Mercurial > hg > nginx
annotate src/http/modules/ngx_http_xslt_filter_module.c @ 2483:29494780d978
free addrs only it has been allocated before: non single address
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Thu, 29 Jan 2009 14:32:58 +0000 |
parents | 3e213fa0cbb3 |
children | a6954ce88b80 |
rev | line source |
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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 ngx_array_t *lengths; |
42 ngx_array_t *values; | |
43 } ngx_http_xslt_param_t; | |
44 | |
45 | |
46 typedef struct { | |
47 xsltStylesheetPtr stylesheet; | |
48 ngx_array_t params; /* ngx_http_xslt_param_t */ | |
49 } ngx_http_xslt_sheet_t; | |
50 | |
51 | |
52 typedef struct { | |
53 xmlDtdPtr dtd; | |
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54 ngx_array_t sheets; /* ngx_http_xslt_sheet_t */ |
2148 | 55 ngx_hash_t types; |
56 ngx_array_t *types_keys; | |
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57 } ngx_http_xslt_filter_loc_conf_t; |
2139 | 58 |
59 | |
60 typedef struct { | |
61 xmlDocPtr doc; | |
62 xmlParserCtxtPtr ctxt; | |
63 xmlSAXHandler *sax; | |
64 ngx_http_request_t *request; | |
65 ngx_array_t params; | |
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66 |
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67 ngx_uint_t done; /* unsigned done:1; */ |
2139 | 68 } ngx_http_xslt_filter_ctx_t; |
69 | |
70 | |
71 static ngx_int_t ngx_http_xslt_send(ngx_http_request_t *r, | |
72 ngx_http_xslt_filter_ctx_t *ctx, ngx_buf_t *b); | |
73 static ngx_int_t ngx_http_xslt_filter_internal_error(ngx_http_request_t *r); | |
74 static ngx_int_t ngx_http_xslt_add_chunk(ngx_http_request_t *r, | |
75 ngx_http_xslt_filter_ctx_t *ctx, ngx_buf_t *b); | |
76 | |
77 | |
78 static void ngx_http_xslt_sax_start_document(void *data); | |
79 static void ngx_http_xslt_sax_end_document(void *data); | |
80 static void ngx_http_xslt_sax_internal_subset(void *data, const xmlChar *name, | |
81 const xmlChar *externalId, const xmlChar *systemId); | |
82 static void ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name, | |
83 const xmlChar *externalId, const xmlChar *systemId); | |
84 static void ngx_http_xslt_sax_entity_decl(void *data, const xmlChar *name, | |
85 int type, const xmlChar *publicId, const xmlChar *systemId, | |
86 xmlChar *content); | |
87 static void ngx_http_xslt_sax_attribute_decl(void *data, const xmlChar *elem, | |
88 const xmlChar *fullname, int type, int def, const xmlChar *defaultValue, | |
89 xmlEnumerationPtr tree); | |
90 static void ngx_http_xslt_sax_element_decl(void *data, const xmlChar * name, | |
91 int type, xmlElementContentPtr content); | |
92 static void ngx_http_xslt_sax_notation_decl(void *data, const xmlChar *name, | |
93 const xmlChar *publicId, const xmlChar *systemId); | |
94 static void ngx_http_xslt_sax_unparsed_entity_decl(void *data, | |
95 const xmlChar *name, const xmlChar *publicId, const xmlChar *systemId, | |
96 const xmlChar *notationName); | |
97 static void ngx_http_xslt_sax_start_element(void *data, | |
98 const xmlChar *localname, const xmlChar *prefix, const xmlChar *URI, | |
99 int nb_namespaces, const xmlChar **namespaces, int nb_attributes, | |
100 int nb_defaulted, const xmlChar **attributes); | |
101 static void ngx_http_xslt_sax_end_element(void *data, | |
102 const xmlChar * localname ATTRIBUTE_UNUSED, | |
103 const xmlChar * prefix ATTRIBUTE_UNUSED, | |
104 const xmlChar * URI ATTRIBUTE_UNUSED); | |
105 static void ngx_http_xslt_sax_characters(void *data, const xmlChar *p, int len); | |
106 static void ngx_http_xslt_sax_cdata_block(void *data, const xmlChar *p, | |
107 int len); | |
108 static xmlEntityPtr ngx_http_xslt_sax_get_entity(void *data, | |
109 const xmlChar *name); | |
110 static xmlEntityPtr ngx_http_xslt_sax_get_parameter_entity(void *data, | |
111 const xmlChar *name); | |
112 static xmlParserInputPtr ngx_http_xslt_sax_resolve_entity(void *data, | |
113 const xmlChar *publicId, const xmlChar *systemId); | |
114 static void ngx_http_xslt_sax_reference(void *data, const xmlChar *name); | |
115 static void ngx_http_xslt_sax_comment(void *data, const xmlChar *value); | |
116 static void ngx_http_xslt_sax_processing_instruction(void *data, | |
117 const xmlChar *target, const xmlChar *pidata); | |
118 static int ngx_http_xslt_sax_is_standalone(void *data); | |
119 static int ngx_http_xslt_sax_has_internal_subset(void *data); | |
120 static int ngx_http_xslt_sax_has_external_subset(void *data); | |
121 static void ngx_cdecl ngx_http_xslt_sax_error(void *data, const char *msg, ...); | |
122 | |
123 | |
124 static ngx_buf_t *ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r, | |
125 ngx_http_xslt_filter_ctx_t *ctx); | |
126 static ngx_int_t ngx_http_xslt_params(ngx_http_request_t *r, | |
127 ngx_http_xslt_filter_ctx_t *ctx, ngx_array_t *params); | |
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128 static u_char *ngx_http_xslt_content_type(xsltStylesheetPtr s); |
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129 static u_char *ngx_http_xslt_encoding(xsltStylesheetPtr s); |
2139 | 130 static void ngx_http_xslt_cleanup(void *data); |
131 | |
132 static char *ngx_http_xslt_entities(ngx_conf_t *cf, ngx_command_t *cmd, | |
133 void *conf); | |
134 static char *ngx_http_xslt_stylesheet(ngx_conf_t *cf, ngx_command_t *cmd, | |
135 void *conf); | |
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136 static void ngx_http_xslt_cleanup_dtd(void *data); |
2139 | 137 static void ngx_http_xslt_cleanup_stylesheet(void *data); |
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138 static void *ngx_http_xslt_filter_create_main_conf(ngx_conf_t *cf); |
2139 | 139 static void *ngx_http_xslt_filter_create_conf(ngx_conf_t *cf); |
140 static char *ngx_http_xslt_filter_merge_conf(ngx_conf_t *cf, void *parent, | |
141 void *child); | |
142 static ngx_int_t ngx_http_xslt_filter_init(ngx_conf_t *cf); | |
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143 static void ngx_http_xslt_filter_exit(ngx_cycle_t *cycle); |
2139 | 144 |
145 | |
146 ngx_str_t ngx_http_xslt_default_types[] = { | |
147 ngx_string("text/xml"), | |
148 ngx_null_string | |
149 }; | |
150 | |
151 | |
152 static ngx_command_t ngx_http_xslt_filter_commands[] = { | |
153 | |
154 { ngx_string("xml_entities"), | |
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155 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
2139 | 156 ngx_http_xslt_entities, |
157 NGX_HTTP_LOC_CONF_OFFSET, | |
158 0, | |
159 NULL }, | |
160 | |
161 { ngx_string("xslt_stylesheet"), | |
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162 NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, |
2139 | 163 ngx_http_xslt_stylesheet, |
164 NGX_HTTP_LOC_CONF_OFFSET, | |
165 0, | |
166 NULL }, | |
167 | |
168 { ngx_string("xslt_types"), | |
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169 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, |
2139 | 170 ngx_http_types_slot, |
171 NGX_HTTP_LOC_CONF_OFFSET, | |
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172 offsetof(ngx_http_xslt_filter_loc_conf_t, types_keys), |
2139 | 173 &ngx_http_xslt_default_types[0] }, |
174 | |
175 ngx_null_command | |
176 }; | |
177 | |
178 | |
179 static ngx_http_module_t ngx_http_xslt_filter_module_ctx = { | |
180 NULL, /* preconfiguration */ | |
181 ngx_http_xslt_filter_init, /* postconfiguration */ | |
182 | |
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183 ngx_http_xslt_filter_create_main_conf, /* create main configuration */ |
2139 | 184 NULL, /* init main configuration */ |
185 | |
186 NULL, /* create server configuration */ | |
187 NULL, /* merge server configuration */ | |
188 | |
189 ngx_http_xslt_filter_create_conf, /* create location configuration */ | |
190 ngx_http_xslt_filter_merge_conf /* merge location configuration */ | |
191 }; | |
192 | |
193 | |
194 ngx_module_t ngx_http_xslt_filter_module = { | |
195 NGX_MODULE_V1, | |
196 &ngx_http_xslt_filter_module_ctx, /* module context */ | |
197 ngx_http_xslt_filter_commands, /* module directives */ | |
198 NGX_HTTP_MODULE, /* module type */ | |
199 NULL, /* init master */ | |
200 NULL, /* init module */ | |
201 NULL, /* init process */ | |
202 NULL, /* init thread */ | |
203 NULL, /* exit thread */ | |
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204 ngx_http_xslt_filter_exit, /* exit process */ |
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205 ngx_http_xslt_filter_exit, /* exit master */ |
2139 | 206 NGX_MODULE_V1_PADDING |
207 }; | |
208 | |
209 | |
210 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
211 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
212 | |
213 | |
214 static ngx_int_t | |
215 ngx_http_xslt_header_filter(ngx_http_request_t *r) | |
216 { | |
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217 ngx_http_xslt_filter_ctx_t *ctx; |
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218 ngx_http_xslt_filter_loc_conf_t *conf; |
2139 | 219 |
220 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
221 "xslt filter header"); | |
222 | |
223 if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) { | |
224 return ngx_http_next_header_filter(r); | |
225 } | |
226 | |
227 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module); | |
228 | |
229 if (conf->sheets.nelts == 0 | |
2148 | 230 || ngx_http_test_content_type(r, &conf->types) == NULL) |
2139 | 231 { |
232 return ngx_http_next_header_filter(r); | |
233 } | |
234 | |
235 ctx = ngx_http_get_module_ctx(r, ngx_http_xslt_filter_module); | |
236 | |
237 if (ctx) { | |
238 return ngx_http_next_header_filter(r); | |
239 } | |
240 | |
241 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_xslt_filter_ctx_t)); | |
242 if (ctx == NULL) { | |
243 return NGX_ERROR; | |
244 } | |
245 | |
246 ngx_http_set_ctx(r, ctx, ngx_http_xslt_filter_module); | |
247 | |
248 r->main_filter_need_in_memory = 1; | |
249 | |
250 return NGX_OK; | |
251 } | |
252 | |
253 | |
254 static ngx_int_t | |
255 ngx_http_xslt_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
256 { | |
257 ngx_chain_t *cl; | |
258 ngx_http_xslt_filter_ctx_t *ctx; | |
259 | |
260 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
261 "xslt filter body"); | |
262 | |
263 if (in == NULL) { | |
264 return ngx_http_next_body_filter(r, in); | |
265 } | |
266 | |
267 ctx = ngx_http_get_module_ctx(r, ngx_http_xslt_filter_module); | |
268 | |
269 if (ctx == NULL || ctx->done) { | |
270 return ngx_http_next_body_filter(r, in); | |
271 } | |
272 | |
273 for (cl = in; cl; cl = cl->next) { | |
274 | |
275 if (ngx_http_xslt_add_chunk(r, ctx, cl->buf) != NGX_OK) { | |
276 | |
277 if (ctx->ctxt->myDoc){ | |
278 | |
279 #if (NGX_HTTP_XSLT_REUSE_DTD) | |
280 ctx->ctxt->myDoc->extSubset = NULL; | |
281 #endif | |
282 xmlFreeDoc(ctx->ctxt->myDoc); | |
283 } | |
284 | |
285 xmlFreeParserCtxt(ctx->ctxt); | |
286 | |
287 return ngx_http_xslt_send(r, ctx, NULL); | |
288 } | |
289 | |
290 if (cl->buf->last_buf) { | |
291 | |
292 ctx->doc = ctx->ctxt->myDoc; | |
293 | |
294 #if (NGX_HTTP_XSLT_REUSE_DTD) | |
295 ctx->doc->extSubset = NULL; | |
296 #endif | |
297 | |
298 xmlFreeParserCtxt(ctx->ctxt); | |
299 | |
300 if (ctx->ctxt->wellFormed) { | |
301 return ngx_http_xslt_send(r, ctx, | |
302 ngx_http_xslt_apply_stylesheet(r, ctx)); | |
303 } | |
304 | |
305 xmlFreeDoc(ctx->doc); | |
306 | |
307 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
308 "not well formed XML document"); | |
309 | |
310 return ngx_http_xslt_send(r, ctx, NULL); | |
311 } | |
312 } | |
313 | |
314 return NGX_OK; | |
315 } | |
316 | |
317 | |
318 static ngx_int_t | |
319 ngx_http_xslt_send(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx, | |
320 ngx_buf_t *b) | |
321 { | |
322 ngx_int_t rc; | |
323 ngx_chain_t out; | |
324 ngx_pool_cleanup_t *cln; | |
325 | |
326 ctx->done = 1; | |
327 | |
328 if (b == NULL) { | |
329 return ngx_http_xslt_filter_internal_error(r); | |
330 } | |
331 | |
332 cln = ngx_pool_cleanup_add(r->pool, 0); | |
333 | |
334 if (cln == NULL) { | |
335 ngx_free(b->pos); | |
336 return ngx_http_special_response_handler(r, | |
337 NGX_HTTP_INTERNAL_SERVER_ERROR); | |
338 } | |
339 | |
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340 if (r == r->main) { |
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341 r->headers_out.content_length_n = b->last - b->pos; |
2139 | 342 |
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343 if (r->headers_out.content_length) { |
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344 r->headers_out.content_length->hash = 0; |
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345 r->headers_out.content_length = NULL; |
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346 } |
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347 |
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348 ngx_http_clear_last_modified(r); |
2139 | 349 } |
350 | |
351 rc = ngx_http_next_header_filter(r); | |
352 | |
353 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) { | |
354 ngx_free(b->pos); | |
355 return rc; | |
356 } | |
357 | |
358 cln->handler = ngx_http_xslt_cleanup; | |
359 cln->data = b->pos; | |
360 | |
361 out.buf = b; | |
362 out.next = NULL; | |
363 | |
364 return ngx_http_next_body_filter(r, &out); | |
365 } | |
366 | |
367 | |
368 static ngx_int_t | |
369 ngx_http_xslt_filter_internal_error(ngx_http_request_t *r) | |
370 { | |
371 ngx_int_t rc; | |
372 | |
373 /* clear the modules contexts */ | |
374 ngx_memzero(r->ctx, sizeof(void *) * ngx_http_max_module); | |
375 | |
376 rc = ngx_http_special_response_handler(r, NGX_HTTP_INTERNAL_SERVER_ERROR); | |
377 | |
378 /* NGX_ERROR resets any pending data */ | |
379 | |
380 return (rc == NGX_OK) ? NGX_ERROR : rc; | |
381 } | |
382 | |
383 | |
384 static ngx_int_t | |
385 ngx_http_xslt_add_chunk(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx, | |
386 ngx_buf_t *b) | |
387 { | |
388 int err; | |
389 xmlSAXHandler *sax; | |
390 xmlParserCtxtPtr ctxt; | |
391 | |
392 if (ctx->ctxt == NULL) { | |
393 | |
394 ctxt = xmlCreatePushParserCtxt(NULL, NULL, NULL, 0, NULL); | |
395 if (ctxt == NULL) { | |
396 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
397 "xmlCreatePushParserCtxt() failed"); | |
398 return NGX_ERROR; | |
399 } | |
400 | |
401 ctx->sax = ngx_palloc(r->pool, sizeof(xmlSAXHandler)); | |
402 if (ctx->sax == NULL) { | |
403 return NGX_ERROR; | |
404 } | |
405 | |
406 sax = ctxt->sax; | |
407 | |
408 ngx_memcpy(ctx->sax, sax, sizeof(xmlSAXHandler)); | |
409 | |
410 sax->startDocument = ngx_http_xslt_sax_start_document; | |
411 sax->endDocument = ngx_http_xslt_sax_end_document; | |
412 | |
413 sax->internalSubset = ngx_http_xslt_sax_internal_subset; | |
414 sax->externalSubset = ngx_http_xslt_sax_external_subset; | |
415 sax->entityDecl = ngx_http_xslt_sax_entity_decl; | |
416 sax->attributeDecl = ngx_http_xslt_sax_attribute_decl; | |
417 sax->elementDecl = ngx_http_xslt_sax_element_decl; | |
418 sax->notationDecl = ngx_http_xslt_sax_notation_decl; | |
419 sax->unparsedEntityDecl = ngx_http_xslt_sax_unparsed_entity_decl; | |
420 sax->setDocumentLocator = NULL; | |
421 | |
422 sax->startElementNs = ngx_http_xslt_sax_start_element; | |
423 sax->endElementNs = ngx_http_xslt_sax_end_element; | |
424 | |
425 sax->characters = ngx_http_xslt_sax_characters; | |
426 sax->ignorableWhitespace = ngx_http_xslt_sax_characters; | |
427 sax->cdataBlock = ngx_http_xslt_sax_cdata_block; | |
428 sax->getEntity = ngx_http_xslt_sax_get_entity; | |
429 sax->resolveEntity = ngx_http_xslt_sax_resolve_entity; | |
430 sax->getParameterEntity = ngx_http_xslt_sax_get_parameter_entity; | |
431 sax->reference = ngx_http_xslt_sax_reference; | |
432 sax->comment = ngx_http_xslt_sax_comment; | |
433 sax->processingInstruction = ngx_http_xslt_sax_processing_instruction; | |
434 | |
435 sax->isStandalone = ngx_http_xslt_sax_is_standalone; | |
436 sax->hasInternalSubset = ngx_http_xslt_sax_has_internal_subset; | |
437 sax->hasExternalSubset = ngx_http_xslt_sax_has_external_subset; | |
438 | |
439 sax->warning = NULL; | |
440 sax->error = ngx_http_xslt_sax_error; | |
441 sax->fatalError = ngx_http_xslt_sax_error; | |
442 | |
443 ctxt->userData = ctx; | |
444 | |
445 ctxt->replaceEntities = 1; | |
446 ctxt->loadsubset = 1; | |
447 | |
448 ctx->ctxt = ctxt; | |
449 ctx->request = r; | |
450 } | |
451 | |
452 err = xmlParseChunk(ctx->ctxt, (char *) b->pos, | |
453 (int) (b->last - b->pos), b->last_buf); | |
454 | |
455 if (err == 0) { | |
456 b->pos = b->last; | |
457 return NGX_OK; | |
458 } | |
459 | |
460 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
461 "xmlParseChunk() failed, error:%d", err); | |
462 | |
463 return NGX_ERROR; | |
464 } | |
465 | |
466 | |
467 static void | |
468 ngx_http_xslt_sax_start_document(void *data) | |
469 { | |
470 ngx_http_xslt_filter_ctx_t *ctx = data; | |
471 | |
472 ctx->sax->startDocument(ctx->ctxt); | |
473 } | |
474 | |
475 | |
476 static void | |
477 ngx_http_xslt_sax_end_document(void *data) | |
478 { | |
479 ngx_http_xslt_filter_ctx_t *ctx = data; | |
480 | |
481 ctx->sax->endDocument(ctx->ctxt); | |
482 } | |
483 | |
484 | |
485 static void | |
486 ngx_http_xslt_sax_internal_subset(void *data, const xmlChar *name, | |
487 const xmlChar *externalId, const xmlChar *systemId) | |
488 { | |
489 ngx_http_xslt_filter_ctx_t *ctx = data; | |
490 | |
491 ctx->sax->internalSubset(ctx->ctxt, name, externalId, systemId); | |
492 } | |
493 | |
494 | |
495 static void | |
496 ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name, | |
497 const xmlChar *externalId, const xmlChar *systemId) | |
498 { | |
499 ngx_http_xslt_filter_ctx_t *ctx = data; | |
500 | |
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501 xmlDocPtr doc; |
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502 xmlDtdPtr dtd; |
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503 ngx_http_request_t *r; |
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504 ngx_http_xslt_filter_loc_conf_t *conf; |
2139 | 505 |
506 r = ctx->request; | |
507 | |
508 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module); | |
509 | |
510 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
511 "xslt filter extSubset: \"%s\" \"%s\" \"%s\"", | |
512 name ? name : (xmlChar *) "", | |
513 externalId ? externalId : (xmlChar *) "", | |
514 systemId ? systemId : (xmlChar *) ""); | |
515 | |
516 doc = ctx->ctxt->myDoc; | |
517 | |
518 #if (NGX_HTTP_XSLT_REUSE_DTD) | |
519 | |
520 dtd = conf->dtd; | |
521 | |
522 #else | |
523 | |
524 dtd = xmlCopyDtd(conf->dtd); | |
525 if (dtd == NULL) { | |
526 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
527 "xmlCopyDtd() failed"); | |
528 return; | |
529 } | |
530 | |
531 if (doc->children == NULL) { | |
532 xmlAddChild((xmlNodePtr) doc, (xmlNodePtr) dtd); | |
533 | |
534 } else { | |
535 xmlAddPrevSibling(doc->children, (xmlNodePtr) dtd); | |
536 } | |
537 | |
538 #endif | |
539 | |
540 doc->extSubset = dtd; | |
541 } | |
542 | |
543 | |
544 static void | |
545 ngx_http_xslt_sax_entity_decl(void *data, const xmlChar *name, int type, | |
546 const xmlChar *publicId, const xmlChar *systemId, xmlChar *content) | |
547 { | |
548 ngx_http_xslt_filter_ctx_t *ctx = data; | |
549 | |
550 ctx->sax->entityDecl(ctx->ctxt, name, type, publicId, systemId, content); | |
551 } | |
552 | |
553 | |
554 static void | |
555 ngx_http_xslt_sax_attribute_decl(void *data, const xmlChar *elem, | |
556 const xmlChar *fullname, int type, int def, const xmlChar *defaultValue, | |
557 xmlEnumerationPtr tree) | |
558 { | |
559 ngx_http_xslt_filter_ctx_t *ctx = data; | |
560 | |
561 ctx->sax->attributeDecl(ctx->ctxt, elem, fullname, type, def, defaultValue, | |
562 tree); | |
563 } | |
564 | |
565 | |
566 static void | |
567 ngx_http_xslt_sax_element_decl(void *data, const xmlChar * name, int type, | |
568 xmlElementContentPtr content) | |
569 { | |
570 ngx_http_xslt_filter_ctx_t *ctx = data; | |
571 | |
572 ctx->sax->elementDecl(ctx->ctxt, name, type, content); | |
573 } | |
574 | |
575 | |
576 static void | |
577 ngx_http_xslt_sax_notation_decl(void *data, const xmlChar *name, | |
578 const xmlChar *publicId, const xmlChar *systemId) | |
579 { | |
580 ngx_http_xslt_filter_ctx_t *ctx = data; | |
581 | |
582 ctx->sax->notationDecl(ctx->ctxt, name, publicId, systemId); | |
583 } | |
584 | |
585 | |
586 static void | |
587 ngx_http_xslt_sax_unparsed_entity_decl(void *data, const xmlChar *name, | |
588 const xmlChar *publicId, const xmlChar *systemId, | |
589 const xmlChar *notationName) | |
590 { | |
591 ngx_http_xslt_filter_ctx_t *ctx = data; | |
592 | |
593 ctx->sax->unparsedEntityDecl(ctx->ctxt, name, publicId, systemId, | |
594 notationName); | |
595 } | |
596 | |
597 | |
598 static void | |
599 ngx_http_xslt_sax_start_element(void *data, const xmlChar *localname, | |
600 const xmlChar *prefix, const xmlChar *URI, int nb_namespaces, | |
601 const xmlChar **namespaces, int nb_attributes, int nb_defaulted, | |
602 const xmlChar **attributes) | |
603 { | |
604 ngx_http_xslt_filter_ctx_t *ctx = data; | |
605 | |
606 ctx->sax->startElementNs(ctx->ctxt, localname, prefix, URI, nb_namespaces, | |
607 namespaces, nb_attributes, nb_defaulted, attributes); | |
608 } | |
609 | |
610 | |
611 static void | |
612 ngx_http_xslt_sax_end_element(void *data, | |
613 const xmlChar * localname ATTRIBUTE_UNUSED, | |
614 const xmlChar * prefix ATTRIBUTE_UNUSED, | |
615 const xmlChar * URI ATTRIBUTE_UNUSED) | |
616 { | |
617 ngx_http_xslt_filter_ctx_t *ctx = data; | |
618 | |
619 ctx->sax->endElementNs(ctx->ctxt, localname, prefix, URI); | |
620 } | |
621 | |
622 | |
623 static void | |
624 ngx_http_xslt_sax_characters(void *data, const xmlChar *p, int len) | |
625 { | |
626 ngx_http_xslt_filter_ctx_t *ctx = data; | |
627 | |
628 ctx->sax->characters(ctx->ctxt, p, len); | |
629 } | |
630 | |
631 | |
632 static void | |
633 ngx_http_xslt_sax_cdata_block(void *data, const xmlChar *p, int len) | |
634 { | |
635 ngx_http_xslt_filter_ctx_t *ctx = data; | |
636 | |
637 ctx->sax->cdataBlock(ctx->ctxt, p, len); | |
638 } | |
639 | |
640 | |
641 static xmlEntityPtr | |
642 ngx_http_xslt_sax_get_entity(void *data, const xmlChar *name) | |
643 { | |
644 ngx_http_xslt_filter_ctx_t *ctx = data; | |
645 | |
646 return ctx->sax->getEntity(ctx->ctxt, name); | |
647 } | |
648 | |
649 | |
650 static xmlEntityPtr | |
651 ngx_http_xslt_sax_get_parameter_entity(void *data, const xmlChar *name) | |
652 { | |
653 ngx_http_xslt_filter_ctx_t *ctx = data; | |
654 | |
655 return ctx->sax->getParameterEntity(ctx->ctxt, name); | |
656 } | |
657 | |
658 | |
659 static xmlParserInputPtr | |
660 ngx_http_xslt_sax_resolve_entity(void *data, const xmlChar *publicId, | |
661 const xmlChar *systemId) | |
662 { | |
663 ngx_http_xslt_filter_ctx_t *ctx = data; | |
664 | |
665 return ctx->sax->resolveEntity(ctx->ctxt, publicId, systemId); | |
666 } | |
667 | |
668 | |
669 static void | |
670 ngx_http_xslt_sax_reference(void *data, const xmlChar *name) | |
671 { | |
672 ngx_http_xslt_filter_ctx_t *ctx = data; | |
673 | |
674 ctx->sax->reference(ctx->ctxt, name); | |
675 } | |
676 | |
677 | |
678 static void | |
679 ngx_http_xslt_sax_comment(void *data, const xmlChar *value) | |
680 { | |
681 ngx_http_xslt_filter_ctx_t *ctx = data; | |
682 | |
683 ctx->sax->comment(ctx->ctxt, value); | |
684 } | |
685 | |
686 | |
687 static void | |
688 ngx_http_xslt_sax_processing_instruction(void *data, const xmlChar *target, | |
689 const xmlChar *pidata) | |
690 { | |
691 ngx_http_xslt_filter_ctx_t *ctx = data; | |
692 | |
693 ctx->sax->processingInstruction(ctx->ctxt, target, pidata); | |
694 } | |
695 | |
696 | |
697 static int | |
698 ngx_http_xslt_sax_is_standalone(void *data) | |
699 { | |
700 ngx_http_xslt_filter_ctx_t *ctx = data; | |
701 | |
702 return ctx->sax->isStandalone(ctx->ctxt); | |
703 } | |
704 | |
705 | |
706 static int | |
707 ngx_http_xslt_sax_has_internal_subset(void *data) | |
708 { | |
709 ngx_http_xslt_filter_ctx_t *ctx = data; | |
710 | |
711 return ctx->sax->hasInternalSubset(ctx->ctxt); | |
712 } | |
713 | |
714 | |
715 static int | |
716 ngx_http_xslt_sax_has_external_subset(void *data) | |
717 { | |
718 ngx_http_xslt_filter_ctx_t *ctx = data; | |
719 | |
720 return ctx->sax->hasExternalSubset(ctx->ctxt); | |
721 } | |
722 | |
723 | |
724 static void ngx_cdecl | |
725 ngx_http_xslt_sax_error(void *data, const char *msg, ...) | |
726 { | |
727 ngx_http_xslt_filter_ctx_t *ctx = data; | |
728 | |
729 size_t n; | |
730 va_list args; | |
731 u_char buf[NGX_MAX_ERROR_STR]; | |
732 | |
733 buf[0] = '\0'; | |
734 | |
735 va_start(args, msg); | |
736 n = (size_t) vsnprintf((char *) buf, NGX_MAX_ERROR_STR, msg, args); | |
737 va_end(args); | |
738 | |
739 while (--n && (buf[n] == CR || buf[n] == LF)) { /* void */ } | |
740 | |
741 ngx_log_error(NGX_LOG_ERR, ctx->request->connection->log, 0, | |
742 "libxml2 error: \"%*s\"", n, buf); | |
743 } | |
744 | |
745 | |
746 static ngx_buf_t * | |
747 ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r, | |
748 ngx_http_xslt_filter_ctx_t *ctx) | |
749 { | |
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750 int len, rc, doc_type; |
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751 u_char *type, *encoding; |
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752 ngx_buf_t *b; |
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753 ngx_uint_t i; |
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754 xmlChar *buf; |
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755 xmlDocPtr doc, res; |
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756 ngx_http_xslt_sheet_t *sheet; |
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757 ngx_http_xslt_filter_loc_conf_t *conf; |
2139 | 758 |
759 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module); | |
760 sheet = conf->sheets.elts; | |
761 doc = ctx->doc; | |
762 | |
763 /* preallocate array for 4 params */ | |
764 | |
765 if (ngx_array_init(&ctx->params, r->pool, 4 * 2 + 1, sizeof(char *)) | |
766 != NGX_OK) | |
767 { | |
768 xmlFreeDoc(doc); | |
769 return NULL; | |
770 } | |
771 | |
772 for (i = 0; i < conf->sheets.nelts; i++) { | |
773 | |
774 if (ngx_http_xslt_params(r, ctx, &sheet[i].params) != NGX_OK) { | |
775 xmlFreeDoc(doc); | |
776 return NULL; | |
777 } | |
778 | |
779 res = xsltApplyStylesheet(sheet[i].stylesheet, doc, ctx->params.elts); | |
780 | |
781 xmlFreeDoc(doc); | |
782 | |
783 if (res == NULL) { | |
784 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
785 "xsltApplyStylesheet() failed"); | |
786 return NULL; | |
787 } | |
788 | |
789 doc = res; | |
790 | |
791 /* reset array elements */ | |
792 ctx->params.nelts = 0; | |
793 } | |
794 | |
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795 /* there must be at least one stylesheet */ |
2139 | 796 |
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797 if (r == r->main) { |
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798 type = ngx_http_xslt_content_type(sheet[i - 1].stylesheet); |
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799 |
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800 } else { |
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801 type = NULL; |
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802 } |
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803 |
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804 encoding = ngx_http_xslt_encoding(sheet[i - 1].stylesheet); |
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805 doc_type = doc->type; |
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806 |
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807 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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808 "xslt filter type: %d t:%s e:%s", |
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809 doc_type, type ? type : (u_char *) "(null)", |
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810 encoding ? encoding : (u_char *) "(null)"); |
2139 | 811 |
812 rc = xsltSaveResultToString(&buf, &len, doc, sheet[i - 1].stylesheet); | |
813 | |
814 xmlFreeDoc(doc); | |
815 | |
816 if (rc != 0) { | |
817 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
818 "xsltSaveResultToString() failed"); | |
819 return NULL; | |
820 } | |
821 | |
822 if (len == 0) { | |
823 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
824 "xsltSaveResultToString() returned zero-length result"); | |
825 return NULL; | |
826 } | |
827 | |
828 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); | |
829 if (b == NULL) { | |
830 ngx_free(buf); | |
831 return NULL; | |
832 } | |
833 | |
834 b->pos = buf; | |
835 b->last = buf + len; | |
836 b->memory = 1; | |
837 b->last_buf = 1; | |
838 | |
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839 if (encoding) { |
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840 r->headers_out.charset.len = ngx_strlen(encoding); |
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841 r->headers_out.charset.data = encoding; |
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842 } |
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843 |
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844 if (r != r->main) { |
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845 return b; |
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846 } |
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847 |
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848 if (type) { |
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849 len = ngx_strlen(type); |
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850 |
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851 r->headers_out.content_type_len = len; |
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852 r->headers_out.content_type.len = len; |
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853 r->headers_out.content_type.data = type; |
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854 |
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855 } else if (doc_type == XML_HTML_DOCUMENT_NODE) { |
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856 |
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857 r->headers_out.content_type_len = sizeof("text/html") - 1; |
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858 r->headers_out.content_type.len = sizeof("text/html") - 1; |
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859 r->headers_out.content_type.data = (u_char *) "text/html"; |
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860 } |
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861 |
2139 | 862 return b; |
863 } | |
864 | |
865 | |
866 static ngx_int_t | |
867 ngx_http_xslt_params(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx, | |
868 ngx_array_t *params) | |
869 { | |
870 u_char *p, *last, *value, *dst, *src, **s; | |
871 size_t len; | |
872 ngx_uint_t i; | |
873 ngx_str_t string; | |
874 ngx_http_xslt_param_t *param; | |
875 | |
876 param = params->elts; | |
877 | |
878 for (i = 0; i < params->nelts; i++) { | |
879 | |
880 if (ngx_http_script_run(r, &string, param[i].lengths->elts, 1, | |
881 param[i].values->elts) | |
882 == NULL) | |
883 { | |
884 return NGX_ERROR; | |
885 } | |
886 | |
887 last = string.data + string.len - 1; | |
888 *last = '\0'; | |
889 | |
890 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
891 "xslt filter param: \"%s\"", string.data); | |
892 | |
893 p = string.data; | |
894 | |
895 while (p && *p) { | |
896 | |
897 value = p; | |
898 p = (u_char *) ngx_strchr(p, '='); | |
899 if (p == NULL) { | |
900 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
901 "invalid libxslt parameter \"%s\"", value); | |
902 return NGX_ERROR; | |
903 } | |
904 *p++ = '\0'; | |
905 | |
906 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
907 "xslt filter param name: \"%s\"", value); | |
908 | |
909 s = ngx_array_push(&ctx->params); | |
910 if (s == NULL) { | |
911 return NGX_ERROR; | |
912 } | |
913 | |
914 *s = value; | |
915 | |
916 value = p; | |
917 p = (u_char *) ngx_strchr(p, ':'); | |
918 | |
919 if (p) { | |
920 len = p - value; | |
921 *p++ = '\0'; | |
922 | |
923 } else { | |
924 len = last - value; | |
925 } | |
926 | |
927 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
928 "xslt filter param value: \"%s\"", value); | |
929 | |
930 dst = value; | |
931 src = value; | |
932 | |
933 ngx_unescape_uri(&dst, &src, len, 0); | |
934 | |
935 *dst = '\0'; | |
936 | |
937 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
938 "xslt filter param unescaped: \"%s\"", value); | |
939 | |
940 s = ngx_array_push(&ctx->params); | |
941 if (s == NULL) { | |
942 return NGX_ERROR; | |
943 } | |
944 | |
945 *s = value; | |
946 } | |
947 } | |
948 | |
949 s = ngx_array_push(&ctx->params); | |
950 if (s == NULL) { | |
951 return NGX_ERROR; | |
952 } | |
953 | |
954 *s = NULL; | |
955 | |
956 return NGX_OK; | |
957 } | |
958 | |
959 | |
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960 static u_char * |
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961 ngx_http_xslt_content_type(xsltStylesheetPtr s) |
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962 { |
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963 u_char *type; |
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964 |
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965 if (s->mediaType) { |
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966 return s->mediaType; |
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967 } |
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968 |
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969 for (s = s->imports; s; s = s->next) { |
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970 |
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971 type = ngx_http_xslt_content_type(s); |
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972 |
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973 if (type) { |
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974 return type; |
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975 } |
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976 } |
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977 |
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978 return NULL; |
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979 } |
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980 |
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981 |
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982 static u_char * |
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983 ngx_http_xslt_encoding(xsltStylesheetPtr s) |
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984 { |
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985 u_char *encoding; |
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986 |
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987 if (s->encoding) { |
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988 return s->encoding; |
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989 } |
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990 |
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991 for (s = s->imports; s; s = s->next) { |
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992 |
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993 encoding = ngx_http_xslt_encoding(s); |
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994 |
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995 if (encoding) { |
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996 return encoding; |
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997 } |
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998 } |
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999 |
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1000 return NULL; |
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1001 } |
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1002 |
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1003 |
2139 | 1004 static void |
1005 ngx_http_xslt_cleanup(void *data) | |
1006 { | |
1007 ngx_free(data); | |
1008 } | |
1009 | |
1010 | |
1011 static char * | |
1012 ngx_http_xslt_entities(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
1013 { | |
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1014 ngx_http_xslt_filter_loc_conf_t *xlcf = conf; |
2139 | 1015 |
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1016 ngx_str_t *value; |
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1017 ngx_uint_t i; |
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1018 ngx_pool_cleanup_t *cln; |
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1019 ngx_http_xslt_file_t *file; |
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1020 ngx_http_xslt_filter_main_conf_t *xmcf; |
2139 | 1021 |
1022 if (xlcf->dtd) { | |
1023 return "is duplicate"; | |
1024 } | |
1025 | |
1026 value = cf->args->elts; | |
1027 | |
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1028 xmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_xslt_filter_module); |
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1029 |
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1030 file = xmcf->dtd_files.elts; |
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1031 for (i = 0; i < xmcf->dtd_files.nelts; i++) { |
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1032 if (ngx_strcmp(file[i].name, &value[1].data) == 0) { |
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1033 xlcf->dtd = file[i].data; |
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1034 return NGX_CONF_OK; |
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1035 } |
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1036 } |
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1037 |
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1038 cln = ngx_pool_cleanup_add(cf->pool, 0); |
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1039 if (cln == NULL) { |
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1040 return NGX_CONF_ERROR; |
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1041 } |
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1042 |
2139 | 1043 xlcf->dtd = xmlParseDTD(NULL, (xmlChar *) value[1].data); |
1044 | |
1045 if (xlcf->dtd == NULL) { | |
1046 ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "xmlParseDTD() failed"); | |
1047 return NGX_CONF_ERROR; | |
1048 } | |
1049 | |
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1050 cln->handler = ngx_http_xslt_cleanup_dtd; |
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1051 cln->data = xlcf->dtd; |
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1052 |
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1053 file = ngx_array_push(&xmcf->dtd_files); |
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1054 if (file == NULL) { |
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1055 return NGX_CONF_ERROR; |
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1056 } |
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1057 |
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1058 file->name = value[1].data; |
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1059 file->data = xlcf->dtd; |
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1060 |
2139 | 1061 return NGX_CONF_OK; |
1062 } | |
1063 | |
1064 | |
1065 | |
1066 static char * | |
1067 ngx_http_xslt_stylesheet(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
1068 { | |
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1069 ngx_http_xslt_filter_loc_conf_t *xlcf = conf; |
2139 | 1070 |
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1071 ngx_str_t *value; |
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1072 ngx_uint_t i, n; |
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1073 ngx_pool_cleanup_t *cln; |
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1074 ngx_http_xslt_file_t *file; |
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1075 ngx_http_xslt_sheet_t *sheet; |
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1076 ngx_http_xslt_param_t *param; |
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1077 ngx_http_script_compile_t sc; |
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1078 ngx_http_xslt_filter_main_conf_t *xmcf; |
2139 | 1079 |
1080 value = cf->args->elts; | |
1081 | |
1082 if (xlcf->sheets.elts == NULL) { | |
1083 if (ngx_array_init(&xlcf->sheets, cf->pool, 1, | |
1084 sizeof(ngx_http_xslt_sheet_t)) | |
1085 != NGX_OK) | |
1086 { | |
1087 return NGX_CONF_ERROR; | |
1088 } | |
1089 } | |
1090 | |
1091 sheet = ngx_array_push(&xlcf->sheets); | |
1092 if (sheet == NULL) { | |
1093 return NGX_CONF_ERROR; | |
1094 } | |
1095 | |
1096 ngx_memzero(sheet, sizeof(ngx_http_xslt_sheet_t)); | |
1097 | |
1098 if (ngx_conf_full_name(cf->cycle, &value[1], 0) != NGX_OK) { | |
1099 return NGX_CONF_ERROR; | |
1100 } | |
1101 | |
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1102 xmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_xslt_filter_module); |
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1103 |
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1104 file = xmcf->sheet_files.elts; |
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1105 for (i = 0; i < xmcf->sheet_files.nelts; i++) { |
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1106 if (ngx_strcmp(file[i].name, &value[1].data) == 0) { |
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1107 sheet->stylesheet = file[i].data; |
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1108 goto found; |
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1109 } |
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1110 } |
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1111 |
2139 | 1112 cln = ngx_pool_cleanup_add(cf->pool, 0); |
1113 if (cln == NULL) { | |
1114 return NGX_CONF_ERROR; | |
1115 } | |
1116 | |
1117 sheet->stylesheet = xsltParseStylesheetFile(value[1].data); | |
1118 if (sheet->stylesheet == NULL) { | |
1119 ngx_conf_log_error(NGX_LOG_ERR, cf, 0, | |
1120 "xsltParseStylesheetFile(\"%s\") failed", | |
1121 value[1].data); | |
1122 return NGX_CONF_ERROR; | |
1123 } | |
1124 | |
1125 cln->handler = ngx_http_xslt_cleanup_stylesheet; | |
1126 cln->data = sheet->stylesheet; | |
1127 | |
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1128 file = ngx_array_push(&xmcf->sheet_files); |
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1129 if (file == NULL) { |
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1130 return NGX_CONF_ERROR; |
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1131 } |
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1132 |
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1133 file->name = value[1].data; |
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1134 file->data = sheet->stylesheet; |
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1135 |
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1136 found: |
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1137 |
2139 | 1138 n = cf->args->nelts; |
1139 | |
1140 if (n == 2) { | |
1141 return NGX_CONF_OK; | |
1142 } | |
1143 | |
1144 if (ngx_array_init(&sheet->params, cf->pool, n - 2, | |
1145 sizeof(ngx_http_xslt_param_t)) | |
1146 != NGX_OK) | |
1147 { | |
1148 return NGX_CONF_ERROR; | |
1149 } | |
1150 | |
1151 for (i = 2; i < n; i++) { | |
1152 | |
1153 param = ngx_array_push(&sheet->params); | |
1154 if (param == NULL) { | |
1155 return NGX_CONF_ERROR; | |
1156 } | |
1157 | |
1158 param->lengths = NULL; | |
1159 param->values = NULL; | |
1160 | |
1161 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); | |
1162 | |
1163 sc.cf = cf; | |
1164 sc.source = &value[i]; | |
1165 sc.lengths = ¶m->lengths; | |
1166 sc.values = ¶m->values; | |
1167 sc.variables = ngx_http_script_variables_count(&value[i]); | |
1168 sc.complete_lengths = 1; | |
1169 sc.complete_values = 1; | |
1170 | |
1171 if (ngx_http_script_compile(&sc) != NGX_OK) { | |
1172 return NGX_CONF_ERROR; | |
1173 } | |
1174 } | |
1175 | |
1176 return NGX_CONF_OK; | |
1177 } | |
1178 | |
1179 | |
1180 static void | |
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1181 ngx_http_xslt_cleanup_dtd(void *data) |
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1182 { |
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1183 xmlFreeDtd(data); |
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1184 } |
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1185 |
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1186 |
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1187 static void |
2139 | 1188 ngx_http_xslt_cleanup_stylesheet(void *data) |
1189 { | |
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1190 xsltFreeStylesheet(data); |
2139 | 1191 } |
1192 | |
1193 | |
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1194 static void * |
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1195 ngx_http_xslt_filter_create_main_conf(ngx_conf_t *cf) |
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1196 { |
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1197 ngx_http_xslt_filter_main_conf_t *conf; |
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1198 |
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1199 conf = ngx_palloc(cf->pool, sizeof(ngx_http_xslt_filter_main_conf_t)); |
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1200 if (conf == NULL) { |
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1201 return NGX_CONF_ERROR; |
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1202 } |
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1203 |
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1204 if (ngx_array_init(&conf->dtd_files, cf->pool, 1, |
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1205 sizeof(ngx_http_xslt_file_t)) |
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1206 != NGX_OK) |
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1207 { |
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1208 return NULL; |
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1209 } |
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1210 |
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1211 if (ngx_array_init(&conf->sheet_files, cf->pool, 1, |
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1212 sizeof(ngx_http_xslt_file_t)) |
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1213 != NGX_OK) |
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1214 { |
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1215 return NULL; |
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1216 } |
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1217 |
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1218 return conf; |
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1219 } |
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1220 |
2139 | 1221 |
1222 static void * | |
1223 ngx_http_xslt_filter_create_conf(ngx_conf_t *cf) | |
1224 { | |
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1225 ngx_http_xslt_filter_loc_conf_t *conf; |
2139 | 1226 |
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1227 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_xslt_filter_loc_conf_t)); |
2139 | 1228 if (conf == NULL) { |
1229 return NGX_CONF_ERROR; | |
1230 } | |
1231 | |
1232 /* | |
1233 * set by ngx_pcalloc(): | |
1234 * | |
2148 | 1235 * conf->dtd = NULL; |
1236 * conf->sheets = { NULL }; | |
1237 * conf->types = { NULL }; | |
1238 * conf->types_keys = NULL; | |
2139 | 1239 */ |
1240 | |
1241 return conf; | |
1242 } | |
1243 | |
1244 | |
1245 static char * | |
1246 ngx_http_xslt_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
1247 { | |
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1248 ngx_http_xslt_filter_loc_conf_t *prev = parent; |
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1249 ngx_http_xslt_filter_loc_conf_t *conf = child; |
2139 | 1250 |
1251 if (conf->dtd == NULL) { | |
1252 conf->dtd = prev->dtd; | |
1253 } | |
1254 | |
1255 if (conf->sheets.nelts == 0) { | |
1256 conf->sheets = prev->sheets; | |
1257 } | |
1258 | |
2148 | 1259 if (ngx_http_merge_types(cf, conf->types_keys, &conf->types, |
1260 prev->types_keys, &prev->types, | |
1261 ngx_http_xslt_default_types) | |
2139 | 1262 != NGX_OK) |
1263 { | |
1264 return NGX_CONF_ERROR; | |
1265 } | |
1266 | |
1267 return NGX_CONF_OK; | |
1268 } | |
1269 | |
1270 | |
1271 static ngx_int_t | |
1272 ngx_http_xslt_filter_init(ngx_conf_t *cf) | |
1273 { | |
1274 xmlInitParser(); | |
1275 | |
2299 | 1276 #if (NGX_HAVE_EXSLT) |
1277 exsltRegisterAll(); | |
1278 #endif | |
1279 | |
2139 | 1280 ngx_http_next_header_filter = ngx_http_top_header_filter; |
1281 ngx_http_top_header_filter = ngx_http_xslt_header_filter; | |
1282 | |
1283 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
1284 ngx_http_top_body_filter = ngx_http_xslt_body_filter; | |
1285 | |
1286 return NGX_OK; | |
1287 } | |
1288 | |
1289 | |
1290 static void | |
1291 ngx_http_xslt_filter_exit(ngx_cycle_t *cycle) | |
1292 { | |
1293 xsltCleanupGlobals(); | |
1294 xmlCleanupParser(); | |
1295 } |