Merge pull request #33 from NunoSempere/libre_redirect

feat: redirect websites to open-source frontends
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fenze 2022-12-18 16:27:20 +00:00 committed by GitHub
commit b16665809c
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9 changed files with 214 additions and 8 deletions

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@ -1,5 +1,6 @@
CC=clang
SRC=rose.c
REQS=./plugins/*/*.c
DEPS=('webkit2gtk-4.0')
INCS=`pkg-config --cflags ${DEPS[@]}`
@ -9,4 +10,4 @@ LIBS=`pkg-config --libs ${DEPS[@]}`
WYEBAB='-L/usr/lib/wyebrowser/adblock.so'
cp -f config.def.h config.h
$CC $INCS $LIBS $SRC $WYEBAB -o rose
$CC $INCS $LIBS $REQS $SRC $WYEBAB -o rose

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@ -0,0 +1,69 @@
#include "str_replace_start.h"
#include <string.h>
#include <stdio.h>
#include <stdbool.h>
#define LIBRE_N 19
#define DEBUG false
/* Inspired by https://libredirect.github.io/, but in C. */
void str_init(char* str, int n){
for(int i=0; i<n; i++){
str[i] = ' ';
}
str[n] = '\0';
} // could also use <https://manpages.ubuntu.com/manpages/impish/man3/strinit.3pub.html>
int libre_redirect(const char* uri, char* output){
int l1 = strlen(uri);
int l2 = strlen(output);
if((l2 - l1) < LIBRE_N){
if(DEBUG) printf("Not enough memory\n");
return 1; // not enough memory.
}else{
char tmp_uri[l2++];
char tmp_output[l2++];
strcpy(tmp_uri, uri); // strcpy also copies the terminating '\0'
strcpy(tmp_output, output);
char* annoying_sites[] = {
"https://www.youtube.com",
"https://www.reddit.com",
"https://medium.com",
"https://translate.google.com",
"https://forum.effectivealtruism.org",
"https://www.bloomberg.com",
"https://twitter.com"
};
char* alternatives[] = {
"https://yt.artemislena.eu",
"https://teddit.nunosempere.com",
"https://scribe.rip",
"https://simplytranslate.org/",
"https://ea.greaterwrong.com",
"https://archive.is/https://www.bloomberg.com",
"https://nitter.net"
};
int n = sizeof(annoying_sites)/sizeof(annoying_sites[0]);
for(int i=0; i<n ; i++){
int replace_check = str_replace_start(tmp_uri, annoying_sites[i], alternatives[i], output);
if(replace_check == 2){
if(DEBUG) printf("tmp_uri: %s\n", tmp_uri);
if(DEBUG) printf("output: %s\n", output);
// strcpy(output, tmp_uri);
// break;
return 2;
}else if(replace_check == 1){
if(DEBUG) printf("replace_check failed\n");
return 1;
}
strcpy(tmp_uri, output);
str_init(output, l2);
}
strcpy(output, tmp_uri);
}
if(DEBUG) printf("No match found\n\n");
return 0;
}

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@ -0,0 +1,9 @@
#ifndef LIBRE_REDIRECT
#define LIBRE_REDIRECT
#define LIBRE_N 19
int libre_redirect(const char* uri, char* uri_filtered);
void str_init(char* str, int n);
#endif

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@ -0,0 +1,60 @@
#include <string.h>
#include <stdbool.h>
#include <stdio.h>
#define DEBUG false
/*
See also:
* <https://web.archive.org/web/20160201212501/coding.debuntu.org/c-implementing-str_replace-replace-all-occurrences-substring>
* https://github.com/irl/la-cucina/blob/master/str_replace.c
*/
int str_replace_start(const char* string, const char* target, const char* replacement, char* output){
int l1 = strlen(string);
int l2 = strlen(target);
int l3 = strlen(replacement);
int l4 = strlen(output);
if(DEBUG) printf("%d,%d,%d,%d\n", l1, l2, l3, l4);
// if(DEBUG) printf("%s,%s,%s,%s\n", string, target, replacement, output);
if((l4 < (l1 - l2 + l3)) || l4 < l1 ){
// Not enough memory in output string.
if(DEBUG) printf("String not long enough.\n");
return 1;
}
/* else if(l1 < l2){
// Not even possible that there is a match.
if(DEBUG) printf("Target larger than string.\n");
strcpy(output, string);
} */
else {
if(DEBUG) printf("Looking for a match for %s in %s.\n", target, string);
int match = true;
for(int i=0; i<l2; i++){
if(string[i] != target[i]){
match = false;
break;
}
}
if(match){
if(DEBUG) printf("Found match.\n");
for(int i=0; i<l3; i++){
output[i] = replacement[i];
}
int counter = l3;
for(int i=l2; i<l1; i++){
output[counter] = string[i];
counter++;
}
output[counter] = '\0';
return 2; // success
}
else {
if(DEBUG) printf("Did not find match.\n");
strcpy(output, string);
}
}
return 0;
}

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@ -0,0 +1,6 @@
#ifndef STR_REPLACE_H_
#define STR_REPLACE_H_
int str_replace_start(const char* string, const char* target, const char* replacement, char* output);
#endif

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@ -0,0 +1,11 @@
#!/bin/bash
CC=gcc
FLAGS="-std=c99 -Wall -lm"
SRC=example.c
REQS="../str_replace_start.c ../libre_redirect.c"
echo -e "\n\n\n"
$CC $FLAGS $SRC $REQS -o example

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@ -0,0 +1,20 @@
#include "../libre_redirect.h"
#include <string.h>
#include <stdio.h>
int main(){
char uri[] = "https://reddit.com/r/blah";
int l = LIBRE_N + strlen(uri) + 1;
char uri_filtered[l];
str_init(uri_filtered, l);
if(!libre_redirect(uri, uri_filtered)){
printf("Filtered uri: %s\n", uri_filtered);
}else{
printf("Uri: %s\n", uri);
// failure; do something with the original uri.
}
}

44
rose.c
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@ -9,10 +9,12 @@
*
* @author: fenze <contact@fenze.dev>
*/
#include <string.h>
#include <stdbool.h>
#include <webkit2/webkit2.h>
#include "config.h"
#include <webkit2/webkit2.h>
#include "plugins/libre_redirect/libre_redirect.h"
#define CACHE \
"base-cache-directory", CACHE_DIR, \
@ -78,15 +80,43 @@ void load_uri(WebKitWebView *view, const char *uri)
}
}
void redirect_if_annoying(WebKitWebView *view, const char *uri){
int l = LIBRE_N + strlen(uri) + 1;
char uri_filtered[l];
str_init(uri_filtered, l);
int check = libre_redirect(uri, uri_filtered);
if(check == 2){
webkit_web_view_load_uri(view, uri_filtered);
}
}
void load_changed(WebKitWebView *self, WebKitLoadEvent load_event, GtkNotebook *notebook)
{
if (load_event == WEBKIT_LOAD_FINISHED) {
gtk_notebook_set_tab_label_text(notebook, GTK_WIDGET(self),
webkit_web_view_get_title(self));
gtk_widget_hide(GTK_WIDGET(bar));
}
switch (load_event) {
/* see <https://webkitgtk.org/reference/webkit2gtk/2.5.1/WebKitWebView.html> */
case WEBKIT_LOAD_STARTED:
redirect_if_annoying(self, webkit_web_view_get_uri(self));
break;
case WEBKIT_LOAD_REDIRECTED:
redirect_if_annoying(self, webkit_web_view_get_uri(self));
break;
case WEBKIT_LOAD_COMMITTED:
redirect_if_annoying(self, webkit_web_view_get_uri(self));
break;
case WEBKIT_LOAD_FINISHED:
{
const char* title = webkit_web_view_get_title(self);
gtk_notebook_set_tab_label_text(notebook, GTK_WIDGET(self),
title == NULL ? "" : title );
// gtk_widget_hide(GTK_WIDGET(bar));
break;
}
}
}
void notebook_append(GtkNotebook *notebook, const char *uri)
{
GdkScreen *screen = gtk_window_get_screen(GTK_WINDOW(window));