Mercurial > hg > nginx
annotate src/http/modules/ngx_http_xslt_filter_module.c @ 4583:a1d5842064f7
Fixed buffer overflow when long URI is processed by "try_files" in
regex location with "alias" (fixes ticket #135).
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Thu, 12 Apr 2012 09:19:14 +0000 |
parents | 1a11e4a8877a |
children | 959371df1806 |
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> | |
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17 #include <libxslt/variables.h> |
2139 | 18 #include <libxslt/xsltutils.h> |
19 | |
2299 | 20 #if (NGX_HAVE_EXSLT) |
21 #include <libexslt/exslt.h> | |
22 #endif | |
23 | |
2139 | 24 |
25 #ifndef NGX_HTTP_XSLT_REUSE_DTD | |
26 #define NGX_HTTP_XSLT_REUSE_DTD 1 | |
27 #endif | |
28 | |
29 | |
30 typedef struct { | |
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31 u_char *name; |
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32 void *data; |
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33 } ngx_http_xslt_file_t; |
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34 |
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35 |
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36 typedef struct { |
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37 ngx_array_t dtd_files; /* ngx_http_xslt_file_t */ |
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38 ngx_array_t sheet_files; /* ngx_http_xslt_file_t */ |
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39 } ngx_http_xslt_filter_main_conf_t; |
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40 |
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41 |
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42 typedef struct { |
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43 u_char *name; |
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44 ngx_http_complex_value_t value; |
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45 ngx_uint_t quote; /* unsigned quote:1; */ |
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46 } ngx_http_xslt_param_t; |
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47 |
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48 |
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49 typedef struct { |
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50 xsltStylesheetPtr stylesheet; |
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51 ngx_array_t params; /* ngx_http_xslt_param_t */ |
2139 | 52 } ngx_http_xslt_sheet_t; |
53 | |
54 | |
55 typedef struct { | |
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56 xmlDtdPtr dtd; |
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57 ngx_array_t sheets; /* ngx_http_xslt_sheet_t */ |
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58 ngx_hash_t types; |
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59 ngx_array_t *types_keys; |
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60 ngx_array_t *params; /* ngx_http_xslt_param_t */ |
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61 } ngx_http_xslt_filter_loc_conf_t; |
2139 | 62 |
63 | |
64 typedef struct { | |
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65 xmlDocPtr doc; |
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66 xmlParserCtxtPtr ctxt; |
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67 xsltTransformContextPtr transform; |
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68 ngx_http_request_t *request; |
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69 ngx_array_t params; |
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70 |
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71 ngx_uint_t done; /* unsigned done:1; */ |
2139 | 72 } ngx_http_xslt_filter_ctx_t; |
73 | |
74 | |
75 static ngx_int_t ngx_http_xslt_send(ngx_http_request_t *r, | |
76 ngx_http_xslt_filter_ctx_t *ctx, ngx_buf_t *b); | |
77 static ngx_int_t ngx_http_xslt_add_chunk(ngx_http_request_t *r, | |
78 ngx_http_xslt_filter_ctx_t *ctx, ngx_buf_t *b); | |
79 | |
80 | |
81 static void ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name, | |
82 const xmlChar *externalId, const xmlChar *systemId); | |
83 static void ngx_cdecl ngx_http_xslt_sax_error(void *data, const char *msg, ...); | |
84 | |
85 | |
86 static ngx_buf_t *ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r, | |
87 ngx_http_xslt_filter_ctx_t *ctx); | |
88 static ngx_int_t ngx_http_xslt_params(ngx_http_request_t *r, | |
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89 ngx_http_xslt_filter_ctx_t *ctx, ngx_array_t *params, ngx_uint_t final); |
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90 static u_char *ngx_http_xslt_content_type(xsltStylesheetPtr s); |
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91 static u_char *ngx_http_xslt_encoding(xsltStylesheetPtr s); |
2139 | 92 static void ngx_http_xslt_cleanup(void *data); |
93 | |
94 static char *ngx_http_xslt_entities(ngx_conf_t *cf, ngx_command_t *cmd, | |
95 void *conf); | |
96 static char *ngx_http_xslt_stylesheet(ngx_conf_t *cf, ngx_command_t *cmd, | |
97 void *conf); | |
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98 static char *ngx_http_xslt_param(ngx_conf_t *cf, ngx_command_t *cmd, |
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99 void *conf); |
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100 static void ngx_http_xslt_cleanup_dtd(void *data); |
2139 | 101 static void ngx_http_xslt_cleanup_stylesheet(void *data); |
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102 static void *ngx_http_xslt_filter_create_main_conf(ngx_conf_t *cf); |
2139 | 103 static void *ngx_http_xslt_filter_create_conf(ngx_conf_t *cf); |
104 static char *ngx_http_xslt_filter_merge_conf(ngx_conf_t *cf, void *parent, | |
105 void *child); | |
106 static ngx_int_t ngx_http_xslt_filter_init(ngx_conf_t *cf); | |
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107 static void ngx_http_xslt_filter_exit(ngx_cycle_t *cycle); |
2139 | 108 |
109 | |
110 ngx_str_t ngx_http_xslt_default_types[] = { | |
111 ngx_string("text/xml"), | |
112 ngx_null_string | |
113 }; | |
114 | |
115 | |
116 static ngx_command_t ngx_http_xslt_filter_commands[] = { | |
117 | |
118 { ngx_string("xml_entities"), | |
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119 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
2139 | 120 ngx_http_xslt_entities, |
121 NGX_HTTP_LOC_CONF_OFFSET, | |
122 0, | |
123 NULL }, | |
124 | |
125 { ngx_string("xslt_stylesheet"), | |
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126 NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, |
2139 | 127 ngx_http_xslt_stylesheet, |
128 NGX_HTTP_LOC_CONF_OFFSET, | |
129 0, | |
130 NULL }, | |
131 | |
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132 { ngx_string("xslt_param"), |
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133 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, |
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134 ngx_http_xslt_param, |
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135 NGX_HTTP_LOC_CONF_OFFSET, |
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136 0, |
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137 NULL }, |
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138 |
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139 { ngx_string("xslt_string_param"), |
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140 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, |
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141 ngx_http_xslt_param, |
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142 NGX_HTTP_LOC_CONF_OFFSET, |
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143 0, |
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144 (void *) 1 }, |
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145 |
2139 | 146 { ngx_string("xslt_types"), |
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147 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, |
2139 | 148 ngx_http_types_slot, |
149 NGX_HTTP_LOC_CONF_OFFSET, | |
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150 offsetof(ngx_http_xslt_filter_loc_conf_t, types_keys), |
2139 | 151 &ngx_http_xslt_default_types[0] }, |
152 | |
153 ngx_null_command | |
154 }; | |
155 | |
156 | |
157 static ngx_http_module_t ngx_http_xslt_filter_module_ctx = { | |
158 NULL, /* preconfiguration */ | |
159 ngx_http_xslt_filter_init, /* postconfiguration */ | |
160 | |
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161 ngx_http_xslt_filter_create_main_conf, /* create main configuration */ |
2139 | 162 NULL, /* init main configuration */ |
163 | |
164 NULL, /* create server configuration */ | |
165 NULL, /* merge server configuration */ | |
166 | |
167 ngx_http_xslt_filter_create_conf, /* create location configuration */ | |
168 ngx_http_xslt_filter_merge_conf /* merge location configuration */ | |
169 }; | |
170 | |
171 | |
172 ngx_module_t ngx_http_xslt_filter_module = { | |
173 NGX_MODULE_V1, | |
174 &ngx_http_xslt_filter_module_ctx, /* module context */ | |
175 ngx_http_xslt_filter_commands, /* module directives */ | |
176 NGX_HTTP_MODULE, /* module type */ | |
177 NULL, /* init master */ | |
178 NULL, /* init module */ | |
179 NULL, /* init process */ | |
180 NULL, /* init thread */ | |
181 NULL, /* exit thread */ | |
2983 | 182 ngx_http_xslt_filter_exit, /* exit process */ |
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183 ngx_http_xslt_filter_exit, /* exit master */ |
2139 | 184 NGX_MODULE_V1_PADDING |
185 }; | |
186 | |
187 | |
188 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
189 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
190 | |
191 | |
192 static ngx_int_t | |
193 ngx_http_xslt_header_filter(ngx_http_request_t *r) | |
194 { | |
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195 ngx_http_xslt_filter_ctx_t *ctx; |
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196 ngx_http_xslt_filter_loc_conf_t *conf; |
2139 | 197 |
198 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
199 "xslt filter header"); | |
200 | |
201 if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) { | |
202 return ngx_http_next_header_filter(r); | |
203 } | |
204 | |
205 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module); | |
206 | |
207 if (conf->sheets.nelts == 0 | |
2148 | 208 || ngx_http_test_content_type(r, &conf->types) == NULL) |
2139 | 209 { |
210 return ngx_http_next_header_filter(r); | |
211 } | |
212 | |
213 ctx = ngx_http_get_module_ctx(r, ngx_http_xslt_filter_module); | |
214 | |
215 if (ctx) { | |
216 return ngx_http_next_header_filter(r); | |
217 } | |
218 | |
219 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_xslt_filter_ctx_t)); | |
220 if (ctx == NULL) { | |
221 return NGX_ERROR; | |
222 } | |
223 | |
224 ngx_http_set_ctx(r, ctx, ngx_http_xslt_filter_module); | |
225 | |
226 r->main_filter_need_in_memory = 1; | |
227 | |
228 return NGX_OK; | |
229 } | |
230 | |
231 | |
232 static ngx_int_t | |
233 ngx_http_xslt_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
234 { | |
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235 int wellFormed; |
2139 | 236 ngx_chain_t *cl; |
237 ngx_http_xslt_filter_ctx_t *ctx; | |
238 | |
239 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
240 "xslt filter body"); | |
241 | |
242 if (in == NULL) { | |
243 return ngx_http_next_body_filter(r, in); | |
244 } | |
245 | |
246 ctx = ngx_http_get_module_ctx(r, ngx_http_xslt_filter_module); | |
247 | |
248 if (ctx == NULL || ctx->done) { | |
249 return ngx_http_next_body_filter(r, in); | |
250 } | |
251 | |
252 for (cl = in; cl; cl = cl->next) { | |
253 | |
254 if (ngx_http_xslt_add_chunk(r, ctx, cl->buf) != NGX_OK) { | |
255 | |
3642 | 256 if (ctx->ctxt->myDoc) { |
2139 | 257 |
258 #if (NGX_HTTP_XSLT_REUSE_DTD) | |
259 ctx->ctxt->myDoc->extSubset = NULL; | |
260 #endif | |
261 xmlFreeDoc(ctx->ctxt->myDoc); | |
262 } | |
263 | |
264 xmlFreeParserCtxt(ctx->ctxt); | |
265 | |
266 return ngx_http_xslt_send(r, ctx, NULL); | |
267 } | |
268 | |
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269 if (cl->buf->last_buf || cl->buf->last_in_chain) { |
2139 | 270 |
271 ctx->doc = ctx->ctxt->myDoc; | |
272 | |
273 #if (NGX_HTTP_XSLT_REUSE_DTD) | |
274 ctx->doc->extSubset = NULL; | |
275 #endif | |
276 | |
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277 wellFormed = ctx->ctxt->wellFormed; |
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278 |
2139 | 279 xmlFreeParserCtxt(ctx->ctxt); |
280 | |
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281 if (wellFormed) { |
2139 | 282 return ngx_http_xslt_send(r, ctx, |
283 ngx_http_xslt_apply_stylesheet(r, ctx)); | |
284 } | |
285 | |
286 xmlFreeDoc(ctx->doc); | |
287 | |
288 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
289 "not well formed XML document"); | |
290 | |
291 return ngx_http_xslt_send(r, ctx, NULL); | |
292 } | |
293 } | |
294 | |
295 return NGX_OK; | |
296 } | |
297 | |
298 | |
299 static ngx_int_t | |
300 ngx_http_xslt_send(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx, | |
301 ngx_buf_t *b) | |
302 { | |
303 ngx_int_t rc; | |
304 ngx_chain_t out; | |
305 ngx_pool_cleanup_t *cln; | |
306 | |
307 ctx->done = 1; | |
308 | |
309 if (b == NULL) { | |
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310 return ngx_http_filter_finalize_request(r, NULL, |
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311 NGX_HTTP_INTERNAL_SERVER_ERROR); |
2139 | 312 } |
313 | |
314 cln = ngx_pool_cleanup_add(r->pool, 0); | |
315 | |
316 if (cln == NULL) { | |
317 ngx_free(b->pos); | |
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318 return ngx_http_filter_finalize_request(r, NULL, |
2139 | 319 NGX_HTTP_INTERNAL_SERVER_ERROR); |
320 } | |
321 | |
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322 if (r == r->main) { |
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323 r->headers_out.content_length_n = b->last - b->pos; |
2139 | 324 |
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325 if (r->headers_out.content_length) { |
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326 r->headers_out.content_length->hash = 0; |
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327 r->headers_out.content_length = NULL; |
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328 } |
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329 |
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330 ngx_http_clear_last_modified(r); |
2139 | 331 } |
332 | |
333 rc = ngx_http_next_header_filter(r); | |
334 | |
335 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) { | |
336 ngx_free(b->pos); | |
337 return rc; | |
338 } | |
339 | |
340 cln->handler = ngx_http_xslt_cleanup; | |
341 cln->data = b->pos; | |
342 | |
343 out.buf = b; | |
344 out.next = NULL; | |
345 | |
346 return ngx_http_next_body_filter(r, &out); | |
347 } | |
348 | |
349 | |
350 static ngx_int_t | |
351 ngx_http_xslt_add_chunk(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx, | |
352 ngx_buf_t *b) | |
353 { | |
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354 int err; |
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355 xmlParserCtxtPtr ctxt; |
2139 | 356 |
357 if (ctx->ctxt == NULL) { | |
358 | |
359 ctxt = xmlCreatePushParserCtxt(NULL, NULL, NULL, 0, NULL); | |
360 if (ctxt == NULL) { | |
361 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
362 "xmlCreatePushParserCtxt() failed"); | |
363 return NGX_ERROR; | |
364 } | |
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365 xmlCtxtUseOptions(ctxt, XML_PARSE_NOENT|XML_PARSE_DTDLOAD |
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366 |XML_PARSE_NOWARNING); |
2139 | 367 |
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368 ctxt->sax->externalSubset = ngx_http_xslt_sax_external_subset; |
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369 ctxt->sax->setDocumentLocator = NULL; |
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370 ctxt->sax->error = ngx_http_xslt_sax_error; |
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371 ctxt->sax->fatalError = ngx_http_xslt_sax_error; |
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372 ctxt->sax->_private = ctx; |
2139 | 373 |
374 ctx->ctxt = ctxt; | |
375 ctx->request = r; | |
376 } | |
377 | |
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378 err = xmlParseChunk(ctx->ctxt, (char *) b->pos, (int) (b->last - b->pos), |
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379 (b->last_buf) || (b->last_in_chain)); |
2139 | 380 |
381 if (err == 0) { | |
382 b->pos = b->last; | |
383 return NGX_OK; | |
384 } | |
385 | |
386 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
387 "xmlParseChunk() failed, error:%d", err); | |
388 | |
389 return NGX_ERROR; | |
390 } | |
391 | |
392 | |
393 static void | |
394 ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name, | |
395 const xmlChar *externalId, const xmlChar *systemId) | |
396 { | |
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397 xmlParserCtxtPtr ctxt = data; |
2139 | 398 |
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399 xmlDocPtr doc; |
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400 xmlDtdPtr dtd; |
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401 ngx_http_request_t *r; |
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402 ngx_http_xslt_filter_ctx_t *ctx; |
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403 ngx_http_xslt_filter_loc_conf_t *conf; |
2139 | 404 |
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405 ctx = ctxt->sax->_private; |
2139 | 406 r = ctx->request; |
407 | |
408 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module); | |
409 | |
410 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
411 "xslt filter extSubset: \"%s\" \"%s\" \"%s\"", | |
412 name ? name : (xmlChar *) "", | |
413 externalId ? externalId : (xmlChar *) "", | |
414 systemId ? systemId : (xmlChar *) ""); | |
415 | |
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416 doc = ctxt->myDoc; |
2139 | 417 |
418 #if (NGX_HTTP_XSLT_REUSE_DTD) | |
419 | |
420 dtd = conf->dtd; | |
421 | |
422 #else | |
423 | |
424 dtd = xmlCopyDtd(conf->dtd); | |
425 if (dtd == NULL) { | |
426 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
427 "xmlCopyDtd() failed"); | |
428 return; | |
429 } | |
430 | |
431 if (doc->children == NULL) { | |
432 xmlAddChild((xmlNodePtr) doc, (xmlNodePtr) dtd); | |
433 | |
434 } else { | |
435 xmlAddPrevSibling(doc->children, (xmlNodePtr) dtd); | |
436 } | |
437 | |
438 #endif | |
439 | |
440 doc->extSubset = dtd; | |
441 } | |
442 | |
443 | |
444 static void ngx_cdecl | |
445 ngx_http_xslt_sax_error(void *data, const char *msg, ...) | |
446 { | |
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447 xmlParserCtxtPtr ctxt = data; |
2139 | 448 |
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449 size_t n; |
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450 va_list args; |
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451 ngx_http_xslt_filter_ctx_t *ctx; |
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452 u_char buf[NGX_MAX_ERROR_STR]; |
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453 |
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454 ctx = ctxt->sax->_private; |
2139 | 455 |
456 buf[0] = '\0'; | |
457 | |
458 va_start(args, msg); | |
459 n = (size_t) vsnprintf((char *) buf, NGX_MAX_ERROR_STR, msg, args); | |
460 va_end(args); | |
461 | |
462 while (--n && (buf[n] == CR || buf[n] == LF)) { /* void */ } | |
463 | |
464 ngx_log_error(NGX_LOG_ERR, ctx->request->connection->log, 0, | |
2999 | 465 "libxml2 error: \"%*s\"", n + 1, buf); |
2139 | 466 } |
467 | |
468 | |
469 static ngx_buf_t * | |
470 ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r, | |
471 ngx_http_xslt_filter_ctx_t *ctx) | |
472 { | |
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473 int len, rc, doc_type; |
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474 u_char *type, *encoding; |
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475 ngx_buf_t *b; |
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476 ngx_uint_t i; |
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477 xmlChar *buf; |
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478 xmlDocPtr doc, res; |
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479 ngx_http_xslt_sheet_t *sheet; |
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480 ngx_http_xslt_filter_loc_conf_t *conf; |
2139 | 481 |
482 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module); | |
483 sheet = conf->sheets.elts; | |
484 doc = ctx->doc; | |
485 | |
486 /* preallocate array for 4 params */ | |
487 | |
488 if (ngx_array_init(&ctx->params, r->pool, 4 * 2 + 1, sizeof(char *)) | |
489 != NGX_OK) | |
490 { | |
491 xmlFreeDoc(doc); | |
492 return NULL; | |
493 } | |
494 | |
495 for (i = 0; i < conf->sheets.nelts; i++) { | |
496 | |
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497 ctx->transform = xsltNewTransformContext(sheet[i].stylesheet, doc); |
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498 if (ctx->transform == NULL) { |
2139 | 499 xmlFreeDoc(doc); |
500 return NULL; | |
501 } | |
502 | |
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503 if (conf->params |
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504 && ngx_http_xslt_params(r, ctx, conf->params, 0) != NGX_OK) |
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505 { |
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506 xsltFreeTransformContext(ctx->transform); |
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507 xmlFreeDoc(doc); |
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508 return NULL; |
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509 } |
2139 | 510 |
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511 if (ngx_http_xslt_params(r, ctx, &sheet[i].params, 1) != NGX_OK) { |
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512 xsltFreeTransformContext(ctx->transform); |
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513 xmlFreeDoc(doc); |
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514 return NULL; |
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515 } |
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516 |
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517 res = xsltApplyStylesheetUser(sheet[i].stylesheet, doc, |
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518 ctx->params.elts, NULL, NULL, |
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519 ctx->transform); |
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520 |
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521 xsltFreeTransformContext(ctx->transform); |
2139 | 522 xmlFreeDoc(doc); |
523 | |
524 if (res == NULL) { | |
525 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
526 "xsltApplyStylesheet() failed"); | |
527 return NULL; | |
528 } | |
529 | |
530 doc = res; | |
531 | |
532 /* reset array elements */ | |
533 ctx->params.nelts = 0; | |
534 } | |
535 | |
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536 /* there must be at least one stylesheet */ |
2139 | 537 |
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538 if (r == r->main) { |
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539 type = ngx_http_xslt_content_type(sheet[i - 1].stylesheet); |
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540 |
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541 } else { |
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542 type = NULL; |
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543 } |
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544 |
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545 encoding = ngx_http_xslt_encoding(sheet[i - 1].stylesheet); |
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546 doc_type = doc->type; |
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547 |
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548 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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549 "xslt filter type: %d t:%s e:%s", |
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550 doc_type, type ? type : (u_char *) "(null)", |
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551 encoding ? encoding : (u_char *) "(null)"); |
2139 | 552 |
553 rc = xsltSaveResultToString(&buf, &len, doc, sheet[i - 1].stylesheet); | |
554 | |
555 xmlFreeDoc(doc); | |
556 | |
557 if (rc != 0) { | |
558 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
559 "xsltSaveResultToString() failed"); | |
560 return NULL; | |
561 } | |
562 | |
563 if (len == 0) { | |
564 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
565 "xsltSaveResultToString() returned zero-length result"); | |
566 return NULL; | |
567 } | |
568 | |
569 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); | |
570 if (b == NULL) { | |
571 ngx_free(buf); | |
572 return NULL; | |
573 } | |
574 | |
575 b->pos = buf; | |
576 b->last = buf + len; | |
577 b->memory = 1; | |
578 | |
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579 if (encoding) { |
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580 r->headers_out.charset.len = ngx_strlen(encoding); |
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581 r->headers_out.charset.data = encoding; |
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582 } |
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583 |
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584 if (r != r->main) { |
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585 return b; |
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586 } |
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587 |
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588 b->last_buf = 1; |
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589 |
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590 if (type) { |
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591 len = ngx_strlen(type); |
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592 |
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593 r->headers_out.content_type_len = len; |
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594 r->headers_out.content_type.len = len; |
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595 r->headers_out.content_type.data = type; |
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596 |
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597 } else if (doc_type == XML_HTML_DOCUMENT_NODE) { |
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598 |
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599 r->headers_out.content_type_len = sizeof("text/html") - 1; |
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600 ngx_str_set(&r->headers_out.content_type, "text/html"); |
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601 } |
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602 |
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603 r->headers_out.content_type_lowcase = NULL; |
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604 |
2139 | 605 return b; |
606 } | |
607 | |
608 | |
609 static ngx_int_t | |
610 ngx_http_xslt_params(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx, | |
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611 ngx_array_t *params, ngx_uint_t final) |
2139 | 612 { |
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613 u_char *p, *last, *value, *dst, *src, **s; |
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614 size_t len; |
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615 ngx_uint_t i; |
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616 ngx_str_t string; |
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617 ngx_http_xslt_param_t *param; |
2139 | 618 |
619 param = params->elts; | |
620 | |
621 for (i = 0; i < params->nelts; i++) { | |
622 | |
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623 if (ngx_http_complex_value(r, ¶m[i].value, &string) != NGX_OK) { |
2139 | 624 return NGX_ERROR; |
625 } | |
626 | |
627 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
628 "xslt filter param: \"%s\"", string.data); | |
629 | |
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630 if (param[i].name) { |
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631 |
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632 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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633 "xslt filter param name: \"%s\"", param[i].name); |
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634 |
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635 if (param[i].quote) { |
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636 if (xsltQuoteOneUserParam(ctx->transform, param[i].name, |
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637 string.data) |
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638 != 0) |
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639 { |
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640 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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641 "xsltQuoteOneUserParam(\"%s\", \"%s\") failed", |
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642 param[i].name, string.data); |
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643 return NGX_ERROR; |
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644 } |
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645 |
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646 continue; |
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647 } |
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648 |
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649 s = ngx_array_push(&ctx->params); |
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650 if (s == NULL) { |
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651 return NGX_ERROR; |
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652 } |
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653 |
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654 *s = param[i].name; |
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655 |
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656 s = ngx_array_push(&ctx->params); |
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657 if (s == NULL) { |
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658 return NGX_ERROR; |
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659 } |
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660 |
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661 *s = string.data; |
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662 |
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663 continue; |
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664 } |
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665 |
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666 /* |
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667 * parse param1=value1:param2=value2 syntax as used by parameters |
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668 * specified in xslt_stylesheet directives |
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669 */ |
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670 |
2139 | 671 p = string.data; |
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672 last = string.data + string.len; |
2139 | 673 |
674 while (p && *p) { | |
675 | |
676 value = p; | |
677 p = (u_char *) ngx_strchr(p, '='); | |
678 if (p == NULL) { | |
679 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
680 "invalid libxslt parameter \"%s\"", value); | |
681 return NGX_ERROR; | |
682 } | |
683 *p++ = '\0'; | |
684 | |
685 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
686 "xslt filter param name: \"%s\"", value); | |
687 | |
688 s = ngx_array_push(&ctx->params); | |
689 if (s == NULL) { | |
690 return NGX_ERROR; | |
691 } | |
692 | |
693 *s = value; | |
694 | |
695 value = p; | |
696 p = (u_char *) ngx_strchr(p, ':'); | |
697 | |
698 if (p) { | |
699 len = p - value; | |
700 *p++ = '\0'; | |
701 | |
702 } else { | |
703 len = last - value; | |
704 } | |
705 | |
706 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
707 "xslt filter param value: \"%s\"", value); | |
708 | |
709 dst = value; | |
710 src = value; | |
711 | |
712 ngx_unescape_uri(&dst, &src, len, 0); | |
713 | |
714 *dst = '\0'; | |
715 | |
716 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
717 "xslt filter param unescaped: \"%s\"", value); | |
718 | |
719 s = ngx_array_push(&ctx->params); | |
720 if (s == NULL) { | |
721 return NGX_ERROR; | |
722 } | |
723 | |
724 *s = value; | |
725 } | |
726 } | |
727 | |
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728 if (final) { |
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729 s = ngx_array_push(&ctx->params); |
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730 if (s == NULL) { |
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731 return NGX_ERROR; |
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732 } |
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733 |
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734 *s = NULL; |
2139 | 735 } |
736 | |
737 return NGX_OK; | |
738 } | |
739 | |
740 | |
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741 static u_char * |
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742 ngx_http_xslt_content_type(xsltStylesheetPtr s) |
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743 { |
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744 u_char *type; |
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745 |
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746 if (s->mediaType) { |
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747 return s->mediaType; |
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|
748 } |
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749 |
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750 for (s = s->imports; s; s = s->next) { |
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751 |
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752 type = ngx_http_xslt_content_type(s); |
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753 |
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754 if (type) { |
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755 return type; |
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756 } |
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757 } |
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758 |
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759 return NULL; |
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760 } |
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761 |
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762 |
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763 static u_char * |
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764 ngx_http_xslt_encoding(xsltStylesheetPtr s) |
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765 { |
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766 u_char *encoding; |
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767 |
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768 if (s->encoding) { |
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769 return s->encoding; |
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770 } |
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|
771 |
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772 for (s = s->imports; s; s = s->next) { |
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773 |
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774 encoding = ngx_http_xslt_encoding(s); |
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775 |
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776 if (encoding) { |
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777 return encoding; |
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778 } |
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779 } |
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780 |
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781 return NULL; |
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782 } |
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783 |
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784 |
2139 | 785 static void |
786 ngx_http_xslt_cleanup(void *data) | |
787 { | |
788 ngx_free(data); | |
789 } | |
790 | |
791 | |
792 static char * | |
793 ngx_http_xslt_entities(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
794 { | |
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795 ngx_http_xslt_filter_loc_conf_t *xlcf = conf; |
2139 | 796 |
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797 ngx_str_t *value; |
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798 ngx_uint_t i; |
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799 ngx_pool_cleanup_t *cln; |
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800 ngx_http_xslt_file_t *file; |
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801 ngx_http_xslt_filter_main_conf_t *xmcf; |
2139 | 802 |
803 if (xlcf->dtd) { | |
804 return "is duplicate"; | |
805 } | |
806 | |
807 value = cf->args->elts; | |
808 | |
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809 xmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_xslt_filter_module); |
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810 |
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811 file = xmcf->dtd_files.elts; |
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812 for (i = 0; i < xmcf->dtd_files.nelts; i++) { |
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813 if (ngx_strcmp(file[i].name, &value[1].data) == 0) { |
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814 xlcf->dtd = file[i].data; |
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815 return NGX_CONF_OK; |
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816 } |
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817 } |
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818 |
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819 cln = ngx_pool_cleanup_add(cf->pool, 0); |
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820 if (cln == NULL) { |
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821 return NGX_CONF_ERROR; |
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822 } |
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823 |
2139 | 824 xlcf->dtd = xmlParseDTD(NULL, (xmlChar *) value[1].data); |
825 | |
826 if (xlcf->dtd == NULL) { | |
827 ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "xmlParseDTD() failed"); | |
828 return NGX_CONF_ERROR; | |
829 } | |
830 | |
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831 cln->handler = ngx_http_xslt_cleanup_dtd; |
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832 cln->data = xlcf->dtd; |
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833 |
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834 file = ngx_array_push(&xmcf->dtd_files); |
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835 if (file == NULL) { |
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836 return NGX_CONF_ERROR; |
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837 } |
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838 |
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839 file->name = value[1].data; |
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840 file->data = xlcf->dtd; |
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841 |
2139 | 842 return NGX_CONF_OK; |
843 } | |
844 | |
845 | |
846 | |
847 static char * | |
848 ngx_http_xslt_stylesheet(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
849 { | |
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850 ngx_http_xslt_filter_loc_conf_t *xlcf = conf; |
2139 | 851 |
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852 ngx_str_t *value; |
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853 ngx_uint_t i, n; |
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854 ngx_pool_cleanup_t *cln; |
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855 ngx_http_xslt_file_t *file; |
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856 ngx_http_xslt_sheet_t *sheet; |
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|
857 ngx_http_xslt_param_t *param; |
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858 ngx_http_compile_complex_value_t ccv; |
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859 ngx_http_xslt_filter_main_conf_t *xmcf; |
2139 | 860 |
861 value = cf->args->elts; | |
862 | |
863 if (xlcf->sheets.elts == NULL) { | |
864 if (ngx_array_init(&xlcf->sheets, cf->pool, 1, | |
865 sizeof(ngx_http_xslt_sheet_t)) | |
866 != NGX_OK) | |
867 { | |
868 return NGX_CONF_ERROR; | |
869 } | |
870 } | |
871 | |
872 sheet = ngx_array_push(&xlcf->sheets); | |
873 if (sheet == NULL) { | |
874 return NGX_CONF_ERROR; | |
875 } | |
876 | |
877 ngx_memzero(sheet, sizeof(ngx_http_xslt_sheet_t)); | |
878 | |
879 if (ngx_conf_full_name(cf->cycle, &value[1], 0) != NGX_OK) { | |
880 return NGX_CONF_ERROR; | |
881 } | |
882 | |
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883 xmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_xslt_filter_module); |
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884 |
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885 file = xmcf->sheet_files.elts; |
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886 for (i = 0; i < xmcf->sheet_files.nelts; i++) { |
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887 if (ngx_strcmp(file[i].name, &value[1].data) == 0) { |
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888 sheet->stylesheet = file[i].data; |
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889 goto found; |
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890 } |
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891 } |
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892 |
2139 | 893 cln = ngx_pool_cleanup_add(cf->pool, 0); |
894 if (cln == NULL) { | |
895 return NGX_CONF_ERROR; | |
896 } | |
897 | |
898 sheet->stylesheet = xsltParseStylesheetFile(value[1].data); | |
899 if (sheet->stylesheet == NULL) { | |
900 ngx_conf_log_error(NGX_LOG_ERR, cf, 0, | |
901 "xsltParseStylesheetFile(\"%s\") failed", | |
902 value[1].data); | |
903 return NGX_CONF_ERROR; | |
904 } | |
905 | |
906 cln->handler = ngx_http_xslt_cleanup_stylesheet; | |
907 cln->data = sheet->stylesheet; | |
908 | |
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909 file = ngx_array_push(&xmcf->sheet_files); |
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910 if (file == NULL) { |
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911 return NGX_CONF_ERROR; |
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912 } |
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913 |
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914 file->name = value[1].data; |
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915 file->data = sheet->stylesheet; |
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916 |
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917 found: |
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918 |
2139 | 919 n = cf->args->nelts; |
920 | |
921 if (n == 2) { | |
922 return NGX_CONF_OK; | |
923 } | |
924 | |
925 if (ngx_array_init(&sheet->params, cf->pool, n - 2, | |
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|
926 sizeof(ngx_http_xslt_param_t)) |
2139 | 927 != NGX_OK) |
928 { | |
929 return NGX_CONF_ERROR; | |
930 } | |
931 | |
932 for (i = 2; i < n; i++) { | |
933 | |
934 param = ngx_array_push(&sheet->params); | |
935 if (param == NULL) { | |
936 return NGX_CONF_ERROR; | |
937 } | |
938 | |
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|
939 ngx_memzero(param, sizeof(ngx_http_xslt_param_t)); |
2588
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940 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
2139 | 941 |
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942 ccv.cf = cf; |
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943 ccv.value = &value[i]; |
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944 ccv.complex_value = ¶m->value; |
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945 ccv.zero = 1; |
2139 | 946 |
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947 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
2139 | 948 return NGX_CONF_ERROR; |
949 } | |
950 } | |
951 | |
952 return NGX_CONF_OK; | |
953 } | |
954 | |
955 | |
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956 static char * |
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957 ngx_http_xslt_param(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
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958 { |
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959 ngx_http_xslt_filter_loc_conf_t *xlcf = conf; |
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960 |
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961 ngx_http_xslt_param_t *param; |
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962 ngx_http_compile_complex_value_t ccv; |
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963 ngx_str_t *value; |
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964 |
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965 value = cf->args->elts; |
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966 |
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967 if (xlcf->params == NULL) { |
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968 xlcf->params = ngx_array_create(cf->pool, 2, |
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969 sizeof(ngx_http_xslt_param_t)); |
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970 if (xlcf->params == NULL) { |
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971 return NGX_CONF_ERROR; |
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972 } |
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973 } |
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974 |
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975 param = ngx_array_push(xlcf->params); |
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976 if (param == NULL) { |
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977 return NGX_CONF_ERROR; |
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978 } |
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979 |
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980 param->name = value[1].data; |
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981 param->quote = (cmd->post == NULL) ? 0 : 1; |
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982 |
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983 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
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984 |
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985 ccv.cf = cf; |
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986 ccv.value = &value[2]; |
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987 ccv.complex_value = ¶m->value; |
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988 ccv.zero = 1; |
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989 |
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990 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
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991 return NGX_CONF_ERROR; |
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992 } |
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993 |
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994 return NGX_CONF_OK; |
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995 } |
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996 |
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997 |
2139 | 998 static void |
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999 ngx_http_xslt_cleanup_dtd(void *data) |
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1000 { |
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1001 xmlFreeDtd(data); |
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1002 } |
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1003 |
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1004 |
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1005 static void |
2139 | 1006 ngx_http_xslt_cleanup_stylesheet(void *data) |
1007 { | |
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1008 xsltFreeStylesheet(data); |
2139 | 1009 } |
1010 | |
1011 | |
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1012 static void * |
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1013 ngx_http_xslt_filter_create_main_conf(ngx_conf_t *cf) |
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1014 { |
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1015 ngx_http_xslt_filter_main_conf_t *conf; |
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1016 |
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1017 conf = ngx_palloc(cf->pool, sizeof(ngx_http_xslt_filter_main_conf_t)); |
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1018 if (conf == NULL) { |
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1019 return NULL; |
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1020 } |
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1021 |
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1022 if (ngx_array_init(&conf->dtd_files, cf->pool, 1, |
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1023 sizeof(ngx_http_xslt_file_t)) |
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1024 != NGX_OK) |
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1025 { |
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1026 return NULL; |
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1027 } |
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1028 |
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1029 if (ngx_array_init(&conf->sheet_files, cf->pool, 1, |
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1030 sizeof(ngx_http_xslt_file_t)) |
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1031 != NGX_OK) |
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1032 { |
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1033 return NULL; |
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1034 } |
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1035 |
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1036 return conf; |
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1037 } |
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1038 |
2139 | 1039 |
1040 static void * | |
1041 ngx_http_xslt_filter_create_conf(ngx_conf_t *cf) | |
1042 { | |
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1043 ngx_http_xslt_filter_loc_conf_t *conf; |
2139 | 1044 |
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1045 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_xslt_filter_loc_conf_t)); |
2139 | 1046 if (conf == NULL) { |
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1047 return NULL; |
2139 | 1048 } |
1049 | |
1050 /* | |
1051 * set by ngx_pcalloc(): | |
1052 * | |
2148 | 1053 * conf->dtd = NULL; |
1054 * conf->sheets = { NULL }; | |
1055 * conf->types = { NULL }; | |
1056 * conf->types_keys = NULL; | |
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1057 * conf->params = NULL; |
2139 | 1058 */ |
1059 | |
1060 return conf; | |
1061 } | |
1062 | |
1063 | |
1064 static char * | |
1065 ngx_http_xslt_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
1066 { | |
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1067 ngx_http_xslt_filter_loc_conf_t *prev = parent; |
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1068 ngx_http_xslt_filter_loc_conf_t *conf = child; |
2139 | 1069 |
1070 if (conf->dtd == NULL) { | |
1071 conf->dtd = prev->dtd; | |
1072 } | |
1073 | |
1074 if (conf->sheets.nelts == 0) { | |
1075 conf->sheets = prev->sheets; | |
1076 } | |
1077 | |
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1078 if (conf->params == NULL) { |
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1079 conf->params = prev->params; |
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1080 } |
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1081 |
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1082 if (ngx_http_merge_types(cf, &conf->types_keys, &conf->types, |
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1083 &prev->types_keys, &prev->types, |
2148 | 1084 ngx_http_xslt_default_types) |
2139 | 1085 != NGX_OK) |
1086 { | |
1087 return NGX_CONF_ERROR; | |
1088 } | |
1089 | |
1090 return NGX_CONF_OK; | |
1091 } | |
1092 | |
1093 | |
1094 static ngx_int_t | |
1095 ngx_http_xslt_filter_init(ngx_conf_t *cf) | |
1096 { | |
1097 xmlInitParser(); | |
1098 | |
2299 | 1099 #if (NGX_HAVE_EXSLT) |
1100 exsltRegisterAll(); | |
1101 #endif | |
1102 | |
2139 | 1103 ngx_http_next_header_filter = ngx_http_top_header_filter; |
1104 ngx_http_top_header_filter = ngx_http_xslt_header_filter; | |
1105 | |
1106 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
1107 ngx_http_top_body_filter = ngx_http_xslt_body_filter; | |
1108 | |
1109 return NGX_OK; | |
1110 } | |
1111 | |
1112 | |
1113 static void | |
1114 ngx_http_xslt_filter_exit(ngx_cycle_t *cycle) | |
1115 { | |
1116 xsltCleanupGlobals(); | |
1117 xmlCleanupParser(); | |
1118 } |