578 lines
18 KiB
C
Executable file
578 lines
18 KiB
C
Executable file
//Wiby HTML Parser
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//Separates text from an HTML file
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//Remember to also set sql_mode = "NO_BACKSLASH_ESCAPES" in my.cnf
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#define window_len 100
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#define charset_len 100
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#define mysqlcharset_len 100
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#define title_len 152
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#define keywords_len 1024
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#define description_len 182
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#define robots_len 100
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#define body_len 81920
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#define urlList_len 102400
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#define strURL_len 102400
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FILE *bodyfile,*titlefile, *keywordsfile, *descriptionfile, *noindexfile, *nofollowfile, *charsetfile, *urlfile, *shuffledurlfile;
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static char filename[] = "page.out";
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char window[window_len],windowWithSpaces[window_len],charset[charset_len+1],mysqlcharset[mysqlcharset_len+1],title[title_len+1],keywords[keywords_len+1],description[description_len+1],robots[robots_len+1],body[body_len+1];
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char urlList[urlList_len+1],strURL[strURL_len+1],urlListShuffled[urlList_len+1],urlListHoldShuffled[urlList_len+1];
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int titlefound=0,charsetfound=0,descriptionfound=0,keywordsfound=0,robotsfound=0,nofollow=0,noindex=0,scriptfound=0,stylefound=0,urlFound=0,urlTagFound=0,numURL=0,emptytitle=1,spaces=0,seeded=0,num_stylesheets=0,num_scripts=0,getURLs=1;
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long charsetsize=0,titlesize=0,keywordssize=0,descriptionsize=0,robotssize=0,bodysize=0;
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int matchMySQLcharset(int html_charset_length, char *html_charset, int html_match_length, char *html_lowercase_match, char *html_uppercase_match);
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int locateInWindow(char *window, char *birdLower, char *birdUpper, int length);
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int locateInURL(char *url, char *birdLower, char *birdUpper, int length, int urlSize);
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int canCrawl(int urlSize);
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void shuffleURLs(int iterations, long urlListSize);
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void sqlsafe();
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void charset2mysql();
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FILE *f;
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char *fileStr;
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char c;
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void htmlparse(){
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long urlListSize=0;
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numURL=0;
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int intag=0,incomment=0,inscript=0,instyle=0,inlink=0,putspace=0,spacecount=0;
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int urlSize=0,dqcount=0;
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titlefound=charsetfound=descriptionfound=keywordsfound=robotsfound=nofollow=noindex=scriptfound=stylefound=num_stylesheets=num_scripts=0;
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charsetsize=titlesize=keywordssize=descriptionsize=robotssize=bodysize=0;
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memset(window,'#',window_len);
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// window[window_len]=0;
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memset(windowWithSpaces,'#',window_len);
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// windowWithSpaces[window_len]=0;
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memset(charset,0,charset_len+1);
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memset(mysqlcharset,0,mysqlcharset_len+1);
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memset(title,0,title_len+1);
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memset(keywords,0,keywords_len+1);
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memset(description,0,description_len+1);
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memset(robots,0,robots_len+1);
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memset(body,0,body_len+1);
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memset(urlList,0,urlList_len+1);
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memset(strURL,0,strURL_len+1);
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memset(urlListShuffled,0,urlList_len+1);
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memset(urlListHoldShuffled,0,urlList_len+1);
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printf("Parsing HTML... ");
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//open html file and load into memory
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f = fopen(filename, "rb");
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fseek(f, 0, SEEK_END);
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long fsize = ftell(f);
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fseek(f, 0, SEEK_SET); /* same as rewind(f); */
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fileStr = malloc(fsize + 1);
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if(fread(fileStr, 1, fsize, f)){};
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fclose(f);
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fileStr[fsize] = 0;
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//Locate the charset, title, description, keywords, robots, body
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//must accomodate human error in markup
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//must double all single quotes for mysql safety
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//dont allow extra whitespace, ignore cr/lf/tabs
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//complete it all in one pass
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for(int i=0;i<fsize;i++){
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c = fileStr[i];
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int skipchar = 0;
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if(c== 10 || c == 13 || c == 14 || c == 15 || c == 127 || c == 0 || c == 9){
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skipchar = 1;
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}
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//use a rolling window of 100 bytes to detect elements, ignore lf/cr/so/si/space/null/tab
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if(skipchar == 0 && c != 32){
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for(int j=0;j<window_len-1;j++){
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window[j] = window[j+1];
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}
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window[window_len-1] = c;
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}
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//use a rolling window of 100 bytes to detect elements, but permit space, ignore lf/cr/null/tab
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if(skipchar == 0){
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for(int j=0;j<window_len-1;j++){
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windowWithSpaces[j] = windowWithSpaces[j+1];
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}
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windowWithSpaces[window_len-1] = c;
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}
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//Get Title
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if(titlefound == 2){
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if(titlesize < (title_len-2) && skipchar == 0){
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title[titlesize]=c;
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titlesize++;
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if(c == 39){//check for single quotes and double them up for sql safety
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title[titlesize]=c;
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titlesize++;
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}
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if(c != 32 && skipchar == 0){//some titles are just a bunch of spaces or garbage, need to check for that
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emptytitle = 0;
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}
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}
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if(locateInWindow(window,"</title>","</TITLE>",8)==1){
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titlefound = 3;
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//remove </title> from end of title by inserting null at location of <
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titlesize -= 8;
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title[titlesize] = 0;
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//printf("\n%s",title);
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}
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}
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if(titlefound == 1 && c=='>')//in case of this situation: <title some_nonsense>
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titlefound=2;
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if(titlefound == 0 && locateInWindow(window,"<title","<TITLE",6)==1){
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titlefound = 1;
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}
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//Get Charset
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if(charsetfound == 1){
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if(c == '>' || c == '/'){
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charsetfound = 2;
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//printf("\n%s",charset);
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}
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if(charsetfound == 1 && charsetsize < charset_len && c != '"' && c != '\'' && skipchar == 0){
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charset[charsetsize]=c;
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charsetsize++;
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}
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}
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if(charsetfound == 0 && locateInWindow(window,"charset=","CHARSET=",8)==1){
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charsetfound = 1;
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}
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//Get Description
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if(descriptionfound == 1){
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if(c == '>' || c == '/'){
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descriptionfound = 2;
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//printf("\n%s",description);
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}
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if(descriptionfound == 1 && descriptionsize < (description_len-2) && c != '"' && skipchar == 0){
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description[descriptionsize]=c;
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descriptionsize++;
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if(c == 39){//check for single quotes and double them up for sql safety
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description[descriptionsize]=c;
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descriptionsize++;
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}
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}
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}
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if(descriptionfound == 0 && locateInWindow(window,"description\"content=","DESCRIPTION\"CONTENT=",20)==1){
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descriptionfound = 1;
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}
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//Get Keywords
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if(keywordsfound == 1){
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if(c == '>' || c == '/'){
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keywordsfound = 2;
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//printf("\n%s",keywords);
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}
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if(keywordsfound == 1 && keywordssize < (keywords_len-2) && c != '"' && skipchar == 0){
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keywords[keywordssize]=c;
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keywordssize++;
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if(c == 39){//check for single quotes and double them up for sql safety
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keywords[keywordssize]=c;
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keywordssize++;
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}
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}
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}
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if(keywordsfound == 0 && locateInWindow(window,"keywords\"content=","KEYWORDS\"CONTENT=",17)==1){
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keywordsfound = 1;
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}
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//Get Robots (nofollow, noindex)
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if(robotsfound == 1){
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if(c == '>' || c == '/'){
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robotsfound = 2;
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//printf("\n%s",robots);
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if(locateInWindow(window,"nofollow","NOFOLLOW",8)==1)
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nofollow=1;
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if(locateInWindow(window,"noindex","NOINDEX",7)==1 || locateInWindow(window,"none","NONE",4)==1)
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noindex=nofollow=1;
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}
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if(robotsfound == 1 && robotssize < robots_len && c != '"' && c != '\'' && skipchar == 0){
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robots[robotssize]=c;
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robotssize++;
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}
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}
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if(robotsfound == 0 && locateInWindow(window,"robots\"content=","ROBOTS\"CONTENT=",15)==1){
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robotsfound = 1;
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}
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if(titlefound != 2){
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//Ignore between scripts, styles, and remove all tags, repeated spaces, tabs, cr, lf, null, add a space at end of every tag
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if(c=='<'){
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intag = 1;
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}else if(c=='>'){
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intag = 0;
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putspace = 1;
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}
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if(locateInWindow(window,"<!--","<!--",4)==1){
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incomment = 1;
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}else if(locateInWindow(window,"-->","-->",3)==1){
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incomment = 0;
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}
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if(locateInWindow(window,"<script","<SCRIPT",7)==1 && c != ' ' && skipchar == 0){
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inscript = 1;
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num_scripts++;
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}else if(locateInWindow(window,"</script>","</SCRIPT>",9)==1){
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inscript = 0;
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}
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if(locateInWindow(window,"<style","<STYLE",6)==1 && c != ' ' && skipchar == 0){
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instyle = 1;
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num_stylesheets++;
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}else if(locateInWindow(window,"</style>","</STYLE>",8)==1){
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instyle = 0;
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}
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if(locateInWindow(window,"<link","<LINK",5)==1){
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inlink = 1;
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}else if(inlink==1 && locateInWindow(window,">",">",1)==1){
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inlink = 0;
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}
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if(inlink==1){
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if(locateInWindow(window,".css",".CSS",4)==1 && c != ' ' && skipchar == 0)
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num_stylesheets++;
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}
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//Get Body
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//exclude remaining tags, comments, scripts, styles, cr, lf, null, tab, add a space after a '>' but only allow one
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if(intag == 0 && incomment == 0 && inscript == 0 && instyle == 0 && inlink == 0 && skipchar == 0 && bodysize < (body_len-2)){
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if(putspace == 1){
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if(spacecount == 0){
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body[bodysize]=32;
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bodysize++;
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}
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spacecount++;
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putspace=0;
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}else{
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if(c==32)
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spacecount++;
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else spacecount = 0;
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if(spacecount < 2){
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body[bodysize]=c;
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bodysize++;
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if(c == 39){//check for single quotes and double them up for sql safety
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body[bodysize]=c;
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bodysize++;
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}
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}
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}
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}
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}
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//Get URL's
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if(getURLs==1){
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if(urlFound == 1 && incomment==0 && instyle==0 && inscript==0 && inlink == 0){
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if(c=='"' || c=='\'')
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dqcount++;
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if((c == '#' && urlSize==0) || (dqcount == 2 && urlSize == 0) || (c == ' ' && urlSize == 0))
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urlFound=urlTagFound=dqcount=0;
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if((c == '>' || c == ' ') && urlFound == 1){
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if(canCrawl(urlSize)==0 || (urlSize+urlListSize) >= (urlList_len-1)){
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memset(strURL,0,strURL_len+1);
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}else{
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strcat(urlList,strURL);
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strcat(urlList,"\n");
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urlListSize+=urlSize+1;
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memset(strURL,0,strURL_len+1);
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numURL++;
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}
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urlFound = urlTagFound = urlSize = dqcount = 0;
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}
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if(urlFound == 1 && urlListSize < (urlList_len-2) && c != '"' && c != '\'' && urlSize < (strURL_len-2)){
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strURL[urlSize]=window[window_len-1];
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urlSize++;
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}
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if(urlSize==11){
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if(locateInWindow(window,"javascript:","JAVASCRIPT:",11)==1){
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urlFound=urlTagFound=urlSize=dqcount=0;
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memset(strURL,0,strURL_len+1);
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}
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}
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}
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if(urlFound == 0 && urlTagFound == 0 && incomment == 0 && instyle == 0 && inscript == 0 && inlink == 0 && locateInWindow(windowWithSpaces,"<a ","<A ",3)==1){//sometimes there is something between "<a" and "href"
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urlTagFound = 1;
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}
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if(urlFound == 0 && urlTagFound == 1 && incomment == 0 && instyle == 0 && inscript == 0 && inlink == 0 && locateInWindow(window,"href=","HREF=",5)==1){
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urlFound = 1;
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}
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}
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}
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//Convert charset to mysql equivalent
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charset2mysql();
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//print body to file
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/* bodyfile = fopen("body.txt","wb");
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fputs(body,bodyfile);
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fclose(bodyfile);
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//print title to file
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titlefile = fopen("title.txt","wb");
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fputs(title,titlefile);
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fclose(titlefile);
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//print keywords to file
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keywordsfile = fopen("keywords.txt","wb");
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fputs(keywords,keywordsfile);
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fclose(keywordsfile);
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//print description to file
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descriptionfile = fopen("description.txt","wb");
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fputs(description,descriptionfile);
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fclose(descriptionfile);
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//print charset to file
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charsetfile = fopen("charset.txt","wb");
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fputs(mysqlcharset,charsetfile);
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fclose(charsetfile);
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//print noindex to file
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noindexfile = fopen("noindex.txt","wb");
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if(noindex==1)
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fputs("noindex",noindexfile);
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fclose(noindexfile);
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//print nofollow to file
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nofollowfile = fopen("nofollow.txt","wb");
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if(nofollow==1)
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fputs("nofollow",nofollowfile);
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fclose(nofollowfile);*/
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if(getURLs==1){
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//shuffle order of collected URLs list
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shuffleURLs(10,urlListSize);
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//printf("\n%s",urlList);
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//print URLs to file
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/* urlfile = fopen("url.txt","wb");
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fputs(urlList,urlfile);
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fclose(urlfile);
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//print shuffled URLs to file
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shuffledurlfile = fopen("urlshuffled.txt","wb");
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fputs(urlListShuffled,shuffledurlfile);
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fclose(shuffledurlfile);*/
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}
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free(fileStr);
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printf("\nbody: %ld, title: %ld, charset: %ld, description: %ld, keywords: %ld, noindex: %d, nofollow: %d",bodysize,titlesize,charsetsize,descriptionsize,keywordssize,noindex,nofollow);
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}
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void shuffleURLs(int iterations, long urlListSize)
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{
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if(seeded==0){
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srand(time(NULL));
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seeded=1;
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}
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int r1,r2,r1to2;
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int urlCount,i,j,k,l;
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if(numURL>2){
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strcpy(urlListHoldShuffled,urlList);
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for(int loops=0;loops<iterations;loops++){
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r1 = r1to2 = (rand() % numURL) + 1;
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r2 = (rand() % numURL) + 1;
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if(r1>r2){
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r1=r2;
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r2=r1to2;
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}
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if(r1==r2){
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continue;
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}
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urlCount=i=j=k=l=0;
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//skip to url number r1
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while(urlCount < r1 /*&& i<urlList_len*/){
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if(urlListHoldShuffled[i]=='\n')
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urlCount++;
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i++;
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}
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j=i;
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//copy to urlListShuffled starting at j until reaching r2 location
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while(urlCount<r2 /*&& j<urlList_len*/){
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urlListShuffled[k]=urlListHoldShuffled[j];
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if(urlListHoldShuffled[j]=='\n')
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urlCount++;
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j++;
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k++;
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}
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//concat url's before i
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while(l<i /*&& k<urlList_len*/){
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urlListShuffled[k]=urlListHoldShuffled[l];
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l++;
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k++;
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}
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//concat url's after k
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while(k<urlListSize /*&& k<urlList_len*/){
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urlListShuffled[k]=urlListHoldShuffled[k];
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k++;
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}
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strcpy(urlListHoldShuffled,urlListShuffled);
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}
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}else{
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strcpy(urlListShuffled,urlList);
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}
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}
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void charset2mysql()
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{
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//if no charset specified, use utf8
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if(charsetsize == 0){
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strcpy(mysqlcharset,"SET CHARSET utf8;");
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printf("No Charset found. %s",mysqlcharset);
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}
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else{ //else, match charset with a proper mysql charset
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if(matchMySQLcharset(charsetsize,charset,5,"utf-8","UTF-8")==1){
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strcpy(mysqlcharset,"SET CHARSET utf8mb4;");
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printf("%s",mysqlcharset);
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}
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else if(matchMySQLcharset(charsetsize,charset,6,"latin1","LATIN1")==1){
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strcpy(mysqlcharset,"SET CHARSET latin1;");
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printf("%s",mysqlcharset);
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}
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else if(matchMySQLcharset(charsetsize,charset,9,"shift-jis","SHIFT-JIS")==1){
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strcpy(mysqlcharset,"SET CHARSET cp932;");
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printf("%s",mysqlcharset);
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}
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else if(matchMySQLcharset(charsetsize,charset,6,"x-sjis","X-SJIS")==1){
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strcpy(mysqlcharset,"SET CHARSET cp932;");
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printf("%s",mysqlcharset);
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}
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else if(matchMySQLcharset(charsetsize,charset,10,"iso-8859-1","ISO-8859-1")==1){
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strcpy(mysqlcharset,"SET CHARSET latin1;");
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printf("%s",mysqlcharset);
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}
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else if(matchMySQLcharset(charsetsize,charset,12,"windows-1252","WINDOWS-1252")==1){
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strcpy(mysqlcharset,"SET CHARSET latin1;");
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printf("%s",mysqlcharset);
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}
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else if(matchMySQLcharset(charsetsize,charset,12,"windows-1251","WINDOWS-1251")==1){
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strcpy(mysqlcharset,"SET CHARSET cp1251;");
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printf("%s",mysqlcharset);
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}
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else if(matchMySQLcharset(charsetsize,charset,6,"koi8-r","KOI8-R")==1){
|
|
strcpy(mysqlcharset,"SET CHARSET cp1251;");
|
|
printf("%s",mysqlcharset);
|
|
}
|
|
else if(matchMySQLcharset(charsetsize,charset,6,"euc-kr","EUC-KR")==1){
|
|
strcpy(mysqlcharset,"SET CHARSET euckr;");
|
|
printf("%s",mysqlcharset);
|
|
}
|
|
else if(matchMySQLcharset(charsetsize,charset,4,"big5","BIG5")==1){
|
|
strcpy(mysqlcharset,"SET CHARSET big5;");
|
|
printf("%s",mysqlcharset);
|
|
}
|
|
else{
|
|
strcpy(mysqlcharset,"SET CHARSET utf8;");
|
|
printf("Charset mismatch. %s",mysqlcharset);
|
|
}
|
|
}
|
|
}
|
|
|
|
int matchMySQLcharset(int html_charset_length, char *html_charset, int html_match_length, char *html_lowercase_match, char *html_uppercase_match)
|
|
{
|
|
int match = 0;
|
|
int i=0;
|
|
for(;i<html_match_length;i++){
|
|
if(i > html_charset_length){
|
|
return 0;
|
|
}
|
|
if(html_charset[i] != 95 && html_charset[i] != 45 && html_lowercase_match[i] != 95 && html_lowercase_match[i] != 45){ // _ or -
|
|
if(html_lowercase_match[i] != html_charset[i] && html_uppercase_match[i] != html_charset[i]){
|
|
return 0;
|
|
}
|
|
}
|
|
match = 1;
|
|
}
|
|
return match;
|
|
}
|
|
|
|
int locateInWindow(char *window, char *birdLower, char *birdUpper, int length)
|
|
{
|
|
int start = window_len-length;
|
|
for(int i=0;i<length;i++){
|
|
if(window[start] != birdLower[i] && window[start] != birdUpper[i]){
|
|
return 0;
|
|
}
|
|
start++;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int locateInURL(char *url, char *birdLower, char *birdUpper, int length, int urlSize)
|
|
{
|
|
long start = urlSize-length;
|
|
if(urlSize >= length){
|
|
for(int i=0;i<length;i++){
|
|
if(url[start] != birdLower[i] && window[start] != birdUpper[i]){
|
|
return 0;
|
|
}
|
|
start++;
|
|
}
|
|
return 1;
|
|
}else{
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
//Check if url can be indexed (allow relative links for html and txt files. Removing this check will add to the queue everything listed including external links.
|
|
int canCrawl(int urlSize){
|
|
int numDots=0,numSlash=0;
|
|
int slashpos=0,dotspos=0;
|
|
int extfound=0,extlocation=0,prefixfound=0;
|
|
|
|
for(int i=0;i<urlSize;i++){
|
|
if(urlSize>5 && strURL[i]==':' && i>3){
|
|
if((strURL[0]!='h' && strURL[0]!='H') || (strURL[1]!='t' && strURL[1]!='T') || (strURL[2]!='t' && strURL[2]!='T') || (strURL[3]!='p' && strURL[3]!='P') || (strURL[4]!='s' && strURL[4]!='S' && strURL[4]!=':') || (strURL[5]!=':' && strURL[5]!='/'))
|
|
return 0;
|
|
prefixfound=1;
|
|
}
|
|
if(strURL[i]=='?' || strURL[i]=='\\' || strURL[i] == '"' || strURL[i] == '\'' || strURL[i] == ' '){
|
|
return 0;
|
|
}
|
|
if(strURL[i]=='.'){
|
|
numDots++;
|
|
}
|
|
if(strURL[i]=='/'){
|
|
numSlash++;
|
|
}
|
|
if(strURL[i]=='.' ){
|
|
extfound=1;
|
|
extlocation=i;
|
|
}
|
|
if(strURL[i]=='/' && extfound==1 && i>extlocation){
|
|
extfound=0;
|
|
}
|
|
if(prefixfound==1 && numSlash-2<=0){
|
|
extfound=0;
|
|
}
|
|
}
|
|
if(numDots == 0){
|
|
return 1;
|
|
}
|
|
|
|
//restrict file extensions to these
|
|
if(extfound==1 && (locateInURL(strURL,".html",".HTML",5,urlSize)==1 || locateInURL(strURL,".htm",".HTM",4,urlSize)==1 || locateInURL(strURL,".txt",".TXT",4,urlSize)==1 || locateInURL(strURL,".php",".PHP",4,urlSize)==1 || locateInURL(strURL,".asp",".ASP",4,urlSize)==1 || locateInURL(strURL,".xhtml",".XHTML",6,urlSize)==1)){
|
|
return 1;
|
|
}
|
|
if(extfound==0 )
|
|
return 1;
|
|
return 0;
|
|
}
|