctxt = xmlCreatePushParserCtxt(NULL, NULL, NULL, 0, NULL); | |
| 334 if (ctxt == NULL) { | |
| 335 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 336 "xmlCreatePushParserCtxt() failed"); | |
| 337 return NGX_ERROR; | |
| 338 } | |
| 339 | |
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340 ctxt->sax->externalSubset = ngx_http_xslt_sax_external_subset; |
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341 ctxt->sax->setDocumentLocator = NULL; |
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342 ctxt->sax->warning = NULL; |
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343 ctxt->sax->error = ngx_http_xslt_sax_error; |
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344 ctxt->sax->fatalError = ngx_http_xslt_sax_error; |
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345 ctxt->sax->_private = ctx; |
| 2139 | 346 ctxt->replaceEntities = 1; |
| 347 ctxt->loadsubset = 1; | |
| 348 | |
| 349 ctx->ctxt = ctxt; | |
| 350 ctx->request = r; | |
| 351 } | |
| 352 | |
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353 err = xmlParseChunk(ctx->ctxt, (char *) b->pos, (int) (b->last - b->pos), |
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354 (b->last_buf) || (b->last_in_chain)); |
| 2139 | 355 |
| 356 if (err == 0) { | |
| 357 b->pos = b->last; | |
| 358 return NGX_OK; | |
| 359 } | |
| 360 | |
| 361 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 362 "xmlParseChunk() failed, error:%d", err); | |
| 363 | |
| 364 return NGX_ERROR; | |
| 365 } | |
| 366 | |
| 367 | |
| 368 static void | |
| 369 ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name, | |
| 370 const xmlChar *externalId, const xmlChar *systemId) | |
| 371 { | |
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372 xmlParserCtxtPtr ctxt = data; |
| 2139 | 373 |
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374 xmlDocPtr doc; |
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375 xmlDtdPtr dtd; |
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376 ngx_http_request_t *r; |
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377 ngx_http_xslt_filter_ctx_t *ctx; |
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378 ngx_http_xslt_filter_loc_conf_t *conf; |
| 2139 | 379 |
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380 ctx = ctxt->sax->_private; |
| 2139 | 381 r = ctx->request; |
| 382 | |
| 383 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module); | |
| 384 | |
| 385 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 386 "xslt filter extSubset: \"%s\" \"%s\" \"%s\"", | |
| 387 name ? name : (xmlChar *) "", | |
| 388 externalId ? externalId : (xmlChar *) "", | |
| 389 systemId ? systemId : (xmlChar *) ""); | |
| 390 | |
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391 doc = ctxt->myDoc; |
| 2139 | 392 |
| 393 #if (NGX_HTTP_XSLT_REUSE_DTD) | |
| 394 | |
| 395 dtd = conf->dtd; | |
| 396 | |
| 397 #else | |
| 398 | |
| 399 dtd = xmlCopyDtd(conf->dtd); | |
| 400 if (dtd == NULL) { | |
| 401 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 402 "xmlCopyDtd() failed"); | |
| 403 return; | |
| 404 } | |
| 405 | |
| 406 if (doc->children == NULL) { | |
| 407 xmlAddChild((xmlNodePtr) doc, (xmlNodePtr) dtd); | |
| 408 | |
| 409 } else { | |
| 410 xmlAddPrevSibling(doc->children, (xmlNodePtr) dtd); | |
| 411 } | |
| 412 | |
| 413 #endif | |
| 414 | |
| 415 doc->extSubset = dtd; | |
| 416 } | |
| 417 | |
| 418 | |
| 419 static void ngx_cdecl | |
| 420 ngx_http_xslt_sax_error(void *data, const char *msg, ...) | |
| 421 { | |
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422 xmlParserCtxtPtr ctxt = data; |
| 2139 | 423 |
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424 size_t n; |
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425 va_list args; |
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426 ngx_http_xslt_filter_ctx_t *ctx; |
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427 u_char buf[NGX_MAX_ERROR_STR]; |
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428 |
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429 ctx = ctxt->sax->_private; |
| 2139 | 430 |
| 431 buf[0] = '\0'; | |
| 432 | |
| 433 va_start(args, msg); | |
| 434 n = (size_t) vsnprintf((char *) buf, NGX_MAX_ERROR_STR, msg, args); | |
| 435 va_end(args); | |
| 436 | |
| 437 while (--n && (buf[n] == CR || buf[n] == LF)) { /* void */ } | |
| 438 | |
| 439 ngx_log_error(NGX_LOG_ERR, ctx->request->connection->log, 0, | |
| 2999 | 440 "libxml2 error: \"%*s\"", n + 1, buf); |
| 2139 | 441 } |
| 442 | |
| 443 | |
| 444 static ngx_buf_t * | |
| 445 ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r, | |
| 446 ngx_http_xslt_filter_ctx_t *ctx) | |
| 447 { | |
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448 int len, rc, doc_type; |
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449 u_char *type, *encoding; |
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450 ngx_buf_t *b; |
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451 ngx_uint_t i; |
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452 xmlChar *buf; |
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453 xmlDocPtr doc, res; |
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454 ngx_http_xslt_sheet_t *sheet; |
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455 ngx_http_xslt_filter_loc_conf_t *conf; |
| 2139 | 456 |
| 457 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module); | |
| 458 sheet = conf->sheets.elts; | |
| 459 doc = ctx->doc; | |
| 460 | |
| 461 /* preallocate array for 4 params */ | |
| 462 | |
| 463 if (ngx_array_init(&ctx->params, r->pool, 4 * 2 + 1, sizeof(char *)) | |
| 464 != NGX_OK) | |
| 465 { | |
| 466 xmlFreeDoc(doc); | |
| 467 return NULL; | |
| 468 } | |
| 469 | |
| 470 for (i = 0; i < conf->sheets.nelts; i++) { | |
| 471 | |
| 472 if (ngx_http_xslt_params(r, ctx, &sheet[i].params) != NGX_OK) { | |
| 473 xmlFreeDoc(doc); | |
| 474 return NULL; | |
| 475 } | |
| 476 | |
| 477 res = xsltApplyStylesheet(sheet[i].stylesheet, doc, ctx->params.elts); | |
| 478 | |
| 479 xmlFreeDoc(doc); | |
| 480 | |
| 481 if (res == NULL) { | |
| 482 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 483 "xsltApplyStylesheet() failed"); | |
| 484 return NULL; | |
| 485 } | |
| 486 | |
| 487 doc = res; | |
| 488 | |
| 489 /* reset array elements */ | |
| 490 ctx->params.nelts = 0; | |
| 491 } | |
| 492 | |
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493 /* there must be at least one stylesheet */ |
| 2139 | 494 |
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495 if (r == r->main) { |
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496 type = ngx_http_xslt_content_type(sheet[i - 1].stylesheet); |
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497 |
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498 } else { |
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499 type = NULL; |
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500 } |
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501 |
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502 encoding = ngx_http_xslt_encoding(sheet[i - 1].stylesheet); |
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503 doc_type = doc->type; |
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504 |
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505 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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506 "xslt filter type: %d t:%s e:%s", |
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507 doc_type, type ? type : (u_char *) "(null)", |
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508 encoding ? encoding : (u_char *) "(null)"); |
| 2139 | 509 |
| 510 rc = xsltSaveResultToString(&buf, &len, doc, sheet[i - 1].stylesheet); | |
| 511 | |
| 512 xmlFreeDoc(doc); | |
| 513 | |
| 514 if (rc != 0) { | |
| 515 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 516 "xsltSaveResultToString() failed"); | |
| 517 return NULL; | |
| 518 } | |
| 519 | |
| 520 if (len == 0) { | |
| 521 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 522 "xsltSaveResultToString() returned zero-length result"); | |
| 523 return NULL; | |
| 524 } | |
| 525 | |
| 526 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); | |
| 527 if (b == NULL) { | |
| 528 ngx_free(buf); | |
| 529 return NULL; | |
| 530 } | |
| 531 | |
| 532 b->pos = buf; | |
| 533 b->last = buf + len; | |
| 534 b->memory = 1; | |
| 535 | |
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536 if (encoding) { |
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537 r->headers_out.charset.len = ngx_strlen(encoding); |
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538 r->headers_out.charset.data = encoding; |
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539 } |
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540 |
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541 if (r != r->main) { |
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542 return b; |
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543 } |
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544 |
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545 b->last_buf = 1; |
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546 |
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547 if (type) { |
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548 len = ngx_strlen(type); |
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549 |
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550 r->headers_out.content_type_len = len; |
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551 r->headers_out.content_type.len = len; |
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552 r->headers_out.content_type.data = type; |
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553 |
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554 } else if (doc_type == XML_HTML_DOCUMENT_NODE) { |
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555 |
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556 r->headers_out.content_type_len = sizeof("text/html") - 1; |
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557 ngx_str_set(&r->headers_out.content_type, "text/html"); |
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558 } |
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559 |
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560 r->headers_out.content_type_lowcase = NULL; |
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561 |
| 2139 | 562 return b; |
| 563 } | |
| 564 | |
| 565 | |
| 566 static ngx_int_t | |
| 567 ngx_http_xslt_params(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx, | |
| 568 ngx_array_t *params) | |
| 569 { | |
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570 u_char *p, *last, *value, *dst, *src, **s; |
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571 size_t len; |
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572 ngx_uint_t i; |
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573 ngx_str_t string; |
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574 ngx_http_complex_value_t *param; |
| 2139 | 575 |
| 576 param = params->elts; | |
| 577 | |
| 578 for (i = 0; i < params->nelts; i++) { | |
| 579 | |
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580 if (ngx_http_complex_value(r, ¶m[i], &string) != NGX_OK) { |
| 2139 | 581 return NGX_ERROR; |
| 582 } | |
| 583 | |
| 584 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 585 "xslt filter param: \"%s\"", string.data); | |
| 586 | |
| 587 p = string.data; | |
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588 last = string.data + string.len - 1; |
| 2139 | 589 |
| 590 while (p && *p) { | |
| 591 | |
| 592 value = p; | |
| 593 p = (u_char *) ngx_strchr(p, '='); | |
| 594 if (p == NULL) { | |
| 595 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 596 "invalid libxslt parameter \"%s\"", value); | |
| 597 return NGX_ERROR; | |
| 598 } | |
| 599 *p++ = '\0'; | |
| 600 | |
| 601 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 602 "xslt filter param name: \"%s\"", value); | |
| 603 | |
| 604 s = ngx_array_push(&ctx->params); | |
| 605 if (s == NULL) { | |
| 606 return NGX_ERROR; | |
| 607 } | |
| 608 | |
| 609 *s = value; | |
| 610 | |
| 611 value = p; | |
| 612 p = (u_char *) ngx_strchr(p, ':'); | |
| 613 | |
| 614 if (p) { | |
| 615 len = p - value; | |
| 616 *p++ = '\0'; | |
| 617 | |
| 618 } else { | |
| 619 len = last - value; | |
| 620 } | |
| 621 | |
| 622 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 623 "xslt filter param value: \"%s\"", value); | |
| 624 | |
| 625 dst = value; | |
| 626 src = value; | |
| 627 | |
| 628 ngx_unescape_uri(&dst, &src, len, 0); | |
| 629 | |
| 630 *dst = '\0'; | |
| 631 | |
| 632 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 633 "xslt filter param unescaped: \"%s\"", value); | |
| 634 | |
| 635 s = ngx_array_push(&ctx->params); | |
| 636 if (s == NULL) { | |
| 637 return NGX_ERROR; | |
| 638 } | |
| 639 | |
| 640 *s = value; | |
| 641 } | |
| 642 } | |
| 643 | |
| 644 s = ngx_array_push(&ctx->params); | |
| 645 if (s == NULL) { | |
| 646 return NGX_ERROR; | |
| 647 } | |
| 648 | |
| 649 *s = NULL; | |
| 650 | |
| 651 return NGX_OK; | |
| 652 } | |
| 653 | |
| 654 | |
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655 static u_char * |
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656 ngx_http_xslt_content_type(xsltStylesheetPtr s) |
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657 { |
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658 u_char *type; |
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659 |
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660 if (s->mediaType) { |
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661 return s->mediaType; |
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662 } |
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663 |
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664 for (s = s->imports; s; s = s->next) { |
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665 |
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666 type = ngx_http_xslt_content_type(s); |
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667 |
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668 if (type) { |
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669 return type; |
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670 } |
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671 } |
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672 |
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673 return NULL; |
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674 } |
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675 |
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676 |
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677 static u_char * |
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678 ngx_http_xslt_encoding(xsltStylesheetPtr s) |
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679 { |
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680 u_char *encoding; |
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681 |
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682 if (s->encoding) { |
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683 return s->encoding; |
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684 } |
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685 |
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686 for (s = s->imports; s; s = s->next) { |
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687 |
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688 encoding = ngx_http_xslt_encoding(s); |
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689 |
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690 if (encoding) { |
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691 return encoding; |
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692 } |
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693 } |
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694 |
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695 return NULL; |
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696 } |
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697 |
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698 |
| 2139 | 699 static void |
| 700 ngx_http_xslt_cleanup(void *data) | |
| 701 { | |
| 702 ngx_free(data); | |
| 703 } | |
| 704 | |
| 705 | |
| 706 static char * | |
| 707 ngx_http_xslt_entities(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 708 { | |
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709 ngx_http_xslt_filter_loc_conf_t *xlcf = conf; |
| 2139 | 710 |
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711 ngx_str_t *value; |
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712 ngx_uint_t i; |
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713 ngx_pool_cleanup_t *cln; |
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714 ngx_http_xslt_file_t *file; |
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715 ngx_http_xslt_filter_main_conf_t *xmcf; |
| 2139 | 716 |
| 717 if (xlcf->dtd) { | |
| 718 return "is duplicate"; | |
| 719 } | |
| 720 | |
| 721 value = cf->args->elts; | |
| 722 | |
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723 xmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_xslt_filter_module); |
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724 |
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725 file = xmcf->dtd_files.elts; |
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726 for (i = 0; i < xmcf->dtd_files.nelts; i++) { |
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727 if (ngx_strcmp(file[i].name, &value[1].data) == 0) { |
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728 xlcf->dtd = file[i].data; |
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729 return NGX_CONF_OK; |
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730 } |
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731 } |
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732 |
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733 cln = ngx_pool_cleanup_add(cf->pool, 0); |
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734 if (cln == NULL) { |
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735 return NGX_CONF_ERROR; |
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736 } |
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737 |
| 2139 | 738 xlcf->dtd = xmlParseDTD(NULL, (xmlChar *) value[1].data); |
| 739 | |
| 740 if (xlcf->dtd == NULL) { | |
| 741 ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "xmlParseDTD() failed"); | |
| 742 return NGX_CONF_ERROR; | |
| 743 } | |
| 744 | |
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745 cln->handler = ngx_http_xslt_cleanup_dtd; |
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746 cln->data = xlcf->dtd; |
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747 |
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748 file = ngx_array_push(&xmcf->dtd_files); |
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749 if (file == NULL) { |
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750 return NGX_CONF_ERROR; |
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751 } |
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752 |
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753 file->name = value[1].data; |
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754 file->data = xlcf->dtd; |
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755 |
| 2139 | 756 return NGX_CONF_OK; |
| 757 } | |
| 758 | |
| 759 | |
| 760 | |
| 761 static char * | |
| 762 ngx_http_xslt_stylesheet(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 763 { | |
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764 ngx_http_xslt_filter_loc_conf_t *xlcf = conf; |
| 2139 | 765 |
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766 ngx_str_t *value; |
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767 ngx_uint_t i, n; |
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768 ngx_pool_cleanup_t *cln; |
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769 ngx_http_xslt_file_t *file; |
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770 ngx_http_xslt_sheet_t *sheet; |
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771 ngx_http_complex_value_t *param; |
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772 ngx_http_compile_complex_value_t ccv; |
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773 ngx_http_xslt_filter_main_conf_t *xmcf; |
| 2139 | 774 |
| 775 value = cf->args->elts; | |
| 776 | |
| 777 if (xlcf->sheets.elts == NULL) { | |
| 778 if (ngx_array_init(&xlcf->sheets, cf->pool, 1, | |
| 779 sizeof(ngx_http_xslt_sheet_t)) | |
| 780 != NGX_OK) | |
| 781 { | |
| 782 return NGX_CONF_ERROR; | |
| 783 } | |
| 784 } | |
| 785 | |
| 786 sheet = ngx_array_push(&xlcf->sheets); | |
| 787 if (sheet == NULL) { | |
| 788 return NGX_CONF_ERROR; | |
| 789 } | |
| 790 | |
| 791 ngx_memzero(sheet, sizeof(ngx_http_xslt_sheet_t)); | |
| 792 | |
| 793 if (ngx_conf_full_name(cf->cycle, &value[1], 0) != NGX_OK) { | |
| 794 return NGX_CONF_ERROR; | |
| 795 } | |
| 796 | |
|
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797 xmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_xslt_filter_module); |
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798 |
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799 file = xmcf->sheet_files.elts; |
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800 for (i = 0; i < xmcf->sheet_files.nelts; i++) { |
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801 if (ngx_strcmp(file[i].name, &value[1].data) == 0) { |
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802 sheet->stylesheet = file[i].data; |
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803 goto found; |
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804 } |
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805 } |
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806 |
| 2139 | 807 cln = ngx_pool_cleanup_add(cf->pool, 0); |
| 808 if (cln == NULL) { | |
| 809 return NGX_CONF_ERROR; | |
| 810 } | |
| 811 | |
| 812 sheet->stylesheet = xsltParseStylesheetFile(value[1].data); | |
| 813 if (sheet->stylesheet == NULL) { | |
| 814 ngx_conf_log_error(NGX_LOG_ERR, cf, 0, | |
| 815 "xsltParseStylesheetFile(\"%s\") failed", | |
| 816 value[1].data); | |
| 817 return NGX_CONF_ERROR; | |
| 818 } | |
| 819 | |
| 820 cln->handler = ngx_http_xslt_cleanup_stylesheet; | |
| 821 cln->data = sheet->stylesheet; | |
| 822 | |
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823 file = ngx_array_push(&xmcf->sheet_files); |
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824 if (file == NULL) { |
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825 return NGX_CONF_ERROR; |
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826 } |
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827 |
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828 file->name = value[1].data; |
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829 file->data = sheet->stylesheet; |
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830 |
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831 found: |
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832 |
| 2139 | 833 n = cf->args->nelts; |
| 834 | |
| 835 if (n == 2) { | |
| 836 return NGX_CONF_OK; | |
| 837 } | |
| 838 | |
| 839 if (ngx_array_init(&sheet->params, cf->pool, n - 2, | |
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840 sizeof(ngx_http_complex_value_t)) |
| 2139 | 841 != NGX_OK) |
| 842 { | |
| 843 return NGX_CONF_ERROR; | |
| 844 } | |
| 845 | |
| 846 for (i = 2; i < n; i++) { | |
| 847 | |
| 848 param = ngx_array_push(&sheet->params); | |
| 849 if (param == NULL) { | |
| 850 return NGX_CONF_ERROR; | |
| 851 } | |
| 852 | |
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853 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
| 2139 | 854 |
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855 ccv.cf = cf; |
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856 ccv.value = &value[i]; |
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857 ccv.complex_value = param; |
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858 ccv.zero = 1; |
| 2139 | 859 |
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860 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
| 2139 | 861 return NGX_CONF_ERROR; |
| 862 } | |
| 863 } | |
| 864 | |
| 865 return NGX_CONF_OK; | |
| 866 } | |
| 867 | |
| 868 | |
| 869 static void | |
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870 ngx_http_xslt_cleanup_dtd(void *data) |
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871 { |
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872 xmlFreeDtd(data); |
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873 } |
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874 |
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875 |
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876 static void |
| 2139 | 877 ngx_http_xslt_cleanup_stylesheet(void *data) |
| 878 { | |
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879 xsltFreeStylesheet(data); |
| 2139 | 880 } |
| 881 | |
| 882 | |
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883 static void * |
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884 ngx_http_xslt_filter_create_main_conf(ngx_conf_t *cf) |
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885 { |
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886 ngx_http_xslt_filter_main_conf_t *conf; |
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887 |
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888 conf = ngx_palloc(cf->pool, sizeof(ngx_http_xslt_filter_main_conf_t)); |
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889 if (conf == NULL) { |
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890 return NULL; |
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891 } |
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892 |
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893 if (ngx_array_init(&conf->dtd_files, cf->pool, 1, |
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894 sizeof(ngx_http_xslt_file_t)) |
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895 != NGX_OK) |
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896 { |
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897 return NULL; |
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898 } |
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899 |
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900 if (ngx_array_init(&conf->sheet_files, cf->pool, 1, |
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901 sizeof(ngx_http_xslt_file_t)) |
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902 != NGX_OK) |
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903 { |
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904 return NULL; |
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905 } |
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906 |
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907 return conf; |
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908 } |
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909 |
| 2139 | 910 |
| 911 static void * | |
| 912 ngx_http_xslt_filter_create_conf(ngx_conf_t *cf) | |
| 913 { | |
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914 ngx_http_xslt_filter_loc_conf_t *conf; |
| 2139 | 915 |
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916 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_xslt_filter_loc_conf_t)); |
| 2139 | 917 if (conf == NULL) { |
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918 return NULL; |
| 2139 | 919 } |
| 920 | |
| 921 /* | |
| 922 * set by ngx_pcalloc(): | |
| 923 * | |
| 2148 | 924 * conf->dtd = NULL; |
| 925 * conf->sheets = { NULL }; | |
| 926 * conf->types = { NULL }; | |
| 927 * conf->types_keys = NULL; | |
| 2139 | 928 */ |
| 929 | |
| 930 return conf; | |
| 931 } | |
| 932 | |
| 933 | |
| 934 static char * | |
| 935 ngx_http_xslt_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 936 { | |
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937 ngx_http_xslt_filter_loc_conf_t *prev = parent; |
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938 ngx_http_xslt_filter_loc_conf_t *conf = child; |
| 2139 | 939 |
| 940 if (conf->dtd == NULL) { | |
| 941 conf->dtd = prev->dtd; | |
| 942 } | |
| 943 | |
| 944 if (conf->sheets.nelts == 0) { | |
| 945 conf->sheets = prev->sheets; | |
| 946 } | |
| 947 | |
|
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948 if (ngx_http_merge_types(cf, &conf->types_keys, &conf->types, |
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|
949 &prev->types_keys, &prev->types, |
| 2148 | 950 ngx_http_xslt_default_types) |
| 2139 | 951 != NGX_OK) |
| 952 { | |
| 953 return NGX_CONF_ERROR; | |
| 954 } | |
| 955 | |
| 956 return NGX_CONF_OK; | |
| 957 } | |
| 958 | |
| 959 | |
| 960 static ngx_int_t | |
| 961 ngx_http_xslt_filter_init(ngx_conf_t *cf) | |
| 962 { | |
| 963 xmlInitParser(); | |
| 964 | |
| 2299 | 965 #if (NGX_HAVE_EXSLT) |
| 966 exsltRegisterAll(); | |
| 967 #endif | |
| 968 | |
| 2139 | 969 ngx_http_next_header_filter = ngx_http_top_header_filter; |
| 970 ngx_http_top_header_filter = ngx_http_xslt_header_filter; | |
| 971 | |
| 972 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
| 973 ngx_http_top_body_filter = ngx_http_xslt_body_filter; | |
| 974 | |
| 975 return NGX_OK; | |
| 976 } | |
| 977 | |
| 978 | |
| 979 static void | |
| 980 ngx_http_xslt_filter_exit(ngx_cycle_t *cycle) | |
| 981 { | |
| 982 xsltCleanupGlobals(); | |
| 983 xmlCleanupParser(); | |
| 984 } |