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392
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10
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11 #include <libxml/parser.h>
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12 #include <libxml/tree.h>
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13 #include <libxslt/xslt.h>
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14 #include <libxslt/xsltInternals.h>
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15 #include <libxslt/transform.h>
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16 #include <libxslt/xsltutils.h>
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17
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18
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19 #ifndef NGX_HTTP_XSLT_REUSE_DTD
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20 #define NGX_HTTP_XSLT_REUSE_DTD 1
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21 #endif
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22
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23
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24 typedef struct {
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25 ngx_array_t *lengths;
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26 ngx_array_t *values;
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27 } ngx_http_xslt_param_t;
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28
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29
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30 typedef struct {
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31 xsltStylesheetPtr stylesheet;
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32 ngx_array_t params; /* ngx_http_xslt_param_t */
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33 } ngx_http_xslt_sheet_t;
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34
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35
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36 typedef struct {
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37 xmlDtdPtr dtd;
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38 ngx_array_t sheets; /* ngx_http_xslt_sheet_t */
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39 ngx_hash_t types_hash;
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40 ngx_array_t *keys;
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41 } ngx_http_xslt_filter_conf_t;
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42
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43
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44 typedef struct {
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45 xmlDocPtr doc;
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46 xmlParserCtxtPtr ctxt;
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47 xmlSAXHandler *sax;
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48 ngx_http_request_t *request;
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49 ngx_array_t params;
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50 unsigned done:1;
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51 unsigned html:1;
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52 } ngx_http_xslt_filter_ctx_t;
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53
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54
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55 static ngx_int_t ngx_http_xslt_send(ngx_http_request_t *r,
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56 ngx_http_xslt_filter_ctx_t *ctx, ngx_buf_t *b);
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57 static ngx_int_t ngx_http_xslt_filter_internal_error(ngx_http_request_t *r);
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58 static ngx_int_t ngx_http_xslt_add_chunk(ngx_http_request_t *r,
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59 ngx_http_xslt_filter_ctx_t *ctx, ngx_buf_t *b);
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60
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61
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62 static void ngx_http_xslt_sax_start_document(void *data);
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63 static void ngx_http_xslt_sax_end_document(void *data);
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64 static void ngx_http_xslt_sax_internal_subset(void *data, const xmlChar *name,
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65 const xmlChar *externalId, const xmlChar *systemId);
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66 static void ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name,
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67 const xmlChar *externalId, const xmlChar *systemId);
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68 static void ngx_http_xslt_sax_entity_decl(void *data, const xmlChar *name,
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69 int type, const xmlChar *publicId, const xmlChar *systemId,
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70 xmlChar *content);
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71 static void ngx_http_xslt_sax_attribute_decl(void *data, const xmlChar *elem,
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72 const xmlChar *fullname, int type, int def, const xmlChar *defaultValue,
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73 xmlEnumerationPtr tree);
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74 static void ngx_http_xslt_sax_element_decl(void *data, const xmlChar * name,
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75 int type, xmlElementContentPtr content);
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76 static void ngx_http_xslt_sax_notation_decl(void *data, const xmlChar *name,
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77 const xmlChar *publicId, const xmlChar *systemId);
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78 static void ngx_http_xslt_sax_unparsed_entity_decl(void *data,
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79 const xmlChar *name, const xmlChar *publicId, const xmlChar *systemId,
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80 const xmlChar *notationName);
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81 static void ngx_http_xslt_sax_start_element(void *data,
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82 const xmlChar *localname, const xmlChar *prefix, const xmlChar *URI,
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83 int nb_namespaces, const xmlChar **namespaces, int nb_attributes,
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84 int nb_defaulted, const xmlChar **attributes);
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85 static void ngx_http_xslt_sax_end_element(void *data,
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86 const xmlChar * localname ATTRIBUTE_UNUSED,
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87 const xmlChar * prefix ATTRIBUTE_UNUSED,
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88 const xmlChar * URI ATTRIBUTE_UNUSED);
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89 static void ngx_http_xslt_sax_characters(void *data, const xmlChar *p, int len);
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90 static void ngx_http_xslt_sax_cdata_block(void *data, const xmlChar *p,
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91 int len);
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92 static xmlEntityPtr ngx_http_xslt_sax_get_entity(void *data,
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93 const xmlChar *name);
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94 static xmlEntityPtr ngx_http_xslt_sax_get_parameter_entity(void *data,
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95 const xmlChar *name);
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96 static xmlParserInputPtr ngx_http_xslt_sax_resolve_entity(void *data,
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97 const xmlChar *publicId, const xmlChar *systemId);
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98 static void ngx_http_xslt_sax_reference(void *data, const xmlChar *name);
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99 static void ngx_http_xslt_sax_comment(void *data, const xmlChar *value);
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100 static void ngx_http_xslt_sax_processing_instruction(void *data,
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101 const xmlChar *target, const xmlChar *pidata);
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102 static int ngx_http_xslt_sax_is_standalone(void *data);
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103 static int ngx_http_xslt_sax_has_internal_subset(void *data);
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104 static int ngx_http_xslt_sax_has_external_subset(void *data);
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105 static void ngx_cdecl ngx_http_xslt_sax_error(void *data, const char *msg, ...);
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106
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107
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108 static ngx_buf_t *ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r,
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109 ngx_http_xslt_filter_ctx_t *ctx);
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110 static ngx_int_t ngx_http_xslt_params(ngx_http_request_t *r,
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111 ngx_http_xslt_filter_ctx_t *ctx, ngx_array_t *params);
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112 static void ngx_http_xslt_cleanup(void *data);
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113
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114 static char *ngx_http_xslt_entities(ngx_conf_t *cf, ngx_command_t *cmd,
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115 void *conf);
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116 static char *ngx_http_xslt_stylesheet(ngx_conf_t *cf, ngx_command_t *cmd,
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117 void *conf);
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118 static void ngx_http_xslt_cleanup_stylesheet(void *data);
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119 static void *ngx_http_xslt_filter_create_conf(ngx_conf_t *cf);
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120 static char *ngx_http_xslt_filter_merge_conf(ngx_conf_t *cf, void *parent,
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121 void *child);
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122 static ngx_int_t ngx_http_xslt_filter_init(ngx_conf_t *cf);
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123
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124
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125 ngx_str_t ngx_http_xslt_default_types[] = {
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126 ngx_string("text/xml"),
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127 ngx_null_string
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128 };
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129
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130
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131 static ngx_command_t ngx_http_xslt_filter_commands[] = {
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132
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133 { ngx_string("xml_entities"),
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134 NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_TAKE1,
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135 ngx_http_xslt_entities,
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136 NGX_HTTP_LOC_CONF_OFFSET,
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137 0,
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138 NULL },
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139
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140 { ngx_string("xslt_stylesheet"),
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141 NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_1MORE,
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142 ngx_http_xslt_stylesheet,
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143 NGX_HTTP_LOC_CONF_OFFSET,
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144 0,
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145 NULL },
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146
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147 { ngx_string("xslt_types"),
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148 NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_1MORE,
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149 ngx_http_types_slot,
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150 NGX_HTTP_LOC_CONF_OFFSET,
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151 offsetof(ngx_http_xslt_filter_conf_t, keys),
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152 &ngx_http_xslt_default_types[0] },
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153
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154 ngx_null_command
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155 };
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156
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157
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158 static ngx_http_module_t ngx_http_xslt_filter_module_ctx = {
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159 NULL, /* preconfiguration */
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160 ngx_http_xslt_filter_init, /* postconfiguration */
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161
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162 NULL, /* create main configuration */
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163 NULL, /* init main configuration */
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164
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165 NULL, /* create server configuration */
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166 NULL, /* merge server configuration */
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167
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168 ngx_http_xslt_filter_create_conf, /* create location configuration */
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169 ngx_http_xslt_filter_merge_conf /* merge location configuration */
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170 };
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171
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172
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173 ngx_module_t ngx_http_xslt_filter_module = {
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174 NGX_MODULE_V1,
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175 &ngx_http_xslt_filter_module_ctx, /* module context */
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176 ngx_http_xslt_filter_commands, /* module directives */
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177 NGX_HTTP_MODULE, /* module type */
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178 NULL, /* init master */
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179 NULL, /* init module */
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180 NULL, /* init process */
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181 NULL, /* init thread */
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182 NULL, /* exit thread */
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183 NULL, /* exit process */
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184 NULL, /* exit master */
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185 NGX_MODULE_V1_PADDING
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186 };
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187
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188
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189 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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190 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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191
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192
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193 static ngx_int_t
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194 ngx_http_xslt_header_filter(ngx_http_request_t *r)
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195 {
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196 ngx_http_xslt_filter_ctx_t *ctx;
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197 ngx_http_xslt_filter_conf_t *conf;
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198
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199 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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200 "xslt filter header");
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201
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202 if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) {
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203 return ngx_http_next_header_filter(r);
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204 }
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205
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206 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module);
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207
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208 if (conf->sheets.nelts == 0
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209 || ngx_http_test_content_type(r, &conf->types_hash) == NULL)
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210 {
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211 return ngx_http_next_header_filter(r);
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212 }
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213
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214 ctx = ngx_http_get_module_ctx(r, ngx_http_xslt_filter_module);
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215
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216 if (ctx) {
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217 return ngx_http_next_header_filter(r);
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218 }
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219
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220 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_xslt_filter_ctx_t));
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221 if (ctx == NULL) {
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222 return NGX_ERROR;
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223 }
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224
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225 ngx_http_set_ctx(r, ctx, ngx_http_xslt_filter_module);
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226
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227 r->main_filter_need_in_memory = 1;
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228
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229 return NGX_OK;
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230 }
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231
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232
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233 static ngx_int_t
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234 ngx_http_xslt_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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235 {
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236 ngx_chain_t *cl;
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237 ngx_http_xslt_filter_ctx_t *ctx;
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238
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239 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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240 "xslt filter body");
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241
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242 if (in == NULL) {
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243 return ngx_http_next_body_filter(r, in);
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244 }
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245
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246 ctx = ngx_http_get_module_ctx(r, ngx_http_xslt_filter_module);
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247
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248 if (ctx == NULL || ctx->done) {
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249 return ngx_http_next_body_filter(r, in);
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250 }
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251
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252 for (cl = in; cl; cl = cl->next) {
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253
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254 if (ngx_http_xslt_add_chunk(r, ctx, cl->buf) != NGX_OK) {
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255
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256 if (ctx->ctxt->myDoc){
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257
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258 #if (NGX_HTTP_XSLT_REUSE_DTD)
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259 ctx->ctxt->myDoc->extSubset = NULL;
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260 #endif
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261 xmlFreeDoc(ctx->ctxt->myDoc);
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262 }
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263
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264 xmlFreeParserCtxt(ctx->ctxt);
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265
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266 return ngx_http_xslt_send(r, ctx, NULL);
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267 }
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268
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269 if (cl->buf->last_buf) {
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270
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271 ctx->doc = ctx->ctxt->myDoc;
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272
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273 #if (NGX_HTTP_XSLT_REUSE_DTD)
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274 ctx->doc->extSubset = NULL;
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275 #endif
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276
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277 xmlFreeParserCtxt(ctx->ctxt);
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278
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279 if (ctx->ctxt->wellFormed) {
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280 return ngx_http_xslt_send(r, ctx,
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281 ngx_http_xslt_apply_stylesheet(r, ctx));
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282 }
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283
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284 xmlFreeDoc(ctx->doc);
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285
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286 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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287 "not well formed XML document");
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288
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289 return ngx_http_xslt_send(r, ctx, NULL);
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290 }
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291 }
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292
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293 return NGX_OK;
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294 }
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295
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296
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297 static ngx_int_t
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298 ngx_http_xslt_send(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx,
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299 ngx_buf_t *b)
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300 {
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301 ngx_int_t rc;
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302 ngx_chain_t out;
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303 ngx_pool_cleanup_t *cln;
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304
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305 ctx->done = 1;
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306
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307 if (b == NULL) {
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308 return ngx_http_xslt_filter_internal_error(r);
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309 }
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310
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311 cln = ngx_pool_cleanup_add(r->pool, 0);
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312
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313 if (cln == NULL) {
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314 ngx_free(b->pos);
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315 return ngx_http_special_response_handler(r,
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316 NGX_HTTP_INTERNAL_SERVER_ERROR);
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317 }
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318
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319 if (ctx->html) {
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320 r->headers_out.content_type_len = sizeof("text/html") - 1;
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321 r->headers_out.content_type.len = sizeof("text/html") - 1;
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322 r->headers_out.content_type.data = (u_char *) "text/html";
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323 }
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324
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325 r->headers_out.content_length_n = b->last - b->pos;
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326
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327 if (r->headers_out.content_length) {
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328 r->headers_out.content_length->hash = 0;
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329 r->headers_out.content_length = NULL;
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330 }
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331
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332 r->allow_ranges = 1;
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333
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334 rc = ngx_http_next_header_filter(r);
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335
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336 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
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337 ngx_free(b->pos);
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338 return rc;
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339 }
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340
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341 cln->handler = ngx_http_xslt_cleanup;
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342 cln->data = b->pos;
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343
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344 out.buf = b;
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345 out.next = NULL;
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346
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347 return ngx_http_next_body_filter(r, &out);
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348 }
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349
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350
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351 static ngx_int_t
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352 ngx_http_xslt_filter_internal_error(ngx_http_request_t *r)
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353 {
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354 ngx_int_t rc;
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355
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356 /* clear the modules contexts */
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357 ngx_memzero(r->ctx, sizeof(void *) * ngx_http_max_module);
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358
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359 rc = ngx_http_special_response_handler(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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360
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361 /* NGX_ERROR resets any pending data */
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362
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363 return (rc == NGX_OK) ? NGX_ERROR : rc;
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364 }
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365
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366
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367 static ngx_int_t
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368 ngx_http_xslt_add_chunk(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx,
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369 ngx_buf_t *b)
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370 {
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371 int err;
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372 xmlSAXHandler *sax;
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373 xmlParserCtxtPtr ctxt;
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374
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375 if (ctx->ctxt == NULL) {
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376
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377 ctxt = xmlCreatePushParserCtxt(NULL, NULL, NULL, 0, NULL);
|
|
|
378 if (ctxt == NULL) {
|
|
|
379 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
380 "xmlCreatePushParserCtxt() failed");
|
|
|
381 return NGX_ERROR;
|
|
|
382 }
|
|
|
383
|
|
|
384 ctx->sax = ngx_palloc(r->pool, sizeof(xmlSAXHandler));
|
|
|
385 if (ctx->sax == NULL) {
|
|
|
386 return NGX_ERROR;
|
|
|
387 }
|
|
|
388
|
|
|
389 sax = ctxt->sax;
|
|
|
390
|
|
|
391 ngx_memcpy(ctx->sax, sax, sizeof(xmlSAXHandler));
|
|
|
392
|
|
|
393 sax->startDocument = ngx_http_xslt_sax_start_document;
|
|
|
394 sax->endDocument = ngx_http_xslt_sax_end_document;
|
|
|
395
|
|
|
396 sax->internalSubset = ngx_http_xslt_sax_internal_subset;
|
|
|
397 sax->externalSubset = ngx_http_xslt_sax_external_subset;
|
|
|
398 sax->entityDecl = ngx_http_xslt_sax_entity_decl;
|
|
|
399 sax->attributeDecl = ngx_http_xslt_sax_attribute_decl;
|
|
|
400 sax->elementDecl = ngx_http_xslt_sax_element_decl;
|
|
|
401 sax->notationDecl = ngx_http_xslt_sax_notation_decl;
|
|
|
402 sax->unparsedEntityDecl = ngx_http_xslt_sax_unparsed_entity_decl;
|
|
|
403 sax->setDocumentLocator = NULL;
|
|
|
404
|
|
|
405 sax->startElementNs = ngx_http_xslt_sax_start_element;
|
|
|
406 sax->endElementNs = ngx_http_xslt_sax_end_element;
|
|
|
407
|
|
|
408 sax->characters = ngx_http_xslt_sax_characters;
|
|
|
409 sax->ignorableWhitespace = ngx_http_xslt_sax_characters;
|
|
|
410 sax->cdataBlock = ngx_http_xslt_sax_cdata_block;
|
|
|
411 sax->getEntity = ngx_http_xslt_sax_get_entity;
|
|
|
412 sax->resolveEntity = ngx_http_xslt_sax_resolve_entity;
|
|
|
413 sax->getParameterEntity = ngx_http_xslt_sax_get_parameter_entity;
|
|
|
414 sax->reference = ngx_http_xslt_sax_reference;
|
|
|
415 sax->comment = ngx_http_xslt_sax_comment;
|
|
|
416 sax->processingInstruction = ngx_http_xslt_sax_processing_instruction;
|
|
|
417
|
|
|
418 sax->isStandalone = ngx_http_xslt_sax_is_standalone;
|
|
|
419 sax->hasInternalSubset = ngx_http_xslt_sax_has_internal_subset;
|
|
|
420 sax->hasExternalSubset = ngx_http_xslt_sax_has_external_subset;
|
|
|
421
|
|
|
422 sax->warning = NULL;
|
|
|
423 sax->error = ngx_http_xslt_sax_error;
|
|
|
424 sax->fatalError = ngx_http_xslt_sax_error;
|
|
|
425
|
|
|
426 ctxt->userData = ctx;
|
|
|
427
|
|
|
428 ctxt->replaceEntities = 1;
|
|
|
429 ctxt->loadsubset = 1;
|
|
|
430
|
|
|
431 ctx->ctxt = ctxt;
|
|
|
432 ctx->request = r;
|
|
|
433 }
|
|
|
434
|
|
|
435 err = xmlParseChunk(ctx->ctxt, (char *) b->pos,
|
|
|
436 (int) (b->last - b->pos), b->last_buf);
|
|
|
437
|
|
|
438 if (err == 0) {
|
|
|
439 b->pos = b->last;
|
|
|
440 return NGX_OK;
|
|
|
441 }
|
|
|
442
|
|
|
443 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
444 "xmlParseChunk() failed, error:%d", err);
|
|
|
445
|
|
|
446 return NGX_ERROR;
|
|
|
447 }
|
|
|
448
|
|
|
449
|
|
|
450 static void
|
|
|
451 ngx_http_xslt_sax_start_document(void *data)
|
|
|
452 {
|
|
|
453 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
454
|
|
|
455 ctx->sax->startDocument(ctx->ctxt);
|
|
|
456 }
|
|
|
457
|
|
|
458
|
|
|
459 static void
|
|
|
460 ngx_http_xslt_sax_end_document(void *data)
|
|
|
461 {
|
|
|
462 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
463
|
|
|
464 ctx->sax->endDocument(ctx->ctxt);
|
|
|
465 }
|
|
|
466
|
|
|
467
|
|
|
468 static void
|
|
|
469 ngx_http_xslt_sax_internal_subset(void *data, const xmlChar *name,
|
|
|
470 const xmlChar *externalId, const xmlChar *systemId)
|
|
|
471 {
|
|
|
472 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
473
|
|
|
474 ctx->sax->internalSubset(ctx->ctxt, name, externalId, systemId);
|
|
|
475 }
|
|
|
476
|
|
|
477
|
|
|
478 static void
|
|
|
479 ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name,
|
|
|
480 const xmlChar *externalId, const xmlChar *systemId)
|
|
|
481 {
|
|
|
482 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
483
|
|
|
484 xmlDocPtr doc;
|
|
|
485 xmlDtdPtr dtd;
|
|
|
486 ngx_http_request_t *r;
|
|
|
487 ngx_http_xslt_filter_conf_t *conf;
|
|
|
488
|
|
|
489 r = ctx->request;
|
|
|
490
|
|
|
491 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module);
|
|
|
492
|
|
|
493 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
494 "xslt filter extSubset: \"%s\" \"%s\" \"%s\"",
|
|
|
495 name ? name : (xmlChar *) "",
|
|
|
496 externalId ? externalId : (xmlChar *) "",
|
|
|
497 systemId ? systemId : (xmlChar *) "");
|
|
|
498
|
|
|
499 doc = ctx->ctxt->myDoc;
|
|
|
500
|
|
|
501 #if (NGX_HTTP_XSLT_REUSE_DTD)
|
|
|
502
|
|
|
503 dtd = conf->dtd;
|
|
|
504
|
|
|
505 #else
|
|
|
506
|
|
|
507 dtd = xmlCopyDtd(conf->dtd);
|
|
|
508 if (dtd == NULL) {
|
|
|
509 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
510 "xmlCopyDtd() failed");
|
|
|
511 return;
|
|
|
512 }
|
|
|
513
|
|
|
514 dtd->name = xmlStrdup(name);
|
|
|
515
|
|
|
516 if (doc->children == NULL) {
|
|
|
517 xmlAddChild((xmlNodePtr) doc, (xmlNodePtr) dtd);
|
|
|
518
|
|
|
519 } else {
|
|
|
520 xmlAddPrevSibling(doc->children, (xmlNodePtr) dtd);
|
|
|
521 }
|
|
|
522
|
|
|
523 #endif
|
|
|
524
|
|
|
525 doc->extSubset = dtd;
|
|
|
526 }
|
|
|
527
|
|
|
528
|
|
|
529 static void
|
|
|
530 ngx_http_xslt_sax_entity_decl(void *data, const xmlChar *name, int type,
|
|
|
531 const xmlChar *publicId, const xmlChar *systemId, xmlChar *content)
|
|
|
532 {
|
|
|
533 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
534
|
|
|
535 ctx->sax->entityDecl(ctx->ctxt, name, type, publicId, systemId, content);
|
|
|
536 }
|
|
|
537
|
|
|
538
|
|
|
539 static void
|
|
|
540 ngx_http_xslt_sax_attribute_decl(void *data, const xmlChar *elem,
|
|
|
541 const xmlChar *fullname, int type, int def, const xmlChar *defaultValue,
|
|
|
542 xmlEnumerationPtr tree)
|
|
|
543 {
|
|
|
544 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
545
|
|
|
546 ctx->sax->attributeDecl(ctx->ctxt, elem, fullname, type, def, defaultValue,
|
|
|
547 tree);
|
|
|
548 }
|
|
|
549
|
|
|
550
|
|
|
551 static void
|
|
|
552 ngx_http_xslt_sax_element_decl(void *data, const xmlChar * name, int type,
|
|
|
553 xmlElementContentPtr content)
|
|
|
554 {
|
|
|
555 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
556
|
|
|
557 ctx->sax->elementDecl(ctx->ctxt, name, type, content);
|
|
|
558 }
|
|
|
559
|
|
|
560
|
|
|
561 static void
|
|
|
562 ngx_http_xslt_sax_notation_decl(void *data, const xmlChar *name,
|
|
|
563 const xmlChar *publicId, const xmlChar *systemId)
|
|
|
564 {
|
|
|
565 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
566
|
|
|
567 ctx->sax->notationDecl(ctx->ctxt, name, publicId, systemId);
|
|
|
568 }
|
|
|
569
|
|
|
570
|
|
|
571 static void
|
|
|
572 ngx_http_xslt_sax_unparsed_entity_decl(void *data, const xmlChar *name,
|
|
|
573 const xmlChar *publicId, const xmlChar *systemId,
|
|
|
574 const xmlChar *notationName)
|
|
|
575 {
|
|
|
576 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
577
|
|
|
578 ctx->sax->unparsedEntityDecl(ctx->ctxt, name, publicId, systemId,
|
|
|
579 notationName);
|
|
|
580 }
|
|
|
581
|
|
|
582
|
|
|
583 static void
|
|
|
584 ngx_http_xslt_sax_start_element(void *data, const xmlChar *localname,
|
|
|
585 const xmlChar *prefix, const xmlChar *URI, int nb_namespaces,
|
|
|
586 const xmlChar **namespaces, int nb_attributes, int nb_defaulted,
|
|
|
587 const xmlChar **attributes)
|
|
|
588 {
|
|
|
589 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
590
|
|
|
591 ctx->sax->startElementNs(ctx->ctxt, localname, prefix, URI, nb_namespaces,
|
|
|
592 namespaces, nb_attributes, nb_defaulted, attributes);
|
|
|
593 }
|
|
|
594
|
|
|
595
|
|
|
596 static void
|
|
|
597 ngx_http_xslt_sax_end_element(void *data,
|
|
|
598 const xmlChar * localname ATTRIBUTE_UNUSED,
|
|
|
599 const xmlChar * prefix ATTRIBUTE_UNUSED,
|
|
|
600 const xmlChar * URI ATTRIBUTE_UNUSED)
|
|
|
601 {
|
|
|
602 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
603
|
|
|
604 ctx->sax->endElementNs(ctx->ctxt, localname, prefix, URI);
|
|
|
605 }
|
|
|
606
|
|
|
607
|
|
|
608 static void
|
|
|
609 ngx_http_xslt_sax_characters(void *data, const xmlChar *p, int len)
|
|
|
610 {
|
|
|
611 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
612
|
|
|
613 ctx->sax->characters(ctx->ctxt, p, len);
|
|
|
614 }
|
|
|
615
|
|
|
616
|
|
|
617 static void
|
|
|
618 ngx_http_xslt_sax_cdata_block(void *data, const xmlChar *p, int len)
|
|
|
619 {
|
|
|
620 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
621
|
|
|
622 ctx->sax->cdataBlock(ctx->ctxt, p, len);
|
|
|
623 }
|
|
|
624
|
|
|
625
|
|
|
626 static xmlEntityPtr
|
|
|
627 ngx_http_xslt_sax_get_entity(void *data, const xmlChar *name)
|
|
|
628 {
|
|
|
629 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
630
|
|
|
631 return ctx->sax->getEntity(ctx->ctxt, name);
|
|
|
632 }
|
|
|
633
|
|
|
634
|
|
|
635 static xmlEntityPtr
|
|
|
636 ngx_http_xslt_sax_get_parameter_entity(void *data, const xmlChar *name)
|
|
|
637 {
|
|
|
638 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
639
|
|
|
640 return ctx->sax->getParameterEntity(ctx->ctxt, name);
|
|
|
641 }
|
|
|
642
|
|
|
643
|
|
|
644 static xmlParserInputPtr
|
|
|
645 ngx_http_xslt_sax_resolve_entity(void *data, const xmlChar *publicId,
|
|
|
646 const xmlChar *systemId)
|
|
|
647 {
|
|
|
648 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
649
|
|
|
650 return ctx->sax->resolveEntity(ctx->ctxt, publicId, systemId);
|
|
|
651 }
|
|
|
652
|
|
|
653
|
|
|
654 static void
|
|
|
655 ngx_http_xslt_sax_reference(void *data, const xmlChar *name)
|
|
|
656 {
|
|
|
657 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
658
|
|
|
659 ctx->sax->reference(ctx->ctxt, name);
|
|
|
660 }
|
|
|
661
|
|
|
662
|
|
|
663 static void
|
|
|
664 ngx_http_xslt_sax_comment(void *data, const xmlChar *value)
|
|
|
665 {
|
|
|
666 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
667
|
|
|
668 ctx->sax->comment(ctx->ctxt, value);
|
|
|
669 }
|
|
|
670
|
|
|
671
|
|
|
672 static void
|
|
|
673 ngx_http_xslt_sax_processing_instruction(void *data, const xmlChar *target,
|
|
|
674 const xmlChar *pidata)
|
|
|
675 {
|
|
|
676 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
677
|
|
|
678 ctx->sax->processingInstruction(ctx->ctxt, target, pidata);
|
|
|
679 }
|
|
|
680
|
|
|
681
|
|
|
682 static int
|
|
|
683 ngx_http_xslt_sax_is_standalone(void *data)
|
|
|
684 {
|
|
|
685 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
686
|
|
|
687 return ctx->sax->isStandalone(ctx->ctxt);
|
|
|
688 }
|
|
|
689
|
|
|
690
|
|
|
691 static int
|
|
|
692 ngx_http_xslt_sax_has_internal_subset(void *data)
|
|
|
693 {
|
|
|
694 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
695
|
|
|
696 return ctx->sax->hasInternalSubset(ctx->ctxt);
|
|
|
697 }
|
|
|
698
|
|
|
699
|
|
|
700 static int
|
|
|
701 ngx_http_xslt_sax_has_external_subset(void *data)
|
|
|
702 {
|
|
|
703 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
704
|
|
|
705 return ctx->sax->hasExternalSubset(ctx->ctxt);
|
|
|
706 }
|
|
|
707
|
|
|
708
|
|
|
709 static void ngx_cdecl
|
|
|
710 ngx_http_xslt_sax_error(void *data, const char *msg, ...)
|
|
|
711 {
|
|
|
712 ngx_http_xslt_filter_ctx_t *ctx = data;
|
|
|
713
|
|
|
714 size_t n;
|
|
|
715 va_list args;
|
|
|
716 u_char buf[NGX_MAX_ERROR_STR];
|
|
|
717
|
|
|
718 buf[0] = '\0';
|
|
|
719
|
|
|
720 va_start(args, msg);
|
|
|
721 n = (size_t) vsnprintf((char *) buf, NGX_MAX_ERROR_STR, msg, args);
|
|
|
722 va_end(args);
|
|
|
723
|
|
|
724 while (--n && (buf[n] == CR || buf[n] == LF)) { /* void */ }
|
|
|
725
|
|
|
726 ngx_log_error(NGX_LOG_ERR, ctx->request->connection->log, 0,
|
|
|
727 "libxml2 error: \"%*s\"", n, buf);
|
|
|
728 }
|
|
|
729
|
|
|
730
|
|
|
731 static ngx_buf_t *
|
|
|
732 ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r,
|
|
|
733 ngx_http_xslt_filter_ctx_t *ctx)
|
|
|
734 {
|
|
|
735 int len, rc;
|
|
|
736 ngx_buf_t *b;
|
|
|
737 ngx_uint_t i;
|
|
|
738 xmlChar *buf;
|
|
|
739 xmlDocPtr doc, res;
|
|
|
740 ngx_http_xslt_sheet_t *sheet;
|
|
|
741 ngx_http_xslt_filter_conf_t *conf;
|
|
|
742
|
|
|
743 conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module);
|
|
|
744 sheet = conf->sheets.elts;
|
|
|
745 doc = ctx->doc;
|
|
|
746
|
|
|
747 /* preallocate array for 4 params */
|
|
|
748
|
|
|
749 if (ngx_array_init(&ctx->params, r->pool, 4 * 2 + 1, sizeof(char *))
|
|
|
750 != NGX_OK)
|
|
|
751 {
|
|
|
752 xmlFreeDoc(doc);
|
|
|
753 return NULL;
|
|
|
754 }
|
|
|
755
|
|
|
756 for (i = 0; i < conf->sheets.nelts; i++) {
|
|
|
757
|
|
|
758 if (ngx_http_xslt_params(r, ctx, &sheet[i].params) != NGX_OK) {
|
|
|
759 xmlFreeDoc(doc);
|
|
|
760 return NULL;
|
|
|
761 }
|
|
|
762
|
|
|
763 res = xsltApplyStylesheet(sheet[i].stylesheet, doc, ctx->params.elts);
|
|
|
764
|
|
|
765 xmlFreeDoc(doc);
|
|
|
766
|
|
|
767 if (res == NULL) {
|
|
|
768 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
769 "xsltApplyStylesheet() failed");
|
|
|
770 return NULL;
|
|
|
771 }
|
|
|
772
|
|
|
773 doc = res;
|
|
|
774
|
|
|
775 /* reset array elements */
|
|
|
776 ctx->params.nelts = 0;
|
|
|
777 }
|
|
|
778
|
|
|
779 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
780 "xslt filter doc type: %d", doc->type);
|
|
|
781
|
|
|
782 ctx->html = (doc->type == XML_HTML_DOCUMENT_NODE) ? 1 : 0;
|
|
|
783
|
|
|
784 rc = xsltSaveResultToString(&buf, &len, doc, sheet[i - 1].stylesheet);
|
|
|
785
|
|
|
786 xmlFreeDoc(doc);
|
|
|
787
|
|
|
788 if (rc != 0) {
|
|
|
789 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
790 "xsltSaveResultToString() failed");
|
|
|
791 return NULL;
|
|
|
792 }
|
|
|
793
|
|
|
794 if (len == 0) {
|
|
|
795 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
796 "xsltSaveResultToString() returned zero-length result");
|
|
|
797 return NULL;
|
|
|
798 }
|
|
|
799
|
|
|
800 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
801 if (b == NULL) {
|
|
|
802 ngx_free(buf);
|
|
|
803 return NULL;
|
|
|
804 }
|
|
|
805
|
|
|
806 b->pos = buf;
|
|
|
807 b->last = buf + len;
|
|
|
808 b->memory = 1;
|
|
|
809 b->last_buf = 1;
|
|
|
810
|
|
|
811 return b;
|
|
|
812 }
|
|
|
813
|
|
|
814
|
|
|
815 static ngx_int_t
|
|
|
816 ngx_http_xslt_params(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx,
|
|
|
817 ngx_array_t *params)
|
|
|
818 {
|
|
|
819 u_char *p, *last, *value, *dst, *src, **s;
|
|
|
820 size_t len;
|
|
|
821 ngx_uint_t i;
|
|
|
822 ngx_str_t string;
|
|
|
823 ngx_http_xslt_param_t *param;
|
|
|
824
|
|
|
825 param = params->elts;
|
|
|
826
|
|
|
827 for (i = 0; i < params->nelts; i++) {
|
|
|
828
|
|
|
829 if (ngx_http_script_run(r, &string, param[i].lengths->elts, 1,
|
|
|
830 param[i].values->elts)
|
|
|
831 == NULL)
|
|
|
832 {
|
|
|
833 return NGX_ERROR;
|
|
|
834 }
|
|
|
835
|
|
|
836 last = string.data + string.len - 1;
|
|
|
837 *last = '\0';
|
|
|
838
|
|
|
839 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
840 "xslt filter param: \"%s\"", string.data);
|
|
|
841
|
|
|
842 p = string.data;
|
|
|
843
|
|
|
844 while (p && *p) {
|
|
|
845
|
|
|
846 value = p;
|
|
|
847 p = (u_char *) ngx_strchr(p, '=');
|
|
|
848 if (p == NULL) {
|
|
|
849 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
850 "invalid libxslt parameter \"%s\"", value);
|
|
|
851 return NGX_ERROR;
|
|
|
852 }
|
|
|
853 *p++ = '\0';
|
|
|
854
|
|
|
855 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
856 "xslt filter param name: \"%s\"", value);
|
|
|
857
|
|
|
858 s = ngx_array_push(&ctx->params);
|
|
|
859 if (s == NULL) {
|
|
|
860 return NGX_ERROR;
|
|
|
861 }
|
|
|
862
|
|
|
863 *s = value;
|
|
|
864
|
|
|
865 value = p;
|
|
|
866 p = (u_char *) ngx_strchr(p, ':');
|
|
|
867
|
|
|
868 if (p) {
|
|
|
869 len = p - value;
|
|
|
870 *p++ = '\0';
|
|
|
871
|
|
|
872 } else {
|
|
|
873 len = last - value;
|
|
|
874 }
|
|
|
875
|
|
|
876 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
877 "xslt filter param value: \"%s\"", value);
|
|
|
878
|
|
|
879 dst = value;
|
|
|
880 src = value;
|
|
|
881
|
|
|
882 ngx_unescape_uri(&dst, &src, len, 0);
|
|
|
883
|
|
|
884 *dst = '\0';
|
|
|
885
|
|
|
886 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
887 "xslt filter param unescaped: \"%s\"", value);
|
|
|
888
|
|
|
889 s = ngx_array_push(&ctx->params);
|
|
|
890 if (s == NULL) {
|
|
|
891 return NGX_ERROR;
|
|
|
892 }
|
|
|
893
|
|
|
894 *s = value;
|
|
|
895 }
|
|
|
896 }
|
|
|
897
|
|
|
898 s = ngx_array_push(&ctx->params);
|
|
|
899 if (s == NULL) {
|
|
|
900 return NGX_ERROR;
|
|
|
901 }
|
|
|
902
|
|
|
903 *s = NULL;
|
|
|
904
|
|
|
905 return NGX_OK;
|
|
|
906 }
|
|
|
907
|
|
|
908
|
|
|
909 static void
|
|
|
910 ngx_http_xslt_cleanup(void *data)
|
|
|
911 {
|
|
|
912 ngx_free(data);
|
|
|
913 }
|
|
|
914
|
|
|
915
|
|
|
916 static char *
|
|
|
917 ngx_http_xslt_entities(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
918 {
|
|
|
919 ngx_http_xslt_filter_conf_t *xlcf = conf;
|
|
|
920
|
|
|
921 ngx_str_t *value;
|
|
|
922
|
|
|
923 if (xlcf->dtd) {
|
|
|
924 return "is duplicate";
|
|
|
925 }
|
|
|
926
|
|
|
927 value = cf->args->elts;
|
|
|
928
|
|
|
929 xlcf->dtd = xmlParseDTD(NULL, (xmlChar *) value[1].data);
|
|
|
930
|
|
|
931 if (xlcf->dtd == NULL) {
|
|
|
932 ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "xmlParseDTD() failed");
|
|
|
933 return NGX_CONF_ERROR;
|
|
|
934 }
|
|
|
935
|
|
|
936 return NGX_CONF_OK;
|
|
|
937 }
|
|
|
938
|
|
|
939
|
|
|
940
|
|
|
941 static char *
|
|
|
942 ngx_http_xslt_stylesheet(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
943 {
|
|
|
944 ngx_http_xslt_filter_conf_t *xlcf = conf;
|
|
|
945
|
|
|
946 ngx_str_t *value;
|
|
|
947 ngx_uint_t i, n;
|
|
|
948 ngx_pool_cleanup_t *cln;
|
|
|
949 ngx_http_xslt_sheet_t *sheet;
|
|
|
950 ngx_http_xslt_param_t *param;
|
|
|
951 ngx_http_script_compile_t sc;
|
|
|
952
|
|
|
953 value = cf->args->elts;
|
|
|
954
|
|
|
955 if (xlcf->sheets.elts == NULL) {
|
|
|
956 if (ngx_array_init(&xlcf->sheets, cf->pool, 1,
|
|
|
957 sizeof(ngx_http_xslt_sheet_t))
|
|
|
958 != NGX_OK)
|
|
|
959 {
|
|
|
960 return NGX_CONF_ERROR;
|
|
|
961 }
|
|
|
962 }
|
|
|
963
|
|
|
964 sheet = ngx_array_push(&xlcf->sheets);
|
|
|
965 if (sheet == NULL) {
|
|
|
966 return NGX_CONF_ERROR;
|
|
|
967 }
|
|
|
968
|
|
|
969 ngx_memzero(sheet, sizeof(ngx_http_xslt_sheet_t));
|
|
|
970
|
|
|
971 if (ngx_conf_full_name(cf->cycle, &value[1], 0) != NGX_OK) {
|
|
|
972 return NGX_CONF_ERROR;
|
|
|
973 }
|
|
|
974
|
|
|
975 cln = ngx_pool_cleanup_add(cf->pool, 0);
|
|
|
976 if (cln == NULL) {
|
|
|
977 return NGX_CONF_ERROR;
|
|
|
978 }
|
|
|
979
|
|
|
980 sheet->stylesheet = xsltParseStylesheetFile(value[1].data);
|
|
|
981 if (sheet->stylesheet == NULL) {
|
|
|
982 ngx_conf_log_error(NGX_LOG_ERR, cf, 0,
|
|
|
983 "xsltParseStylesheetFile(\"%s\") failed",
|
|
|
984 value[1].data);
|
|
|
985 return NGX_CONF_ERROR;
|
|
|
986 }
|
|
|
987
|
|
|
988 cln->handler = ngx_http_xslt_cleanup_stylesheet;
|
|
|
989 cln->data = sheet->stylesheet;
|
|
|
990
|
|
|
991 n = cf->args->nelts;
|
|
|
992
|
|
|
993 if (n == 2) {
|
|
|
994 return NGX_CONF_OK;
|
|
|
995 }
|
|
|
996
|
|
|
997 if (ngx_array_init(&sheet->params, cf->pool, n - 2,
|
|
|
998 sizeof(ngx_http_xslt_param_t))
|
|
|
999 != NGX_OK)
|
|
|
1000 {
|
|
|
1001 return NGX_CONF_ERROR;
|
|
|
1002 }
|
|
|
1003
|
|
|
1004 for (i = 2; i < n; i++) {
|
|
|
1005
|
|
|
1006 param = ngx_array_push(&sheet->params);
|
|
|
1007 if (param == NULL) {
|
|
|
1008 return NGX_CONF_ERROR;
|
|
|
1009 }
|
|
|
1010
|
|
|
1011 param->lengths = NULL;
|
|
|
1012 param->values = NULL;
|
|
|
1013
|
|
|
1014 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
|
1015
|
|
|
1016 sc.cf = cf;
|
|
|
1017 sc.source = &value[i];
|
|
|
1018 sc.lengths = ¶m->lengths;
|
|
|
1019 sc.values = ¶m->values;
|
|
|
1020 sc.variables = ngx_http_script_variables_count(&value[i]);
|
|
|
1021 sc.complete_lengths = 1;
|
|
|
1022 sc.complete_values = 1;
|
|
|
1023
|
|
|
1024 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
1025 return NGX_CONF_ERROR;
|
|
|
1026 }
|
|
|
1027 }
|
|
|
1028
|
|
|
1029 return NGX_CONF_OK;
|
|
|
1030 }
|
|
|
1031
|
|
|
1032
|
|
|
1033 static void
|
|
|
1034 ngx_http_xslt_cleanup_stylesheet(void *data)
|
|
|
1035 {
|
|
|
1036 xsltStylesheetPtr stylesheet = data;
|
|
|
1037
|
|
|
1038 xsltFreeStylesheet(stylesheet);
|
|
|
1039 }
|
|
|
1040
|
|
|
1041
|
|
|
1042
|
|
|
1043 static void *
|
|
|
1044 ngx_http_xslt_filter_create_conf(ngx_conf_t *cf)
|
|
|
1045 {
|
|
|
1046 ngx_http_xslt_filter_conf_t *conf;
|
|
|
1047
|
|
|
1048 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_xslt_filter_conf_t));
|
|
|
1049 if (conf == NULL) {
|
|
|
1050 return NGX_CONF_ERROR;
|
|
|
1051 }
|
|
|
1052
|
|
|
1053 /*
|
|
|
1054 * set by ngx_pcalloc():
|
|
|
1055 *
|
|
|
1056 * conf->dtd
|
|
|
1057 * conf->sheets
|
|
|
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 {
|
|
|
1067 ngx_http_xslt_filter_conf_t *prev = parent;
|
|
|
1068 ngx_http_xslt_filter_conf_t *conf = child;
|
|
|
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
|
|
|
1078 if (ngx_http_merge_types(cf, conf->keys, &conf->types_hash, prev->keys,
|
|
|
1079 &prev->types_hash, ngx_http_xslt_default_types)
|
|
|
1080 != NGX_OK)
|
|
|
1081 {
|
|
|
1082 return NGX_CONF_ERROR;
|
|
|
1083 }
|
|
|
1084
|
|
|
1085 return NGX_CONF_OK;
|
|
|
1086 }
|
|
|
1087
|
|
|
1088
|
|
|
1089 static ngx_int_t
|
|
|
1090 ngx_http_xslt_filter_init(ngx_conf_t *cf)
|
|
|
1091 {
|
|
|
1092 xmlInitParser();
|
|
|
1093
|
|
|
1094 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
1095 ngx_http_top_header_filter = ngx_http_xslt_header_filter;
|
|
|
1096
|
|
|
1097 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
1098 ngx_http_top_body_filter = ngx_http_xslt_body_filter;
|
|
|
1099
|
|
|
1100 return NGX_OK;
|
|
|
1101 }
|
|
|
1102
|
|
|
1103
|
|
|
1104 static void
|
|
|
1105 ngx_http_xslt_filter_exit(ngx_cycle_t *cycle)
|
|
|
1106 {
|
|
|
1107 xsltCleanupGlobals();
|
|
|
1108 xmlCleanupParser();
|
|
|
1109 }
|
