forked from sergiotarxz/mangareader
Adding untracked file by error.
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20fc7ff6a4
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272
manga.c
Normal file
272
manga.c
Normal file
@ -0,0 +1,272 @@
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#include <libsoup/soup.h>
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#include <libxml/HTMLparser.h>
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#include <libxml/xpath.h>
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#ifndef PCRE2_CODE_UNIT_WIDTH
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#define PCRE2_CODE_UNIT_WIDTH 8
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#include <pcre2.h>
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#endif
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#include <manga.h>
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char *
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get_request (const char *url, gsize *size_response_text) {
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SoupSession *soup_session;
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SoupMessage *msg;
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GValue response = G_VALUE_INIT;
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guint status;
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*size_response_text = 0;
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g_value_init (&response, G_TYPE_BYTES);
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soup_session = soup_session_new ();
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msg = soup_message_new ("GET", url);
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status = soup_session_send_message (soup_session, msg);
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g_object_get_property(
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G_OBJECT (msg),
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"response-body-data",
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&response);
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const char *html_response = g_bytes_get_data ((GBytes *)
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g_value_peek_pointer (&response),
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size_response_text);
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char *return_value = copy_binary_data(html_response, *size_response_text);
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g_value_unset (&response);
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g_object_unref (soup_session);
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g_object_unref (msg);
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return return_value;
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}
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char *
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copy_binary_data (const char *input, size_t size) {
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char *response = NULL;
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if (size) {
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response = g_realloc(response, sizeof *response * size);
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for (size_t i = 0; i<size; i++) {
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response[i] = input[i];
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}
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}
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return response;
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}
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xmlNodePtr *
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find_class (xmlNodePtr node, char *class, size_t *len, xmlNodePtr *nodes,
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int return_on_first) {
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for (xmlNodePtr child = node->children; child; child=child->next) {
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char *attr = get_attr (child, "class");
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if (attr && has_class (attr, class)) {
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(*len)++;
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nodes = g_realloc (nodes, sizeof *nodes * *len);
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nodes[*len-1] = child;
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if (return_on_first) {
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return nodes;
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}
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}
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if (node->children) {
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xmlNodePtr child = node->children;
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for (;child;child=child->next) {
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nodes = find_class (child, class, len, nodes,
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return_on_first);
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if (*len) {
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return nodes;
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}
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}
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}
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}
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return nodes;
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}
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void
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print_debug_nodes (const xmlDocPtr html_document,
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xmlNodePtr *nodes, size_t nodes_len) {
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xmlBufferPtr buffer = xmlBufferCreate ();
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for (int i = 0; i < nodes_len; i++) {
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xmlNodeDump (buffer, html_document, nodes[i],
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0, 1);
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}
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xmlBufferDump (stdout, buffer);
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xmlBufferFree (buffer);
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}
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char *
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get_attr (xmlNodePtr const node, const char *attr_name) {
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char *return_value = NULL;
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for (xmlAttr *attr = node->properties; attr; attr=attr->next) {
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if (!xmlStrcmp(attr->name, (const xmlChar *) attr_name)
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&& attr->children && attr->children->content) {
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if (!attr->children->content) continue;
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size_t content_len = strlen((char *)
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attr->children->content);
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return_value = alloc_string(content_len);
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copy_substring ((char *) attr->children->content, return_value,
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content_len,
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0,
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content_len);
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break;
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}
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}
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return return_value;
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}
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void
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copy_substring(const char *origin, char *dest, size_t dest_len, size_t start,
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size_t len) {
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size_t copying_offset = 0;
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while (copying_offset < len) {
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if (!(start+copying_offset <=dest_len)) {
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fprintf(stderr, "Read attempt out of bounds.%ld %ld %ld\n", dest_len, start, len);
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break;
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}
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dest[copying_offset] = origin[start+copying_offset];
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copying_offset++;
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}
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dest[len] = '\0';
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}
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int
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has_class (const char *class_attribute,
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const char *class_to_check) {
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char *re = "\\s+";
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struct SplittedString *classes;
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int return_value = 0;
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classes = split(re, strlen(re), class_attribute,
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strlen(class_attribute));
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for (int i = 0; i<classes->n_strings; i++) {
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if (strcmp(classes->substrings[i].content, class_to_check) == 0) {
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return_value = 1;
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goto cleanup_has_class;
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}
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}
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cleanup_has_class:
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splitted_string_free (classes);
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return return_value;
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}
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struct SplittedString *
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split(char *re_str, size_t re_str_size, const char *subject, size_t subject_size) {
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pcre2_code_8 *re;
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size_t start_pos = 0;
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size_t offset = 0;
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int regex_compile_error;
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PCRE2_SIZE error_offset;
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struct SplittedString *splitted_string;
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splitted_string = g_malloc (sizeof *splitted_string);
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splitted_string->n_strings = 0;
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splitted_string->substrings = NULL;
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re = pcre2_compile ((PCRE2_SPTR8) re_str,
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re_str_size, 0, ®ex_compile_error, &error_offset, NULL);
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while (start_pos < subject_size) {
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int will_break = 0;
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iterate_string_to_split(splitted_string, re, &will_break,
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subject, subject_size, &start_pos, &offset);
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if (will_break) {
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break;
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}
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}
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pcre2_code_free (re);
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re = NULL;
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return splitted_string;
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}
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char *
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alloc_string(size_t len) {
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char * return_value = NULL;
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return g_malloc (len + 1 * sizeof *return_value);
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}
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void
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splitted_string_free (struct SplittedString *splitted_string) {
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for (int i = 0; i<splitted_string->n_strings; i++) {
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g_free (splitted_string->substrings[i].content);
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}
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g_free (splitted_string->substrings);
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g_free (splitted_string);
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}
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void
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iterate_string_to_split(struct SplittedString *splitted_string, pcre2_code *re, int *will_break, const char *subject,
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size_t subject_size, size_t *start_pos, size_t *offset) {
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pcre2_match_data_8 *match_data;
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PCRE2_SIZE *ovector;
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int rc;
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splitted_string->n_strings++;
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match_data = pcre2_match_data_create_from_pattern_8 (re, NULL);
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rc = pcre2_match ( re, (PCRE2_SPTR8) subject, subject_size, *start_pos, 0, match_data,
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NULL);
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if (splitted_string->substrings) {
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splitted_string->substrings = g_realloc (splitted_string->substrings,
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(sizeof *splitted_string->substrings) * (*offset + 1));
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} else {
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splitted_string->substrings = g_malloc (sizeof *splitted_string->substrings);
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}
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if (rc < 0) {
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struct String *current_substring =
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&splitted_string->substrings [*offset];
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current_substring->content = alloc_string (subject_size
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- *start_pos);
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copy_substring (subject, current_substring->content,
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subject_size,
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*start_pos,
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subject_size - *start_pos);
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current_substring->size = subject_size - *start_pos;
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*will_break = 1;
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goto cleanup_iterate_string_to_split;
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}
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ovector = pcre2_get_ovector_pointer_8(match_data);
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splitted_string->substrings[*offset].content = alloc_string (
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ovector[0] - *start_pos);
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copy_substring (subject, splitted_string->substrings[*offset]
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.content,
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subject_size,
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*start_pos,
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ovector[0] - *start_pos);
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splitted_string->substrings[*offset].size =
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ovector[0] - *start_pos;
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*start_pos = ovector[1];
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*offset += 1;
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cleanup_iterate_string_to_split:
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pcre2_match_data_free (match_data);
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}
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xmlXPathObjectPtr
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get_nodes_xpath_expression (const xmlDocPtr document, char *xpath) {
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xmlXPathContextPtr context;
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xmlXPathObjectPtr result;
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context = xmlXPathNewContext (document);
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result = xmlXPathEvalExpression ((const xmlChar *)xpath, context);
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xmlXPathFreeContext (context);
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return result;
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}
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xmlNodePtr *
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loop_search_class (const xmlNodePtr node, xmlNodePtr *nodes,
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const char * class, size_t *len) {
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char *content = get_attr (node, "class");
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if (!content) {
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return nodes;
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}
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if (has_class (content, class)) {
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(*len)++;
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nodes = g_realloc (nodes, (sizeof *nodes) * *len);
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nodes[(*len)-1] = xmlCopyNode(node, XML_COPY_NODE_RECURSIVE);
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}
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g_free (content);
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return nodes;
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}
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