diff options
Diffstat (limited to 'app/nginx/src/http/modules/ngx_http_xslt_filter_module.c')
| -rw-r--r-- | app/nginx/src/http/modules/ngx_http_xslt_filter_module.c | 1147 |
1 files changed, 1147 insertions, 0 deletions
diff --git a/app/nginx/src/http/modules/ngx_http_xslt_filter_module.c b/app/nginx/src/http/modules/ngx_http_xslt_filter_module.c new file mode 100644 index 0000000..695f3bf --- /dev/null +++ b/app/nginx/src/http/modules/ngx_http_xslt_filter_module.c @@ -0,0 +1,1147 @@ + +/* + * Copyright (C) Igor Sysoev + * Copyright (C) Nginx, Inc. + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_http.h> + +#include <libxml/parser.h> +#include <libxml/tree.h> +#include <libxslt/xslt.h> +#include <libxslt/xsltInternals.h> +#include <libxslt/transform.h> +#include <libxslt/variables.h> +#include <libxslt/xsltutils.h> + +#if (NGX_HAVE_EXSLT) +#include <libexslt/exslt.h> +#endif + + +#ifndef NGX_HTTP_XSLT_REUSE_DTD +#define NGX_HTTP_XSLT_REUSE_DTD 1 +#endif + + +typedef struct { + u_char *name; + void *data; +} ngx_http_xslt_file_t; + + +typedef struct { + ngx_array_t dtd_files; /* ngx_http_xslt_file_t */ + ngx_array_t sheet_files; /* ngx_http_xslt_file_t */ +} ngx_http_xslt_filter_main_conf_t; + + +typedef struct { + u_char *name; + ngx_http_complex_value_t value; + ngx_uint_t quote; /* unsigned quote:1; */ +} ngx_http_xslt_param_t; + + +typedef struct { + xsltStylesheetPtr stylesheet; + ngx_array_t params; /* ngx_http_xslt_param_t */ +} ngx_http_xslt_sheet_t; + + +typedef struct { + xmlDtdPtr dtd; + ngx_array_t sheets; /* ngx_http_xslt_sheet_t */ + ngx_hash_t types; + ngx_array_t *types_keys; + ngx_array_t *params; /* ngx_http_xslt_param_t */ + ngx_flag_t last_modified; +} ngx_http_xslt_filter_loc_conf_t; + + +typedef struct { + xmlDocPtr doc; + xmlParserCtxtPtr ctxt; + xsltTransformContextPtr transform; + ngx_http_request_t *request; + ngx_array_t params; + + ngx_uint_t done; /* unsigned done:1; */ +} ngx_http_xslt_filter_ctx_t; + + +static ngx_int_t ngx_http_xslt_send(ngx_http_request_t *r, + ngx_http_xslt_filter_ctx_t *ctx, ngx_buf_t *b); +static ngx_int_t ngx_http_xslt_add_chunk(ngx_http_request_t *r, + ngx_http_xslt_filter_ctx_t *ctx, ngx_buf_t *b); + + +static void ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name, + const xmlChar *externalId, const xmlChar *systemId); +static void ngx_cdecl ngx_http_xslt_sax_error(void *data, const char *msg, ...); + + +static ngx_buf_t *ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r, + ngx_http_xslt_filter_ctx_t *ctx); +static ngx_int_t ngx_http_xslt_params(ngx_http_request_t *r, + ngx_http_xslt_filter_ctx_t *ctx, ngx_array_t *params, ngx_uint_t final); +static u_char *ngx_http_xslt_content_type(xsltStylesheetPtr s); +static u_char *ngx_http_xslt_encoding(xsltStylesheetPtr s); +static void ngx_http_xslt_cleanup(void *data); + +static char *ngx_http_xslt_entities(ngx_conf_t *cf, ngx_command_t *cmd, + void *conf); +static char *ngx_http_xslt_stylesheet(ngx_conf_t *cf, ngx_command_t *cmd, + void *conf); +static char *ngx_http_xslt_param(ngx_conf_t *cf, ngx_command_t *cmd, + void *conf); +static void ngx_http_xslt_cleanup_dtd(void *data); +static void ngx_http_xslt_cleanup_stylesheet(void *data); +static void *ngx_http_xslt_filter_create_main_conf(ngx_conf_t *cf); +static void *ngx_http_xslt_filter_create_conf(ngx_conf_t *cf); +static char *ngx_http_xslt_filter_merge_conf(ngx_conf_t *cf, void *parent, + void *child); +static ngx_int_t ngx_http_xslt_filter_preconfiguration(ngx_conf_t *cf); +static ngx_int_t ngx_http_xslt_filter_init(ngx_conf_t *cf); +static void ngx_http_xslt_filter_exit(ngx_cycle_t *cycle); + + +static ngx_str_t ngx_http_xslt_default_types[] = { + ngx_string("text/xml"), + ngx_null_string +}; + + +static ngx_command_t ngx_http_xslt_filter_commands[] = { + + { ngx_string("xml_entities"), + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, + ngx_http_xslt_entities, + NGX_HTTP_LOC_CONF_OFFSET, + 0, + NULL }, + + { ngx_string("xslt_stylesheet"), + NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, + ngx_http_xslt_stylesheet, + NGX_HTTP_LOC_CONF_OFFSET, + 0, + NULL }, + + { ngx_string("xslt_param"), + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, + ngx_http_xslt_param, + NGX_HTTP_LOC_CONF_OFFSET, + 0, + NULL }, + + { ngx_string("xslt_string_param"), + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, + ngx_http_xslt_param, + NGX_HTTP_LOC_CONF_OFFSET, + 0, + (void *) 1 }, + + { ngx_string("xslt_types"), + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, + ngx_http_types_slot, + NGX_HTTP_LOC_CONF_OFFSET, + offsetof(ngx_http_xslt_filter_loc_conf_t, types_keys), + &ngx_http_xslt_default_types[0] }, + + { ngx_string("xslt_last_modified"), + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, + ngx_conf_set_flag_slot, + NGX_HTTP_LOC_CONF_OFFSET, + offsetof(ngx_http_xslt_filter_loc_conf_t, last_modified), + NULL }, + + ngx_null_command +}; + + +static ngx_http_module_t ngx_http_xslt_filter_module_ctx = { + ngx_http_xslt_filter_preconfiguration, /* preconfiguration */ + ngx_http_xslt_filter_init, /* postconfiguration */ + + ngx_http_xslt_filter_create_main_conf, /* create main configuration */ + NULL, /* init main configuration */ + + NULL, /* create server configuration */ + NULL, /* merge server configuration */ + + ngx_http_xslt_filter_create_conf, /* create location configuration */ + ngx_http_xslt_filter_merge_conf /* merge location configuration */ +}; + + +ngx_module_t ngx_http_xslt_filter_module = { + NGX_MODULE_V1, + &ngx_http_xslt_filter_module_ctx, /* module context */ + ngx_http_xslt_filter_commands, /* module directives */ + NGX_HTTP_MODULE, /* module type */ + NULL, /* init master */ + NULL, /* init module */ + NULL, /* init process */ + NULL, /* init thread */ + NULL, /* exit thread */ + ngx_http_xslt_filter_exit, /* exit process */ + ngx_http_xslt_filter_exit, /* exit master */ + NGX_MODULE_V1_PADDING +}; + + +static ngx_http_output_header_filter_pt ngx_http_next_header_filter; +static ngx_http_output_body_filter_pt ngx_http_next_body_filter; + + +static ngx_int_t +ngx_http_xslt_header_filter(ngx_http_request_t *r) +{ + ngx_http_xslt_filter_ctx_t *ctx; + ngx_http_xslt_filter_loc_conf_t *conf; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "xslt filter header"); + + if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) { + return ngx_http_next_header_filter(r); + } + + conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module); + + if (conf->sheets.nelts == 0 + || ngx_http_test_content_type(r, &conf->types) == NULL) + { + return ngx_http_next_header_filter(r); + } + + ctx = ngx_http_get_module_ctx(r, ngx_http_xslt_filter_module); + + if (ctx) { + return ngx_http_next_header_filter(r); + } + + ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_xslt_filter_ctx_t)); + if (ctx == NULL) { + return NGX_ERROR; + } + + ngx_http_set_ctx(r, ctx, ngx_http_xslt_filter_module); + + r->main_filter_need_in_memory = 1; + + return NGX_OK; +} + + +static ngx_int_t +ngx_http_xslt_body_filter(ngx_http_request_t *r, ngx_chain_t *in) +{ + int wellFormed; + ngx_chain_t *cl; + ngx_http_xslt_filter_ctx_t *ctx; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "xslt filter body"); + + if (in == NULL) { + return ngx_http_next_body_filter(r, in); + } + + ctx = ngx_http_get_module_ctx(r, ngx_http_xslt_filter_module); + + if (ctx == NULL || ctx->done) { + return ngx_http_next_body_filter(r, in); + } + + for (cl = in; cl; cl = cl->next) { + + if (ngx_http_xslt_add_chunk(r, ctx, cl->buf) != NGX_OK) { + + if (ctx->ctxt->myDoc) { + +#if (NGX_HTTP_XSLT_REUSE_DTD) + ctx->ctxt->myDoc->extSubset = NULL; +#endif + xmlFreeDoc(ctx->ctxt->myDoc); + } + + xmlFreeParserCtxt(ctx->ctxt); + + return ngx_http_xslt_send(r, ctx, NULL); + } + + if (cl->buf->last_buf || cl->buf->last_in_chain) { + + ctx->doc = ctx->ctxt->myDoc; + +#if (NGX_HTTP_XSLT_REUSE_DTD) + ctx->doc->extSubset = NULL; +#endif + + wellFormed = ctx->ctxt->wellFormed; + + xmlFreeParserCtxt(ctx->ctxt); + + if (wellFormed) { + return ngx_http_xslt_send(r, ctx, + ngx_http_xslt_apply_stylesheet(r, ctx)); + } + + xmlFreeDoc(ctx->doc); + + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "not well formed XML document"); + + return ngx_http_xslt_send(r, ctx, NULL); + } + } + + return NGX_OK; +} + + +static ngx_int_t +ngx_http_xslt_send(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx, + ngx_buf_t *b) +{ + ngx_int_t rc; + ngx_chain_t out; + ngx_pool_cleanup_t *cln; + ngx_http_xslt_filter_loc_conf_t *conf; + + ctx->done = 1; + + if (b == NULL) { + return ngx_http_filter_finalize_request(r, &ngx_http_xslt_filter_module, + NGX_HTTP_INTERNAL_SERVER_ERROR); + } + + cln = ngx_pool_cleanup_add(r->pool, 0); + + if (cln == NULL) { + ngx_free(b->pos); + return ngx_http_filter_finalize_request(r, &ngx_http_xslt_filter_module, + NGX_HTTP_INTERNAL_SERVER_ERROR); + } + + if (r == r->main) { + r->headers_out.content_length_n = b->last - b->pos; + + if (r->headers_out.content_length) { + r->headers_out.content_length->hash = 0; + r->headers_out.content_length = NULL; + } + + conf = ngx_http_get_module_loc_conf(r, ngx_http_xslt_filter_module); + + if (!conf->last_modified) { + ngx_http_clear_last_modified(r); + ngx_http_clear_etag(r); + + } else { + ngx_http_weak_etag(r); + } + } + + rc = ngx_http_next_header_filter(r); + + if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) { + ngx_free(b->pos); + return rc; + } + + cln->handler = ngx_http_xslt_cleanup; + cln->data = b->pos; + + out.buf = b; + out.next = NULL; + + return ngx_http_next_body_filter(r, &out); +} + + +static ngx_int_t +ngx_http_xslt_add_chunk(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx, + ngx_buf_t *b) +{ + int err; + xmlParserCtxtPtr ctxt; + + if (ctx->ctxt == NULL) { + + ctxt = xmlCreatePushParserCtxt(NULL, NULL, NULL, 0, NULL); + if (ctxt == NULL) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "xmlCreatePushParserCtxt() failed"); + return NGX_ERROR; + } + xmlCtxtUseOptions(ctxt, XML_PARSE_NOENT|XML_PARSE_DTDLOAD + |XML_PARSE_NOWARNING); + + ctxt->sax->externalSubset = ngx_http_xslt_sax_external_subset; + ctxt->sax->setDocumentLocator = NULL; + ctxt->sax->error = ngx_http_xslt_sax_error; + ctxt->sax->fatalError = ngx_http_xslt_sax_error; + ctxt->sax->_private = ctx; + + ctx->ctxt = ctxt; + ctx->request = r; + } + + err = xmlParseChunk(ctx->ctxt, (char *) b->pos, (int) (b->last - b->pos), + (b->last_buf) || (b->last_in_chain)); + + if (err == 0) { + b->pos = b->last; + return NGX_OK; + } + + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "xmlParseChunk() failed, error:%d", err); + + return NGX_ERROR; +} + + +static void +ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name, + const xmlChar *externalId, const xmlChar *systemId) +{ + xmlParserCtxtPtr ctxt = data; + + xmlDocPtr doc; + xmlDtdPtr dtd; + ngx_http_request_t *r; + ngx_http_xslt_filter_ctx_t *ctx; + ngx_http_xslt_filter_loc_conf_t *conf; + + ctx = ctxt->sax->_private; + 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 = 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_cdecl +ngx_http_xslt_sax_error(void *data, const char *msg, ...) +{ + xmlParserCtxtPtr ctxt = data; + + size_t n; + va_list args; + ngx_http_xslt_filter_ctx_t *ctx; + u_char buf[NGX_MAX_ERROR_STR]; + + ctx = ctxt->sax->_private; + + 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++) { + + ctx->transform = xsltNewTransformContext(sheet[i].stylesheet, doc); + if (ctx->transform == NULL) { + xmlFreeDoc(doc); + return NULL; + } + + if (conf->params + && ngx_http_xslt_params(r, ctx, conf->params, 0) != NGX_OK) + { + xsltFreeTransformContext(ctx->transform); + xmlFreeDoc(doc); + return NULL; + } + + if (ngx_http_xslt_params(r, ctx, &sheet[i].params, 1) != NGX_OK) { + xsltFreeTransformContext(ctx->transform); + xmlFreeDoc(doc); + return NULL; + } + + res = xsltApplyStylesheetUser(sheet[i].stylesheet, doc, + ctx->params.elts, NULL, NULL, + ctx->transform); + + xsltFreeTransformContext(ctx->transform); + 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; + ngx_str_set(&r->headers_out.content_type, "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, ngx_uint_t final) +{ + u_char *p, *last, *value, *dst, *src, **s; + size_t len; + ngx_uint_t i; + ngx_str_t string; + ngx_http_xslt_param_t *param; + + param = params->elts; + + for (i = 0; i < params->nelts; i++) { + + if (ngx_http_complex_value(r, ¶m[i].value, &string) != NGX_OK) { + return NGX_ERROR; + } + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "xslt filter param: \"%s\"", string.data); + + if (param[i].name) { + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "xslt filter param name: \"%s\"", param[i].name); + + if (param[i].quote) { + if (xsltQuoteOneUserParam(ctx->transform, param[i].name, + string.data) + != 0) + { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "xsltQuoteOneUserParam(\"%s\", \"%s\") failed", + param[i].name, string.data); + return NGX_ERROR; + } + + continue; + } + + s = ngx_array_push(&ctx->params); + if (s == NULL) { + return NGX_ERROR; + } + + *s = param[i].name; + + s = ngx_array_push(&ctx->params); + if (s == NULL) { + return NGX_ERROR; + } + + *s = string.data; + + continue; + } + + /* + * parse param1=value1:param2=value2 syntax as used by parameters + * specified in xslt_stylesheet directives + */ + + p = string.data; + last = string.data + string.len; + + 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; + } + } + + if (final) { + 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_xslt_param_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_xslt_param_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(param, sizeof(ngx_http_xslt_param_t)); + ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); + + ccv.cf = cf; + ccv.value = &value[i]; + ccv.complex_value = ¶m->value; + ccv.zero = 1; + + if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { + return NGX_CONF_ERROR; + } + } + + return NGX_CONF_OK; +} + + +static char * +ngx_http_xslt_param(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) +{ + ngx_http_xslt_filter_loc_conf_t *xlcf = conf; + + ngx_http_xslt_param_t *param; + ngx_http_compile_complex_value_t ccv; + ngx_str_t *value; + + value = cf->args->elts; + + if (xlcf->params == NULL) { + xlcf->params = ngx_array_create(cf->pool, 2, + sizeof(ngx_http_xslt_param_t)); + if (xlcf->params == NULL) { + return NGX_CONF_ERROR; + } + } + + param = ngx_array_push(xlcf->params); + if (param == NULL) { + return NGX_CONF_ERROR; + } + + param->name = value[1].data; + param->quote = (cmd->post == NULL) ? 0 : 1; + + ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); + + ccv.cf = cf; + ccv.value = &value[2]; + ccv.complex_value = ¶m->value; + 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; + * conf->params = NULL; + */ + + conf->last_modified = NGX_CONF_UNSET; + + 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 (conf->params == NULL) { + conf->params = prev->params; + } + + 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; + } + + ngx_conf_merge_value(conf->last_modified, prev->last_modified, 0); + + return NGX_CONF_OK; +} + + +static ngx_int_t +ngx_http_xslt_filter_preconfiguration(ngx_conf_t *cf) +{ + xmlInitParser(); + +#if (NGX_HAVE_EXSLT) + exsltRegisterAll(); +#endif + + return NGX_OK; +} + + +static ngx_int_t +ngx_http_xslt_filter_init(ngx_conf_t *cf) +{ + 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(); +} |