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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
114 lines
3.1 KiB
C
114 lines
3.1 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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* Higher level CSS parsing routines
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*
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* Changelog
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* 15.01.2013 Tim Ruehsen created
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*
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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 <wget.h>
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#include "private.h"
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typedef struct {
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const char
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**encoding;
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wget_vector_t
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*uris;
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} _CSS_CONTEXT;
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static void _free_url(WGET_PARSED_URL *url)
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{
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xfree(url->url);
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xfree(url->abs_url);
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}
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// Callback function, called from CSS parser for each @charset found.
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static void _css_get_encoding(void *context, const char *encoding, size_t len)
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{
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_CSS_CONTEXT *ctx = context;
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// take only the first @charset rule
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if (!*ctx->encoding) {
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*ctx->encoding = wget_strmemdup(encoding, len);
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debug_printf(_("URI content encoding = '%s'\n"), *ctx->encoding);
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}
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}
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// Callback function, called from CSS parser for each URI found.
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static void _css_get_url(void *context, const char *url, size_t len, size_t pos)
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{
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_CSS_CONTEXT *ctx = context;
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WGET_PARSED_URL parsed_url = { .len = len, .pos = pos, .url = wget_strmemdup(url, len), .abs_url = NULL };
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if (!ctx->uris) {
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ctx->uris = wget_vector_create(16, -2, NULL);
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wget_vector_set_destructor(ctx->uris, (wget_vector_destructor_t)_free_url);
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}
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wget_vector_add(ctx->uris, &parsed_url, sizeof(parsed_url));
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}
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static void _urls_to_absolute(wget_vector_t *urls, wget_iri_t *base)
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{
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if (base && urls) {
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wget_buffer_t buf;
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wget_buffer_init(&buf, NULL, 1024);
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for (int it = 0; it < wget_vector_size(urls); it++) {
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WGET_PARSED_URL *url = wget_vector_get(urls, it);
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if (wget_iri_relative_to_abs(base, url->url, url->len, &buf))
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url->abs_url = wget_strmemdup(buf.data, buf.length);
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else
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error_printf("Cannot resolve relative URI '%s'\n", url->url);
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}
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wget_buffer_deinit(&buf);
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}
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}
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wget_vector_t *wget_css_get_urls(const char *css, size_t len, wget_iri_t *base, const char **encoding)
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{
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_CSS_CONTEXT context = { .encoding = encoding };
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wget_css_parse_buffer(css, len, _css_get_url, encoding ? _css_get_encoding : NULL, &context);
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_urls_to_absolute(context.uris, base);
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return context.uris;
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}
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wget_vector_t *wget_css_get_urls_from_localfile(const char *fname, wget_iri_t *base, const char **encoding)
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{
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_CSS_CONTEXT context = { .encoding = encoding };
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wget_css_parse_file(fname, _css_get_url, encoding ? _css_get_encoding : NULL, &context);
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_urls_to_absolute(context.uris, base);
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return context.uris;
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}
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