Mercurial > hg > nginx
view src/http/modules/ngx_http_xslt_filter_module.c @ 3440:88741ec7731a stable-0.7
merge r3294, r3305:
Fix a bug introduced in r2032: After a child process has read a terminate
message from a channel, the process tries to read the channel again.
The kernel (at least FreeBSD) may preempt the process and sends a SIGIO
signal to a master process. The master process sends a new terminate message,
the kernel switches again to the the child process, and the child process
reads the messages instead of an EAGAIN error. And this may repeat over
and over. Being that the child process can not exit the cycle and test
the termination flag set by the message handler.
The fix disallow the master process to send a new terminate message on
SIGIO signal reception. It may send the message only on SIGALARM signal.
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Mon, 01 Feb 2010 15:49:36 +0000 |
parents | 415400fa0f10 |
children |
line wrap: on
line source
/* * Copyright (C) Igor Sysoev */ #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/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 { xsltStylesheetPtr stylesheet; ngx_array_t params; /* ngx_http_complex_value_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_http_xslt_filter_loc_conf_t; typedef struct { xmlDocPtr doc; xmlParserCtxtPtr ctxt; xmlSAXHandler *sax; 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_start_document(void *data); static void ngx_http_xslt_sax_end_document(void *data); static void ngx_http_xslt_sax_internal_subset(void *data, const xmlChar *name, const xmlChar *externalId, const xmlChar *systemId); static void ngx_http_xslt_sax_external_subset(void *data, const xmlChar *name, const xmlChar *externalId, const xmlChar *systemId); static void ngx_http_xslt_sax_entity_decl(void *data, const xmlChar *name, int type, const xmlChar *publicId, const xmlChar *systemId, xmlChar *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); static void ngx_http_xslt_sax_element_decl(void *data, const xmlChar * name, int type, xmlElementContentPtr content); static void ngx_http_xslt_sax_notation_decl(void *data, const xmlChar *name, const xmlChar *publicId, const xmlChar *systemId); static void ngx_http_xslt_sax_unparsed_entity_decl(void *data, const xmlChar *name, const xmlChar *publicId, const xmlChar *systemId, const xmlChar *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); 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); static void ngx_http_xslt_sax_characters(void *data, const xmlChar *p, int len); static void ngx_http_xslt_sax_cdata_block(void *data, const xmlChar *p, int len); static xmlEntityPtr ngx_http_xslt_sax_get_entity(void *data, const xmlChar *name); static xmlEntityPtr ngx_http_xslt_sax_get_parameter_entity(void *data, const xmlChar *name); static xmlParserInputPtr ngx_http_xslt_sax_resolve_entity(void *data, const xmlChar *publicId, const xmlChar *systemId); static void ngx_http_xslt_sax_reference(void *data, const xmlChar *name); static void ngx_http_xslt_sax_comment(void *data, const xmlChar *value); static void ngx_http_xslt_sax_processing_instruction(void *data, const xmlChar *target, const xmlChar *pidata); static int ngx_http_xslt_sax_is_standalone(void *data); static int ngx_http_xslt_sax_has_internal_subset(void *data); static int ngx_http_xslt_sax_has_external_subset(void *data); 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); 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 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_init(ngx_conf_t *cf); static void ngx_http_xslt_filter_exit(ngx_cycle_t *cycle); 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_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_null_command }; static ngx_http_module_t ngx_http_xslt_filter_module_ctx = { NULL, /* 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; ctx->done = 1; if (b == NULL) { return ngx_http_filter_finalize_request(r, NULL, 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, NULL, 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; } ngx_http_clear_last_modified(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; xmlSAXHandler *sax; 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; } ctx->sax = ngx_palloc(r->pool, sizeof(xmlSAXHandler)); if (ctx->sax == NULL) { return NGX_ERROR; } sax = ctxt->sax; ngx_memcpy(ctx->sax, sax, sizeof(xmlSAXHandler)); sax->startDocument = ngx_http_xslt_sax_start_document; sax->endDocument = ngx_http_xslt_sax_end_document; sax->internalSubset = ngx_http_xslt_sax_internal_subset; sax->externalSubset = ngx_http_xslt_sax_external_subset; sax->entityDecl = ngx_http_xslt_sax_entity_decl; sax->attributeDecl = ngx_http_xslt_sax_attribute_decl; sax->elementDecl = ngx_http_xslt_sax_element_decl; sax->notationDecl = ngx_http_xslt_sax_notation_decl; sax->unparsedEntityDecl = ngx_http_xslt_sax_unparsed_entity_decl; sax->setDocumentLocator = NULL; sax->startElementNs = ngx_http_xslt_sax_start_element; sax->endElementNs = ngx_http_xslt_sax_end_element; sax->characters = ngx_http_xslt_sax_characters; sax->ignorableWhitespace = ngx_http_xslt_sax_characters; sax->cdataBlock = ngx_http_xslt_sax_cdata_block; sax->getEntity = ngx_http_xslt_sax_get_entity; sax->resolveEntity = ngx_http_xslt_sax_resolve_entity; sax->getParameterEntity = ngx_http_xslt_sax_get_parameter_entity; sax->reference = ngx_http_xslt_sax_reference; sax->comment = ngx_http_xslt_sax_comment; sax->processingInstruction = ngx_http_xslt_sax_processing_instruction; sax->isStandalone = ngx_http_xslt_sax_is_standalone; sax->hasInternalSubset = ngx_http_xslt_sax_has_internal_subset; sax->hasExternalSubset = ngx_http_xslt_sax_has_external_subset; sax->warning = NULL; sax->error = ngx_http_xslt_sax_error; sax->fatalError = ngx_http_xslt_sax_error; ctxt->userData = ctx; ctxt->replaceEntities = 1; ctxt->loadsubset = 1; 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_start_document(void *data) { ngx_http_xslt_filter_ctx_t *ctx = data; ctx->sax->startDocument(ctx->ctxt); } static void ngx_http_xslt_sax_end_document(void *data) { ngx_http_xslt_filter_ctx_t *ctx = data; ctx->sax->endDocument(ctx->ctxt); } 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(); }