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c6ee3d79ad
* cfg.mk: Remove sc_prohibit_have_config_h from local-checks-to-skip * libwget/*.c: Include <config.h> unconditionally * src/*.c: Likewise * tests/*.c: Likewise
124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/*
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* Copyright(c) 2013 Tim Ruehsen
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* Copyright(c) 2015-2016 Free Software Foundation, Inc.
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*
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* This file is part of libwget.
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*
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* Libwget is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Libwget is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with libwget. If not, see <https://www.gnu.org/licenses/>.
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*
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*
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* Extracting URLs from Atom feeds (RFC 4287)
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*
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* Changelog
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* 15.12.2013 Tim Ruehsen created
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*
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* Example: http://ceciliaschola.org/feed/atom/
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*/
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#include <config.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <c-ctype.h>
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#include <wget.h>
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#include "private.h"
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/**
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* \file
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* \brief URL extraction from Atom feed XML data
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* \defgroup libwget-parse_atom Atom URL extraction routines
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* @{
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*
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* Routines for URL extraction from Atom feeds.
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*/
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struct atom_context {
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wget_vector_t
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*urls;
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};
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static void _atom_get_url(void *context, int flags, const char *dir, const char *attr, const char *val, size_t len, size_t pos G_GNUC_WGET_UNUSED)
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{
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struct atom_context *ctx = context;
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wget_string_t url;
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if (!val || !len)
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return;
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url.p = NULL;
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if ((flags & XML_FLG_ATTRIBUTE)) {
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if (!wget_strcasecmp_ascii(attr, "href") || !wget_strcasecmp_ascii(attr, "uri")
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|| !wget_strcasecmp_ascii(attr, "src") || !wget_strcasecmp_ascii(attr, "scheme")
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|| !wget_strcasecmp_ascii(attr, "xmlns") || !wget_strncasecmp_ascii(attr, "xmlns:", 6))
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{
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for (;len && c_isspace(*val); val++, len--); // skip leading spaces
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for (;len && c_isspace(val[len - 1]); len--); // skip trailing spaces
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url.p = val;
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url.len = len;
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if (!ctx->urls)
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ctx->urls = wget_vector_create(32, -2, NULL);
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wget_vector_add(ctx->urls, &url, sizeof(url));
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}
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}
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else if ((flags & XML_FLG_CONTENT)) {
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const char *elem = strrchr(dir, '/');
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if (elem) {
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elem++;
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if (!wget_strcasecmp_ascii(elem, "icon") || !wget_strcasecmp_ascii(elem, "id")
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|| !wget_strcasecmp_ascii(elem, "logo"))
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{
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for (;len && c_isspace(*val); val++, len--); // skip leading spaces
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for (;len && c_isspace(val[len - 1]); len--); // skip trailing spaces
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// debug_printf("#2 %02X %s %s '%.*s' %zd\n", flags, dir, attr, (int) len, val, len);
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url.p = val;
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url.len = len;
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if (!ctx->urls)
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ctx->urls = wget_vector_create(32, -2, NULL);
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wget_vector_add(ctx->urls, &url, sizeof(url));
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}
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}
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}
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}
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/**
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* \param[in] atom Atom XML data
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* \param[in,out] urls Pointer to return vector of URLs
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*
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* Finds all URLs within the Atom XML data \p atom and returns them
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* as vector in \p urls.
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*
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*/
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void wget_atom_get_urls_inline(const char *atom, wget_vector_t **urls)
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{
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struct atom_context context = { .urls = NULL };
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wget_xml_parse_buffer(atom, _atom_get_url, &context, XML_HINT_REMOVE_EMPTY_CONTENT);
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*urls = context.urls;
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}
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/**@}*/
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