1270 lines
33 KiB
C
1270 lines
33 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_http.h>
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#include <libxml/parser.h>
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#include <libxml/tree.h>
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#include <libxslt/xslt.h>
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#include <libxslt/xsltInternals.h>
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#include <libxslt/transform.h>
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#include <libxslt/xsltutils.h>
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#if (NGX_HAVE_EXSLT)
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#include <libexslt/exslt.h>
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#endif
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#ifndef NGX_HTTP_XSLT_REUSE_DTD
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#define NGX_HTTP_XSLT_REUSE_DTD 1
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#endif
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typedef struct {
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u_char *name;
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void *data;
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} ngx_http_xslt_file_t;
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typedef struct {
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ngx_array_t dtd_files; /* ngx_http_xslt_file_t */
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ngx_array_t sheet_files; /* ngx_http_xslt_file_t */
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} ngx_http_xslt_filter_main_conf_t;
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typedef struct {
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xsltStylesheetPtr stylesheet;
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ngx_array_t params; /* ngx_http_complex_value_t */
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} ngx_http_xslt_sheet_t;
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typedef struct {
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xmlDtdPtr dtd;
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ngx_array_t sheets; /* ngx_http_xslt_sheet_t */
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ngx_hash_t types;
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ngx_array_t *types_keys;
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} ngx_http_xslt_filter_loc_conf_t;
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typedef struct {
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xmlDocPtr doc;
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xmlParserCtxtPtr ctxt;
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xmlSAXHandler *sax;
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ngx_http_request_t *request;
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ngx_array_t params;
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ngx_uint_t done; /* unsigned done:1; */
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} ngx_http_xslt_filter_ctx_t;
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static ngx_int_t ngx_http_xslt_send(ngx_http_request_t *r,
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ngx_http_xslt_filter_ctx_t *ctx, ngx_buf_t *b);
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static ngx_int_t ngx_http_xslt_add_chunk(ngx_http_request_t *r,
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ngx_http_xslt_filter_ctx_t *ctx, ngx_buf_t *b);
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static void ngx_http_xslt_sax_start_document(void *data);
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static void ngx_http_xslt_sax_end_document(void *data);
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static void ngx_http_xslt_sax_internal_subset(void *data, const xmlChar *name,
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const xmlChar *externalId, const xmlChar *systemId);
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static void ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name,
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const xmlChar *externalId, const xmlChar *systemId);
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static void ngx_http_xslt_sax_entity_decl(void *data, const xmlChar *name,
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int type, const xmlChar *publicId, const xmlChar *systemId,
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xmlChar *content);
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static void ngx_http_xslt_sax_attribute_decl(void *data, const xmlChar *elem,
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const xmlChar *fullname, int type, int def, const xmlChar *defaultValue,
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xmlEnumerationPtr tree);
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static void ngx_http_xslt_sax_element_decl(void *data, const xmlChar * name,
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int type, xmlElementContentPtr content);
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static void ngx_http_xslt_sax_notation_decl(void *data, const xmlChar *name,
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const xmlChar *publicId, const xmlChar *systemId);
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static void ngx_http_xslt_sax_unparsed_entity_decl(void *data,
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const xmlChar *name, const xmlChar *publicId, const xmlChar *systemId,
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const xmlChar *notationName);
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static void ngx_http_xslt_sax_start_element(void *data,
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const xmlChar *localname, const xmlChar *prefix, const xmlChar *URI,
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int nb_namespaces, const xmlChar **namespaces, int nb_attributes,
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int nb_defaulted, const xmlChar **attributes);
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static void ngx_http_xslt_sax_end_element(void *data,
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const xmlChar * localname ATTRIBUTE_UNUSED,
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const xmlChar * prefix ATTRIBUTE_UNUSED,
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const xmlChar * URI ATTRIBUTE_UNUSED);
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static void ngx_http_xslt_sax_characters(void *data, const xmlChar *p, int len);
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static void ngx_http_xslt_sax_cdata_block(void *data, const xmlChar *p,
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int len);
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static xmlEntityPtr ngx_http_xslt_sax_get_entity(void *data,
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const xmlChar *name);
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static xmlEntityPtr ngx_http_xslt_sax_get_parameter_entity(void *data,
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const xmlChar *name);
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static xmlParserInputPtr ngx_http_xslt_sax_resolve_entity(void *data,
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const xmlChar *publicId, const xmlChar *systemId);
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static void ngx_http_xslt_sax_reference(void *data, const xmlChar *name);
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static void ngx_http_xslt_sax_comment(void *data, const xmlChar *value);
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static void ngx_http_xslt_sax_processing_instruction(void *data,
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const xmlChar *target, const xmlChar *pidata);
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static int ngx_http_xslt_sax_is_standalone(void *data);
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static int ngx_http_xslt_sax_has_internal_subset(void *data);
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static int ngx_http_xslt_sax_has_external_subset(void *data);
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static void ngx_cdecl ngx_http_xslt_sax_error(void *data, const char *msg, ...);
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static ngx_buf_t *ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r,
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ngx_http_xslt_filter_ctx_t *ctx);
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static ngx_int_t ngx_http_xslt_params(ngx_http_request_t *r,
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ngx_http_xslt_filter_ctx_t *ctx, ngx_array_t *params);
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static u_char *ngx_http_xslt_content_type(xsltStylesheetPtr s);
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static u_char *ngx_http_xslt_encoding(xsltStylesheetPtr s);
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static void ngx_http_xslt_cleanup(void *data);
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static char *ngx_http_xslt_entities(ngx_conf_t *cf, ngx_command_t *cmd,
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void *conf);
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static char *ngx_http_xslt_stylesheet(ngx_conf_t *cf, ngx_command_t *cmd,
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void *conf);
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static void ngx_http_xslt_cleanup_dtd(void *data);
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static void ngx_http_xslt_cleanup_stylesheet(void *data);
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static void *ngx_http_xslt_filter_create_main_conf(ngx_conf_t *cf);
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static void *ngx_http_xslt_filter_create_conf(ngx_conf_t *cf);
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static char *ngx_http_xslt_filter_merge_conf(ngx_conf_t *cf, void *parent,
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void *child);
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static ngx_int_t ngx_http_xslt_filter_init(ngx_conf_t *cf);
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static void ngx_http_xslt_filter_exit(ngx_cycle_t *cycle);
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ngx_str_t ngx_http_xslt_default_types[] = {
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ngx_string("text/xml"),
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ngx_null_string
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};
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static ngx_command_t ngx_http_xslt_filter_commands[] = {
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{ ngx_string("xml_entities"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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ngx_http_xslt_entities,
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NGX_HTTP_LOC_CONF_OFFSET,
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0,
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NULL },
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{ ngx_string("xslt_stylesheet"),
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NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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ngx_http_xslt_stylesheet,
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NGX_HTTP_LOC_CONF_OFFSET,
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0,
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NULL },
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{ ngx_string("xslt_types"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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ngx_http_types_slot,
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NGX_HTTP_LOC_CONF_OFFSET,
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offsetof(ngx_http_xslt_filter_loc_conf_t, types_keys),
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&ngx_http_xslt_default_types[0] },
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ngx_null_command
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};
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static ngx_http_module_t ngx_http_xslt_filter_module_ctx = {
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NULL, /* preconfiguration */
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ngx_http_xslt_filter_init, /* postconfiguration */
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ngx_http_xslt_filter_create_main_conf, /* create main configuration */
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NULL, /* init main configuration */
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NULL, /* create server configuration */
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NULL, /* merge server configuration */
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ngx_http_xslt_filter_create_conf, /* create location configuration */
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ngx_http_xslt_filter_merge_conf /* merge location configuration */
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};
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ngx_module_t ngx_http_xslt_filter_module = {
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NGX_MODULE_V1,
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&ngx_http_xslt_filter_module_ctx, /* module context */
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ngx_http_xslt_filter_commands, /* module directives */
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NGX_HTTP_MODULE, /* module type */
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NULL, /* init master */
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NULL, /* init module */
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NULL, /* init process */
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NULL, /* init thread */
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NULL, /* exit thread */
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ngx_http_xslt_filter_exit, /* exit process */
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ngx_http_xslt_filter_exit, /* exit master */
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NGX_MODULE_V1_PADDING
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};
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static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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static ngx_int_t
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ngx_http_xslt_header_filter(ngx_http_request_t *r)
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{
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ngx_http_xslt_filter_ctx_t *ctx;
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ngx_http_xslt_filter_loc_conf_t *conf;
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"xslt filter header");
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if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) {
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return ngx_http_next_header_filter(r);
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}
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conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module);
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if (conf->sheets.nelts == 0
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|| ngx_http_test_content_type(r, &conf->types) == NULL)
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{
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return ngx_http_next_header_filter(r);
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}
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ctx = ngx_http_get_module_ctx(r, ngx_http_xslt_filter_module);
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if (ctx) {
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return ngx_http_next_header_filter(r);
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}
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ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_xslt_filter_ctx_t));
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if (ctx == NULL) {
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return NGX_ERROR;
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}
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ngx_http_set_ctx(r, ctx, ngx_http_xslt_filter_module);
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r->main_filter_need_in_memory = 1;
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return NGX_OK;
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}
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static ngx_int_t
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ngx_http_xslt_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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{
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int wellFormed;
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ngx_chain_t *cl;
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ngx_http_xslt_filter_ctx_t *ctx;
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"xslt filter body");
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if (in == NULL) {
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return ngx_http_next_body_filter(r, in);
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}
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ctx = ngx_http_get_module_ctx(r, ngx_http_xslt_filter_module);
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if (ctx == NULL || ctx->done) {
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return ngx_http_next_body_filter(r, in);
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}
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for (cl = in; cl; cl = cl->next) {
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if (ngx_http_xslt_add_chunk(r, ctx, cl->buf) != NGX_OK) {
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if (ctx->ctxt->myDoc){
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#if (NGX_HTTP_XSLT_REUSE_DTD)
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ctx->ctxt->myDoc->extSubset = NULL;
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#endif
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xmlFreeDoc(ctx->ctxt->myDoc);
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}
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xmlFreeParserCtxt(ctx->ctxt);
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return ngx_http_xslt_send(r, ctx, NULL);
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}
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if (cl->buf->last_buf || cl->buf->last_in_chain) {
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ctx->doc = ctx->ctxt->myDoc;
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#if (NGX_HTTP_XSLT_REUSE_DTD)
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ctx->doc->extSubset = NULL;
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#endif
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wellFormed = ctx->ctxt->wellFormed;
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xmlFreeParserCtxt(ctx->ctxt);
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if (wellFormed) {
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return ngx_http_xslt_send(r, ctx,
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ngx_http_xslt_apply_stylesheet(r, ctx));
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}
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xmlFreeDoc(ctx->doc);
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ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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"not well formed XML document");
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return ngx_http_xslt_send(r, ctx, NULL);
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}
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}
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return NGX_OK;
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}
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static ngx_int_t
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ngx_http_xslt_send(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx,
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ngx_buf_t *b)
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{
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ngx_int_t rc;
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ngx_chain_t out;
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ngx_pool_cleanup_t *cln;
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ctx->done = 1;
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if (b == NULL) {
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return ngx_http_filter_finalize_request(r, NULL,
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NGX_HTTP_INTERNAL_SERVER_ERROR);
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}
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cln = ngx_pool_cleanup_add(r->pool, 0);
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if (cln == NULL) {
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ngx_free(b->pos);
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return ngx_http_filter_finalize_request(r, NULL,
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NGX_HTTP_INTERNAL_SERVER_ERROR);
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}
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if (r == r->main) {
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r->headers_out.content_length_n = b->last - b->pos;
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if (r->headers_out.content_length) {
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r->headers_out.content_length->hash = 0;
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r->headers_out.content_length = NULL;
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}
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ngx_http_clear_last_modified(r);
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}
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rc = ngx_http_next_header_filter(r);
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if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
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ngx_free(b->pos);
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return rc;
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}
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cln->handler = ngx_http_xslt_cleanup;
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cln->data = b->pos;
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out.buf = b;
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out.next = NULL;
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return ngx_http_next_body_filter(r, &out);
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}
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static ngx_int_t
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ngx_http_xslt_add_chunk(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx,
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ngx_buf_t *b)
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{
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int err;
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xmlSAXHandler *sax;
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xmlParserCtxtPtr ctxt;
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if (ctx->ctxt == NULL) {
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ctxt = xmlCreatePushParserCtxt(NULL, NULL, NULL, 0, NULL);
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if (ctxt == NULL) {
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ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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"xmlCreatePushParserCtxt() failed");
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return NGX_ERROR;
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}
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ctx->sax = ngx_palloc(r->pool, sizeof(xmlSAXHandler));
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if (ctx->sax == NULL) {
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return NGX_ERROR;
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}
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sax = ctxt->sax;
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ngx_memcpy(ctx->sax, sax, sizeof(xmlSAXHandler));
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sax->startDocument = ngx_http_xslt_sax_start_document;
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sax->endDocument = ngx_http_xslt_sax_end_document;
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sax->internalSubset = ngx_http_xslt_sax_internal_subset;
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sax->externalSubset = ngx_http_xslt_sax_external_subset;
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sax->entityDecl = ngx_http_xslt_sax_entity_decl;
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sax->attributeDecl = ngx_http_xslt_sax_attribute_decl;
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sax->elementDecl = ngx_http_xslt_sax_element_decl;
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sax->notationDecl = ngx_http_xslt_sax_notation_decl;
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sax->unparsedEntityDecl = ngx_http_xslt_sax_unparsed_entity_decl;
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sax->setDocumentLocator = NULL;
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sax->startElementNs = ngx_http_xslt_sax_start_element;
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sax->endElementNs = ngx_http_xslt_sax_end_element;
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sax->characters = ngx_http_xslt_sax_characters;
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sax->ignorableWhitespace = ngx_http_xslt_sax_characters;
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sax->cdataBlock = ngx_http_xslt_sax_cdata_block;
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sax->getEntity = ngx_http_xslt_sax_get_entity;
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sax->resolveEntity = ngx_http_xslt_sax_resolve_entity;
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sax->getParameterEntity = ngx_http_xslt_sax_get_parameter_entity;
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sax->reference = ngx_http_xslt_sax_reference;
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sax->comment = ngx_http_xslt_sax_comment;
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sax->processingInstruction = ngx_http_xslt_sax_processing_instruction;
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sax->isStandalone = ngx_http_xslt_sax_is_standalone;
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sax->hasInternalSubset = ngx_http_xslt_sax_has_internal_subset;
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sax->hasExternalSubset = ngx_http_xslt_sax_has_external_subset;
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sax->warning = NULL;
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sax->error = ngx_http_xslt_sax_error;
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sax->fatalError = ngx_http_xslt_sax_error;
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ctxt->userData = ctx;
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ctxt->replaceEntities = 1;
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ctxt->loadsubset = 1;
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ctx->ctxt = ctxt;
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ctx->request = r;
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}
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err = xmlParseChunk(ctx->ctxt, (char *) b->pos, (int) (b->last - b->pos),
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(b->last_buf) || (b->last_in_chain));
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if (err == 0) {
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b->pos = b->last;
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return NGX_OK;
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}
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ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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"xmlParseChunk() failed, error:%d", err);
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return NGX_ERROR;
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}
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static void
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ngx_http_xslt_sax_start_document(void *data)
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{
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ngx_http_xslt_filter_ctx_t *ctx = data;
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ctx->sax->startDocument(ctx->ctxt);
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}
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static void
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ngx_http_xslt_sax_end_document(void *data)
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{
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ngx_http_xslt_filter_ctx_t *ctx = data;
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ctx->sax->endDocument(ctx->ctxt);
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}
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|
|
static void
|
|
ngx_http_xslt_sax_internal_subset(void *data, const xmlChar *name,
|
|
const xmlChar *externalId, const xmlChar *systemId)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
ctx->sax->internalSubset(ctx->ctxt, name, externalId, systemId);
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name,
|
|
const xmlChar *externalId, const xmlChar *systemId)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
xmlDocPtr doc;
|
|
xmlDtdPtr dtd;
|
|
ngx_http_request_t *r;
|
|
ngx_http_xslt_filter_loc_conf_t *conf;
|
|
|
|
r = ctx->request;
|
|
|
|
conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module);
|
|
|
|
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
"xslt filter extSubset: \"%s\" \"%s\" \"%s\"",
|
|
name ? name : (xmlChar *) "",
|
|
externalId ? externalId : (xmlChar *) "",
|
|
systemId ? systemId : (xmlChar *) "");
|
|
|
|
doc = ctx->ctxt->myDoc;
|
|
|
|
#if (NGX_HTTP_XSLT_REUSE_DTD)
|
|
|
|
dtd = conf->dtd;
|
|
|
|
#else
|
|
|
|
dtd = xmlCopyDtd(conf->dtd);
|
|
if (dtd == NULL) {
|
|
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
"xmlCopyDtd() failed");
|
|
return;
|
|
}
|
|
|
|
if (doc->children == NULL) {
|
|
xmlAddChild((xmlNodePtr) doc, (xmlNodePtr) dtd);
|
|
|
|
} else {
|
|
xmlAddPrevSibling(doc->children, (xmlNodePtr) dtd);
|
|
}
|
|
|
|
#endif
|
|
|
|
doc->extSubset = dtd;
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_sax_entity_decl(void *data, const xmlChar *name, int type,
|
|
const xmlChar *publicId, const xmlChar *systemId, xmlChar *content)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
ctx->sax->entityDecl(ctx->ctxt, name, type, publicId, systemId, content);
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_sax_attribute_decl(void *data, const xmlChar *elem,
|
|
const xmlChar *fullname, int type, int def, const xmlChar *defaultValue,
|
|
xmlEnumerationPtr tree)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
ctx->sax->attributeDecl(ctx->ctxt, elem, fullname, type, def, defaultValue,
|
|
tree);
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_sax_element_decl(void *data, const xmlChar * name, int type,
|
|
xmlElementContentPtr content)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
ctx->sax->elementDecl(ctx->ctxt, name, type, content);
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_sax_notation_decl(void *data, const xmlChar *name,
|
|
const xmlChar *publicId, const xmlChar *systemId)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
ctx->sax->notationDecl(ctx->ctxt, name, publicId, systemId);
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_sax_unparsed_entity_decl(void *data, const xmlChar *name,
|
|
const xmlChar *publicId, const xmlChar *systemId,
|
|
const xmlChar *notationName)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
ctx->sax->unparsedEntityDecl(ctx->ctxt, name, publicId, systemId,
|
|
notationName);
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_sax_start_element(void *data, const xmlChar *localname,
|
|
const xmlChar *prefix, const xmlChar *URI, int nb_namespaces,
|
|
const xmlChar **namespaces, int nb_attributes, int nb_defaulted,
|
|
const xmlChar **attributes)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
ctx->sax->startElementNs(ctx->ctxt, localname, prefix, URI, nb_namespaces,
|
|
namespaces, nb_attributes, nb_defaulted, attributes);
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_sax_end_element(void *data,
|
|
const xmlChar * localname ATTRIBUTE_UNUSED,
|
|
const xmlChar * prefix ATTRIBUTE_UNUSED,
|
|
const xmlChar * URI ATTRIBUTE_UNUSED)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
ctx->sax->endElementNs(ctx->ctxt, localname, prefix, URI);
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_sax_characters(void *data, const xmlChar *p, int len)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
ctx->sax->characters(ctx->ctxt, p, len);
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_sax_cdata_block(void *data, const xmlChar *p, int len)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
ctx->sax->cdataBlock(ctx->ctxt, p, len);
|
|
}
|
|
|
|
|
|
static xmlEntityPtr
|
|
ngx_http_xslt_sax_get_entity(void *data, const xmlChar *name)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
return ctx->sax->getEntity(ctx->ctxt, name);
|
|
}
|
|
|
|
|
|
static xmlEntityPtr
|
|
ngx_http_xslt_sax_get_parameter_entity(void *data, const xmlChar *name)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
return ctx->sax->getParameterEntity(ctx->ctxt, name);
|
|
}
|
|
|
|
|
|
static xmlParserInputPtr
|
|
ngx_http_xslt_sax_resolve_entity(void *data, const xmlChar *publicId,
|
|
const xmlChar *systemId)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
return ctx->sax->resolveEntity(ctx->ctxt, publicId, systemId);
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_sax_reference(void *data, const xmlChar *name)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
ctx->sax->reference(ctx->ctxt, name);
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_sax_comment(void *data, const xmlChar *value)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
ctx->sax->comment(ctx->ctxt, value);
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_sax_processing_instruction(void *data, const xmlChar *target,
|
|
const xmlChar *pidata)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
ctx->sax->processingInstruction(ctx->ctxt, target, pidata);
|
|
}
|
|
|
|
|
|
static int
|
|
ngx_http_xslt_sax_is_standalone(void *data)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
return ctx->sax->isStandalone(ctx->ctxt);
|
|
}
|
|
|
|
|
|
static int
|
|
ngx_http_xslt_sax_has_internal_subset(void *data)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
return ctx->sax->hasInternalSubset(ctx->ctxt);
|
|
}
|
|
|
|
|
|
static int
|
|
ngx_http_xslt_sax_has_external_subset(void *data)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
return ctx->sax->hasExternalSubset(ctx->ctxt);
|
|
}
|
|
|
|
|
|
static void ngx_cdecl
|
|
ngx_http_xslt_sax_error(void *data, const char *msg, ...)
|
|
{
|
|
ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
|
size_t n;
|
|
va_list args;
|
|
u_char buf[NGX_MAX_ERROR_STR];
|
|
|
|
buf[0] = '\0';
|
|
|
|
va_start(args, msg);
|
|
n = (size_t) vsnprintf((char *) buf, NGX_MAX_ERROR_STR, msg, args);
|
|
va_end(args);
|
|
|
|
while (--n && (buf[n] == CR || buf[n] == LF)) { /* void */ }
|
|
|
|
ngx_log_error(NGX_LOG_ERR, ctx->request->connection->log, 0,
|
|
"libxml2 error: \"%*s\"", n + 1, buf);
|
|
}
|
|
|
|
|
|
static ngx_buf_t *
|
|
ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r,
|
|
ngx_http_xslt_filter_ctx_t *ctx)
|
|
{
|
|
int len, rc, doc_type;
|
|
u_char *type, *encoding;
|
|
ngx_buf_t *b;
|
|
ngx_uint_t i;
|
|
xmlChar *buf;
|
|
xmlDocPtr doc, res;
|
|
ngx_http_xslt_sheet_t *sheet;
|
|
ngx_http_xslt_filter_loc_conf_t *conf;
|
|
|
|
conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module);
|
|
sheet = conf->sheets.elts;
|
|
doc = ctx->doc;
|
|
|
|
/* preallocate array for 4 params */
|
|
|
|
if (ngx_array_init(&ctx->params, r->pool, 4 * 2 + 1, sizeof(char *))
|
|
!= NGX_OK)
|
|
{
|
|
xmlFreeDoc(doc);
|
|
return NULL;
|
|
}
|
|
|
|
for (i = 0; i < conf->sheets.nelts; i++) {
|
|
|
|
if (ngx_http_xslt_params(r, ctx, &sheet[i].params) != NGX_OK) {
|
|
xmlFreeDoc(doc);
|
|
return NULL;
|
|
}
|
|
|
|
res = xsltApplyStylesheet(sheet[i].stylesheet, doc, ctx->params.elts);
|
|
|
|
xmlFreeDoc(doc);
|
|
|
|
if (res == NULL) {
|
|
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
"xsltApplyStylesheet() failed");
|
|
return NULL;
|
|
}
|
|
|
|
doc = res;
|
|
|
|
/* reset array elements */
|
|
ctx->params.nelts = 0;
|
|
}
|
|
|
|
/* there must be at least one stylesheet */
|
|
|
|
if (r == r->main) {
|
|
type = ngx_http_xslt_content_type(sheet[i - 1].stylesheet);
|
|
|
|
} else {
|
|
type = NULL;
|
|
}
|
|
|
|
encoding = ngx_http_xslt_encoding(sheet[i - 1].stylesheet);
|
|
doc_type = doc->type;
|
|
|
|
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
"xslt filter type: %d t:%s e:%s",
|
|
doc_type, type ? type : (u_char *) "(null)",
|
|
encoding ? encoding : (u_char *) "(null)");
|
|
|
|
rc = xsltSaveResultToString(&buf, &len, doc, sheet[i - 1].stylesheet);
|
|
|
|
xmlFreeDoc(doc);
|
|
|
|
if (rc != 0) {
|
|
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
"xsltSaveResultToString() failed");
|
|
return NULL;
|
|
}
|
|
|
|
if (len == 0) {
|
|
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
"xsltSaveResultToString() returned zero-length result");
|
|
return NULL;
|
|
}
|
|
|
|
b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
if (b == NULL) {
|
|
ngx_free(buf);
|
|
return NULL;
|
|
}
|
|
|
|
b->pos = buf;
|
|
b->last = buf + len;
|
|
b->memory = 1;
|
|
|
|
if (encoding) {
|
|
r->headers_out.charset.len = ngx_strlen(encoding);
|
|
r->headers_out.charset.data = encoding;
|
|
}
|
|
|
|
if (r != r->main) {
|
|
return b;
|
|
}
|
|
|
|
b->last_buf = 1;
|
|
|
|
if (type) {
|
|
len = ngx_strlen(type);
|
|
|
|
r->headers_out.content_type_len = len;
|
|
r->headers_out.content_type.len = len;
|
|
r->headers_out.content_type.data = type;
|
|
|
|
} else if (doc_type == XML_HTML_DOCUMENT_NODE) {
|
|
|
|
r->headers_out.content_type_len = sizeof("text/html") - 1;
|
|
r->headers_out.content_type.len = sizeof("text/html") - 1;
|
|
r->headers_out.content_type.data = (u_char *) "text/html";
|
|
}
|
|
|
|
r->headers_out.content_type_lowcase = NULL;
|
|
|
|
return b;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_http_xslt_params(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx,
|
|
ngx_array_t *params)
|
|
{
|
|
u_char *p, *last, *value, *dst, *src, **s;
|
|
size_t len;
|
|
ngx_uint_t i;
|
|
ngx_str_t string;
|
|
ngx_http_complex_value_t *param;
|
|
|
|
param = params->elts;
|
|
|
|
for (i = 0; i < params->nelts; i++) {
|
|
|
|
if (ngx_http_complex_value(r, ¶m[i], &string) != NGX_OK) {
|
|
return NGX_ERROR;
|
|
}
|
|
|
|
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
"xslt filter param: \"%s\"", string.data);
|
|
|
|
p = string.data;
|
|
last = string.data + string.len - 1;
|
|
|
|
while (p && *p) {
|
|
|
|
value = p;
|
|
p = (u_char *) ngx_strchr(p, '=');
|
|
if (p == NULL) {
|
|
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
"invalid libxslt parameter \"%s\"", value);
|
|
return NGX_ERROR;
|
|
}
|
|
*p++ = '\0';
|
|
|
|
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
"xslt filter param name: \"%s\"", value);
|
|
|
|
s = ngx_array_push(&ctx->params);
|
|
if (s == NULL) {
|
|
return NGX_ERROR;
|
|
}
|
|
|
|
*s = value;
|
|
|
|
value = p;
|
|
p = (u_char *) ngx_strchr(p, ':');
|
|
|
|
if (p) {
|
|
len = p - value;
|
|
*p++ = '\0';
|
|
|
|
} else {
|
|
len = last - value;
|
|
}
|
|
|
|
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
"xslt filter param value: \"%s\"", value);
|
|
|
|
dst = value;
|
|
src = value;
|
|
|
|
ngx_unescape_uri(&dst, &src, len, 0);
|
|
|
|
*dst = '\0';
|
|
|
|
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
"xslt filter param unescaped: \"%s\"", value);
|
|
|
|
s = ngx_array_push(&ctx->params);
|
|
if (s == NULL) {
|
|
return NGX_ERROR;
|
|
}
|
|
|
|
*s = value;
|
|
}
|
|
}
|
|
|
|
s = ngx_array_push(&ctx->params);
|
|
if (s == NULL) {
|
|
return NGX_ERROR;
|
|
}
|
|
|
|
*s = NULL;
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static u_char *
|
|
ngx_http_xslt_content_type(xsltStylesheetPtr s)
|
|
{
|
|
u_char *type;
|
|
|
|
if (s->mediaType) {
|
|
return s->mediaType;
|
|
}
|
|
|
|
for (s = s->imports; s; s = s->next) {
|
|
|
|
type = ngx_http_xslt_content_type(s);
|
|
|
|
if (type) {
|
|
return type;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static u_char *
|
|
ngx_http_xslt_encoding(xsltStylesheetPtr s)
|
|
{
|
|
u_char *encoding;
|
|
|
|
if (s->encoding) {
|
|
return s->encoding;
|
|
}
|
|
|
|
for (s = s->imports; s; s = s->next) {
|
|
|
|
encoding = ngx_http_xslt_encoding(s);
|
|
|
|
if (encoding) {
|
|
return encoding;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_cleanup(void *data)
|
|
{
|
|
ngx_free(data);
|
|
}
|
|
|
|
|
|
static char *
|
|
ngx_http_xslt_entities(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
{
|
|
ngx_http_xslt_filter_loc_conf_t *xlcf = conf;
|
|
|
|
ngx_str_t *value;
|
|
ngx_uint_t i;
|
|
ngx_pool_cleanup_t *cln;
|
|
ngx_http_xslt_file_t *file;
|
|
ngx_http_xslt_filter_main_conf_t *xmcf;
|
|
|
|
if (xlcf->dtd) {
|
|
return "is duplicate";
|
|
}
|
|
|
|
value = cf->args->elts;
|
|
|
|
xmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_xslt_filter_module);
|
|
|
|
file = xmcf->dtd_files.elts;
|
|
for (i = 0; i < xmcf->dtd_files.nelts; i++) {
|
|
if (ngx_strcmp(file[i].name, &value[1].data) == 0) {
|
|
xlcf->dtd = file[i].data;
|
|
return NGX_CONF_OK;
|
|
}
|
|
}
|
|
|
|
cln = ngx_pool_cleanup_add(cf->pool, 0);
|
|
if (cln == NULL) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
xlcf->dtd = xmlParseDTD(NULL, (xmlChar *) value[1].data);
|
|
|
|
if (xlcf->dtd == NULL) {
|
|
ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "xmlParseDTD() failed");
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
cln->handler = ngx_http_xslt_cleanup_dtd;
|
|
cln->data = xlcf->dtd;
|
|
|
|
file = ngx_array_push(&xmcf->dtd_files);
|
|
if (file == NULL) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
file->name = value[1].data;
|
|
file->data = xlcf->dtd;
|
|
|
|
return NGX_CONF_OK;
|
|
}
|
|
|
|
|
|
|
|
static char *
|
|
ngx_http_xslt_stylesheet(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
{
|
|
ngx_http_xslt_filter_loc_conf_t *xlcf = conf;
|
|
|
|
ngx_str_t *value;
|
|
ngx_uint_t i, n;
|
|
ngx_pool_cleanup_t *cln;
|
|
ngx_http_xslt_file_t *file;
|
|
ngx_http_xslt_sheet_t *sheet;
|
|
ngx_http_complex_value_t *param;
|
|
ngx_http_compile_complex_value_t ccv;
|
|
ngx_http_xslt_filter_main_conf_t *xmcf;
|
|
|
|
value = cf->args->elts;
|
|
|
|
if (xlcf->sheets.elts == NULL) {
|
|
if (ngx_array_init(&xlcf->sheets, cf->pool, 1,
|
|
sizeof(ngx_http_xslt_sheet_t))
|
|
!= NGX_OK)
|
|
{
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
}
|
|
|
|
sheet = ngx_array_push(&xlcf->sheets);
|
|
if (sheet == NULL) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
ngx_memzero(sheet, sizeof(ngx_http_xslt_sheet_t));
|
|
|
|
if (ngx_conf_full_name(cf->cycle, &value[1], 0) != NGX_OK) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
xmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_xslt_filter_module);
|
|
|
|
file = xmcf->sheet_files.elts;
|
|
for (i = 0; i < xmcf->sheet_files.nelts; i++) {
|
|
if (ngx_strcmp(file[i].name, &value[1].data) == 0) {
|
|
sheet->stylesheet = file[i].data;
|
|
goto found;
|
|
}
|
|
}
|
|
|
|
cln = ngx_pool_cleanup_add(cf->pool, 0);
|
|
if (cln == NULL) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
sheet->stylesheet = xsltParseStylesheetFile(value[1].data);
|
|
if (sheet->stylesheet == NULL) {
|
|
ngx_conf_log_error(NGX_LOG_ERR, cf, 0,
|
|
"xsltParseStylesheetFile(\"%s\") failed",
|
|
value[1].data);
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
cln->handler = ngx_http_xslt_cleanup_stylesheet;
|
|
cln->data = sheet->stylesheet;
|
|
|
|
file = ngx_array_push(&xmcf->sheet_files);
|
|
if (file == NULL) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
file->name = value[1].data;
|
|
file->data = sheet->stylesheet;
|
|
|
|
found:
|
|
|
|
n = cf->args->nelts;
|
|
|
|
if (n == 2) {
|
|
return NGX_CONF_OK;
|
|
}
|
|
|
|
if (ngx_array_init(&sheet->params, cf->pool, n - 2,
|
|
sizeof(ngx_http_complex_value_t))
|
|
!= NGX_OK)
|
|
{
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
for (i = 2; i < n; i++) {
|
|
|
|
param = ngx_array_push(&sheet->params);
|
|
if (param == NULL) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
|
ccv.cf = cf;
|
|
ccv.value = &value[i];
|
|
ccv.complex_value = param;
|
|
ccv.zero = 1;
|
|
|
|
if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
}
|
|
|
|
return NGX_CONF_OK;
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_cleanup_dtd(void *data)
|
|
{
|
|
xmlFreeDtd(data);
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_cleanup_stylesheet(void *data)
|
|
{
|
|
xsltFreeStylesheet(data);
|
|
}
|
|
|
|
|
|
static void *
|
|
ngx_http_xslt_filter_create_main_conf(ngx_conf_t *cf)
|
|
{
|
|
ngx_http_xslt_filter_main_conf_t *conf;
|
|
|
|
conf = ngx_palloc(cf->pool, sizeof(ngx_http_xslt_filter_main_conf_t));
|
|
if (conf == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
if (ngx_array_init(&conf->dtd_files, cf->pool, 1,
|
|
sizeof(ngx_http_xslt_file_t))
|
|
!= NGX_OK)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
if (ngx_array_init(&conf->sheet_files, cf->pool, 1,
|
|
sizeof(ngx_http_xslt_file_t))
|
|
!= NGX_OK)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
return conf;
|
|
}
|
|
|
|
|
|
static void *
|
|
ngx_http_xslt_filter_create_conf(ngx_conf_t *cf)
|
|
{
|
|
ngx_http_xslt_filter_loc_conf_t *conf;
|
|
|
|
conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_xslt_filter_loc_conf_t));
|
|
if (conf == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* set by ngx_pcalloc():
|
|
*
|
|
* conf->dtd = NULL;
|
|
* conf->sheets = { NULL };
|
|
* conf->types = { NULL };
|
|
* conf->types_keys = NULL;
|
|
*/
|
|
|
|
return conf;
|
|
}
|
|
|
|
|
|
static char *
|
|
ngx_http_xslt_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
{
|
|
ngx_http_xslt_filter_loc_conf_t *prev = parent;
|
|
ngx_http_xslt_filter_loc_conf_t *conf = child;
|
|
|
|
if (conf->dtd == NULL) {
|
|
conf->dtd = prev->dtd;
|
|
}
|
|
|
|
if (conf->sheets.nelts == 0) {
|
|
conf->sheets = prev->sheets;
|
|
}
|
|
|
|
if (ngx_http_merge_types(cf, conf->types_keys, &conf->types,
|
|
prev->types_keys, &prev->types,
|
|
ngx_http_xslt_default_types)
|
|
!= NGX_OK)
|
|
{
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
return NGX_CONF_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_http_xslt_filter_init(ngx_conf_t *cf)
|
|
{
|
|
xmlInitParser();
|
|
|
|
#if (NGX_HAVE_EXSLT)
|
|
exsltRegisterAll();
|
|
#endif
|
|
|
|
ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
ngx_http_top_header_filter = ngx_http_xslt_header_filter;
|
|
|
|
ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
ngx_http_top_body_filter = ngx_http_xslt_body_filter;
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static void
|
|
ngx_http_xslt_filter_exit(ngx_cycle_t *cycle)
|
|
{
|
|
xsltCleanupGlobals();
|
|
xmlCleanupParser();
|
|
}
|