| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| /* |
| ** DAV extension module for Apache 2.0.* |
| ** - XML parser for the body of a request |
| */ |
| |
| /* James Clark's Expat parser */ |
| #include "xmlparse.h" |
| |
| #include "apr.h" |
| #include "apr_strings.h" |
| |
| #define APR_WANT_STDIO /* for fprintf(), sprintf() */ |
| #define APR_WANT_STRFUNC |
| #include "apr_want.h" |
| |
| #include "httpd.h" |
| #include "http_protocol.h" |
| #include "http_log.h" |
| #include "http_core.h" |
| |
| #include "util_xml.h" |
| |
| |
| #define DEBUG_CR "\r\n" |
| |
| #define AP_XML_READ_BLOCKSIZE 2048 /* used for reading input blocks */ |
| |
| /* errors related to namespace processing */ |
| #define AP_XML_NS_ERROR_UNKNOWN_PREFIX (AP_XML_NS_ERROR_BASE) |
| |
| /* test for a namespace prefix that begins with [Xx][Mm][Ll] */ |
| #define AP_XML_NS_IS_RESERVED(name) \ |
| ( (name[0] == 'X' || name[0] == 'x') && \ |
| (name[1] == 'M' || name[1] == 'm') && \ |
| (name[2] == 'L' || name[2] == 'l') ) |
| |
| |
| /* content for parsing */ |
| typedef struct ap_xml_ctx { |
| ap_xml_doc *doc; /* the doc we're parsing */ |
| apr_pool_t *p; /* the pool we allocate from */ |
| ap_xml_elem *cur_elem; /* current element */ |
| |
| int error; /* an error has occurred */ |
| /* errors may be AP_XML_NS_ERROR_* or other private errors which will |
| be defined here (none yet) */ |
| |
| } ap_xml_ctx; |
| |
| /* struct for scoping namespace declarations */ |
| typedef struct ap_xml_ns_scope { |
| const char *prefix; /* prefix used for this ns */ |
| int ns; /* index into namespace table */ |
| int emptyURI; /* the namespace URI is the empty string */ |
| struct ap_xml_ns_scope *next; /* next scoped namespace */ |
| } ap_xml_ns_scope; |
| |
| |
| /* return namespace table index for a given prefix */ |
| static int find_prefix(ap_xml_ctx *ctx, const char *prefix) |
| { |
| ap_xml_elem *elem = ctx->cur_elem; |
| |
| /* |
| ** Walk up the tree, looking for a namespace scope that defines this |
| ** prefix. |
| */ |
| for (; elem; elem = elem->parent) { |
| ap_xml_ns_scope *ns_scope = elem->ns_scope; |
| |
| for (ns_scope = elem->ns_scope; ns_scope; ns_scope = ns_scope->next) { |
| if (strcmp(prefix, ns_scope->prefix) == 0) { |
| if (ns_scope->emptyURI) { |
| /* |
| ** It is possible to set the default namespace to an |
| ** empty URI string; this resets the default namespace |
| ** to mean "no namespace." We just found the prefix |
| ** refers to an empty URI, so return "no namespace." |
| */ |
| return AP_XML_NS_NONE; |
| } |
| |
| return ns_scope->ns; |
| } |
| } |
| } |
| |
| /* |
| * If the prefix is empty (""), this means that a prefix was not |
| * specified in the element/attribute. The search that was performed |
| * just above did not locate a default namespace URI (which is stored |
| * into ns_scope with an empty prefix). This means the element/attribute |
| * has "no namespace". We have a reserved value for this. |
| */ |
| if (*prefix == '\0') { |
| return AP_XML_NS_NONE; |
| } |
| |
| /* not found */ |
| return AP_XML_NS_ERROR_UNKNOWN_PREFIX; |
| } |
| |
| static void start_handler(void *userdata, const char *name, const char **attrs) |
| { |
| ap_xml_ctx *ctx = userdata; |
| ap_xml_elem *elem; |
| ap_xml_attr *attr; |
| ap_xml_attr *prev; |
| char *colon; |
| const char *quoted; |
| char *elem_name; |
| |
| /* punt once we find an error */ |
| if (ctx->error) |
| return; |
| |
| elem = apr_pcalloc(ctx->p, sizeof(*elem)); |
| |
| /* prep the element */ |
| elem->name = elem_name = apr_pstrdup(ctx->p, name); |
| |
| /* fill in the attributes (note: ends up in reverse order) */ |
| while (*attrs) { |
| attr = apr_palloc(ctx->p, sizeof(*attr)); |
| attr->name = apr_pstrdup(ctx->p, *attrs++); |
| attr->value = apr_pstrdup(ctx->p, *attrs++); |
| attr->next = elem->attr; |
| elem->attr = attr; |
| } |
| |
| /* hook the element into the tree */ |
| if (ctx->cur_elem == NULL) { |
| /* no current element; this also becomes the root */ |
| ctx->cur_elem = ctx->doc->root = elem; |
| } |
| else { |
| /* this element appeared within the current elem */ |
| elem->parent = ctx->cur_elem; |
| |
| /* set up the child/sibling links */ |
| if (elem->parent->last_child == NULL) { |
| /* no first child either */ |
| elem->parent->first_child = elem->parent->last_child = elem; |
| } |
| else { |
| /* hook onto the end of the parent's children */ |
| elem->parent->last_child->next = elem; |
| elem->parent->last_child = elem; |
| } |
| |
| /* this element is now the current element */ |
| ctx->cur_elem = elem; |
| } |
| |
| /* scan the attributes for namespace declarations */ |
| for (prev = NULL, attr = elem->attr; |
| attr; |
| attr = attr->next) { |
| if (strncmp(attr->name, "xmlns", 5) == 0) { |
| const char *prefix = &attr->name[5]; |
| ap_xml_ns_scope *ns_scope; |
| |
| /* test for xmlns:foo= form and xmlns= form */ |
| if (*prefix == ':') |
| ++prefix; |
| else if (*prefix != '\0') { |
| /* advance "prev" since "attr" is still present */ |
| prev = attr; |
| continue; |
| } |
| |
| /* quote the URI before we ever start working with it */ |
| quoted = ap_xml_quote_string(ctx->p, attr->value, 1); |
| |
| /* build and insert the new scope */ |
| ns_scope = apr_pcalloc(ctx->p, sizeof(*ns_scope)); |
| ns_scope->prefix = prefix; |
| ns_scope->ns = ap_xml_insert_uri(ctx->doc->namespaces, quoted); |
| ns_scope->emptyURI = *quoted == '\0'; |
| ns_scope->next = elem->ns_scope; |
| elem->ns_scope = ns_scope; |
| |
| /* remove this attribute from the element */ |
| if (prev == NULL) |
| elem->attr = attr->next; |
| else |
| prev->next = attr->next; |
| |
| /* Note: prev will not be advanced since we just removed "attr" */ |
| } |
| else if (strcmp(attr->name, "xml:lang") == 0) { |
| /* save away the language (in quoted form) */ |
| elem->lang = ap_xml_quote_string(ctx->p, attr->value, 1); |
| |
| /* remove this attribute from the element */ |
| if (prev == NULL) |
| elem->attr = attr->next; |
| else |
| prev->next = attr->next; |
| |
| /* Note: prev will not be advanced since we just removed "attr" */ |
| } |
| else { |
| /* advance "prev" since "attr" is still present */ |
| prev = attr; |
| } |
| } |
| |
| /* |
| ** If an xml:lang attribute didn't exist (lang==NULL), then copy the |
| ** language from the parent element (if present). |
| ** |
| ** NOTE: elem_size() *depends* upon this pointer equality. |
| */ |
| if (elem->lang == NULL && elem->parent != NULL) |
| elem->lang = elem->parent->lang; |
| |
| /* adjust the element's namespace */ |
| colon = ap_strchr(elem_name, ':'); |
| if (colon == NULL) { |
| /* |
| * The element is using the default namespace, which will always |
| * be found. Either it will be "no namespace", or a default |
| * namespace URI has been specified at some point. |
| */ |
| elem->ns = find_prefix(ctx, ""); |
| } |
| else if (AP_XML_NS_IS_RESERVED(elem->name)) { |
| elem->ns = AP_XML_NS_NONE; |
| } |
| else { |
| *colon = '\0'; |
| elem->ns = find_prefix(ctx, elem->name); |
| elem->name = colon + 1; |
| |
| if (AP_XML_NS_IS_ERROR(elem->ns)) { |
| ctx->error = elem->ns; |
| return; |
| } |
| } |
| |
| /* adjust all remaining attributes' namespaces */ |
| for (attr = elem->attr; attr; attr = attr->next) { |
| /* |
| * ap_xml_attr defines this as "const" but we dup'd it, so we |
| * know that we can change it. a bit hacky, but the existing |
| * structure def is best. |
| */ |
| char *attr_name = (char *)attr->name; |
| |
| colon = ap_strchr(attr_name, ':'); |
| if (colon == NULL) { |
| /* |
| * Attributes do NOT use the default namespace. Therefore, |
| * we place them into the "no namespace" category. |
| */ |
| attr->ns = AP_XML_NS_NONE; |
| } |
| else if (AP_XML_NS_IS_RESERVED(attr->name)) { |
| attr->ns = AP_XML_NS_NONE; |
| } |
| else { |
| *colon = '\0'; |
| attr->ns = find_prefix(ctx, attr->name); |
| attr->name = colon + 1; |
| |
| if (AP_XML_NS_IS_ERROR(attr->ns)) { |
| ctx->error = attr->ns; |
| return; |
| } |
| } |
| } |
| } |
| |
| static void end_handler(void *userdata, const char *name) |
| { |
| ap_xml_ctx *ctx = userdata; |
| |
| /* punt once we find an error */ |
| if (ctx->error) |
| return; |
| |
| /* pop up one level */ |
| ctx->cur_elem = ctx->cur_elem->parent; |
| } |
| |
| static void cdata_handler(void *userdata, const char *data, int len) |
| { |
| ap_xml_ctx *ctx = userdata; |
| ap_xml_elem *elem; |
| ap_text_header *hdr; |
| const char *s; |
| |
| /* punt once we find an error */ |
| if (ctx->error) |
| return; |
| |
| elem = ctx->cur_elem; |
| s = apr_pstrndup(ctx->p, data, len); |
| |
| if (elem->last_child == NULL) { |
| /* no children yet. this cdata follows the start tag */ |
| hdr = &elem->first_cdata; |
| } |
| else { |
| /* child elements exist. this cdata follows the last child. */ |
| hdr = &elem->last_child->following_cdata; |
| } |
| |
| ap_text_append(ctx->p, hdr, s); |
| } |
| |
| AP_DECLARE(int) ap_xml_parse_input(request_rec * r, ap_xml_doc **pdoc) |
| { |
| int result; |
| ap_xml_ctx ctx = { 0 }; |
| XML_Parser parser; |
| |
| if ((result = ap_setup_client_block(r, REQUEST_CHUNKED_DECHUNK)) != OK) |
| return result; |
| |
| if (r->remaining == 0) { |
| *pdoc = NULL; |
| return OK; |
| } |
| |
| ctx.p = r->pool; |
| ctx.doc = apr_pcalloc(ctx.p, sizeof(*ctx.doc)); |
| |
| ctx.doc->namespaces = apr_array_make(ctx.p, 5, sizeof(const char *)); |
| ap_xml_insert_uri(ctx.doc->namespaces, "DAV:"); |
| |
| /* ### we should get the encoding from Content-Encoding */ |
| parser = XML_ParserCreate(NULL); |
| if (parser == NULL) { |
| /* ### anything better to do? */ |
| fprintf(stderr, "Ouch! XML_ParserCreate() failed!\n"); |
| exit(1); |
| } |
| |
| XML_SetUserData(parser, (void *) &ctx); |
| XML_SetElementHandler(parser, start_handler, end_handler); |
| XML_SetCharacterDataHandler(parser, cdata_handler); |
| |
| if (ap_should_client_block(r)) { |
| long len; |
| char *buffer; |
| char end; |
| int rv; |
| apr_size_t total_read = 0; |
| apr_size_t limit_xml_body = ap_get_limit_xml_body(r); |
| |
| /* allocate our working buffer */ |
| buffer = apr_palloc(r->pool, AP_XML_READ_BLOCKSIZE); |
| |
| /* read the body, stuffing it into the parser */ |
| while ((len = ap_get_client_block(r, buffer, AP_XML_READ_BLOCKSIZE)) > 0) { |
| total_read += len; |
| if (limit_xml_body && total_read > limit_xml_body) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR | APLOG_NOERRNO, 0, r, |
| "XML request body is larger than the configured " |
| "limit of %lu", (unsigned long)limit_xml_body); |
| goto read_error; |
| } |
| |
| rv = XML_Parse(parser, buffer, len, 0); |
| if (rv == 0) |
| goto parser_error; |
| } |
| if (len == -1) { |
| /* ap_get_client_block() has logged an error */ |
| goto read_error; |
| } |
| |
| /* tell the parser that we're done */ |
| rv = XML_Parse(parser, &end, 0, 1); |
| if (rv == 0) |
| goto parser_error; |
| } |
| |
| XML_ParserFree(parser); |
| |
| if (ctx.error) { |
| switch (ctx.error) { |
| case AP_XML_NS_ERROR_UNKNOWN_PREFIX: |
| ap_log_rerror(APLOG_MARK, APLOG_ERR | APLOG_NOERRNO, 0, r, |
| "An undefined namespace prefix was used."); |
| break; |
| |
| default: |
| ap_log_rerror(APLOG_MARK, APLOG_ERR | APLOG_NOERRNO, 0, r, |
| "There was an error within the XML request body."); |
| break; |
| } |
| |
| /* Apache will supply a default error, plus the error log above. */ |
| return HTTP_BAD_REQUEST; |
| } |
| |
| /* ### assert: ctx.cur_elem == NULL */ |
| |
| *pdoc = ctx.doc; |
| |
| return OK; |
| |
| parser_error: |
| { |
| enum XML_Error err = XML_GetErrorCode(parser); |
| |
| /* ### fix this error message (default vs special) */ |
| ap_log_rerror(APLOG_MARK, APLOG_ERR | APLOG_NOERRNO, 0, r, |
| "XML parser error code: %s (%d).", |
| XML_ErrorString(err), err); |
| |
| XML_ParserFree(parser); |
| |
| /* Apache will supply a default error, plus the error log above. */ |
| return HTTP_BAD_REQUEST; |
| } |
| |
| read_error: |
| XML_ParserFree(parser); |
| |
| /* Apache will supply a default error, plus whatever was logged. */ |
| return HTTP_BAD_REQUEST; |
| } |
| |
| AP_DECLARE(void) ap_text_append(apr_pool_t * p, ap_text_header *hdr, |
| const char *text) |
| { |
| ap_text *t = apr_palloc(p, sizeof(*t)); |
| |
| t->text = text; |
| t->next = NULL; |
| |
| if (hdr->first == NULL) { |
| /* no text elements yet */ |
| hdr->first = hdr->last = t; |
| } |
| else { |
| /* append to the last text element */ |
| hdr->last->next = t; |
| hdr->last = t; |
| } |
| } |
| |
| |
| /* --------------------------------------------------------------- |
| ** |
| ** XML UTILITY FUNCTIONS |
| */ |
| |
| /* |
| ** ap_xml_quote_string: quote an XML string |
| ** |
| ** Replace '<', '>', and '&' with '<', '>', and '&'. |
| ** If quotes is true, then replace '"' with '"'. |
| ** |
| ** quotes is typically set to true for XML strings that will occur within |
| ** double quotes -- attribute values. |
| */ |
| AP_DECLARE(const char *) ap_xml_quote_string(apr_pool_t *p, const char *s, |
| int quotes) |
| { |
| const char *scan; |
| apr_size_t len = 0; |
| apr_size_t extra = 0; |
| char *qstr; |
| char *qscan; |
| char c; |
| |
| for (scan = s; (c = *scan) != '\0'; ++scan, ++len) { |
| if (c == '<' || c == '>') |
| extra += 3; /* < or > */ |
| else if (c == '&') |
| extra += 4; /* & */ |
| else if (quotes && c == '"') |
| extra += 5; /* " */ |
| } |
| |
| /* nothing to do? */ |
| if (extra == 0) |
| return s; |
| |
| qstr = apr_palloc(p, len + extra + 1); |
| for (scan = s, qscan = qstr; (c = *scan) != '\0'; ++scan) { |
| if (c == '<') { |
| *qscan++ = '&'; |
| *qscan++ = 'l'; |
| *qscan++ = 't'; |
| *qscan++ = ';'; |
| } |
| else if (c == '>') { |
| *qscan++ = '&'; |
| *qscan++ = 'g'; |
| *qscan++ = 't'; |
| *qscan++ = ';'; |
| } |
| else if (c == '&') { |
| *qscan++ = '&'; |
| *qscan++ = 'a'; |
| *qscan++ = 'm'; |
| *qscan++ = 'p'; |
| *qscan++ = ';'; |
| } |
| else if (quotes && c == '"') { |
| *qscan++ = '&'; |
| *qscan++ = 'q'; |
| *qscan++ = 'u'; |
| *qscan++ = 'o'; |
| *qscan++ = 't'; |
| *qscan++ = ';'; |
| } |
| else { |
| *qscan++ = c; |
| } |
| } |
| |
| *qscan = '\0'; |
| return qstr; |
| } |
| |
| /* how many characters for the given integer? */ |
| #define AP_XML_NS_LEN(ns) ((ns) < 10 ? 1 : (ns) < 100 ? 2 : (ns) < 1000 ? 3 : \ |
| (ns) < 10000 ? 4 : (ns) < 100000 ? 5 : \ |
| (ns) < 1000000 ? 6 : (ns) < 10000000 ? 7 : \ |
| (ns) < 100000000 ? 8 : (ns) < 1000000000 ? 9 : 10) |
| |
| static apr_size_t text_size(const ap_text *t) |
| { |
| apr_size_t size = 0; |
| |
| for (; t; t = t->next) |
| size += strlen(t->text); |
| return size; |
| } |
| |
| static apr_size_t elem_size(const ap_xml_elem *elem, int style, |
| apr_array_header_t *namespaces, int *ns_map) |
| { |
| apr_size_t size; |
| |
| if (style == AP_XML_X2T_FULL || style == AP_XML_X2T_FULL_NS_LANG) { |
| const ap_xml_attr *attr; |
| |
| size = 0; |
| |
| if (style == AP_XML_X2T_FULL_NS_LANG) { |
| int i; |
| |
| /* |
| ** The outer element will contain xmlns:ns%d="%s" attributes |
| ** and an xml:lang attribute, if applicable. |
| */ |
| |
| for (i = namespaces->nelts; i--;) { |
| /* compute size of: ' xmlns:ns%d="%s"' */ |
| size += (9 + AP_XML_NS_LEN(i) + 2 + |
| strlen(AP_XML_GET_URI_ITEM(namespaces, i)) + 1); |
| } |
| |
| if (elem->lang != NULL) { |
| /* compute size of: ' xml:lang="%s"' */ |
| size += 11 + strlen(elem->lang) + 1; |
| } |
| } |
| |
| if (elem->ns == AP_XML_NS_NONE) { |
| /* compute size of: <%s> */ |
| size += 1 + strlen(elem->name) + 1; |
| } |
| else { |
| int ns = ns_map ? ns_map[elem->ns] : elem->ns; |
| |
| /* compute size of: <ns%d:%s> */ |
| size += 3 + AP_XML_NS_LEN(ns) + 1 + strlen(elem->name) + 1; |
| } |
| |
| if (AP_XML_ELEM_IS_EMPTY(elem)) { |
| /* insert a closing "/" */ |
| size += 1; |
| } |
| else { |
| /* |
| * two of above plus "/": |
| * <ns%d:%s> ... </ns%d:%s> |
| * OR <%s> ... </%s> |
| */ |
| size = 2 * size + 1; |
| } |
| |
| for (attr = elem->attr; attr; attr = attr->next) { |
| if (attr->ns == AP_XML_NS_NONE) { |
| /* compute size of: ' %s="%s"' */ |
| size += 1 + strlen(attr->name) + 2 + strlen(attr->value) + 1; |
| } |
| else { |
| /* compute size of: ' ns%d:%s="%s"' */ |
| size += 3 + AP_XML_NS_LEN(attr->ns) + 1 + strlen(attr->name) + 2 + strlen(attr->value) + 1; |
| } |
| } |
| |
| /* |
| ** If the element has an xml:lang value that is *different* from |
| ** its parent, then add the thing in: ' xml:lang="%s"'. |
| ** |
| ** NOTE: we take advantage of the pointer equality established by |
| ** the parsing for "inheriting" the xml:lang values from parents. |
| */ |
| if (elem->lang != NULL && |
| (elem->parent == NULL || elem->lang != elem->parent->lang)) { |
| size += 11 + strlen(elem->lang) + 1; |
| } |
| } |
| else if (style == AP_XML_X2T_LANG_INNER) { |
| /* |
| * This style prepends the xml:lang value plus a null terminator. |
| * If a lang value is not present, then we insert a null term. |
| */ |
| size = elem->lang ? strlen(elem->lang) + 1 : 1; |
| } |
| else |
| size = 0; |
| |
| size += text_size(elem->first_cdata.first); |
| |
| for (elem = elem->first_child; elem; elem = elem->next) { |
| /* the size of the child element plus the CDATA that follows it */ |
| size += (elem_size(elem, AP_XML_X2T_FULL, NULL, ns_map) + |
| text_size(elem->following_cdata.first)); |
| } |
| |
| return size; |
| } |
| |
| static char *write_text(char *s, const ap_text *t) |
| { |
| for (; t; t = t->next) { |
| apr_size_t len = strlen(t->text); |
| memcpy(s, t->text, len); |
| s += len; |
| } |
| return s; |
| } |
| |
| static char *write_elem(char *s, const ap_xml_elem *elem, int style, |
| apr_array_header_t *namespaces, int *ns_map) |
| { |
| const ap_xml_elem *child; |
| apr_size_t len; |
| int ns; |
| |
| if (style == AP_XML_X2T_FULL || style == AP_XML_X2T_FULL_NS_LANG) { |
| int empty = AP_XML_ELEM_IS_EMPTY(elem); |
| const ap_xml_attr *attr; |
| |
| if (elem->ns == AP_XML_NS_NONE) { |
| len = sprintf(s, "<%s", elem->name); |
| } |
| else { |
| ns = ns_map ? ns_map[elem->ns] : elem->ns; |
| len = sprintf(s, "<ns%d:%s", ns, elem->name); |
| } |
| s += len; |
| |
| for (attr = elem->attr; attr; attr = attr->next) { |
| if (attr->ns == AP_XML_NS_NONE) |
| len = sprintf(s, " %s=\"%s\"", attr->name, attr->value); |
| else |
| len = sprintf(s, " ns%d:%s=\"%s\"", attr->ns, attr->name, attr->value); |
| s += len; |
| } |
| |
| /* add the xml:lang value if necessary */ |
| if (elem->lang != NULL && |
| (style == AP_XML_X2T_FULL_NS_LANG || |
| elem->parent == NULL || |
| elem->lang != elem->parent->lang)) { |
| len = sprintf(s, " xml:lang=\"%s\"", elem->lang); |
| s += len; |
| } |
| |
| /* add namespace definitions, if required */ |
| if (style == AP_XML_X2T_FULL_NS_LANG) { |
| int i; |
| |
| for (i = namespaces->nelts; i--;) { |
| len = sprintf(s, " xmlns:ns%d=\"%s\"", i, |
| AP_XML_GET_URI_ITEM(namespaces, i)); |
| s += len; |
| } |
| } |
| |
| /* no more to do. close it up and go. */ |
| if (empty) { |
| *s++ = '/'; |
| *s++ = '>'; |
| return s; |
| } |
| |
| /* just close it */ |
| *s++ = '>'; |
| } |
| else if (style == AP_XML_X2T_LANG_INNER) { |
| /* prepend the xml:lang value */ |
| if (elem->lang != NULL) { |
| len = strlen(elem->lang); |
| memcpy(s, elem->lang, len); |
| s += len; |
| } |
| *s++ = '\0'; |
| } |
| |
| s = write_text(s, elem->first_cdata.first); |
| |
| for (child = elem->first_child; child; child = child->next) { |
| s = write_elem(s, child, AP_XML_X2T_FULL, NULL, ns_map); |
| s = write_text(s, child->following_cdata.first); |
| } |
| |
| if (style == AP_XML_X2T_FULL || style == AP_XML_X2T_FULL_NS_LANG) { |
| if (elem->ns == AP_XML_NS_NONE) { |
| len = sprintf(s, "</%s>", elem->name); |
| } |
| else { |
| ns = ns_map ? ns_map[elem->ns] : elem->ns; |
| len = sprintf(s, "</ns%d:%s>", ns, elem->name); |
| } |
| s += len; |
| } |
| |
| return s; |
| } |
| |
| AP_DECLARE(void) ap_xml_quote_elem(apr_pool_t *p, ap_xml_elem *elem) |
| { |
| ap_text *scan_txt; |
| ap_xml_attr *scan_attr; |
| ap_xml_elem *scan_elem; |
| |
| /* convert the element's text */ |
| for (scan_txt = elem->first_cdata.first; |
| scan_txt != NULL; |
| scan_txt = scan_txt->next) { |
| scan_txt->text = ap_xml_quote_string(p, scan_txt->text, 0); |
| } |
| for (scan_txt = elem->following_cdata.first; |
| scan_txt != NULL; |
| scan_txt = scan_txt->next) { |
| scan_txt->text = ap_xml_quote_string(p, scan_txt->text, 0); |
| } |
| |
| /* convert the attribute values */ |
| for (scan_attr = elem->attr; |
| scan_attr != NULL; |
| scan_attr = scan_attr->next) { |
| scan_attr->value = ap_xml_quote_string(p, scan_attr->value, 1); |
| } |
| |
| /* convert the child elements */ |
| for (scan_elem = elem->first_child; |
| scan_elem != NULL; |
| scan_elem = scan_elem->next) { |
| ap_xml_quote_elem(p, scan_elem); |
| } |
| } |
| |
| /* convert an element to a text string */ |
| AP_DECLARE(void) ap_xml_to_text(apr_pool_t * p, const ap_xml_elem *elem, |
| int style, apr_array_header_t *namespaces, |
| int *ns_map, const char **pbuf, |
| apr_size_t *psize) |
| { |
| /* get the exact size, plus a null terminator */ |
| apr_size_t size = elem_size(elem, style, namespaces, ns_map) + 1; |
| char *s = apr_palloc(p, size); |
| |
| (void) write_elem(s, elem, style, namespaces, ns_map); |
| s[size - 1] = '\0'; |
| |
| *pbuf = s; |
| if (psize) |
| *psize = size; |
| } |
| |
| AP_DECLARE(const char *) ap_xml_empty_elem(apr_pool_t * p, |
| const ap_xml_elem *elem) |
| { |
| if (elem->ns == AP_XML_NS_NONE) { |
| /* |
| * The prefix (xml...) is already within the prop name, or |
| * the element simply has no prefix. |
| */ |
| return apr_psprintf(p, "<%s/>" DEBUG_CR, elem->name); |
| } |
| |
| return apr_psprintf(p, "<ns%d:%s/>" DEBUG_CR, elem->ns, elem->name); |
| } |
| |
| /* return the URI's (existing) index, or insert it and return a new index */ |
| AP_DECLARE(int) ap_xml_insert_uri(apr_array_header_t *uri_array, |
| const char *uri) |
| { |
| int i; |
| const char **pelt; |
| |
| for (i = uri_array->nelts; i--;) { |
| if (strcmp(uri, AP_XML_GET_URI_ITEM(uri_array, i)) == 0) |
| return i; |
| } |
| |
| pelt = apr_array_push(uri_array); |
| *pelt = uri; /* assume uri is const or in a pool */ |
| return uri_array->nelts - 1; |
| } |